/* ============================================================
   秋辞社区 · 管理后台 v4 简洁风（全站统一）
   · 对齐「添加圈子」弹窗视觉：纯白表面、蓝色主按钮、两栏表单网格
   · 移除全站液态玻璃拟态（侧边栏 / 顶栏 / 卡片 / 弹窗 / 统计卡）
   · 移除高耗能无限动画，提升移动端流畅度
   · 必须放在 admin.css / premium.css / music.css 之后加载
   ============================================================ */

/* ---------- 1. 主题变量：浅色 / 深色 都改为扁平化 ---------- */
:root {
  --bg: #f3f5f9;
  --bg-grad: linear-gradient(135deg, #f3f5f9 0%, #f7f9fc 100%);
  --card: #ffffff;
  --card-solid: #ffffff;
  --fill: #f7f8fa;
  --fill-2: #eef0f4;
  --line: rgba(16, 24, 40, .07);
  --line-strong: rgba(16, 24, 40, .14);
  --glass-blur: 0px;
  --shadow-card: 0 1px 2px rgba(16,24,40,.04), 0 10px 28px -14px rgba(16,24,40,.10);
  --shadow-soft: 0 2px 10px -4px rgba(16,24,40,.08);
}
[data-theme="dark"] {
  --bg: #0e1016;
  --bg-grad: linear-gradient(135deg, #0e1016 0%, #131722 100%);
  --card: #171a22;
  --card-solid: #171a22;
  --fill: rgba(255,255,255,.05);
  --fill-2: rgba(255,255,255,.09);
  --line: rgba(255,255,255,.08);
  --line-strong: rgba(255,255,255,.15);
}

/* ---------- 2. 全局去掉玻璃拟态（性能关键：backdrop-filter 在移动端极贵） ---------- */
.sidebar, .topbar, .card, .stat, .modal, .theme-panel, .theme-panel-mask,
.notify-panel, .lang-dropdown, .admin-menu, .tabbar, .mp-panel, .sk-card,
.btn.ghost, #toast, .welcome-card, .sk-tooltip, [data-menu="icon"] .sidebar nav a::before {
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}

/* ---------- 3. 侧边栏：纯白简洁（覆盖 premium.css 的极光玻璃） ---------- */
.sidebar {
  background: var(--card-solid);
  border-right: 1px solid var(--line);
  box-shadow: 1px 0 0 rgba(16,24,40,.02);
}
[data-theme="dark"] .sidebar { background: var(--card-solid); border-right-color: var(--line); }
.sidebar::before, .sidebar::after { display: none !important; }   /* 极光背景 + 噪点 */
.sidebar .brand {
  padding: 20px 18px 16px;
  border-bottom: 1px solid var(--line);
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  animation: none;
}
[data-theme="dark"] .sidebar .brand { border-bottom-color: var(--line); }
.sidebar .brand::after { display: none !important; }              /* 边缘流光 */
.sidebar .brand .logo {
  width: 40px; height: 40px; border-radius: 11px;
  box-shadow: 0 4px 14px -6px var(--accent-soft);
}
.sidebar .brand .logo::before, .sidebar .brand .logo::after { display: none !important; } /* 旋转光环 + 高光 */
.sidebar .brand .name {
  background: none;
  -webkit-background-clip: initial; background-clip: initial;
  -webkit-text-fill-color: var(--text); color: var(--text);
  animation: none;
}
.sidebar nav { padding: 10px 10px 14px; }
.sidebar nav .group { animation: none; padding: 14px 12px 6px; font-size: 11px; letter-spacing: 1.5px; }
.sidebar nav .group::before { display: none; }
.sidebar nav a {
  border: none;
  border-radius: 10px;
  margin-bottom: 3px;
  padding: 11px 12px;
  animation: none;
  will-change: auto;
  transition: background .2s ease, color .2s ease, transform .15s ease;
}
.sidebar nav a::before, .sidebar nav a::after { display: none !important; } /* 玻璃高光扫过 + 发光条 */
.sidebar nav a:hover { transform: translateX(2px); background: var(--fill); border-color: transparent; box-shadow: none; }
.sidebar nav a.active {
  background: var(--accent-soft);
  border-color: transparent;
  box-shadow: none;
  color: var(--accent);
  animation: none;
}
[data-theme="dark"] .sidebar nav a.active { background: var(--accent-soft); }
.sidebar nav a.active::before, .sidebar nav a.active::after { display: none; }
.sidebar nav a.active .ico { filter: none; }
.sidebar nav a.active span { animation: none; }
.sidebar .foot {
  border-top: 1px solid var(--line);
  animation: none;
}
[data-theme="dark"] .sidebar .foot { border-top-color: var(--line); }
.sidebar .foot::before { animation: none; box-shadow: none; }

/* ---------- 4. 顶栏：纯白简洁 ---------- */
.topbar { background: var(--card-solid); border-bottom: 1px solid var(--line); }
[data-theme="dark"] .topbar { background: var(--card-solid); }
.topbar::before { display: none !important; }
.topbar.scrolled { background: var(--card-solid); box-shadow: 0 2px 12px -6px rgba(16,24,40,.08); }
[data-menu="top"] .top-nav a { border: none; }
[data-menu="top"] .top-nav a::before { display: none; }
[data-menu="top"] .top-nav a.active { box-shadow: none; }

/* ---------- 5. 卡片 / 统计卡：纯白 + 轻阴影 ---------- */
.card, .stat, .welcome-card, .sk-card {
  background: var(--card-solid);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--line);
}
[data-theme="dark"] .card, [data-theme="dark"] .stat, [data-theme="dark"] .welcome-card, [data-theme="dark"] .sk-card {
  background: var(--card-solid);
  box-shadow: 0 8px 24px -12px rgba(0,0,0,.5);
}
.card::before, .stat::before, .stat::after { display: none !important; }   /* 玻璃高光 + 呼吸光斑 */
.card:hover, .stat:hover { transform: translateY(-1px); box-shadow: var(--shadow-card), 0 8px 20px -10px rgba(16,24,40,.12); }
.welcome-card { background: linear-gradient(135deg, var(--accent-soft), rgba(255,255,255,.85)); }
[data-theme="dark"] .welcome-card { background: linear-gradient(135deg, rgba(10,132,255,.16), rgba(28,28,30,.7)); }
.welcome-glow { display: none; }                                          /* 呼吸光斑 */
.welcome-emoji { animation: none; }
.welcome-badge { animation: none; }

/* ---------- 6. 弹窗 / 面板：纯白，去掉玻璃 ---------- */
.modal-mask { backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); }
.modal {
  background: var(--card-solid);
  border: 1px solid var(--line);
  box-shadow: 0 24px 60px -24px rgba(16,24,40,.28);
  border-radius: 16px;
}
[data-theme="dark"] .modal { background: var(--card-solid); border-color: var(--line); }
.modal::before { display: none !important; }
.modal .m-head { padding: 18px 22px; }
.modal .m-head h3 { font-size: 16px; }
.modal .m-close { background: var(--fill); }
.modal .m-body { padding: 20px 22px; }
.modal .m-foot { padding: 14px 22px; }
.notify-panel, .lang-dropdown {
  background: var(--card-solid);
  border: 1px solid var(--line);
  box-shadow: 0 16px 40px -16px rgba(16,24,40,.22);
}
[data-theme="dark"] .notify-panel, [data-theme="dark"] .lang-dropdown { background: var(--card-solid); }
.theme-panel {
  background: var(--card-solid);
  border: 1px solid var(--line);
  box-shadow: 0 24px 60px -24px rgba(16,24,40,.3);
}
.theme-panel-mask { backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); }
.tabbar { background: var(--card-solid); border-top: 1px solid var(--line); }
[data-theme="dark"] .tabbar { background: var(--card-solid); }

/* ---------- 7. 表单：白底 + 浅边框 + 圆角（对齐「添加圈子」） ---------- */
.form-item label { font-size: 12px; font-weight: 600; margin-bottom: 6px; }
.form-item input[type=text], .form-item input[type=password], .form-item input[type=number],
.form-item input[type=email], .form-item input[type=color], .form-item select, .form-item textarea,
.toolbar input[type=text], .toolbar select, .fb-detail textarea {
  background: #ffffff;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: 10px 13px;
  font-size: 13px;
  box-shadow: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}
[data-theme="dark"] .form-item input[type=text], [data-theme="dark"] .form-item input[type=password],
[data-theme="dark"] .form-item input[type=number], [data-theme="dark"] .form-item input[type=email],
[data-theme="dark"] .form-item input[type=color], [data-theme="dark"] .form-item select,
[data-theme="dark"] .form-item textarea, [data-theme="dark"] .toolbar input[type=text],
[data-theme="dark"] .toolbar select {
  background: rgba(255,255,255,.05);
}
.form-item input:focus, .form-item textarea:focus, .form-item select:focus,
.toolbar input:focus, .toolbar select:focus {
  border-color: var(--accent);
  background: #ffffff;
  box-shadow: 0 0 0 3px var(--accent-soft);
  transform: none;
}
[data-theme="dark"] .form-item input:focus, [data-theme="dark"] .form-item textarea:focus,
[data-theme="dark"] .form-item select:focus, [data-theme="dark"] .toolbar input:focus,
[data-theme="dark"] .toolbar select:focus { background: rgba(255,255,255,.07); }
.form-item textarea { min-height: 84px; }

/* ---------- 8. 两栏表单网格：手机上也保持两栏（对齐第 2 张图） ---------- */
.form-grid { gap: 14px 16px; }
@media (max-width: 600px) {
  .form-grid { grid-template-columns: 1fr 1fr; gap: 12px 14px; }
  .modal { max-width: 94vw; }
}
@media (max-width: 380px) {
  .form-grid { grid-template-columns: 1fr; }
}

/* ---------- 9. 按钮：扁平化，主按钮蓝色、次按钮灰边 ---------- */
.btn { background: linear-gradient(135deg, var(--accent), var(--accent-2)); box-shadow: 0 4px 12px -6px var(--accent-soft); }
.btn:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 8px 18px -8px var(--accent-soft); filter: brightness(1.04); }
.btn::after { display: none; }   /* 涟漪层 */
.btn.ghost {
  background: var(--card-solid);
  border: 1px solid var(--line-strong);
  color: var(--text-2);
  box-shadow: none;
}
.btn.ghost:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.btn.danger { background: linear-gradient(135deg, #ff6b6b, var(--red)); box-shadow: 0 4px 12px -6px rgba(255,59,48,.4); }

/* ---------- 10. 表格：去掉高亮扫过、减少错峰动画 ---------- */
.table th { background: var(--fill); }
.table th::after { display: none; }
.table th:hover::after { display: none; }
.table tbody tr { animation-duration: .2s; }
.table tbody tr:nth-child(n+4) { animation-delay: 0s; }
.table tbody tr:hover td { background: var(--accent-soft); }

/* ---------- 11. 头像：去掉旋转光环 ---------- */
.av::before { display: none !important; }
.av > .av-ring { animation: none; }

/* ---------- 12. 动效减负：错峰动画最多 3 个，去掉其余延迟 ---------- */
.form-item:nth-child(n+4) { animation-delay: 0s; }
.form-item { animation-duration: .25s; }
.stat { animation-duration: .3s; }
.stat:nth-child(n+4) { animation-delay: 0s; }
.badge { animation-duration: .25s; }
.badge.red { animation: none; }
.badge.gold, .badge.green, .badge.gray { animation: none; }

/* ---------- 13. 滚动进度条 / 请求条：保留但轻量 ---------- */
.scroll-progress { height: 2px; }
.req-bar { height: 2px; }

/* ---------- 14. 管理员个人下拉菜单（对齐第 3 张图） ---------- */
.topbar .topbar-right { position: relative; }
.admin-user {
  display: flex; align-items: center; gap: 8px;
  padding: 4px 8px 4px 4px;
  background: var(--fill);
  border: 1px solid var(--line);
  border-radius: 24px;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color .2s ease, background .2s ease;
}
.admin-user:hover, .admin-user.open { border-color: var(--accent); background: var(--accent-soft); }
.admin-avatar {
  width: 32px; height: 32px; border-radius: 50%; overflow: hidden; flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex; align-items: center; justify-content: center;
  color: #fff; position: relative;
}
.admin-avatar svg { width: 16px; height: 16px; stroke: #fff; }
.admin-avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }
.admin-avatar::after { display: none; }   /* 在线绿点，扁平风去掉 */
.admin-info { display: flex; flex-direction: column; line-height: 1.3; }
.admin-name { font-weight: 700; font-size: 12px; color: var(--text); max-width: 64px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.admin-role { font-size: 9px; color: var(--accent); font-weight: 600; }
.admin-caret { width: 14px; height: 14px; stroke: var(--muted); flex-shrink: 0; transition: transform .25s ease; }
.admin-user.open .admin-caret { transform: rotate(180deg); stroke: var(--accent); }

.admin-menu {
  position: absolute; top: calc(100% + 8px); right: 0;
  width: 232px;
  background: var(--card-solid);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 18px 44px -16px rgba(16,24,40,.26);
  padding: 8px;
  opacity: 0; visibility: hidden;
  transform: translateY(-6px) scale(.98);
  transform-origin: top right;
  transition: opacity .18s ease, transform .22s ease, visibility .18s;
  z-index: 120;
}
.admin-menu.show { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.admin-menu .am-head {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 6px;
}
.admin-menu .am-head .am-avatar {
  width: 40px; height: 40px; border-radius: 50%; flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-weight: 800; font-size: 17px;
  display: flex; align-items: center; justify-content: center;
}
.admin-menu .am-head .am-avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.admin-menu .am-meta { min-width: 0; }
.admin-menu .am-name { font-size: 14px; font-weight: 700; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.admin-menu .am-uid { font-size: 11px; color: var(--muted); margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.admin-menu .am-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: 9px;
  font-size: 13px; font-weight: 500; color: var(--text-2);
  cursor: pointer; user-select: none;
  transition: background .15s ease, color .15s ease;
}
.admin-menu .am-item svg { width: 16px; height: 16px; stroke: currentColor; stroke-width: 1.8; fill: none; flex-shrink: 0; }
.admin-menu .am-item:hover { background: var(--fill); color: var(--text); }
.admin-menu .am-item.am-danger { color: var(--red); }
.admin-menu .am-item.am-danger:hover { background: var(--red-soft); color: var(--red); }

/* ---------- 15. 深色模式下的个人菜单 ---------- */
[data-theme="dark"] .admin-menu { background: var(--card-solid); border-color: var(--line); box-shadow: 0 18px 44px -16px rgba(0,0,0,.6); }
[data-theme="dark"] .admin-menu .am-item:hover { background: var(--fill); }
[data-theme="dark"] .admin-menu .am-item.am-danger:hover { background: var(--red-soft); }

/* ---------- 16. 关闭动效开关时：一键全停（性能兜底） ---------- */
[data-motion="off"] *, [data-motion="off"] *::before, [data-motion="off"] *::after {
  animation: none !important;
  transition-duration: .01s !important;
}

/* ---------- 17. 移动端抽屉遮罩：轻量模糊 ---------- */
.sidebar-mask.show { animation: none; backdrop-filter: blur(2px); -webkit-backdrop-filter: blur(2px); }

/* ---------- 18. 其他零散玻璃点 ---------- */
.fb-detail .fb-content-box, .fb-batch-content { background: var(--fill); }
.img-fallback { background: var(--fill); }
.mp-panel { background: var(--card-solid); border: 1px solid var(--line); }
[data-theme="dark"] .mp-panel { background: var(--card-solid); }