:root{--bg: #f4f3ef;--panel: #ffffff;--panel-2: #f7f6f2;--accent: #c23b22;--accent-2: #157a6e;--text: #1b1f24;--muted: #5a6675;--soft: #7a8797;--line: #d7d2c8;--code-bg: #ffffff;--code-text: #1b1f24;--chip-bg: #ffffff;--surface-strong: #ffffff;--graph-bg: #ffffff}*{box-sizing:border-box}body{margin:0;font-family:Space Grotesk,IBM Plex Sans,Segoe UI,system-ui,sans-serif;color:var(--text);background:radial-gradient(1200px 600px at 10% -20%,#e9e7df 0%,transparent 60%),radial-gradient(800px 500px at 90% 0%,#e1f1ec 0%,transparent 55%),var(--bg)}header{padding:48px 0 24px;border-bottom:1px solid var(--line)}.wrap{max-width:1100px;margin:0 auto;padding:0 24px}.title{font-size:clamp(24px,3.2vw,38px);letter-spacing:-.02em;margin:0 0 8px}.subtitle{color:var(--muted);font-size:clamp(14px,2vw,18px);margin:0}.meta-serif{font-family:Iowan Old Style,Palatino Linotype,Book Antiqua,Palatino,Times New Roman,serif}.tagline{font-size:clamp(14px,2vw,18px);letter-spacing:.01em;color:var(--muted);opacity:.9;border-left:2px solid var(--line);padding-left:10px;margin-top:12px;background:linear-gradient(90deg,#3f6aa3,#2f7a73,#8c6a3f);-webkit-background-clip:text;background-clip:text;color:transparent}.pill{display:inline-flex;gap:8px;align-items:center;padding:6px 12px;border:1px solid var(--line);border-radius:999px;background:var(--chip-bg);color:var(--muted);font-size:12px;margin-top:16px}.header-row{display:flex;gap:16px;align-items:center;flex-wrap:wrap;justify-content:space-between}main{padding:28px 0 64px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}.two-col{grid-template-columns:repeat(2,minmax(0,1fr))}@media(max-width:800px){.two-col{grid-template-columns:1fr}}.core-grid{margin-bottom:24px}.card{background:linear-gradient(180deg,var(--panel),var(--panel-2));border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:0 8px 20px #00000014}.card h3{margin:0 0 8px;font-size:18px}.card p{margin:0;color:var(--muted);line-height:1.5}.playground-grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}.playground-controls label{display:block;font-size:12px;color:var(--soft);margin-bottom:6px}.playground-controls textarea,.playground-controls input,.playground-controls select{width:100%;border-radius:10px;border:1px solid var(--line);background:var(--panel-2);color:var(--text);padding:10px 12px;font-size:12px;font-family:inherit}.playground-controls textarea{min-height:110px;resize:vertical}.playground-row{display:flex;gap:12px;align-items:center}.playground-output{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-top:12px;font-size:13px;color:var(--text)}.chip-list{display:flex;flex-wrap:wrap;gap:6px}.chip{padding:4px 8px;border-radius:999px;border:1px solid var(--line);font-size:11px;color:var(--muted);background:var(--panel-2)}.chip.hit{color:#0f172a;background:#fcd34d;border-color:#f59e0b}.chip.hit-opposite{color:#0f172a;background:#a7f3d0;border-color:#10b981}.card-title-center{margin:0 0 12px;text-align:center;font-weight:600;color:var(--text);font-size:18px}.intro-card p{margin-bottom:12px}.intro-citation{font-size:13px;color:var(--muted);line-height:1.6;font-family:Iowan Old Style,Palatino Linotype,Book Antiqua,Palatino,Times New Roman,serif;font-style:italic}.intro-label{margin:8px 0 6px;font-size:inherit;letter-spacing:.01em;color:var(--soft)}.gradient-muted{background:linear-gradient(90deg,#2563eb,#3b82f6,#0ea5e9);-webkit-background-clip:text;background-clip:text;color:transparent;-webkit-text-fill-color:transparent}.intro-list{margin:0 0 12px;padding-left:32px;color:var(--muted);line-height:1.6}.intro-list li{margin:4px 0}.panel-spacer{margin-top:24px}.section{margin-top:28px}.section h2{margin:0 0 12px;font-size:22px;display:flex;align-items:center;gap:10px}.gradient-title{background:linear-gradient(90deg,#e39a6b,#60a5fa,#34d399);-webkit-background-clip:text;background-clip:text;color:transparent}.stacked-title span{display:block}.stacked-title{display:block;text-align:left}.accent-line{height:2px;width:56px;background:linear-gradient(90deg,var(--accent),var(--accent-2));border-radius:999px}.list{display:grid;gap:10px}.list-item{border:1px solid var(--line);border-radius:12px;padding:12px 14px;background:var(--surface-strong)}.list-item b{color:var(--accent-2)}.list-item a{color:var(--text);text-decoration:none;display:block}.list-item a:hover{color:var(--accent)}.index-compact{max-height:220px;overflow-y:auto;padding-right:6px;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:6px}.index-compact .list-item{padding:6px 8px;border-radius:8px;background:transparent}.index-compact .list-item a{font-size:12px;line-height:1.2;white-space:normal}.index-compact .list-item.star{border:1px solid var(--line);border-radius:8px;position:relative;padding-left:22px}.index-compact .list-item.star:before{content:"★";position:absolute;left:8px;top:50%;transform:translateY(-50%);color:var(--accent);font-size:11px}.index-compact .list-item.future .icon{margin-right:6px}.flow{display:grid;gap:8px}.flow-step{display:flex;gap:12px;align-items:flex-start;padding:10px 12px;border:1px dashed var(--line);border-radius:12px;background:var(--surface-strong)}.step-dot{width:10px;height:10px;margin-top:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px #ff7a5966;flex:0 0 10px}.code{font-family:JetBrains Mono,Fira Code,ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12px;color:var(--code-text);background:var(--code-bg);border:1px solid var(--line);border-radius:10px;padding:10px 12px;overflow-x:auto}.code.hl{font-size:12.5px;line-height:1.6}.hl-file{color:var(--accent)}.hl-fn{color:var(--accent-2)}.hl-desc{color:var(--muted)}.hl-bullet{color:var(--text)}.graph-box{position:relative;width:100%;border-radius:12px;border:1px solid var(--line);background:var(--graph-bg);overflow:hidden}.graph-tooltip{position:absolute;display:none;max-width:360px;padding:10px 12px;border-radius:10px;background:var(--surface-strong);border:1px solid var(--line);color:var(--text);font-size:12px;box-shadow:0 12px 24px #00000059}.viz{border:1px solid var(--line);border-radius:12px;background:var(--panel-2);padding:12px}.viz-title{font-size:14px;color:var(--text);margin:0 0 8px}.viz-caption{font-size:12px;color:var(--muted);margin:8px 0 0}.chart-grid{display:grid;grid-template-columns:1fr;gap:14px}.math-block{border:1px solid var(--line);border-radius:12px;background:var(--panel-2);padding:14px 16px}.math-block h3{margin:0 0 8px;font-size:16px}table.map{width:100%;border-collapse:collapse;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--panel-2)}table.map th,table.map td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;font-size:13px}table.map th{background:var(--surface-strong);color:var(--text);font-weight:600}table.map tr:last-child td{border-bottom:none}.map-section{font-weight:600;color:var(--accent-2);white-space:nowrap}.fn{cursor:pointer;color:var(--accent-2)}.map-card{position:relative}.math{font-family:"STIX Two Math","Cambria Math",Times New Roman,serif;color:var(--text);font-size:16px;line-height:1.6}.math .frac{display:inline-flex;flex-direction:column;align-items:center;line-height:1.1;margin:0 2px}.math .frac .bar{width:100%;border-top:1px solid var(--text);margin:2px 0}.math .set{border:1px solid var(--line);border-radius:8px;padding:6px 10px;display:inline-block;background:var(--surface-strong)}.quartile-stack{display:grid;grid-template-columns:1fr;gap:10px}.quartile-controls{display:flex;gap:8px;flex-wrap:wrap}.quartile-btn{border:1px solid var(--line);background:var(--surface-strong);color:var(--text);padding:6px 10px;border-radius:999px;font-size:12px;cursor:pointer}.quartile-btn.active{border-color:var(--accent-2);box-shadow:0 0 0 2px #5eead426}.score-stack{display:grid;grid-template-columns:1fr;gap:4px;border:1px dashed var(--line);border-radius:12px;padding:10px;background:var(--panel-2);height:auto;overflow:visible}.score-cell{padding:6px 8px;border-radius:8px;border:1px solid var(--line);background:var(--surface-strong);font-size:12px;display:flex;justify-content:space-between;gap:8px}.score-cell.active{background:#5eead41f;border-color:var(--accent-2)}.score-cell.q1-pair{background:#ff7a591f;border-color:var(--accent)}.score-cell.q2-pair{background:#ffba782e;border-color:#ffba78;box-shadow:inset 3px 0 #ffba78b3}.score-cell.q3-pair{background:#818cf824;border-color:#818cf8;box-shadow:inset 3px 0 #818cf899}#x3-circle,#x1-circle,#x2-circle,#x4-circle{cursor:pointer}.score-rank{color:var(--muted);font-size:11px}.cutline{color:var(--muted);font-size:11px;display:none;margin:6px 0 2px}.cutline b{color:var(--accent-2);font-weight:600}.cutline-line{border-top:1px dashed var(--accent-2);margin:2px 0 6px}.bracket{display:none;text-align:center;color:var(--muted);font-size:11px;letter-spacing:.02em;padding:2px 0 6px}.bracket span{display:inline-block;text-align:left}.bracket .q1-highlight{color:#d6a16e}.bracket .q1-muted{color:#8d98a6}footer{border-top:1px solid var(--line);padding:20px 24px 48px;color:var(--muted);font-size:12px}@media(max-width:640px){header{padding-top:36px}.pill{font-size:11px}}