.game-container{background:linear-gradient(180deg,#1a1a2e,#16213e)}.hint-area{text-align:center;padding:.5rem 1rem;min-height:2rem;color:var(--color-text-secondary);font-size:.875rem;opacity:0;transition:opacity .3s ease}.hint-area.visible{opacity:1;color:var(--color-accent)}.game-board{display:flex;justify-content:center;align-items:center;min-height:400px}#game-canvas{border-radius:var(--radius-lg);box-shadow:0 4px 20px #0000004d}.game-overlay-title.win{color:var(--color-success)}.puzzle-title{font-size:1.25rem;color:var(--color-text-secondary);margin-bottom:.5rem}.stats-summary{font-size:1rem;color:var(--color-text-primary);margin-bottom:1.5rem}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}.shake{animation:shake .4s ease-in-out}@keyframes celebrate{0%{transform:scale(1)}50%{transform:scale(1.1)}to{transform:scale(1)}}.celebrate{animation:celebrate .5s ease-in-out}.level-nav{display:flex;justify-content:space-between;align-items:center;padding:.5rem 1rem;gap:1rem}.level-progress{font-size:.875rem;color:var(--color-text-secondary);flex:1;text-align:center}.game-btn:disabled{opacity:.5;cursor:not-allowed}.game-btn:active:not(:disabled){transform:scale(.95)}@media(prefers-color-scheme:dark){.game-container{background:linear-gradient(180deg,#0f0f1a,#1a1a2e)}}@media(prefers-reduced-motion:reduce){.shake,.celebrate{animation:none}.hint-area{transition:none}}@media(max-width:400px){.game-board{min-height:350px}.level-nav{padding:.5rem}.level-progress{font-size:.75rem}}