:root{color:#1d1d1f;background:#f5f5f7;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}html{background:#f5f5f7}body{background:#f5f5f7;min-height:100vh;margin:0}button,input{font:inherit}button{cursor:pointer;color:inherit;border:0}.app-shell{background:#f5f5f7;min-height:100vh}.navbar{z-index:20;-webkit-backdrop-filter:blur(20px);background:#ffffffeb;border-bottom:1px solid #d2d2d7;align-items:center;gap:24px;height:56px;padding:0 40px;display:flex;position:fixed;inset:0 0 auto}.brand{color:#1d1d1f;letter-spacing:-.03em;white-space:nowrap;align-items:center;gap:8px;font-size:18px;font-weight:700;display:flex}.brand svg{color:#0071e3;stroke-width:2.2px}.navbar nav{align-items:center;gap:2px;display:flex}.navbar nav button{color:#6e6e73;letter-spacing:-.01em;background:0 0;border-radius:6px;padding:6px 12px;font-size:13px;font-weight:500;transition:color .12s,background .12s}.navbar nav button:hover{color:#1d1d1f;background:#f5f5f7}.navbar nav .nav-active{color:#0071e3;background:0 0;font-weight:600}.nav-actions{color:#6e6e73;align-items:center;gap:14px;margin-left:auto;display:flex}.nav-actions svg{cursor:pointer;transition:color .12s}.nav-actions svg:hover{color:#0071e3}.main{min-width:0;padding-top:0}.hero{background:#fff;align-items:flex-end;min-height:340px;padding:90px 64px 80px;display:flex;position:relative;overflow:hidden}.hero:before{content:"";background:var(--study-accent,#0071e3);height:4px;position:absolute;inset:0 0 auto}.hero:after{content:"";pointer-events:none;background:linear-gradient(#f5f5f700 0%,#f5f5f7 100%);height:80px;position:absolute;inset:auto 0 0}.topic-hero{min-height:300px;padding-top:100px}.hero-shadow{display:none}.hero-content{z-index:2;width:min(820px,90vw);position:relative}.home-hero .hero-content{width:min(560px,55vw)}.breadcrumb{color:#6e6e73;align-items:center;gap:5px;margin-bottom:18px;font-size:13px;display:flex}.breadcrumb button{color:#6e6e73;background:0 0;padding:0;font-size:13px;transition:color .12s}.breadcrumb button:hover{color:#0071e3}.breadcrumb span{color:#1d1d1f;font-weight:500}.breadcrumb svg{opacity:.4}.eyebrow{color:var(--study-accent,#0071e3);letter-spacing:.01em;background:0 0;border-radius:0;align-items:center;gap:6px;margin-bottom:10px;padding:0;font-size:13px;font-weight:600;display:inline-flex}.hero h1{letter-spacing:-.04em;color:#1d1d1f;max-width:780px;margin:0;font-size:clamp(28px,4vw,52px);font-weight:800;line-height:1.04}.hero p{color:#6e6e73;max-width:640px;margin:16px 0 14px;font-size:16px;line-height:1.6}.meta-row{flex-wrap:wrap;gap:8px;margin-bottom:22px;display:flex}.meta-row span{color:#6e6e73;background:#f5f5f7;border:1px solid #d2d2d7;border-radius:6px;padding:4px 10px;font-size:13px;font-weight:500}.hero-buttons{align-items:center;gap:10px;display:flex}.play-btn,.info-btn{letter-spacing:-.01em;border-radius:980px;align-items:center;gap:8px;padding:10px 20px;font-size:14px;font-weight:600;transition:all .14s;display:inline-flex}.play-btn{color:#fff;background:#0071e3}.play-btn:hover{background:#0077ed}.play-btn:active{background:#006edb}.info-btn{color:#0071e3;background:0 0;border:1px solid #d2d2d7}.info-btn:hover{background:#f5f5f7}.play-btn.small{padding:8px 16px;font-size:13px}.home-hero{justify-content:space-between;align-items:center;gap:48px;min-height:420px;padding:96px 64px 72px}.hero-stats{align-items:center;gap:24px;margin:28px 0 32px;display:flex}.hero-stat span{letter-spacing:-.04em;color:#1d1d1f;font-size:32px;font-weight:800;line-height:1;display:block}.hero-stat p{color:#6e6e73;margin:4px 0 0;font-size:12.5px;font-weight:500}.hero-stat-divider{background:#d2d2d7;flex-shrink:0;width:1px;height:36px}.home-hero-visual{z-index:2;flex-direction:column;gap:12px;display:flex;position:absolute;top:50%;right:64px;transform:translateY(-50%)}.hhv-card{color:#1d1d1f;white-space:nowrap;background:#fff;border-radius:16px;align-items:center;gap:12px;padding:14px 20px;font-size:14px;font-weight:600;display:flex;box-shadow:0 4px 20px #00000014,0 1px 4px #0000000a}.hhv-card svg{flex-shrink:0}.hhv-card-1{margin-left:24px}.hhv-card-1 svg{color:#2563eb}.hhv-card-2{margin-left:0}.hhv-card-2 svg{color:#7c3aed}.hhv-card-3{margin-left:40px}.hhv-card-3 svg{color:#059669}@media (width<=900px){.home-hero-visual{display:none}.home-hero{padding-right:40px}}.content{z-index:4;margin-top:36px;padding:0 64px 80px;position:relative}.row{margin-bottom:40px}.row-head{align-items:center;gap:6px;margin-bottom:16px;display:flex}.row-head h2{letter-spacing:-.03em;color:#1d1d1f;margin:0;font-size:21px;font-weight:700}.row-head svg{opacity:.3;color:#6e6e73}.study-cards-grid{grid-template-columns:repeat(3,1fr);gap:14px;display:grid}.study-card{text-align:left;background:#fff;border:none;border-radius:24px;min-height:180px;transition:box-shadow .22s,transform .22s;position:relative;overflow:hidden;box-shadow:0 2px 12px #00000012,0 1px 3px #0000000d}.study-card:hover{transform:translateY(-4px);box-shadow:0 12px 36px #00000021,0 2px 6px #0000000f}.study-card-overlay{display:none}.study-card-body{color:#1d1d1f;flex-direction:column;gap:7px;height:100%;padding:22px 22px 18px;display:flex}.study-card-body svg{color:var(--accent,#0071e3)}.study-card-body b{letter-spacing:-.02em;font-size:18px;font-weight:700}.study-card-body p{color:#6e6e73;flex:1;margin:0;font-size:13.5px;line-height:1.5}.study-card-cta{color:var(--accent,#0071e3);align-items:center;gap:3px;margin-top:6px;font-size:13px;font-weight:600;display:inline-flex}.study-card--inactive{opacity:.5;cursor:not-allowed;pointer-events:none;filter:grayscale(.6)}.study-card-cta--soon{color:#6e6e73;background:#f5f5f7;border:1px solid #d2d2d7;border-radius:20px;align-items:center;gap:3px;margin-top:6px;padding:3px 10px;font-size:12px;font-weight:600;display:inline-flex}.lecture-card--inactive{opacity:.45;cursor:not-allowed;pointer-events:none;filter:grayscale(.7)}.lecture-card-soon{color:#6e6e73;background:#f5f5f7;border:1px solid #d2d2d7;border-radius:20px;margin-top:6px;padding:2px 9px;font-size:11px;font-weight:600;display:inline-block}.card-scroller,.resource-scroller{overscroll-behavior-inline:contain;scrollbar-width:none;grid-auto-columns:minmax(240px,1fr);grid-auto-flow:column;gap:12px;padding:4px 4px 16px;display:grid;overflow-x:auto}.card-scroller::-webkit-scrollbar{display:none}.resource-scroller::-webkit-scrollbar{display:none}.scroller-wrap{position:relative}.scroll-arrow{z-index:2;color:#1d1d1f;cursor:pointer;opacity:0;pointer-events:none;background:#fff;border:1px solid #d2d2d7;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;transition:opacity .18s,box-shadow .18s;display:flex;position:absolute;top:50%;transform:translateY(-60%);box-shadow:0 2px 10px #00000014}.scroll-arrow-left{left:2px}.scroll-arrow-right{right:2px}.scroller-wrap:hover .scroll-arrow{opacity:1;pointer-events:auto}.scroll-arrow:hover{box-shadow:0 4px 16px #00000024}.lecture-card,.topic-card,.small-card,.resource-card,.detail-panel{background:#fff;border:none;box-shadow:0 2px 12px #00000012,0 1px 3px #0000000d}.lecture-card,.topic-card,.small-card{text-align:left;border-radius:20px;min-height:140px;padding:20px 22px;transition:box-shadow .2s,transform .2s;position:relative;overflow:hidden}.lecture-card:after,.topic-card:after{display:none}.lecture-card:hover,.topic-card:hover,.small-card:hover,.resource-card:hover{transform:translateY(-3px);box-shadow:0 10px 28px #0000001c,0 2px 6px #0000000f}.lecture-card.active,.topic-card.active{box-shadow:0 0 0 2px #0071e359,0 4px 16px #00000014}.lecture-card span,.episode{color:var(--study-accent,#0071e3);text-transform:uppercase;letter-spacing:.08em;margin-bottom:12px;font-size:10.5px;font-weight:700;display:inline-block}.lecture-card b,.topic-card b,.small-card b,.resource-card b{color:#1d1d1f;letter-spacing:-.01em;z-index:1;font-size:16px;font-weight:700;line-height:1.3;display:block;position:relative}.lecture-card p,.topic-card p,.small-card p,.resource-card p{color:#6e6e73;z-index:1;margin:8px 0 0;font-size:13.5px;line-height:1.5;position:relative}.mini-meta{color:#6e6e73;z-index:1;align-items:center;gap:6px;margin-top:12px;font-size:13px;display:flex;position:relative}.card-scroller.compact{grid-auto-columns:minmax(200px,250px)}.small-card{gap:6px;min-height:110px;display:grid}.small-card svg{color:var(--accent,#0071e3)}.detail-grid{grid-template-columns:1fr 1fr;gap:16px;margin-bottom:36px;display:grid}.detail-grid--3{grid-template-columns:1fr 1fr 1fr}.detail-panel{border-radius:24px;min-width:0;min-height:300px;padding:28px}.panel-title{color:#6e6e73;text-transform:uppercase;letter-spacing:.08em;align-items:center;gap:8px;margin-bottom:16px;font-size:12px;font-weight:600;display:flex}.panel-title svg{color:var(--study-accent,#0071e3);width:16px;height:16px}.detail-panel h2{letter-spacing:-.03em;color:#1d1d1f;margin:0 0 10px;font-size:22px;font-weight:700}.detail-panel p{color:#6e6e73;font-size:15px;line-height:1.68}.tags{flex-wrap:wrap;gap:7px;margin-top:18px;display:flex}.tags span{color:#6e6e73;background:#f5f5f7;border:1px solid #d2d2d7;border-radius:6px;padding:5px 11px;font-size:12.5px;font-weight:500}.youtube-wrapper{aspect-ratio:16/9;background:#1d1d1f;border:1px solid #d2d2d7;border-radius:12px;width:100%;margin:14px 0;position:relative;overflow:hidden}.youtube-wrapper iframe{border:0;width:100%;height:100%;position:absolute;inset:0}.youtube-placeholder{aspect-ratio:16/9;color:#aeaeb2;background:#f5f5f7;border:1px solid #d2d2d7;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;gap:10px;width:100%;margin:14px 0;display:flex}.youtube-placeholder-icon{color:#aeaeb2;background:#e5e5ea;border-radius:50%;justify-content:center;align-items:center;width:52px;height:52px;display:flex}.youtube-placeholder p{color:#aeaeb2;margin:0;font-size:.85rem}.resource-scroller{grid-auto-columns:minmax(210px,270px)}.resource-card{border-radius:14px;min-height:140px;padding:18px 20px;transition:all .18s}.resource-card svg{color:var(--study-accent,#0071e3);margin-bottom:8px}.resource-card span{color:var(--study-accent,#0071e3);text-transform:uppercase;letter-spacing:.08em;font-size:10.5px;font-weight:700}.resource-grid{grid-template-columns:1fr 1fr;gap:0;display:grid}.resource-grid-item{border-bottom:1px solid #f5f5f7;flex-direction:column;gap:3px;padding:12px 0;display:flex}.resource-grid-item b{color:#1d1d1f;font-size:.88rem;font-weight:600}.resource-grid-item p{color:#aeaeb2;margin:0;font-size:.78rem}.resource-type{letter-spacing:.08em;text-transform:uppercase;color:var(--study-accent,#0071e3);font-size:.68rem;font-weight:700}.study-tagline{color:var(--study-accent,#0071e3);margin:0 0 8px;font-size:1rem;font-style:italic;font-weight:600}.study-highlights{flex-direction:column;gap:7px;margin:10px 0 0;padding:0;list-style:none;display:flex}.study-highlights li{color:#6e6e73;align-items:center;gap:8px;font-size:.88rem;display:flex}.lecture-tile-grid{grid-template-columns:repeat(3,1fr);gap:18px;display:grid}.lecture-tile{aspect-ratio:4/5;text-align:left;color:#1d1d1f;cursor:pointer;background:#fff;border:none;border-radius:24px;flex-direction:column;justify-content:space-between;padding:26px 26px 22px;transition:box-shadow .22s,transform .22s;display:flex;overflow:hidden;box-shadow:0 2px 12px #00000012,0 1px 3px #0000000d}.lecture-tile:hover{transform:translateY(-4px);box-shadow:0 12px 36px #00000021,0 2px 6px #0000000f}.lecture-tile-body{flex-direction:column;flex-shrink:0;gap:5px;display:flex}.lecture-tile-level{text-transform:uppercase;letter-spacing:.1em;color:var(--accent,#0071e3);font-size:10.5px;font-weight:700}.lecture-tile-body b{letter-spacing:-.025em;color:#1d1d1f;font-size:17px;font-weight:800;line-height:1.2}.lecture-tile-body p{color:#aeaeb2;margin:0;font-size:12.5px}.lecture-tile-illustration{flex:1;justify-content:center;align-items:center;min-height:0;padding:12px 16px 4px;display:flex}.lecture-tile-illustration svg{width:100%;height:100%;max-height:100px;transition:transform .3s}.lecture-tile:hover .lecture-tile-illustration svg{transform:scale(1.06)translateY(-3px)}.lecture-tile-footer{border-top:1px solid #f0f0f2;flex-shrink:0;justify-content:space-between;align-items:flex-end;gap:10px;margin-top:4px;padding-top:14px;display:flex}.lecture-tile-desc{color:#6e6e73;flex:1;margin:0;font-size:12px;line-height:1.5}.lecture-tile-desc strong{color:#1d1d1f;font-weight:700}.lecture-tile-arrow{width:28px;height:28px;color:var(--accent,#0071e3);background:#f5f5f7;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;transition:background .15s,transform .2s;display:flex}.lecture-tile:hover .lecture-tile-arrow{background:color-mix(in srgb, var(--accent,#0071e3) 12%, #f5f5f7);transform:translate(3px)}@media (width<=1100px){.lecture-tile-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=760px){.lecture-tile-grid{grid-template-columns:repeat(2,1fr)}.lecture-tile{aspect-ratio:auto;min-height:320px}}.topic-tile-grid{grid-template-columns:repeat(3,1fr);gap:18px;display:grid}.topic-tile{aspect-ratio:4/5;text-align:left;color:#1d1d1f;cursor:pointer;background:#fff;border:none;border-radius:24px;flex-direction:column;justify-content:space-between;padding:26px 26px 22px;transition:box-shadow .22s,transform .22s;display:flex;overflow:hidden;box-shadow:0 2px 12px #00000012,0 1px 3px #0000000d}.topic-tile:hover{transform:translateY(-4px);box-shadow:0 12px 36px #00000021,0 2px 6px #0000000f}.topic-tile-body{flex-direction:column;flex-shrink:0;gap:5px;display:flex}.topic-tile-number{letter-spacing:.06em;color:var(--accent,#0071e3);font-size:10.5px;font-weight:700}.topic-tile-body b{letter-spacing:-.025em;color:#1d1d1f;font-size:16px;font-weight:800;line-height:1.25}.topic-tile-body p{color:#aeaeb2;-webkit-line-clamp:2;-webkit-box-orient:vertical;margin:0;font-size:12px;line-height:1.4;display:-webkit-box;overflow:hidden}.topic-tile-illustration{flex:1;justify-content:center;align-items:center;min-height:0;padding:10px 12px 4px;display:flex}.topic-tile-illustration svg{width:100%;height:100%;max-height:100px;transition:transform .3s}.topic-tile:hover .topic-tile-illustration svg{transform:scale(1.07)translateY(-3px)}.topic-tile-footer{border-top:1px solid #f0f0f2;flex-shrink:0;justify-content:space-between;align-items:flex-end;gap:10px;margin-top:4px;padding-top:14px;display:flex}.topic-tile-desc{color:#6e6e73;flex:1;margin:0;font-size:12px;line-height:1.5}.topic-tile-desc strong{color:#1d1d1f;font-weight:700}.topic-tile-arrow{width:28px;height:28px;color:var(--accent,#0071e3);background:#f5f5f7;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;transition:background .15s,transform .2s;display:flex}.topic-tile:hover .topic-tile-arrow{background:color-mix(in srgb, var(--accent,#0071e3) 12%, #f5f5f7);transform:translate(3px)}@media (width<=1100px){.topic-tile-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=760px){.topic-tile-grid{grid-template-columns:repeat(2,1fr)}.topic-tile{padding:18px}}.lecture-topic-list{flex-direction:column;gap:8px;max-width:840px;display:flex}.lecture-topic-item{text-align:left;color:#1d1d1f;background:#fff;border:1px solid #d2d2d7;border-radius:14px;align-items:center;gap:16px;padding:16px 20px;transition:box-shadow .15s,transform .15s;display:flex}.lecture-topic-item:hover{transform:translate(3px);box-shadow:0 4px 16px #00000014}.lti-index{background:var(--accent-bg,#f5f5f7);width:36px;height:36px;color:var(--accent,#0071e3);border:1px solid #d2d2d7;border-radius:9px;flex-shrink:0;justify-content:center;align-items:center;font-size:.9rem;font-weight:700;display:flex}.lti-body{flex:1;min-width:0}.lti-body b{color:#1d1d1f;letter-spacing:-.01em;margin-bottom:3px;font-size:.95rem;font-weight:700;display:block}.lti-body p{color:#aeaeb2;white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:.82rem;overflow:hidden}.lti-meta{flex-direction:column;flex-shrink:0;align-items:flex-end;gap:4px;display:flex}.lti-meta span{color:#aeaeb2;align-items:center;gap:5px;font-size:.78rem;display:flex}.lti-arrow{color:#d2d2d7;flex-shrink:0;transition:color .12s}.lecture-topic-item:hover .lti-arrow{color:#6e6e73}.sim-preview{cursor:pointer;border:1px solid #d2d2d7;border-radius:14px;flex-direction:column;gap:0;margin-top:12px;display:flex;overflow:hidden}.sim-preview-bg{background:#f5f5f7;height:190px;position:relative;overflow:hidden}.sim-preview-svg{opacity:.3;width:100%;height:100%;position:absolute;inset:0}.sim-preview-overlay{display:none}.sim-preview-content{flex-direction:column;justify-content:center;align-items:center;gap:8px;transition:transform .2s;display:flex;position:absolute;inset:0}.sim-preview:hover .sim-preview-content{transform:scale(1.02)}.sim-preview-icon{color:#0071e3;background:#fff;border:1px solid #d2d2d7;border-radius:50%;justify-content:center;align-items:center;width:56px;height:56px;display:flex}.sim-preview-label{letter-spacing:.08em;text-transform:uppercase;color:#6e6e73;margin:0;font-size:.72rem;font-weight:700}.sim-preview-sub{color:#aeaeb2;margin:0;font-size:.82rem}.sim-launch-btn{color:#fff;cursor:pointer;letter-spacing:-.01em;background:#0071e3;border:none;justify-content:center;align-items:center;gap:8px;width:100%;padding:13px;font-size:.9rem;font-weight:600;transition:background .15s;display:flex}.sim-launch-btn:hover{background:#0077ed}.sim-btn{margin:12px 0 4px}.sim-overlay{z-index:9999;background:#0009;flex-direction:column;display:flex;position:fixed;inset:0}.sim-modal{flex-direction:column;width:100%;height:100%;display:flex}.sim-modal-header{color:#1d1d1f;z-index:10;opacity:0;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#fffffff2;border-bottom:1px solid #d2d2d7;flex-shrink:0;justify-content:space-between;align-items:center;padding:10px 20px;font-size:.9rem;font-weight:600;transition:opacity .25s;display:flex;position:absolute;top:0;left:0;right:0}.sim-overlay:hover .sim-modal-header{opacity:1}.sim-close{color:#1d1d1f;background:#f5f5f7;border:1px solid #d2d2d7;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;transition:background .12s;display:flex}.sim-close:hover{background:#e5e5ea}.sim-frame{background:#fff;border:0;width:100%;height:100%}.phases-card{background:#fff;border:none;border-radius:24px;grid-template-columns:250px 1fr;gap:0;max-width:840px;display:grid;overflow:hidden;box-shadow:0 2px 12px #00000012,0 1px 3px #0000000d}.phases-stepper{background:#fafafa;border-right:1px solid #f5f5f7;flex-direction:column;display:flex}.phase-step{text-align:left;color:#aeaeb2;background:0 0;border-bottom:1px solid #f5f5f7;align-items:center;gap:12px;padding:15px 18px;transition:background .12s;display:flex}.phase-step:last-child{border-bottom:0}.phase-step:hover{color:#6e6e73;background:#f5f5f7}.phase-step.done{color:#aeaeb2}.phase-step.active{color:#0071e3;background:#f0f6ff}.phase-num{color:#6e6e73;background:#e5e5ea;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:.78rem;font-weight:700;transition:background .15s,color .15s;display:flex}.phase-step.active .phase-num{background:var(--phase-accent,#0071e3);color:#fff}.phase-step.done .phase-num{color:#aeaeb2;background:#e5e5ea}.phase-label{font-size:.85rem;font-weight:600;line-height:1.3}.phase-detail{background:#fff;border-left:2px solid #0000;flex-direction:column;gap:10px;padding:28px 32px;transition:border-color .3s;display:flex}.phase-detail-num{letter-spacing:.08em;text-transform:uppercase;border-radius:6px;align-items:center;width:fit-content;padding:3px 10px;font-size:.7rem;font-weight:700;display:inline-flex}.phase-detail h3{color:#1d1d1f;letter-spacing:-.02em;margin:0;font-size:1.15rem;font-weight:700}.phase-detail p{color:#6e6e73;margin:0;font-size:.92rem;line-height:1.65}.phase-nav{gap:8px;margin-top:6px;display:flex}.quiz-card{background:#fff;border:none;border-radius:24px;padding:28px;box-shadow:0 2px 12px #00000012,0 1px 3px #0000000d}.detail-panel .quiz-card{background:0 0;border:none;border-radius:0;padding:0}.quiz-progress{gap:5px;margin-bottom:14px;display:flex}.quiz-dot{background:#e5e5ea;border-radius:2px;flex:1;height:3px;transition:background .3s}.quiz-dot.active{background:#0071e3}.quiz-dot.correct{background:#34c759}.quiz-dot.wrong{background:#ff3b30}.quiz-counter{color:#aeaeb2;letter-spacing:.06em;text-transform:uppercase;margin:0 0 6px;font-size:.75rem;font-weight:600}.quiz-question{color:#1d1d1f;letter-spacing:-.01em;margin:0 0 20px;font-size:1.05rem;font-weight:700;line-height:1.5}.quiz-options{flex-direction:column;gap:8px;display:flex}.quiz-option{text-align:left;color:#1d1d1f;background:#f5f5f7;border:1px solid #e5e5ea;border-radius:10px;align-items:center;gap:12px;padding:12px 16px;font-size:.9rem;transition:background .12s,border-color .12s;display:flex}.quiz-option:hover:not(:disabled){background:#ebebf0;border-color:#d2d2d7}.quiz-option .quiz-option-letter{color:#6e6e73;background:#e5e5ea;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:24px;height:24px;font-size:.75rem;font-weight:700;display:flex}.quiz-option span:last-of-type{flex:1}.quiz-option svg{flex-shrink:0}.quiz-option.correct{color:#065f46;background:#f0fdf4;border-color:#a7f3d0}.quiz-option.correct .quiz-option-letter{color:#065f46;background:#bbf7d0}.quiz-option.wrong{color:#991b1b;background:#fff5f5;border-color:#fecaca}.quiz-option.wrong .quiz-option-letter{color:#991b1b;background:#fecaca}.quiz-feedback{border-radius:9px;align-items:center;gap:7px;margin-top:12px;padding:11px 14px;font-size:.88rem;font-weight:500;display:flex}.quiz-feedback.correct{color:#065f46;background:#f0fdf4;border:1px solid #a7f3d0}.quiz-feedback.wrong{color:#991b1b;background:#fff5f5;border:1px solid #fecaca}.quiz-result{text-align:center;color:#1d1d1f;flex-direction:column;align-items:center;gap:10px;padding:14px 0;display:flex}.quiz-result svg{color:#f59e0b}.quiz-result h3{letter-spacing:-.04em;margin:0;font-size:1.8rem;font-weight:800}.quiz-result p{color:#6e6e73;max-width:340px;margin:0;font-size:.92rem;line-height:1.5}.algo-switcher{background:#f0f0f5;border-radius:12px;gap:2px;margin-bottom:12px;padding:3px;display:flex}.algo-tab{color:#6e6e73;cursor:pointer;background:0 0;border:none;border-radius:9px;flex:1;padding:8px 0;font-size:.85rem;font-weight:600;transition:background .2s,color .2s,box-shadow .2s}.algo-tab.active{color:#1d1d1f;background:#fff;box-shadow:0 1px 6px #0000001f}.algo-tab:not(.active):hover{color:#1d1d1f}.dbscan-card{background:#fff;border-radius:20px;width:100%;overflow:hidden;box-shadow:0 2px 12px #00000012,0 1px 3px #0000000d}.dbscan-body{flex-direction:column;display:flex}.dbscan-settings{border-bottom:1px solid #f0f0f5;flex-direction:column;gap:10px;padding:14px 16px 10px;display:flex}.dbscan-sliders{grid-template-columns:1fr 1fr;gap:8px 20px;display:grid}.dbscan-slider-group{flex-direction:column;gap:3px;display:flex}.dbscan-slider-label{color:#6e6e73;justify-content:space-between;align-items:center;font-size:.75rem;display:flex}.dbscan-slider-label strong{color:#1d1d1f;font-variant-numeric:tabular-nums;font-size:.78rem;font-weight:700}.dbscan-range{appearance:none;cursor:pointer;background:#e2e8f0;border-radius:2px;outline:none;width:100%;height:4px}.dbscan-range::-webkit-slider-thumb{appearance:none;cursor:pointer;background:#3b82f6;border:2px solid #fff;border-radius:50%;width:14px;height:14px;box-shadow:0 1px 4px #3b82f666}.dbscan-range::-moz-range-thumb{cursor:pointer;background:#3b82f6;border:2px solid #fff;border-radius:50%;width:14px;height:14px;box-shadow:0 1px 4px #3b82f666}.dbscan-actions{gap:8px;padding:8px 12px;display:flex}.dbscan-play-btn,.dbscan-regen-btn{cursor:pointer;border:none;border-radius:10px;align-items:center;gap:5px;padding:7px 13px;font-size:.8rem;font-weight:600;transition:background .15s,color .15s;display:flex}.dbscan-play-btn{color:#3b82f6;background:#eff6ff}.dbscan-play-btn.active{color:#fff;background:#3b82f6}.dbscan-play-btn:hover:not(.active){background:#dbeafe}.dbscan-regen-btn{color:#1d1d1f;background:#f5f5f7}.dbscan-regen-btn:hover{background:#e8e8ed}.dbscan-canvas-wrap{aspect-ratio:3/2;background:#fafbfc;border-bottom:1px solid #f0f0f5;width:100%;position:relative}.dbscan-canvas-wrap svg{width:100%;height:100%;display:block}.dbscan-expand-btn{color:#6e6e73;cursor:pointer;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#ffffffe0;border:1px solid #e5e7eb;border-radius:8px;justify-content:center;align-items:center;width:28px;height:28px;transition:background .15s,color .15s;display:flex;position:absolute;top:9px;right:9px}.dbscan-expand-btn:hover{color:#1d1d1f;background:#fff}.dbscan-dots{flex-wrap:wrap;justify-content:center;gap:5px;padding:9px 16px 0;display:flex}.dbscan-dot{cursor:pointer;background:#e2e8f0;border:none;border-radius:50%;width:7px;height:7px;padding:0;transition:background .15s,transform .15s}.dbscan-dot.done{background:#93c5fd}.dbscan-dot.active{background:#3b82f6;transform:scale(1.3)}.dbscan-info{padding:9px 15px 6px}.dbscan-info-hd{flex-wrap:wrap;align-items:center;gap:5px;margin-bottom:5px;display:flex}.dbscan-info-hd svg{color:#3b82f6;flex-shrink:0}.dbscan-step-label{color:#9ca3af;white-space:nowrap;font-size:.72rem}.dbscan-info-hd strong{color:#1d1d1f;font-size:.82rem;font-weight:700}.dbscan-hint{color:#374151;background:#f0f7ff;border-left:3px solid #3b82f6;border-radius:0 8px 8px 0;margin:0;padding:7px 10px;font-size:.8rem;line-height:1.55}.dbscan-nav{justify-content:space-between;align-items:center;gap:8px;padding:9px 13px 13px;display:flex}.dbscan-nav-btn{color:#1d1d1f;background:#f5f5f7;border:none;border-radius:10px;align-items:center;gap:4px;padding:7px 13px;font-size:.8rem;font-weight:600;transition:background .15s;display:flex}.dbscan-nav-btn:disabled{opacity:.32;cursor:default}.dbscan-nav-btn:not(:disabled):hover{background:#e8e8ed}.dbscan-nav-btn.primary{color:#fff;background:#3b82f6}.dbscan-nav-btn.primary:not(:disabled):hover{background:#2563eb}.dbscan-step-counter{color:#9ca3af;font-size:.78rem}.dbscan-overlay{z-index:200;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#00000080;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.dbscan-modal{background:#fff;border-radius:24px;flex-direction:column;width:min(820px,96vw);max-height:94vh;display:flex;overflow:hidden;box-shadow:0 24px 64px #00000038}.dbscan-modal-header{color:#1d1d1f;border-bottom:1px solid #f0f0f5;flex-shrink:0;justify-content:space-between;align-items:center;padding:13px 20px;font-size:.9rem;font-weight:700;display:flex}.dbscan-modal-header button{color:#6e6e73;cursor:pointer;background:#f5f5f7;border:none;border-radius:8px;align-items:center;gap:6px;padding:6px 12px;font-size:.8rem;font-weight:600;transition:background .15s;display:flex}.dbscan-modal-header button:hover{color:#1d1d1f;background:#e8e8ed}.dbscan-modal-scroll{flex:1;overflow-y:auto}.dbscan-modal-scroll .dbscan-canvas-wrap{aspect-ratio:16/9}.dbscan-modal-scroll .dbscan-hint{font-size:.86rem}.car-card{margin-top:14px}.car-card-header{border-bottom:1px solid #f0f0f5;align-items:baseline;gap:10px;padding:14px 16px 10px;display:flex}.car-card-title{color:#1d1d1f;font-size:.88rem;font-weight:700}.car-card-sub{color:#9ca3af;font-size:.75rem}.car-axis-row{flex-wrap:wrap;align-items:flex-end;gap:12px;display:flex}.car-axis-group{flex-direction:column;flex:1;gap:4px;min-width:130px;display:flex}.car-axis-label{color:#6e6e73;font-size:.75rem;font-weight:500}.car-axis-select{appearance:none;color:#1d1d1f;cursor:pointer;background:#f5f5f7 url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%236e6e73'/%3E%3C/svg%3E") right 10px center no-repeat;border:1px solid #e2e8f0;border-radius:9px;outline:none;padding:6px 28px 6px 10px;font-family:inherit;font-size:.8rem;font-weight:600;transition:border-color .15s,background-color .15s}.car-axis-select:hover{background-color:#ededf2;border-color:#c7d2e0}.car-axis-select:focus{background-color:#fff;border-color:#3b82f6}.dbscan-extras{flex-direction:column;gap:16px;margin-top:16px;margin-bottom:40px;display:flex}.dbscan-extra-card{background:#fff;border-radius:18px;padding:20px 22px;box-shadow:0 2px 12px #00000012,0 1px 3px #0000000a}.dbscan-extra-title{color:#1d1d1f;align-items:center;gap:8px;margin-bottom:14px;font-size:.88rem;font-weight:700;display:flex}.dbscan-extra-title.green{color:#15803d}.dbscan-extra-title.red{color:#991b1b}.dbscan-extra-title svg{flex-shrink:0}.dbscan-terms{flex-direction:column;gap:0;display:flex}.dbscan-term{border-bottom:1px solid #f5f5f7;grid-template-columns:140px 1fr;align-items:baseline;gap:6px 16px;padding:8px 0;display:grid}.dbscan-term:last-child{border-bottom:none}.dbscan-term dt{color:#1d1d1f;font-family:SF Mono,Fira Code,Consolas,monospace;font-size:.82rem;font-style:normal;font-weight:700}.dbscan-term dd{color:#6e6e73;margin:0;font-size:.82rem;line-height:1.5}.dbscan-sw-row{grid-template-columns:1fr 1fr;gap:16px;display:grid}.dbscan-sw-list{flex-direction:column;gap:7px;margin:0;padding:0;list-style:none;display:flex}.dbscan-sw-list li{color:#374151;align-items:flex-start;gap:7px;font-size:.82rem;line-height:1.4;display:flex}.strength .dbscan-sw-list li svg{color:#22c55e;flex-shrink:0;margin-top:1px}.weakness .dbscan-sw-list li svg{color:#ef4444;flex-shrink:0;margin-top:1px}.dbscan-complexity-grid{flex-direction:column;gap:0;display:flex}.dbscan-complexity-row{border-bottom:1px solid #f5f5f7;grid-template-columns:200px 90px 1fr;align-items:center;gap:8px 16px;padding:9px 0;display:grid}.dbscan-complexity-row:last-child{border-bottom:none}.dbscan-c-label{color:#6e6e73;font-size:.82rem}.dbscan-c-value{color:#1d1d1f;white-space:nowrap;background:#f0f7ff;border:1px solid #dbeafe;border-radius:6px;padding:2px 8px;font-family:SF Mono,Fira Code,Consolas,monospace;font-size:.85rem;font-weight:700}.dbscan-c-note{color:#9ca3af;font-size:.78rem}@media (width<=1100px){.hero-content{width:min(820px,92vw)}.content{padding-left:32px;padding-right:32px}.study-cards-grid{grid-template-columns:1fr 1fr}}.viz-preview-grid{grid-template-columns:1fr 1fr;gap:10px;margin-top:12px;display:grid}.viz-preview-btn{cursor:pointer;text-align:center;background:#f5f5f7;border:1.5px solid #0000;border-radius:14px;flex-direction:column;align-items:center;gap:6px;padding:10px 10px 12px;transition:background .15s,border-color .15s,transform .12s;display:flex}.viz-preview-btn:hover{background:#ededf2;border-color:#c7d2e0;transform:translateY(-2px)}.viz-preview-btn--wide{width:100%;margin-top:12px}.viz-preview-thumb{aspect-ratio:3/2;background:#fff;border-radius:9px;justify-content:center;align-items:center;width:100%;display:flex;overflow:hidden;box-shadow:0 1px 4px #0000000f}.viz-preview-thumb svg{width:100%;height:100%}.viz-preview-label{color:#1d1d1f;font-size:.82rem;font-weight:700}.viz-preview-sub{color:#6e6e73;font-size:.72rem;line-height:1.3}.viz-lightbox-overlay{z-index:200;-webkit-backdrop-filter:blur(10px);background:#0000008c;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.viz-lightbox{background:#fff;border-radius:22px;flex-direction:column;width:min(96vw,1400px);height:92vh;display:flex;overflow:hidden;box-shadow:0 32px 96px #00000047}.viz-lightbox-header{color:#1d1d1f;border-bottom:1px solid #f0f0f5;flex-shrink:0;justify-content:space-between;align-items:center;padding:14px 20px;font-size:.92rem;font-weight:700;display:flex}.viz-lightbox-header button{color:#1d1d1f;background:#f5f5f7;border-radius:12px;align-items:center;gap:6px;padding:6px 14px;font-size:.8rem;font-weight:600;transition:background .15s;display:flex}.viz-lightbox-header button:hover{background:#e8e8ed}.viz-lightbox-body{flex:1;grid-template-columns:260px 1fr 240px;min-height:0;display:grid;overflow:hidden}.viz-lightbox-viz{border-left:1px solid #f0f0f5;border-right:1px solid #f0f0f5;flex-direction:column;min-height:0;display:flex;overflow:hidden}.viz-lightbox-viz .dbscan-body{flex-direction:column;flex:1;min-height:0;display:flex;overflow:hidden}.viz-lightbox-viz .dbscan-canvas-wrap{min-height:0;aspect-ratio:unset!important;flex:1!important}.viz-lightbox-viz .dbscan-expand-btn{display:none}.viz-lightbox-flow{background:#fafafa;padding:20px 16px;overflow-y:auto}.viz-lightbox-controls{background:#fafafa;flex-direction:column;gap:12px;padding:16px;display:flex;overflow-y:auto}.viz-lightbox-controls .car-axis-row{flex-direction:column;gap:10px}.viz-lightbox-controls .dbscan-sliders{grid-template-columns:1fr;gap:10px}.viz-lightbox-controls .dbscan-slider-group,.viz-lightbox-controls .car-axis-group,.viz-lightbox-controls .car-axis-select{width:100%}.algo-flow-panel{flex-direction:column;gap:12px;display:flex}.algo-flow-heading{color:#6e6e73;text-transform:uppercase;letter-spacing:.06em;font-size:.78rem;font-weight:700}.algo-flow-desc{color:#6e6e73;margin:0;font-size:.78rem;line-height:1.55}.algo-flow-steps{flex-direction:column;gap:6px;margin-top:4px;display:flex}.algo-flow-phase{background:#fff;border:1.5px solid #f0f0f5;border-radius:12px;align-items:flex-start;gap:10px;padding:9px 10px;transition:border-color .3s,box-shadow .3s,background .3s;display:flex}.algo-flow-phase.done{background:#f0fdf4;border-color:#86efac}.algo-flow-phase.active{background:#eff6ff;border-color:#3b82f6;box-shadow:0 2px 10px #3b82f626}.algo-flow-num{color:#64748b;background:#e2e8f0;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:22px;height:22px;font-size:.7rem;font-weight:700;transition:background .3s,color .3s;display:flex}.algo-flow-phase.done .algo-flow-num{color:#fff;background:#22c55e}.algo-flow-phase.active .algo-flow-num{color:#fff;background:#3b82f6}.algo-flow-label{color:#1d1d1f;font-size:.8rem;font-weight:700;line-height:1.3}.algo-flow-sub{color:#6e6e73;margin-top:2px;font-size:.72rem;line-height:1.4}.example-bar{flex-wrap:wrap;align-items:center;gap:10px;margin:4px 0 2px;display:flex}.example-bar-label{color:#6e6e73;white-space:nowrap;font-size:.8rem;font-weight:600}.example-btn{color:#1d1d1f;cursor:pointer;background:#f5f5f7;border:1.5px solid #e2e8f0;border-radius:20px;padding:6px 16px;font-size:.82rem;font-weight:600;transition:background .15s,border-color .15s,color .15s}.example-btn:hover{background:#e8e8ed;border-color:#c7d2e0}.example-btn.active{color:#fff;background:#0071e3;border-color:#0071e3}.car3d-canvas{cursor:grab;touch-action:none;-webkit-user-select:none;user-select:none;display:block}.car3d-canvas:active{cursor:grabbing}@media (width<=760px){.navbar{gap:12px;padding:0 18px}.navbar nav{display:none}.brand span{font-size:17px}.hero{min-height:auto;padding:76px 24px 40px}.hero h1{font-size:30px}.hero p{font-size:15px}.hero-buttons{flex-direction:column;align-items:stretch}.play-btn,.info-btn{justify-content:center}.content{margin-top:24px;padding:0 18px 56px}.study-cards-grid,.detail-grid,.detail-grid--3{grid-template-columns:1fr}.card-scroller,.resource-scroller{grid-auto-columns:76vw}}
