/* ============================================
   Fast2 — Forum styles
   Compact threaded layout, inline votes
   ============================================ */

/* ── Page layout ── */
.forum-page {
    padding: var(--sp-2xl) 0 var(--sp-3xl);
    min-height: 60vh;
}

/* ── Header ── */
.forum-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--sp-lg);
    margin-bottom: var(--sp-2xl);
}

.forum-header__title {
    font-family: var(--ff-display);
    font-size: var(--fs-h2);
    font-weight: var(--fw-bold);
    color: var(--c-dark);
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
    margin: 0;
}

.forum-header__subtitle {
    color: var(--c-text-light);
    margin-top: var(--sp-xs);
    font-size: var(--fs-body);
    line-height: var(--lh-relaxed);
}

/* ── Categories grid ── */
.forum-categories {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--sp-lg);
    margin-bottom: var(--sp-2xl);
}

.forum-category-card {
    background: var(--c-white);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: var(--sp-lg);
    display: flex;
    flex-direction: column;
    gap: var(--sp-md);
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.forum-category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--category-color, var(--c-primary));
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.forum-category-card:hover {
    box-shadow: var(--shadow-md);
    border-color: transparent;
    transform: translateY(-2px);
}

.forum-category-card:hover::before {
    opacity: 1;
}

.forum-category-card__icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.forum-category-card__name {
    font-family: var(--ff-display);
    font-size: var(--fs-h4);
    font-weight: var(--fw-semibold);
    color: var(--c-dark);
    margin: 0;
}

.forum-category-card__desc {
    color: var(--c-text-light);
    font-size: var(--fs-small);
    margin: 0;
    line-height: var(--lh-relaxed);
}

.forum-category-card__stats {
    display: flex;
    gap: var(--sp-lg);
    font-size: var(--fs-xs);
    color: var(--c-text-light);
    padding-top: var(--sp-md);
    border-top: 1px solid var(--c-border);
}

.forum-category-card__stats span {
    display: flex;
    align-items: center;
    gap: var(--sp-xs);
}

/* ── Section title ── */
.forum-section__title {
    font-family: var(--ff-display);
    font-size: var(--fs-h3);
    font-weight: var(--fw-semibold);
    color: var(--c-dark);
    margin-bottom: var(--sp-lg);
}

/* ── Topics list ── */
.forum-topics-list {
    display: flex;
    flex-direction: column;
    background: var(--c-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--c-border);
}

.forum-topic-row {
    display: flex;
    align-items: center;
    gap: var(--sp-md);
    padding: var(--sp-md) var(--sp-lg);
    text-decoration: none;
    color: inherit;
    transition: background var(--transition-fast);
    border-bottom: 1px solid var(--c-border);
}

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

.forum-topic-row:hover {
    background: var(--c-light);
}

.forum-topic-row__badges {
    display: flex;
    gap: var(--sp-xs);
    min-width: 24px;
}

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

.forum-topic-row__title {
    display: block;
    font-weight: var(--fw-semibold);
    font-size: var(--fs-small);
    color: var(--c-dark);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.forum-topic-row__meta {
    display: block;
    font-size: var(--fs-xs);
    color: var(--c-text-light);
    margin-top: var(--sp-2xs);
}

.forum-topic-row__category {
    font-weight: var(--fw-semibold);
}

.forum-topic-row__stats {
    display: flex;
    gap: var(--sp-md);
    font-size: var(--fs-xs);
    color: var(--c-text-light);
    white-space: nowrap;
    flex-shrink: 0;
}

.forum-topic-row__stats span {
    display: flex;
    align-items: center;
    gap: 3px;
}

/* ── Empty state ── */
.forum-empty {
    text-align: center;
    padding: var(--sp-3xl) var(--sp-lg);
    color: var(--c-text-light);
}

.forum-empty .icon {
    opacity: 0.2;
    margin-bottom: var(--sp-md);
}

.forum-empty p {
    margin-bottom: var(--sp-md);
}

/* ══════════════════════════════════════════════
   TOPIC DETAIL PAGE — Compact layout
   ══════════════════════════════════════════════ */

/* ── Topic (OP) card ── */
.forum-topic {
    background: var(--c-white);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: var(--sp-lg);
    margin-bottom: var(--sp-xl);
}

.forum-topic__badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-sm);
    margin-bottom: var(--sp-md);
}

.forum-topic__category {
    font-weight: var(--fw-semibold);
    font-size: var(--fs-small);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.forum-topic__title {
    font-family: var(--ff-display);
    font-size: var(--fs-h2);
    font-weight: var(--fw-bold);
    color: var(--c-dark);
    margin: 0 0 var(--sp-sm);
    line-height: var(--lh-tight);
}

.forum-topic__meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--sp-sm);
    font-size: var(--fs-small);
    color: var(--c-text-light);
    margin-bottom: var(--sp-md);
}

.forum-topic__author-name {
    font-weight: var(--fw-semibold);
    color: var(--c-primary);
}

.forum-topic__author-name--admin {
    color: var(--c-secondary);
}

.forum-topic__content {
    line-height: var(--lh-relaxed);
    color: var(--c-text);
    word-wrap: break-word;
    font-size: var(--fs-body);
    padding-bottom: var(--sp-md);
    border-bottom: 1px solid var(--c-border);
    margin-bottom: var(--sp-md);
}

.forum-topic__footer {
    display: flex;
    align-items: center;
}

/* ── Comments header ── */
.forum-comments {
    margin-bottom: var(--sp-xl);
}

.forum-comments__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--sp-lg);
}

.forum-comments__header h2 {
    font-family: var(--ff-display);
    font-size: var(--fs-h3);
    font-weight: var(--fw-semibold);
    color: var(--c-dark);
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
    margin: 0;
}

.forum-comments__sort {
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
    font-size: var(--fs-small);
}

.forum-comments__sort label {
    color: var(--c-text-light);
    white-space: nowrap;
}

.forum-comments__sort .form-input--sm {
    padding: var(--sp-xs) var(--sp-sm);
    font-size: var(--fs-xs);
    min-width: 130px;
}

/* ── Comment (threaded) ── */
.forum-comment {
    background: var(--c-white);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: var(--sp-md) var(--sp-lg);
    margin-bottom: var(--sp-sm);
}

.forum-comment--solution {
    border-left: 3px solid var(--c-success);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.03), transparent);
}

.forum-comment__solution {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-xs);
    background: var(--c-success);
    color: white;
    padding: 2px var(--sp-sm);
    border-radius: var(--radius-full);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    margin-bottom: var(--sp-sm);
}

.forum-comment__content {
    line-height: var(--lh-relaxed);
    color: var(--c-text);
    word-wrap: break-word;
    font-size: var(--fs-body);
    margin-bottom: var(--sp-sm);
}

.forum-comment__footer {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--sp-sm);
    font-size: var(--fs-xs);
    color: var(--c-text-light);
}

.forum-comment__author {
    font-weight: var(--fw-semibold);
    color: var(--c-primary);
}

.forum-comment__author--admin {
    color: var(--c-secondary);
}

.forum-comment__date {
    color: var(--c-text-light);
}

/* ── Toggle children ── */
.forum-comment__toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--c-primary);
    font-size: var(--fs-xs);
    display: inline-flex;
    align-items: center;
    gap: 3px;
    padding: 2px var(--sp-xs);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.forum-comment__toggle:hover {
    background: var(--c-primary-50);
}

.forum-comment__toggle .icon {
    transition: transform var(--transition-fast);
}

.forum-comment__toggle.is-collapsed .icon {
    transform: rotate(180deg);
}

/* ── Nested children ── */
.forum-comment__children {
    margin-top: var(--sp-sm);
    padding-left: var(--sp-lg);
    border-left: 2px solid var(--c-border);
}

.forum-comment__children .forum-comment {
    border: none;
    border-radius: 0;
    border-bottom: 1px solid var(--c-border);
    padding: var(--sp-sm) var(--sp-md);
    margin-bottom: 0;
}

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

/* Deep nesting — tighter padding */
.forum-comment__children .forum-comment__children {
    padding-left: var(--sp-md);
}

/* Collapsed state */
.forum-comment__children.is-collapsed {
    display: none;
}

/* ── Inline vote ── */
.forum-vote--inline {
    display: inline-flex;
    flex-direction: row;
    align-items: center;
    gap: 2px;
}

.forum-vote--inline .forum-vote__btn {
    padding: 2px 4px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--c-text-light);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.forum-vote--inline .forum-vote__btn:hover {
    background: var(--c-surface);
    color: var(--c-dark);
}

.forum-vote--inline .forum-vote__btn--up.is-active {
    color: var(--c-success);
    background: #ECFDF5;
}

.forum-vote--inline .forum-vote__btn--down.is-active {
    color: var(--c-error);
    background: #FEF2F2;
}

.forum-vote--inline .forum-vote__btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.forum-vote--inline .forum-vote__score {
    font-family: var(--ff-mono);
    font-size: var(--fs-xs);
    font-weight: var(--fw-bold);
    color: var(--c-dark);
    min-width: 16px;
    text-align: center;
}

/* ── Action buttons (reply, edit, delete, mark solution) ── */
.forum-action-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--c-text-light);
    font-size: var(--fs-xs);
    font-weight: var(--fw-medium);
    display: inline-flex;
    align-items: center;
    gap: 3px;
    padding: 2px var(--sp-sm);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.forum-action-btn:hover {
    background: var(--c-surface);
    color: var(--c-dark);
}

.forum-action-btn--solution:hover {
    background: #ECFDF5;
    color: var(--c-success);
}

.forum-action-btn--danger:hover {
    background: #FEF2F2;
    color: var(--c-error);
}

/* ── Reply form ── */
.forum-reply-form {
    padding: var(--sp-lg);
    background: var(--c-white);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
}

.forum-reply-form__title {
    font-family: var(--ff-display);
    font-size: var(--fs-h4);
    font-weight: var(--fw-semibold);
    color: var(--c-dark);
    margin-bottom: var(--sp-md);
}

.forum-reply-form__actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--sp-md);
}

/* ── Locked / Login notices ── */
.forum-locked-notice,
.forum-login-notice {
    text-align: center;
    padding: var(--sp-xl);
    margin-top: var(--sp-lg);
    background: var(--c-surface);
    border-radius: var(--radius-lg);
    color: var(--c-text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-sm);
    font-size: var(--fs-small);
}

.forum-login-notice a {
    color: var(--c-primary);
    font-weight: var(--fw-semibold);
}

/* ── New topic form ── */
.forum-new-topic {
    max-width: 700px;
    margin: 0 auto;
}

.forum-new-topic__title {
    font-family: var(--ff-display);
    font-size: var(--fs-h2);
    font-weight: var(--fw-bold);
    color: var(--c-dark);
    display: flex;
    align-items: center;
    gap: var(--sp-sm);
    margin-bottom: var(--sp-xl);
}

.forum-new-topic__form {
    background: var(--c-white);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: var(--sp-xl);
}

.forum-new-topic__actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--sp-sm);
    margin-top: var(--sp-lg);
}

/* ── Pagination ── */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-md);
    padding: var(--sp-xl) 0;
}

.pagination__link {
    color: var(--c-primary);
    text-decoration: none;
    font-weight: var(--fw-semibold);
    font-size: var(--fs-small);
    padding: var(--sp-xs) var(--sp-md);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.pagination__link:hover {
    background: var(--c-primary-50);
}

.pagination__info {
    color: var(--c-text-light);
    font-size: var(--fs-small);
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .forum-header {
        flex-direction: column;
    }

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

    .forum-topic-row {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--sp-sm);
        padding: var(--sp-md);
    }

    .forum-topic-row__stats {
        width: 100%;
        justify-content: flex-start;
        gap: var(--sp-md);
    }

    .forum-topic__title {
        font-size: var(--fs-h3);
    }

    .forum-topic__meta {
        gap: var(--sp-xs);
    }

    .forum-comments__header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--sp-sm);
    }

    .forum-comment {
        padding: var(--sp-sm) var(--sp-md);
    }

    .forum-comment__footer {
        gap: var(--sp-xs);
    }

    .forum-comment__children {
        padding-left: var(--sp-md);
    }

    .forum-new-topic__form {
        padding: var(--sp-lg);
    }
}

/* ── Utility ── */
.text-success { color: var(--c-success); }
.text-danger { color: var(--c-error); }