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(width<=768px){.details-modal-grid{grid-template-columns:1fr;gap:24px;padding:20px}.details-tabs-panel{padding:20px}.specs-grid{grid-template-columns:1fr}}.cart-overlay{z-index:1100;-webkit-backdrop-filter:blur(12px);background:#050506cc;justify-content:flex-end;animation:.2s ease-out fadeIn;display:flex;position:fixed;inset:0}.cart-drawer{background:var(--bg-secondary);border-left:1px solid var(--border-color);width:100%;max-width:400px;height:100%;box-shadow:var(--shadow-lg);flex-direction:column;animation:.3s cubic-bezier(.16,1,.3,1) slideInRight;display:flex}.cart-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:20px 24px;display:flex}.cart-title{align-items:center;gap:8px;font-size:1.1rem;font-weight:700;display:flex}.close-cart-btn{color:var(--text-secondary);cursor:pointer;transition:all var(--transition-fast);background:0 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(width<=576px){.form-grid{grid-template-columns:1fr}.form-group.full-width{grid-column:span 1}.delivery-wizard{flex-direction:column;align-items:flex-start;gap:16px;padding-left:16px}.delivery-wizard:before{width:1px;height:auto;top:5%;bottom:5%;left:28px}.delivery-wizard-step{flex-direction:row;gap:12px;width:100%}}