:root{color-scheme:light;--bg: #ffffff;--surface: #f7f7f8;--surface-2: #fafafa;--border: #e5e7eb;--fg: #0f172a;--fg-muted: #475569;--accent: #2563eb;--accent-hover: #1d4ed8;--accent-soft: #eff6ff;--max: 1080px;--radius: 12px;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .05);--shadow-md: 0 4px 12px rgba(15, 23, 42, .08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI Variable,Segoe UI,system-ui,Inter,Helvetica Neue,Arial,sans-serif;font-feature-settings:"ss01","cv11";line-height:1.55;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-hover);text-decoration:underline}code{font-family:ui-monospace,SFMono-Regular,JetBrains Mono,Menlo,Consolas,monospace;background:var(--surface);border:1px solid var(--border);padding:.1rem .4rem;border-radius:4px;font-size:.88em}.accent{color:var(--accent)}.muted{color:var(--fg-muted)}.small{font-size:.875rem}.nav{max-width:var(--max);margin:0 auto;padding:1.25rem 1.5rem;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);background:#ffffffe6;backdrop-filter:saturate(180%) blur(8px);position:sticky;top:0;z-index:10}.brand{display:inline-flex;align-items:center;gap:.5rem;color:var(--fg);font-weight:700;font-size:1.05rem}.brand:hover{text-decoration:none}.nav nav{display:flex;gap:1.75rem;align-items:center}.nav nav a{color:var(--fg);font-size:.95rem;font-weight:500}.nav nav a.muted{color:var(--fg-muted)}@media (max-width: 640px){.nav nav{display:none}}main{max-width:var(--max);margin:0 auto;padding:0 1.5rem}.section{padding:5rem 0;border-top:1px solid var(--border)}.section:first-of-type{border-top:0}.section-title{font-size:clamp(1.75rem,3.5vw,2.4rem);letter-spacing:-.02em;margin:0 0 .5rem}.section-sub{color:var(--fg-muted);font-size:1.05rem;margin:0 0 2.5rem;max-width:36rem}.hero{padding:5rem 0 4rem;text-align:center}.badge{display:inline-block;font-size:.8rem;font-weight:600;letter-spacing:.02em;text-transform:uppercase;color:var(--accent);background:var(--accent-soft);border:1px solid #dbeafe;padding:.35rem .75rem;border-radius:999px;margin-bottom:1.25rem}h1{font-size:clamp(2.25rem,5vw,3.6rem);letter-spacing:-.03em;line-height:1.1;margin:0 0 1rem;font-weight:800;max-width:22ch;margin-inline:auto}.lede{font-size:clamp(1.05rem,1.8vw,1.25rem);color:var(--fg-muted);max-width:38rem;margin:0 auto 2rem}.cta-row{display:flex;gap:.75rem;justify-content:center;flex-wrap:wrap;margin-bottom:.75rem}.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.85rem 1.4rem;font-size:1rem;font-weight:600;border-radius:10px;border:1px solid transparent;transition:transform .05s ease,background .15s ease,border .15s ease;text-decoration:none!important}.btn.primary{background:var(--accent);color:#fff;box-shadow:var(--shadow-sm)}.btn.primary:hover{background:var(--accent-hover);color:#fff}.btn.secondary{background:#fff;color:var(--fg);border-color:var(--border)}.btn.secondary:hover{background:var(--surface);color:var(--fg)}.btn:active{transform:translateY(1px)}.hero-foot{color:var(--fg-muted);font-size:.875rem;margin:0}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem}.card{background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;transition:border .15s,transform .15s}.card:hover{border-color:#cbd5e1;transform:translateY(-2px)}.icon{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;background:var(--accent-soft);color:var(--accent);border-radius:10px;margin-bottom:1rem}.card h3{font-size:1.1rem;margin:0 0 .5rem;letter-spacing:-.01em}.card p{margin:0;color:var(--fg-muted);font-size:.95rem}.how .steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.5rem}.how li{position:relative;padding:1.25rem 1.25rem 1.25rem 4rem;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border)}.how .num{position:absolute;left:1rem;top:1.1rem;width:2.25rem;height:2.25rem;border-radius:50%;background:var(--accent);color:#fff;font-weight:700;display:inline-flex;align-items:center;justify-content:center}.how h3{margin:0 0 .25rem;font-size:1.1rem}.how p{margin:0;color:var(--fg-muted);font-size:.95rem}.leaderboard .lb-text{max-width:38rem}.leaderboard .badge{background:#fef3c7;color:#92400e;border-color:#fde68a}.alpha-box{background:#fffbeb;border:1px solid #fde68a;border-radius:var(--radius);padding:1.25rem 1.5rem}.alpha-box h3{margin:0 0 .5rem;font-size:1.05rem}.alpha-box p{margin:0;color:#78350f;font-size:.95rem}.alpha-box a{color:#b45309;text-decoration:underline}.prose{max-width:42rem;margin:4rem auto;padding:0 1.5rem}.prose h1{text-align:left;font-size:clamp(2rem,4vw,2.75rem);margin:0 0 .5rem;max-width:none}.prose .updated{color:var(--fg-muted);font-size:.9rem;margin:0 0 2.5rem}.prose h2{font-size:1.4rem;margin-top:2.5rem;margin-bottom:.75rem;letter-spacing:-.01em}.prose h3{font-size:1.1rem;margin-top:1.75rem;margin-bottom:.5rem}.prose p,.prose li{font-size:1rem;color:var(--fg)}.prose ul{padding-left:1.25rem}.prose li{margin-bottom:.4rem}.prose strong{color:var(--fg)}footer{max-width:var(--max);margin:4rem auto 0;padding:2.5rem 1.5rem 3rem;border-top:1px solid var(--border)}.foot-row{display:flex;flex-wrap:wrap;gap:2rem;justify-content:space-between;align-items:flex-start}.foot-row>div{max-width:22rem}.foot-row p{margin:.25rem 0 0}.foot-nav{display:flex;flex-wrap:wrap;gap:1.25rem}.foot-nav a{color:var(--fg-muted);font-size:.9rem}