@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;--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;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}.fixed{position:fixed}.ml-auto{margin-left:auto}.flex{display:flex}.grid{display:grid}.hidden{display:none}.w-6{width:calc(var(--spacing) * 6)}.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}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-2{gap:calc(var(--spacing) * 2)}.shadow{--tw-shadow:0 1px 3px 0 var(--tw-shadow-color,#0000001a), 0 1px 2px -1px var(--tw-shadow-color,#0000001a);box-shadow:var(--tw-inset-shadow),var(--tw-inset-ring-shadow),var(--tw-ring-offset-shadow),var(--tw-ring-shadow),var(--tw-shadow)}.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)}.filter{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{color:#273249;font-synthesis:none;background:#f5f6fa;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;font-size:14px;font-weight:400;line-height:1.6}*{box-sizing:border-box}body{margin:0}button,a,input{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;transition:background .18s,color .18s,border-color .18s}button:disabled{cursor:default;opacity:.5}button:focus-visible,a:focus-visible,summary:focus-visible,svg:focus-visible{outline-offset:4px;outline:3px solid #b5a6ff}a{color:inherit;text-decoration:none}h1,h2,h3,p{margin:0}h2{font-size:16px;font-weight:650}h3{font-size:14px;font-weight:650}.app{min-height:100vh;display:flex}.sidebar{color:#d0d7e7;z-index:20;background:#111c30;flex-direction:column;flex-shrink:0;width:222px;padding:31px 19px 24px;display:flex;position:fixed;inset:0 auto 0 0}.brand{color:#fff;letter-spacing:3px;align-items:center;gap:12px;padding-left:8px;font-size:25px;font-weight:600;line-height:1.1;display:flex}.brand-icon{color:#fff;background:#7663ee;border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;width:41px;height:41px;display:inline-flex}.brand-en{letter-spacing:2px;color:#a7aec4;margin-top:8px;font-size:9px;display:block}.sidebar-caption{color:#73809a;letter-spacing:2px;margin:23px 0 43px 10px;font-size:12px}.nav-heading{color:#68758f;letter-spacing:2px;margin-bottom:14px;padding-left:15px;font-size:11px}.subject{color:#9daac1;text-align:left;background:0 0;border:0;border-radius:8px;align-items:center;gap:13px;width:100%;margin:5px 0;padding:13px 15px;display:flex}.subject svg:last-child{margin-left:auto}.subject:hover{background:#1c2940}.subject.active{color:#c5bbff;background:#2b2a50}.lesson-link{color:#c1c9d9;background:0 0;border:0;align-items:center;gap:10px;width:100%;padding:19px 4px 21px 25px;font-size:12px;display:flex}.lesson-link>span:first-child{background:#a894ff;border-radius:50%;width:5px;height:5px}.nav-badge{color:#78859f;margin-left:auto;font-size:10px}.sidebar-bottom{margin-top:auto;padding-top:100px}.lab-note{color:#9aa8c1;border-top:1px solid #273148;padding:23px 10px 30px}.lab-note svg{color:#7b6ed0;margin-bottom:11px}.lab-note h3{color:#bcc6d9;font-size:13px;font-weight:500}.lab-note p{color:#73809a;margin-top:9px;font-size:12px;line-height:1.9}.sidebar-bottom>.tiny{color:#71809a;justify-content:space-between;font-size:10px;display:flex}.version{letter-spacing:1px;font-size:9px}.main-shell{width:calc(100% - 222px);margin-left:222px}.collapsed .sidebar{display:none}.collapsed .main-shell{width:100%;margin-left:0}.topbar{background:#fff;border-bottom:1px solid #e7eaf0;justify-content:space-between;align-items:center;height:69px;padding:0 35px;display:flex}.breadcrumbs{color:#9099aa;align-items:center;gap:14px;font-size:12px;display:flex}.breadcrumbs b{color:#4c5870;font-weight:500}.icon-button{color:#8c96a8;background:0 0;border:0;padding:5px;display:flex}.top-label{color:#84908e;align-items:center;gap:7px;font-size:11px;display:flex}.top-label>span{background:#6eae9f;border-radius:50%;width:5px;height:5px}main{max-width:1390px;margin:0 auto;padding:34px 38px 20px}.lesson-heading{justify-content:space-between;align-items:center;gap:20px;margin-bottom:28px;display:flex}.eyebrow{letter-spacing:1.5px;color:#8b88a5;align-items:center;gap:12px;font-size:10px;font-weight:600;display:flex}.eyebrow>span:not(.dot){color:#c9cbd5}h1{letter-spacing:-.6px;margin:8px 0;font-size:28px;font-weight:650}.lesson-heading p{color:#8a92a3;font-size:13px}.progress-box{flex-shrink:0;width:132px}.progress-box>span{color:#9298a7;justify-content:space-between;font-size:11px;display:flex}.progress-box b{color:#7463dc;font-size:17px;line-height:1}.progress-box small{color:#aaaebe;font-size:11px;font-weight:400}.progress-track{background:#e5e5f0;border-radius:4px;height:4px;margin-top:12px;overflow:hidden}.progress-track>div{background:#8b7aee;height:100%;transition:width .3s}.stages{background:#fff;border:1px solid #e6e8ef;border-radius:9px;margin-bottom:21px;padding:7px;display:flex;overflow:hidden}.stages button{color:#8b92a0;background:0 0;border:0;border-radius:5px;flex:1;justify-content:center;align-items:center;gap:12px;padding:10px 4px;font-size:12px;display:flex;position:relative}.stages button>span{color:#b6bac5;font-size:10px}.stages button>svg{color:#d5d9e1;position:absolute;right:-7px}.stages .current{color:#7660d7;background:#f0edff;font-weight:600}.stages .current>span{color:#8b75de}.concept-card{background:#eeedf9;border:1px solid #e5e2f4;border-radius:8px;align-items:center;gap:14px;margin-bottom:23px;padding:16px 19px;display:flex}.concept-icon{color:#8d79d7;background:#e5e0f8;border-radius:9px;flex-shrink:0;justify-content:center;align-items:center;width:35px;height:35px;display:flex}.concept-card h3{color:#63558e;margin-bottom:3px;font-size:13px}.concept-card p{color:#8a819f;font-size:12px;line-height:1.8}.workspace{grid-template-columns:minmax(0,1fr) 298px;align-items:start;gap:22px;display:grid}.panel{background:#fff;border:1px solid #e5e8f0;border-radius:11px;overflow:hidden}.panel-heading{justify-content:space-between;align-items:center;padding:19px 22px 16px;display:flex}.panel-heading h2{font-size:14px}.muted{color:#959cab}.molecule-tabs{border-top:1px solid #f1f2f6;border-bottom:1px solid #eceef5;gap:5px;padding:11px 19px;display:flex}.molecule-tabs button{color:#9299a7;background:0 0;border:1px solid #0000;border-radius:6px;flex:1;min-width:0;padding:7px 1px;font-size:13px;position:relative}.molecule-tabs button:hover{background:#f6f4ff}.molecule-tabs .active{color:#715cce;background:#f1edff;border-color:#ded7fa}.solved-check{color:#599f88;position:absolute;top:1px;right:1px}.model-title{z-index:2;pointer-events:none;align-items:center;gap:12px;padding:22px 24px;display:flex;position:absolute}.model-title>span:nth-child(2){color:#a0a5b1;font-size:12px}.geometry-tag{color:#816cba;background:#f2eefb;border-radius:4px;padding:2px 7px;font-size:11px}.viewer{background:radial-gradient(#f8f9ff,#fcfcfe 70%,#fff);position:relative}.viewer-meta{pointer-events:none;color:#b1b6c3;flex-direction:column;gap:6px;font-size:10px;display:flex;position:absolute;top:75px;left:25px}.model-tag{letter-spacing:1px;color:#a0a8ba;font-size:9px}:is(.molecule-svg,.molecule-canvas){cursor:grab;touch-action:none;width:100%;height:370px;display:block}:is(.molecule-svg,.molecule-canvas):active{cursor:grabbing}.viewer-bottom{justify-content:space-between;align-items:center;padding:0 23px 13px;display:flex}.view-tools{background:#fff;border:1px solid #e5e7f0;border-radius:6px;padding:3px;display:flex}.view-tools button{color:#8993a8;background:0 0;border:0;justify-content:center;align-items:center;width:28px;height:27px;display:flex}.view-tools button:hover{background:#f1effb}.model-disclaimer{text-align:center;color:#a6aeba;padding:0 12px 12px;font-size:9px}.angle-note{color:#76639f;background:#f0edf9;border-radius:6px;flex-direction:column;margin:0 23px 15px;padding:10px 12px;font-size:11px;display:flex}.angle-note span{margin-top:2px;font-size:10px}.display-options{background:#fff;border-top:1px solid #eef0f5;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:16px 22px;display:flex}.toggle-label{color:#7e8798;cursor:pointer;align-items:center;gap:7px;font-size:11px;display:flex;position:relative}.toggle-label input{opacity:0;width:30px;height:20px;position:absolute}.switch{background:#dfe3ec;border-radius:15px;width:26px;height:15px;transition:background .2s;display:block;position:relative}.switch:after{content:"";background:#fff;border-radius:50%;width:11px;height:11px;transition:transform .2s;position:absolute;top:2px;left:2px;box-shadow:0 1px 2px #0001}.toggle-label input:checked+.switch{background:#8f7ddd}.toggle-label input:checked+.switch:after{transform:translate(11px)}.toggle-label input:focus-visible+.switch{outline-offset:3px;outline:3px solid #b9aaff}.demo-footer{color:#9ba1af;border-top:1px solid #f1f2f5;justify-content:center;gap:23px;padding:12px;font-size:10px;display:flex}.demo-footer>span{align-items:center;gap:6px;display:flex}.legend-dot{border-radius:50%;width:7px;height:7px;display:inline-block}.central{background:#917fe0}.outer{background:#c3cada}.lone{background:#e9dffc;border:1px solid #bd9ddd}.question{padding:22px 20px}.question .eyebrow{letter-spacing:1px;color:#9b93b4;font-size:10px}.dot{background:#9c86d8;border-radius:50%;width:5px;height:5px}.question h2{margin:15px 0 7px;font-size:16px}.question>.muted{font-size:11px}.answers{grid-template-columns:1fr;gap:7px;margin:19px 0 15px;display:grid}.answer{text-align:left;color:#7c8598;background:#fff;border:1px solid #e9eaf1;border-radius:6px;align-items:center;gap:11px;min-height:37px;padding:8px 11px;font-size:12px;display:flex}.answer>span{color:#a8aebd;background:#f6f7fa;border-radius:3px;justify-content:center;align-items:center;width:20px;height:20px;font-size:10px;display:flex}.answer svg{margin-left:auto}.answer:hover{background:#faf9ff;border-color:#c9bcef}.answer.selected{color:#7c60c8;background:#f5f1ff;border-color:#b8a4ec}.answer.selected>span{color:#8c70c6;background:#e7defa}.primary{color:#fff;background:#8270d8;border:0;border-radius:6px;justify-content:center;align-items:center;gap:14px;padding:11px 18px;font-size:12px;display:flex}.primary:hover{background:#705aca}.submit{justify-content:space-between;width:100%}.submit:disabled{opacity:.65;background:#b6accf}.hint-panel{border-top:1px solid #eeedf3;margin-top:17px;padding-top:13px}.hint-button{color:#a29375;text-align:left;background:0 0;border:0;align-items:center;gap:7px;width:100%;padding:0;font-size:11px;display:flex}.hint-button small{color:#a8a1b1;margin-left:auto;font-size:10px}.hint-panel p{color:#8b819d;gap:8px;margin:12px 0 0;font-size:11px;line-height:1.8;display:flex}.hint-panel p b{color:#a996cb}.feedback{color:#a78252;margin-top:12px;font-size:12px;line-height:1.8}.feedback.success{color:#5e957e}.graph-panel{background:#fff;border:1px solid #e7e9f0;border-radius:10px;margin-top:17px;padding:22px 20px 13px}.graph-panel h3{font-size:12px}.graph-panel .muted{font-size:10px}.chart{width:100%;height:106px;margin-top:16px}.summary{background:#f9fafc;align-items:flex-start;gap:14px;min-height:86px;margin-top:17px;padding:20px;display:flex}.summary-icon{color:#aab1c2;padding-top:3px}.summary h3{color:#838ca0;margin-bottom:5px;font-size:12px}.summary p{color:#a0a7b7;font-size:11px;line-height:1.9}.summary.unlocked{background:#f5f2ff;border-color:#dfd7f7}.summary.unlocked h3,.summary.unlocked strong{color:#7961ad}.summary.unlocked p{color:#8a7da3}.summary-formula{color:#8a7da3;align-items:center;gap:13px;margin-top:10px;font-size:10px;display:flex}.summary-formula .katex{font-size:16px}.lesson-footer{color:#a5abb7;justify-content:space-between;align-items:center;padding:23px 0 17px;font-size:10px;display:flex}.lesson-footer>span,.lesson-footer>button{align-items:center;gap:8px;display:flex}.lesson-footer button{color:#8c7abc;background:0 0;border:0;font-size:12px}.sources{color:#a0a7b6;border-top:1px solid #e7e8ef;padding-top:13px;font-size:10px}.sources summary{cursor:pointer}.sources p{max-width:800px;margin:12px 0;line-height:1.8}.sources a{color:#8d7db5;align-items:center;gap:5px;margin-right:20px;display:inline-flex}.empty-course{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:20px;min-height:70vh;display:flex}.empty-course p{color:#929aaa}.empty-course h1{font-size:25px}@media(min-width:1550px){main{padding-top:45px}:is(.molecule-svg,.molecule-canvas){height:425px}.workspace{grid-template-columns:minmax(0,1fr) 325px}.question{padding:25px}.answer{padding:11px}.viewer-meta{top:80px}}@media(max-width:1150px){.sidebar{width:185px;padding-inline:13px}.main-shell{width:calc(100% - 185px);margin-left:185px}main{padding:28px 24px 18px}.workspace{grid-template-columns:minmax(0,1fr) 265px;gap:16px}h1{font-size:24px}.display-options{justify-content:flex-start;gap:14px}:is(.molecule-svg,.molecule-canvas){height:345px}.topbar{padding:0 23px}.progress-box{width:100px}.question{padding:20px 16px}.lesson-link{padding-left:15px;font-size:11px}}@media(max-width:950px){.sidebar{width:165px}.main-shell{width:calc(100% - 165px);margin-left:165px}.workspace{grid-template-columns:1fr}.workspace-side{grid-template-columns:1fr 1fr;align-items:start;gap:16px;display:grid}.graph-panel{margin:0}:is(.molecule-svg,.molecule-canvas){height:380px}.lesson-heading{align-items:flex-start}.progress-box{width:85px;padding-top:20px}.top-label{display:none}.brand{gap:8px;padding-left:0;font-size:21px}.brand-en{font-size:8px}.sidebar-caption{letter-spacing:1px;margin-left:2px;font-size:10px}.subject{padding:13px 9px}.lesson-link{padding-left:8px}.nav-badge{display:none}.stages button{gap:6px}.question .answers{grid-template-columns:1fr}.concept-card p{font-size:12px}.concept-card{align-items:flex-start}}@media(max-width:650px){.sidebar{width:100%;padding:16px 19px;position:relative}.app{display:block}.main-shell{width:100%;margin:0}.brand{font-size:23px}.brand-en{margin-left:12px;font-size:8px;display:inline}.sidebar-caption,.nav-heading,.sidebar-bottom,.lesson-link{display:none}.sidebar nav{gap:8px;margin-top:14px;display:flex}.sidebar nav>div{flex:1}.subject{margin:0;padding:9px 12px;font-size:12px}.subject svg:last-child{display:none}.topbar{height:52px;padding:0 16px}.breadcrumbs{gap:8px;font-size:10px}main{padding:23px 15px 16px}.lesson-heading{gap:10px;margin-bottom:21px}h1{font-size:21px;line-height:1.5}.lesson-heading p{font-size:12px}.progress-box{width:60px;padding-top:8px}.progress-box>span{font-size:9px;display:block}.progress-box b{margin-top:10px;font-size:14px;display:block}.stages{margin-bottom:16px;padding:4px}.stages button{gap:4px;padding:10px 0;font-size:11px}.stages button>span{display:none}.stages button>svg{width:10px;right:-5px}.concept-card{gap:10px;margin-bottom:16px;padding:13px}.concept-card h3{font-size:12px}.concept-card p{font-size:11px}.concept-icon{width:29px;height:29px}.workspace-side{grid-template-columns:1fr}.answers{grid-template-columns:1fr 1fr!important}.question h2{font-size:17px}.question>.muted,.answer{font-size:12px}.molecule-tabs{gap:0;padding:10px 8px}.molecule-tabs button{font-size:11px}.panel-heading{padding:17px}.model-title{padding:19px}.viewer-meta{top:65px;left:19px}.viewer-meta>span:last-child{display:none}:is(.molecule-svg,.molecule-canvas){height:320px}.display-options{justify-content:space-between;gap:10px;padding:14px 16px}.toggle-label{gap:5px;font-size:10px}.switch{width:24px}.toggle-label input:checked+.switch:after{transform:translate(9px)}.viewer-bottom{padding:0 16px 13px}.viewer-bottom>.tiny{font-size:9px}.model-disclaimer{font-size:8px}.graph-panel{padding:18px}.lesson-footer{gap:12px;font-size:9px}.summary-formula{flex-wrap:wrap}.summary{padding:18px}.topbar .icon-button{padding:0}.sources,.geometry-tag{font-size:10px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}.concept-card p,.question>.muted,.answer,.toggle-label,.summary p,.hint-panel p,.feedback,.lesson-heading p{font-size:14px}.concept-card p{color:#716785}.muted,.question>.muted{color:#7c8598}.answer{color:#626d83}.summary p{color:#7f899c}.hint-panel p{color:#7b6b93}.concept-card h3,.summary h3,.graph-panel h3,.primary,.hint-button,.stages button{font-size:14px}.display-options{row-gap:14px}.model-disclaimer{font-size:11px}.graph-panel .muted,.demo-footer,.sources,.lesson-footer,.viewer-meta,.model-title>span:nth-child(2){font-size:12px}.viewer-meta{max-width:140px}.model-title>.katex{font-size:24px}.summary h3{color:#66738b}.tiny{font-size:12px}.question .eyebrow{font-size:11px}.answer:disabled{opacity:1}.answer:disabled:not(.selected){color:#a1a7b5}.toggle-label{gap:6px}.molecule-tabs button{font-size:14px}@media(max-width:1150px){.display-options{justify-content:flex-start;gap:16px}.toggle-label{font-size:13px}}@media(max-width:650px){.display-options{grid-template-columns:1fr 1fr;display:grid}.concept-card p,.question>.muted,.summary p,.hint-panel p{font-size:13px}.concept-card h3{font-size:14px}.viewer-meta,.viewer-bottom>.tiny,.model-disclaimer{font-size:10px}.molecule-tabs button{font-size:12px}.lesson-footer{font-size:11px}.lesson-footer>span{max-width:48%}.concept-icon{display:none}}.toggle-label input{z-index:1;cursor:pointer}.switch{pointer-events:none}.molecule-canvas{position:relative}.molecule-canvas canvas{width:100%;height:100%;display:block}.viewer-meta{z-index:1}.renderer-notice{color:#79678e;background:#f3eefc;padding:8px 16px;font-size:12px}.organ-title{letter-spacing:-.4px;color:#3c4763;font-size:22px;font-weight:650}.part-chips{background:#fff;border-top:1px solid #eef0f5;flex-wrap:wrap;gap:7px;padding:15px 22px 17px;display:flex}.part-chip{color:#7c6f9e;background:#faf9ff;border:1px solid #e6e4f2;border-radius:20px;padding:5px 13px;font-size:12px}.part-chip:hover{background:#f4f0ff;border-color:#c4b4ec}.part-chip.active{color:#fff;background:#8270d8;border-color:#8270d8}.part-card{padding:18px 20px 20px}.part-card-heading .eyebrow{gap:8px}.part-detail{margin-top:13px}.part-detail h2{color:#3c4763;font-size:19px}.part-latin{color:#a294c4;margin:4px 0 11px;font-size:11px;font-style:italic}.part-function{color:#716d85;background:#f7f5fc;border:1px solid #edeaf7;border-radius:8px;padding:11px 13px;font-size:13px;line-height:1.9}.part-detail.empty{text-align:center;color:#b3aec6;flex-direction:column;align-items:center;gap:11px;padding:22px 6px;display:flex}.part-detail.empty p{color:#9792ad;font-size:12px;line-height:1.9}.facts-card .panel-heading{padding:17px 20px 13px}.fact-list{margin:0;padding:0 20px 17px}.fact-row{border-top:1px solid #f0f1f6;align-items:baseline;gap:14px;padding:8px 0;display:flex}.fact-row dt{color:#9a94b5;flex-shrink:0;width:42px;font-size:11px}.fact-row dd{color:#5d6880;margin:0;font-size:12px}.trivia-card{background:linear-gradient(135deg,#f3efff,#faf4f0);border:1px solid #e7e0f6;border-radius:10px;margin-top:17px;padding:18px 20px}.trivia-card h3{color:#7a68b0;align-items:center;gap:7px;font-size:12px;display:flex}.trivia-card p{color:#8a7fa8;margin-top:9px;font-size:12px;line-height:1.9}@media(max-width:650px){.organ-title{font-size:17px}.part-function,.fact-row dd,.trivia-card p{font-size:13px}.part-chips{padding:12px 14px 14px}}.anatomy-workspace{grid-template-columns:208px minmax(0,1fr) 296px;align-items:start;gap:20px;display:grid}.organ-library{padding:16px 13px 13px}.organ-library h2{letter-spacing:1.5px;color:#8b88a5;justify-content:space-between;align-items:baseline;padding:0 7px 12px;font-size:11px;display:flex}.organ-library h2 span{letter-spacing:.5px;color:#b9bcc9;font-size:10px;font-weight:500}.organ-library ul{flex-direction:column;gap:4px;max-height:560px;margin:0;padding:0;list-style:none;display:flex;overflow-y:auto}.organ-item{text-align:left;background:0 0;border:1px solid #0000;border-radius:9px;align-items:center;gap:10px;width:100%;padding:7px 8px;display:flex}.organ-item:hover{background:#f6f4ff}.organ-item.active{background:#f1edff;border-color:#ded7fa}.organ-item img{object-fit:cover;background:#f3f1fa;border-radius:8px;flex-shrink:0;width:40px;height:40px}.organ-item-text{flex-direction:column;min-width:0;display:flex}.organ-item-text b{color:#4c5870;white-space:nowrap;text-overflow:ellipsis;font-size:12px;font-weight:600;overflow:hidden}.organ-item.active .organ-item-text b{color:#715cce}.organ-item-text small{color:#9aa2b5;font-size:10px}.organ-item-check{color:#599f88;flex-shrink:0;margin-left:auto}.organ-library-hint{color:#aab0bf;border-top:1px solid #f0f1f6;margin:12px 7px 0;padding-top:10px;font-size:10px}.concept-system{color:#8d79d7;vertical-align:2px;background:#e9e3fa;border-radius:4px;margin-left:10px;padding:2px 8px;font-size:10px;font-weight:500;display:inline-block}.organ-loading{z-index:3;color:#8b84a8;background:#fcfcfed1;flex-direction:column;justify-content:center;align-items:center;gap:12px;font-size:12px;display:flex;position:absolute;inset:0}.organ-loading .progress-track{width:180px;margin-top:0}.organ-loading .spin{color:#8b7aee;animation:1s linear infinite organ-spin}@keyframes organ-spin{to{transform:rotate(360deg)}}.organ-tooltip{z-index:4;pointer-events:none;color:#fff;white-space:nowrap;background:#2b2a50;border-radius:7px;flex-direction:column;align-items:center;padding:6px 11px;display:flex;position:absolute;transform:translate(-50%,calc(-100% - 14px));box-shadow:0 4px 14px #2b2a5047}.organ-tooltip b{font-size:12px;font-weight:600}.organ-tooltip span{color:#b9b3dd;font-size:9px;font-style:italic}.organ-tooltip:after{content:"";border:5px solid #0000;border-top-color:#2b2a50;position:absolute;top:100%;left:50%;transform:translate(-50%)}.part-chip{align-items:center;gap:6px;display:inline-flex}.part-chip .legend-dot{border:1px solid #00000014}@media(max-width:1250px){.anatomy-workspace{grid-template-columns:178px minmax(0,1fr) 265px;gap:16px}}@media(max-width:1080px){.anatomy-workspace{grid-template-columns:minmax(0,1fr) 265px}.organ-library{grid-column:1/-1}.organ-library ul{flex-direction:row;max-height:none;padding-bottom:4px;overflow:auto hidden}.organ-library li{flex-shrink:0}.organ-item-text small,.organ-library-hint{display:none}}@media(max-width:880px){.anatomy-workspace{grid-template-columns:1fr}}.lesson-skeleton{color:#8b84a8;letter-spacing:1px;justify-content:center;align-items:center;gap:10px;min-height:320px;font-size:13px;display:flex}.skeleton-dot{background:#8b7aee;border-radius:50%;width:10px;height:10px;animation:.9s ease-in-out infinite alternate skeleton-pulse}@keyframes skeleton-pulse{0%{opacity:.25;transform:scale(.8)}to{opacity:1;transform:scale(1.15)}}@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}
