:root{color:#1f2933;background:#f5f7fb;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}button{border:0;border-radius:6px;background:#1f6feb;color:#fff;cursor:pointer;font:inherit;font-weight:700;padding:.72rem 1rem}button:hover,button:focus-visible{background:#174ea6}#app{min-height:100vh}.screen{min-height:100vh;display:grid;place-items:center;padding:24px}.start-panel{width:min(520px,100%);display:grid;gap:16px;text-align:center}.start-panel h1{margin:0;color:#111827;font-size:clamp(2.6rem,7vw,5rem);letter-spacing:0}.start-panel p{margin:0;color:#52606d;font-size:1.05rem;line-height:1.5}.game-shell{min-height:100vh;display:grid;grid-template-rows:auto 1fr;gap:18px;padding:18px}.hud{width:min(760px,100%);margin:0 auto;display:grid;grid-template-columns:1fr auto;align-items:center;gap:12px}.status{min-height:3.2rem}.status-title{margin:0;color:#111827;font-size:1.35rem;letter-spacing:0}.status-detail{margin:2px 0 0;color:#52606d;font-size:.95rem}.board-wrap{display:grid;place-items:start center}canvas{width:min(92vw,680px);height:min(92vw,680px);max-height:calc(100vh - 128px);background:#fffdf7;border:1px solid #a7b1bd;box-shadow:0 16px 38px #1f293324;touch-action:none}@media(max-width:560px){.game-shell{padding:12px}.hud{grid-template-columns:1fr}.hud button{width:100%}}