/* ═══════════════════════════════════════════════════════════════
   Iter 7: 公告系统
   ═══════════════════════════════════════════════════════════════ */

.announcement-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
}

.announcement-create-btn {
  padding: 8px 20px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-family: var(--sans);
  cursor: pointer;
  transition: background 0.15s;
}

.announcement-create-btn:hover { background: var(--primary-dark); }

.announcement-item {
  background: var(--raised);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
}

.announcement-item .ai-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.announcement-item .ai-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  object-fit: cover;
  cursor: pointer;
  flex-shrink: 0;
}

.announcement-item .ai-avatar-placeholder {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--primary-surface);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  flex-shrink: 0;
}

.announcement-item .ai-title {
  flex: 1;
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
}

.announcement-item .ai-delete {
  width: 30px; height: 30px;
  border: none;
  background: none;
  color: var(--ink-faint);
  cursor: pointer;
  font-size: 1.1rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
}

.announcement-item .ai-delete:hover {
  background: oklch(from var(--accent) l c h / 0.12);
  color: var(--accent);
}

.announcement-item .ai-content {
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.7;
  white-space: pre-wrap;
  margin-top: var(--space-xs);
}

.announcement-item .ai-time {
  font-size: 0.78rem;
  color: var(--ink-faint);
  margin-top: var(--space-sm);
}

/* 公告编辑器 overlay */
.announcement-editor-overlay {
  position: fixed; inset: 0; z-index: 9999;
  background: oklch(0 0 0 / 0.4);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
}

.announcement-editor-dialog {
  background: var(--raised);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  width: 100%;
  max-width: 560px;
  max-height: 80vh;
  overflow-y: auto;
}

.announcement-editor-dialog h3 {
  font-family: var(--serif);
  font-size: 1.1rem;
  margin-bottom: var(--space-md);
}

.announcement-editor-dialog input,
.announcement-editor-dialog textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: var(--sans);
  background: var(--surface);
  color: var(--ink);
  box-sizing: border-box;
  margin-bottom: var(--space-sm);
}

.announcement-editor-dialog input:focus,
.announcement-editor-dialog textarea:focus {
  outline: none;
  border-color: var(--primary-light);
}

.announcement-editor-dialog textarea {
  resize: vertical;
  min-height: 140px;
}

.ae-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.ae-actions button {
  padding: 9px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-family: var(--sans);
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s, box-shadow 0.15s, opacity 0.15s, transform 0.15s;
}

.ae-actions .ae-publish {
  background: var(--primary);
  color: #fff;
  border: none;
}

.ae-actions .ae-publish:hover { background: var(--primary-dark); }

.ae-actions .ae-cancel {
  background: none;
  border: 1px solid var(--border);
  color: var(--ink-soft);
}

.ae-actions .ae-cancel:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.ae-error {
  font-size: 0.82rem;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

/* ═══════════════════════════════════════════════════════════════
   Iter 7: 侧边栏排行榜图标
   ═══════════════════════════════════════════════════════════════ */

.gi-nav-leaderboard {
  width: 18px;
  height: 18px;
  display: inline-flex;
  gap: 2.5px;
  align-items: flex-end;
  flex-shrink: 0;
}

.gi-nav-leaderboard::before {
  content: '';
  display: block;
  width: 4px;
  height: 18px;
  background: currentColor;
  border-radius: 1px;
}

.gi-nav-leaderboard::after {
  content: '';
  display: block;
  width: 4px;
  height: 13px;
  background: currentColor;
  border-radius: 1px;
  opacity: 0.7;
}

/* 第三个竖条通过 shadow 伪元素 */
.gi-nav-leaderboard span {
  display: block;
  width: 4px;
  height: 9px;
  background: currentColor;
  border-radius: 1px;
  opacity: 0.45;
}

@media (max-width: 640px) {
  .user-stats-row { grid-template-columns: 1fr 1fr 1fr; gap: var(--space-sm); }
  .announcement-item .ai-header { flex-wrap: wrap; }
  .lb-row { padding: 12px; gap: 10px; }
  .lb-rank-seal { width: 30px; height: 30px; font-size: 0.85rem; }
  .lb-stat .lb-metric { display: none; } /* 窄屏隐去指标名，只留数值 */
}
/* ═══════════════════════════════════════════════════════════
   筛选排序下拉
   ═══════════════════════════════════════════════════════════ */

.fa-filter-bar {
  display: inline-flex;
  gap: 6px;
  margin-left: 10px;
  vertical-align: middle;
}

.fa-filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  font-size: 0.78rem;
  background: var(--raised);
  border: 1px solid var(--border-light, #ddd);
  border-radius: 6px;
  cursor: pointer;
  color: var(--ink, #333);
  white-space: nowrap;
  transition: border-color 0.15s, background 0.15s;
}

.fa-filter-btn:hover {
  border-color: var(--primary);
  background: oklch(0.95 0.02 250);
}

.filter-dropdown {
  background: var(--raised);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  min-width: 140px;
  padding: 4px 0;
  font-size: 0.82rem;
}

.filter-dd-header {
  padding: 6px 12px;
  font-weight: 600;
  color: var(--ink-soft);
  font-size: 0.75rem;
  border-bottom: 1px solid var(--border-light);
}

.filter-dd-item {
  padding: 7px 12px;
  cursor: pointer;
  color: var(--ink);
  transition: background 0.1s;
}

.filter-dd-item:hover {
  background: oklch(0.95 0.02 250);
}

.filter-dd-item.filter-dd-active {
  background: oklch(0.92 0.04 250);
  font-weight: 600;
  color: var(--primary-dark);
}

html[data-bnu-theme="dark"] .fa-filter-btn:hover,
html[data-bnu-theme="dark"] .filter-dd-item:hover {
  background: var(--primary-surface);
}
html[data-bnu-theme="dark"] .filter-dd-item.filter-dd-active {
  background: var(--primary-surface);
  color: var(--primary);
}