:root{--bg: #fbfaf8;--surface: #ffffff;--ink: #1a1a2e;--ink-soft: #4a4a63;--ink-faint: #7a7a90;--line: #e7e3dc;--line-soft: #f0ece5;--accent: #7048e8;--accent-soft: #f3f0ff;--radius: 14px;--shadow: 0 1px 2px rgba(26, 26, 46, .04), 0 8px 24px rgba(26, 26, 46, .05);--maxw: 1120px;--font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3,h4{line-height:1.2;font-weight:700;letter-spacing:-.015em}h1{font-size:clamp(1.8rem,4vw,2.6rem)}h2{font-size:1.5rem;margin-top:2.4rem}h3{font-size:1.15rem;margin-top:1.8rem}code{font-family:var(--mono);font-size:.9em;background:var(--line-soft);padding:.1em .4em;border-radius:6px}pre code{background:none;padding:0}pre{background:#1a1a2e;color:#f0ece5;padding:1rem 1.2rem;border-radius:var(--radius);overflow-x:auto;font-size:.9rem}.wrap{max-width:var(--maxw);margin:0 auto;padding:0 1.4rem}.narrow{max-width:760px}.site-header{position:sticky;top:0;z-index:20;background:#fbfaf8d9;backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}.site-header .wrap{display:flex;align-items:center;gap:1.4rem;height:60px}.brand{font-weight:800;letter-spacing:-.03em;font-size:1.1rem;color:var(--ink)}.brand:hover{text-decoration:none}.brand span{color:var(--accent)}.site-nav{display:flex;gap:1.1rem;margin-left:auto;font-size:.92rem;font-weight:500}.site-nav a{color:var(--ink-soft)}.site-nav a:hover{color:var(--accent);text-decoration:none}.site-footer{border-top:1px solid var(--line);margin-top:4rem;padding:2rem 0;color:var(--ink-faint);font-size:.87rem}.site-footer .wrap{display:flex;flex-wrap:wrap;gap:.6rem 1.4rem;align-items:center}.badge{display:inline-flex;align-items:center;gap:.35em;font-size:.74rem;font-weight:600;padding:.2em .6em;border-radius:999px;background:var(--line-soft);color:var(--ink-soft);white-space:nowrap}.badge.stage{background:var(--accent-soft);color:var(--accent)}.id-chip{font-family:var(--mono);font-weight:600;font-size:.8rem;color:var(--ink-faint)}.grid{display:grid;gap:1rem}.grid.cols-2{grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}.grid.cols-3{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}.card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.1rem 1.2rem;box-shadow:var(--shadow);transition:transform .12s ease,box-shadow .12s ease,border-color .12s ease;color:inherit}a.card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 2px 4px #1a1a2e0f,0 14px 34px #1a1a2e14;border-color:var(--strand-color, var(--accent))}.card .card-head{display:flex;align-items:center;gap:.5rem;margin-bottom:.4rem}.card h3{margin:0;font-size:1.02rem}.card p{margin:.3rem 0 0;color:var(--ink-soft);font-size:.92rem}.strand-dot{width:11px;height:11px;border-radius:50%;background:var(--strand-color, var(--accent));flex:none}.hero{padding:3rem 0 1.5rem}.hero p.lede{font-size:1.15rem;color:var(--ink-soft);max-width:640px}.stat-row{display:flex;flex-wrap:wrap;gap:1.6rem;margin-top:1.6rem}.stat b{display:block;font-size:1.7rem;font-weight:800;letter-spacing:-.02em}.stat span{color:var(--ink-faint);font-size:.85rem}.concept-layout{display:grid;grid-template-columns:1fr 300px;gap:2.4rem;align-items:start}.concept-body{min-width:0}.concept-body h2{border-bottom:1px solid var(--line);padding-bottom:.3rem}.concept-body ul,.concept-body ol{padding-left:1.3rem}.concept-body li{margin:.3rem 0}.concept-body blockquote{margin:1.2rem 0;padding:.6rem 1.1rem;border-left:3px solid var(--accent);background:var(--accent-soft);border-radius:0 8px 8px 0;color:var(--ink-soft)}.statement-lead{font-size:1.2rem;color:var(--ink);border-left:4px solid var(--strand-color, var(--accent));padding-left:1rem;margin:0 0 1.4rem}.aside{position:sticky;top:76px;display:flex;flex-direction:column;gap:1.2rem}.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1rem 1.1rem}.panel h4{margin:0 0 .6rem;font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-faint)}.panel ul{list-style:none;margin:0;padding:0}.panel li{margin:.35rem 0;font-size:.92rem}.link-list a{display:block}.link-list .rtype{font-size:.68rem;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-faint);font-weight:600}.link-list .rnote{color:var(--ink-faint);font-size:.82rem}.coverage-table{width:100%;border-collapse:collapse;font-size:.86rem}.coverage-table td{padding:.3rem 0;vertical-align:top;border-bottom:1px solid var(--line-soft)}.coverage-table td:first-child{white-space:nowrap;padding-right:.8rem;font-weight:600}.coverage-table .excl td:first-child{color:#c92a2a}.pager{display:flex;justify-content:space-between;gap:1rem;margin-top:2.4rem}.pager a{font-size:.9rem}.breadcrumb{font-size:.85rem;color:var(--ink-faint);margin:1.4rem 0 .4rem}.breadcrumb a{color:var(--ink-faint)}.strand-hero{border-radius:var(--radius);padding:1.8rem;color:#fff;margin:1.4rem 0 2rem}.strand-hero h1{margin:.2rem 0}.strand-hero p{margin:0;opacity:.92;max-width:620px}.strand-hero .id-chip{color:#fffc}.seq{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:.7rem}.seq-item{display:grid;grid-template-columns:auto 1fr auto;gap:.9rem;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:.85rem 1.1rem;box-shadow:var(--shadow);color:inherit}a.seq-item:hover{text-decoration:none;border-color:var(--strand-color, var(--accent));transform:translate(2px);transition:.12s}.seq-item .seq-id{font-family:var(--mono);font-weight:700;font-size:.82rem;color:var(--strand-color, var(--accent))}.seq-item .seq-title{font-weight:600}.seq-item .seq-statement{color:var(--ink-soft);font-size:.88rem;margin-top:.15rem}.stage-block{margin:2.2rem 0}.stage-block h2{display:flex;align-items:baseline;gap:.7rem;margin-top:0}.stage-block h2 .age{font-size:.9rem;font-weight:500;color:var(--ink-faint)}.chip-row{display:flex;flex-wrap:wrap;gap:.5rem}.concept-chip{display:inline-flex;align-items:center;gap:.4rem;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:.3rem .7rem;font-size:.84rem;color:inherit}a.concept-chip:hover{text-decoration:none;border-color:var(--strand-color, var(--accent))}.prose{max-width:760px}.prose p{color:var(--ink-soft)}.callout{background:var(--accent-soft);border:1px solid #e3dcff;border-radius:var(--radius);padding:1rem 1.2rem;margin:1.4rem 0;font-size:.92rem;color:var(--ink-soft)}.exercises{margin:2.2rem 0 0}.exercises h2{border-bottom:1px solid var(--line);padding-bottom:.3rem}.ex-lead{color:var(--ink-soft);font-size:.92rem;margin:.4rem 0 1.1rem}.ex-list{list-style:none;margin:0;padding:0;counter-reset:ex;display:flex;flex-direction:column;gap:.8rem}.ex{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:.9rem 1.1rem .9rem 2.6rem}.ex:before{counter-increment:ex;content:counter(ex);position:absolute;left:.85rem;top:.9rem;font-family:var(--mono);font-weight:700;font-size:.82rem;color:var(--strand-color, var(--accent))}.ex-prompt{margin:0;color:var(--ink)}.ex-answer{margin:.5rem 0 0}.ex-answer summary{cursor:pointer;font-size:.82rem;font-weight:600;letter-spacing:.03em;text-transform:uppercase;color:var(--ink-faint);width:fit-content}.ex-answer[open] summary{margin-bottom:.35rem}.ex-answer p{margin:0;color:var(--ink-soft);font-size:.94rem}.ex-art{margin:.6rem 0 0;padding-top:.55rem;border-top:1px dashed var(--line);font-size:.88rem;color:var(--ink-soft)}.ex-art span{font-size:.66rem;text-transform:uppercase;letter-spacing:.06em;font-weight:700;color:var(--strand-color, var(--accent));margin-right:.4rem}@media(max-width:880px){.concept-layout{grid-template-columns:1fr}.aside{position:static}.site-nav{gap:.8rem;font-size:.85rem}}.aw-page{padding-top:2rem;padding-bottom:4rem}.aw-head{margin:.6rem 0 1.4rem}.aw-head h1{margin:.5rem 0 .7rem}.aw-question{font-size:1.12rem;line-height:1.5;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--strand-color, var(--accent));border-radius:var(--radius);padding:.85rem 1.1rem;margin:0;box-shadow:var(--shadow)}.aw-goal{margin:.7rem 0 0;color:var(--ink-soft);font-size:.95rem}.aw-stage{position:relative;width:100%;aspect-ratio:3 / 2;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;margin:1.4rem 0}#aw-canvas{display:block;width:100%;height:100%;touch-action:none}#aw-canvas.is-solved{box-shadow:inset 0 0 0 4px #2f9e44}.aw-solved{position:absolute;top:.7rem;right:.7rem;pointer-events:none;z-index:2}.aw-solved span{display:inline-flex;align-items:center;gap:.3rem;background:#2f9e44;color:#fff;font-weight:700;font-size:.82rem;letter-spacing:.01em;padding:.3rem .72rem;border-radius:999px;box-shadow:0 3px 10px #2f9e4459;animation:aw-pop .3s cubic-bezier(.2,1.4,.4,1)}@keyframes aw-pop{0%{transform:scale(.5);opacity:0}to{transform:scale(1);opacity:1}}.aw-controls{display:flex;flex-wrap:wrap;gap:1rem 1.6rem;align-items:flex-end}.aw-control{display:flex;flex-direction:column;gap:.35rem;min-width:12rem;flex:1 1 12rem}.aw-control label{font-size:.82rem;font-weight:700;color:var(--ink-soft);letter-spacing:.02em}.aw-control .aw-val{font-variant-numeric:tabular-nums;color:var(--strand-color, var(--accent));font-weight:800}.aw-control input[type=range]{width:100%;accent-color:var(--strand-color, var(--accent));height:1.6rem}.aw-control select,.aw-control input[type=number]{font:inherit;padding:.4rem .6rem;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink)}.aw-btn{font:inherit;font-weight:700;cursor:pointer;border:1px solid var(--line);background:var(--surface);color:var(--ink);padding:.55rem 1.1rem;border-radius:999px;transition:background .15s,border-color .15s}.aw-btn:hover{background:var(--accent-soft);border-color:var(--strand-color, var(--accent))}.aw-btn.primary{background:var(--strand-color, var(--accent));color:#fff;border-color:transparent}.aw-btn.primary:hover{filter:brightness(1.08)}.aw-note{margin:1.4rem 0 0;color:var(--ink-soft);font-size:.95rem}.aw-note:empty{display:none}.aw-back{margin:2rem 0 0;font-size:.95rem;color:var(--ink-faint)}.aw-panel{--strand-color: var(--strand-color, var(--accent))}.aw-panel .aw-list{list-style:none;margin:0;padding:0;display:grid;gap:.5rem}.aw-panel .aw-list a{display:block;font-weight:600}.aw-panel .aw-list .aw-blurb{display:block;font-size:.85rem;color:var(--ink-soft);font-weight:400}.aw-play-cta{display:inline-flex;align-items:center;gap:.4rem;margin-top:.3rem;font-weight:700;color:var(--strand-color, var(--accent))}.aw-gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(15rem,1fr));gap:1rem;margin:1.6rem 0}.aw-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1rem 1.1rem;box-shadow:var(--shadow);border-top:3px solid var(--card-color, var(--accent));transition:transform .12s}.aw-card:hover{transform:translateY(-2px);text-decoration:none}.aw-card .aw-card-title{font-weight:700;color:var(--ink);margin:.3rem 0}.aw-card .aw-card-blurb{font-size:.86rem;color:var(--ink-soft)}
