.theme-lab { background: linear-gradient(135deg, #efebe9 0%, #d7ccc8 100%); }
.theme-lab .game-header h1 { color: #e65100; }
.lab-mix { text-align: center; margin: 15px auto; padding: 25px; background: white; border-radius: 16px; max-width: 440px; box-shadow: 0 6px 20px rgba(0,0,0,0.08); }
.beaker { display: inline-block; font-size: 3rem; margin: 0 10px; animation: beakerBubble 1.5s ease-in-out infinite; }
.beaker:nth-child(2) { animation-delay: 0.3s; }
@keyframes beakerBubble { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }
.mix-label { font-size: 1.15rem; font-weight: 700; color: #333; font-family: 'Nunito',sans-serif; margin-top: 8px; }
.plus-sym { font-size: 2rem; color: #f44336; font-weight: 800; vertical-align: middle; }
.lab-options { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; max-width: 400px; margin: 15px auto; padding: 0 15px; }
.lab-opt { padding: 14px; border: 2px solid #d7ccc8; border-radius: 14px; background: white; text-align: center; font-size: 1rem; font-family: 'Nunito',sans-serif; font-weight: 700; cursor: pointer; transition: all 0.2s; }
.lab-opt:hover { background: #efebe9; border-color: #8d6e63; }
.lab-opt.correct { background: #e8f5e9; border-color: #4caf50; }
.lab-opt.wrong { background: #ffebee; border-color: #f44336; }
.lab-opt.disabled { pointer-events: none; opacity: 0.6; }