:root{color-scheme:dark;font-family:"Noto Serif SC",Songti SC,SimSun,serif;background:#142414;color:#f5e7c6}*{box-sizing:border-box}html,body,#root{min-height:100%;margin:0}button{font:inherit}.app-shell{min-height:100vh;display:flex;flex-direction:column;align-items:center;gap:16px;padding:18px;background:radial-gradient(circle at 50% 0%,rgba(212,175,55,.15),transparent 34rem),linear-gradient(135deg,#172817,#254225 45%,#132313)}.game-header{width:min(100%,1080px);display:flex;align-items:center;justify-content:space-between;gap:12px}.game-header h1{margin:0;color:#f0c85a;font-size:clamp(28px,6vw,42px);letter-spacing:0;line-height:1.1}.game-header p{margin:5px 0 0;color:#a9bf8f;font-size:14px}.game-layout{width:min(100%,1080px);display:grid;grid-template-columns:minmax(170px,220px) auto minmax(170px,220px);align-items:start;justify-content:center;gap:16px}.side-column{display:flex;flex-direction:column;gap:12px;min-width:0}.panel{border:1px solid rgba(245,231,198,.12);border-radius:8px;padding:12px;background:#090f0a7a;box-shadow:0 8px 28px #0003}.player-panel.active{border-color:#f0c85a99;box-shadow:0 0 0 1px #f0c85a2e,0 8px 28px #00000038}.panel-title{display:flex;align-items:center;gap:8px;color:#f0c85a;font-weight:800}.panel-title small{padding:2px 7px;border-radius:999px;background:#f0c85a21;color:#f0c85a;font-size:11px}.panel-title .danger{background:#dc26262e;color:#ff8a8a}.panel-subtitle,.empty-text{margin-top:8px;color:#8ea879;font-size:12px}.captured-pieces{display:flex;flex-wrap:wrap;gap:4px 8px;margin-top:7px;font-weight:800}.red-text{color:#ff9a82}.black-text{color:#d8e5ef}.history-panel ol{margin:8px 0 0;padding-left:22px;color:#d9cba8;font-size:13px;line-height:1.7}.status-panel strong{display:block;margin-top:8px;color:#f6d488;font-size:18px}.actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:14px}.actions button,.ghost-button,.primary-button{min-height:38px;border:1px solid rgba(240,200,90,.45);border-radius:8px;background:#f0c85a1f;color:#f0c85a;cursor:pointer}.actions button:disabled{cursor:not-allowed;opacity:.38}.ghost-button{padding:8px 12px;white-space:nowrap}.primary-button{padding:10px 22px;background:#d8a73d;color:#1c1207;font-weight:800}.board-wrap{padding:10px;border:1px solid rgba(245,231,198,.12);border-radius:8px;background:linear-gradient(145deg,#65370f,#3b220b);box-shadow:0 16px 44px #00000075}.board-wrap[aria-busy=true]{opacity:.72;pointer-events:none}.board{position:relative;overflow:hidden;border:3px solid #7a4a10;border-radius:6px;background:linear-gradient(145deg,#d9ad5c,#c98e2c 55%,#aa6d1c);box-shadow:inset 0 1px #fff3;touch-action:manipulation}.board-lines{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.board-cell{position:absolute;display:flex;align-items:center;justify-content:center;padding:0;border:0;background:transparent;cursor:pointer}.move-dot{width:35%;height:35%;border-radius:50%;background:#facc15b8;box-shadow:0 0 10px #facc1573}.capture-ring,.check-ring{position:absolute;top:3px;right:3px;bottom:3px;left:3px;border-radius:50%;border:3px solid rgba(250,204,21,.72)}.check-ring{border-color:#ef4444db;box-shadow:0 0 16px #ef444480}.chess-piece{position:relative;display:flex;align-items:center;justify-content:center;flex-shrink:0;border:2px solid;border-radius:50%;cursor:pointer;font-weight:900;line-height:1;transition:transform .12s ease,box-shadow .12s ease}.chess-piece:hover{transform:translateY(-1px)}.piece-ring{position:absolute;top:11%;right:11%;bottom:11%;left:11%;border:1px solid currentColor;border-radius:50%;opacity:.35}.piece-text{position:relative;z-index:1}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:20;display:flex;align-items:center;justify-content:center;padding:16px;background:#000000c7}.mode-dialog{width:min(100%,540px);border:1px solid rgba(240,200,90,.55);border-radius:8px;padding:24px;background:linear-gradient(145deg,#231606,#35220c);box-shadow:0 24px 70px #000000b8}.mode-dialog h2{margin:0 0 18px;color:#f0c85a;font-size:28px;text-align:center}.mode-grid{display:grid;gap:10px}.mode-button{display:grid;gap:5px;width:100%;min-height:72px;padding:14px 16px;border:1px solid rgba(240,200,90,.35);border-radius:8px;background:#f0c85a1a;color:#f3ddb1;text-align:left;cursor:pointer}.mode-button strong{color:#f0c85a;font-size:17px}.mode-button span{color:#a9bf8f;font-size:13px}.win-dialog{text-align:center}.win-dialog p{color:#a9bf8f}@media (max-width: 860px){.app-shell{gap:10px;padding:12px 8px}.game-header{padding:0 6px}.game-layout{display:flex;flex-direction:column;align-items:center;gap:10px}.side-column{width:min(100%,560px);display:grid;grid-template-columns:1fr}.history-panel{display:none}.board-wrap{max-width:100%;padding:7px}}@media (max-width: 420px){.game-header h1{font-size:26px}.ghost-button{min-height:34px;padding:6px 9px;font-size:13px}.panel{padding:10px}}