.explanation-card{display:none;animation:fadeIn .8s ease-in}.explanation-card.active{display:block}.card-header{display:flex;align-items:center;gap:15px;margin-bottom:20px;border-bottom:2px solid #a5d6a7;padding-bottom:15px}.card-icon{font-size:40px}.card-title{font-size:28px;font-weight:700;color:#2e7d32}.card-content{font-size:20px;line-height:2;color:#1b5e20;text-align:justify}.card-content ul{list-style-type:none;padding-right:20px}.card-content li{position:relative;margin-bottom:15px}.card-content li::before{content:"🔬";position:absolute;right:-25px;top:2px}@media (max-width:768px){.card-title{font-size:24px}.card-content{font-size:18px}}