/**
 * @file feed-styles.css
 * @brief Feed component styles extracted from inline JS (§5.4 Enhancement)
 *
 * Replaces 44 instances of element.style.cssText in feed.js with CSS classes
 * that reference design system tokens. All values use CSS custom properties
 * from design-system.css to ensure theme consistency.
 */

/* Feed container — 1 px horizontal breathing room only */
.feed-wrapper {
    width: calc(100% - 2px);
    max-width: 680px;
    margin: 0 auto;
    padding: var(--spacing-4, 16px) 1px;
}

/* Feed filter bar */
.feed-filter-bar {
    display: flex;
    gap: var(--spacing-2, 8px);
    margin-bottom: var(--spacing-4, 16px);
    padding: var(--spacing-1, 4px);
    background: var(--bg-tertiary, rgba(243, 244, 246, 1));
    border-radius: var(--radius-lg, 12px);
    overflow-x: auto;
    scrollbar-width: none; /* Firefox */
}

.feed-filter-bar::-webkit-scrollbar {
    display: none; /* Chrome, Safari */
}

.feed-filter-tab,
.feed-filter-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.5rem 0.75rem;
    border: none;
    border-radius: var(--radius-md, 8px);
    background: transparent;
    color: var(--text-secondary, #6b7280);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.18s ease;
    white-space: nowrap;
    min-width: fit-content;
}

.feed-filter-tab:hover,
.feed-filter-btn:hover {
    background: rgba(0, 0, 0, 0.03);
    color: var(--text-primary, #111827);
}

.feed-filter-tab.active,
.feed-filter-btn.active {
    background: var(--bg-primary, white);
    color: var(--color-primary, #3b82f6);
    box-shadow: var(--shadow-xs, 0 1px 2px rgba(0, 0, 0, 0.05));
}

/* Dark mode adjustments */
@media (prefers-color-scheme: dark) {
    .feed-filter-bar {
        background: var(--bg-tertiary, #1a1a2e);
        border: 1px solid var(--border-color, #2a2a3e);
    }

    .feed-filter-tab,
    .feed-filter-btn {
        color: var(--text-secondary, #a0a0b0);
    }

    .feed-filter-tab:hover,
    .feed-filter-btn:hover {
        background: var(--bg-hover, rgba(255, 255, 255, 0.05));
        color: var(--text-primary, #e0e0f0);
    }

    .feed-filter-tab.active,
    .feed-filter-btn.active {
        background: var(--bg-secondary, #252540);
        color: var(--color-primary, #818cf8);
    }
}

/* Load more button */
.feed-load-more {
    width: 100%;
    margin: var(--spacing-4, 16px) 0;
    padding: var(--spacing-3, 12px);
    background: var(--bg-primary, #0f0f1a);
    border: 1px solid var(--border-color, #2a2a3e);
    border-radius: var(--radius-lg, 12px);
    color: var(--color-primary, #6366f1);
    font-weight: var(--font-semibold, 600);
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}

.feed-load-more:hover {
    background: var(--bg-hover, #252540);
    border-color: var(--color-primary, #6366f1);
}

.feed-load-more:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Feed empty state */
.feed-empty-state {
    text-align: center;
    padding: var(--spacing-8, 32px) var(--spacing-4, 16px);
    color: var(--text-tertiary, #707080);
}

.feed-empty-state-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-3, 12px);
}

.feed-empty-state-title {
    font-size: var(--text-lg, 18px);
    font-weight: var(--font-semibold, 600);
    color: var(--text-primary, #e0e0f0);
    margin-bottom: var(--spacing-2, 8px);
}

.feed-empty-state-message {
    font-size: var(--text-sm, 14px);
    color: var(--text-secondary, #a0a0b0);
}

/* Feed loading indicator */
.feed-loading {
    display: flex;
    justify-content: center;
    padding: var(--spacing-6, 24px);
}

.feed-loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color, #2a2a3e);
    border-top-color: var(--color-primary, #6366f1);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Post card wrapper within feed */
.feed-post-item {
    margin-bottom: var(--spacing-3, 12px);
}

/* Comment section styles */
.feed-comment-section {
    border-top: 1px solid var(--border-color, #2a2a3e);
    padding: var(--spacing-3, 12px);
}

.feed-comment-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-2, 8px);
    padding: var(--spacing-2, 8px) 0;
    color: var(--text-secondary, #a0a0b0);
    font-size: var(--text-sm, 14px);
    cursor: pointer;
    border: none;
    background: transparent;
    width: 100%;
    transition: color 0.2s;
}

.feed-comment-toggle:hover {
    color: var(--color-primary, #6366f1);
}

/* Pull-to-refresh: fixed-height spinner revealed behind the list as it rubber-bands down */
.pull-to-refresh-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 52px;
    opacity: 0;
    pointer-events: none;
}
.pull-to-refresh-indicator .ptr-spinner {
    width: 26px;
    height: 26px;
    border: 2.5px solid var(--border-color, rgba(168, 85, 247, 0.25));
    border-top-color: var(--color-primary, #a855f7);
    border-radius: 50%;
    background: var(--bg-card, #fff);
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.10);
}
.pull-to-refresh-indicator .ptr-spinner.ptr-spin-active {
    animation: ptrSpin 0.7s linear infinite;
}

/* Error state within feed */
.feed-error {
    padding: var(--spacing-4, 16px);
    margin: var(--spacing-3, 12px) 0;
    background: var(--color-danger-bg, rgba(239, 68, 68, 0.1));
    border: 1px solid var(--color-danger, #ef4444);
    border-radius: var(--radius-md, 8px);
    color: var(--color-danger, #ef4444);
    font-size: var(--text-sm, 14px);
}

.feed-error-retry {
    margin-top: var(--spacing-2, 8px);
    padding: var(--spacing-2, 8px) var(--spacing-4, 16px);
    background: var(--color-danger, #ef4444);
    color: var(--color-on-danger, #ffffff);
    border: none;
    border-radius: var(--radius-md, 8px);
    cursor: pointer;
    font-size: var(--text-sm, 14px);
}