:root{--primary-color: #646cff;--background-color: #ffffff;--text-color: #213547;--grid-color: rgba(0, 0, 0, .1);--snake-color: #4ade80;--snake-head-color: #22c55e;--food-color: #ef4444}body{margin:0;display:flex;justify-content:center;align-items:center;min-width:320px;min-height:100vh;background-color:var(--background-color);color:var(--text-color);font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif}.game-container{width:800px;display:flex;flex-direction:column;align-items:center;gap:2rem}.game-header{width:100%;height:60px;display:flex;justify-content:space-between;align-items:center;padding:0 1rem}.score{font-size:24px;font-weight:700}.game-title{font-size:32px;margin:0}@media (prefers-color-scheme: light){:root{--background-color: #ffffff;--text-color: #213547;--grid-color: rgba(0, 0, 0, .1)}}.game-controls{width:100%;display:flex;justify-content:center;gap:1rem;margin-top:2rem}.control-button{padding:.8rem 1.5rem;font-size:1.1rem;border:2px solid var(--primary-color);border-radius:8px;background:transparent;color:var(--text-color);cursor:pointer;transition:all .2s ease}.control-button:hover,.control-button.primary{background:var(--primary-color);color:var(--background-color)}.control-button.primary:hover{opacity:.9}.game-over{display:flex;flex-direction:column;align-items:center;gap:1rem}.game-over h2{color:#ef4444;margin:0}.score{font-size:1.5rem;font-weight:700}.score span{color:var(--primary-color)}