:root{--x: #ef6a4b;--o: #4a90d9}*{box-sizing:border-box;margin:0;padding:0}html,body{min-height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}#app{min-height:100%;display:flex;align-items:center;justify-content:center;padding:16px}.game{width:min(92vw,400px);display:flex;flex-direction:column;gap:14px}.crumb{font-size:14px}.crumb a{color:var(--accent);text-decoration:none;font-weight:700}.crumb a:hover{text-decoration:underline}.topbar{display:flex;align-items:center;justify-content:space-between}.title{font-size:clamp(30px,8.5vw,44px);font-weight:800;line-height:1;letter-spacing:-1px}.stats{display:flex;gap:8px}.stat{flex:1;background:var(--board-bg);color:var(--accent-text);border-radius:6px;padding:6px 10px;text-align:center}.stat .label{font-size:10px;text-transform:uppercase;letter-spacing:1px;opacity:.85;font-weight:700}.stat .value{font-size:22px;font-weight:800;line-height:1.1}.status{font-size:16px;font-weight:700;text-align:center;min-height:22px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;background:var(--board-bg);padding:10px;border-radius:10px}.cell{aspect-ratio:1 / 1;background:var(--cell-bg);border:none;border-radius:8px;font-size:clamp(40px,14vw,64px);font-weight:800;line-height:1;cursor:pointer;color:var(--text);transition:background .12s ease,transform 80ms ease}.cell:not(.filled):hover{filter:brightness(1.04)}.cell:not(.filled):active{transform:scale(.96)}.cell.filled{cursor:default}.cell.x{color:var(--x)}.cell.o{color:var(--o)}.cell.win{background:#f7e9a0}.controls{display:flex;align-items:center;justify-content:space-between;gap:10px}.how{font-size:13px;opacity:.85;flex:1}.how b{font-weight:700}.btn{background:var(--accent);color:var(--accent-text);border:none;border-radius:6px;padding:10px 16px;font-size:14px;font-weight:700;cursor:pointer;white-space:nowrap;transition:filter .12s ease}.btn:hover{filter:brightness(1.05)}.btn:active{filter:brightness(.95)}