/* Prep Portal Admin - shared styles */
:root {
  --sidebar-bg: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  --sidebar-bg-solid: #1e293b;
  --sidebar-text: #e2e8f0;
  --sidebar-hover: rgba(255,255,255,0.08);
  --sidebar-active: rgba(255,255,255,0.12);
  --header-bg: #fff;
  --header-border: #e2e8f0;
  --main-bg: #f8fafc;
  --card-bg: #fff;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.04);
  --card-shadow-hover: 0 8px 24px rgba(0,0,0,0.06);
  --card-radius: 14px;
  --primary: #0d9488;
  --primary-hover: #0f766e;
  --primary-light: rgba(13, 148, 136, 0.08);
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --danger-light: rgba(220, 38, 38, 0.08);
  --text: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --input-border: #cbd5e1;
  --input-focus: #0d9488;
  --success: #059669;
  --warning: #d97706;
  --radius-sm: 8px;
  --radius-md: 10px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  font-size: 15px;
  line-height: 1.55;
  color: var(--text);
  background: var(--main-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Layout: sidebar + main */
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar {
  width: 280px;
  min-width: 280px;
  background: var(--sidebar-bg-solid);
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  padding: 28px 0;
  flex-shrink: 0;
  box-shadow: 4px 0 24px rgba(0,0,0,0.06);
}
.admin-sidebar .logo {
  padding: 0 24px 28px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.03em;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 20px;
}
.admin-sidebar .logo a { color: inherit; text-decoration: none; }
.admin-sidebar nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  margin: 0 12px;
  border-radius: var(--radius-md);
  color: var(--sidebar-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  transition: background 0.2s, color 0.2s;
}
.admin-sidebar nav a:hover { background: var(--sidebar-hover); color: #fff; }
.admin-sidebar nav a.active { background: var(--sidebar-active); color: #fff; font-weight: 600; }

/* 超管菜单：默认隐藏，仅当 applySuperAdminVisibility 确认为超管后加 .show-for-super-admin 再显示，避免非超管下闪一下 */
[data-super-admin-only] { display: none !important; }
[data-super-admin-only].show-for-super-admin { display: flex !important; }
[data-super-admin-only].show-for-super-admin.btn { display: inline-flex !important; }

/* Sidebar nav icons (mask so they inherit link color) */
.admin-sidebar .nav-icon {
  display: inline-block;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  background-color: currentColor;
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
}
.admin-sidebar .nav-icon-home {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M10 20v-6h4v6h5v-8h3L12 3 2 12h3v8h5z'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M10 20v-6h4v6h5v-8h3L12 3 2 12h3v8h5z'/%3E%3C/svg%3E");
}
.admin-sidebar .nav-icon-users {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M16 11c1.66 0 2.99-1.34 2.99-3S17.66 5 16 5c-1.66 0-3 1.34-3 3s1.34 3 3 3zm-8 0c1.66 0 2.99-1.34 2.99-3S9.66 5 8 5C6.34 5 5 6.34 5 8s1.34 3 3 3zm0 2c-2.33 0-7 1.17-7 3.5V19h14v-2.5c0-2.33-4.67-3.5-7-3.5zm8 0c-.29 0-.62.02-.97.05 1.16.84 1.97 1.97 1.97 3.45V19h6v-2.5c0-2.33-4.67-3.5-7-3.5z'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M16 11c1.66 0 2.99-1.34 2.99-3S17.66 5 16 5c-1.66 0-3 1.34-3 3s1.34 3 3 3zm-8 0c1.66 0 2.99-1.34 2.99-3S9.66 5 8 5C6.34 5 5 6.34 5 8s1.34 3 3 3zm0 2c-2.33 0-7 1.17-7 3.5V19h14v-2.5c0-2.33-4.67-3.5-7-3.5zm8 0c-.29 0-.62.02-.97.05 1.16.84 1.97 1.97 1.97 3.45V19h6v-2.5c0-2.33-4.67-3.5-7-3.5z'/%3E%3C/svg%3E");
}
.admin-sidebar .nav-icon-classrooms {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M12 3L1 9l4 2.18v6L12 21l7-3.82v-6l2-1.09V9L12 3zm6.82 6L12 12.72 5.18 9 12 5.28 18.82 9zM7 13.99l5 2.73 5-2.73v-3.72L12 15.44 7 11.72v3.72z'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M12 3L1 9l4 2.18v6L12 21l7-3.82v-6l2-1.09V9L12 3zm6.82 6L12 12.72 5.18 9 12 5.28 18.82 9zM7 13.99l5 2.73 5-2.73v-3.72L12 15.44 7 11.72v3.72z'/%3E%3C/svg%3E");
}
.admin-sidebar .nav-icon-schedule {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M11.99 2C6.47 2 2 6.48 2 12s4.47 10 9.99 10C17.52 22 22 17.52 22 12S17.52 2 11.99 2zM12 20c-4.42 0-8-3.58-8-8s3.58-8 8-8 8 3.58 8 8-3.58 8-8 8zm.5-13H11v6l5.25 3.15.75-1.23-4.5-2.67z'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M11.99 2C6.47 2 2 6.48 2 12s4.47 10 9.99 10C17.52 22 22 17.52 22 12S17.52 2 11.99 2zM12 20c-4.42 0-8-3.58-8-8s3.58-8 8-8 8 3.58 8 8-3.58 8-8 8zm.5-13H11v6l5.25 3.15.75-1.23-4.5-2.67z'/%3E%3C/svg%3E");
}
.admin-sidebar .nav-icon-events {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M17 12h-5v5h5v-5zM16 1v2H8V1H6v2H5c-1.11 0-1.99.9-1.99 2L4 19c0 1.1.89 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2h-1V1h-2zm3 18H5V8h14v11z'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M17 12h-5v5h5v-5zM16 1v2H8V1H6v2H5c-1.11 0-1.99.9-1.99 2L4 19c0 1.1.89 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2h-1V1h-2zm3 18H5V8h14v11z'/%3E%3C/svg%3E");
}
.admin-sidebar .nav-icon-video {
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M8 5v14l11-7z'/%3E%3Cpath d='M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8z'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M8 5v14l11-7z'/%3E%3Cpath d='M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8z'/%3E%3C/svg%3E");
}
.admin-main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.admin-header {
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  padding: 20px 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 1px 0 rgba(0,0,0,0.03);
}
.admin-header-left { display: flex; align-items: center; gap: 16px; }
.admin-header h1 { margin: 0; font-size: 22px; font-weight: 600; letter-spacing: -0.02em; color: var(--text); }
.admin-header .header-signout {
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s;
}
.admin-header .header-signout:hover { color: var(--primary); }
.admin-body { padding: 28px 36px 56px; flex: 1; }

/* Breadcrumb / back */
.breadcrumb { margin-bottom: 24px; }

/* Hint text under breadcrumb */
.admin-hint {
  margin: 0 0 20px;
  padding: 12px 16px;
  background: var(--primary-light);
  color: var(--primary-hover);
  border-radius: var(--radius-sm);
  font-size: 14px;
  line-height: 1.5;
}
.breadcrumb a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
}
.breadcrumb a:hover { text-decoration: underline; }

/* Search / filter bar above table */
.admin-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.admin-toolbar .search-input,
.admin-toolbar .filter-select,
.admin-toolbar select.filter-select,
.admin-toolbar input[type="date"].filter-select {
  height: 40px;
  padding: 0 14px;
  border: 1px solid var(--input-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  box-sizing: border-box;
  transition: border-color 0.2s;
}
.admin-toolbar .search-input {
  min-width: 220px;
  max-width: 360px;
}
.admin-toolbar .search-input:focus,
.admin-toolbar .filter-select:focus,
.admin-toolbar select.filter-select:focus,
.admin-toolbar input[type="date"].filter-select:focus {
  outline: none;
  border-color: var(--input-focus);
}
.admin-toolbar select.filter-select {
  min-width: 120px;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}
.admin-toolbar input[type="date"].filter-select {
  min-width: 150px;
  cursor: pointer;
}
.admin-toolbar .toolbar-hint {
  font-size: 13px;
  color: var(--text-muted);
}
.admin-toolbar label.toolbar-hint {
  margin: 0;
  font-weight: 500;
}

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  padding: 28px;
  margin-bottom: 28px;
  border: 1px solid rgba(0,0,0,0.04);
  transition: box-shadow 0.2s, border-color 0.2s;
}
.card:hover { box-shadow: var(--card-shadow-hover); }
.card-title { margin: 0 0 24px; font-size: 18px; font-weight: 600; letter-spacing: -0.02em; color: var(--text); }

/* Tables */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  background: var(--card-bg);
  border: 1px solid rgba(0,0,0,0.04);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
th, td { padding: 16px 22px; text-align: left; border-bottom: 1px solid var(--border); }
th {
  background: #f8fafc;
  font-weight: 600;
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
tr:last-child td { border-bottom: none; }
tbody tr { transition: background 0.15s; }
tbody tr:hover td { background: var(--primary-light); }
tbody td { vertical-align: middle; }

/* User list avatar */
.avatar-cell {
  width: 52px;
  padding-right: 12px;
  white-space: nowrap;
}
.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  display: inline-block;
  vertical-align: middle;
}
.user-avatar-default {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-light);
  vertical-align: middle;
}
.user-avatar-default-icon {
  width: 20px;
  height: 20px;
  background-color: var(--primary);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M12 12c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm0 2c-2.67 0-8 1.34-8 4v2h16v-2c0-2.66-5.33-4-8-4z'/%3E%3C/svg%3E") center/contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M12 12c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm0 2c-2.67 0-8 1.34-8 4v2h16v-2c0-2.66-5.33-4-8-4z'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.05s, box-shadow 0.2s;
}
.btn:active { transform: scale(0.98); }
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(13, 148, 136, 0.3);
}
.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 4px 12px rgba(13, 148, 136, 0.35);
}
.btn-danger {
  background: var(--danger);
  color: #fff;
}
.btn-danger:hover { background: var(--danger-hover); }
.btn-secondary {
  background: #f1f5f9;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: #e2e8f0; border-color: #cbd5e1; }
.btn-sm { padding: 8px 16px; font-size: 13px; }
.actions-inline { display: flex; gap: 10px; flex-wrap: wrap; }

/* Forms */
.form-group { margin-bottom: 22px; }
.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text);
  font-size: 14px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--input-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
  background-color: #fff;
}
.form-group select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  padding-right: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  cursor: pointer;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--input-focus);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.12);
}
.form-group input.readonly-input {
  background: var(--main-bg);
  color: var(--text-muted);
  cursor: default;
}

/* 时间框：部分浏览器右侧有图标，预留空间避免遮挡时间文字 */
input[type="time"] {
  min-width: 120px;
  padding-right: 36px;
  box-sizing: border-box;
}

.form-group textarea { min-height: 100px; resize: vertical; }

/* Toggle switch (Has teacher) */
.form-group-switch { margin-bottom: 20px; }
.switch-label {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  font-weight: 500;
  font-size: 14px;
  line-height: 24px;
  color: var(--text);
  min-height: 24px;
}
.switch-label input[type="checkbox"] {
  position: absolute;
  width: 0;
  height: 0;
  opacity: 0;
}
.switch-slider {
  display: inline-flex;
  align-items: center;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
  background: var(--input-border);
  border-radius: 12px;
  position: relative;
  transition: background 0.2s;
  vertical-align: middle;
}
.switch-slider::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  left: 2px;
  top: 2px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
  transition: transform 0.2s;
}
.switch-label input:checked + .switch-slider {
  background: var(--primary);
}
.switch-label input:checked + .switch-slider::after {
  transform: translateX(20px);
}
.switch-text {
  user-select: none;
  line-height: 24px;
  vertical-align: middle;
}

.form-group input[type="file"] {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--text-muted);
}
.form-group small { display: block; margin-top: 6px; font-size: 12px; color: var(--text-muted); }
.form-actions { margin-top: 28px; display: flex; gap: 14px; }

/* Modal */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 24px;
  overflow-y: auto;
}
.modal.show { display: flex; }
.modal-content {
  background: var(--card-bg);
  border-radius: var(--card-radius);
  box-shadow: 0 24px 64px rgba(0,0,0,0.18);
  padding: 32px;
  max-width: 520px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  border: 1px solid rgba(0,0,0,0.06);
}
.modal-content h2 { margin: 0 0 24px; font-size: 20px; font-weight: 600; letter-spacing: -0.02em; }

/* Map container + zoom slider */
.map-zoom-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}
.map-zoom-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  min-width: 36px;
}
.map-zoom-slider {
  flex: 1;
  min-width: 0;
  height: 8px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border);
  border-radius: 4px;
}
.map-zoom-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: 2px solid #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.map-zoom-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: 2px solid #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.map-container {
  width: 100%;
  height: 320px;
  background: #f1f5f9;
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.map-container.no-key {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 14px;
}
.map-hint { font-size: 13px; color: var(--text-muted); margin-bottom: 12px; }

/* Status badges */
.badge { display: inline-block; padding: 5px 12px; border-radius: 20px; font-size: 12px; font-weight: 500; }
.badge-success { background: #d1fae5; color: var(--success); }
.badge-danger { background: #fee2e2; color: var(--danger); }
.badge-info { background: #e0f2fe; color: #0284c7; }
.badge-warning { background: #fef3c7; color: #b45309; }

/* Welcome video page */
.video-preview-wrap { margin-top: 24px; }
.video-preview-wrap video {
  width: 100%;
  max-width: 560px;
  border-radius: var(--radius-md);
  background: #000;
  margin-top: 10px;
  border: 1px solid var(--border);
}
.empty-state { text-align: center; padding: 56px 28px; color: var(--text-muted); font-size: 15px; }
.text-muted { color: var(--text-muted); }

/* Weekday tabs */
.weekday-tabs { display: flex; gap: 10px; margin-bottom: 24px; flex-wrap: wrap; }
.weekday-tabs button {
  padding: 12px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--card-bg);
  font-weight: 500;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  color: var(--text);
}
.weekday-tabs button:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.weekday-tabs button.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Toast (success/error message, no alert) */
.admin-toast {
  position: fixed;
  left: 50%;
  top: 24px;
  transform: translateX(-50%) translateY(-100px);
  padding: 14px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 10px 40px rgba(0,0,0,0.15);
  z-index: 10000;
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
  pointer-events: none;
  max-width: 90%;
}
.admin-toast--show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}
.admin-toast--success {
  background: var(--success);
  color: #fff;
}
.admin-toast--error {
  background: var(--danger);
  color: #fff;
}

/* Confirm dialog (no system confirm) */
.admin-confirm-wrap {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  transition: opacity 0.2s ease;
}
.admin-confirm-wrap--show {
  opacity: 1;
}
.admin-confirm-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  cursor: pointer;
}
.admin-confirm-box {
  position: relative;
  background: var(--card-bg);
  border-radius: var(--card-radius);
  box-shadow: 0 24px 64px rgba(0,0,0,0.18);
  padding: 28px 32px;
  max-width: 400px;
  width: 100%;
  transform: scale(0.95);
  transition: transform 0.2s ease;
}
.admin-confirm-wrap--show .admin-confirm-box {
  transform: scale(1);
}
.admin-confirm-message {
  margin: 0 0 24px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text);
}
.admin-confirm-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* Searchable select (e.g. classroom picker) */
.search-select-wrap {
  position: relative;
  width: 100%;
}
.search-select-input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--input-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.search-select-input:focus {
  outline: none;
  border-color: var(--input-focus);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.12);
}
.search-select-input::placeholder {
  color: var(--text-muted);
}
.search-select-dropdown {
  display: none;
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  margin-top: 4px;
  max-height: 220px;
  overflow-y: auto;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 40px rgba(0,0,0,0.12);
  z-index: 100;
}
.search-select-dropdown.show {
  display: block;
}
.search-select-option {
  display: block;
  width: 100%;
  padding: 10px 14px;
  text-align: left;
  border: none;
  background: none;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s;
}
.search-select-option:hover {
  background: var(--primary-light);
}
.search-select-option.empty-option {
  color: var(--text-muted);
  font-style: italic;
}
.search-select-option.no-results {
  color: var(--text-muted);
  cursor: default;
  font-style: italic;
}
.search-select-option.no-results:hover {
  background: none;
}

/* 富文本选项：多行（教室号/名/类型 + 教师） */
.search-select-option--rich {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  text-align: left;
}
.search-select-option-line {
  display: block;
  font-weight: 500;
}
.search-select-option-meta {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 400;
}