/* ===== CSS Variables — X/Twitter Light Theme ===== */
:root {
  --bg: #ffffff;
  --bg-secondary: #f7f9fa;
  --card-bg: #ffffff;
  --text: #0f1419;
  --text-muted: #536471;
  --accent: #1d9bf0;
  --accent-hover: #1a8cd8;
  --border: #eff3f4;
  --danger: #f4212e;
  --danger-hover: #dc1f2b;
  --success: #00ba7c;
  --warning: #f39c12;
  --radius: 16px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06);
  --transition: 0.2s ease;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-secondary);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  padding-top: 0;
  padding-bottom: env(safe-area-inset-bottom);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ===== X-Style Layout ===== */
.layout {
  display: flex;
  max-width: 1200px;
  margin: 0 auto;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 250px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  background: var(--card-bg);
  z-index: 200;
  overflow-y: auto;
  padding-top: env(safe-area-inset-top);
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 0 12px;
}

.sidebar-logo {
  font-size: 1.3rem;
  font-weight: 800;
  padding: 16px 12px;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 12px;
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.15s;
}

.nav-item:hover {
  background: var(--bg-secondary);
  text-decoration: none;
}

.nav-item.active {
  font-weight: 700;
}

.nav-icon {
  font-size: 1.3rem;
  width: 28px;
  text-align: center;
  flex-shrink: 0;
}

.nav-badge {
  margin-left: auto;
  background: var(--danger);
  color: #fff;
  font-size: 0.7rem;
  padding: 1px 6px;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
  font-weight: 700;
}

.sidebar-post-btn {
  margin: 12px 0;
  border-radius: 999px !important;
  padding: 14px !important;
  font-size: 1rem !important;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s;
  margin-top: auto;
}

.sidebar-user:hover {
  background: var(--bg-secondary);
}

.sidebar-user-avatar {
  width: 40px;
  height: 40px;
  font-size: 1rem;
}

.sidebar-user-info {
  flex: 1;
  min-width: 0;
}

.sidebar-user-name {
  font-weight: 700;
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-handle {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.sidebar-more-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 50%;
}

.sidebar-more-btn:hover {
  background: var(--bg-secondary);
}

.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 150;
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: 250px;
  max-width: 600px;
  border-right: 1px solid var(--border);
  min-height: 100vh;
}

/* Mobile Header */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 100;
  height: 53px;
  align-items: center;
  padding: 0 16px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.mobile-menu-btn {
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  padding: 4px;
  color: var(--text);
}

.mobile-header-title {
  flex: 1;
  font-weight: 700;
  font-size: 1.1rem;
  margin-left: 12px;
}

.mobile-header-actions {
  display: flex;
  gap: 8px;
}

.mobile-icon-btn {
  background: none;
  border: none;
  font-size: 1.3rem;
  cursor: pointer;
  padding: 4px;
  color: var(--text);
  position: relative;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ===== Header / Navbar ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 16px;
  padding-top: env(safe-area-inset-top);
}

.header-inner {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 53px;
}

.logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.3px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-user {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.avatar-circle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  color: #fff;
  flex-shrink: 0;
}

.avatar-default {
  background: #1d9bf0;
}

.avatar-anonymous {
  background: #cfd9de;
  color: #536471;
}

.avatar-initials {
  background: #1d9bf0;
}

.avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  display: block;
}

.comment-avatar {
  display: inline-flex;
  align-items: center;
  vertical-align: middle;
  margin-right: 6px;
}
.comment-avatar .avatar-circle {
  width: 22px;
  height: 22px;
  font-size: 0.65rem;
}
.comment-avatar .avatar-img {
  width: 22px;
  height: 22px;
}

/* [2026-08-31] 个人主页头像：自定义图片和字母头像统一 56px，防止图片溢出遮挡内容 */
.user-profile-avatar .avatar-img {
  width: 56px;
  height: 56px;
}
.user-profile-avatar .avatar-circle {
  width: 56px;
  height: 56px;
  font-size: 1.3rem;
}

/* [2026-08-31] Word 文档附件卡片 */
.docx-card {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  margin-top: 8px;
  background: var(--bg-secondary, #f0f2f3);
  border: 1px solid var(--border, #e5e7eb);
  border-radius: 10px;
  font-size: 0.85rem;
}
.docx-card .docx-icon { font-size: 1.25rem; flex-shrink: 0; }
.docx-card .docx-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text);
}
.docx-card .docx-dl {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
  flex-shrink: 0;
}
.docx-card .docx-dl:hover { text-decoration: underline; }

.btn-login {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: background var(--transition);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.btn-login:hover {
  background: var(--accent-hover);
  text-decoration: none;
}

.btn-logout {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition);
}

.btn-logout:hover {
  background: rgba(244, 33, 46, 0.06);
  border-color: var(--danger);
  color: var(--danger);
}

.admin-link {
  font-size: 1.1rem;
  color: var(--text-muted);
  transition: color var(--transition);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.admin-link:hover {
  color: var(--text);
  background: var(--bg-secondary);
  text-decoration: none;
}

/* ===== Main ===== */
.main {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 0 24px;
}

/* ===== Post List ===== */
.post-list {
  display: flex;
  flex-direction: column;
}

/* ===== Post Card ===== */
.post-card {
  background: var(--card-bg);
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  border-left: none;
  border-right: none;
  border-radius: 0;
  cursor: pointer;
  transition: background var(--transition);
}

.post-card:hover {
  background: #f7f9fa;
}

.post-card.pinned {
  border-left: 3px solid var(--accent);
  padding-left: 13px;
}

.post-card-top {
  display: flex;
  gap: 10px;
}

.post-avatar-col {
  flex-shrink: 0;
  /* [2026-08-31] 修复自定义头像撑大：给列固定宽度，img 才不会按原图尺寸渲染 */
  width: 32px;
}
.post-avatar-col .avatar-img {
  width: 32px;
  height: 32px;
}
.post-avatar-col .avatar-circle {
  width: 32px;
  height: 32px;
}

.post-body-col {
  flex: 1;
  min-width: 0;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 2px;
  flex-wrap: wrap;
}

.post-author-name {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--text);
}

.post-author-info {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.post-time {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.founder-active .post-author-name { position: relative; }

.verify-badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.75rem;
  margin-left: 3px;
  cursor: help;
}

/* [2026-08-16] 等级徽章（植物系） */
.level-badge {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0 6px;
  border-radius: 20px;
  border: 1px solid currentColor;
  margin-left: 4px;
  line-height: 1.5;
  vertical-align: middle;
  white-space: nowrap;
}
.level-badge .lb-name { font-weight: 500; }

/* 等级进度条 */
.level-progress {
  height: 6px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 6px;
}
.level-progress-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s;
}

.pin-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: var(--accent);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: 20px;
}

.post-content {
  /* [2026-08-16] 字体大小由 --post-font-size CSS 变量控制（Lv.3 特权，仅影响本人浏览） */
  font-size: var(--post-font-size, 0.93rem);
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  margin-bottom: 8px;
}

/* [2026-08-07] Paragraph spacing inside Markdown-rendered content
   (global reset zeroes <p> margin, so \n\n paragraph breaks showed no gap) */
.post-content p,
.board-post-content p,
.comment-content p,
.repost-quote-content p,
.post-card-content p {
  margin: 0.5em 0;
}
.post-content p:first-child,
.board-post-content p:first-child,
.comment-content p:first-child,
.repost-quote-content p:first-child,
.post-card-content p:first-child {
  margin-top: 0;
}
.post-content p:last-child,
.board-post-content p:last-child,
.comment-content p:last-child,
.repost-quote-content p:last-child,
.post-card-content p:last-child {
  margin-bottom: 0;
}

/* Long content auto-collapse */
.collapse-btn {
  font-size: 0.82rem;
  color: var(--accent);
  padding: 2px 0;
  margin-bottom: 8px;
  cursor: pointer;
  background: none;
  border: none;
}
.collapse-btn:hover {
  text-decoration: underline;
}
.post-content-preview {
  opacity: 0.92;
}

.post-media {
  margin-bottom: 8px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
}

.post-media img,
.post-media video {
  width: 100%;
  border-radius: var(--radius);
}

/* ===== Post Actions ===== */
.post-actions {
  display: flex;
  align-items: center;
  gap: 0;
  max-width: 425px;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.82rem;
  padding: 6px 10px;
  border-radius: 20px;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  min-width: 48px;
}

.action-btn:hover {
  color: var(--accent);
  background: rgba(29, 155, 240, 0.08);
}

.action-btn.liked {
  color: #f91880;
}

.action-btn.liked:hover {
  background: rgba(249, 24, 128, 0.08);
}

.action-btn:active {
  transform: scale(0.94);
}

.action-icon {
  font-size: 1.05rem;
  line-height: 1;
}

/* ===== Comments Section ===== */
.comments-section {
  margin-top: 8px;
  border-top: 1px solid var(--border);
  padding-top: 8px;
}

.comment-item {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

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

.comment-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 2px;
}

.comment-nickname {
  font-weight: 700;
  font-size: 0.82rem;
  color: var(--text);
}

.comment-time {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.comment-content {
  font-size: 0.88rem;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
}

.comment-input-area {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  align-items: center;
}

.comment-anon-label {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}

.comment-anon-check {
  accent-color: var(--accent);
  cursor: pointer;
}

.comment-input {
  flex: 1;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 8px 16px;
  color: var(--text);
  font-size: 0.85rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition);
}

.comment-input:focus {
  border-color: var(--accent);
  background: #fff;
}

.comment-input::placeholder {
  color: var(--text-muted);
}

.comment-submit {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: background var(--transition);
  white-space: nowrap;
}

.comment-submit:hover {
  background: var(--accent-hover);
}

.comment-submit:disabled {
  opacity: 0.5;
  cursor: default;
}

/* ===== FAB ===== */
.fab {
  position: fixed;
  bottom: max(28px, env(safe-area-inset-bottom, 28px));
  right: max(24px, env(safe-area-inset-right, 24px));
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 2px 16px rgba(29, 155, 240, 0.35);
  transition: all var(--transition);
  z-index: 200;
}

.fab:hover {
  transform: scale(1.06);
  box-shadow: 0 4px 24px rgba(29, 155, 240, 0.45);
}

.fab:active {
  transform: scale(0.94);
}

/* ===== Modal ===== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.modal-content {
  position: relative;
  background: var(--card-bg);
  border-radius: var(--radius) var(--radius) 0 0;
  width: 100%;
  max-width: 540px;
  max-height: 85vh;
  overflow-y: auto;
  padding-bottom: env(safe-area-inset-bottom);
  animation: slideUp 0.25s ease;
}

@keyframes slideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--card-bg);
  z-index: 1;
}

.modal-header h2 {
  font-size: 1.1rem;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
  transition: color var(--transition);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.modal-body {
  padding: 20px;
}

/* ===== Forms ===== */
.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 6px;
  margin-top: 16px;
  color: var(--text);
}

.form-label:first-child {
  margin-top: 0;
}

.form-hint {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.form-required {
  color: var(--danger);
}

.form-input {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--text);
  font-size: 0.93rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition);
}

/* [2026-08-07] Markdown toolbar buttons (B/I/S) above post textarea */
.md-toolbar {
  display: flex;
  gap: 6px;
  margin-bottom: 6px;
}
.md-btn {
  width: 30px;
  height: 30px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--text);
  font-size: 0.85rem;
  font-family: inherit;
  cursor: pointer;
  line-height: 1;
  transition: all 0.15s;
}
.md-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(29,155,240,0.06);
}
.md-btn-i em { font-style: italic; }
.md-btn-s s { text-decoration: line-through; }

.form-textarea {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--text);
  font-size: 0.93rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition);
  resize: vertical;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--accent);
  background: #fff;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-file {
  display: block;
  margin-top: 6px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.form-error {
  background: rgba(244, 33, 46, 0.06);
  border: 1px solid rgba(244, 33, 46, 0.2);
  color: var(--danger);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  margin-top: 12px;
}

.media-preview {
  margin-top: 10px;
}

.media-preview img,
.media-preview video {
  max-height: 200px;
  border-radius: var(--radius-sm);
}

/* Checkbox row */
.form-check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
}

.form-check-row label {
  font-size: 0.9rem;
  color: var(--text);
  cursor: pointer;
}

.form-check-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  border: none;
  border-radius: 24px;
  font-size: 0.93rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: default;
}

.btn-secondary {
  background: none;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-danger:hover {
  background: var(--danger-hover);
}

.btn-full {
  width: 100%;
  margin-top: 20px;
}

.btn-load-more {
  background: none;
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 24px;
  font-size: 0.88rem;
  padding: 10px 36px;
  font-weight: 600;
}

.btn-load-more:hover {
  background: rgba(29, 155, 240, 0.06);
  border-color: var(--accent);
}

.btn-group {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}

.btn-group .btn {
  flex: 1;
}

/* ===== Scroll Sentinel (for IntersectionObserver) ===== */
#scroll-sentinel {
  height: 1px;
  width: 100%;
}

/* ===== Load More ===== */
.load-more-area {
  text-align: center;
  padding: 20px 0;
}

.spinner {
  display: inline-flex;
  gap: 6px;
  padding: 12px;
}

.spinner-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: bounce 1.2s infinite ease-in-out;
}

.spinner-dot:nth-child(2) { animation-delay: 0.15s; }
.spinner-dot:nth-child(3) { animation-delay: 0.3s; }

@keyframes bounce {
  0%, 80%, 100% { transform: scale(0.4); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

.no-more {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.report-confirm-text {
  margin-bottom: 12px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: #fff;
  padding: 10px 24px;
  border-radius: 24px;
  font-size: 0.88rem;
  font-weight: 500;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
  z-index: 400;
  animation: fadeInUp 0.3s ease;
}

.toast.error {
  background: var(--danger);
}

.toast.success {
  background: var(--success);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* ===== Suspended Banner ===== */
.suspended-banner {
  position: sticky;
  top: 0;
  z-index: 98;
  background: #fff4e5;
  border-bottom: 1px solid #ffd699;
  padding: 10px 16px;
  text-align: center;
}

.suspended-banner p {
  font-size: 0.85rem;
  color: #cc7a00;
}

.suspended-banner a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: underline;
}

.suspended-banner a:hover {
  text-decoration: none;
}

/* ===== Class Alert Section ===== */
.class-section-alert {
  border: 2px solid var(--danger) !important;
  background: rgba(244,33,46,0.02) !important;
}

/* ===== Login Prompt ===== */
.login-prompt {
  text-align: center;
  padding: 40px 20px 60px;
}

.login-prompt-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  max-width: 360px;
  margin: 0 auto;
}

.login-prompt-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.login-prompt-card .btn {
  display: inline-flex;
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 12px;
  opacity: 0.5;
}

.empty-state-text {
  font-size: 0.95rem;
}

/* ===== Auth Pages (login, register, appeal) ===== */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  padding: 20px;
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
}

.auth-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 32px 28px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow);
}

.auth-card h1 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text);
}

.auth-card .auth-subtitle {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.form-radio-group {
  display: flex;
  gap: 12px;
  margin-top: 6px;
}

.form-radio {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--text);
  cursor: pointer;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  flex: 1;
  justify-content: center;
}

.form-radio:has(input:checked) {
  border-color: var(--accent);
  background: rgba(29, 155, 240, 0.06);
  color: var(--accent);
}

.form-radio input[type="radio"] {
  accent-color: var(--accent);
}

.appeal-type-selector {
  margin-bottom: 4px;
}

.post-identity-info {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  font-size: 0.88rem;
}

.auth-warning {
  font-size: 0.82rem;
  color: var(--danger);
  background: rgba(244, 33, 46, 0.06);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  line-height: 1.4;
}

.auth-card .form-label {
  margin-top: 14px;
}

.auth-card .form-label:first-of-type {
  margin-top: 0;
}

.auth-card .btn-full {
  margin-top: 24px;
}

.auth-links {
  text-align: center;
  margin-top: 20px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.auth-links a {
  color: var(--accent);
  font-weight: 500;
}

.auth-links span {
  margin: 0 8px;
  color: var(--border);
}

/* Inline form row (year + class side by side) */
.form-row {
  display: flex;
  gap: 12px;
}

.form-row .form-col {
  flex: 1;
}

.form-row .form-col:first-child {
  flex: 0 0 100px;
}

/* ===== Notification Bell & Dropdown ===== */
.notification-bell {
  position: relative;
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 6px 8px;
  border-radius: 50%;
  transition: background var(--transition);
  line-height: 1;
  color: var(--text-muted);
}

.notification-bell:hover {
  background: var(--bg-secondary);
  color: var(--text);
}

.notification-badge {
  position: absolute;
  top: 2px;
  right: 2px;
  background: var(--danger);
  color: #fff;
  font-size: 0.62rem;
  font-weight: 700;
  min-width: 16px;
  height: 16px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  line-height: 1;
}

.notification-dropdown {
  position: fixed;
  top: 60px;
  left: 280px;
  width: 350px;
  max-height: 500px;
  overflow-y: auto;
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: 0 4px 24px rgba(0,0,0,0.12);
  border: 1px solid var(--border);
  z-index: 250;
  animation: fadeInDown 0.15s ease;
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.notification-dropdown-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-weight: 700;
  font-size: 0.95rem;
  position: sticky;
  top: 0;
  background: var(--card-bg);
  z-index: 1;
}

.notification-list {
  /* scroll handled by parent */
}

.notification-item {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background var(--transition);
}

.notification-item:hover {
  background: var(--bg-secondary);
}

.notification-item.unread {
  background: rgba(29, 155, 240, 0.04);
}

.notification-item.unread:hover {
  background: rgba(29, 155, 240, 0.08);
}

.notification-item-title {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text);
  margin-bottom: 2px;
}

.notification-item-content {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.notification-item-time {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== Category Bar ===== */
.category-bar {
  position: sticky;
  top: 0;
  z-index: 99;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
}

.category-bar-inner {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  overflow-x: auto;
  gap: 0;
  padding: 0 4px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  flex: 1;
  min-width: 0;
}

.category-bar-inner::-webkit-scrollbar { display: none; }

.cat-btn {
  flex-shrink: 0;
  background: none;
  border: none;
  padding: 10px 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
}

.cat-btn:hover { color: var(--text); background: var(--bg-secondary); }
.cat-btn.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 700; }

.cat-scroll-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.3rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 8px 4px;
  flex-shrink: 0;
  line-height: 1;
}

@media (min-width: 768px) {
  .cat-scroll-btn { display: block; }
}

.cat-badge {
  display: inline-block;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 12px;
  background: var(--bg-secondary);
  color: var(--text-muted);
  margin-right: 6px;
}

.form-select {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--text);
  font-size: 0.93rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition);
  appearance: auto;
}

.form-select:focus {
  border-color: var(--accent);
}

/* ===== Comment Reply ===== */
.comment-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 2px;
}

.comment-reply-btn {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 0.78rem;
  cursor: pointer;
  padding: 4px 0;
  font-family: inherit;
  margin-top: 4px;
}

.comment-reply-btn:hover {
  text-decoration: underline;
}

.reply-input-area {
  display: flex;
  gap: 6px;
  margin-top: 6px;
}

.replies-section {
  margin-top: 6px;
  margin-left: 16px;
  padding-left: 12px;
  border-left: 2px solid var(--border);
}

.reply-item {
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}

.reply-item:last-child {
  border-bottom: none;
}

/* ===== Image Lightbox ===== */
.lightbox {
  position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
  background: rgba(0,0,0,0.9); z-index: 9999; display: flex;
  align-items: center; justify-content: center; cursor: pointer;
}
.lightbox img { max-width: 90vw; max-height: 90vh; object-fit: contain; }
.lightbox-close {
  position: absolute; top: 16px; right: 24px; color: #fff;
  font-size: 2rem; cursor: pointer; font-weight: 700; z-index: 10001;
}
.lightbox-prev, .lightbox-next {
  position: absolute; top: 50%; transform: translateY(-50%);
  background: rgba(255,255,255,0.15); color: #fff; border: none;
  font-size: 2.5rem; width: 48px; height: 80px; cursor: pointer;
  border-radius: 6px; z-index: 10000; display: flex; align-items: center;
  justify-content: center; transition: background 0.15s;
  font-family: inherit; line-height: 1;
}
.lightbox-prev:hover, .lightbox-next:hover { background: rgba(255,255,255,0.3); }
.lightbox-prev { left: 8px; }
.lightbox-next { right: 8px; }
.lightbox-counter {
  position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%);
  color: #fff; font-size: 0.9rem; z-index: 10000;
  background: rgba(0,0,0,0.5); padding: 4px 12px; border-radius: 12px;
}
@media (max-width: 767px) {
  .lightbox-prev, .lightbox-next { width: 36px; height: 60px; font-size: 1.8rem; }
  .lightbox-prev { left: 4px; }
  .lightbox-next { right: 4px; }
}

/* ===== Repost Quote ===== */
.repost-quote {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-bottom: 8px;
  background: var(--bg-secondary);
}

.repost-quote-author {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 4px;
}

.repost-quote-content {
  font-size: 0.88rem;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
}

/* ===== Responsive: Mobile ===== */
@media (max-width: 767px) {
  .sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 200;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    width: 280px;
    box-shadow: 2px 0 20px rgba(0,0,0,0.15);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
    width: 100%;
    max-width: 100%;
    border-right: none;
  }

  .mobile-header {
    display: flex;
  }

  .category-bar {
    top: 53px; /* below mobile header */
  }

  .suspended-banner {
    top: 53px; /* below mobile header */
  }

  .notification-dropdown {
    left: 50%;
    transform: translateX(-50%);
    top: 56px;
    width: calc(100% - 32px);
  }

  body {
    padding-top: 0;
  }
}

/* ===== Responsive: Desktop ===== */
@media (min-width: 768px) {
  .category-bar {
    top: 0;
  }

  .suspended-banner {
    top: 0;
  }

  .main-content {
    padding-top: 0;
  }

  body {
    padding-top: 0;
  }

  .main {
    padding: 0 0 24px;
  }

  .modal {
    align-items: center;
  }

  .modal-content {
    border-radius: var(--radius);
    max-height: 80vh;
  }

  @keyframes slideUp {
    from { transform: translateY(40px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
  }

  .post-card {
    border-radius: 0;
  }
}

@media (min-width: 1000px) {
  .sidebar {
    width: 275px;
  }

  .main-content {
    margin-left: 275px;
  }
}