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h3{color:#667eea;font-size:1.2rem;margin-bottom:8px}.function-card p{color:#666;font-size:.85rem;margin:0}.converter-content{background:#fff;border-radius:20px;box-shadow:0 10px 40px rgba(0,0,0,.2);margin:0 auto;max-width:600px;padding:40px}.converter-card{margin-bottom:30px}.input-group{margin-bottom:25px}.input-group label{color:#555;display:block;font-size:.95rem;font-weight:600;margin-bottom:8px}.input-group input,.input-group select{background:#fff;border:2px solid #e0e0e0;border-radius:10px;font-size:1rem;padding:12px 15px;transition:all .3s ease;width:100%}.input-group input:focus,.input-group select:focus{border-color:#667eea;box-shadow:0 0 0 3px rgba(102,126,234,.1);outline:none}.swap-button-container{margin:15px 0;text-align:center}.swap-button{background:#667eea;border:none;border-radius:25px;color:#fff;cursor:pointer;font-size:.9rem;padding:10px 20px;transition:all .3s 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