/* =============================================
   forum.css — 论坛页专属样式
   依赖 style.css 的 CSS 变量与基础组件
   ============================================= */

/* =============================================
   布局：覆盖首页 content-area 的 grid 逻辑
   ============================================= */
.forum-layout {
  /* main-container 已提供 padding-top + flex 布局 */
  gap: 20px;
  align-items: flex-start;
}

/* 侧边栏 */
.forum-sidebar {
  width: 220px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  position: sticky;
  top: calc(var(--navbar-height) + 16px);
  max-height: calc(100vh - var(--navbar-height) - 32px);
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: none;
}
.forum-sidebar::-webkit-scrollbar { display: none; }

/* 主内容区 */
.forum-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* =============================================
   社区统计 2×2 网格
   ============================================= */
.forum-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.forum-stat-item {
  background: var(--bg);
  border-radius: 10px;
  padding: 10px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  border: 1px solid var(--border);
  transition: border-color .15s;
}
.forum-stat-item:hover { border-color: var(--accent); }

.forum-stat-num {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}

.forum-stat-label {
  font-size: .7rem;
  color: var(--text-muted);
}

.forum-stat-online .forum-stat-num { color: #22c55e; }

/* =============================================
   论坛 Banner
   ============================================= */
.forum-banner {
  background: linear-gradient(135deg, #5b6af0 0%, #8b5cf6 60%, #a855f7 100%);
  border-radius: 14px;
  padding: 24px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: #fff;
}

.forum-banner-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.forum-banner-icon {
  width: 52px;
  height: 52px;
  background: rgba(255,255,255,.15);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.forum-banner-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 4px;
  letter-spacing: -.02em;
}

.forum-banner-sub {
  font-size: .88rem;
  opacity: .85;
}

.forum-post-btn {
  background: rgba(255,255,255,.2);
  color: #fff;
  border: 1.5px solid rgba(255,255,255,.4);
  border-radius: 10px;
  padding: 10px 20px;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 7px;
  transition: background .15s, transform .15s;
  flex-shrink: 0;
  white-space: nowrap;
}
.forum-post-btn:hover {
  background: rgba(255,255,255,.3);
  transform: translateY(-1px);
}

/* =============================================
   筛选工具栏
   ============================================= */
.forum-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 16px;
}

.forum-filter-tabs {
  display: flex;
  gap: 4px;
}

.forum-filter-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 6px 14px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: .85rem;
  cursor: pointer;
  transition: background .15s, color .15s;
}
.forum-filter-btn:hover { background: var(--bg-hover); color: var(--text); }
.forum-filter-btn.active {
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 600;
}

.forum-sort-select {
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: .85rem;
  cursor: pointer;
  outline: none;
}
.forum-sort-select:focus { border-color: var(--accent); }

/* =============================================
   话题列表
   ============================================= */
.forum-topics {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* 话题卡片 */
.topic-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  cursor: pointer;
  transition: border-color .18s, box-shadow .18s, transform .15s;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.topic-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.topic-card.pinned {
  border-left: 3px solid #f59e0b;
  background: linear-gradient(to right, var(--sponsor-light) 0%, var(--bg-secondary) 120px);
}
.topic-card.hot {
  border-left: 3px solid #ef4444;
}

/* 头像 */
.topic-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
  background: linear-gradient(135deg, #5b6af0, #a855f7);
}

/* 右侧内容 */
.topic-body { flex: 1; min-width: 0; }

.topic-top {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.topic-title {
  font-size: .97rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  flex: 1;
  min-width: 0;
}
.topic-card:hover .topic-title { color: var(--accent); }

/* 徽章 */
.topic-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 7px;
  border-radius: 5px;
  font-size: .72rem;
  font-weight: 600;
  flex-shrink: 0;
  white-space: nowrap;
}
.topic-badge-pin  { background: #fef3c7; color: #92400e; }
.topic-badge-hot  { background: #fee2e2; color: #991b1b; }
.topic-badge-cat  { background: var(--accent-light); color: var(--accent); }
[data-theme="dark"] .topic-badge-pin { background: #451a03; color: #fbbf24; }
[data-theme="dark"] .topic-badge-hot { background: #450a0a; color: #fca5a5; }

/* 预览文本 */
.topic-preview {
  font-size: .84rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 底部信息行 */
.topic-footer {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.topic-author-info {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: .8rem;
  color: var(--text-secondary);
}
.topic-author-name {
  font-weight: 600;
  color: var(--text);
}

.topic-meta-sep { color: var(--border); font-size: .7rem; }

.topic-time {
  font-size: .78rem;
  color: var(--text-muted);
}

.topic-stats-row {
  display: flex;
  gap: 12px;
  margin-left: auto;
}
.topic-stat {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: .8rem;
  color: var(--text-muted);
}
.topic-stat i { font-size: .8rem; }

/* 标签行 */
.topic-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.topic-tag {
  padding: 2px 9px;
  background: var(--bg-hover);
  border-radius: 12px;
  font-size: .75rem;
  color: var(--text-secondary);
}

/* =============================================
   分页
   ============================================= */
.forum-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  padding: 24px 0 8px;
}

.page-btn {
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: .88rem;
  cursor: pointer;
  transition: all .15s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-light); }
.page-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: 700; }
.page-btn:disabled { opacity: .4; cursor: not-allowed; }

/* =============================================
   弹窗（论坛专用，避免与 style.css 冲突）
   ============================================= */
.forum-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  align-items: center;
  justify-content: center;
}
.forum-modal.open { display: flex; }

.forum-modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.5);
  backdrop-filter: blur(4px);
}

.forum-modal-box {
  position: relative;
  background: var(--bg-secondary);
  border-radius: 16px;
  width: 90%;
  max-width: 580px;
  max-height: 90vh;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  animation: modalIn .2s ease;
}
.forum-modal-lg .forum-modal-box { max-width: 820px; }

@keyframes modalIn {
  from { opacity: 0; transform: translateY(20px) scale(.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.forum-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.forum-modal-header h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}

.forum-modal-close {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: .9rem;
  transition: background .15s, color .15s;
}
.forum-modal-close:hover { background: var(--bg-hover); color: var(--text); }

.forum-modal-body {
  padding: 20px 24px;
  overflow-y: auto;
  flex: 1;
}

.forum-modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 14px 24px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

/* =============================================
   发帖表单
   ============================================= */
.form-field {
  margin-bottom: 16px;
}
.form-field label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 10px 14px;
  border-radius: 9px;
  border: 1.5px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: .9rem;
  font-family: inherit;
  transition: border-color .15s, box-shadow .15s;
  outline: none;
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}
.form-field textarea {
  resize: vertical;
  min-height: 110px;
  line-height: 1.6;
}

/* =============================================
   按钮
   ============================================= */
.forum-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: 9px;
  font-size: .88rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all .15s;
}
.forum-btn-primary { background: var(--accent); color: #fff; }
.forum-btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.forum-btn-ghost { background: var(--bg-hover); color: var(--text-secondary); }
.forum-btn-ghost:hover { background: var(--border); color: var(--text); }

/* =============================================
   话题详情（弹窗内）
   ============================================= */
.detail-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.45;
  margin-bottom: 12px;
}
.detail-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: .82rem;
  color: var(--text-muted);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.detail-meta strong { color: var(--text); }

.detail-body {
  font-size: .9rem;
  line-height: 1.8;
  color: var(--text);
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.detail-body p { margin-bottom: 12px; }

/* 回复列表 */
.reply-section-title {
  font-size: .92rem;
  font-weight: 700;
  color: var(--text);
  margin: 20px 0 12px;
  display: flex;
  align-items: center;
  gap: 7px;
}
.reply-section-title i { color: var(--accent); }

.reply-item {
  display: flex;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.reply-item:last-child { border-bottom: none; }

.reply-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #5b6af0, #a855f7);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: .85rem;
  flex-shrink: 0;
}

.reply-content { flex: 1; min-width: 0; }
.reply-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}
.reply-author { font-size: .85rem; font-weight: 700; color: var(--text); }
.reply-time   { font-size: .75rem; color: var(--text-muted); }
.reply-text   { font-size: .85rem; color: var(--text-secondary); line-height: 1.6; }

.reply-actions {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}
.reply-action {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: .78rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: color .15s;
}
.reply-action:hover { color: var(--accent); }

/* 回复输入 */
.reply-input-wrap {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.reply-input-wrap label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  display: block;
}

/* =============================================
   侧边栏分类（论坛专用）
   ============================================= */
.forum-cat-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: 9px;
  cursor: pointer;
  transition: background .15s;
}
.forum-cat-item:hover { background: var(--bg-hover); }
.forum-cat-item.active { background: var(--accent-light); }

.forum-cat-icon {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .9rem;
  flex-shrink: 0;
}

.forum-cat-body { flex: 1; min-width: 0; }
.forum-cat-name {
  font-size: .88rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.forum-cat-item.active .forum-cat-name { color: var(--accent); }

.forum-cat-count {
  font-size: .72rem;
  color: var(--text-muted);
  background: var(--bg-hover);
  padding: 1px 7px;
  border-radius: 10px;
  flex-shrink: 0;
}
.forum-cat-item.active .forum-cat-count {
  background: var(--accent);
  color: #fff;
}

/* =============================================
   标签云
   ============================================= */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 6px; }
.tag-cloud-item {
  padding: 4px 11px;
  background: var(--bg-hover);
  border-radius: 14px;
  font-size: .78rem;
  color: var(--text-secondary);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all .15s;
}
.tag-cloud-item:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

/* =============================================
   页脚
   ============================================= */
.forum-footer {
  margin-top: 24px;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
  padding: 36px 24px;
}
.forum-footer-inner {
  max-width: 1400px;
  margin: 0 auto;
}
.forum-footer-brand {
  margin-bottom: 14px;
  color: var(--text);
}
.forum-footer-brand p {
  font-size: .85rem;
  color: var(--text-muted);
  margin-top: 6px;
}
.forum-footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.forum-footer-links a {
  font-size: .85rem;
  color: var(--text-muted);
  transition: color .15s;
}
.forum-footer-links a:hover { color: var(--accent); }
.forum-footer-copy {
  font-size: .8rem;
  color: var(--text-muted);
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

/* =============================================
   响应式
   ============================================= */
@media (max-width: 960px) {
  .forum-sidebar {
    display: none;
  }
  .forum-content { width: 100%; }
  .forum-layout { padding-left: 16px; padding-right: 16px; }
}

@media (max-width: 600px) {
  .forum-banner {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding: 18px;
  }
  .forum-banner-title { font-size: 1.2rem; }
  .forum-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .forum-filter-tabs { overflow-x: auto; padding-bottom: 2px; }
  .topic-card { padding: 12px 14px; }
  .topic-stats-row { display: none; }
}