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| *{margin:0;padding:0;box-sizing:border-box} | |
| :root{ | |
| --bg1:#1a1a2e;--bg2:#16213e;--bg3:#0f0f23; | |
| --accent:#e94560;--accent2:#ff6b6b; | |
| --text1:#eef0f2;--text2:#9ca3af; | |
| --border:#2d3a59;--success:#4ade80;--warn:#fbbf24; | |
| } | |
| body{font-family:'Segoe UI',system-ui,sans-serif;background:var(--bg1);color:var(--text1);height:100vh;overflow:hidden} | |
| /* layout */ | |
| .screen-switcher{height:56px;display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--border);background:linear-gradient(180deg,#18233f,#131c33);position:sticky;top:0;z-index:30} | |
| .screen-btn{padding:8px 14px;border-radius:999px;border:1px solid var(--border);background:var(--bg3);color:var(--text2);cursor:pointer;font-size:13px;font-weight:600} | |
| .screen-btn.active{border-color:var(--accent);color:#fff;background:rgba(233,69,96,.2)} | |
| .app-screen{display:none;height:calc(100vh - 56px)} | |
| .app-screen.active{display:block} | |
| .app-container{display:flex;height:100%} | |
| .sidebar{width:290px;background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden;position:sticky;top:0;height:100%;flex-shrink:0} | |
| .logo{padding:18px 20px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--border)} | |
| .logo-icon{font-size:30px;color:var(--accent)} | |
| .logo-text{font-size:17px;font-weight:600} | |
| .sidebar-toggle-btn{margin-left:auto} | |
| .formula-library{flex:1;overflow-y:auto;padding:14px} | |
| .formula-library h3,.symbol-palette h3{font-size:11px;text-transform:uppercase;color:var(--text2);margin-bottom:10px;letter-spacing:1px} | |
| .symbol-palette{padding:14px;border-top:1px solid var(--border);max-height:240px;overflow-y:auto} | |
| /* categories */ | |
| .category-list{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px} | |
| .category-btn{padding:5px 11px;background:var(--bg3);border:1px solid var(--border);border-radius:18px;color:var(--text2);font-size:12px;cursor:pointer;transition:.2s} | |
| .category-btn:hover,.category-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)} | |
| /* formula list */ | |
| .formula-list{display:flex;flex-direction:column;gap:6px} | |
| .formula-item{padding:10px 12px;background:var(--bg3);border:1px solid var(--border);border-radius:7px;cursor:pointer;transition:.2s} | |
| .formula-item:hover{border-color:var(--accent);transform:translateX(3px)} | |
| .formula-item .name{font-weight:500;font-size:13px;margin-bottom:3px} | |
| .formula-item .preview{font-size:13px;color:var(--text2);overflow:hidden} | |
| /* symbols */ | |
| .sym-group{margin-bottom:10px} | |
| .sym-group-title{font-size:11px;color:var(--text2);margin-bottom:5px} | |
| .sym-btns{display:flex;flex-wrap:wrap;gap:4px} | |
| .sym-btn{padding:5px 9px;background:var(--bg3);border:1px solid var(--border);border-radius:5px;color:var(--text1);cursor:pointer;font-size:13px;transition:.15s} | |
| .sym-btn:hover{border-color:var(--accent);background:var(--bg2)} | |
| /* workspace */ | |
| .workspace{flex:1;display:flex;flex-direction:column;overflow-y:auto;overflow-x:hidden;height:100%;min-height:0} | |
| .input-section{padding:20px 24px;border-bottom:1px solid var(--border)} | |
| .input-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px} | |
| .input-header h2{font-size:17px;font-weight:500} | |
| .type-selector{display:flex;align-items:center;gap:8px} | |
| .type-selector select,.param-group input,.param-group select{padding:7px 10px;background:var(--bg3);border:1px solid var(--border);border-radius:6px;color:var(--text1);font-size:13px} | |
| .demo-picker{display:flex;align-items:center;gap:10px;margin-bottom:14px;padding:10px 12px;background:var(--bg3);border:1px solid var(--border);border-radius:8px} | |
| .demo-picker label{font-size:13px;color:var(--text2);font-weight:600;flex-shrink:0} | |
| .demo-picker select{flex:1;min-width:220px;padding:8px 10px;background:var(--bg2);border:1px solid var(--border);border-radius:6px;color:var(--text1);font-size:13px} | |
| .math-input-container{margin-bottom:14px} | |
| #mathInput{width:100%;min-height:84px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:18px;padding:12px 14px;background:var(--bg3);border:2px solid var(--border);border-radius:8px;color:var(--text1);resize:vertical;line-height:1.35} | |
| #mathInput:focus{border-color:var(--accent);outline:none} | |
| .input-copy-tools{display:flex;gap:8px;margin-top:8px} | |
| .params-section{display:flex;gap:20px;margin-bottom:14px;flex-wrap:wrap} | |
| .param-group{display:flex;align-items:center;gap:6px} | |
| .param-group.hidden{display:none} | |
| .param-group label{font-size:13px;color:var(--text2)} | |
| .param-group input{width:70px} | |
| .input-actions-row{display:flex;gap:14px;align-items:stretch;justify-content:space-between;flex-wrap:wrap} | |
| .action-buttons{display:flex;gap:10px;align-items:flex-start} | |
| .quick-symbols{flex:1;min-width:380px;background:var(--bg3);border:1px solid var(--border);border-radius:10px;padding:10px 12px;display:flex;flex-direction:column;gap:8px} | |
| .quick-symbols-head{font-size:11px;text-transform:uppercase;color:var(--text2);letter-spacing:.9px} | |
| .quick-symbol-tabs{display:flex;gap:6px;flex-wrap:wrap} | |
| .quick-symbol-tab{padding:5px 10px;background:var(--bg2);border:1px solid var(--border);border-radius:999px;color:var(--text2);font-size:12px;cursor:pointer} | |
| .quick-symbol-tab.active,.quick-symbol-tab:hover{border-color:var(--accent);background:rgba(233,69,96,.14);color:#fff} | |
| .quick-symbol-grid{display:flex;flex-wrap:wrap;gap:6px} | |
| .quick-symbol-grid .sym-btn{padding:5px 10px;font-size:13px;border-radius:6px} | |
| .btn{padding:10px 22px;border:none;border-radius:7px;font-size:14px;font-weight:500;cursor:pointer;display:flex;align-items:center;gap:7px;transition:.2s} | |
| .btn-primary{background:var(--accent);color:#fff} | |
| .btn-primary:hover{background:var(--accent2);transform:translateY(-1px)} | |
| .btn-secondary{background:var(--bg3);color:var(--text1);border:1px solid var(--border)} | |
| .btn-secondary:hover{border-color:var(--text2)} | |
| .btn-small{padding:7px 14px;font-size:12px} | |
| .btn:disabled{opacity:.45;cursor:not-allowed} | |
| button,.btn,.tab,.learning-topic-btn,.learning-related-btn,.related-learning-link{user-select:text} | |
| .katex,.katex *{user-select:text} | |
| /* pretty inline math rendering for non-KaTeX text surfaces */ | |
| sup{font-size:.72em;line-height:0;vertical-align:super} | |
| sub{font-size:.72em;line-height:0;vertical-align:sub} | |
| .math-frac{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;vertical-align:middle;line-height:1.05;margin:0 .08em} | |
| .math-frac-num,.math-frac-den{display:block;padding:0 .2em;white-space:nowrap} | |
| .math-frac-bar{display:block;width:100%;min-width:1.15em;border-top:1.4px solid currentColor;margin:.07em 0} | |
| /* output */ | |
| .output-section{flex:0 0 auto;display:flex;flex-direction:column;overflow:visible} | |
| .tabs{display:flex;padding:0 24px;border-bottom:1px solid var(--border)} | |
| .tab{padding:14px 22px;background:none;border:none;color:var(--text2);font-size:13px;cursor:pointer;position:relative;transition:.2s} | |
| .tab:hover{color:var(--text1)} | |
| .tab.active{color:var(--accent)} | |
| .tab.active::after{content:'';position:absolute;bottom:-1px;left:0;right:0;height:2px;background:var(--accent)} | |
| .tab-content{flex:0 0 auto;padding:20px 24px;overflow:visible;display:none} | |
| .tab-content.active{display:flex;flex-direction:column} | |
| #animationTab.tab-content.active{overflow:visible;min-height:0} | |
| #animVisualWrap{flex:0 0 auto} | |
| /* result */ | |
| .result-display{padding:18px;background:var(--bg3);border-radius:8px;margin-bottom:18px;font-size:20px;text-align:center;min-height:60px;display:flex;align-items:center;justify-content:center} | |
| .result-display .placeholder{color:var(--text2);font-size:14px;font-weight:400} | |
| .result-display .katex{font-size:24px} | |
| .result-display{overflow:auto;max-width:100%} | |
| .result-display .katex-display{overflow:auto;max-width:100%;padding-bottom:4px} | |
| .result-display.copyable{cursor:copy} | |
| .result-display, .result-display *{user-select:text} | |
| .related-learning-panel{margin-bottom:14px;border:1px solid var(--border);border-radius:8px;background:var(--bg3);padding:10px 12px} | |
| .related-learning-panel.hidden{display:none} | |
| .related-learning-title{font-size:12px;color:var(--text2);text-transform:uppercase;letter-spacing:.8px;margin-bottom:8px} | |
| .related-learning-links{display:flex;flex-wrap:wrap;gap:8px} | |
| .related-learning-link{border:1px solid var(--border);background:var(--bg2);color:var(--text1);border-radius:999px;padding:7px 11px;font-size:12px;cursor:pointer} | |
| .related-learning-link:hover{border-color:var(--accent)} | |
| /* steps */ | |
| .steps-container{display:flex;flex-direction:column;gap:10px;flex:0 0 auto;overflow:visible} | |
| .step-card{padding:14px 16px;background:var(--bg2);border:1px solid var(--border);border-radius:8px;transition:.35s;opacity:1} | |
| .step-card.highlight{border-color:var(--accent);box-shadow:0 0 18px rgba(233,69,96,.25)} | |
| .step-card .step-header{display:flex;align-items:center;gap:10px;margin-bottom:10px} | |
| .step-number{width:26px;height:26px;background:var(--accent);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;flex-shrink:0} | |
| .step-rule{padding:3px 9px;background:var(--bg3);border-radius:4px;font-size:11px;color:var(--text2);text-transform:capitalize} | |
| .step-description{color:var(--text2);font-size:13px;margin-bottom:10px;line-height:1.5} | |
| .step-math{display:flex;align-items:center;gap:14px;flex-wrap:wrap} | |
| .step-math .arrow{color:var(--accent);font-size:20px;flex-shrink:0} | |
| .step-math .before,.step-math .after{font-size:16px} | |
| .step-math .before,.step-math .after{max-width:100%;overflow:auto} | |
| /* graph */ | |
| #graphCanvas{width:100%;max-width:886px;background:var(--bg3);border-radius:8px;display:block;margin:0 auto 14px} | |
| #animCanvas{width:100%;max-width:700px;background:var(--bg3);border-radius:8px;display:block;margin:0 auto 14px} | |
| .graph-controls,.animation-controls{display:flex;justify-content:center;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:8px} | |
| .animation-controls input[type="range"]{width:90px;accent-color:var(--accent)} | |
| .animation-controls select{padding:6px 9px;background:var(--bg2);border:1px solid var(--border);border-radius:6px;color:var(--text1);font-size:12px} | |
| .animation-menu{flex:0 0 auto;min-height:140px;overflow:visible;padding-right:0} | |
| .step-indicator{text-align:center;color:var(--text2);font-size:13px;margin-top:4px} | |
| .anim-related{display:flex;justify-content:center;margin:6px 0 8px} | |
| .anim-related-menu{margin-top:8px;display:flex;flex-wrap:wrap;justify-content:center;gap:8px;border:1px solid var(--border);border-radius:8px;background:var(--bg3);padding:10px;max-width:760px} | |
| .anim-related-menu.hidden{display:none} | |
| /* animation stage */ | |
| .anim-stage{background:var(--bg3);border-radius:8px;padding:30px 24px;margin-bottom:14px;text-align:center;min-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;position:relative} | |
| .anim-math-display{font-size:24px;transition:opacity .9s,transform .9s;min-height:170px;position:relative;width:100%;display:flex;align-items:center;justify-content:center;overflow:visible} | |
| .anim-math-display:empty{opacity:0} | |
| .anim-math-display.fade-out{opacity:0;transform:translateY(-10px)} | |
| .anim-math-display.fade-in{opacity:1;transform:translateY(0)} | |
| .anim-transition-frame{position:relative;width:100%;min-height:160px;display:flex;align-items:center;justify-content:center} | |
| .anim-compare{display:flex;align-items:center;justify-content:center;gap:26px;flex-wrap:nowrap;min-height:120px;max-width:100%;overflow:auto;padding-bottom:4px} | |
| .anim-eq{opacity:1;transition:opacity .7s ease,transform .7s ease} | |
| .anim-eq.prev{opacity:.82} | |
| .anim-eq.next{opacity:0;transform:translateY(20px)} | |
| .anim-eq.next.enter{opacity:1;transform:translateY(0)} | |
| .anim-eq{max-width:100%;overflow:auto} | |
| .anim-arrow{font-size:34px;color:var(--accent);font-weight:700;opacity:.55;transform:scale(.9);transition:opacity .7s ease,transform .7s ease} | |
| .anim-arrow.enter{opacity:1;transform:scale(1)} | |
| .anim-motion-canvas{position:absolute;inset:0;pointer-events:none} | |
| .anim-eq.settled{position:relative;left:auto;top:auto;transform:none;opacity:1} | |
| .anim-rule-badge{display:inline-flex;align-items:center;justify-content:center;min-height:24px;padding:5px 14px;border-radius:999px;font-size:12px;font-weight:700;letter-spacing:.35px;line-height:1;opacity:0;transform:translateY(2px);transition:opacity .25s ease,transform .25s ease,background-color .2s ease,color .2s ease} | |
| .anim-rule-badge.rule{background:var(--accent);color:#ffffff} | |
| .anim-rule-badge.solution{background:#22c55e;color:#062e14} | |
| .anim-rule-badge.visible{opacity:1} | |
| .anim-rule-badge.visible{transform:translateY(0)} | |
| .anim-description{font-size:13px;color:var(--text2);opacity:0;transition:opacity .4s} | |
| .anim-description.visible{opacity:1} | |
| .anim-final-solution{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;min-height:140px} | |
| .anim-final-title{font-size:13px;letter-spacing:1.2px;text-transform:uppercase;color:#22c55e;font-weight:700} | |
| .anim-steps-panel{margin-top:10px;border:1px solid var(--border);border-radius:8px;background:var(--bg3);max-height:none;overflow-y:visible} | |
| .anim-step-item{display:flex;flex-direction:column;gap:4px;align-items:flex-start;width:100%;padding:10px 12px;background:transparent;border:0;border-left:3px solid transparent;color:var(--text1);text-align:left;cursor:pointer;border-bottom:1px solid rgba(45,58,89,.5)} | |
| .anim-step-item:last-child{border-bottom:0} | |
| .anim-step-item:hover{background:rgba(255,255,255,.03)} | |
| .anim-step-item.active{border-left-color:var(--accent);background:rgba(233,69,96,.1)} | |
| .anim-step-num{font-size:11px;color:var(--text2);min-width:38px} | |
| .anim-step-text{font-size:12px;line-height:1.35;color:var(--text2)} | |
| .anim-step-detail{margin-top:5px;font-size:12px;color:var(--text1);display:flex;align-items:center;gap:8px;flex-wrap:wrap} | |
| .anim-step-detail .math{font-size:12px} | |
| .anim-step-detail .arr{color:var(--accent);font-weight:700} | |
| /* learning tab */ | |
| .learning-screen-wrap{height:100%;display:flex;flex-direction:column;padding:18px 20px 20px;overflow-y:auto} | |
| .learning-screen-head{margin-bottom:14px} | |
| .learning-screen-head h2{font-size:24px} | |
| .learning-screen-head p{font-size:14px;color:var(--text2);margin-top:5px} | |
| .learning-mode-tabs{display:flex;gap:8px;margin-bottom:12px} | |
| .learning-mode-btn{padding:8px 12px;border:1px solid var(--border);border-radius:999px;background:var(--bg2);color:var(--text2);font-size:12px;font-weight:600;cursor:pointer} | |
| .learning-mode-btn.active{background:rgba(233,69,96,.15);border-color:var(--accent);color:#fff} | |
| .learning-mode-btn[data-learning-mode="capacity"]{display:none} | |
| .learning-mode{display:none} | |
| .learning-mode.active{display:block} | |
| .learning-home{background:linear-gradient(180deg,#101937,#0d142b);border:1px solid var(--border);border-radius:14px;padding:20px;min-height:620px;display:flex;flex-direction:column;gap:16px} | |
| .learning-home-hero{padding:16px 18px;border:1px solid rgba(255,255,255,.08);border-radius:12px;background:radial-gradient(120% 140% at 90% 0%, rgba(233,69,96,.22), rgba(233,69,96,.02) 40%),rgba(255,255,255,.02)} | |
| .learning-home-hero h3{font-size:28px;line-height:1.2;margin-bottom:8px} | |
| .learning-home-hero p{font-size:15px;line-height:1.6;color:#d4dae4;max-width:920px} | |
| .learning-home-grid{display:grid;grid-template-columns:repeat(3,minmax(220px,1fr));gap:12px} | |
| .learning-home-card{padding:16px;border:1px solid var(--border);border-radius:12px;background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.01));color:var(--text1);cursor:pointer;text-align:left;display:flex;flex-direction:column;gap:10px;transition:.2s} | |
| .learning-home-card:hover{border-color:var(--accent);transform:translateY(-1px)} | |
| .learning-home-kicker{font-size:11px;letter-spacing:.8px;color:#fca5b2;text-transform:uppercase} | |
| .learning-home-card h4{font-size:18px;line-height:1.25} | |
| .learning-home-card p{font-size:13px;line-height:1.55;color:#c5cdd9;min-height:58px} | |
| .learning-home-card span{font-size:12px;font-weight:700;color:#ffd4db} | |
| .learning-home-stats{display:flex;gap:10px;flex-wrap:wrap} | |
| .learning-home-pill{padding:8px 12px;border:1px solid rgba(255,255,255,.1);border-radius:999px;background:rgba(255,255,255,.03);font-size:12px;color:#d7dce8} | |
| .learning-shell{display:grid;grid-template-columns:minmax(260px,320px) 1fr;gap:16px;min-height:620px} | |
| .pathways-shell{grid-template-columns:minmax(240px,300px) 1fr} | |
| .pathways-shell.collapsed{grid-template-columns:56px 1fr} | |
| .pathways-shell.collapsed .learning-sidebar{display:flex;max-height:88vh} | |
| .pathways-shell.collapsed .learning-topic-list, | |
| .pathways-shell.collapsed .learning-sidebar-head input, | |
| .pathways-shell.collapsed .learning-sidebar-head h3, | |
| .pathways-shell.collapsed #pathwayPickerToggleBtn, | |
| .pathways-shell.collapsed #selectedPathwayLabel, | |
| .pathways-shell.collapsed #pathwayPickerWrap, | |
| .pathways-shell.collapsed .learning-sidebar .learning-sidebar-head + .learning-topic-list, | |
| .pathways-shell.collapsed .learning-sidebar .learning-sidebar-head:nth-of-type(2){display:none} | |
| .pathways-shell.collapsed .learning-sidebar-head{padding:10px;min-height:56px;justify-content:center;align-items:center} | |
| .pathways-shell.collapsed .learning-sidebar-head-row{justify-content:center} | |
| .pathways-shell.collapsed .pathway-collapse-btn{padding:8px 9px;font-size:0} | |
| .pathways-shell.collapsed .pathway-collapse-btn::after{content:"Show";font-size:11px;font-weight:600;letter-spacing:.3px} | |
| .learning-sidebar{background:var(--bg3);border:1px solid var(--border);border-radius:10px;overflow:hidden;display:flex;flex-direction:column;max-height:72vh} | |
| .learning-sidebar-head{padding:14px;border-bottom:1px solid var(--border);display:flex;flex-direction:column;gap:9px} | |
| .learning-sidebar-head-row{display:flex;align-items:center;justify-content:space-between;gap:8px} | |
| .learning-sidebar-head h3{font-size:14px;font-weight:600} | |
| .learning-sidebar-head input{padding:8px 10px;background:var(--bg2);border:1px solid var(--border);border-radius:8px;color:var(--text1);font-size:13px} | |
| .learning-view-tabs{display:flex;padding:12px 14px;gap:8px;border-bottom:1px solid var(--border)} | |
| .learning-view-btn{flex:1;padding:8px 10px;border:1px solid var(--border);border-radius:8px;background:var(--bg2);color:var(--text2);cursor:pointer;font-size:12px;font-weight:600} | |
| .learning-view-btn.active{border-color:var(--accent);background:rgba(233,69,96,.12);color:#fff} | |
| .learning-category-chips{display:flex;gap:8px;flex-wrap:wrap;padding:12px 14px;border-bottom:1px solid var(--border)} | |
| .learning-chip{padding:6px 10px;border:1px solid var(--border);border-radius:999px;background:var(--bg2);color:var(--text2);font-size:12px;cursor:pointer} | |
| .learning-chip.active,.learning-chip:hover{border-color:var(--accent);color:var(--text1)} | |
| .learning-chip-note{font-size:12px;color:var(--text2)} | |
| .learning-topic-list{padding:8px;display:flex;flex-direction:column;gap:8px;overflow-y:auto} | |
| .learning-topic-btn{background:var(--bg2);border:1px solid var(--border);border-radius:8px;color:var(--text1);text-align:left;padding:10px;display:flex;flex-direction:column;gap:5px;cursor:pointer} | |
| .learning-topic-btn:hover,.learning-topic-btn.active{border-color:var(--accent)} | |
| .learning-topic-title{font-size:13px;font-weight:600} | |
| .learning-topic-summary{font-size:12px;color:var(--text2);line-height:1.4} | |
| .learning-topic-progress{display:inline-block;margin-top:6px;padding:3px 8px;font-size:11px;font-weight:600;color:var(--accent);background:rgba(233,69,96,.12);border:1px solid rgba(233,69,96,.3);border-radius:999px;letter-spacing:.2px;align-self:flex-start} | |
| /* Inline confirm popup that appears below a chapter card on click. | |
| Small, in-flow row (not a modal); flex-children so it doesn't push | |
| the rest of the chapter list down dramatically. The green check is | |
| the primary action (load + scroll); the muted-blue Cancel dismisses. */ | |
| .chapter-confirm-popup{display:flex;align-items:center;justify-content:space-between;gap:8px;margin:4px 0;padding:8px 10px;background:var(--bg2);border:1px solid var(--border);border-radius:8px;box-shadow:0 2px 6px rgba(0,0,0,.3);opacity:0;transform:translateY(-4px);transition:opacity .15s ease,transform .15s ease;font-size:12px;color:var(--text2)} | |
| .chapter-confirm-popup.open{opacity:1;transform:translateY(0)} | |
| .chapter-confirm-msg{flex:1;line-height:1.3} | |
| .chapter-confirm-actions{display:flex;align-items:center;gap:6px;flex-shrink:0} | |
| .chapter-confirm-yes{width:32px;height:32px;padding:0;border:none;border-radius:50%;background:#22c55e;color:#062e14;font-size:16px;font-weight:700;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .15s ease,transform .15s ease} | |
| .chapter-confirm-yes:hover{background:#16a34a;transform:scale(1.06)} | |
| .chapter-confirm-no{padding:6px 12px;border:1px solid rgba(102,126,234,.4);border-radius:6px;background:rgba(102,126,234,.18);color:#c5cdd9;font-size:12px;cursor:pointer;transition:background .15s ease,border-color .15s ease} | |
| .chapter-confirm-no:hover{background:rgba(102,126,234,.28);border-color:rgba(102,126,234,.6);color:#fff} | |
| .learning-topic-empty{padding:14px;color:var(--text2);font-size:13px} | |
| .learning-detail{background:var(--bg3);border:1px solid var(--border);border-radius:10px;padding:18px;overflow-y:auto;max-height:72vh;display:flex;flex-direction:column;gap:14px} | |
| .pathways-shell .learning-detail{max-height:90vh} | |
| .learning-detail-head h2{font-size:22px;margin-bottom:8px} | |
| .learning-detail-head p{color:var(--text2);font-size:14px;line-height:1.5} | |
| .learning-block{background:rgba(255,255,255,.02);border:1px solid var(--border);border-radius:10px;padding:14px} | |
| .learning-block h3{font-size:12px;color:var(--text2);text-transform:uppercase;letter-spacing:.8px;margin-bottom:10px} | |
| .learning-block p{line-height:1.55} | |
| .learning-block.collapsible{padding:0;overflow:hidden} | |
| .learning-block-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 14px;background:transparent;border:0;color:var(--text1);cursor:pointer;text-align:left} | |
| .learning-block-toggle h3{margin:0} | |
| .learning-block-caret{font-size:13px;color:var(--text2);transition:transform .2s} | |
| .learning-block-content{padding:0 14px 14px} | |
| .learning-block.collapsed .learning-block-content{display:none} | |
| .learning-block.collapsed .learning-block-caret{transform:rotate(-90deg)} | |
| .learning-mini-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:10px} | |
| .learning-mini-card{background:var(--bg2);border:1px solid var(--border);border-radius:8px;padding:10px} | |
| .learning-mini-head{font-size:13px;font-weight:600;margin-bottom:5px} | |
| .learning-mini-body{font-size:12px;color:var(--text2);line-height:1.45} | |
| .learning-example-grid{display:grid;grid-template-columns:1fr;gap:12px} | |
| .learning-example-card{background:var(--bg2);border:1px solid var(--border);border-radius:8px;padding:12px;display:flex;flex-direction:column;gap:10px} | |
| .learning-example-card h4{font-size:15px} | |
| .learning-example-problem{font-size:13px;color:#d9dde3;padding:8px 10px;background:#101730;border:1px solid var(--border);border-radius:6px;overflow:auto} | |
| .learning-example-steps{display:flex;flex-direction:column;gap:8px} | |
| .learning-example-step{border-left:3px solid #2a3659;padding-left:10px} | |
| .learning-example-step-title{font-size:13px;font-weight:600} | |
| .learning-example-step-explain{font-size:12px;color:var(--text2);margin-top:3px;line-height:1.45} | |
| .learning-example-step-math{font-size:12px;margin-top:4px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;overflow:auto} | |
| .learning-empty,.learning-empty-inline,.learning-example-step-empty{color:var(--text2);font-size:13px;line-height:1.5} | |
| .learning-related-row{display:flex;flex-wrap:wrap;gap:8px} | |
| .learning-related-btn{padding:7px 10px;border:1px solid var(--border);border-radius:999px;background:var(--bg2);color:var(--text1);font-size:12px;cursor:pointer} | |
| .learning-related-btn:hover{border-color:var(--accent)} | |
| .learning-slide-stage{border:1px solid var(--border);border-radius:12px;background:linear-gradient(180deg,#0f1530,#0d1228);padding:26px;display:flex;flex-direction:column} | |
| .learning-stage-top{display:flex;gap:8px;justify-content:flex-end;align-items:center;margin:0 0 12px;flex-wrap:wrap} | |
| .learning-stage-bottom{display:flex;gap:8px;justify-content:space-between;align-items:center;margin-top:18px;padding-top:14px;border-top:1px solid rgba(255,255,255,.08)} | |
| .learning-slide-title{font-size:22px;font-weight:700;line-height:1.2;margin-bottom:8px} | |
| .learning-slide-title.compact{font-size:19px;line-height:1.25} | |
| .learning-slide-title.worked{font-size:18px;line-height:1.25} | |
| .learning-slide-sub{font-size:12px;color:var(--text2);margin-bottom:12px;text-transform:uppercase;letter-spacing:.8px} | |
| .learning-slide-visual{border:1px solid rgba(255,255,255,.08);border-radius:12px;background:rgba(6,10,24,.30);padding:10px 12px;margin:0 auto 14px;min-height:0;display:flex;align-items:center;justify-content:center;color:var(--text2);font-size:14px;width:fit-content;max-width:92%} | |
| /* Loading state with no rendered content yet: collapse to invisible | |
| so the user doesn't see a brief empty box flash before the image | |
| pops in. Once renderLearningSlideVisual populates the host (or | |
| _showSlideVisualUnavailable fills it with a fallback message), | |
| :empty stops matching and the styled box returns. */ | |
| .learning-slide-visual.loading:empty{border:none;background:transparent;padding:0;margin:0} | |
| .learning-slide-visual.loading{opacity:.88} | |
| .learning-slide-visual-img{display:block;width:auto;max-width:100%;height:auto;border-radius:10px;border:1px solid rgba(255,255,255,.06);image-rendering:auto} | |
| .learning-slide-text{display:none} | |
| .learning-slide-text.show{display:block;margin-top:8px} | |
| .learning-block-card{border:none;border-radius:0;background:transparent;padding:8px 0;margin-bottom:10px;font-size:15px;line-height:1.62;color:#f3f6ff} | |
| .learning-block-card:last-child{margin-bottom:0} | |
| .learning-block-card.example, | |
| .learning-block-card.problem, | |
| .learning-block-card.step{border-left:none} | |
| .learning-quiz-gate,.learning-test-panel{margin-top:12px;border:1px solid var(--border);border-radius:10px;background:var(--bg3);padding:12px} | |
| .learning-quiz-title,.learning-test-title{font-size:13px;text-transform:uppercase;letter-spacing:.8px;color:var(--text2);margin-bottom:8px} | |
| .learning-question{margin-bottom:10px;padding:10px;border:1px solid rgba(255,255,255,.08);border-radius:8px;background:rgba(255,255,255,.02)} | |
| .learning-question:last-child{margin-bottom:0} | |
| .learning-q-prompt{font-size:13px;font-weight:600;margin-bottom:8px} | |
| .learning-q-choice{display:block;margin:4px 0;font-size:12px;color:var(--text2)} | |
| .learning-q-meta{font-size:12px;color:var(--text2);margin-top:6px} | |
| .glossary-link{color:#7dd3fc;text-decoration:underline;text-decoration-style:dotted;cursor:pointer} | |
| .glossary-chip{padding:6px 10px;border:1px solid var(--border);border-radius:999px;background:var(--bg2);color:var(--text1);font-size:12px} | |
| .is-hidden{display:none} | |
| /* Course picker modal: opens when user taps "Change Course" in the | |
| pathways sidebar. Sidebar always shows just the active course | |
| label + chapter list; pathway selection happens here. */ | |
| .pathway-picker-modal{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;padding:24px} | |
| .pathway-picker-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.55);cursor:pointer} | |
| .pathway-picker-dialog{position:relative;background:var(--bg2);border:1px solid var(--border);border-radius:14px;max-width:560px;width:100%;max-height:80vh;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.5)} | |
| .pathway-picker-head{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--border);background:var(--bg3)} | |
| .pathway-picker-head h3{font-size:15px;font-weight:600;letter-spacing:.3px;text-transform:uppercase;color:var(--text2);margin:0} | |
| .pathway-picker-close{background:none;border:none;color:var(--text1);font-size:24px;line-height:1;cursor:pointer;padding:0 6px} | |
| .pathway-picker-close:hover{color:var(--accent)} | |
| .pathway-picker-modal .learning-topic-list{padding:14px 18px 18px;overflow-y:auto;gap:8px} | |
| @media (max-width:768px){ | |
| .pathway-picker-modal{padding:0} | |
| .pathway-picker-dialog{max-width:100%;max-height:100vh;height:100vh;border-radius:0;border:none} | |
| } | |
| /* The 🎓 floating tutor opener is contextually about solver state. | |
| On the Learning screen its bottom-right anchor (bottom:120px on | |
| mobile after round-2) overlaps pathway chapter cards, and tapping | |
| it just lands the user on the round-2 "Load or solve a problem | |
| first" guard message. Hide the toggle entirely while the user is | |
| on Learning. The opener (and the panel + backdrop, if previously | |
| opened) re-appear automatically when the user switches back to | |
| the solver screen. !important defeats the tutor-panel.js's | |
| later-injected stylesheet. */ | |
| #learningScreen.active ~ .tutor-toggle{display:none} | |
| /* solver sidebar collapse — desktop/tablet only. | |
| When collapsed: hide the formula library and symbol palette but | |
| keep a thin 48px gutter strip on the left of the workspace, with | |
| a small round arrow button anchored inside it that re-opens the | |
| sidebar on click. The button reuses #toggleSolverSidebarBtn so | |
| the existing JS click handler still works. The 48px gutter | |
| prevents the floating-toggle approach's content overlap (the | |
| toggle would otherwise sit on top of the "Expression Input" | |
| header). Mobile (<=768px) is intentionally excluded — the mobile | |
| block at the bottom of this file hides the toggle entirely (the | |
| sidebar stacks above the workspace on phones, so collapsing has | |
| no useful effect). */ | |
| @media (min-width: 769px){ | |
| #solverAppContainer.solver-collapsed .sidebar{ | |
| width:48px; | |
| overflow:visible; | |
| } | |
| #solverAppContainer.solver-collapsed .formula-library, | |
| #solverAppContainer.solver-collapsed .symbol-palette, | |
| #solverAppContainer.solver-collapsed .logo > .logo-icon, | |
| #solverAppContainer.solver-collapsed .logo > .logo-text{ | |
| display:none; | |
| } | |
| #solverAppContainer.solver-collapsed .logo{ | |
| padding:14px 0 0 0; | |
| height:auto; | |
| border-bottom:none; | |
| flex-direction:column; | |
| align-items:center; | |
| overflow:visible; | |
| gap:0; | |
| } | |
| #solverAppContainer.solver-collapsed .sidebar-toggle-btn{ | |
| margin:0 auto; | |
| width:32px; | |
| height:32px; | |
| padding:0; | |
| font-size:0; | |
| border-radius:50%; | |
| border:1px solid var(--border); | |
| background:var(--bg3); | |
| color:var(--text1); | |
| cursor:pointer; | |
| display:flex; | |
| align-items:center; | |
| justify-content:center; | |
| box-shadow:0 1px 3px rgba(0,0,0,.25); | |
| transition:background-color .15s ease,border-color .15s ease,transform .15s ease; | |
| } | |
| #solverAppContainer.solver-collapsed .sidebar-toggle-btn:hover{ | |
| background:var(--bg2); | |
| border-color:var(--accent); | |
| transform:scale(1.08); | |
| } | |
| #solverAppContainer.solver-collapsed .sidebar-toggle-btn::after{ | |
| content:"›"; | |
| font-size:16px; | |
| font-weight:700; | |
| color:var(--text1); | |
| line-height:1; | |
| letter-spacing:0; | |
| } | |
| } | |
| /* Use a single primary scroll container in Pathways mode (outer wrap). */ | |
| .pathways-shell .learning-detail{max-height:none;overflow:visible} | |
| .pathways-shell .learning-sidebar{ | |
| max-height:86vh; | |
| overflow:hidden; | |
| } | |
| .pathways-shell .learning-topic-list{ | |
| overflow-y:auto; | |
| max-height:none; | |
| min-height:0; | |
| } | |
| /* pathways notes layout */ | |
| .learning-stage-layout{display:flex;gap:0;align-items:flex-start} | |
| .learning-stage-main{flex:1;min-width:0;padding-right:12px} | |
| .slide-notes-resizer{width:8px;cursor:col-resize;background:transparent;position:relative} | |
| .slide-notes-resizer::before{content:"";position:absolute;left:3px;top:0;bottom:0;width:2px;background:rgba(255,255,255,.10);border-radius:2px} | |
| .slide-notes-panel{position:relative;width:420px;min-width:300px;max-width:700px;background:var(--bg3);border:1px solid var(--border);border-radius:12px;display:flex;flex-direction:column;overflow:hidden} | |
| .slide-notes-head{padding:12px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:8px} | |
| .slide-notes-head h3{font-size:14px;font-weight:700} | |
| .slide-notes-body{padding:14px 16px;overflow:auto;max-height:76vh;display:flex;flex-direction:column;gap:12px;font-size:15px;line-height:1.7} | |
| .slide-notes-item{border:none;border-radius:0;background:transparent;padding:0;line-height:1.7} | |
| .slide-notes-item .k{display:inline-block;font-size:11px;color:var(--text2);text-transform:uppercase;letter-spacing:.7px;margin-bottom:3px} | |
| .slide-notes-tab{position:absolute;left:-34px;top:50%;transform:translateY(-50%) rotate(-90deg);padding:6px 10px;border:1px solid var(--border);border-bottom:none;background:var(--bg3);color:var(--text1);border-radius:8px 8px 0 0;cursor:pointer} | |
| .learning-stage-layout.notes-collapsed .slide-notes-panel{width:0;min-width:0;border:none;overflow:visible;background:transparent} | |
| .learning-stage-layout.notes-collapsed .slide-notes-head, | |
| .learning-stage-layout.notes-collapsed .slide-notes-body{display:none} | |
| .learning-stage-layout.notes-collapsed .slide-notes-resizer{display:none} | |
| .learning-stage-layout.notes-collapsed .slide-notes-tab{left:-22px} | |
| /* capacity mode */ | |
| .capacity-shell{display:grid;grid-template-columns:minmax(320px,420px) 1fr;gap:16px;min-height:760px} | |
| .capacity-controls label{font-size:13px;color:var(--text2)} | |
| .capacity-input{width:100%;min-height:260px;resize:vertical;background:var(--bg2);color:var(--text1);border:1px solid var(--border);border-radius:8px;padding:10px;font:13px/1.45 ui-monospace,SFMono-Regular,Menlo,monospace} | |
| .capacity-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap} | |
| .capacity-preview-pane{display:flex;flex-direction:column;gap:10px} | |
| .capacity-page-text{margin:0;background:var(--bg2);border:1px solid var(--border);border-radius:8px;padding:10px;max-height:220px;overflow:auto;white-space:pre-wrap;word-break:break-word;user-select:text} | |
| .capacity-report-output{width:100%;min-height:200px;max-height:280px;resize:vertical;background:var(--bg2);color:var(--text1);border:1px solid var(--border);border-radius:8px;padding:10px;font:12px/1.45 ui-monospace,SFMono-Regular,Menlo,monospace;user-select:text} | |
| #capacityPageText,#capacityPageText *{user-select:text} | |
| #capacityPreview,#capacityPreview *{user-select:none} | |
| @keyframes shake{0%,100%{transform:translateX(0)}20%,60%{transform:translateX(-6px)}40%,80%{transform:translateX(6px)}} | |
| .shake-input{animation:shake 0.45s ease;border-color:var(--accent)} | |
| @media (max-width: 1024px){ | |
| .quick-symbols{min-width:0;width:100%} | |
| .input-actions-row{flex-direction:column} | |
| .learning-home-grid{grid-template-columns:1fr} | |
| .learning-home-hero h3{font-size:23px} | |
| .learning-shell{grid-template-columns:1fr;min-height:0} | |
| .learning-sidebar,.learning-detail{max-height:none} | |
| .learning-stage-layout{flex-direction:column} | |
| .learning-stage-main{padding-right:0} | |
| .slide-notes-resizer{display:none} | |
| .slide-notes-panel{width:100%;max-width:none;min-width:0;margin-top:10px} | |
| .learning-stage-layout.notes-collapsed .slide-notes-panel{display:none} | |
| .capacity-shell{grid-template-columns:1fr} | |
| .screen-switcher{position:static} | |
| .app-screen{height:auto} | |
| } | |
| @media (max-width: 768px){ | |
| /* Natural page scroll; collapse to single column */ | |
| body{overflow:visible} | |
| .app-container{flex-direction:column} | |
| .sidebar{width:100%;max-height:280px;position:static;overflow-y:auto;border-right:none;border-bottom:1px solid var(--border);flex-shrink:0} | |
| /* Compact the sidebar logo block so the formula list shows in the strip */ | |
| .sidebar .logo{padding:10px 14px;gap:8px} | |
| .sidebar .logo-icon{font-size:1.4rem} | |
| .sidebar .logo-text{font-size:1.1rem} | |
| /* Hide the collapse toggle on mobile entirely — the layout already | |
| stacks, so "collapsing" the sidebar leaves nothing useful and the | |
| toggle goes with it. Don't apply the desktop solver-collapsed rule | |
| either; it would orphan the toggle button. */ | |
| #toggleSolverSidebarBtn{display:none} | |
| #solverAppContainer.solver-collapsed .sidebar{display:block} | |
| /* Same pattern for the pathways sidebar toggle: in single-column mobile | |
| the sidebar already stacks above the detail, so "Hide Sidebar" has | |
| no useful effect and tapping it leaves the layout in a broken | |
| 56px-wide first column. Hide the button and undo any collapsed | |
| grid that was carried in from a wider viewport. */ | |
| #togglePathwaySidebarBtn{display:none} | |
| .pathways-shell.collapsed{grid-template-columns:1fr} | |
| /* Tab strip horizontal scroll */ | |
| .tabs{overflow-x:auto;-webkit-overflow-scrolling:touch;flex-wrap:nowrap;padding:0 12px} | |
| /* Prevent forced horizontal overflow */ | |
| .demo-picker{min-width:0;flex-wrap:wrap} | |
| .demo-picker select{min-width:0} | |
| /* Tap-target audit (≥44px) */ | |
| .tab{min-height:44px;padding:15px 22px;flex-shrink:0} | |
| .demo-picker .btn{min-height:44px} | |
| .formula-item{min-height:44px;padding:12px 14px} | |
| /* Sticky category chips inside the scroll-bound 280px sidebar strip. | |
| Without this the chips (All / Derivatives / Integrals / Limits / | |
| Series) scroll out of view as the user browses formulas, forcing a | |
| scroll-up to switch category. background:var(--bg2) matches the | |
| sidebar so the formula-list doesn't bleed through; the small | |
| vertical padding gives the chips visual breathing room when stuck. | |
| z-index:5 sits well below the floating tutor toggle (z-index:9999) | |
| and the screen-switcher (z-index:30); chips and tutor are in | |
| different stacking contexts and at different y-positions, no | |
| overlap. (Round-3 audit fix.) */ | |
| .formula-library .category-list{ | |
| position:sticky; | |
| top:0; | |
| background:var(--bg2); | |
| padding:8px 0 6px; | |
| margin-top:-6px; | |
| margin-bottom:8px; | |
| z-index:5; | |
| } | |
| /* Type scaling (~30% reduction for headings / formula display) */ | |
| .input-header h2{font-size:12px} | |
| .result-display{font-size:14px} | |
| .result-display .katex{font-size:17px} | |
| .anim-math-display{font-size:17px;min-height:120px} | |
| .anim-stage{min-height:180px;padding:20px 14px} | |
| .anim-arrow{font-size:24px} | |
| .anim-compare{flex-wrap:wrap;gap:14px} | |
| /* Floating AI tutor button sits above the bottom action buttons on | |
| mobile so it does not overlap the Solve & Animate / Clear pair. | |
| Round-2 audit raised the offset from 88px to 120px because at 88px | |
| the button still overlapped Related Topics expand chevrons in | |
| learning detail views and the Delete button row in the solver | |
| input section. */ | |
| .tutor-toggle{bottom:120px;right:16px} | |
| } | |
| /* scrollbar */ | |
| ::-webkit-scrollbar{width:6px} | |
| ::-webkit-scrollbar-track{background:var(--bg2)} | |
| ::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px} | |
| ::-webkit-scrollbar-thumb:hover{background:var(--text2)} | |