:root{color-scheme:light}body{margin:0;font-family:sans-serif;background:#f5f0e6}#app{display:flex;flex-direction:column;align-items:center;padding:8px}.board{display:grid;grid-template-columns:repeat(9,1fr);grid-template-rows:repeat(9,1fr);aspect-ratio:1;width:min(100vw,480px);border:2px solid #333}.board button{position:relative;border:1px solid #999;background:wheat;min-width:44px;min-height:44px;display:flex;align-items:center;justify-content:center;font-size:clamp(12px,4vw,24px);padding:0;cursor:pointer}.board button.highlight{outline:3px solid #2a7;outline-offset:-3px}.board button.highlight:after{content:"";position:absolute;width:8px;height:8px;border-radius:50%;background:#2a7}.piece-compact{writing-mode:vertical-rl;font-size:.6em}.piece-gote{display:inline-block;transform:rotate(180deg)}.board button.last-move{background:#ffe9a8}.board button.checked-king{background:#ffb3b3}.status-view{min-height:1.5em;font-weight:700;margin:4px 0}.controls{display:flex;gap:8px;margin:8px 0}.controls button{min-height:44px;padding:0 12px}.hands{display:flex;gap:4px;margin:4px 0}.hands button{min-width:44px;min-height:44px}.record-view-list{max-height:200px;overflow-y:auto}@media (min-width: 768px) and (orientation: landscape){#app{flex-direction:row;align-items:flex-start;justify-content:center;gap:16px}}.title-screen{display:flex;flex-direction:column;align-items:center;gap:12px;padding:24px}.title-side-select button,.title-difficulty-select button{min-height:44px;padding:0 16px;margin:0 4px}.title-side-select button.selected,.title-difficulty-select button.selected{background:#2a7;color:#fff}.title-screen>button[data-action=start]{min-height:44px;padding:0 16px}.end-game-modal-overlay,.promotion-dialog-overlay{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:#00000080}.end-game-modal,.promotion-dialog{background:#fff;padding:24px;border-radius:8px;display:flex;flex-direction:column;gap:12px;align-items:center}.end-game-modal button,.promotion-dialog button{min-height:44px;padding:0 16px}