:root{color-scheme:dark;font-family:Trebuchet MS,Avenir Next,sans-serif;--bg: #102119;--panel: rgba(7, 22, 17, .8);--panel-border: rgba(199, 224, 196, .14);--felt: radial-gradient(circle at top, #2d6945 0%, #133020 58%, #09170f 100%);--ink: #f6f2e7;--muted: #bdd2bc;--accent: #d5b36a;--danger: #c85f5f;--success: #4bd38a;--card-bg: #f8f6ef;--card-ink: #13231a}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at top,rgba(213,179,106,.12),transparent 26%),linear-gradient(180deg,#14281e,#09120c);color:var(--ink)}button{font:inherit;cursor:pointer}button{border:0}.shell{min-height:100vh;padding:20px}.topbar{position:sticky;top:12px;z-index:40;display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:20px;padding:10px 12px;border:1px solid var(--panel-border);border-radius:22px;background:#071611e6;box-shadow:0 14px 40px #0000003d;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.panel h2,.hand h2,.opponent 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