/* Design Library Page — Apple-inspired Minimal Design
   Uses design tokens from modern-style.css */

/* ====== Page Layout ====== */
.design-library-page {
    min-height: 100vh;
    background: var(--bg-body);
    padding-bottom: 100px;
}

/* ====== Page Header ====== */
.page-header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-2xl);
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 100%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.header-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.page-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin: 0;
    font-size: 2rem;
    font-weight: 700;
    color: white;
    letter-spacing: -0.02em;
}

.title-icon {
    font-size: 2.5rem;
}

.page-subtitle {
    margin: var(--spacing-md) 0 0;
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.85);
    font-weight: 400;
    letter-spacing: 0.01em;
}

/* ====== Search Section ====== */
.search-section {
    padding: var(--spacing-lg);
    background: var(--bg-surface);
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.search-container {
    max-width: 600px;
    margin: 0 auto;
}

.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-body);
    border-radius: 12px;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 1px solid #e5e7eb;
    transition: all var(--transition-normal);
}

.search-input-wrapper:focus-within {
    border-color: var(--primary);
    background: var(--bg-surface);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.12);
}

.search-icon {
    color: var(--text-muted);
    margin-right: var(--spacing-sm);
    font-size: 1.1rem;
    transition: color var(--transition-normal);
}

.search-input-wrapper:focus-within .search-icon {
    color: var(--primary);
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    background: none;
    font-size: 1rem;
    color: var(--text-primary);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-clear {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: 50%;
    transition: all var(--transition-normal);
}

.search-clear:hover {
    background: rgba(0, 0, 0, 0.04);
    color: var(--danger);
}

/* ====== Category Navigation ====== */
.category-nav {
    background: var(--bg-surface);
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.category-nav::-webkit-scrollbar {
    display: none;
}

.category-scroll {
    display: flex;
    gap: var(--spacing-sm);
    min-width: max-content;
}

.category-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--bg-body);
    border-radius: 20px;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
    border: 1px solid transparent;
}

.category-item:hover {
    background: rgba(102, 126, 234, 0.06);
    color: var(--primary);
}

.category-item.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 2px 10px rgba(102, 126, 234, 0.25);
}

.category-label {
    font-weight: 500;
    font-size: 0.9rem;
}

.category-count {
    background: rgba(0, 0, 0, 0.06);
    padding: 2px 8px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
}

.category-item.active .category-count {
    background: rgba(255, 255, 255, 0.3);
}

/* ====== Design Grid Container ====== */
.design-grid-container {
    padding: var(--spacing-lg);
    min-height: 400px;
}

/* ====== Loading State ====== */
.loading-state {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
}

.loading-content {
    text-align: center;
}

.loading-dots {
    display: flex;
    gap: 8px;
    margin-bottom: var(--spacing-lg);
    justify-content: center;
}

.loading-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
    animation: fadeIn 1.5s ease-in-out infinite;
}

.loading-dots span:nth-child(1) { animation-delay: 0s; }
.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.loading-dots span:nth-child(3) { animation-delay: 0.4s; }

.loading-text {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0;
}

/* ====== Design Grid ====== */
.design-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

/* ====== Design Card ====== */
.design-card {
    background: var(--bg-surface);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-xs);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
    cursor: pointer;
    position: relative;
}

.design-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.design-preview {
    height: 200px;
    background: var(--bg-body);
    position: relative;
    overflow: hidden;
}

.design-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-smooth);
}

.design-card:hover .design-preview img {
    transform: scale(1.03);
}

.design-info {
    padding: var(--spacing-lg);
}

.design-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-sm);
    line-height: 1.4;
    letter-spacing: -0.01em;
}

.design-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.design-category {
    background: var(--bg-body);
    color: var(--text-secondary);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
}

.design-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-muted);
    font-size: 0.8rem;
}

.design-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.design-btn {
    flex: 1;
    padding: 10px var(--spacing-md);
    border: none;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-preview {
    background: var(--bg-body);
    color: var(--text-secondary);
    border: 1px solid rgba(0, 0, 0, 0.06);
}

.btn-preview:hover {
    background: rgba(0, 0, 0, 0.04);
    color: var(--text-primary);
}

.btn-use {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
}

.btn-use:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(102, 126, 234, 0.25);
}

/* ====== Empty State ====== */
.empty-state {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}

.empty-content {
    text-align: center;
    max-width: 300px;
}

.empty-icon {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
}

.empty-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 0 var(--spacing-sm);
}

.empty-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}

/* ====== Floating Actions ====== */
.floating-actions {
    position: fixed;
    bottom: 90px;
    right: var(--spacing-lg);
    z-index: 1000;
}

.fab {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.fab:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.fab:active {
    transform: scale(0.95);
}

/* ====== Design Preview Modal ====== */
.design-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.design-modal.active {
    display: flex;
    opacity: 1;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal-container {
    background: var(--bg-surface);
    border-radius: 20px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    position: relative;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    transform: scale(0.95);
    transition: transform var(--transition-smooth);
}

.design-modal.active .modal-container {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    background: var(--bg-body);
}

.modal-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.01em;
}

.modal-close {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: rgba(0, 0, 0, 0.04);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-lg);
    max-height: 60vh;
    overflow-y: auto;
}

/* ====== Animations ====== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(16px) scale(0.97);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ====== Responsive: 768px ====== */
@media (max-width: 768px) {
    .page-title {
        font-size: 1.5rem;
    }

    .title-icon {
        font-size: 2rem;
    }

    .design-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: var(--spacing-md);
    }

    .floating-actions {
        bottom: 80px;
        right: var(--spacing-md);
    }

    .fab {
        width: 48px;
        height: 48px;
        font-size: 1rem;
    }
}

/* ====== Responsive: 480px ====== */
@media (max-width: 480px) {
    .design-grid {
        grid-template-columns: 1fr;
    }

    .search-section {
        padding: var(--spacing-md);
    }

    .category-nav {
        padding: var(--spacing-md);
    }

    .design-grid-container {
        padding: var(--spacing-md);
    }

    .page-header {
        padding: var(--spacing-lg) var(--spacing-md) var(--spacing-xl);
    }

    .modal-container {
        width: 95%;
        border-radius: var(--radius-lg);
    }
}

/* ====== Responsive: 400px ====== */
@media (max-width: 400px) {
    .design-card {
        border-radius: var(--radius-md);
    }

    .design-info {
        padding: var(--spacing-md);
    }

    .design-btn {
        padding: 8px var(--spacing-sm);
        font-size: 0.85rem;
    }
}

/* ====== Dark Mode ====== */
@media (prefers-color-scheme: dark) {
    .design-library-page {
        background: #0a0a0f;
    }

    .page-header {
        background: linear-gradient(135deg, #4a5acd, #5a3d80);
    }

    .search-section,
    .category-nav {
        background: #111118;
        border-bottom-color: rgba(255, 255, 255, 0.04);
    }

    .search-input-wrapper {
        background: rgba(255, 255, 255, 0.04);
        border-color: rgba(255, 255, 255, 0.08);
    }

    .search-input-wrapper:focus-within {
        border-color: var(--primary);
        background: rgba(255, 255, 255, 0.06);
        box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
    }

    .search-input {
        color: rgba(255, 255, 255, 0.9);
    }

    .category-item {
        background: rgba(255, 255, 255, 0.04);
        color: rgba(255, 255, 255, 0.7);
    }

    .category-item:hover {
        background: rgba(102, 126, 234, 0.12);
    }

    .category-count {
        background: rgba(255, 255, 255, 0.08);
    }

    .design-card {
        background: #1a1a24;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    }

    .design-card:hover {
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    }

    .design-preview {
        background: #111118;
    }

    .design-title {
        color: rgba(255, 255, 255, 0.9);
    }

    .design-category {
        background: rgba(255, 255, 255, 0.06);
        color: rgba(255, 255, 255, 0.6);
    }

    .design-stats {
        color: rgba(255, 255, 255, 0.4);
    }

    .btn-preview {
        background: rgba(255, 255, 255, 0.04);
        color: rgba(255, 255, 255, 0.6);
        border-color: rgba(255, 255, 255, 0.08);
    }

    .btn-preview:hover {
        background: rgba(255, 255, 255, 0.08);
        color: rgba(255, 255, 255, 0.9);
    }

    .empty-icon {
        color: rgba(255, 255, 255, 0.2);
    }

    .empty-title {
        color: rgba(255, 255, 255, 0.6);
    }

    .empty-desc {
        color: rgba(255, 255, 255, 0.4);
    }

    .modal-backdrop {
        background: rgba(0, 0, 0, 0.6);
    }

    .modal-container {
        background: #1a1a24;
    }

    .modal-header {
        background: #111118;
        border-bottom-color: rgba(255, 255, 255, 0.06);
    }

    .modal-title {
        color: rgba(255, 255, 255, 0.9);
    }

    .modal-close {
        color: rgba(255, 255, 255, 0.5);
    }

    .modal-close:hover {
        background: rgba(255, 255, 255, 0.08);
        color: white;
    }

    .fab {
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
    }
}

/* ====== Performance ====== */
.design-card,
.category-item,
.fab {
    will-change: transform;
}

.design-preview img {
    will-change: transform;
}