/* ============================================
   MODERN MINIMALIST MODALS & OVERLAYS - PHASE 5
   StyleHub Complete Package
   ============================================ */

/* ============================================
   MODAL OVERLAY
   ============================================ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 26, 26, 0.7);
    backdrop-filter: blur(var(--blur-sm));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--duration-normal) var(--ease-out),
                visibility var(--duration-normal) var(--ease-out);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   MODAL CONTAINER
   ============================================ */

.modal-container {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    max-width: 90vw;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: scale(0.9) translateY(20px);
    transition: transform var(--duration-normal) var(--ease-bounce);
}

.modal-overlay.active .modal-container {
    transform: scale(1) translateY(0);
}

/* ============================================
   MODAL HEADER
   ============================================ */

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-6) var(--space-8);
    border-bottom: 1px solid var(--color-gray-200);
}

.modal-title {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: var(--weight-bold);
    color: var(--color-primary-dark);
    margin: 0;
}

.modal-close {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    color: var(--color-gray-600);
    cursor: pointer;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--duration-fast) var(--ease-out);
}

.modal-close:hover {
    background: var(--color-gray-100);
    color: var(--color-primary-dark);
    transform: rotate(90deg);
}

.modal-close:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ============================================
   MODAL BODY
   ============================================ */

.modal-body {
    padding: var(--space-8);
    overflow-y: auto;
    flex: 1;
}

.modal-body::-webkit-scrollbar {
    width: 8px;
}

.modal-body::-webkit-scrollbar-track {
    background: var(--color-gray-100);
    border-radius: var(--radius-full);
}

.modal-body::-webkit-scrollbar-thumb {
    background: var(--color-gray-400);
    border-radius: var(--radius-full);
}

.modal-body::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-500);
}

/* ============================================
   MODAL FOOTER
   ============================================ */

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-3);
    padding: var(--space-6) var(--space-8);
    border-top: 1px solid var(--color-gray-200);
}

/* ============================================
   PRODUCT MODAL
   ============================================ */

.product-modal .modal-container {
    max-width: 1200px;
    width: 90vw;
}

.product-modal .modal-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    padding: var(--space-8);
}

/* Product Image Gallery */
.product-gallery {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.product-main-image {
    width: 100%;
    aspect-ratio: 4/5;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-gray-100);
}

.product-main-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slow) var(--ease-out);
}

.product-main-image:hover img {
    transform: scale(1.05);
}

.product-thumbnails {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-3);
}

.product-thumbnail {
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--duration-fast) var(--ease-out);
}

.product-thumbnail:hover {
    border-color: var(--color-gray-300);
}

.product-thumbnail.active {
    border-color: var(--color-accent);
}

.product-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Product Details */
.product-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.product-details h2 {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: var(--weight-bold);
    color: var(--color-primary-dark);
    margin: 0;
}

.product-price {
    font-size: var(--text-2xl);
    font-weight: var(--weight-bold);
    color: var(--color-accent);
}

.product-description {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--color-gray-700);
}

.product-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.product-option-group h3 {
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    color: var(--color-gray-700);
    margin: 0 0 var(--space-2) 0;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.product-option-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.product-option-btn {
    padding: var(--space-2) var(--space-4);
    border: 2px solid var(--color-gray-300);
    background: var(--color-white);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    transition: all var(--duration-fast) var(--ease-out);
}

.product-option-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.product-option-btn.active {
    border-color: var(--color-accent);
    background: var(--color-accent);
    color: var(--color-white);
}

.product-option-btn.disabled {
    opacity: 0.3;
    cursor: not-allowed;
    text-decoration: line-through;
}

.product-actions {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-4);
}

.product-actions .btn {
    flex: 1;
    padding: var(--space-4);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-weight: var(--weight-semibold);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}

.product-actions .btn-primary {
    background: var(--color-accent);
    color: var(--color-white);
}

.product-actions .btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.product-actions .btn-secondary {
    background: var(--color-gray-100);
    color: var(--color-primary-dark);
}

.product-actions .btn-secondary:hover {
    background: var(--color-gray-200);
}

/* ============================================
   LOGIN/REGISTER MODAL
   ============================================ */

.auth-modal .modal-container {
    max-width: 480px;
    width: 90vw;
}

.auth-tabs {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
}

.auth-tab {
    flex: 1;
    padding: var(--space-3);
    border: none;
    background: transparent;
    font-size: var(--text-base);
    font-weight: var(--weight-semibold);
    color: var(--color-gray-600);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--duration-fast) var(--ease-out);
}

.auth-tab:hover {
    color: var(--color-accent);
}

.auth-tab.active {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-group label {
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--color-gray-700);
}

.form-group input {
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    transition: all var(--duration-fast) var(--ease-out);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-group .error {
    font-size: var(--text-sm);
    color: var(--color-error);
}

.form-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin-top: var(--space-2);
}

.form-actions .btn {
    width: 100%;
    padding: var(--space-4);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-weight: var(--weight-semibold);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}

.form-actions .btn-primary {
    background: var(--color-accent);
    color: var(--color-white);
}

.form-actions .btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ============================================
   CHECKOUT MODAL
   ============================================ */

.checkout-modal .modal-container {
    max-width: 900px;
    width: 90vw;
}

.checkout-steps {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-8);
    position: relative;
}

.checkout-steps::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-gray-200);
    z-index: 0;
}

.checkout-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    position: relative;
    z-index: 1;
}

.checkout-step-number {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--color-gray-200);
    color: var(--color-gray-600);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--weight-bold);
    transition: all var(--duration-fast) var(--ease-out);
}

.checkout-step.active .checkout-step-number {
    background: var(--color-accent);
    color: var(--color-white);
}

.checkout-step.completed .checkout-step-number {
    background: var(--color-success);
    color: var(--color-white);
}

.checkout-step-label {
    font-size: var(--text-sm);
    color: var(--color-gray-600);
    font-weight: var(--weight-medium);
}

.checkout-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-8);
}

.checkout-main {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.checkout-section {
    padding: var(--space-6);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
}

.checkout-section h3 {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    color: var(--color-primary-dark);
    margin: 0 0 var(--space-4) 0;
}

.checkout-sidebar {
    position: sticky;
    top: var(--space-4);
    height: fit-content;
}

.order-summary {
    padding: var(--space-6);
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
}

.order-summary h3 {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    color: var(--color-primary-dark);
    margin: 0 0 var(--space-4) 0;
}

.order-items {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.order-item {
    display: flex;
    gap: var(--space-3);
}

.order-item-image {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.order-item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.order-item-details {
    flex: 1;
}

.order-item-name {
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--color-primary-dark);
}

.order-item-options {
    font-size: var(--text-xs);
    color: var(--color-gray-600);
}

.order-item-price {
    font-size: var(--text-sm);
    font-weight: var(--weight-bold);
    color: var(--color-primary-dark);
}

.order-totals {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding-top: var(--space-4);
    border-top: 2px solid var(--color-gray-200);
}

.order-total-row {
    display: flex;
    justify-content: space-between;
    font-size: var(--text-sm);
}

.order-total-row.total {
    font-size: var(--text-lg);
    font-weight: var(--weight-bold);
    color: var(--color-primary-dark);
    padding-top: var(--space-2);
    border-top: 2px solid var(--color-gray-300);
    margin-top: var(--space-2);
}

/* ============================================
   CART SLIDE-OUT PANEL
   ============================================ */

.cart-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 400px;
    max-width: 90vw;
    height: 100%;
    background: var(--color-white);
    box-shadow: var(--shadow-2xl);
    z-index: var(--z-modal);
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform var(--duration-normal) var(--ease-out);
}

.cart-panel.active {
    transform: translateX(0);
}

.cart-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-6);
    border-bottom: 2px solid var(--color-gray-200);
}

.cart-panel-title {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    color: var(--color-primary-dark);
    margin: 0;
}

.cart-panel-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-6);
}

.cart-panel-footer {
    padding: var(--space-6);
    border-top: 2px solid var(--color-gray-200);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    color: var(--color-primary-dark);
    margin-bottom: var(--space-4);
}

.cart-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.cart-actions .btn {
    width: 100%;
    padding: var(--space-4);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-weight: var(--weight-semibold);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}

.cart-actions .btn-primary {
    background: var(--color-accent);
    color: var(--color-white);
}

.cart-actions .btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 992px) {
    .product-modal .modal-body {
        grid-template-columns: 1fr;
    }
    
    .checkout-content {
        grid-template-columns: 1fr;
    }
    
    .checkout-sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .modal-container {
        max-width: 95vw;
        max-height: 95vh;
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: var(--space-4);
    }
    
    .modal-title {
        font-size: var(--text-xl);
    }
    
    .cart-panel {
        width: 100vw;
        max-width: 100vw;
    }
    
    .checkout-steps {
        overflow-x: auto;
    }
    
    .product-thumbnails {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    .modal-overlay,
    .modal-container,
    .cart-panel,
    .modal-close,
    .product-main-image img,
    .product-option-btn,
    .btn {
        transition: none;
    }
}

/* Focus visible styles */
.modal-overlay:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}