:root{--bg: #f8f9fa;--card: #ffffff;--text: #2c3e50;--muted: #6c7a89;--primary: #3498db;--accent: #2ecc71;--hover-line: #f39c12;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;--dot: #2c3e50}:root[data-theme=dark],html[data-theme=dark]{--bg: #131419;--card: #0f1720;--text: #e6eef6;--muted: #9aa6b2;--primary: #2b9adf;--accent: #27ae60;--dot: #6b7780;--box-player-0: #7a2f2a;--box-player-1: #254e6a;--input-bg: #15191d;--input-border: #2a3338;--hover-line: #f6c85f;--violation-line: #e74c3c}:root{--violation-line: #e74c3c}body{margin:0;min-height:100vh;background-color:var(--bg);color:var(--text)}*{box-sizing:border-box}.app-container{max-width:960px;margin:0 auto;padding:2rem 1rem 3rem;display:flex;flex-direction:column;align-items:center;gap:1.5rem}.mode-content{width:100%;background:var(--card);border-radius:12px;padding:1.5rem;box-shadow:0 8px 24px #00000014}.main-title{margin:0;font-size:1.2rem;font-weight:800;letter-spacing:2px;text-align:center;color:var(--muted)}.section-title{margin:0;font-size:2.2rem;font-weight:700;text-align:center}.controls-row{display:flex;flex-wrap:wrap;gap:.75rem;align-items:center;justify-content:center}button{padding:.5rem 1rem;font-size:1rem;border-radius:8px;border:none;cursor:pointer;background:var(--primary);color:#fff;transition:background .2s ease,transform .1s ease}button:disabled{cursor:not-allowed;background:#bdc3c7;color:#ecf0f1}button:not(:disabled):hover{background:#2c80b4}button:not(:disabled):active{transform:translateY(1px)}input[type=range]{width:240px}textarea{width:100%;min-height:120px;padding:.75rem;border-radius:8px;border:1px solid rgba(0,0,0,.08);font-family:inherit;resize:vertical}:root[data-theme=dark] textarea,:root[data-theme=dark] input[type=text],:root[data-theme=dark] input[type=range]{background:var(--input-bg);border:1px solid var(--input-border);color:var(--text)}.scoreboard{display:flex;justify-content:space-around;gap:1rem;margin:1rem 0;text-align:center}.scoreboard .player{padding:.5rem .75rem;border-radius:8px;min-width:120px}.scoreboard .player-current{background:#2ecc7114;box-shadow:0 4px 12px #0000000f}.player-score{color:var(--text)}.scoreboard .player-label{font-weight:600}.game-status{text-align:center;margin-bottom:1rem}.replay-controls{display:flex;flex-wrap:wrap;gap:.75rem;justify-content:center;align-items:center}.turn-indicator{font-weight:600}.replay-status{margin-top:1rem;text-align:center}.mode-content svg{display:block;margin:0 auto;width:100%;max-width:640px;height:auto}.singleplayer-board-wrapper{width:640px!important;max-width:100%;margin:0 auto!important;display:flex;justify-content:center;align-items:center}.board-svg-wrapper{width:100%;max-width:640px;margin:0 auto;display:flex;justify-content:center}:root{--box-player-0: #f9d0cc;--box-player-1: #cfe7fb}