html,body{height:100%;overflow:hidden;touch-action:none;user-select:none;-webkit-user-select:none}#app{display:flex;flex-direction:column;align-items:center;max-width:524px;margin:0 auto;padding:12px;height:100%}.header{width:100%;display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.title{font-size:2rem;font-weight:800;color:var(--text)}.header-right{display:flex;gap:8px;align-items:center}.timer{background:var(--score-bg);color:var(--score-text);border-radius:6px;padding:6px 16px;text-align:center;min-width:70px;font-size:1.3rem;font-weight:700;font-variant-numeric:tabular-nums}.mistakes{background:var(--score-bg);color:var(--score-text);border-radius:6px;padding:6px 16px;text-align:center;min-width:60px;font-size:1rem;font-weight:600}.controls{width:100%;display:flex;gap:8px;margin-bottom:12px}.controls .btn{flex:1}#game-canvas{display:block;border-radius:4px;cursor:pointer}.numpad{display:grid;grid-template-columns:repeat(9,1fr);gap:4px;width:100%;max-width:500px;margin-top:12px}.numpad-btn{aspect-ratio:1;border:none;border-radius:8px;font-size:1.2rem;font-weight:700;cursor:pointer;background:var(--btn-secondary-bg);color:var(--btn-secondary-text);transition:opacity .15s;display:flex;align-items:center;justify-content:center}.numpad-btn:active{opacity:.7}.numpad-erase,.numpad-notes,.numpad-undo{grid-column:span 3;aspect-ratio:auto;padding:10px 0;font-size:1.1rem}.numpad-notes.active{background:var(--btn-primary-bg);color:var(--btn-primary-text)}.difficulty-list{display:flex;flex-direction:column;gap:8px;margin:16px 0;max-width:320px}.difficulty-option{text-align:left;padding:12px 16px!important;font-size:.95rem!important}.difficulty-option.selected{border-left:3px solid #1976d2}.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:16px 0;max-width:280px}.stat-item{background:var(--score-bg);border-radius:6px;padding:12px 8px;text-align:center}.stat-value{font-size:1.5rem;font-weight:800;color:var(--score-text)}.stat-label{font-size:.65rem;text-transform:uppercase;letter-spacing:1px;color:var(--score-text);opacity:.8;margin-top:2px}@media(max-height:600px){.title{font-size:1.5rem}.timer{font-size:1rem;padding:4px 12px}.mistakes{font-size:.85rem;padding:4px 10px}.controls{margin-bottom:8px}.numpad{margin-top:8px;gap:2px}.numpad-btn{font-size:1rem}}@media(orientation:landscape)and (min-width:640px){#app{display:grid;grid-template-columns:1fr 1fr;gap:8px 16px;align-items:center;max-width:900px;margin:0 auto;padding:8px 16px}#game-canvas{grid-column:1;grid-row:1 / span 20;align-self:center;margin-left:auto;margin-right:auto}.numpad{grid-column:2;width:260px}.controls{grid-column:2}.controls .btn{font-size:.85rem;padding:6px 8px}}@media(prefers-reduced-motion:reduce){#game-canvas{transition:none}}