/**
 * Forum Page Styles
 * ==================
 */

/* =============================================
   FORUM PAGE LAYOUT
   ============================================= */

.forum-page {
    padding: var(--space-6);
    max-width: 1400px;
    margin: 0 auto;
}

/* Forum Header */
.forum-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
    margin-bottom: var(--space-8);
    padding-bottom: var(--space-6);
    border-bottom: 1px solid var(--border-subtle);
}

.forum-header-topics,
.forum-header-topic {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
}

.forum-header-content {
    flex: 1;
}

.forum-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.forum-title svg {
    color: var(--accent-primary);
}

.forum-subtitle {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.forum-back-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--bg-tertiary);
    border: none;
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
}

.forum-back-btn:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
}

.forum-breadcrumb {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.forum-breadcrumb span {
    cursor: pointer;
    font-weight: 500;
}

.forum-breadcrumb span:hover {
    text-decoration: underline;
}

/* Forum Content Layout */
.forum-content {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--space-8);
}

.forum-main {
    min-width: 0;
}

.forum-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

/* Forum Sections */
.forum-section {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
}

.forum-section-title {
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    color: var(--text-tertiary);
    margin-bottom: var(--space-4);
}

/* =============================================
   CATEGORY CARDS
   ============================================= */

.forum-categories {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.forum-category-card {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
}

.forum-category-card:hover {
    background: var(--bg-elevated);
    border-color: var(--category-color, var(--accent-primary));
    transform: translateX(4px);
}

.forum-category-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: color-mix(in srgb, var(--category-color, var(--accent-primary)) 15%, transparent);
    border-radius: var(--radius-lg);
    color: var(--category-color, var(--accent-primary));
    flex-shrink: 0;
}

.forum-category-info {
    flex: 1;
    min-width: 0;
}

.forum-category-name {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.forum-category-description {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.forum-category-meta {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-tertiary);
}

.forum-category-count {
    font-size: var(--text-sm);
    font-weight: 500;
}

/* =============================================
   RECENT TOPICS (SIDEBAR)
   ============================================= */

.forum-recent-topics {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.forum-recent-topic {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--duration-fast) var(--ease-default);
}

.forum-recent-topic:hover {
    background: var(--bg-tertiary);
}

.forum-recent-topic-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xs);
    font-weight: 600;
    flex-shrink: 0;
}

.forum-recent-topic-info {
    flex: 1;
    min-width: 0;
}

.forum-recent-topic-title {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.forum-recent-topic-meta {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

.forum-meta-separator {
    margin: 0 var(--space-1);
    opacity: 0.5;
}

/* =============================================
   FORUM STATS
   ============================================= */

.forum-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
}

.forum-stat {
    text-align: center;
    padding: var(--space-3);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.forum-stat-value {
    display: block;
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--accent-primary);
}

.forum-stat-label {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

/* =============================================
   TOPICS LIST
   ============================================= */

.forum-topics-list {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.forum-topic-row {
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--border-subtle);
    cursor: pointer;
    transition: background var(--duration-fast) var(--ease-default);
    position: relative;
}

.forum-topic-row:last-child {
    border-bottom: none;
}

.forum-topic-row:hover {
    background: var(--bg-tertiary);
}

.forum-topic-pinned {
    background: color-mix(in srgb, var(--accent-primary) 5%, transparent);
}

.forum-topic-pin {
    position: absolute;
    left: var(--space-2);
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent-primary);
}

.forum-topic-avatar {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-lg);
    background: var(--accent-soft);
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-sm);
    font-weight: 600;
    flex-shrink: 0;
}

.forum-topic-main {
    min-width: 0;
}

.forum-topic-title {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.forum-topic-meta {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.forum-topic-author {
    color: var(--text-secondary);
    font-weight: 500;
}

.forum-topic-stats {
    display: flex;
    gap: var(--space-4);
}

.forum-topic-stat {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.forum-topic-last-reply {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    min-width: 120px;
}

.forum-last-reply-by {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

.forum-last-reply-date {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

.forum-no-reply {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    font-style: italic;
}

/* Empty State */
.forum-empty {
    text-align: center;
    padding: var(--space-12);
    color: var(--text-tertiary);
}

.forum-empty svg {
    margin-bottom: var(--space-4);
    opacity: 0.5;
}

.forum-empty p {
    margin-bottom: var(--space-6);
}

/* =============================================
   TOPIC DETAIL VIEW
   ============================================= */

.forum-page-topic {
    max-width: 900px;
}

.forum-topic-detail {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.forum-topic-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-subtle);
}

.forum-topic-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 500;
    margin-bottom: var(--space-3);
}

.forum-topic-badge-pinned {
    background: var(--accent-soft);
    color: var(--accent-primary);
}

.forum-topic-detail-title {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
    line-height: 1.3;
}

.forum-topic-detail-meta {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

/* Forum Posts */
.forum-post {
    padding: var(--space-5);
    border-bottom: 1px solid var(--border-subtle);
}

.forum-post:last-child {
    border-bottom: none;
}

.forum-post-original {
    background: color-mix(in srgb, var(--accent-primary) 3%, transparent);
}

.forum-post-author {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.forum-post-avatar {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-lg);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-sm);
    font-weight: 600;
}

.forum-post-author-info {
    display: flex;
    flex-direction: column;
}

.forum-post-author-name {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.forum-post-date {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

.forum-post-content {
    font-size: var(--text-base);
    color: var(--text-primary);
    line-height: 1.7;
}

.forum-post-content strong {
    font-weight: 600;
    color: var(--accent-primary);
}

.forum-post-actions {
    margin-top: var(--space-4);
    padding-top: var(--space-3);
    border-top: 1px solid var(--border-subtle);
}

.forum-like-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--bg-tertiary);
    border: none;
    border-radius: var(--radius-full);
    color: var(--text-tertiary);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
}

.forum-like-btn:hover {
    background: var(--bg-elevated);
    color: var(--terracotta);
}

.forum-like-btn.liked {
    background: rgba(180, 83, 63, 0.1);
    color: var(--terracotta);
}

.forum-like-btn.liked svg {
    fill: var(--terracotta);
}

/* Replies Section */
.forum-replies {
    border-top: 2px solid var(--border-subtle);
}

.forum-replies-title {
    padding: var(--space-4) var(--space-5);
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    color: var(--text-tertiary);
    background: var(--bg-tertiary);
}

/* Reply Form */
.forum-reply-form {
    padding: var(--space-5);
    background: var(--bg-tertiary);
}

.forum-reply-form-title {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
}

.forum-textarea {
    width: 100%;
    padding: var(--space-4);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: var(--text-base);
    font-family: inherit;
    line-height: 1.6;
    resize: vertical;
    transition: border-color var(--duration-fast) var(--ease-default);
}

.forum-textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.forum-textarea::placeholder {
    color: var(--text-tertiary);
}

.forum-form-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: var(--space-4);
}

/* Locked Notice */
.forum-locked-notice {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-5);
    background: var(--bg-tertiary);
    color: var(--text-tertiary);
    font-size: var(--text-sm);
}

/* =============================================
   MODAL
   ============================================= */

.forum-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-default);
    padding: var(--space-4);
}

.forum-modal-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.forum-modal {
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    transform: scale(0.95) translateY(20px);
    transition: transform var(--duration-normal) var(--ease-bounce);
}

.forum-modal-overlay.visible .forum-modal {
    transform: scale(1) translateY(0);
}

.forum-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5);
    border-bottom: 1px solid var(--border-subtle);
}

.forum-modal-header h2 {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.forum-modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
}

.forum-modal-close:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
}

.forum-modal-form {
    padding: var(--space-5);
    overflow-y: auto;
    max-height: calc(90vh - 140px);
}

.forum-form-group {
    margin-bottom: var(--space-5);
}

.forum-form-group label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.forum-form-group input,
.forum-form-group select,
.forum-form-group textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: var(--text-base);
    font-family: inherit;
    transition: border-color var(--duration-fast) var(--ease-default);
}

.forum-form-group input:focus,
.forum-form-group select:focus,
.forum-form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.forum-form-group select {
    cursor: pointer;
}

.forum-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-subtle);
    margin-top: var(--space-2);
}

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

@media (max-width: 1024px) {
    .forum-content {
        grid-template-columns: 1fr;
    }

    .forum-sidebar {
        display: none;
    }
}

@media (max-width: 768px) {
    .forum-page {
        padding: var(--space-4);
    }

    .forum-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-4);
    }

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

    .forum-topic-row {
        grid-template-columns: auto 1fr;
        gap: var(--space-3);
    }

    .forum-topic-stats,
    .forum-topic-last-reply {
        display: none;
    }

    .forum-category-card {
        flex-wrap: wrap;
    }

    .forum-category-meta {
        width: 100%;
        justify-content: flex-end;
        margin-top: var(--space-2);
    }

    .forum-stats-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .forum-title {
        font-size: var(--text-xl);
    }

    .forum-category-icon {
        width: 40px;
        height: 40px;
    }

    .forum-topic-avatar {
        width: 36px;
        height: 36px;
    }

    .forum-post-avatar {
        width: 36px;
        height: 36px;
    }
}