:root{--primary:#7f52ff;--secondary:#21b0f3;--accent:#f18e00;--text:#e2e8f0;--text-secondary:#a0aec0;--background:#1a202c;--card-bg:#2d3748;--border:#4a5568;--cell-bg:#1a202c}body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background-color:var(--background);color:var(--text);min-height:100vh}.game-container{max-width:900px;margin:0 auto;padding:2rem 1rem}.header{text-align:center;margin-bottom:2rem}.header h1{font-size:2.5rem;color:var(--primary);margin:0;font-weight:700}.subtitle{font-size:1.1rem;color:var(--text-secondary);margin-top:.5rem;letter-spacing:.5px}.game-area{display:flex;gap:2rem;justify-content:center;flex-wrap:wrap}.board-container{background-color:var(--card-bg);border-radius:12px;padding:1.5rem;box-shadow:0 8px 16px rgba(0,0,0,.3);border:1px solid var(--border)}.board{border:2px solid var(--border);background-color:var(--cell-bg);border-radius:4px;overflow:hidden}.row{display:flex}.cell{width:25px;height:25px;border:1px solid var(--background);background-color:var(--cell-bg)}.cell.filled{border:1px solid rgba(255,255,255,.1)}.game-info{display:flex;flex-direction:column;gap:1.5rem;min-width:180px}.info-card{background-color:var(--card-bg);border-radius:12px;padding:1.25rem;box-shadow:0 8px 16px rgba(0,0,0,.3);border:1px solid var(--border);position:relative}.info-card h3{margin-top:0;margin-bottom:.75rem;font-size:1rem;color:var(--text-secondary);font-weight:500;letter-spacing:.5px}.preview{flex-direction:column;align-items:center;padding:.5rem;background-color:var(--background);border-radius:6px;border:1px solid var(--border)}.preview,.preview-row{display:flex;gap:2px}.preview-cell{width:20px;height:20px;border:1px solid var(--border);background-color:var(--cell-bg);border-radius:2px}.level-value,.score-value{font-size:2rem;font-weight:700;color:var(--primary);text-align:center;left:0;top:30%}.controls{display:flex;flex-direction:column;gap:.75rem}.control-button{background-color:var(--primary);color:white;border:none;padding:.75rem;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s;box-shadow:0 4px 6px rgba(0,0,0,.1)}.control-button:hover{background-color:#6b46e1;transform:translateY(-1px);box-shadow:0 6px 8px rgba(0,0,0,.15)}.control-button.accent{background-color:var(--accent)}.control-button.accent:hover{background-color:#e07f00}.game-over{background-color:var(--card-bg);padding:1.5rem;border-radius:12px;text-align:center;box-shadow:0 8px 16px rgba(0,0,0,.3);border:1px solid var(--border);animation:fadeIn .3s ease-out}.game-over h2{margin-top:0;color:var(--primary);font-size:1.75rem}.final-score{font-size:1.25rem;margin:1rem 0;color:var(--text)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width:768px){.game-area{flex-direction:column;align-items:center}.game-info{flex-direction:row;flex-wrap:wrap;justify-content:center;width:100%}.info-card{min-width:calc(50% - 1rem)}.controls{width:100%}}