/**
 * Feed Mode Styles
 */

.feed-page {
    max-width: 900px;
    margin: 0 auto;
}

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

.feed-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feed-header p {
    color: var(--text-secondary);
}

/* Categories */
.feed-categories {
    display: flex;
    flex-wrap: nowrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
}

/* Hide Scrollbar */
.feed-categories::-webkit-scrollbar {
    display: none;
}

.category-chip {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid transparent;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.category-chip:hover {
    background-color: var(--border-color);
}

.category-chip.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Survey Grid - TikTok Style */
.feed-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 8px;
    padding: 0 var(--spacing-md);
}

.feed-grid-item {
    position: relative;
    aspect-ratio: 9 / 16;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition-base);
    background-color: var(--bg-tertiary);
}

.feed-grid-item:hover {
    transform: scale(1.02);
}

.feed-grid-item-completed {
    opacity: 0.7;
}

.feed-grid-item-completed:hover {
    opacity: 0.85;
}

.feed-completed-badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background-color: rgba(34, 197, 94, 0.95);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 600;
    z-index: 10;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.feed-report-btn {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    z-index: 10;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.feed-grid-item:hover .feed-report-btn {
    opacity: 1;
}

.feed-report-btn:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: scale(1.1);
}

.feed-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.feed-cover-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-md);
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.4) 50%, transparent 100%);
    pointer-events: none;
}

.feed-cover-title {
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 600;
    line-height: 1.3;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.feed-cover-emojis {
    color: white;
    font-size: var(--font-size-base);
    margin-top: var(--spacing-xs);
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
    letter-spacing: 0.2rem;
}

/* Loading & Empty States */
.category-loading,
.feed-loading,
.feed-info,
.feed-empty {
    padding: var(--spacing-xl);
    text-align: center;
    color: var(--text-secondary);
    grid-column: 1 / -1;
}

.feed-empty h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

/* Responsive */
@media (max-width: 768px) {
    .feed-list {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 4px;
    }

    .feed-categories {
        justify-content: center;
    }

    .feed-cover-title {
        font-size: 0.75rem;
    }

    .feed-cover-emojis {
        font-size: 0.875rem;
        letter-spacing: 0.15rem;
    }
}

@media (min-width: 1200px) {
    .feed-list {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
}