:root{--radius: 8px;--shadow: 0 1px 2px rgba(0,0,0,.25);color-scheme:dark}[data-theme=night]{--bg:#0e1726;--surface:#142033;--surface-2:#1b2740;--text:#e7eef7;--muted:#8aa0b8;--accent:#22d3ee;--accent-contrast:#04121f;--border:rgba(255,255,255,.08);--board-light:#1b2740;--board-dark:#16203a;--piece-w:#f0f6ff;--piece-w-line:#16203a;--piece-b:#222c3b;--piece-b-line:#b6c4d6;--highlight:rgba(34,211,238,.55);--select:rgba(255,210,40,.7);--check:#ff6b6b}[data-theme=light]{--bg:#eef2f8;--surface:#ffffff;--surface-2:#f4f6fb;--text:#1f2a44;--muted:#5b6b86;--accent:#4f46e5;--accent-contrast:#ffffff;--border:#e3e8f0;--board-light:#eef2f8;--board-dark:#dfe6f1;--piece-w:#ffffff;--piece-w-line:#8a97ad;--piece-b:#2a3344;--piece-b-line:#10151f;--highlight:rgba(79,70,229,.45);--select:rgba(230,160,20,.7);--check:#e23d3d}[data-theme=wood]{--bg:#15110d;--surface:#1d1812;--surface-2:#241d15;--text:#f0e6d8;--muted:#b09a80;--accent:#c2762f;--accent-contrast:#1a120a;--border:#2c241b;--board-light:#e9d2a8;--board-dark:#b58863;--piece-w:#f7f2e7;--piece-w-line:#5b4636;--piece-b:#2a1d12;--piece-b-line:#e9d2a8;--highlight:rgba(194,118,47,.6);--select:rgba(255,210,120,.75);--check:#e0584a}*{box-sizing:border-box}body{margin:0;font-family:system-ui,sans-serif;background:var(--bg);color:var(--text)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0)}.topnav{display:flex;align-items:center;gap:10px;padding:12px 18px;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:5}.topnav .brand{font-weight:800;letter-spacing:.3px;color:var(--text);background:transparent;border:0;cursor:pointer;padding:6px 10px 6px 0;font-size:16px}.topnav button{background:transparent;color:var(--muted);border:0;padding:6px 14px;border-radius:999px;cursor:pointer;font-weight:600}.topnav button.on{background:var(--accent);color:var(--accent-contrast)}.home{max-width:960px;margin:0 auto;padding:32px 20px 56px}.hero{position:relative;text-align:center;padding:56px 20px 48px;border:1px solid var(--border);border-radius:calc(var(--radius) * 2);background:radial-gradient(120% 140% at 50% -10%,color-mix(in srgb,var(--accent) 18%,transparent),transparent 60%),var(--surface);overflow:hidden}.hero-pieces{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;margin-bottom:18px;opacity:.85}.hero-pieces .piece{width:46px;height:46px}.hero-title{font-size:clamp(40px,8vw,72px);margin:0;letter-spacing:.5px;font-weight:800}.hero-tag{max-width:540px;margin:14px auto 0;color:var(--muted);font-size:18px;line-height:1.5}.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:28px}.btn-primary{background:var(--accent);color:var(--accent-contrast);border:0;padding:12px 28px;border-radius:999px;font-weight:700;font-size:16px;cursor:pointer;box-shadow:var(--shadow)}.btn-ghost{background:var(--surface-2);color:var(--text);border:1px solid var(--border);padding:12px 24px;border-radius:999px;font-weight:600;font-size:16px;cursor:pointer}.btn-primary:hover,.btn-ghost:hover{filter:brightness(1.08)}.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-top:28px}.feature-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.feature-card h3{margin:0 0 6px}.feature-card p{margin:0;color:var(--muted);line-height:1.5}.home-about{margin-top:40px}.home-about h2{margin:0 0 10px;font-size:24px}.home-about p{margin:0;color:var(--text);line-height:1.7;max-width:70ch}.learn{max-width:1140px;margin:0 auto;padding:28px 24px 64px}.learn-hero{text-align:center;padding:18px 0 8px}.learn-hero h1{font-size:clamp(30px,6vw,48px);margin:0 0 10px}.learn-hero p{max-width:680px;margin:0 auto;color:var(--muted);line-height:1.6;font-size:17px}.learn-section{margin-top:48px}.learn-section>h2{font-size:26px;margin:0 0 6px;padding-bottom:8px;border-bottom:1px solid var(--border)}.section-note{color:var(--muted);margin:10px 0 8px;line-height:1.5}.piece-list{display:flex;flex-direction:column}.piece-row{display:flex;gap:40px;align-items:center;padding:32px 4px}.piece-row+.piece-row{border-top:1px solid var(--border)}.piece-row:nth-child(2n){flex-direction:row-reverse}.piece-row-body{flex:1;min-width:0}.piece-row-body h3{margin:0 0 10px;font-size:24px}.piece-row-body p{margin:0;color:var(--text);line-height:1.65;font-size:16px;max-width:48ch}.rules-group{font-size:18px;margin:26px 0 0;color:var(--text)}.rules{margin:8px 0 0}.rules dt{font-weight:700;margin-top:16px;color:var(--accent)}.rules dd{margin:4px 0 0;color:var(--text);line-height:1.6;max-width:80ch}.learn-cta{text-align:center;margin-top:48px}.move-diagram{flex:0 0 auto;display:inline-flex;flex-direction:column;border:1px solid var(--border);box-shadow:var(--shadow)}.md-row{display:flex}.md-cell{width:30px;height:30px;display:flex;align-items:center;justify-content:center}.md-cell.light{background:var(--board-light)}.md-cell.dark{background:var(--board-dark)}.md-cell .piece{width:30px;height:30px}.md-dot{width:11px;height:11px;border-radius:50%;background:var(--highlight)}.md-cap{width:16px;height:16px;border-radius:50%;border:3px solid var(--check);box-sizing:border-box;display:flex;align-items:center;justify-content:center}.md-cap .md-dot{width:6px;height:6px}@media (max-width:640px){.piece-row,.piece-row:nth-child(2n){flex-direction:column;gap:18px;align-items:flex-start}.md-cell,.md-cell .piece{width:24px;height:24px}}.topnav-right{margin-left:auto;display:flex;align-items:center;gap:8px}.picker{position:relative}.picker-trigger{display:flex;align-items:center;gap:7px;background:var(--surface-2);color:var(--text);border:1px solid var(--border);border-radius:var(--radius);padding:5px 9px;cursor:pointer;font-weight:600;font-size:13px}.picker-label{white-space:nowrap}.picker-caret{color:var(--muted);font-size:10px}.picker-list{position:absolute;right:0;top:calc(100% + 4px);z-index:20;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:4px;min-width:100%;display:flex;flex-direction:column;gap:2px}.picker-opt{display:flex;align-items:center;gap:8px;width:100%;text-align:left;background:transparent;color:var(--text);border:0;border-radius:6px;padding:6px 10px;cursor:pointer;font-size:13px;white-space:nowrap}.picker-opt:hover{background:var(--surface-2)}.picker-opt.on{background:var(--accent);color:var(--accent-contrast)}.flag{height:13px;width:auto;border-radius:2px;display:block;box-shadow:0 0 0 1px #0000002e}.theme-swatch{display:inline-flex;border-radius:3px;overflow:hidden;box-shadow:0 0 0 1px var(--border)}.theme-swatch i{width:8px;height:13px;display:block}.play-view{display:flex;gap:22px;padding:22px;align-items:flex-start;justify-content:center}.play-main{position:relative}.board{display:inline-block;border:1px solid var(--border);box-shadow:var(--shadow)}.board-row{display:flex}.cell{width:48px;height:48px;padding:0;border:0;display:flex;align-items:center;justify-content:center;cursor:pointer}.cell.light{background:var(--board-light)}.cell.dark{background:var(--board-dark)}.cell.target{box-shadow:inset 0 0 0 3px var(--highlight)}.cell.sel{box-shadow:inset 0 0 0 3px var(--select)}.piece{width:40px;height:40px;display:flex;align-items:center;justify-content:center}.piece img{width:100%;height:100%;object-fit:contain;display:block}.play-side{width:240px;display:flex;flex-direction:column;gap:12px}.status{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:10px 12px}.status-newking{color:var(--accent);font-weight:700}.controls{display:flex;gap:6px;flex-wrap:wrap}.controls button{background:var(--surface-2);color:var(--text);border:1px solid var(--border);padding:6px 12px;border-radius:var(--radius);cursor:pointer}.controls button:disabled{opacity:.4;cursor:default}.move-history{max-height:240px;overflow:auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:8px 8px 8px 28px;margin:0}.captured{display:flex;flex-direction:column;gap:6px}.captured-row{display:flex;gap:4px;align-items:center;flex-wrap:wrap}.captured-row .label{font-size:12px;color:var(--muted)}.captured-row .piece{width:24px;height:24px}.promo-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:#00000080}.promo-box{background:var(--surface);border:1px solid var(--border);padding:14px;border-radius:var(--radius);display:flex;gap:6px;flex-wrap:wrap;max-width:240px}.promo-box button{background:var(--surface-2);color:var(--text);border:1px solid var(--border);padding:6px 10px;border-radius:var(--radius);cursor:pointer}.online{padding:22px}.you-are{font-weight:700;color:var(--accent);text-align:center;margin:0 0 12px}.lobby{max-width:520px;margin:32px auto;background:var(--surface);border:1px solid var(--border);border-radius:calc(var(--radius) * 1.5);padding:8px;box-shadow:var(--shadow)}.lobby-tabs{display:flex;gap:4px;background:var(--surface-2);border-radius:var(--radius);padding:4px}.lobby-tabs button{flex:1;background:transparent;color:var(--muted);border:0;padding:10px 8px;border-radius:calc(var(--radius) - 2px);cursor:pointer;font-weight:600;font-size:14px}.lobby-tabs button.on{background:var(--accent);color:var(--accent-contrast)}.lobby-section{padding:26px 22px 22px;display:flex;flex-direction:column;gap:10px;align-items:flex-start}.lobby-section h3{margin:0;font-size:20px}.lobby-section p{margin:0 0 6px;color:var(--muted);line-height:1.5}.lobby-join{display:flex;gap:8px;width:100%}.lobby-join input{background:var(--surface-2);color:var(--text);border:1px solid var(--border);border-radius:var(--radius);padding:10px;flex:1;letter-spacing:1px}.lobby-status{text-align:center;color:var(--accent);margin:4px 0 12px}.lobby-connecting{text-align:center;color:var(--check);margin:6px 0;font-size:13px}