:root{--bg: #12181c;--panel: #1b2429;--line: #2c383f;--text: #e8eef1;--muted: #8fa3ad;--accent: #4a9c78;--danger: #c2564c;color-scheme:dark}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.5 system-ui,-apple-system,Segoe UI,sans-serif}main{max-width:60rem;margin:0 auto;padding:1rem}h1,h2,h3{font-weight:600;line-height:1.2}button{font:inherit;padding:.5rem .9rem;border:1px solid var(--line);border-radius:.4rem;background:var(--panel);color:var(--text);cursor:pointer}button:hover:not(:disabled){border-color:var(--accent)}button:disabled{opacity:.4;cursor:not-allowed}button.primary{background:var(--accent);border-color:var(--accent);color:#0d1211;font-weight:600}input,select{font:inherit;width:100%;padding:.5rem;border:1px solid var(--line);border-radius:.4rem;background:#0e1417;color:var(--text)}label{display:block;margin-bottom:.75rem;color:var(--muted);font-size:.9rem}label input,label select{margin-top:.25rem;color:var(--text)}.panel{background:var(--panel);border:1px solid var(--line);border-radius:.6rem;padding:1rem;margin-bottom:1rem}.row{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap}.muted{color:var(--muted);font-size:.9rem}.error{color:var(--danger)}.hand{display:flex;flex-wrap:wrap;gap:.3rem}.card{min-width:3.2rem;padding:.9rem .5rem;text-align:left;font-size:1.25rem;font-weight:700;background:#f2f5f4;color:#10171b;border:1px solid #cbd5d1;border-radius:.35rem}.card.red{color:#b3231b}.card:disabled{opacity:.28}.trick{display:flex;gap:.5rem;min-height:4.2rem;align-items:center}.seat{display:flex;justify-content:space-between;padding:.35rem 0;border-bottom:1px solid var(--line)}.seat.active{color:var(--accent);font-weight:600}.timer{height:.4rem;border-radius:.2rem;background:var(--line);overflow:hidden}.timer>div{height:100%;background:var(--accent);transition:width .2s linear}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:.4rem .5rem;border-bottom:1px solid var(--line)}