:root{--board-bg: #0d1117;--board-surface: rgba(255, 255, 255, .04);--board-border: rgba(255, 255, 255, .08);--board-border-accent: rgba(255, 255, 255, .12);--board-radius: 8px;--score-gold: #d4a843;--rune-red: #e63946;--rune-purple: #a78bfa;--mana-blue: #60a5fa;--hp-green: #22c55e;--hp-red: #ef4444;--text-primary: #e8e8e8;--text-secondary: #888;--text-dim: #555}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--board-bg);color:var(--text-primary);overflow:hidden;-webkit-font-smoothing:antialiased}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#ffffff26;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#ffffff40}button{cursor:pointer;transition:filter .1s ease,transform .1s ease}button:hover{filter:brightness(1.1)}button:active{transform:scale(.98)}input:focus{border-color:#3b82f6!important;outline:none}.zone-label{font-size:10px;text-transform:uppercase;letter-spacing:1px;font-weight:700}.card-lift{transition:transform .15s ease,box-shadow .15s ease}.card-lift:hover{transform:translateY(-4px) scale(1.02);box-shadow:0 8px 20px #0006}.board-cell{background:var(--board-surface);border:1px solid var(--board-border);border-radius:var(--board-radius);padding:6px 8px}.opponent-side{opacity:.9}.player-side{opacity:1}