.vinegar-calculator-pro{background:#fff;border-radius:20px;box-shadow:0 10px 30px #0000001a;padding:20px;max-width:900px;margin:20px auto;font-family:Roboto,sans-serif}.vinegar-calculator-pro h2{text-align:center;margin:20px 0 10px;font-size:2rem;color:#2c3e50}.vinegar-calculator-pro .subtitle{text-align:center;color:#7f8c8d;font-size:1.1rem;margin-bottom:30px}.tabs-container{display:flex;border-bottom:2px solid #e5e7eb;margin-bottom:30px;background:#f8f9fa;border-radius:10px 10px 0 0}.tab-button{flex:1;padding:15px 20px;border:none;background:transparent;font-size:1rem;font-weight:600;color:#34495e;cursor:pointer;border-bottom:3px solid transparent}.tab-button.active{color:#10b981;border-bottom-color:#10b981;background:#fff}.tab-content{display:none}.tab-content.active{display:block;animation:fadeIn .3s ease-in}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.input-row{display:flex;flex-wrap:wrap;gap:15px;margin-bottom:20px}.input-group{flex:1;min-width:200px}.input-group label{display:block;margin-bottom:8px;color:#34495e;font-weight:600;font-size:.95rem}.input-group input{width:100%;padding:12px 15px;border:2px solid #e0e0e0;border-radius:8px;font-size:16px}.input-group input:focus{border-color:#10b981;outline:none}.presets-container{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:15px}.preset-btn{padding:8px 16px;border:1px solid #e0e0e0;background:#fff;border-radius:20px;font-size:.85rem;cursor:pointer;color:#34495e}.preset-btn.active{background:#10b981;color:#fff;border-color:#10b981}.calculate-btn{background:linear-gradient(135deg,#10b981,#059669);color:#fff;padding:16px 35px;border:none;border-radius:10px;cursor:pointer;font-size:1.1rem;font-weight:600;width:100%;margin:15px 0}.copy-btn{background:linear-gradient(135deg,#3b82f6,#1d4ed8);color:#fff;padding:12px 25px;border:none;border-radius:8px;cursor:pointer;font-size:.95rem;font-weight:600}.results-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:15px;margin-top:25px}.result-card{background:#fff;border-radius:12px;padding:20px;box-shadow:0 4px 15px #00000014;border-left:4px solid;text-align:center}.result-value{font-size:1.5rem;font-weight:700;margin-bottom:10px;color:#2c3e50}@media(max-width:768px){.vinegar-calculator-pro{padding:15px;margin:10px}.tabs-container{flex-direction:column}.input-group{flex:1 1 100%}.results-grid{grid-template-columns:1fr}}