:root{--felt: #14532d;--felt-dark: #0c3a1f;--ink: #fff;--accent: #1a237e;--card-w: 64px;--card-h: 90px;color-scheme:dark}*{box-sizing:border-box}body{margin:0;background:var(--accent)}.board{min-height:100dvh;background:radial-gradient(ellipse at center,#1e6b3a 0%,var(--felt) 55%,var(--felt-dark) 100%);color:var(--ink);display:flex;flex-direction:column;gap:8px;padding:8px;font-family:system-ui,-apple-system,Segoe UI,sans-serif}.board-header{display:flex;align-items:center;gap:12px;padding:4px 8px}.board-header h1{font-size:1.1rem;margin:0;letter-spacing:.06em}.dealer-line{font-size:.85rem;opacity:.9;margin-right:auto}.card{position:relative;z-index:0;width:var(--card-w);height:var(--card-h);border-radius:8px;border:2px solid #1a237e;background:#fff;color:#111;font-weight:900;box-shadow:0 2px 6px #00000059;transition:transform .15s ease;touch-action:manipulation;display:inline-flex;cursor:pointer;padding:0}.card 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