@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 #0000;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial}}}@layer theme{:root,:host{--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--radius-sm:.25rem;--radius-md:.375rem;--radius-lg:.5rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring:where(:not(iframe)){outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.absolute{position:absolute}.fixed{position:fixed}.m-3{margin:calc(var(--spacing) * 3)}.m-4{margin:calc(var(--spacing) * 4)}.m-5{margin:calc(var(--spacing) * 5)}.m-8{margin:calc(var(--spacing) * 8)}.m-10{margin:calc(var(--spacing) * 10)}.m-12{margin:calc(var(--spacing) * 12)}.m-13{margin:calc(var(--spacing) * 13)}.block{display:block}.contents{display:contents}.hidden{display:none}.table{display:table}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.resize{resize:both}.ring{--tw-ring-shadow:var(--tw-ring-inset,) 0 0 0 calc(1px + var(--tw-ring-offset-width)) var(--tw-ring-color,currentcolor);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.blur{--tw-blur:blur(8px);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}}:root{--bg-page:#f8faf9;--bg-surface:#fff;--bg-canvas:#edf3f0;--text-primary:#24352e;--text-secondary:#52675d;--text-muted:#596e65;--brand-600:#287257;--brand-hover:#205d47;--brand-100:#e3f1eb;--success:#26714e;--warning:#96601d;--danger:#b33232;--border:#dce8e2;--divider:#eaf0ec;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--shadow-panel:0 4px 16px #28583e08}.button,.link-button{border:1px solid var(--border);border-radius:var(--radius-sm);min-height:44px;color:var(--text-primary);font:inherit;cursor:pointer;white-space:nowrap;background:#fff;justify-content:center;align-items:center;gap:9px;padding:10px 17px;font-size:16px;font-weight:600;line-height:1.4;text-decoration:none;transition:background .14s,border-color .14s;display:inline-flex}.button:hover,.link-button:hover{background:#f0f6f6;border-color:#a9c2c6}.button--primary,.link-button--primary{background:var(--brand-600);border-color:var(--brand-600);color:#fff}.button--primary:hover,.link-button--primary:hover{background:var(--brand-hover);color:#fff;border-color:var(--brand-hover)}.button--ghost{background:0 0;border-color:#0000}.button:disabled{opacity:.45;cursor:not-allowed}.button[aria-pressed=true]{background:var(--brand-600);color:#fff;border-color:var(--brand-600)}.badge{color:var(--text-secondary);white-space:nowrap;background:#eef2f3;border-radius:5px;align-items:center;padding:4px 8px;font-size:13px;font-weight:600;line-height:1.6;display:inline-flex}.badge--brand{background:var(--brand-100);color:#086873}.badge--review{color:#835317;background:#fff3df}.panel{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-panel)}.search-input,select{border:1px solid var(--border);border-radius:var(--radius-sm);min-height:48px;color:var(--text-primary);font:inherit;background:#fff;padding:12px 15px}.search-input{width:100%}.search-input::placeholder{color:var(--text-muted)}.tab-list{border-bottom:1px solid var(--border);gap:8px;display:flex}.tab-list button{min-height:48px;color:var(--text-secondary);font:inherit;cursor:pointer;background:0 0;border:0;border-bottom:3px solid #0000;flex:1;padding:14px 12px;font-weight:600}.tab-list button[aria-selected=true]{color:var(--brand-600);border-bottom-color:var(--brand-600)}[role=tabpanel]{padding:20px}[role=tabpanel][hidden]{display:none}.dialog{border:1px solid var(--border);border-radius:var(--radius-lg);width:min(560px,100vw - 32px);color:var(--text-primary);background:#fff;padding:26px;box-shadow:0 20px 80px #102e3433}.dialog::backdrop{background:#102e3455}.dialog-heading,.dialog-footer{justify-content:space-between;align-items:center;gap:20px;display:flex}.dialog-heading h2{margin:0;font-size:23px}.dialog-body{color:var(--text-secondary);margin:18px 0;line-height:1.9}.dialog-footer{justify-content:flex-end;padding-top:12px}.tooltip-wrap{display:inline-flex;position:relative}.tooltip{background:var(--text-primary);color:#fff;visibility:hidden;z-index:10;border-radius:6px;width:220px;padding:8px 12px;font-size:14px;position:absolute;bottom:calc(100% + 8px);left:0}.tooltip-wrap:hover .tooltip,.tooltip-wrap:focus-within .tooltip{visibility:visible}.site-header{border-bottom:1px solid var(--divider);background:#fff;height:82px}.header-inner{align-items:center;gap:66px;max-width:1600px;height:100%;margin:auto;padding:0 48px;display:flex}.wordmark{color:var(--brand-600);letter-spacing:-1.5px;align-items:center;gap:5px;font-size:30px;font-weight:800;line-height:1;text-decoration:none;display:inline-flex}.brand-logo{flex-shrink:0;width:6.4em;height:48px;display:block;position:relative;overflow:hidden}.brand-logo img{width:100%;height:auto;position:absolute;top:50%;transform:translateY(-50%)}.site-header nav{gap:34px;height:100%;display:flex}.site-header nav a{border-bottom:3px solid #0000;align-items:center;padding:0 5px;font-weight:600;display:flex}.header-search{color:var(--text-secondary);align-items:center;gap:10px;min-height:44px;margin-left:auto;display:inline-flex}.page-container{max-width:1600px;margin:auto;padding:52px 48px 60px}.site-footer{border-top:1px solid var(--border);max-width:1600px;color:var(--text-muted);align-items:center;gap:26px;margin:auto;padding:26px 48px;font-size:14px;display:flex}.site-footer>:last-child{margin-left:auto;font-size:12px}.footer-brand{color:var(--brand-600);letter-spacing:-.5px;font-size:19px;font-weight:800}.eyebrow{color:var(--brand-600);letter-spacing:1px;margin:0 0 18px;font-size:14px;font-weight:600}.recent-section{margin-top:34px}.recent-section h2{align-items:center;gap:12px;font-size:19px;display:flex}.recent-section>p{color:var(--text-muted);font-size:14px}.recent-list{flex-wrap:wrap;gap:16px;display:flex}.recent-list a{border:1px solid var(--border);background:#fff;border-radius:8px;align-items:center;gap:16px;padding:15px 18px;display:inline-flex}.experiment-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;display:grid}.experiment-volumes{gap:54px;display:grid}.experiment-volume{scroll-margin-top:24px}.experiment-volume-heading{border-bottom:1px solid var(--border);align-items:baseline;gap:14px;margin-bottom:18px;padding-bottom:12px;display:flex}.experiment-volume-heading h3{margin:0;font-size:22px}.experiment-volume-heading span{color:var(--text-muted);font-size:13px}.experiment-card{border:1px solid var(--border);min-width:0;box-shadow:var(--shadow-panel);background:#fff;border-radius:12px;transition:border-color .16s,box-shadow .16s;overflow:hidden}.experiment-card:hover{border-color:#a4c4c8;box-shadow:0 8px 24px #2649510c}.card-visual{background:var(--bg-canvas);display:block}.apparatus-image{aspect-ratio:16/10;background:#eef1f4;width:100%;position:relative;overflow:hidden}.apparatus-image-empty{background:linear-gradient(145deg,#102936 0%,#1a3945 55%,#0d2632 100%)}.apparatus-image img{object-fit:contain}.card-body{padding:19px}.card-meta{color:var(--text-muted);margin:0 0 9px;font-size:13px}.card-body h3{min-height:64px;margin:0 0 22px;font-size:20px;line-height:1.6}.card-bottom{justify-content:space-between;align-items:center;gap:8px;display:flex}.card-link{color:var(--brand-600);white-space:nowrap;align-items:center;gap:6px;min-height:44px;font-size:14px;font-weight:600;display:inline-flex}.page-heading{margin:10px 0 34px}.page-heading h1{letter-spacing:-1px;margin:0 0 18px;font-size:36px}.page-heading>p:last-child{color:var(--text-secondary);line-height:1.9}.search-wrap{position:relative}.search-wrap>svg{width:20px;height:20px;color:var(--text-muted);position:absolute;top:16px;left:17px}.search-wrap input{height:52px;padding-left:47px}.filter-row{flex-wrap:wrap;gap:10px;margin:20px 0 28px;display:flex}.results-meta{color:var(--text-muted);justify-content:space-between;align-items:center;margin-bottom:16px;font-size:14px;display:flex}.empty-state{text-align:center;border:1px solid var(--border);background:#fff;border-radius:12px;padding:65px 24px}.empty-state>svg{width:34px;height:34px;color:var(--brand-600);margin:auto}.empty-state p{color:var(--text-secondary)}.empty-state .button{margin-top:16px}.breadcrumb{color:var(--text-secondary);margin-bottom:28px;font-size:14px}.breadcrumb ol{flex-wrap:wrap;gap:10px;margin:0;padding:0;list-style:none;display:flex}.breadcrumb li{align-items:center;gap:10px;display:flex}.breadcrumb a{align-items:center;min-height:44px;display:inline-flex}.intro-grid{grid-template-columns:1fr 1.1fr;align-items:center;gap:64px;display:grid}.intro-art{background:var(--bg-canvas);border-radius:16px;position:relative;overflow:hidden}.intro-art .apparatus-image{aspect-ratio:1.15}.intro-art>span{color:#52666c;font-size:13px;position:absolute;bottom:16px;left:20px}.intro-copy h1{margin:15px 0;font-size:36px;line-height:1.5}.intro-copy .card-meta{margin-top:20px}.intro-summary{color:var(--text-secondary);line-height:1.9}.badge-row{gap:10px;display:flex}.experiment-facts{gap:12px;margin:26px 0;font-size:15px;display:grid}.experiment-facts>div{gap:24px;display:flex}.experiment-facts dt{color:var(--text-muted);min-width:70px}.experiment-facts dd{margin:0}.detail-grid{grid-template-columns:1fr 1fr;gap:24px;margin-bottom:28px;display:grid}.detail-panel{padding:27px}.detail-panel h2{margin-top:0;font-size:22px}.goal-list{color:var(--text-secondary);padding-left:20px;line-height:2.2}.apparatus-tags{flex-wrap:wrap;gap:10px;display:flex}.apparatus-tags span{background:#f0f5f5;border-radius:6px;padding:7px 12px;font-size:15px}.not-found{max-width:640px;margin:15vh auto}.loading-state{color:var(--text-secondary);min-height:70vh}.loading-block{background:#e7eeee;border-radius:12px;height:300px;margin-top:25px}@media (max-width:1100px){.header-inner,.page-container{padding-left:28px;padding-right:28px}.intro-grid{gap:32px}}@media (max-width:700px){.site-header{height:auto}.header-inner{flex-wrap:wrap;gap:15px;padding:18px 20px 0}.wordmark{font-size:26px}.site-header nav{order:3;gap:24px;width:100%;height:50px}.header-search span{display:none}.page-container{padding:28px 20px}.page-heading h1{font-size:30px}.experiment-grid,.detail-grid,.intro-grid{grid-template-columns:1fr}.card-visual .apparatus-image{aspect-ratio:1.5}.card-body h3{min-height:0;font-size:20px}.results-meta{flex-direction:column;align-items:flex-start;gap:4px}.site-footer{flex-wrap:wrap;gap:12px;padding:24px 20px}.site-footer>:last-child{width:100%;margin-left:0}.intro-copy h1{font-size:30px}}.resource-workspace{--resource-surface:#fff;--resource-soft:#f2f7f4;--resource-hover:#eaf3ee;--resource-rail-width:clamp(96px, 7vw, 108px);--resource-topbar-height:76px;background:var(--resource-surface);min-height:100dvh;color:var(--text-primary);font-family:Microsoft YaHei,PingFang SC,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.resource-workspace button{cursor:pointer}.resource-topbar{z-index:3;height:var(--resource-topbar-height);border-bottom:1px solid var(--border);background:#fbfdfc url(/images/ui/sage-header-v1.png) right 180px center/360px no-repeat;align-items:center;gap:24px;padding:0 28px;display:flex;position:sticky;top:0}.resource-topbar .wordmark{letter-spacing:-.5px;white-space:nowrap;min-height:44px;font-size:30px;font-weight:750}.resource-topbar .auth-login-button{background:var(--brand-600);color:#fff;border-color:var(--brand-600);border-radius:10px;min-width:76px}.resource-topbar .auth-controls .auth-login-button:hover{background:var(--brand-hover);border-color:var(--brand-hover)}.resource-subject{border-left:1px solid var(--border);padding-left:24px;font-weight:650}.resource-edition,.resource-teacher{color:var(--text-secondary);font-size:14px}.resource-teacher{margin-left:auto}.resource-rail{top:var(--resource-topbar-height);width:var(--resource-rail-width);z-index:2;border-right:1px solid var(--border);background:#f1f7f4;flex-direction:column;gap:12px;padding:24px 10px;display:flex;position:fixed;bottom:0}.resource-rail>a{min-height:76px;color:var(--text-secondary);border-radius:12px;flex-direction:column;justify-content:center;align-items:center;gap:10px;font-size:14px;display:flex}.resource-rail>a svg{width:26px;height:26px}.resource-rail>a:hover{background:var(--resource-hover)}.resource-rail>a[aria-current]{color:var(--brand-600);background:var(--brand-100);font-weight:650}.resource-rail>p{text-align:center;color:var(--text-muted);margin:auto 0 0;font-size:12px;line-height:1.9}.resource-browser{grid-template-columns:248px minmax(0,1fr);display:grid}.resource-chapters{top:var(--resource-topbar-height);height:calc(100dvh - var(--resource-topbar-height));scrollbar-width:thin;border-right:1px solid var(--border);background:#fcfefd;align-self:start;padding:28px 14px 20px;position:sticky;overflow-y:auto}.resource-chapters h2{align-items:center;gap:8px;margin:0 10px 24px;font-size:18px;display:flex}.chapter-edition{justify-content:space-between;gap:8px;margin:0 10px 18px;font-size:14px;display:flex}.resource-chapters button{width:100%;color:inherit;text-align:left;background:0 0;border:0;border-radius:8px;transition:background-color .14s,color .14s}.resource-chapters :is(.chapter-all,.chapter-button,.chapter-volume-button){border-inline-start:3px solid #0000}.chapter-all{justify-content:space-between;align-items:center;min-height:44px;padding:10px;font-size:16px;font-weight:600;display:flex}.chapter-all span{font-variant-numeric:tabular-nums}.chapter-volume+.chapter-volume{border-top:1px solid var(--divider)}.chapter-volume-button{min-height:44px;padding:10px;font-size:16px;font-weight:650}.chapter-button{grid-template-columns:minmax(0,1fr) auto 13px;align-items:start;gap:8px;min-height:68px;padding:8px 10px;display:grid}.chapter-button>span:first-child{grid-area:1/1/auto/-1;gap:2px;font-size:16px;line-height:1.6;display:grid}.chapter-button small{color:var(--text-muted);padding-right:44px;font-size:14px}.chapter-button .chapter-count{color:var(--text-muted);font-variant-numeric:tabular-nums;grid-area:1/2;margin-top:2px;font-size:13px}.chapter-button svg{width:13px;height:13px;color:var(--text-muted);grid-area:1/3;margin-top:4px}.resource-chapters button:hover{background:var(--resource-hover)}.resource-chapters button[aria-pressed=true]{background:var(--brand-100);color:var(--brand-600);border-inline-start-color:var(--brand-600)}.chapter-note{color:var(--text-muted);padding:12px 10px 0;font-size:11px}.resource-content{width:100%;min-width:0;max-width:1680px;margin-inline:auto;padding:28px 28px 64px}.resource-heading{justify-content:space-between;align-items:center;gap:24px;margin-bottom:28px;display:flex}.resource-heading h1{letter-spacing:-.5px;margin:0;font-size:32px;font-weight:700}.resource-heading p{color:var(--text-secondary);margin:5px 0 0;font-size:16px}.resource-heading .search-wrap{flex-shrink:0;width:340px}.resource-heading .search-wrap input{background:var(--resource-soft);height:48px;color:var(--text-primary);border-radius:12px;font-size:16px}.resource-heading .search-wrap>svg{top:14px}.resource-topics{background:var(--resource-soft);border-radius:12px;padding:12px 16px 16px}.topics-heading{justify-content:space-between;align-items:center;min-height:44px;margin-bottom:6px;display:flex}.topics-heading h2{margin:0;font-size:18px}.topics-heading button,.resource-results-heading button{color:var(--brand-600);background:0 0;border:0;min-height:44px;padding:0 8px;font-size:12px}.topic-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;display:grid}.resource-topic{border:1px solid var(--border);background:var(--resource-surface);min-width:0;min-height:98px;color:var(--text-primary);text-align:left;border-radius:10px;grid-template-columns:minmax(0,1fr) 128px;padding:0;display:grid;overflow:hidden}.resource-topic:hover{border-color:var(--brand-600)}.resource-topic:active{transform:translateY(1px)}.topic-copy{flex-direction:column;gap:6px;padding:16px 12px;display:flex}.topic-copy strong{font-size:18px;font-weight:650}.topic-copy>span{display:none}.topic-copy small{color:var(--brand-600);align-items:center;gap:10px;margin-top:8px;font-size:14px;display:flex}.topic-copy small svg{width:15px;height:15px}.resource-topic .apparatus-image{aspect-ratio:auto;height:100%}.resource-filters{border-bottom:1px solid var(--border);flex-wrap:wrap;align-items:center;gap:12px;padding:16px 0;display:flex}.resource-filters .filter-row{align-items:center;gap:4px;margin:0}.resource-filters .filter-row>span{color:var(--text-muted);margin-right:12px;font-size:13px}.resource-filters .button{min-height:44px;color:var(--text-secondary);background:0 0;border:0;border-radius:8px;padding:8px 12px;font-size:16px;font-weight:500}.resource-filters .button:hover{background:var(--resource-hover)}.resource-unit-select{color:var(--text-muted);align-items:center;gap:10px;margin-left:auto;font-size:13px;display:flex}.resource-unit-select select{background:var(--resource-surface);max-width:230px;min-height:44px;color:var(--text-primary);font-size:13px}.resource-results-heading{flex-wrap:wrap;align-items:center;gap:14px;min-height:70px;display:flex}.resource-results-heading h2{margin:0;font-size:20px}.resource-results-heading p,.resource-results-heading>span{color:var(--text-muted);margin:0;font-size:13px}.resource-results-heading>span{margin-left:auto}.resource-content .experiment-volume{scroll-margin-top:88px}.resource-content .experiment-volume-heading{border:0;gap:10px;margin-bottom:14px;padding:0}.resource-content .experiment-volume-heading h3{font-size:16px}.resource-content .experiment-volume-heading span{font-size:13px}.resource-content .experiment-card{border:1px solid var(--border);background:var(--resource-surface);border-radius:12px;flex-direction:column;display:flex;box-shadow:0 3px 10px #28583e09}.resource-content .card-visual{border-radius:11px 11px 0 0;overflow:hidden}.resource-content .apparatus-image-empty{background:var(--resource-soft)}.resource-content .card-body{flex-direction:column;flex:1;padding:14px;display:flex}.resource-content .card-meta{margin-bottom:2px;font-size:14px}.resource-content .card-body h3{min-height:44px;margin-bottom:4px;font-size:18px;line-height:1.6}.resource-content .card-body h3 a{align-items:center;min-height:44px;display:flex}.resource-content .card-bottom{margin-top:auto}.resource-content .experiment-card:hover{border-color:#a6c6b6;box-shadow:0 6px 18px #28583e12}.resource-content .experiment-card:focus-within{border-color:var(--brand-600)}.resource-content .card-bottom .badge{background:var(--brand-100);color:var(--brand-600);font-size:14px}.resource-content .card-link{font-size:14px}.resource-content .empty-state{background:var(--resource-soft)}.resource-content .recent-list a{background:var(--resource-surface)}@media (max-width:1399px){.resource-browser{grid-template-columns:222px minmax(0,1fr)}.resource-content{padding-inline:22px}.resource-content .experiment-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.resource-topic{grid-template-columns:minmax(0,1fr) 100px}.topic-copy>span{display:none}}@media (max-width:1023px){.resource-workspace{--resource-rail-width:80px}.resource-rail{width:80px}.resource-main{margin-left:80px}.resource-browser{grid-template-columns:200px minmax(0,1fr)}.resource-content{padding-inline:18px}.resource-heading{flex-direction:column;align-items:stretch;gap:14px}.resource-heading .search-wrap{width:100%}.resource-content .experiment-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-grid{grid-template-columns:1fr}.resource-topic{grid-template-columns:minmax(0,1fr) 80px}.topic-copy{flex-flow:wrap;justify-content:space-between;align-items:center;gap:6px 12px;padding:12px}.topic-copy small{white-space:nowrap;margin:0}}@media (max-width:767px){.resource-workspace{--resource-topbar-height:64px}.resource-topbar{background-image:none;gap:16px;height:64px;padding:0 16px}.resource-topbar .wordmark{font-size:24px}.resource-subject{padding-left:16px;font-size:14px}.resource-edition,.resource-teacher{display:none}.resource-rail{border-right:0;border-bottom:1px solid var(--border);flex-direction:row;justify-content:space-around;gap:8px;width:100%;height:56px;padding:4px 12px;position:sticky;top:64px}.resource-rail>a{flex-direction:row;gap:6px;min-height:44px;padding:0 12px}.resource-rail>a svg{width:18px;height:18px}.resource-rail>p{display:none}.resource-main{margin-left:0}.resource-browser{display:block}.resource-chapters{display:none}.resource-content{padding:22px 16px 40px}.resource-content .experiment-grid{grid-template-columns:1fr;gap:24px}.resource-unit-select{width:100%;margin:0}.resource-unit-select select{flex:1;max-width:none}.resource-results-heading{gap:8px 12px;padding-block:16px}.resource-results-heading h2{flex-basis:100%}}.lab-shell{background:#edf2f3;flex-direction:column;min-height:100dvh;display:flex}.activity-shell{background:#eaf0f1;min-height:100dvh}.activity-overview{color:#eaf6f5;background:radial-gradient(circle at 85% -40%,#1b6973 0,#0000 40%),linear-gradient(125deg,#102b33,#17424b 65%,#19333b);border-bottom:4px solid #59c5bb;padding:25px clamp(16px,3vw,44px) 22px}.activity-overview-heading{justify-content:space-between;align-items:flex-start;gap:24px;display:flex}.activity-catalog-link{color:#a9ded7;font-size:13px;text-decoration:none}.activity-overview h1{letter-spacing:.02em;margin:5px 0 7px;font-size:clamp(24px,2.6vw,36px)}.activity-overview p{color:#bdd6d8;max-width:1020px;margin:0;font-size:14px;line-height:1.55}.activity-completion{text-align:right;flex-shrink:0;min-width:104px}.activity-completion strong{color:#b7e8de;font-variant-numeric:tabular-nums;font-size:34px;line-height:1.1;display:block}.activity-completion strong span{color:#8ba9af;font-size:18px}.activity-completion small{color:#a7c4c6;font-size:11px;display:block}.activity-station-strip{grid-template-columns:repeat(7,minmax(0,1fr));gap:7px;margin-top:20px;display:grid}.activity-station{color:#d2e8e8;min-width:0;min-height:68px;font:inherit;text-align:left;cursor:pointer;background:#ffffff0b;border:1px solid #52717a;border-radius:10px;align-items:flex-start;gap:9px;padding:9px 10px;transition:background .2s,border-color .2s,transform .2s;display:flex}.activity-station:hover{background:#ffffff1b;transform:translateY(-2px)}.activity-station.is-active{background:#2f756f70;border-color:#77dbcf;box-shadow:inset 0 0 0 1px #77dbcf}.activity-station.is-complete .activity-station-index{color:#12333a;background:#69cbbb}.activity-station-index{background:#31525b;border-radius:6px;place-items:center;min-width:27px;height:27px;font-size:12px;font-weight:800;display:grid}.activity-station-text{gap:4px;min-width:0;display:grid}.activity-station-text strong{font-size:12px;line-height:1.3}.activity-station-text small{color:#a9c9c9;font-size:10px}.activity-station-details{border-top:1px solid #42616a;justify-content:space-between;align-items:center;gap:16px;margin-top:15px;padding-top:14px;display:flex}.activity-kicker{color:#91ddd0;letter-spacing:.1em;font-size:11px;font-weight:700}.activity-station-details h2{margin:2px 0 3px;font-size:18px}.activity-station-details p{font-size:12px}.activity-evidence{flex-wrap:wrap;gap:5px;margin-top:7px;display:flex}.activity-evidence span{color:#c4f0e7;font-variant-numeric:tabular-nums;border:1px solid #74b3b0;border-radius:4px;padding:3px 7px;font-size:11px}.activity-evidence-empty{color:#8fb0b4!important;margin-top:6px!important}.activity-next{color:#15383d;min-width:144px;min-height:48px;font:inherit;cursor:pointer;background:#a8e8dc;border:1px solid #92e2d2;border-radius:8px;justify-content:space-between;align-items:center;gap:10px;padding:0 15px;font-weight:700;display:flex}.activity-next:disabled{cursor:not-allowed;opacity:.45}.activity-shell .lab-shell{min-height:calc(100dvh - 240px)}@media (max-width:1050px){.activity-station-strip{padding-bottom:4px;display:flex;overflow-x:auto}.activity-station{flex:0 0 148px}}@media (max-width:650px){.activity-overview-heading{display:block}.activity-completion{text-align:left;margin-top:10px}.activity-station-details{flex-direction:column;align-items:stretch}.activity-next{width:100%}}.lab-header{border-bottom:1px solid var(--border);background:#fff;align-items:center;gap:20px;min-height:78px;padding:15px 28px;display:flex}.lab-header h1{margin:0;font-size:21px;font-weight:650}.lab-back{border-left:1px solid var(--border);min-width:44px;min-height:44px;color:var(--text-secondary);place-items:center;display:grid}.lab-header-actions{gap:8px;margin-left:auto;display:flex}.lab-workspace{flex:1;grid-template-columns:220px minmax(0,1fr) 250px;gap:12px;min-height:460px;padding:0 16px;display:grid}.lab-workspace.lab-workspace-free{grid-template-columns:220px minmax(0,1fr)}.teacher-panel[hidden]{display:none}@media (max-width:700px){.lab-workspace.lab-workspace-free{grid-template-columns:1fr}}.equipment-panel,.teacher-panel{border:1px solid var(--border);background:#fff;border-radius:12px;min-width:0;overflow:hidden}.equipment-panel [role=tabpanel]{max-height:calc(100dvh - 310px);padding:16px;overflow-y:auto}.palette-hint{color:var(--text-muted);margin:0 0 16px;font-size:13px}.equipment-list{gap:9px;display:grid}.equipment-item{text-align:left;border:1px solid var(--border);min-height:55px;font:inherit;color:var(--text-primary);cursor:pointer;background:#f7fafa;border-radius:8px;align-items:center;gap:13px;padding:12px;display:flex}.equipment-item[aria-pressed=true]{background:var(--brand-100);border-color:var(--brand-600);color:#075e68}.equipment-index{color:var(--text-muted);font-size:12px}.experiment-controls{gap:18px;display:grid}.experiment-control{border:0;margin:0;padding:0}.experiment-control legend{margin-bottom:9px;font-weight:650}.condition-options{gap:8px;display:grid}.condition-options .button{white-space:normal;width:100%}.number-control{grid-template-columns:1fr auto;align-items:center;gap:10px;min-height:44px;display:grid}.number-control input{width:100%;min-width:0;min-height:44px}.numeric-condition{border:1px solid var(--brand-600);background:var(--bg-panel,white);border-radius:10px;gap:8px;padding:12px;display:grid}.numeric-condition-entry{align-items:center;gap:8px;display:flex}.numeric-condition-entry input{border:2px solid var(--brand-600);color:#102f39;background:#fff;border-radius:6px;width:100%;min-width:0;min-height:48px;padding:8px;font-size:22px}.numeric-condition-entry span{flex-shrink:0}.numeric-condition [role=alert]{color:#b42318;margin:0}.numeric-apply-feedback{color:#123b43;overflow-wrap:anywhere;background:#e8f5f5;border-left:3px solid #078798;padding:10px;font-size:14px;line-height:1.6}.numeric-apply-feedback p{margin:6px 0 0}.observation-list{color:var(--text-secondary);gap:12px;margin:0;padding-left:24px;display:grid}.observation-list li::marker{color:var(--brand-600);font-weight:700}.lab-stage{background:#e4eaed;border:1px solid #dae2e4;border-radius:12px;flex-direction:column;justify-content:center;min-width:0;display:flex;position:relative;overflow:hidden}.stage-status{z-index:1;color:var(--text-secondary);justify-content:space-between;align-items:center;font-size:14px;display:flex;position:absolute;top:19px;left:20px;right:20px}.stage-canvas{aspect-ratio:16/9;width:100%;position:relative}.stage-canvas canvas{touch-action:none;display:block;position:absolute;inset:0}.stage-canvas canvas:focus-visible{outline:3px solid var(--brand-600);outline-offset:-3px}.lab-stage-three{background:radial-gradient(circle at 50% 33%,#2c5661 0%,#173942 48%,#0b242d 100%);border-color:#214f5d}.lab-stage-dark{background:#102730;border-color:#315968}.lab-stage-dark .stage-status,.lab-stage-dark .stage-caption{color:#e5f5f7}.stage-action-hint{z-index:2;color:#edfaff;pointer-events:none;background:#102d37e8;border:1px solid #62c5d670;border-left:4px solid #67d6de;border-radius:8px;gap:3px;max-width:min(380px,100% - 40px);padding:10px 14px;display:grid;position:absolute;top:58px;left:20px;box-shadow:0 12px 28px #071b2673}.stage-action-hint span{color:#9cdbe3;letter-spacing:.08em;font-size:11px;font-weight:700}.stage-action-hint strong{font-size:15px;line-height:1.4}.lab-stage-three .stage-status{z-index:3;color:#d5edf0}.lab-stage-three .stage-canvas{overflow:hidden}.water-three-canvas{cursor:pointer}.water-three-hud{z-index:2;pointer-events:none;color:#f4fcfc;font-variant-numeric:tabular-nums;position:absolute;inset:0}.water-three-label{background:#103844b8;border:1px solid #8bd5e380;border-radius:8px;flex-direction:column;gap:3px;min-width:86px;padding:8px 10px;font-size:12px;display:flex;position:absolute;top:29%;box-shadow:0 12px 24px #071e2555}.water-three-label strong{font-size:19px}.water-three-label-left{border-color:#70cdea99;left:4%}.water-three-label-right{border-color:#ea99;right:4%}.water-three-equation{background:#0c2b36d9;border:1px solid #a6dee57a;border-radius:10px;flex-direction:column;gap:2px;padding:9px 13px;display:flex;position:absolute;top:12%;right:3.5%;box-shadow:0 12px 28px #061c2580}.water-three-equation span,.water-three-equation small{color:#c3e3e7;font-size:11px}.water-three-equation strong{letter-spacing:.025em;font-size:17px}.water-three-phenomenon{background:#0b3442df;border:1px solid #9ce7e9b0;border-radius:9px;flex-direction:column;gap:2px;padding:8px 11px;font-size:12px;display:flex;position:absolute;top:46%;box-shadow:0 0 22px #68d4e066}.water-three-phenomenon strong{font-size:14px}.water-three-phenomenon-left{left:3.5%}.water-three-phenomenon-right{border-color:#f3b590b0;right:3.5%;box-shadow:0 0 22px #edaa7355}.water-three-actions{pointer-events:auto;flex-wrap:wrap;justify-content:center;gap:7px;display:flex;position:absolute;bottom:40px;left:16px;right:16px}.water-three-actions button{color:#f5ffff;min-width:44px;min-height:44px;font:inherit;cursor:pointer;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#103f4bdc;border:1px solid #b8e3e6a6;border-radius:8px;padding:8px 12px;font-size:13px;font-weight:650}.water-three-actions button:first-child{background:#0c8998;border-color:#73dbe3}.water-three-actions button:hover:not(:disabled),.water-three-actions button:focus-visible{outline-offset:1px;background:#13748a;outline:2px solid #b8eff2}.water-three-actions button:disabled{cursor:default;opacity:.5}.water-three-hint{text-align:center;color:#d8edef;margin:0;font-size:11px;position:absolute;bottom:9px;left:15px;right:15px}.lab-stage-three .stage-loading{z-index:4}.stage-loading{text-align:center;background:var(--bg-surface);place-content:center;display:grid;position:absolute;inset:60px 24px 90px}.stage-status,.stage-caption{pointer-events:none}.stage-debug{margin:16px}.stage-debug pre{max-height:360px;overflow:auto}.stage-debug-panel{border-radius:var(--radius-lg);color:var(--text-primary);background:#f4fafb;border:1px solid #9ac7cd;margin:16px;padding:20px}.stage-debug-panel>header{justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:16px;display:flex}.stage-debug-panel h2,.stage-debug-panel h3{margin:0}.debug-kicker,.debug-live{color:var(--brand-600);letter-spacing:.08em;font-size:12px;font-weight:700}.debug-live:before{background:var(--brand-600);content:"";border-radius:50%;width:8px;height:8px;margin-right:6px;display:inline-block}.debug-metrics{grid-template-columns:repeat(6,minmax(110px,1fr));gap:10px;margin:0 0 20px;display:grid}.debug-metrics>div{border:1px solid var(--border);border-radius:var(--radius-md);background:#fff;padding:10px 12px}.debug-metrics dt{color:var(--text-muted);font-size:12px}.debug-metrics dd{margin:4px 0 0;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-weight:700}.debug-table-wrap{border:1px solid var(--border);border-radius:var(--radius-md);background:#fff;max-height:320px;margin-top:10px;overflow:auto}.debug-rules table{border-collapse:collapse;width:100%;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:13px}.debug-rules th,.debug-rules td{border-bottom:1px solid var(--border);text-align:left;white-space:nowrap;padding:8px 10px}.debug-rules .is-matched{background:#e5f5f5}.debug-details{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:16px;display:grid}.debug-details details{border:1px solid var(--border);border-radius:var(--radius-md);background:#fff;min-width:0;padding:10px}.debug-details summary{cursor:pointer;font-weight:700}.debug-details pre{max-height:320px;font-size:12px;overflow:auto}@media (max-width:1100px){.debug-metrics{grid-template-columns:repeat(3,1fr)}.debug-details{grid-template-columns:1fr}}.asset-preview{max-width:1280px;margin:32px auto;padding:24px}.asset-controls{flex-wrap:wrap;gap:24px;margin:24px 0;display:flex}.asset-controls select{border:1px solid var(--border);background:#fff;min-height:44px;padding:8px}.asset-manifest{max-height:400px;overflow:auto}.process-preview{border-top:1px solid var(--border);margin-top:48px;padding-top:32px}.process-status{min-height:24px;color:var(--text-muted)}.equipment-item:disabled{cursor:wait;opacity:.55}.equipment-list+.button{margin-top:16px}.stage-caption{color:#3c5961;align-items:center;gap:14px;display:flex;position:absolute;bottom:24px;left:24px;right:24px}.stage-caption>svg{width:25px;height:25px}.stage-caption strong{font-size:17px;font-weight:500}.stage-caption p{margin:6px 0 0;font-size:13px}.teacher-panel{flex-direction:column;display:flex}.teacher-panel [role=tabpanel]{max-height:max(160px,100dvh - 460px);overflow-y:auto}.teacher-panel>h2{color:#146c77;margin:23px 22px 15px;font-size:21px}.teacher-goals{color:var(--text-secondary);padding-left:21px;line-height:1.9}.teacher-goals li{margin-bottom:20px;padding-left:5px}.teacher-goals li::marker{color:var(--brand-600);font-weight:700}.lab-guidance{color:var(--text-primary);padding:2px 0 16px}.guide-progress{color:#087685;margin:0 0 12px;font-size:13px;font-weight:700}.guide-steps{gap:8px;margin:16px 0;padding:0;list-style:none;display:grid}.guide-steps li{color:var(--text-secondary);align-items:center;gap:9px;font-size:14px;display:flex}.guide-steps li.is-active{color:#075e68;font-weight:700}.guide-steps li.is-complete{color:#357a68}.guide-step-number{background:#e8f0f1;border-radius:50%;flex:0 0 25px;place-items:center;width:25px;height:25px;font-size:12px;display:grid}.is-active .guide-step-number{color:#fff;background:#087f8c}.is-complete .guide-step-number{background:#d9efe6}.guide-current{background:#f1faf9;border:1px solid #a9d0d2;border-radius:10px;padding:14px}.guide-current strong{font-size:15px;line-height:1.55;display:block}.guide-feedback{color:#315d65;margin:9px 0;font-size:13px}.guide-demo-button{color:#075e68;width:100%;min-height:44px;font:inherit;cursor:pointer;background:#fff;border:1px solid #087f8c;border-radius:8px;font-weight:700}.guide-demo-button:hover{background:#e0f2f1}.guide-demo-button:focus-visible{outline-offset:2px;outline:3px solid #087f8c}.guide-assist{border-top:1px solid #c4dddc;margin-top:12px;padding-top:10px}.guide-assist p{color:#315d65;margin:0 0 9px;font-size:12px;line-height:1.5}.guide-assist-actions{grid-template-columns:1fr;gap:8px;display:grid}.guide-assist-actions button{color:#075e68;min-height:44px;font:inherit;cursor:pointer;background:#fff;border:1px solid #087f8c;border-radius:8px;padding:7px 8px;font-size:13px;font-weight:700}.guide-assist-actions button:last-child{color:#fff;background:#087f8c}.guide-assist-actions button:disabled{color:#788e92;cursor:not-allowed;background:#e9f0f0;border-color:#c5d4d6}.guide-assist-actions button:focus-visible{outline-offset:2px;outline:3px solid #087f8c}.stage-demo-hint{z-index:3;color:#f4ffff;pointer-events:none;background:#103d46ed;border:1px solid #75d9d1;border-left:5px solid #69e6c8;border-radius:10px;gap:5px;width:min(340px,42%);padding:13px 16px;display:grid;position:absolute;top:58px;right:22px;box-shadow:0 12px 28px #061b26a8,0 0 20px #54d4bd33}.stage-demo-hint span{color:#90f0d9;font-size:12px;font-weight:800}.stage-demo-hint strong{font-size:15px;line-height:1.5}.stage-demo-hint small{color:#bddfdf;font-size:11px}.stage-demo-actions{flex-wrap:wrap;gap:6px;margin-top:6px;display:flex}.stage-demo-actions button{color:#075e68;min-height:44px;font:inherit;pointer-events:auto;cursor:pointer;background:#f0fffb;border:1px solid #81d5cd;border-radius:7px;padding:0 10px;font-size:12px;font-weight:800}.stage-demo-actions button:focus-visible{outline-offset:2px;outline:3px solid #fff}.guide-demo-panel{color:#123d46;background:#e1f3f1;border-radius:9px;margin-top:12px;padding:12px}.guide-demo-panel p{margin:0 0 8px;line-height:1.5}.guide-demo-panel .guide-demo-count{color:#087685;font-weight:800}.guide-demo-panel small{color:#426168;margin-bottom:10px;display:block}.guide-demo-actions{flex-wrap:wrap;gap:6px;display:flex}.guide-demo-actions button{color:#075e68;min-height:44px;font:inherit;cursor:pointer;background:#fff;border:1px solid #81b6bb;border-radius:8px;padding:0 12px;font-weight:700}.guide-demo-actions button:focus-visible{outline-offset:2px;outline:3px solid #087f8c}.experiment-control.is-demo-target{outline-offset:3px;background:#e1f3f1;outline:3px solid #14b8a6}.guide-readouts{border-top:1px solid var(--border);margin-top:16px;padding-top:12px}.guide-readouts h3{color:var(--text-secondary);margin:0 0 8px;font-size:13px}.guide-readouts dl{gap:7px;margin:0;display:grid}.guide-readouts dl>div{justify-content:space-between;gap:10px;font-size:13px;display:flex}.guide-readouts dt{color:var(--text-secondary)}.guide-readouts dd{font-variant-numeric:tabular-nums;margin:0;font-weight:700}.teacher-footnote{color:var(--text-muted);margin:auto 20px 24px;padding-top:24px;font-size:13px}.side-empty{color:var(--text-secondary);padding-top:18px;font-size:15px;line-height:1.9}.side-empty>svg{color:#6e989e;width:25px;height:25px}.side-empty h2,.side-empty h3{font-size:18px}.teacher-toolbar{border:1px solid var(--border);background:#fff;border-radius:12px;justify-content:center;align-items:center;gap:28px;margin:12px 16px 0;padding:16px 22px;display:flex}.toolbar-group{gap:10px;display:flex}.speed-group{border:1px solid var(--border);background:#f5f8f8;border-radius:10px;gap:4px;padding:4px;display:flex}.speed-group .button{background:0 0;border-color:#0000;min-width:60px}.speed-group .button[aria-pressed=true]{background:var(--brand-600)}.lab-message{text-align:center;min-height:24px;color:var(--text-secondary);margin:6px 0;font-size:13px}.lab-shell:fullscreen{overflow-y:auto}@media (min-width:1650px){.lab-workspace{grid-template-columns:230px minmax(0,1fr) 260px}.lab-header h1{font-size:24px}.lab-stage{min-height:650px}}@media (max-width:1150px){.lab-header{flex-wrap:wrap;gap:10px;padding:14px 20px}.lab-workspace{grid-template-columns:180px minmax(0,1fr) 210px}.lab-header h1{font-size:18px}.lab-header-actions{gap:0}.teacher-toolbar{flex-wrap:wrap;gap:12px}.teacher-panel [role=tabpanel]{padding:14px}}@media (max-width:800px){.teacher-panel{order:0}.equipment-panel{order:1}.teacher-panel [role=tabpanel]{max-height:none}.lab-header h1{order:3;width:100%}.lab-header .wordmark{font-size:23px}.lab-header-actions .button{padding:10px}.lab-workspace{grid-template-columns:1fr;padding:0 12px}.lab-stage{order:-1;min-height:360px}.stage-caption strong{font-size:16px}.equipment-list{grid-template-columns:1fr 1fr}.equipment-panel [role=tabpanel]{max-height:260px}.teacher-toolbar{margin:12px;padding:14px}.teacher-toolbar .button{padding:10px 12px}.teacher-footnote{padding-top:0}}.free-lab{color:#d8e0e5;--free-border:#424a50;background:#30373d;height:100dvh;min-height:540px;font-size:14px;position:relative;overflow:hidden}.free-lab button,.free-lab a{min-width:44px;min-height:44px;color:inherit;cursor:pointer;font:inherit;background:0 0;border:0;border-radius:4px;justify-content:center;align-items:center;gap:8px;text-decoration:none;display:inline-flex}.free-lab button:hover,.free-lab a:hover{background:#3b454e}.free-lab button:disabled{opacity:.35;cursor:default}.free-lab :focus-visible{outline-offset:2px;outline:2px solid #61c8e8}.free-lab svg{flex-shrink:0;width:20px;height:20px}.free-topbar{background:#20262b;border-bottom:1px solid #3c444b;align-items:center;gap:8px;height:54px;padding:0 16px;display:flex}.free-topbar .free-brand{background:#f8fcfa;border-radius:6px;flex-shrink:0;margin-right:12px;font-size:20px}.free-topbar .free-brand:hover{background:#edf4ef}.free-topbar h1{text-align:center;flex:1;margin:0;font-size:18px;font-weight:500}.free-topbar h1 small{color:#939fa8;margin-left:8px;font-size:11px}.free-workspace{grid-template-columns:minmax(0,1fr) 326px;height:calc(100% - 54px);display:grid}.free-sound-settings{position:relative}.free-sound-panel{z-index:20;background:#242d33;border:1px solid #59666f;border-radius:8px;width:min(286px,100vw - 24px);padding:18px;position:absolute;top:48px;right:0;box-shadow:0 12px 36px #10181b55}.free-sound-panel h2{margin:0 0 12px;font-size:16px}.free-sound-panel label{cursor:pointer;align-items:center;gap:10px;min-height:44px;display:flex}.free-sound-panel input[type=checkbox]{accent-color:#74d2e8;width:22px;height:22px}.free-sound-panel input[type=range]{accent-color:#74d2e8;width:100%;min-height:44px}.free-sound-panel output{margin-left:auto}.free-sound-panel p{color:#aebfc9;font-size:12px;line-height:1.7}.free-stage{min-width:0;position:relative;overflow:hidden}.free-canvas{touch-action:none;position:absolute;inset:0}.free-canvas canvas{touch-action:none;display:block}.free-empty{text-align:center;color:#9ba7b0;pointer-events:none;width:100%;font-size:16px;position:absolute;top:50%}.free-library{background:#242b30;border-left:1px solid #424a50;grid-template-columns:52px 1fr;min-height:0;display:grid}.free-library nav{background:#293137;flex-direction:column;gap:8px;padding-top:12px;display:flex}.free-library nav button{border-radius:0;font-size:12px}.free-library nav button[aria-pressed=true]{color:#68d3f4;background:#35414a;border-left:2px solid #64d3f8}.free-library-content{padding:12px;overflow:auto}.free-search{border:1px solid #49525b;border-radius:5px;align-items:center;gap:8px;min-height:44px;padding:0 8px;display:flex}.free-search input{color:#e4eaee;width:100%;min-width:0;font:inherit;background:0 0;border:0;outline:none}.free-search input::placeholder{color:#98a5af}.free-catalog{grid-template-columns:1fr 1fr;gap:8px;margin-top:12px;display:grid}.free-catalog[hidden]{display:none}.free-chemical-intro{color:#b8cad4;margin:12px 0;font-size:12px;line-height:1.8}.free-chemical-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}.free-chemical-card{background:#282f35;border:1px solid #46525b;border-radius:5px;min-width:0;overflow:hidden}.free-chemical-take{touch-action:none;cursor:grab;flex-direction:column;gap:5px;width:100%;padding:10px 4px}.free-chemical-take:active{cursor:grabbing}.free-chemical-take small,.free-chemical-note{color:#a8bac6;font-size:11px}.free-chemical-preview{pointer-events:none;width:90px;height:110px;display:block;position:relative}.free-chemical-facts{color:#c2d2da;padding:0 8px 8px;font-size:12px;line-height:1.6}.free-chemical-facts summary{cursor:pointer;color:#8dd8e9;align-items:center;min-height:44px;display:flex}.free-chemical-facts p{margin:5px 0}.free-chemical-preview img{object-fit:contain;width:90px;height:110px}.free-chemical-preview i{background:var(--chemical-color);opacity:.85;border-radius:3px 3px 9px 9px;width:40px;height:25px;position:absolute;bottom:10px;left:25px}.free-chemical-preview.is-solid i{background:radial-gradient(circle, #ffffff80 1px, transparent 2px) 0 0 / 7px 6px, var(--chemical-color)}.free-chemical-preview.is-solid img{height:88px}.free-chemical-preview.is-solid em{background:0 0;border:0;inset:auto -6px 0}.free-chemical-preview.is-solution i{opacity:.6;width:32px;height:38px;left:29px}.free-chemical-preview em{color:#d9f0f9;text-align:center;background:#213743eb;border:1px solid #82afbf;padding:3px 0;font-size:12px;font-style:normal;position:absolute;top:46px;left:10px;right:10px}.free-chemical-mass{border-top:1px solid #414d56;gap:5px;padding:8px;font-size:12px;display:grid}.free-chemical-mass>span:last-child{align-items:center;gap:5px;display:flex}.free-chemical-mass input{color:#e8f7ff;width:100%;min-width:0;min-height:44px;font:inherit;background:#1c252b;border:1px solid #667b89;border-radius:4px;padding:4px 6px;font-size:16px}.free-chemical-mass input:focus-visible{outline-offset:2px;outline:2px solid #70d7ef}.free-chemical-note,.free-chemical-error{padding:0 8px 8px;line-height:1.5;display:block}.free-chemical-error{color:#ffd0a0;font-size:11px}.free-chemical-ghost{z-index:100;pointer-events:none;color:#fff;background:#173b49ed;border:1px solid #71d2ea;border-radius:6px;padding:12px;position:fixed;top:0;left:0}.free-catalog button{background:#282f35;border:1px solid #3d464e;flex-direction:column;gap:2px;min-height:150px;padding:8px 3px}.free-catalog button:hover{border-color:#6ab5cf}.free-catalog img{object-fit:contain;pointer-events:none;width:90px;height:100px}.free-catalog small{color:#a2b1bd;font-size:11px}.free-library-note{color:#a2adb7;margin:18px 0;font-size:12px;line-height:1.8}.free-library details{color:#a7b3bd;font-size:12px;line-height:1.8}.free-library summary{cursor:pointer;min-height:44px;padding-top:12px}.free-view-tools{background:#20262beb;border:1px solid #454d55;border-radius:6px;align-items:center;gap:4px;padding:2px 10px;display:flex;position:absolute;bottom:20px;left:20px}.free-view-tools>svg{width:18px;margin:0 4px}.free-status{color:#aebdc5;pointer-events:none;text-align:center;margin:0;font-size:12px;position:absolute;bottom:20px;left:330px;right:20px}.free-help,.free-confirm{background:#222a30f5;border:1px solid #4a5964;border-radius:6px;width:258px;padding:16px;position:absolute;top:18px;right:18px;box-shadow:0 8px 24px #0002}.free-dose-anchor{z-index:2;width:max-content;position:absolute;top:0;left:0}.free-dose{color:#f1ab75;font-variant-numeric:tabular-nums;background:#30373ded;border-radius:24px;align-items:center;display:flex}.free-dose input{width:66px;height:44px;color:inherit;font:inherit;text-align:center;appearance:textfield;background:0 0;border:0;border-bottom:1px solid #f1ab7555;padding:0 3px}.free-dose input::-webkit-inner-spin-button{appearance:none;margin:0}.free-dose input::-webkit-outer-spin-button{appearance:none;margin:0}.free-dose button{border-radius:50%;font-size:22px}.free-dose span{padding-right:4px;font-size:12px}.free-support-controls{white-space:nowrap;background:#233139f2;border:1px solid #607580;border-radius:8px;gap:6px;padding:5px;display:flex;box-shadow:0 6px 16px #0002}.free-lab .free-support-controls button{color:#e3edf1;background:#344851;border:1px solid #526c78;border-radius:5px;min-width:88px;min-height:44px;padding:0 12px;font-size:14px}.free-lab .free-support-controls button:hover{background:#41616d}.free-lab .free-care-controls{white-space:normal;flex-wrap:wrap}.free-lab .free-care-controls output{flex-basis:100%;font-size:12px;line-height:1.5}.free-lift-controls input{accent-color:#82d2df;touch-action:none;width:112px;min-height:44px}.free-help{z-index:4;width:min(360px,100% - 36px);line-height:1.9;left:auto;right:18px}.free-help h2{font-size:17px}.free-help button,.free-confirm button{border:1px solid #596875;padding:0 14px}.free-confirm{z-index:5;width:310px;top:40%;left:50%;transform:translate(-50%,-50%)}.free-confirm button{margin-right:8px}@media (max-width:1000px){.free-workspace{grid-template-columns:minmax(0,1fr) 245px}.free-library{grid-template-columns:42px 1fr}.free-library-content{padding:8px}.free-catalog img{width:70px;height:80px}.free-catalog button{min-height:128px}.free-topbar button span,.free-topbar a span:not(.brand-logo){display:none}.free-status{text-align:left;bottom:78px;left:20px}.free-topbar{gap:2px;padding:0 8px}}@media (max-width:600px){.free-sound-panel{position:fixed;top:54px;right:8px}.free-workspace{grid-template-columns:minmax(0,1fr) 178px}.free-library{grid-template-columns:1fr}.free-library nav{flex-direction:row;justify-content:space-between;gap:0;padding:0}.free-library{grid-template-rows:44px minmax(0,1fr)}.free-catalog,.free-chemical-grid{grid-template-columns:1fr}.free-topbar h1,.free-topbar h1 small,.free-topbar .free-brand{display:none}.free-view-tools{gap:0;padding:0 4px;bottom:8px;left:6px}.free-view-tools>svg{display:none}.free-view-tools button{min-width:44px}.free-status{font-size:11px;left:8px;right:8px}.free-search{padding:0 4px}.free-search svg{display:none}.free-library-note{font-size:11px}}.free-reagent-controls{position:relative}.free-reagent-controls>button{background:#294d59;padding:0 14px}.free-reagent-panel{z-index:25;background:#202b32;border:1px solid #667780;border-radius:8px;width:min(280px,100vw - 40px);max-height:calc(100% - 90px);padding:16px;position:absolute;top:70px;left:16px;overflow:auto;box-shadow:0 10px 32px #0005}.free-reagent-sources summary,.free-reagent-sources a{color:#9fe2ed;cursor:pointer;align-items:center;min-height:44px;font-size:13px;display:flex}.free-reagent-panel label{gap:8px;display:grid}.free-reagent-panel header{justify-content:space-between;align-items:center;gap:8px;margin-bottom:10px;display:flex}.free-reagent-panel input,.free-reagent-panel select{color:#eff8fb;background:#303c44;border:1px solid #667780;border-radius:4px;width:100%;min-width:0;min-height:44px;padding:6px}.free-reagent-amount{grid-template-columns:1fr 115px;gap:8px;display:grid}.free-reagent-panel p{margin:8px 0;line-height:1.5}.free-reagent-panel small{color:#bccbd2;margin-top:10px;line-height:1.5;display:block}.free-reagent-panel>button{background:#17647a;width:100%}.free-sample-readout{white-space:pre-line;background:#202b32ed;border:1px solid #5f737f;border-radius:5px;padding:8px 12px;font-size:13px;line-height:1.5;display:block}.free-fuel-controls{color:#e2e9ed;background:#233139;border:1px solid #627983;border-radius:8px;width:min(220px,100vw - 170px);padding:12px}.free-fuel-controls label,.free-fuel-controls small{font-size:12px;display:block}.free-fuel-controls button{width:100%;min-height:44px;margin:6px 0}.free-fuel-controls .free-dose{border-radius:0;padding:0}.free-accident-notice{color:#e7edf0;background:#172026;border:1px solid #73564a;border-radius:10px;width:280px;padding:18px;box-shadow:0 12px 36px #0005}.free-accident-notice strong{color:#f2be9d;font-size:16px}.free-accident-notice p{margin:10px 0;font-size:13px;line-height:1.7}.free-accident-notice small{color:#b7c4ca;line-height:1.6;display:block}.free-accident-notice button{color:#ffe0ca;cursor:pointer;background:#302722;border:1px solid #8c6b58;border-radius:6px;width:100%;min-height:44px;margin-top:14px}.free-accident-notice button:hover{background:#45342a}.auth-controls{flex-shrink:0;align-items:center;gap:10px;display:flex}.auth-controls button{min-width:60px;min-height:44px;color:inherit;cursor:pointer;background:0 0;border:1px solid #0000;border-radius:6px;padding:0 14px;font-size:14px}.auth-controls button:hover:not(:disabled){background:currentColor}@supports (color:color-mix(in lab, red, red)){.auth-controls button:hover:not(:disabled){background:color-mix(in srgb, currentColor 7%, transparent)}}.auth-controls button:hover:not(:disabled){border-color:currentColor}@supports (color:color-mix(in lab, red, red)){.auth-controls button:hover:not(:disabled){border-color:color-mix(in srgb, currentColor 16%, transparent)}}.auth-user-email{text-overflow:ellipsis;white-space:nowrap;max-width:180px;font-size:14px;overflow:hidden}.auth-controls .auth-account-entry{align-items:center;gap:8px;display:flex}.auth-account-caption{color:inherit;font-size:13px}.auth-forgot{justify-content:flex-end;display:flex}.account-text-button{min-width:44px;min-height:44px;color:var(--brand-600);cursor:pointer;background:0 0;border:0;padding:8px;font-size:13px}.account-text-button:hover:not(:disabled){text-decoration:underline}.account-scope .dialog{width:min(520px,100vw - 32px)}.account-email{overflow-wrap:anywhere;margin-bottom:16px}.account-sections{background:var(--bg-canvas);border-radius:8px;grid-template-columns:1fr 1fr;gap:4px;margin-bottom:20px;padding:4px;display:grid}.account-sections button{min-height:44px;color:var(--text-secondary);cursor:pointer;background:0 0;border:0;border-radius:6px}.account-sections button[aria-pressed=true]{color:var(--brand-600);background:#fff;font-weight:600;box-shadow:0 1px 4px #24352e14}.account-device-heading,.account-device-title{justify-content:space-between;align-items:center;gap:8px;display:flex}.account-device-heading p{font-size:14px;font-weight:600}.account-device-list{gap:10px;margin:16px 0;padding:0;list-style:none;display:grid}.account-device-list li{border:1px solid var(--border);border-radius:8px;padding:12px 14px}.account-device-title strong{overflow-wrap:anywhere;font-size:14px}.account-current{color:var(--brand-600);background:var(--brand-100);border-radius:4px;flex-shrink:0;padding:5px 8px;font-size:12px}.account-device-list dl{color:var(--text-secondary);gap:6px;margin:10px 0 0;font-size:12px;display:grid}.account-device-list dl div{grid-template-columns:64px 1fr;gap:8px;display:grid}.account-device-list dd{overflow-wrap:anywhere;margin:0}.account-other-button,.account-danger-button{border:1px solid var(--border);min-width:44px;min-height:44px;color:var(--text-primary);cursor:pointer;background:#fff;border-radius:6px;padding:8px 14px}.account-other-button{width:100%;margin:12px 0}.account-confirm{background:#fff9f7;border:1px solid #e5c8bf;border-radius:8px;margin-bottom:12px;padding:14px;font-size:14px}.account-confirm>p{margin-top:0}.account-confirm>div{justify-content:flex-end;gap:8px;margin-top:8px;display:flex}.account-danger-button{color:#9b3523;border-color:#bb5743}.account-success{background:var(--bg-canvas);border-radius:8px;padding:16px}.account-devices button:disabled{opacity:.6;cursor:not-allowed}@media (max-width:360px){.resource-topbar:has(.auth-account-entry) .wordmark{font-size:16px}.auth-controls .auth-account-entry{gap:0;min-width:44px}.account-device-title{flex-wrap:wrap}}.auth-modal-scope .dialog{border-radius:12px;width:min(420px,100vw - 32px);max-height:calc(100dvh - 32px);margin:auto;padding:0;box-shadow:0 24px 80px #102f3a26}.auth-modal-scope .dialog::backdrop{background:#152b386b}.auth-modal-scope .dialog-heading{border:0;padding:24px 28px 8px}.auth-modal-scope .dialog-heading h2{letter-spacing:-.3px;font-size:22px}.auth-modal-scope .dialog-body{margin:0;padding:0 28px 28px;line-height:1.5}.auth-intro{color:var(--text-secondary);margin:0 0 22px;font-size:14px}.auth-trial-offer{color:#244a5d;background:#f0f6f9;border:1px solid #d3e3eb;border-radius:8px;align-items:center;gap:18px;margin:4px 0 14px;padding:12px 18px;display:flex}.auth-trial-duration{border-right:1px solid #c9dce6;flex-shrink:0;padding-right:18px;font-size:13px}.auth-trial-duration strong{font-size:36px;font-weight:650;line-height:1}.auth-trial-offer>div>strong{font-size:15px;font-weight:600}.auth-trial-offer p{color:#526d7b;margin:6px 0 0;font-size:12px;line-height:1.7}.auth-modal-scope:has(.auth-trial-offer) .dialog{width:min(480px,100vw - 32px)}.auth-modal-scope:has(.auth-trial-offer) .auth-form{gap:8px}.auth-modal-scope:has(.auth-trial-offer) .auth-form>input{margin-bottom:4px}.auth-modal-scope:has(.auth-trial-offer) .auth-switch{margin-top:10px}.auth-switch{border-top:1px solid var(--border);color:var(--text-secondary);justify-content:center;align-items:center;gap:6px;margin-top:18px;padding-top:12px;font-size:14px;display:flex}.auth-switch button{min-height:44px;color:var(--brand-600);cursor:pointer;background:0 0;border:0;padding:0 4px}.auth-switch button:hover{text-decoration:underline}.auth-password-hint{color:var(--text-secondary);margin:-10px 0 4px;font-size:12px;line-height:1.6}.auth-modal-scope input::placeholder{color:var(--text-secondary);opacity:1}.auth-modal-scope button:focus-visible,.auth-modal-scope input:focus-visible,.auth-modal-scope select:focus-visible,.auth-controls button:focus-visible{outline:2px solid var(--brand-600);outline-offset:3px}.auth-form{flex-direction:column;gap:10px;display:flex}.auth-form>label{font-size:14px;font-weight:600}.auth-form>input,.auth-email-row input,.auth-code-row input{border:1px solid var(--border);width:100%;min-width:0;min-height:48px;color:var(--text-primary);background:#fff;border-radius:6px;padding:11px 14px}.auth-form>input{margin-bottom:10px}.auth-email-row{grid-template-columns:minmax(0,1fr) 116px;display:grid}.auth-email-row input{border-radius:6px 0 0 6px}.auth-email-row select{border:1px solid var(--border);width:100%;min-width:0;min-height:48px;color:var(--text-primary);font:inherit;cursor:pointer;background:#f4f7f7;border-left:0;border-radius:0 6px 6px 0;padding:10px 8px;font-size:14px}.auth-email-row :disabled{opacity:.6;cursor:not-allowed}.auth-email-hint{color:var(--text-secondary);margin:0 0 6px;font-size:12px;line-height:1.6}.auth-code-row{grid-template-columns:minmax(0,1fr) 128px;gap:10px;display:grid}.auth-send{border:1px solid var(--brand-600);min-height:48px;color:var(--brand-600);cursor:pointer;background:#fff;border-radius:6px;font-size:14px}.auth-form .auth-remember{min-height:44px;color:var(--text-secondary);cursor:pointer;align-items:center;gap:8px;font-size:13px;font-weight:400;display:flex}.auth-remember input{width:18px;height:18px;accent-color:var(--brand-600)}.auth-submit{background:var(--brand-600);color:#fff;cursor:pointer;border:0;border-radius:6px;width:100%;min-height:48px;font-weight:650;display:block}.auth-submit:hover:not(:disabled){background:var(--brand-hover)}.auth-form button:disabled,.auth-controls button:disabled{opacity:.6;cursor:not-allowed}.auth-error{color:#a52d2d;margin:0;font-size:13px;line-height:1.7}.auth-message{color:#087882;margin:0;font-size:13px;line-height:1.7}.auth-footnote{color:var(--text-muted);margin:6px 0 0;font-size:12px;line-height:1.7}.auth-access-page{background:#f4f7f7;min-height:100dvh}.auth-access-page>header{border-bottom:1px solid var(--border);background:#fff;justify-content:space-between;align-items:center;height:72px;padding:0 32px;display:flex}.auth-access-panel{border:1px solid var(--border);background:#fff;border-radius:12px;width:min(480px,100% - 32px);margin:100px auto 0;padding:36px}.auth-access-eyebrow{color:var(--brand-600);font-size:13px}.auth-access-panel h1{margin:14px 0;font-size:25px}.auth-access-panel p{color:var(--text-secondary);margin:0 0 26px;font-size:14px;line-height:1.8}.auth-back{min-height:44px;color:var(--text-secondary);justify-content:center;align-items:center;margin-top:12px;font-size:14px;display:flex}.free-topbar .auth-controls{gap:6px}.free-topbar .auth-user-email{color:#d5e2e6;max-width:120px}.free-topbar .auth-controls button{color:#e8f4f6;background:0 0;border-color:#0000;padding-inline:12px}.lab-header .auth-user-email{max-width:120px}@media (max-width:767px){.resource-topbar .resource-subject{display:none}.resource-topbar{gap:12px}.resource-topbar>.auth-controls{margin-left:auto}.resource-topbar>a:not(.wordmark){font-size:13px}.auth-controls{gap:4px}.auth-controls button{padding-inline:12px}.auth-user-email{max-width:100px}.auth-access-page>header{padding-inline:16px}.auth-access-panel{margin-top:48px;padding:24px}}@media (max-width:360px){.auth-modal-scope .dialog-body{padding-inline:20px}.auth-code-row{grid-template-columns:minmax(0,1fr) 112px}}.auth-controls .auth-subscription-button{color:var(--brand-600);background:var(--brand-100);white-space:nowrap;border-color:#c8e1e3}.auth-controls .auth-subscription-button:hover{border-color:var(--brand-600);background:#d6ebec}.free-topbar .auth-controls .auth-subscription-button{color:#dcf3f3;background:#204347;border-color:#426469}.subscription-scope .dialog{border-radius:12px;width:min(540px,100vw - 32px);max-height:calc(100dvh - 32px);margin:auto;padding:0;box-shadow:0 24px 80px #102f3a26}.subscription-scope .dialog::backdrop{background:#152b386b}.subscription-scope .dialog-heading{padding:24px 28px 8px}.subscription-scope .dialog-heading h2{letter-spacing:-.3px;font-size:22px}.subscription-scope .dialog-body{margin:0;padding:0 28px 28px;line-height:1.5}.subscription-intro{color:var(--text-secondary);margin:0 0 22px;font-size:14px}.subscription-account{flex-wrap:wrap;gap:4px 16px;margin-bottom:24px;font-size:13px;display:flex}.subscription-account>:first-child{color:var(--text-secondary);flex-shrink:0}.subscription-account>:last-child{color:var(--text-primary);overflow-wrap:anywhere;min-width:0}.subscription-plans{border:0;min-width:0;margin:0;padding:0}.subscription-plans legend{color:var(--text-primary);margin-bottom:12px;font-size:14px;font-weight:600}.subscription-plan-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.subscription-plan{border:1px solid var(--border);background:var(--bg-surface);color:var(--text-primary);cursor:pointer;border-radius:8px;flex-direction:column;gap:14px;padding:20px 18px;display:flex;position:relative}.subscription-plan:hover{border-color:var(--brand-600)}.subscription-plan:has(input:checked){border-color:var(--brand-600);box-shadow:inset 0 0 0 1px var(--brand-600);background:#f0f8f8}.subscription-plan:has(input:focus-visible){outline:2px solid var(--brand-600);outline-offset:3px}.subscription-plan:has(input:disabled){cursor:not-allowed}.subscription-plan:has(input:disabled):not(:has(input:checked)){border-color:var(--border);background:var(--bg-surface)}.subscription-plan:has(input:disabled):not(:has(input:checked)) .subscription-plan-note{color:var(--brand-600);font-weight:650}.subscription-plan input{width:18px;height:18px;accent-color:var(--brand-600);position:absolute;top:20px;right:18px}.subscription-plan-heading{flex-direction:column;gap:4px;padding-right:24px;display:flex}.subscription-plan-heading strong{font-size:16px;font-weight:650}.subscription-plan-heading>span,.subscription-plan-note{color:var(--text-secondary);font-size:12px}.subscription-price{font-variant-numeric:tabular-nums;align-items:baseline;gap:3px;display:flex}.subscription-price>span{font-size:17px}.subscription-price strong{letter-spacing:-1px;font-size:36px;font-weight:650;line-height:1.2}.subscription-summary{color:var(--text-primary);justify-content:space-between;align-items:center;gap:12px;margin:24px 0 18px;display:flex}.subscription-summary>div{gap:4px;font-size:14px;display:grid}.subscription-summary small{color:var(--text-secondary);font-size:12px}.subscription-summary>strong{color:var(--brand-600);font-variant-numeric:tabular-nums;font-size:26px}.subscription-payment-button{border:1px solid var(--border);width:100%;min-height:48px;color:var(--text-secondary);cursor:not-allowed;background:#edf2f3;border-radius:6px;font-size:14px;font-weight:600}.subscription-notice{color:var(--text-secondary);margin:12px 0 0;font-size:12px;line-height:1.7}.subscription-payment-button:not(:disabled){background:var(--brand-600);color:#fff;cursor:pointer}.membership-gate{min-height:100dvh;position:relative}.membership-gate [inert]{pointer-events:none;-webkit-user-select:none;user-select:none}.membership-overlay{z-index:50;color:var(--text-primary);background:#f7fafbed;flex-direction:column;justify-content:center;align-items:center;gap:18px;padding:24px;display:flex;position:absolute;inset:0}.membership-overlay button,.membership-overlay a,.membership-orders button,.membership-orders a,.membership-payment-result button,.membership-payment-result a{justify-content:center;align-items:center;min-width:44px;min-height:44px;padding:10px 16px;display:inline-flex}.membership-orders ul{padding:0;list-style:none}.membership-orders li{border-bottom:1px solid var(--border);overflow-wrap:anywhere;flex-wrap:wrap;gap:12px;padding:16px 0;display:flex}.membership-orders time,.membership-orders li>span:last-of-type{width:100%;color:var(--text-secondary);font-size:12px}@media (max-width:1100px){:is(.auth-controls:has(.auth-subscription-button) .auth-user-email,.resource-topbar:has(.auth-subscription-button) .resource-edition,.resource-topbar:has(.auth-subscription-button) .resource-teacher){display:none}.resource-topbar:has(.auth-subscription-button)>.auth-controls{margin-left:auto}}@media (max-width:480px){.resource-topbar:has(.auth-subscription-button){gap:8px;padding-inline:12px}.resource-topbar:has(.auth-subscription-button) .wordmark{font-size:20px}.auth-controls:has(.auth-subscription-button) button{padding-inline:6px;font-size:13px}.subscription-scope .dialog-heading{padding:20px 20px 8px}.subscription-scope .dialog-body{padding:0 20px 20px}.subscription-plan-grid{grid-template-columns:1fr;gap:10px}.subscription-plan{padding:16px;grid-template-columns:1fr auto;gap:8px 12px;padding-right:46px;display:grid}.subscription-plan input{top:18px;right:16px}.subscription-plan-heading{padding-right:0}.subscription-price strong{font-size:30px}.subscription-plan-note{grid-column:1/-1}}@media (max-width:767px){.lab-header-actions:has(.auth-subscription-button){flex-wrap:wrap;justify-content:flex-end;gap:4px;width:100%;min-width:0}}@media (max-width:360px){.resource-topbar:has(.auth-subscription-button) .wordmark{font-size:18px}.auth-controls:has(.auth-subscription-button) button{font-size:12px}}.account-vip-badge{color:#69410b;letter-spacing:.035em;white-space:nowrap;vertical-align:middle;background:linear-gradient(135deg,#fff2be 0%,#efc567 48%,#d8a03c 100%);border:1px solid #d4a145;border-radius:8px 3px;flex-shrink:0;justify-content:center;align-items:center;gap:5px;min-width:56px;min-height:25px;padding:3px 8px 3px 6px;font-size:12px;font-weight:800;line-height:1.3;display:inline-flex;position:relative;overflow:hidden;box-shadow:inset 0 1px #fff9df,inset 0 -1px #b479282e,0 2px 5px #271a071c}.account-vip-badge[data-kind=trial]{background:linear-gradient(135deg,#fff7da,#efd29a);border-color:#ccb27a}.account-vip-emblem{filter:drop-shadow(0 1px #fff4ca);flex-shrink:0;width:15px;height:15px}.account-vip-label{text-shadow:0 1px #fff1bd;font-style:italic;font-weight:850}.account-vip-badge:after{content:"";pointer-events:none;background:linear-gradient(90deg,#0000,#ffffff85,#0000);width:30%;position:absolute;inset:-30% auto -30% 0;transform:translate(-200%)skew(-20deg)}@media (prefers-reduced-motion:no-preference){.account-menu summary:hover .account-vip-badge:after,.auth-account-entry:hover .account-vip-badge:after{transition:transform .6s;transform:translate(450%)skew(-20deg)}}.auth-controls .auth-account-entry:has(.account-vip-badge){border-color:#b99b5759}.free-topbar .auth-account-entry .account-vip-badge{display:inline-flex}.account-vip-summary{color:#fff;background:#193b43;border:1px solid #b69a5d;border-radius:10px;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:16px;margin:0 0 20px;padding:20px;display:grid}.account-vip-summary>.account-vip-badge{min-width:58px;min-height:42px;font-size:14px}.account-vip-summary>div{gap:5px;min-width:0;display:grid}.account-vip-summary>div>strong{color:#f9dea4;font-size:20px}.account-vip-summary>div>span{color:#e4edef;font-size:13px}.account-vip-summary time{color:#e4edef;word-break:keep-all;grid-column:1/-1;font-size:12px;line-height:1.6}@media (max-width:480px){.account-vip-summary{align-items:flex-start;gap:12px;padding:16px}.auth-controls .auth-account-entry:has(.account-vip-badge){gap:5px}}.auth-controls:has(.auth-membership-status){grid-template-columns:repeat(3,auto);gap:2px 8px;display:grid}.auth-membership-status{flex-wrap:wrap;grid-column:1/-1;justify-content:flex-end;gap:2px 8px;font-size:12px;line-height:1.4;display:flex}.auth-controls button{white-space:nowrap}.free-topbar:has(.auth-membership-status){height:72px}.free-lab:has(.auth-membership-status) .free-workspace{height:calc(100% - 72px)}@media (max-width:767px){.auth-controls:has(.auth-membership-status){gap:2px 4px}.auth-membership-status{flex-direction:column;align-items:center;font-size:11px}.resource-workspace:has(.auth-membership-status){--resource-topbar-height:100px}.resource-topbar:has(.auth-membership-status){height:var(--resource-topbar-height)}.resource-workspace:has(.auth-membership-status) .resource-rail{top:var(--resource-topbar-height)}.free-lab:has(.auth-membership-status){flex-direction:column;display:flex}.free-topbar:has(.auth-membership-status){flex-wrap:wrap;flex-shrink:0;gap:0;height:auto;padding:4px}.free-topbar:has(.auth-membership-status)>.auth-controls{flex-basis:100%;grid-template-columns:repeat(3,max-content);justify-content:end;padding:4px 0}.free-topbar .auth-account-caption{display:inline}.free-lab:has(.auth-membership-status) .free-workspace{flex:1;height:auto;min-height:0}}@media (max-width:380px){.resource-workspace:has(.account-vip-badge){--resource-topbar-height:140px}.resource-topbar:has(.account-vip-badge){flex-wrap:wrap;align-content:center;gap:4px}.resource-topbar:has(.account-vip-badge)>.auth-controls{flex-basis:100%;grid-template-columns:repeat(3,max-content);justify-content:end}}.auth-access-panel>.auth-controls,.membership-overlay-panel>.auth-controls{flex-wrap:wrap;justify-content:center;max-width:100%}.auth-access-panel .auth-user-email,.membership-overlay .auth-user-email{display:none}.auth-access-panel .auth-controls button,.membership-overlay .auth-controls button{white-space:nowrap;flex-shrink:0}.membership-overlay:has(.membership-overlay-panel){background:#152b387a;overflow-y:auto}.membership-overlay-panel{color:#19343a;text-align:center;background:#fff;border:1px solid #d7e1e3;border-radius:12px;flex-direction:column;align-items:center;gap:18px;width:min(480px,100%);padding:28px;display:flex;box-shadow:0 16px 48px #102f3a26}.membership-overlay-panel h1{margin:0;font-size:24px}.membership-overlay-panel p{margin:0;line-height:1.7}@media (max-width:480px){.membership-overlay-panel{padding:24px 16px}}.omni-root{color:#243c33;background:#f3f6f4;min-height:100dvh}.omni-header{background:#fff;border-bottom:1px solid #dce5df;align-items:center;gap:28px;height:80px;padding:0 32px;display:flex}.omni-header .brand-logo{width:168px}.omni-header-label{color:#708479;border-left:1px solid #dce5df;padding-left:28px;font-size:14px}.omni-header-actions{align-items:center;gap:12px;margin-left:auto;display:flex}.omni-header-actions>a{align-items:center;min-height:44px;padding:0 8px;display:flex}.omni-admin-name{color:#4f685b;font-size:14px}.omni-root button,.omni-root select,.omni-root input{min-height:44px;color:inherit;background:#fff;border:1px solid #cfddd3;border-radius:8px}.omni-root button{cursor:pointer;padding:10px 18px;font-size:14px;font-weight:600}.omni-root button:hover:not(:disabled){background:#edf4ef;border-color:#769b87}.omni-root button:disabled{opacity:.5;cursor:not-allowed}.omni-root button.omni-primary{color:#fff;background:#287257;border-color:#287257}.omni-root button.omni-primary:hover:not(:disabled){background:#205d47}.omni-root input,.omni-root select{width:100%;padding:10px 12px;font-size:15px}.omni-root label{flex-direction:column;gap:8px;font-size:14px;font-weight:600;display:flex}.omni-eyebrow{color:#789184;letter-spacing:.06em;font-size:12px}.omni-access-area{padding:64px 20px}.omni-access{background:#fff;border:1px solid #dce5df;border-radius:16px;width:min(100%,460px);margin:0 auto;padding:36px;box-shadow:0 12px 44px #25443208}.omni-access h1{letter-spacing:-.03em;margin:12px 0 8px;font-size:27px}.omni-access>p{color:#748679;margin-bottom:28px;font-size:14px}.omni-access form{flex-direction:column;gap:20px;display:flex}.omni-notice{color:#466747;background:#f0f6ee;border-radius:8px;margin:20px 0;padding:12px 16px;font-size:14px}.omni-error{color:#a23d32;overflow-wrap:anywhere;background:#fff5f2;border-radius:8px;padding:12px;font-size:14px}.omni-global-error{max-width:760px;margin:0 auto 20px}.omni-hint{color:#75857b;margin:12px 0;font-size:13px;line-height:1.8}.omni-access .omni-hint{margin:-10px 0 -6px}.omni-workspace{grid-template-columns:204px minmax(0,1fr);min-height:calc(100dvh - 80px);display:grid}.omni-sidebar{background:#fafcfb;border-right:1px solid #dce5df;padding:32px 16px}.omni-sidebar>.omni-eyebrow{margin-left:16px}.omni-sidebar nav{flex-direction:column;gap:8px;margin-top:20px;display:flex}.omni-sidebar nav button{text-align:left;color:#677c70;background:0 0;border-color:#0000;align-items:center;gap:14px;min-height:48px;display:flex}.omni-sidebar nav button[aria-current]{color:#216748;background:#e4efe7}.omni-nav-dot{background:#b7c9bd;border-radius:50%;width:6px;height:6px}button[aria-current] .omni-nav-dot{background:#287257}.omni-sidebar>p{color:#8a9d90;margin:48px 16px 0;font-size:12px;line-height:1.9}.omni-content{width:100%;min-width:0;max-width:1600px;margin:0 auto;padding:32px}.omni-page-heading{justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px;display:flex}.omni-page-heading h1{margin:6px 0 0;font-size:28px}.omni-metrics{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:24px;display:grid}.omni-metric{background:#fff;border:1px solid #dce5df;border-radius:12px;padding:22px 24px}.omni-metric h2{color:#6c8074;margin:0 0 14px;font-size:14px;font-weight:500}.omni-metric strong{letter-spacing:-.04em;font-variant-numeric:tabular-nums;font-size:32px;line-height:1.1;display:block}.omni-metric p{color:#8a9b90;margin:12px 0 0;font-size:12px}.omni-panel{background:#fff;border:1px solid #dce5df;border-radius:12px;min-width:0;margin-bottom:20px;padding:24px}.omni-panel-heading{justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.omni-panel-heading h2{margin:0;font-size:18px}.omni-panel-heading p{color:#83958a;margin:6px 0 0;font-size:12px}.omni-range{flex-shrink:0;width:120px}.omni-chart-legend{color:#708479;flex-wrap:wrap;gap:20px;margin:24px 0 12px;font-size:12px;display:flex}.omni-chart-legend span{align-items:center;gap:6px;display:flex}.omni-chart-legend i{border-radius:2px;width:8px;height:8px}.omni-active-dot,.omni-chart-active{background:#3f8966}.omni-new-dot,.omni-chart-new{background:#b7d5a9}.omni-chart{background:repeating-linear-gradient(0deg,#0000 0 39px,#edf2ee 39px 40px);gap:2px;height:184px;padding:12px 0 32px;display:flex;overflow-x:auto}.omni-chart-day{flex-direction:column;flex:1;min-width:14px;display:flex;position:relative}.omni-chart-bars{flex:1;justify-content:center;align-items:flex-end;gap:2px;display:flex}.omni-chart-bars span{border-radius:2px 2px 0 0;width:34%;max-width:14px}.omni-chart-unknown{background:repeating-linear-gradient(135deg,#eff3f0 0 3px,#dde7df 3px 4px)}.omni-chart-day small{text-align:center;white-space:nowrap;color:#84988a;width:40px;height:24px;padding-top:6px;font-size:9px;position:absolute;bottom:-24px;left:50%;transform:translate(-50%)}.omni-chart-day:first-child small{text-align:left;left:0;transform:none}.omni-chart-day:last-child small{text-align:right;left:auto;right:0;transform:none}.omni-chart-scroll-hint{display:none}.omni-table-scroll{width:100%;overflow:auto}.omni-root table{border-collapse:collapse;text-align:left;font-variant-numeric:tabular-nums;width:100%;font-size:13px}.omni-root th{color:#6c8074;white-space:nowrap;background:#f5f8f5;font-weight:600}.omni-root th,.omni-root td{vertical-align:middle;white-space:nowrap;border-bottom:1px solid #edf1ee;padding:14px 16px}.omni-root tbody tr:hover{background:#fbfdfb}.omni-trend-table{max-height:240px;margin-top:16px}.omni-trend-table thead{position:sticky;top:0}.omni-user-id{color:#9aaa9e;margin-top:3px;font-size:10px;display:block}.omni-user-email{font-weight:500}.omni-order-id{overflow-wrap:anywhere;max-width:240px;white-space:normal!important}.omni-badge{color:#7b8b80;background:#f0f3f0;border-radius:6px;padding:3px 10px;font-size:12px;display:inline-flex}.omni-badge-active,.omni-badge-paid{color:#287257;background:#e5f1e8}.omni-badge-expired,.omni-badge-refunded{color:#9b7252;background:#faf1e7}.omni-search{flex-wrap:wrap;align-items:flex-end;gap:12px;margin-top:20px;display:flex}.omni-search label:first-child{flex:1;min-width:160px}.omni-search label:nth-child(2){width:160px}.omni-search button{min-width:76px}.omni-empty{text-align:center;padding:48px 20px}.omni-empty-mark{color:#b7c9bd;font-size:36px}.omni-empty h2{margin:8px 0;font-size:18px}.omni-empty p{color:#809184;font-size:13px}.omni-loading{text-align:center;color:#789184;padding:60px 20px}.omni-pagination{color:#789184;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding-top:20px;font-size:12px;display:flex}.omni-pagination>div{gap:8px;display:flex}.omni-sr-only{clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}@media (max-width:900px){.omni-workspace{grid-template-columns:160px minmax(0,1fr)}.omni-content{padding:24px 20px}.omni-metric{padding:18px 16px}.omni-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:620px){.omni-chart-scroll-hint{display:block}.omni-header{flex-wrap:wrap;gap:12px;height:auto;min-height:72px;padding:12px 16px}.omni-header .brand-logo{width:132px}.omni-header-label{padding-left:12px;font-size:12px}.omni-header-actions{flex-wrap:wrap;gap:8px}.omni-header-actions button{padding:10px 12px}.omni-admin-name{display:none}.omni-access-area{padding:28px 16px}.omni-access{padding:28px 24px}.omni-workspace{display:block}.omni-sidebar{border-bottom:1px solid #dce5df;border-right:0;padding:12px 16px}.omni-sidebar>span,.omni-sidebar>p{display:none}.omni-sidebar nav{grid-template-columns:repeat(2,minmax(0,1fr));margin:0;display:grid}.omni-sidebar nav button{justify-content:center;padding:10px 8px}.omni-content{padding:24px 16px}.omni-page-heading h1{font-size:24px}.omni-metrics{gap:10px}.omni-metric{padding:18px 14px}.omni-metric strong{font-size:28px}.omni-panel{padding:18px 14px}.omni-panel-heading{flex-direction:column}.omni-range{width:100%}.omni-chart-legend{gap:12px}.omni-search label,.omni-search label:nth-child(2){flex-basis:100%;width:100%}.omni-search button{flex:1}}:root{--bg-page:#f5f7fa;--bg-canvas:#edf1f5;--text-primary:#182630;--text-secondary:#51616e;--text-muted:#61717d;--brand-600:#0877ad;--brand-hover:#075c87;--brand-100:#e6f3fc;--border:#dce3e9;--divider:#edf0f3;--shadow-panel:none;--radius-sm:5px;--radius-md:8px;--radius-lg:10px}.site-header{z-index:30;color:#d2dce3;background:#10191f;border-bottom:1px solid #2d373e;flex-shrink:0;height:68px;position:relative}.header-inner{gap:28px;max-width:1500px;height:100%;margin:auto;padding:0 40px}.site-header .wordmark{min-height:44px;margin-right:auto;font-size:26px}.site-header .brand-logo{width:164px}.site-header .brand-logo img,.lab-header .brand-logo img{filter:grayscale()brightness(0)invert()}.site-header nav{gap:34px;margin-inline:auto}.site-header nav a{border-bottom-width:2px;border-radius:0;min-height:44px;padding-inline:8px;font-size:15px;font-weight:500}.site-header nav a:hover{color:#fff;background:0 0}.site-header nav a[aria-current]{color:#42b7f0;border-color:#27a6e7}.site-header .header-search{color:#d2dce3;justify-content:center;width:44px;min-height:44px;margin-left:auto}.site-header .auth-controls{margin:0}.site-header .auth-login-button{color:#17252f;background:#f7fafc;border-color:#f7fafc;border-radius:25px;min-width:86px;min-height:44px}.site-header .auth-controls .auth-login-button:hover{color:#17252f;background:#dcebf4;border-color:#dcebf4}.account-menu{color:#dce7ee;flex-shrink:0;font-size:14px;position:relative}.account-menu summary{cursor:pointer;border:1px solid #53606a;border-radius:24px;justify-content:center;align-items:center;gap:10px;min-height:44px;padding:0 14px;list-style:none;display:flex}.account-menu summary::-webkit-details-marker{display:none}.account-menu-chevron{width:14px;height:14px;transform:rotate(90deg)}.account-menu summary:hover,.account-menu[open] summary{background:#29363f}.account-menu-panel{border:1px solid var(--border);width:min(306px,100vw - 32px);color:var(--text-primary);z-index:50;background:#fff;border-radius:8px;padding:12px;position:absolute;top:calc(100% + 12px);right:0;box-shadow:0 12px 40px #07131d30}.account-menu-panel .auth-controls{white-space:normal;flex-direction:column;align-items:stretch;gap:8px;display:flex}.account-menu-panel .auth-controls button{color:#263b49;background:#f4f7fa;border-radius:4px;justify-content:flex-start;width:100%;min-height:44px}.account-menu-panel .auth-controls button:hover{color:#075c87;background:#e6f3fc}.account-menu-panel .auth-account-entry{flex-wrap:wrap;order:-1}.account-menu-panel .auth-user-email{max-width:240px}.account-menu-panel .auth-membership-status{color:#536978;text-align:left;width:auto;padding:8px}.resource-workspace{--resource-soft:#f3f6f8;--resource-hover:#edf3f7;--resource-topbar-height:68px;background:#f3f6f8;min-width:1100px}.resource-main{margin-left:0}.resource-browser{grid-template-columns:248px minmax(0,1fr);max-width:1680px;margin:auto}.resource-chapters{overscroll-behavior:contain;background:#fff;border-right:1px solid #e3e9ee;height:100dvh;padding:28px 16px;top:0}.resource-chapters h2{color:#627583;margin:0 10px 22px;font-size:14px;font-weight:500}.chapter-edition{background:#f0f5f8;border-radius:8px;flex-direction:row;justify-content:flex-start;align-items:center;gap:12px;margin:0 0 20px;padding:16px 13px}.chapter-edition>svg{color:#267496;flex-shrink:0;width:25px;height:30px}.chapter-edition>div{gap:6px;display:grid}.chapter-edition strong{font-size:16px;font-weight:650}.chapter-edition span{color:#627583;font-size:12px}.chapter-all{min-height:46px;font-size:14px}.chapter-all>span{background:#fff9;border-radius:4px;padding:2px 7px;font-size:12px}.chapter-volume{margin-top:14px;padding-top:6px}.chapter-volume-button{min-height:44px;font-size:14px}.chapter-button{gap:4px;min-height:62px;margin:2px 0;padding:9px 10px}.chapter-button>span:first-child{gap:2px;font-size:14px;line-height:1.5}.chapter-button small{color:#687e8e;font-size:11px}.chapter-button .chapter-count{font-size:12px}.chapter-button svg{width:12px}.resource-chapters button[aria-pressed=true]{color:#075c87;background:#e7f2fa;border-inline-start-color:#1685bb}.chapter-note{color:#6b7d89;line-height:1.7}.resource-content{padding:24px 32px 64px}.resource-heading{color:#f4f8fb;background:linear-gradient(90deg,#12232d 0%,#12232de8 45%,#142630b3 100%),url(/images/ui/immersive-lab-hero.webp) right 55%/cover;border:1px solid #233945;border-radius:10px;gap:24px;min-height:132px;margin-bottom:16px;padding:18px 30px;position:relative}.resource-eyebrow{color:#b0c5d2;letter-spacing:.1em;margin-bottom:6px;font-size:12px;display:block}.resource-heading h1{letter-spacing:-.035em;font-size:30px;font-weight:650;line-height:1.2}.resource-heading p{color:#b8cbd6;margin-top:10px;font-size:14px;line-height:1.6}.resource-heading .search-wrap{width:min(330px,41%)}.resource-heading .search-wrap input{color:#203440;background:#fff;border:1px solid #c5d4de;border-radius:7px;height:48px;font-size:14px;box-shadow:0 4px 18px #0617231a}.resource-heading .search-wrap input::placeholder{color:#617787}.resource-heading .search-wrap>svg{color:#567487;top:14px}.resource-heading .search-wrap input:focus-visible{outline-offset:3px;outline:3px solid #7fcaf2}.resource-filters{border-bottom:1px solid #dce5eb;padding:0 0 12px}.resource-filters .filter-row{gap:8px}.resource-filters .filter-row>span{margin-right:10px;font-size:13px;display:block}.resource-filters .button{color:#4b6373;border-radius:6px;min-height:44px;padding:9px 17px;font-size:14px}.resource-filters .button[aria-pressed=true]{color:#fff;background:#173e53;font-weight:500}.resource-filters .button:hover:not([aria-pressed=true]){color:#086998;background:#e3edf4}.resource-unit-select{display:none}.resource-results-heading{gap:14px;min-height:48px}.resource-results-heading h2{letter-spacing:-.025em;font-size:21px;font-weight:650}.resource-results-heading p,.resource-results-heading>span{color:#647a89;font-size:12px}.resource-results-heading button{text-underline-offset:4px;font-size:13px}.resource-results-heading button:hover{text-decoration:underline}.resource-content .experiment-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px 20px}.resource-content .experiment-volume-heading{gap:12px;margin-bottom:10px}.resource-content .experiment-volume-heading:after{content:"";background:#dde6ec;flex:1;height:1px;margin-left:4px}.resource-content .experiment-volume-heading h3{color:#3e586a;font-size:15px;font-weight:600}.resource-content .experiment-volume-heading span{color:#718493;font-size:12px}.resource-content .experiment-volumes{gap:40px}.resource-content .experiment-card{border-color:#e0e7ed;border-radius:10px;padding:7px 7px 0;box-shadow:0 2px 5px #17364804}.resource-content .experiment-card:hover,.resource-content .experiment-card:focus-within{border-color:#8ab6cf;box-shadow:0 8px 24px #1736480f}.resource-content .card-visual{border-radius:6px}.resource-content .card-visual .apparatus-image{aspect-ratio:1.8}.resource-content .card-visual .apparatus-stage{background:radial-gradient(at 52% 34%,#354b59,#0000 72%),linear-gradient(#182730 0% 81%,#42505a 82%,#23333e 100%)}.resource-content .apparatus-lineup{padding:16px 14px 22px}.resource-content .card-body{padding:17px 12px 12px}.resource-content .card-meta{color:#627889;margin-bottom:7px;font-size:12px;line-height:1.6}.resource-content .card-body h3{color:#1c3443;min-height:54px;margin:0 0 10px;font-size:18px;font-weight:600;line-height:1.5}.resource-content .card-body h3 a{align-items:flex-start;padding-block:4px}.resource-content .card-body h3 a:hover{color:#0877ad}.resource-content .card-bottom{border-top:0;gap:8px;min-height:44px}.resource-content .card-link{color:#215d7c;background:#eff6fa;border:1px solid #dce9f0;border-radius:5px;gap:16px;min-height:44px;padding:0 13px;font-size:13px}.resource-content .card-link:hover{background:#dcecf6;border-color:#b3d2e5}.resource-content .card-bottom .badge{color:#6a7e8c;background:0 0;padding:0;font-size:12px;font-weight:400}.resource-content .empty-state{background:#fff;border-radius:10px;padding-block:80px}.resource-content .empty-state h2{margin-top:18px;font-size:23px}.resource-content .recent-section{border-top:1px solid #dce5eb;margin-top:42px;padding-top:24px}.resource-content .recent-section h2{color:#3e586a;font-size:17px}.resource-content .recent-section>p{line-height:1.9}@media (prefers-reduced-motion:no-preference){.resource-content .experiment-card{transition:border-color .2s,box-shadow .2s,transform .2s}.resource-content .experiment-card:hover{transform:translateY(-3px)}.resource-content .apparatus-lineup{transition:transform .35s}.resource-content .experiment-card:hover .apparatus-lineup{transform:scale(1.035)}.resource-content .card-link svg{transition:transform .2s}.resource-content .card-link:hover svg{transform:translate(3px)}}.apparatus-stage{background:linear-gradient(#27353f,#162028 83%,#39464e 84%,#1a242b)}.apparatus-lineup{justify-content:center;align-items:flex-end;gap:10px;padding:18px 14px 22px;display:flex;position:absolute;inset:0}.apparatus-lineup img{object-fit:contain;object-position:bottom;filter:drop-shadow(0 8px 5px #060d135c);width:auto;position:relative}.page-container{max-width:1328px;padding:36px 40px 60px}.intro-grid{gap:48px;margin-bottom:40px}.intro-art{border-radius:6px}.intro-copy h1{letter-spacing:-.025em;font-size:clamp(28px,2.6vw,40px);line-height:1.4}.intro-art .apparatus-lineup{padding:50px 24px}.intro-copy .badge{border-radius:4px}.detail-panel{box-shadow:none;border-radius:6px}.detail-panel h2{font-size:19px}.apparatus-tags span{background:#edf2f6;border-radius:4px}.site-footer{max-width:1328px}.auth-dialog,.account-dialog{border-radius:10px}.breadcrumb a{min-width:44px}.account-saved-link{align-items:center;min-height:44px;display:inline-flex}@media (min-width:1600px){.resource-content .experiment-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}@media (max-width:1023px){.header-inner{gap:18px;padding-inline:24px}.site-header nav{gap:16px}.resource-browser{grid-template-columns:200px minmax(0,1fr)}.resource-content{padding-inline:22px}.resource-content .experiment-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.resource-heading{flex-direction:row}.resource-heading .search-wrap{width:48%}}@media (max-width:767px){.site-header{height:112px}.header-inner{flex-wrap:wrap;gap:0 12px;padding:8px 20px 0}.site-header .brand-logo{width:142px;height:44px}.site-header nav{order:3;justify-content:center;gap:24px;width:100%;height:52px}.site-header nav a{font-size:14px}.site-header .header-search{width:44px;margin-left:auto}.site-header .auth-login-button{min-width:66px}.account-menu summary{padding-inline:10px}.resource-main{margin:0}.resource-browser{display:block}.resource-chapters{display:none}.resource-content{padding:24px 16px 40px}.resource-heading{flex-direction:column;gap:16px;margin-bottom:8px}.resource-heading .search-wrap{width:100%}.resource-filters{gap:12px;padding-bottom:16px}.resource-filters .filter-row{gap:0}.resource-filters .button{padding:8px 9px;font-size:13px}.resource-unit-select{display:flex}.resource-results-heading{min-height:62px;padding-block:14px}.resource-results-heading h2{flex-basis:auto;font-size:18px}.resource-results-heading>span{display:none}.resource-content .experiment-grid{grid-template-columns:1fr;gap:18px}.resource-content .card-body h3{min-height:0;margin-bottom:10px;font-size:18px}.resource-content .card-meta{font-size:12px}.page-container{padding:24px 20px 40px}.intro-grid{gap:24px}.intro-art .apparatus-image{aspect-ratio:1.5}.site-footer{font-size:12px}}.home-page{color:#f4f7f9;background:#0e171d;min-width:1100px}.home-section{width:min(1320px,90%);margin-inline:auto}.home-hero{isolation:isolate;height:min(800px,100dvh - 68px);min-height:640px;position:relative;overflow:hidden}.home-hero-image{z-index:-2;object-fit:cover;object-position:right 65%;-webkit-mask-image:linear-gradient(90deg,#0000 16%,#0007 48%,#000 77%);mask-image:linear-gradient(90deg,#0000 16%,#0007 48%,#000 77%)}.home-hero:after{content:"";z-index:-1;background:linear-gradient(90deg,#0e171d 0%,#0e171d99 36%,#0000 75%);position:absolute;inset:0}.home-hero-copy{width:min(1320px,90%);margin-inline:auto;padding-top:clamp(106px,11vh,164px)}.home-kicker{letter-spacing:.12em;color:#afc2cf;margin:0 0 26px;font-size:14px;font-weight:500}.home-hero h1{letter-spacing:-.045em;margin:0 0 30px;font-size:clamp(60px,4.7vw,86px);font-weight:750;line-height:1.22}.home-hero h1 span{white-space:nowrap;display:block}.home-intro{color:#b2c1cb;text-wrap:pretty;max-width:590px;margin:0;font-size:15px;line-height:1.95}.home-actions{align-items:center;gap:18px;margin-top:36px;display:flex}.home-button{color:#eef5fa;cursor:pointer;background:#1a283080;border:1px solid #70818d;border-radius:30px;justify-content:center;align-items:center;gap:22px;min-height:52px;padding:0 28px;font-size:15px;font-weight:600;transition:background .2s,border-color .2s,transform .2s;display:inline-flex}.home-actions .home-button{min-width:168px}.home-button-primary{color:#15252e;background:#f7fafc;border-color:#f7fafc}.home-button:hover{background:#2b3e4b;border-color:#a1bbc9}.home-button-primary:hover{color:#14252f;background:#dfeef7;border-color:#dfeef7}.home-button:disabled{cursor:default}.home-button svg,.home-scroll-cue svg{transition:transform .2s}.home-button:hover:not(:disabled) svg{transform:translate(4px)}.home-button:active:not(:disabled){transform:translateY(1px)}.home-scroll-cue{color:#9ab0c0;letter-spacing:.1em;align-items:center;gap:20px;min-height:44px;font-size:12px;display:inline-flex;position:absolute;bottom:24px;left:max(5%,50% - 660px)}.home-scroll-cue svg{width:17px;height:17px;transform:rotate(90deg)}.home-scroll-cue:hover{color:#e2f3ff}.home-scroll-cue:hover svg{transform:translateY(4px)rotate(90deg)}.home-mission{padding:96px 0 104px;scroll-margin-top:36px}.home-mission-intro{margin-bottom:48px}.home-mission-intro .home-kicker{margin-bottom:20px}.home-mission h2{letter-spacing:-.04em;margin:0 0 22px;font-size:clamp(38px,3.1vw,52px);font-weight:650;line-height:1.35}.home-mission h2 span{color:#8dd1f4}.home-mission-intro>p:last-child{color:#a6b9c6;margin:0;font-size:17px;line-height:1.8}.home-commitments{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;display:grid}.home-commitments article{min-width:0}.home-commitment-image{aspect-ratio:8/5;background:#1a2830;border-radius:8px;overflow:hidden}.home-commitment-image img{object-fit:cover;width:100%;height:100%;display:block}.home-commitment-copy{padding:25px 0 0}.home-commitments h3{letter-spacing:-.025em;margin:0 0 13px;font-size:25px;font-weight:600}.home-commitments p{color:#a6b9c6;max-width:29em;margin:0;font-size:15px;line-height:1.85}.home-laboratory{border-top:1px solid #303e48;padding:80px 0 90px}.home-laboratory-heading{justify-content:space-between;align-items:center;gap:40px;margin-bottom:38px;display:flex}.home-laboratory-heading h2{letter-spacing:-.035em;margin:0 0 20px;font-size:40px;font-weight:600;line-height:1.4}.home-laboratory-heading p:last-child{color:#a8bdca;margin:0;font-size:14px;line-height:1.9}.home-laboratory-heading .home-button{flex-shrink:0}.home-preview-button{cursor:zoom-in;background:#1a262f;border:1px solid #3a4a55;border-radius:8px;width:100%;padding:0;display:block;position:relative;overflow:hidden}.home-preview-button>img{width:100%;height:auto;display:block}.home-preview-zoom{color:#e5f2f9;background:#0a151fe8;border:1px solid #688190;border-radius:25px;align-items:center;gap:10px;min-height:44px;padding:0 16px;font-size:13px;transition:background .2s;display:flex;position:absolute;bottom:20px;right:20px}.home-preview-button:hover .home-preview-zoom{background:#23526e}.home-preview-caption{color:#8fa8b9;justify-content:space-between;gap:20px;margin:14px 0 0;font-size:12px;display:flex}.home-lab-preview .dialog{color:#eef6fb;background:#14212a;border:1px solid #4c626f;border-radius:8px;width:min(1480px,94vw);max-width:94vw;padding:20px}.home-lab-preview .dialog-heading{padding:0 0 16px}.home-lab-preview .dialog-heading h2{font-size:18px}.home-lab-preview .dialog-body{padding:0}.home-lab-preview .dialog-body img{object-fit:contain;width:100%;height:auto;max-height:78dvh}.home-lab-preview .dialog button{color:#e7f3fa}.home-questions{border-top:1px solid #303e48;grid-template-columns:.9fr 1.2fr;gap:90px;padding:72px 0 100px;display:grid}.home-questions h2{letter-spacing:-.03em;margin:0 0 18px;font-size:34px;font-weight:600}.home-questions>div>p:last-child{color:#a6b9c5;font-size:14px}.home-questions details{border-bottom:1px solid #33414b}.home-questions summary{cursor:pointer;justify-content:space-between;align-items:center;gap:22px;min-height:70px;font-size:16px;list-style:none;display:flex}.home-questions summary::-webkit-details-marker{display:none}.home-questions summary svg{color:#91adbf;width:16px;transition:transform .2s}.home-questions details[open] summary svg{transform:rotate(90deg)}.home-questions details>p{color:#aebfc9;margin:0;padding:0 30px 24px 0;font-size:14px;line-height:1.95}.home-footer{color:#98adbc;border-top:1px solid #303e48;align-items:center;gap:28px;width:min(1320px,90%);margin:auto;padding:25px 0;font-size:13px;display:flex}.home-footer>:first-child{color:#e5eff5;font-size:19px;font-weight:700}.home-footer>a{align-items:center;gap:16px;min-height:44px;margin-left:auto;display:flex}@media (prefers-reduced-motion:no-preference){.home-hero-copy{animation:.75s ease-out both home-enter}[data-home-reveal][data-reveal=pending]{opacity:0;transform:translateY(20px)}[data-home-reveal][data-reveal=visible]{animation:.6s ease-out both home-enter}.home-preview-button>img{transition:transform .5s}.home-preview-button:hover>img{transform:scale(1.012)}.home-commitment-image img{transition:transform .65s}.home-commitments article:hover img{transform:scale(1.035)}.home-commitments article:nth-child(2)[data-reveal=visible]{animation-delay:.1s}.home-commitments article:nth-child(3)[data-reveal=visible]{animation-delay:.2s}html:has(.home-page){scroll-behavior:smooth}}@keyframes home-enter{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@media (max-width:1350px){.home-questions{gap:56px}.home-intro{max-width:560px}}.free-lab{--free-border:#384650;background:#18232b}.free-lab .site-header .header-inner{max-width:none;padding-inline:24px}.free-lab .site-header nav a{border-radius:0}.free-lab .site-header .wordmark:hover,.free-lab .site-header .header-search:hover{background:0 0}.free-lab .site-header .auth-login-button{color:#17252f;background:#f7fafc}.free-lab .free-topbar:has(.free-save-controls){background:#172129;border-color:#35414a;flex-wrap:nowrap;gap:6px;min-height:56px;padding-inline:18px}.free-topbar h1{text-align:left;color:#b4c4cf;white-space:nowrap;margin-left:16px;font-size:15px}.free-topbar>button,.free-topbar>a{padding-inline:10px;font-size:13px}.free-topbar>a{border:1px solid #3c4b56;margin-right:10px}.free-topbar .free-save-controls{border-left:1px solid #3c4b56;padding-left:12px}.free-topbar .free-save-controls button span,.free-topbar .free-save-controls a span{display:inline}.free-lab .free-save-dialog button[type=submit]{background:var(--brand-600);border-color:var(--brand-600)}.free-lab .free-save-dialog button[type=submit]:hover{background:var(--brand-hover)}.free-workspace{grid-template-columns:minmax(0,1fr) 292px}.free-stage{background:#18232b url(/images/ui/immersive-empty-bench.webp) bottom/cover no-repeat}.free-library{background:#1c272f;border-color:#394650;grid-template-rows:50px minmax(0,1fr);grid-template-columns:1fr;display:grid}.free-library nav{background:#1c272f;border-bottom:1px solid #394650;flex-direction:row;align-items:stretch;gap:0;padding:0 8px}.free-library nav button{border-bottom:2px solid #0000;flex:1;font-size:13px}.free-library nav button[aria-pressed=true]{color:#55bffa;background:0 0;border-bottom-color:#29a9ef;border-left:0}.free-library-content{padding:12px}.free-search{background:#172129;border-color:#43515c}.free-search input{min-height:44px}.free-catalog>button{background:#202d36;border-color:#3c4a55;border-radius:5px}.free-catalog>button:hover{background:#2b3e4b;border-color:#73a4c1}.free-catalog>button img{height:94px}.free-catalog>button small{color:#adbfc9}.lab-shell{background:#e7edf2}.lab-header{color:#e6edf3;background:#10191f;border-color:#34424c;min-height:68px;padding:8px 24px}.lab-header .wordmark{font-size:24px}.lab-header h1{font-size:18px}.lab-header .lab-back{color:#c5d2dc;border-color:#43515b}.lab-header-actions>button{color:#d5e0e8;background:0 0;border-color:#43515b}.lab-header-actions>button:hover{background:#2a3b47}.lab-workspace{gap:12px;padding:12px 14px 0}.lab-shell>.teacher-toolbar{border-radius:6px;gap:22px;margin-top:10px;padding:8px 18px}@media (min-width:1024px){.lab-shell{height:100dvh;min-height:650px}.lab-workspace{min-height:0}.lab-stage{border-radius:6px;min-height:0}.lab-stage:not(.lab-stage-three){padding-bottom:62px}.lab-stage:not(.lab-stage-three) .stage-caption{color:#dce9f0;background:#152832;border-top:1px solid #35505d;min-height:62px;padding:10px 18px;bottom:0;left:0;right:0}.lab-stage:not(.lab-stage-three) .stage-caption strong{font-size:14px}.lab-stage:not(.lab-stage-three) .stage-caption p{margin:2px 0 0;font-size:12px}.stage-canvas{aspect-ratio:auto;flex:1;min-height:0;max-height:100%}.activity-shell .lab-shell{height:max(650px,100dvh - 240px)}}.equipment-panel,.teacher-panel{border-color:#d2dde5;border-radius:6px}.equipment-item{background:#f6f8fa;border-radius:4px}.equipment-item[aria-pressed=true]{color:#075c87}.activity-overview{background:#182730;border-bottom:2px solid #2e8fbc}.activity-station{border-radius:5px}.activity-station.is-active{box-shadow:none;background:#25485e;border-color:#60b7eb}.activity-next{color:#153d58;background:#dceefb;border-color:#75b8e0;border-radius:5px}@media (max-width:1100px){.free-topbar h1{display:none}.free-lab .free-topbar:has(.free-save-controls){flex-wrap:wrap}.free-workspace{grid-template-columns:minmax(0,1fr) 252px}}@media (max-width:767px){.free-lab .site-header .header-inner{padding-inline:16px}.free-lab .free-topbar:has(.free-save-controls){gap:2px;padding-inline:8px}.free-topbar>a{margin-right:2px}.free-workspace{grid-template-columns:minmax(0,1fr) 176px}.free-library nav{padding:0}.free-library nav button{min-width:40px;font-size:11px}.free-library-content{padding:7px}.free-catalog{gap:5px}.free-catalog>button img{height:65px}.free-catalog>button small{display:none}.lab-header{flex-wrap:wrap;padding:8px 12px}.lab-header h1{font-size:16px}}.introduction-page{background:#f3f6f8;min-width:1100px}.introduction-page .page-container{max-width:1400px;padding:20px 40px 44px}.introduction-page .breadcrumb{color:#647b8a;margin-bottom:16px;font-size:13px}.introduction-page .breadcrumb a{color:#346784}.introduction-page .breadcrumb a:hover{color:#0877ad}.introduction-page .intro-grid{background:#fff;border:1px solid #dfe7ed;border-radius:12px;grid-template-columns:.95fr 1.05fr;align-items:stretch;gap:0;margin-bottom:24px;overflow:hidden}.introduction-page .intro-art{background:#172831;border-radius:0;min-width:0;min-height:350px;margin:0;position:relative}.introduction-page .intro-art-heading{z-index:1;color:#b6cad5;letter-spacing:.08em;top:24px;justify-content:space-between;gap:16px;font-size:12px;display:flex;position:absolute;inset-inline:26px}.introduction-page .intro-art-heading>:last-child{font-variant-numeric:tabular-nums;color:#90acbe}.introduction-page .intro-art .apparatus-image{aspect-ratio:auto;height:100%;min-height:350px}.introduction-page .intro-art .apparatus-stage{background:radial-gradient(at 52% 40%,#344d5d,#0000 70%),linear-gradient(#152731,#152731 80%,#425560 81%,#20343f)}.introduction-page .intro-art .apparatus-lineup{gap:18px;padding:54px 30px 68px}.introduction-page .intro-art figcaption{color:#aac0cd;font-size:12px;position:absolute;bottom:22px;left:26px}.introduction-page .intro-copy{flex-direction:column;align-items:flex-start;padding:30px 36px 32px;display:flex}.introduction-page .badge-row{align-items:center;gap:14px}.introduction-page .badge{border-radius:4px;padding:5px 9px;font-size:12px;font-weight:500}.introduction-page .badge-row .badge:last-child{color:#647b89;background:0 0;padding:0}.introduction-page .intro-copy .card-meta{color:#627b8b;margin:18px 0 0;font-size:13px;line-height:1.6}.introduction-page .intro-copy h1{color:#193442;letter-spacing:-.035em;text-wrap:pretty;margin:10px 0 14px;font-size:clamp(28px,2.35vw,36px);font-weight:650;line-height:1.4}.introduction-page .intro-summary{color:#566f80;text-wrap:pretty;margin:0;font-size:15px;line-height:1.85}.introduction-page .experiment-facts{border-top:1px solid #e7edf1;gap:10px;width:100%;margin:22px 0;padding-top:18px;font-size:13px;line-height:1.7}.introduction-page .experiment-facts>div{gap:22px}.introduction-page .experiment-facts dt{color:#788b97;min-width:56px}.introduction-page .experiment-facts dd{color:#365769}.introduction-page .intro-copy .link-button{color:#fff;min-width:184px;min-height:48px;box-shadow:none;background:#173e53;border:1px solid #173e53;border-radius:6px;gap:24px;margin-top:auto;padding:0 23px;font-size:15px}.introduction-page .intro-copy .link-button:hover{background:#0e587d;border-color:#0e587d}.introduction-page .detail-grid{grid-template-columns:.95fr 1.05fr;align-items:start;gap:24px;margin-bottom:0}.introduction-page .detail-panel{box-shadow:none;background:#fff;border:1px solid #dfe7ed;border-radius:10px;padding:26px 28px 28px}.introduction-page .detail-panel h2{color:#24485d;align-items:center;gap:11px;margin:0 0 20px;font-size:19px;font-weight:600;display:flex}.introduction-page .detail-panel h2 svg{color:#4c86a6;width:19px;height:19px}.introduction-page .goal-list{color:#526e80;margin:0;padding-left:22px;font-size:15px;line-height:1.85}.introduction-page .goal-list li{margin:0 0 10px;padding-left:5px}.introduction-page .goal-list li:last-child{margin-bottom:0}.introduction-page .goal-list li::marker{color:#438aad}.introduction-page .intro-apparatus-list{grid-template-columns:repeat(3,minmax(0,1fr));gap:0 18px;margin:-5px 0 0;padding:0;list-style:none;display:grid}.introduction-page .intro-apparatus-list li{color:#536e7f;overflow-wrap:anywhere;border-bottom:1px solid #edf1f4;align-items:center;min-height:38px;padding:7px 0;font-size:14px;line-height:1.6;display:flex}.introduction-page .site-footer{max-width:1320px;padding-block:22px;font-size:13px}@media (prefers-reduced-motion:no-preference){.introduction-page .intro-grid{animation:.4s ease-out both intro-arrive}.introduction-page .intro-copy .link-button svg{transition:transform .2s}.introduction-page .intro-copy .link-button:hover svg{transform:translate(4px)}}@keyframes intro-arrive{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.subscription-page{background:#f6f5f1;min-width:1100px}.subscription-page .page-container{max-width:1264px;padding:28px 40px 48px}.subscription-page-heading{justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:22px;display:flex}.subscription-eyebrow{color:#806230;letter-spacing:.12em;margin:0 0 10px;font-size:12px;font-weight:600}.subscription-page-heading h1{color:#203039;letter-spacing:-.035em;margin:0;font-size:clamp(28px,2.45vw,36px);font-weight:650;line-height:1.3}.subscription-page-heading h1+p{color:#667077;margin:10px 0 0;font-size:14px}.subscription-page-heading>a{color:#57636b;white-space:nowrap;align-items:center;gap:14px;min-height:44px;font-size:13px;display:inline-flex}.subscription-page-heading>a:hover{color:#8b662a}.subscription-page-grid{background:#fff;border:1px solid #e2dfd7;border-radius:12px;grid-template-columns:.8fr 1.5fr;display:grid;overflow:hidden}.subscription-benefits{color:#edf2f3;background:#18272e;flex-direction:column;padding:32px;display:flex}.subscription-benefits-kicker{color:#d5ba83;letter-spacing:.03em;font-size:12px}.subscription-benefits h2{margin:22px 0 12px;font-size:25px;font-weight:600}.subscription-benefits>p{color:#b6c3c8;margin:0;font-size:13px;line-height:1.9}.subscription-benefits ul{margin:24px 0;padding:0;list-style:none}.subscription-benefits li{border-top:1px solid #ffffff1c;gap:16px;padding:18px 0;display:flex}.subscription-benefits li>span{color:#bfa878;font-variant-numeric:tabular-nums;margin-top:2px;font-size:11px}.subscription-benefits h3{margin:0 0 8px;font-size:15px;font-weight:550}.subscription-benefits li p{color:#a6b8c0;margin:0;font-size:12px;line-height:1.85}.subscription-benefits-footer{color:#a6b8c0;border-top:1px solid #ffffff1c;margin-top:auto;padding-top:20px;font-size:12px;line-height:2}.subscription-benefits-footer strong{color:#dfc590;font-weight:500}.subscription-checkout{--brand-600:#84612b;--text-secondary:#667077;padding:24px 34px}.subscription-checkout-heading{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.subscription-checkout-heading h2{margin:0;font-size:23px;font-weight:650}.subscription-checkout-heading>span:not(.account-vip-badge){color:#7a776f;font-size:12px}.subscription-checkout .subscription-intro{margin-bottom:8px}.subscription-checkout .subscription-form>p:not(.subscription-intro):not(.subscription-notice):not(.auth-error){color:#667077;margin:6px 0;font-size:12px}.subscription-checkout .subscription-account{border-bottom:1px solid #ece9e2;margin:8px 0 12px;padding-bottom:8px}.subscription-checkout .subscription-plan-grid{gap:16px}.subscription-checkout .subscription-plan{background:#fdfdfb;border-color:#dedbd4;border-radius:8px;gap:8px;padding:16px 20px;transition:border-color .18s,background-color .18s}.subscription-checkout .subscription-plan:has(input:checked){background:#fcf8ef;border-color:#a98143;box-shadow:inset 0 0 0 1px #a98143}.subscription-checkout .subscription-plan-heading strong{font-size:18px}.subscription-checkout .subscription-price strong,.subscription-guest-price{letter-spacing:-.04em;font-size:36px;font-weight:600;line-height:1.2}.subscription-checkout .subscription-summary{margin:12px 0 8px}.subscription-checkout .subscription-summary>strong{color:#84612b}.subscription-checkout .subscription-payment-button{border-radius:6px;min-height:48px;margin-top:12px;font-size:15px}.subscription-checkout .subscription-payment-button:not(:disabled){background:#20353f;border-color:#20353f}.subscription-checkout .subscription-payment-button:not(:disabled):hover{background:#2e4855}.subscription-checkout .subscription-notice{color:#6f7477;font-size:12px}.subscription-guest .subscription-plan{cursor:default}.subscription-guest-hint{color:#667077;margin:28px 0 0;font-size:13px}.subscription-explanation{grid-template-columns:repeat(3,1fr);gap:40px;padding-top:30px;display:grid}.subscription-explanation h2{color:#3c4b53;margin:0 0 8px;font-size:13px;font-weight:600}.subscription-explanation p{color:#747b80;margin:0;font-size:12px;line-height:1.8}.account-menu-panel .auth-controls a.auth-subscription-button{color:#705121;background:#f6f0e3;border:1px solid #d9e0e5;border-radius:4px;align-items:center;min-height:44px;padding:8px 12px;text-decoration:none;display:flex}.account-menu-panel .auth-controls a.auth-subscription-button:hover{background:#eee3cc;border-color:#c7ab78}@media (prefers-reduced-motion:reduce){.subscription-checkout .subscription-plan{transition:none}}.cooperation-page{color:#f2f4f3;background:#10191f;min-width:1100px;overflow:clip}.cooperation-section-inner{width:min(1240px,100% - 112px);margin-inline:auto}.cooperation-page h1,.cooperation-page h2,.cooperation-page h3,.cooperation-page p,.cooperation-page figure{margin:0}.cooperation-header{z-index:5;border-bottom:1px solid #ffffff15;align-items:center;gap:40px;height:88px;padding-inline:56px;display:flex;position:relative}.cooperation-brand{letter-spacing:-.05em;align-items:baseline;font-size:32px;font-weight:650;display:flex}.cooperation-brand>span{color:#a9d5e8}.cooperation-brand small{letter-spacing:.02em;color:#8b9da7;margin-left:24px;font-size:11px;font-weight:400}.cooperation-header nav{gap:32px;margin-left:auto;display:flex}.cooperation-header a{color:#c0cbd2;align-items:center;min-height:44px;font-size:13px;display:inline-flex}.cooperation-header a:hover{color:#fff}.cooperation-return{border-left:1px solid #ffffff20;gap:16px;padding-left:32px}.cooperation-hero{isolation:isolate;align-items:center;min-height:640px;padding:70px max(56px,50vw - 620px) 110px;display:flex;position:relative}.cooperation-artwork{z-index:-1;width:73%;height:100%;position:absolute;top:0;right:0;overflow:hidden}.cooperation-artwork img{object-fit:contain;width:100%;height:100%;transform:translate(var(--art-x,0px), var(--art-y,0px));transition:transform .65s cubic-bezier(.2,.65,.3,1)}.cooperation-artwork:after{content:"";pointer-events:none;background:linear-gradient(90deg,#10191f 0%,#10191f00 30%),linear-gradient(#10191f 0%,#10191f00 12% 82%,#10191f 100%);position:absolute;inset:0}.cooperation-hero-copy{max-width:560px}.cooperation-eyebrow{letter-spacing:.06em;color:#a5c5d5;font-size:12px;font-weight:500}.cooperation-hero h1{letter-spacing:-.05em;margin-top:25px;font-size:clamp(44px,4vw,58px);font-weight:550;line-height:1.38}.cooperation-hero h1 span{white-space:nowrap;display:block}.cooperation-hero h1 span:last-child{color:#bcd8e5}.cooperation-hero .cooperation-hero-description{color:#aebdc6;max-width:460px;margin-top:26px;font-size:15px;line-height:2}.cooperation-vision{color:#233238;background:#f2f1ec;padding-block:88px 96px}.cooperation-vision .cooperation-eyebrow{color:#617983}.cooperation-page h2{letter-spacing:-.035em;font-size:38px;font-weight:550;line-height:1.5}.cooperation-vision-heading h2{margin-top:18px}.cooperation-vision-heading h2 span{color:#637e8a}.cooperation-vision-grid{grid-template-columns:1fr 1fr;align-items:center;gap:72px;margin-top:42px;display:grid}.cooperation-vision-grid figure img{object-fit:cover;border-radius:3px;width:100%;height:320px;display:block}.cooperation-vision-grid figcaption{color:#76838a;margin-top:14px;font-size:12px}.cooperation-vision-copy .cooperation-statement{color:#293f49;margin-bottom:26px;font-size:27px;line-height:1.6}.cooperation-vision-copy p:not(.cooperation-statement){color:#63727a;max-width:460px;margin-top:18px;font-size:14px;line-height:2.05}.cooperation-services{grid-template-columns:.9fr 1.15fr;gap:110px;padding-block:100px;display:grid}.cooperation-services-intro{align-self:start;position:sticky;top:65px}.cooperation-services-intro h2{margin:22px 0}.cooperation-services-intro>p:last-child{color:#a1b3be;font-size:14px;line-height:2}.cooperation-service-list{gap:46px;display:grid}.cooperation-service-list article{border-left:2px solid #355363;padding:0 0 0 28px;transition:border-color .3s,transform .3s}.cooperation-service-list article:hover{border-color:#a5d4e8;transform:translate(4px)}.cooperation-service-list .cooperation-service-scope{color:#91afbe;letter-spacing:.04em;margin-bottom:10px;font-size:11px}.cooperation-service-list h3{margin-bottom:10px;font-size:27px;font-weight:550}.cooperation-service-list strong{color:#d3dfe5;font-size:14px;font-weight:500}.cooperation-service-list article>p:last-child{color:#9fafbb;margin-top:12px;font-size:13px;line-height:2}.cooperation-practice{background:#1b2a32;padding-block:80px}.cooperation-practice-heading{grid-template-columns:1fr 1fr;align-items:end;gap:80px;margin-bottom:38px;display:grid}.cooperation-practice-heading h2{margin-top:18px;font-size:42px}.cooperation-practice-heading .cooperation-practice-tagline{color:#c5d9e4;margin-top:10px;font-size:19px}.cooperation-practice-heading>p{color:#a9beca;font-size:14px;line-height:2}.cooperation-product-image{background:#0d181e;border:1px solid #41545f;border-radius:8px;padding:12px 12px 0}.cooperation-product-image img{border-radius:3px;width:100%;height:auto;display:block}.cooperation-product-image figcaption{color:#96afbf;justify-content:space-between;padding:18px 8px;font-size:12px;display:flex}.cooperation-contact{grid-template-columns:1.25fr 1fr;align-items:center;gap:80px;padding-block:104px;display:grid}.cooperation-contact h2{margin:20px 0 26px;font-size:42px}.cooperation-contact-copy>p:not(.cooperation-eyebrow){color:#a9bbc6;max-width:520px;margin-top:16px;font-size:14px;line-height:2}.cooperation-qr{text-align:center;justify-self:center}.cooperation-qr img{background:#fff;border-radius:3px;width:320px;height:320px;display:block}.cooperation-qr figcaption{gap:9px;margin-top:20px;display:grid}.cooperation-qr strong{color:#e3edf3;font-size:16px;font-weight:500}.cooperation-qr figcaption>span{color:#8ea7b7;font-size:12px}.cooperation-footer{color:#7c96a6;border-top:1px solid #ffffff1a;align-items:center;gap:28px;padding-block:30px;font-size:12px;display:flex}.cooperation-footer-brand{color:#d3e6ef;letter-spacing:-.06em;font-size:26px;font-weight:600}.cooperation-footer>span:last-child{margin-left:auto}@media (prefers-reduced-motion:no-preference){.cooperation-hero-copy{animation:.9s ease-out both home-enter}.cooperation-artwork{animation:1.2s ease-out both cooperation-art-enter}html:has(.cooperation-page){scroll-behavior:smooth}}@keyframes cooperation-art-enter{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}@media (prefers-reduced-motion:reduce){.cooperation-artwork img,.cooperation-service-list article{transition:none;transform:none}}@media (min-width:1600px){.cooperation-hero{min-height:720px}.cooperation-artwork{width:66%;right:0}}.site-header nav .header-coming-soon{color:#9daeb9;cursor:not-allowed;opacity:1;min-height:48px;font:inherit;white-space:nowrap;background:0 0;border:0;border-radius:0;flex-direction:column;justify-content:center;align-items:flex-start;gap:1px;padding:0 8px;font-size:14px;display:flex}.header-coming-soon small{letter-spacing:.08em;color:#94a7b4;font-size:10px}.feedback-scope .dialog{color:#203440;background:#fff;width:min(580px,100vw - 48px);max-height:calc(100dvh - 48px);margin:auto}.feedback-scope .dialog-body{padding-top:4px}.feedback-intro{color:#566b79;margin:0 0 16px;font-size:14px}.feedback-account{color:#60717c;border-bottom:1px solid #e0e7eb;gap:16px;margin:0 0 20px;padding-bottom:16px;font-size:13px;display:flex}.feedback-account span{overflow-wrap:anywhere;color:#233f50}.feedback-form fieldset{border:0;min-width:0;margin:0;padding:0}.feedback-form label{flex-direction:column;gap:8px;font-size:14px;font-weight:500;display:flex}.feedback-fields{grid-template-columns:150px 1fr;gap:16px;margin-bottom:18px;display:grid}.feedback-form input,.feedback-form select,.feedback-form textarea{color:#203440;width:100%;min-height:44px;font:inherit;background:#fcfdfd;border:1px solid #cdd9e1;border-radius:5px;padding:10px 12px}.feedback-form textarea{resize:vertical;min-height:120px;max-height:240px}.feedback-meta{color:#637581;justify-content:space-between;margin:8px 0 22px;font-size:12px;display:flex}.feedback-submit{color:#fff;width:100%;min-height:48px;font:inherit;cursor:pointer;background:#213b48;border:0;border-radius:5px;font-weight:600}.feedback-submit:hover:not(:disabled){background:#315666}.feedback-submit:disabled{opacity:.55;cursor:not-allowed}.feedback-success{padding-block:20px 4px}.feedback-kicker{color:#617983;font-size:12px}.feedback-success h3{margin:12px 0;font-size:28px}.feedback-success p{color:#536a76}.feedback-success small{overflow-wrap:anywhere;color:#617983;margin:24px 0;display:block}.omni-feedback-record{background:#fff;border:1px solid #dce5df;border-radius:10px;margin:14px 0;padding:24px}.omni-feedback-row{align-items:center;gap:24px;display:flex}.omni-feedback-row>div{flex:1;min-width:0}.omni-feedback-row h2{overflow-wrap:anywhere;margin:5px 0;font-size:18px}.omni-feedback-row p,.omni-feedback-category{color:#607a6c;overflow-wrap:anywhere;margin:0;font-size:13px}.omni-feedback-status{color:#886628;white-space:nowrap;background:#fbf4e6;border-radius:4px;padding:5px 10px;font-size:13px}.omni-feedback-status[data-status=in_progress]{color:#266080;background:#eaf4fa}.omni-feedback-status[data-status=resolved]{color:#276548;background:#eaf4ec}.omni-feedback-detail{border-top:1px solid #e0e8e2;margin-top:22px;padding-top:18px}.omni-feedback-content{white-space:pre-wrap;overflow-wrap:anywhere;background:#f7f9f7;padding:18px;line-height:1.85}.omni-feedback-detail dl{color:#63796c;grid-template-columns:80px 1fr;gap:8px;font-size:13px;display:grid}.omni-feedback-detail dd{overflow-wrap:anywhere;margin:0}.omni-feedback-detail form{grid-template-columns:180px 1fr;gap:18px;margin-top:24px;display:grid}.omni-feedback-detail textarea{width:100%;font:inherit;resize:vertical;border:1px solid #cfddd3;border-radius:8px;min-height:90px;padding:12px}.omni-feedback-actions{grid-column:1/-1;justify-content:space-between;align-items:center;gap:16px;display:flex}.omni-feedback-actions small{color:#63796c}.omni-feedback-pagination{justify-content:flex-end;align-items:center;gap:20px;margin-block:24px;display:flex}.omni-feedback-saved{color:#276548;background:#e5f2e9;padding:12px 16px}*{box-sizing:border-box}html{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light only;background:var(--bg-page)}body{color:var(--text-primary);background:var(--bg-page);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;font-size:16px;line-height:1.5}h2,h3{font-weight:650}.goal-list{list-style:outside}.teacher-goals,.dialog-body ol{list-style:decimal}.dialog-body ol{padding-left:24px}a{color:inherit;text-decoration:none}svg{flex-shrink:0;width:20px;height:20px}button,input,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent;touch-action:manipulation}:focus-visible{outline:3px solid var(--brand-600);outline-offset:4px}.muted{color:var(--text-muted);font-size:14px;line-height:1.8}.skip-link{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.skip-link:focus{z-index:100;clip-path:none;width:auto;height:auto;color:var(--brand-600);background:#fff;padding:12px 20px;position:fixed;top:12px;left:16px}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}
