.progress-summary{min-width:260px}.progress-summary>span{color:var(--muted);font-size:12px}.progress-summary strong{float:right}.progress-track{clear:both;height:7px;margin-top:10px;border-radius:10px;background:var(--surface2);overflow:hidden}.progress-track i{display:block;width:0;height:100%;background:var(--green);transition:width .3s}.roadmap-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.roadmap-card{padding:32px 26px 38px;border-right:1px solid var(--line);position:relative}.roadmap-card:last-child{border-right:0}.roadmap-card:before{content:"";position:absolute;width:9px;height:9px;top:-5px;left:26px;border-radius:50%;background:var(--stage-color);box-shadow:0 0 0 5px var(--bg)}.roadmap-card>span{color:var(--stage-color);font-size:11px;font-weight:700}.roadmap-card h3{margin:12px 0 6px;font-size:20px}.roadmap-card>p{min-height:52px;color:var(--muted);font-size:13px}.roadmap-card ul{list-style:none;padding:0;margin:24px 0 0}.roadmap-card li{padding:10px 0;display:flex;align-items:center;gap:9px;border-top:1px solid var(--line);font-size:13px;cursor:pointer}.roadmap-card li i{width:17px;height:17px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;font-style:normal;font-size:9px}.roadmap-card li.done i{background:var(--stage-color);color:#fff;border-color:transparent}
.analogy-section{margin:100px calc((1260px - 100vw)/2) 0;padding:80px max(24px,calc((100vw - 1260px)/2));display:grid;grid-template-columns:.75fr 1.25fr;gap:70px;color:#fff;background:var(--green2)}.analogy-copy h2{margin-top:14px}.analogy-copy p{color:rgba(255,255,255,.65)}.analogy-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.analogy-grid article{padding:18px;display:grid;grid-template-columns:38px 1fr;border:1px solid rgba(255,255,255,.14);border-radius:16px;background:rgba(255,255,255,.055)}.analogy-grid article>span{grid-row:span 2;font-size:22px}.analogy-grid b{font-size:14px}.analogy-grid p{margin:2px 0 0;color:rgba(255,255,255,.62);font-size:12px}
.quiz-section{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px;align-items:start;padding-bottom:130px}.quiz-intro{position:sticky;top:120px}.quiz-intro p{color:var(--muted);max-width:410px}.quiz-score{width:180px;margin-top:32px;padding:18px 22px;display:flex;align-items:baseline;gap:10px;border-left:3px solid var(--lime);background:var(--surface)}.quiz-score strong{font-size:30px}.quiz-score span{color:var(--muted);font-size:12px}.quiz-card{padding:38px;border:1px solid var(--line);border-radius:28px;background:var(--surface);box-shadow:var(--shadow)}.quiz-meta{display:flex;align-items:center;gap:14px;color:var(--green);font-size:11px;font-weight:700}.quiz-meta i{flex:1;height:1px;background:var(--line)}.quiz-card h3{min-height:68px;margin:30px 0 25px;font-size:23px;line-height:1.55}.quiz-options{display:grid;gap:10px}.quiz-option{width:100%;padding:15px 17px;display:flex;gap:12px;text-align:left;border:1px solid var(--line);border-radius:13px;background:transparent;cursor:pointer;transition:.2s}.quiz-option:hover{border-color:var(--green)}.quiz-option.correct{border-color:#2c9b63;background:rgba(44,155,99,.1)}.quiz-option.wrong{border-color:#d76b5d;background:rgba(215,107,93,.1)}.quiz-option span{width:24px;height:24px;flex:0 0 24px;display:grid;place-items:center;border:1px solid var(--line);border-radius:7px;font-size:11px}.quiz-feedback{margin-top:18px;padding:14px 16px;color:var(--muted);background:var(--surface2);border-radius:12px;font-size:13px}.quiz-feedback strong{color:var(--ink)}.quiz-next{margin-top:22px;float:right}.quiz-next:disabled{opacity:.35;cursor:not-allowed;transform:none}
footer{min-height:150px;padding:40px max(24px,calc((100vw - 1260px)/2));display:grid;grid-template-columns:180px 1fr auto;align-items:center;gap:40px;border-top:1px solid var(--line);background:var(--surface);color:var(--muted);font-size:12px}.footer-brand{display:flex;align-items:center;gap:10px;color:var(--ink)}footer a{color:var(--green);font-weight:700}.drawer-backdrop{position:fixed;inset:0;z-index:40;background:rgba(12,20,16,.45);backdrop-filter:blur(3px)}.detail-drawer{position:fixed;top:0;right:0;bottom:0;width:min(520px,100%);padding:48px;z-index:41;background:var(--surface);box-shadow:-30px 0 80px rgba(0,0,0,.2);transform:translateX(105%);transition:transform .3s cubic-bezier(.2,.8,.2,1);overflow-y:auto}.detail-drawer.open{transform:translateX(0)}.drawer-close{position:absolute;top:20px;right:22px;width:38px;height:38px;border:1px solid var(--line);border-radius:50%;background:transparent;cursor:pointer;font-size:22px}.drawer-kicker{color:var(--node-color);font-size:11px;font-weight:800;letter-spacing:.15em}.drawer-title{margin:12px 0 8px;font-size:38px;line-height:1.2}.drawer-subtitle{color:var(--muted);font-size:15px}.plain-card{margin:28px 0;padding:22px;border-left:3px solid var(--node-color);border-radius:0 16px 16px 0;background:var(--surface2)}.plain-card span{color:var(--node-color);font-size:11px;font-weight:800}.plain-card p{margin-bottom:0}.drawer-block{margin-top:28px}.drawer-block h4{margin:0 0 12px;font-size:14px}.drawer-block ul{padding-left:18px;color:var(--muted);font-size:13px}.drawer-block li{margin:8px 0}.drawer-task{padding:18px;border:1px dashed var(--node-color);border-radius:14px}.drawer-actions{display:flex;gap:10px;margin-top:30px}.learn-button{flex:1;justify-content:center}.learn-button.done{background:var(--ink)}.github-button{padding:14px 17px;border:1px solid var(--line);border-radius:14px;font-weight:700;font-size:13px}.toast{position:fixed;left:50%;bottom:28px;z-index:60;padding:12px 18px;color:#fff;background:#17211c;border-radius:12px;box-shadow:var(--shadow);opacity:0;transform:translate(-50%,20px);pointer-events:none;transition:.25s}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:980px){.topnav{display:none}.hero{grid-template-columns:1fr;padding-top:70px}.hero-visual{min-height:500px}#nodesContainer{grid-template-columns:repeat(3,1fr)}.roadmap-grid{grid-template-columns:repeat(2,1fr)}.roadmap-card:nth-child(2){border-right:0}.analogy-section{grid-template-columns:1fr;margin-left:-24px;margin-right:-24px}.quiz-section{grid-template-columns:1fr}.quiz-intro{position:static}}
@media(max-width:680px){.topbar{width:calc(100% - 20px);height:64px;top:8px;padding:0 12px}.brand small,.source-link{display:none}main{width:calc(100% - 30px)}.hero{min-height:auto;padding:70px 0 30px;gap:20px}.hero h1{font-size:46px}.hero-description{font-size:15px}.hero-actions{align-items:flex-start;flex-direction:column}.hero-stats{gap:24px}.hero-visual{min-height:410px;transform:scale(.86);margin:-20px -30px}.orbit-one{width:400px;height:400px}.orbit-two{width:300px;height:300px}.core-card{width:230px;height:230px}.plain-language-strip{grid-template-columns:1fr;gap:8px}.knowledge-section,.roadmap-section,.quiz-section{padding-top:90px}.section-heading{align-items:stretch;flex-direction:column}.tree-tools{flex-direction:column}.search-box{width:100%}.tree-legend{flex-wrap:wrap;gap:10px 18px}.tree-legend small{width:100%;margin:4px 0 0}.tree-canvas{min-height:auto;padding:100px 15px 24px}#nodesContainer,.tree-canvas.list-view #nodesContainer{grid-template-columns:1fr}.tree-lines{display:none}.knowledge-node{min-height:140px}.roadmap-grid{grid-template-columns:1fr}.roadmap-card{border-right:0;border-bottom:1px solid var(--line)}.analogy-grid{grid-template-columns:1fr}.quiz-card{padding:24px}.detail-drawer{padding:55px 24px 30px}footer{grid-template-columns:1fr;gap:14px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition-duration:.01ms!important}}