/*
 * =============================================================================
 * FILE: wwwroot/css/browse.css
 * PURPOSE: Styles for the stock image browsing system
 * =============================================================================
 * 
 * COLOR SCHEME (as specified):
 * - Primary Red: #E32222
 * - Dark Red: #B71C1C  
 * - Light Red: #FF5252
 * - Black: #000000
 * - Dark Gray: #1A1A1A
 * - Medium Gray: #666666
 * - Light Gray: #F5F5F5
 * - White: #FFFFFF
 * 
 * =============================================================================
 */

/* =============================================================================
   CSS CUSTOM PROPERTIES (Variables)
   ============================================================================= */

:root {
    /* Color Palette */
    --ss-red: #E32222;
    --ss-red-dark: #B71C1C;
    --ss-red-light: #FF5252;
    --ss-black: #000000;
    --ss-gray-dark: #1A1A1A;
    --ss-gray-medium: #666666;
    --ss-gray-light: #F5F5F5;
    --ss-white: #FFFFFF;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.16);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Container Max Width */
    --container-max: 1400px;
}

/* =============================================================================
   LAYOUT COMPONENTS
   ============================================================================= */

/* Container */
.browse-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Section Spacing */
.browse-section {
    padding: var(--spacing-xl) 0;
}

/* =============================================================================
   HERO SECTION
   ============================================================================= */

.hero-section {
    position: relative;
    min-height: 320px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-md);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    overflow: hidden;
}

/* Dark overlay for better text readability */
.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.5) 0%,
        rgba(0, 0, 0, 0.4) 100%
    );
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--ss-white);
    margin: 0 0 var(--spacing-sm);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin: 0 0 var(--spacing-lg);
    line-height: 1.5;
}

/* =============================================================================
   SEARCH BAR
   ============================================================================= */

.search-container {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.search-form {
    display: flex;
    align-items: center;
    background: var(--ss-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.search-input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    font-size: 1rem;
    outline: none;
    background: transparent;
}

.search-input::placeholder {
    color: var(--ss-gray-medium);
}

.search-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--ss-red);
    color: var(--ss-white);
    border: none;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.search-btn:hover {
    background: var(--ss-red-dark);
}

.search-btn svg {
    width: 20px;
    height: 20px;
}

/* =============================================================================
   BREADCRUMB NAVIGATION
   ============================================================================= */

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) 0;
    font-size: 0.875rem;
    color: var(--ss-gray-medium);
}

.breadcrumb a {
    color: var(--ss-gray-medium);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb a:hover {
    color: var(--ss-red);
}

.breadcrumb-separator {
    color: var(--ss-gray-medium);
}

.breadcrumb-current {
    color: var(--ss-gray-dark);
    font-weight: 500;
}

/* =============================================================================
   CATEGORY GRID (Categories & SubCategories Pages)
   ============================================================================= */

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--ss-gray-dark);
    margin: 0 0 var(--spacing-xs);
}

.section-description {
    font-size: 1rem;
    color: var(--ss-gray-medium);
    margin: 0;
}

/* Category Grid */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

/* Category Card */
.category-card {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    text-decoration: none;
    display: block;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.category-card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.category-card:hover .category-card-image {
    transform: scale(1.05);
}

/* Gradient overlay on card */
.category-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60%;
    background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.7) 0%,
        rgba(0, 0, 0, 0) 100%
    );
    pointer-events: none;
}

.category-card-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-md);
    z-index: 1;
}

.category-card-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--ss-white);
    margin: 0 0 var(--spacing-xs);
}

.category-card-count {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
}

/* =============================================================================
   IMAGE GRID (Masonry-style for Search/Images Page)
   ============================================================================= */

/* Search Results Header */
.results-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--ss-gray-light);
    margin-bottom: var(--spacing-lg);
}

.results-info {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-md);
}

.results-count {
    font-size: 0.9375rem;
    color: var(--ss-gray-dark);
}

.results-count strong {
    font-weight: 600;
}

/* Suggestions/Related Tags */
.suggestions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-xs);
}

.suggestions-label {
    font-size: 0.875rem;
    color: var(--ss-gray-medium);
}

.suggestion-tag {
    font-size: 0.8125rem;
    color: var(--ss-gray-dark);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.suggestion-tag:hover {
    color: var(--ss-red);
    text-decoration: underline;
}

/* Sort Dropdown */
.sort-control {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.sort-label {
    font-size: 0.875rem;
    color: var(--ss-gray-medium);
}

.sort-select {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid #ddd;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--ss-gray-dark);
    background: var(--ss-white);
    cursor: pointer;
    outline: none;
    min-width: 140px;
}

.sort-select:focus {
    border-color: var(--ss-red);
}

/* Masonry Grid */
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
    align-items: start;
}

/* For true masonry effect with varying heights */
@supports (grid-template-rows: masonry) {
    .image-grid {
        grid-template-rows: masonry;
    }
}

/* Image Card */
.image-card {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--ss-gray-light);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    cursor: pointer;
}

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

.image-card-img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-normal);
}

.image-card:hover .image-card-img {
    transform: scale(1.02);
}

/* Image overlay on hover */
.image-card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: opacity var(--transition-normal);
    display: flex;
    align-items: flex-end;
    padding: var(--spacing-sm);
}

.image-card:hover .image-card-overlay {
    opacity: 1;
}

.image-card-caption {
    font-size: 0.8125rem;
    color: var(--ss-white);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Image Tags */
.image-card-tags {
    position: absolute;
    top: var(--spacing-xs);
    left: var(--spacing-xs);
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.image-card:hover .image-card-tags {
    opacity: 1;
}

.image-tag {
    font-size: 0.6875rem;
    padding: 2px 6px;
    background: rgba(0, 0, 0, 0.6);
    color: var(--ss-white);
    border-radius: var(--radius-sm);
}

/* =============================================================================
   PAGINATION
   ============================================================================= */

.pagination-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-xl) 0;
}

.pagination-info {
    font-size: 0.875rem;
    color: var(--ss-gray-medium);
}

.pagination {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.pagination-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--spacing-sm);
    border: 1px solid #ddd;
    border-radius: var(--radius-sm);
    background: var(--ss-white);
    color: var(--ss-gray-dark);
    font-size: 0.875rem;
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.pagination-btn:hover:not(.pagination-btn--disabled):not(.pagination-btn--active) {
    border-color: var(--ss-red);
    color: var(--ss-red);
}

.pagination-btn--active {
    background: var(--ss-red);
    border-color: var(--ss-red);
    color: var(--ss-white);
}

.pagination-btn--disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-ellipsis {
    color: var(--ss-gray-medium);
    padding: 0 var(--spacing-xs);
}

/* =============================================================================
   EMPTY STATE
   ============================================================================= */

.empty-state {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    color: var(--ss-gray-medium);
}

.empty-state-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--ss-gray-dark);
    margin: 0 0 var(--spacing-xs);
}

.empty-state-text {
    font-size: 1rem;
    color: var(--ss-gray-medium);
    margin: 0 0 var(--spacing-md);
}

.empty-state-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--ss-red);
    color: var(--ss-white);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 500;
    transition: background var(--transition-fast);
}

.empty-state-btn:hover {
    background: var(--ss-red-dark);
}

/* =============================================================================
   LOADING STATE
   ============================================================================= */

.loading-skeleton {
    background: linear-gradient(
        90deg,
        var(--ss-gray-light) 25%,
        #e8e8e8 50%,
        var(--ss-gray-light) 75%
    );
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    border-radius: var(--radius-md);
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

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

/* Tablets */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2rem;
    }

    .category-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }

    .image-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
}

/* Mobile */
@media (max-width: 768px) {
    .hero-section {
        min-height: 280px;
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .search-form {
        flex-direction: column;
    }

    .search-input {
        width: 100%;
        text-align: center;
    }

    .search-btn {
        width: 100%;
        justify-content: center;
    }

    .category-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

    .image-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

    .results-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .sort-control {
        width: 100%;
        justify-content: space-between;
    }

    .pagination-btn {
        min-width: 36px;
        height: 36px;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .image-grid {
        grid-template-columns: 1fr;
    }

    .category-card-name {
        font-size: 0.875rem;
    }
}