*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,sans-serif;line-height:1.7}a{color:inherit;text-underline-offset:4px}button,input,select,textarea{font:inherit}button,.button{display:inline-flex;justify-content:flex-start;align-items:center;gap:.5rem;background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:.6rem .85rem;text-decoration:none;cursor:pointer;min-height:44px}button:hover,.button:hover{border-color:var(--primary)}button[aria-pressed=true]{border-color:var(--primary);background:var(--surface-2)}:focus-visible{outline:3px solid var(--accent-2);outline-offset:4px}.primary{background:var(--primary);color:#191b20;border-color:var(--primary);font-weight:650}.skip{position:absolute;top:-100px;left:12px;z-index:100}.skip:focus{top:10px;background:var(--bg);padding:12px}.topbar{position:sticky;top:0;z-index:20;background:var(--bg);border-bottom:1px solid var(--border)}.nav-inner{max-width:1240px;margin:auto;padding:.7rem 1.5rem;display:flex;align-items:center;gap:1rem;flex-wrap:wrap}.brand{display:flex;align-items:center;gap:.65rem;text-decoration:none;font-weight:750}.brand svg{width:30px;height:30px;color:var(--primary)}.text-sky-400{color:#6cc9f4}.pro{color:#cbd5e1}.tracks{display:flex;gap:.4rem;flex-wrap:wrap;flex:1}.tracks a{padding:.4rem .6rem;border-radius:7px;font-size:.88rem;text-decoration:none}.tracks a[aria-current=page]{color:var(--primary);background:var(--surface-2)}.tools{display:flex;gap:.4rem;flex-wrap:wrap}.tools button{font-size:.85rem;padding:.4rem .6rem}.wrap{max-width:1180px;margin:auto;padding:0 1.5rem}main{min-height:70vh}.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:3rem;align-items:center;padding:4.5rem 0}.hero h1{font-size:clamp(2.2rem,4.5vw,4rem);letter-spacing:-.035em;line-height:1.06;margin:.5rem 0 1.3rem;max-width:16ch}.hero .subtitle{font-size:1.4rem;color:var(--primary);line-height:1.4}.hero p{max-width:58ch}.hero img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:14px}.meta{color:var(--text-muted);font-size:.9rem}.actions{display:flex;gap:.7rem;flex-wrap:wrap;margin:1.3rem 0}.intro{padding:3rem 0 2rem}.intro h1{font-size:clamp(2rem,4vw,3.2rem);line-height:1.15;letter-spacing:-.03em;max-width:25ch}.intro p{max-width:72ch}.breadcrumb{margin-top:1.4rem;font-size:.9rem;color:var(--text-muted)}h2{font-size:1.65rem;line-height:1.3;margin:2.7rem 0 1.2rem}h3{line-height:1.4;margin:1.7rem 0 .65rem}p{margin:.7rem 0 1.25rem}.module-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin:1.5rem 0 3rem}.module-card{border:1px solid var(--border);border-radius:12px;padding:1.4rem;background:var(--surface);text-decoration:none;display:block}.module-card h3{font-size:1.22rem;margin:.6rem 0}.module-card:hover{border-color:var(--primary)}.card-top{display:flex;justify-content:space-between;color:var(--text-muted);font-size:.9rem}.module-detail{border-top:1px solid var(--border);padding:1rem 0 2rem}.module-detail h2{font-size:1.5rem}.topic-button{width:100%;text-align:left;border:none;border-radius:0;border-top:1px solid var(--border);background:transparent}.topic-explanation{padding:1rem 1.4rem;background:var(--surface)}.number{display:inline-grid;place-items:center;flex:0 0 2rem;width:2rem;height:2rem;border:1px solid var(--border);border-radius:50%;font-size:.9rem;margin-right:.55rem}.reading-layout{display:grid;grid-template-columns:210px minmax(0,1fr);gap:3rem}.toc{align-self:start;position:sticky;top:125px;padding:1rem 0;max-height:75vh;overflow:auto;font-size:.9rem}.toc ol{padding-left:1.3rem}.toc a{display:block;text-decoration:none;color:var(--text-muted);margin:.8rem 0}.toc a.is-active{color:var(--primary)}.lesson{max-width:850px;min-width:0}.topic{padding:0 0 2.8rem;margin-bottom:2rem;border-bottom:1px solid var(--border)}.topic>h2{display:flex;align-items:baseline}.inema-prose{max-width:var(--measure,68ch)}.diagram{margin:1.5rem 0 2rem;padding:1rem;background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden}.diagram svg{width:100%;height:auto;display:block;font-family:Inter,system-ui,sans-serif}.diagram figcaption{font-size:.9rem;color:var(--text-muted);margin:.75rem .2rem 0;max-width:75ch}.tip{background:var(--surface);padding:1.2rem 1.4rem;border-radius:10px;margin:1.3rem 0}.tip strong{color:var(--primary)}.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.compare-grid>div{padding:1rem;border:1px solid var(--border);border-radius:10px}.compare-grid h3{margin:.2rem 0 .7rem;font-size:1rem}.keyline{color:var(--text-muted);font-size:.92rem}.codebox{padding:1.5rem;border:1px solid var(--border);border-radius:12px;background:var(--surface);margin:2rem 0}.codebox pre{white-space:pre-wrap;overflow-wrap:anywhere;max-width:100%;font-size:.95rem;font-family:ui-monospace,monospace;line-height:1.7}.timeline{padding-left:1.5rem}.timeline li{padding:.5rem 0 .5rem .4rem}.lab{padding:1.3rem;border:1px solid var(--border);border-radius:14px;margin:2rem 0;background:var(--surface)}.lab-controls{display:flex;gap:1rem;flex-wrap:wrap}.lab-controls label{display:grid;gap:.3rem;flex:1;min-width:140px}select,input,textarea{color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:.6rem;width:100%}.lab svg{width:100%;height:auto;display:block;margin:1rem 0}.lab output{display:block;white-space:pre-wrap;margin:1rem 0}.quiz{padding:1.5rem;background:var(--surface);border-radius:12px;margin:2rem 0}.quiz button{display:block;width:100%;text-align:left;margin:.7rem 0}.quiz details{margin-top:1rem}.quiz-feedback{padding:.8rem 0}.appearance-wrap{position:relative}.inema-appearance-pop{position:fixed!important;right:1rem;top:5rem;max-width:calc(100vw - 2rem);max-height:75vh;overflow:auto;z-index:40;background:var(--surface)}.inema-segment{display:flex;flex-wrap:wrap;gap:.4rem;margin:.6rem}.footer{border-top:1px solid var(--border);margin-top:4rem;padding:2rem 0;color:var(--text-muted);font-size:.9rem}.footer .wrap{display:flex;gap:1.5rem;flex-wrap:wrap}dialog{background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:14px;width:min(1100px,95vw);height:90vh;padding:1rem}dialog::backdrop{background:#000a}dialog iframe{border:0;width:100%;height:calc(100% - 60px)}.resource-links li{margin:1rem 0}table{width:100%;border-collapse:collapse;margin:1.5rem 0}th,td{border-bottom:1px solid var(--border);text-align:left;padding:.75rem;vertical-align:top}.table-scroll{overflow:auto}.wide-only{display:inline}.fine{font-size:.85rem;color:var(--text-muted)}.dark .border-dark-600{border-color:#374151}.dark .divide-dark-600>:not([hidden])~:not([hidden]){border-color:#374151}html:not(.dark) .text-sky-400{color:#036080}html:not(.dark) .pro{color:#92400e}html:not(.dark) .primary{color:#fff}html:not(.dark) svg[role=img]{filter:saturate(.82) brightness(.96)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}[hidden]{display:none!important}
@media(max-width:850px){.hero{gap:2rem}.reading-layout{grid-template-columns:1fr;gap:0}.toc{position:static;max-height:none;border-bottom:1px solid var(--border)}.toc ol{display:flex;gap:1rem;flex-wrap:wrap;list-style:none;padding:0}.toc li{max-width:46%}.nav-inner{gap:.5rem;padding:.6rem 1rem}.tracks{order:3;flex-basis:100%}.wide-only{display:none}}
@media(max-width:600px){.wrap{padding:0 1rem}.hero{grid-template-columns:1fr;padding:2.5rem 0}.hero h1{font-size:2.7rem}.hero img{max-height:300px}.module-grid,.compare-grid,.form-grid{grid-template-columns:1fr}.tracks{gap:0}.tracks a{padding:.3rem .4rem;font-size:.8rem}.brand{font-size:.85rem}.tools{margin-left:auto}.tools button{font-size:.78rem}.topic h2{font-size:1.4rem}.diagram{padding:.5rem}.diagram svg{min-width:0}.lab{padding:.8rem}.toc{font-size:.85rem}.intro{padding-top:1.5rem}.codebox{padding:1rem}.appearance-wrap{position:static}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}

figure{margin-inline:0}.hero figure{margin:0}html{--inema-nav-h:7rem}@media(max-width:600px){html{--inema-nav-h:12rem}.topbar{position:relative}.diagram{overflow-x:auto}.diagram svg{min-width:480px}.diagram::after{content:""}}

.aesthetic-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem}.aesthetic-grid figure{margin:0}.aesthetic-grid svg{width:100%;height:auto;border-radius:10px}.aesthetic-grid figcaption{padding:.5rem 0}.aesthetic-grid p{font-size:.9rem;color:var(--text-muted)}@media(max-width:600px){.aesthetic-grid{grid-template-columns:1fr}}
html:not(.dark){--primary:#92400e;--text-muted:#595b62}html[data-theme=sepia]{--primary:#7b430e;--text-muted:#6b563e}.diagram-hint{display:none}@media(max-width:600px){.diagram-hint{display:block;font-size:.85rem;color:var(--text-muted);margin:0 0 .5rem}.diagram svg{min-width:560px}}