*{margin:0;padding:0;box-sizing:border-box}html,body{width:100%;height:100%;overflow:hidden;background:#1a1a2e;font-family:Noto Sans KR,-apple-system,sans-serif}#app{position:relative;width:100%;height:100%;display:flex}#board-area{flex:1;position:relative;display:flex;justify-content:center;align-items:center;min-width:0}#game-canvas{display:block}#ui-overlay{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none}#sidebar{width:280px;flex-shrink:0;display:flex;flex-direction:column;gap:8px;padding:16px;overflow-y:auto}#control-panel{pointer-events:auto}#score-panel{pointer-events:none}:root{--board-bg: transparent;--board-line: #8B7355;--board-node-fill: #FFF8DC;--board-node-stroke: #8B7355;--board-corner-fill: #FFE4B5;--board-center-fill: #FFD700;--board-start-fill: #FFA07A;--board-label-color: #5C4033;--piece-streamer: #FF6B6B;--piece-streamer-stroke: #CC0000;--piece-viewer: #4DABF7;--piece-viewer-stroke: #1971C2;--ui-bg: rgba(0, 0, 0, .85);--ui-text: #FFFFFF;--ui-accent: #FFD43B;--panel-bg: rgba(0, 0, 0, .85);--panel-radius: 12px}