/**
 * Instagram Social Wall - Stylesheet
 * 
 * @package Instagram_Social_Wall
 * @version 1.0.0
 */

/* ============================================
   CSS VARIABLES & THEME SYSTEM
   ============================================ */
:root {
    /* Light Theme (Default) */
    --isw-bg-primary: #ffffff;
    --isw-bg-secondary: #fafafa;
    --isw-text-primary: #262626;
    --isw-text-secondary: #8e8e8e;
    --isw-border-color: #dbdbdb;
    --isw-accent-gradient: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    --isw-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --isw-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --isw-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
    --isw-radius: 8px;
    --isw-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme */
.isw-theme-dark {
    --isw-bg-primary: #1a1a1a;
    --isw-bg-secondary: #262626;
    --isw-text-primary: #fafafa;
    --isw-text-secondary: #a8a8a8;
    --isw-border-color: #363636;
}

/* ============================================
   MAIN CONTAINER
   ============================================ */
.isw-wall {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--isw-bg-primary);
    border-radius: 12px;
    padding: 32px;
    margin: 40px auto;
    max-width: 1200px;
    box-shadow: var(--isw-shadow-md);
    color: var(--isw-text-primary);
}

/* ============================================
   HEADER BAR
   ============================================ */
.isw-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--isw-border-color);
}

.isw-profile-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.isw-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--isw-accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    box-shadow: var(--isw-shadow-sm);
}

.isw-username {
    font-size: 24px;
    font-weight: 700;
    color: var(--isw-text-primary);
    letter-spacing: -0.5px;
}

.isw-follow-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--isw-accent-gradient);
    color: #ffffff !important;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 600;
    font-size: 14px;
    transition: var(--isw-transition);
    box-shadow: var(--isw-shadow-sm);
}

.isw-follow-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--isw-shadow-md);
    opacity: 0.95;
}

/* ============================================
   POSTS GRID CONTAINER
   ============================================ */
.isw-posts-container {
    display: grid;
    gap: 16px;
    /* Columns set via inline style or data attribute */
}

/* Dynamic columns based on data attribute */
.isw-wall[data-columns="2"] .isw-posts-container {
    grid-template-columns: repeat(2, 1fr);
}

.isw-wall[data-columns="3"] .isw-posts-container {
    grid-template-columns: repeat(3, 1fr);
}

.isw-wall[data-columns="4"] .isw-posts-container {
    grid-template-columns: repeat(4, 1fr);
}

.isw-wall[data-columns="5"] .isw-posts-container {
    grid-template-columns: repeat(5, 1fr);
}

.isw-wall[data-columns="6"] .isw-posts-container {
    grid-template-columns: repeat(6, 1fr);
}

/* ============================================
   INDIVIDUAL POST CARD
   ============================================ */
.isw-post {
    position: relative;
    display: flex;
    flex-direction: column;
    border-radius: var(--isw-radius);
    overflow: hidden;
    background: var(--isw-bg-secondary);
    transition: var(--isw-transition);
}

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

/* Post Link */
.isw-post-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

/* Media Wrapper */
.isw-media-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    background: var(--isw-bg-secondary);
}

/* Post Image */
.isw-post-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.isw-post:hover .isw-post-image {
    transform: scale(1.08);
}

/* Media Type Badge */
.isw-media-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(0, 0, 0, 0.7);
    color: #ffffff;
    padding: 6px 10px;
    border-radius: 20px;
    font-size: 14px;
    z-index: 2;
    backdrop-filter: blur(8px);
}

/* ============================================
   HOVER OVERLAY
   ============================================ */
.isw-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--isw-overlay-color, rgba(0, 0, 0, 0.7));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--isw-transition);
    z-index: 1;
}

.isw-post:hover .isw-overlay {
    opacity: 1;
}

.isw-overlay-content {
    display: flex;
    gap: 24px;
    color: #ffffff;
    font-weight: 600;
    font-size: 16px;
}

.isw-stat {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.15);
    padding: 8px 16px;
    border-radius: 30px;
    backdrop-filter: blur(10px);
}

/* ============================================
   CAPTION & DATE
   ============================================ */
.isw-caption {
    padding: 12px 16px 4px;
    font-size: 14px;
    line-height: 1.5;
    color: var(--isw-text-primary);
    min-height: 3.1em;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.isw-hashtag {
    color: #00376b;
    font-weight: 600;
    cursor: pointer;
    transition: var(--isw-transition);
}

.isw-theme-dark .isw-hashtag {
    color: #e0f1ff;
}

.isw-hashtag:hover {
    text-decoration: underline;
}

.isw-date {
    display: block;
    padding: 4px 16px 12px;
    font-size: 12px;
    color: var(--isw-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ============================================
   MASONRY LAYOUT
   ============================================ */
.isw-posts-container.isw-layout-masonry {
    display: block;
    columns: 3;
    column-gap: 16px;
}

.isw-posts-container.isw-layout-masonry .isw-post {
    display: inline-block;
    width: 100%;
    break-inside: avoid;
    margin-bottom: 16px;
}

.isw-posts-container.isw-layout-masonry .isw-media-wrapper {
    aspect-ratio: auto;
    height: auto;
}

.isw-posts-container.isw-layout-masonry .isw-post-image {
    position: relative;
    width: 100%;
    height: auto;
    display: block;
}

/* ============================================
   CAROUSEL LAYOUT
   ============================================ */
.isw-posts-container.isw-layout-carousel {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 16px;
    padding-bottom: 16px;
    -webkit-overflow-scrolling: touch;
}

.isw-posts-container.isw-layout-carousel .isw-post {
    flex: 0 0 300px;
    scroll-snap-align: start;
}

/* Custom scrollbar for carousel */
.isw-posts-container.isw-layout-carousel::-webkit-scrollbar {
    height: 6px;
}

.isw-posts-container.isw-layout-carousel::-webkit-scrollbar-track {
    background: var(--isw-bg-secondary);
    border-radius: 3px;
}

.isw-posts-container.isw-layout-carousel::-webkit-scrollbar-thumb {
    background: var(--isw-border-color);
    border-radius: 3px;
}

.isw-posts-container.isw-layout-carousel::-webkit-scrollbar-thumb:hover {
    background: var(--isw-text-secondary);
}

/* ============================================
   EMPTY STATE & NO POSTS
   ============================================ */
.isw-empty,
.isw-no-posts {
    text-align: center;
    padding: 60px 20px;
    color: var(--isw-text-secondary);
}

.isw-no-posts p:first-child {
    font-size: 48px;
    margin-bottom: 16px;
}

/* ============================================
   FOOTER
   ============================================ */
.isw-footer {
    text-align: center;
    padding-top: 24px;
    margin-top: 24px;
    border-top: 1px solid var(--isw-border-color);
    font-size: 13px;
    color: var(--isw-text-secondary);
}

.isw-footer strong {
    background: var(--isw-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

/* ============================================
   LOADING ANIMATION
   ============================================ */
.isw-loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 60px;
}

.isw-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--isw-border-color);
    border-top-color: #e1306c; /* Instagram pink */
    border-radius: 50%;
    animation: isw-spin 0.8s linear infinite;
}

@keyframes isw-spin {
    to { transform: rotate(360deg); }
}

/* ============================================
   ANIMATIONS
   ============================================ */
.isw-post {
    animation: isw-fadeInUp 0.5s ease-out both;
}

/* Staggered animation for posts */
.isw-post:nth-child(1) { animation-delay: 0.05s; }
.isw-post:nth-child(2) { animation-delay: 0.1s; }
.isw-post:nth-child(3) { animation-delay: 0.15s; }
.isw-post:nth-child(4) { animation-delay: 0.2s; }
.isw-post:nth-child(5) { animation-delay: 0.25s; }
.isw-post:nth-child(6) { animation-delay: 0.3s; }
.isw-post:nth-child(7) { animation-delay: 0.35s; }
.isw-post:nth-child(8) { animation-delay: 0.4s; }
.isw-post:nth-child(9) { animation-delay: 0.45s; }
.isw-post:nth-child(10) { animation-delay: 0.5s; }
.isw-post:nth-child(11) { animation-delay: 0.55s; }
.isw-post:nth-child(12) { animation-delay: 0.6s; }

@keyframes isw-fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .isw-wall[data-columns="5"] .isw-posts-container,
    .isw-wall[data-columns="6"] .isw-posts-container {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .isw-wall {
        padding: 20px;
        margin: 20px auto;
        border-radius: 8px;
    }
    
    .isw-header-bar {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .isw-wall[data-columns="4"] .isw-posts-container,
    .isw-wall[data-columns="5"] .isw-posts-container,
    .isw-wall[data-columns="6"] .isw-posts-container {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .isw-posts-container.isw-layout-masonry {
        columns: 2;
    }
}

@media (max-width: 480px) {
    .isw-wall {
        padding: 16px;
    }
    
    .isw-wall[data-columns="3"] .isw-posts-container,
    .isw-wall[data-columns="4"] .isw-posts-container,
    .isw-wall[data-columns="5"] .isw-posts-container,
    .isw-wall[data-columns="6"] .isw-posts-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .isw-posts-container.isw-layout-masonry {
        columns: 1;
    }
    
    .isw-username {
        font-size: 20px;
    }
    
    .isw-overlay-content {
        flex-direction: column;
        gap: 12px;
    }
}

/* ============================================
   ADMIN STYLES
   ============================================ */
.isw-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 30px;
    padding: 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.isw-logo {
    font-size: 48px;
}

.isw-docs-container .postbox {
    margin: 20px 0;
}

.isw-docs-container pre {
    background: #f5f5f5;
    padding: 16px;
    border-radius: 6px;
    overflow-x: auto;
    border-left: 4px solid #e1306c;
}

.isw-docs-container code {
    font-family: 'Courier New', Courier, monospace;
    background: #f5f5f5;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 14px;
}

.isw-docs-container table.widefat {
    margin-top: 16px;
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
.isw-post:focus-within {
    outline: 3px solid #e1306c;
    outline-offset: 2px;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .isw-post,
    .isw-post-image,
    .isw-overlay,
    .isw-follow-btn {
        transition: none;
        animation: none;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .isw-wall {
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    .isw-overlay {
        display: none !important;
    }
}