/* 班级管理系统 · 版权所有 严禁盗用 · (c) changledaa 2025–2026 */
/* ============================================================
   班级管理系统 — Jade & Ink 设计系统
   中国书院美学 × 现代玻璃态融合
   ============================================================ */

/* ----- CSS Variables / Design Tokens ----- */
:root {
  /* Palette: Jade & Ink */
  --bg: #f5f0eb;
  --card-bg: rgba(255, 255, 255, 0.72);
  --card-bg-solid: #fdfdfc;
  --primary: #2d4a7a;
  --primary-dark: #1e3460;
  --primary-light: #e8edf5;
  --accent: #c43a31;
  --success: #3d8b6c;
  --success-light: #e8f5ef;
  --warning: #b8860b;
  --warning-light: #fdf8ed;
  --danger: #c43a31;
  --danger-light: #fdf0ee;
  --text: #1a1a1a;
  --text-secondary: #6b5e53;
  --text-muted: #9c9188;
  --border: #d9d0c5;
  --border-light: #ede7df;

  /* Spacing & Radius */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Shadows — warm, soft */
  --shadow-sm: 0 1px 2px rgba(60, 40, 20, 0.04);
  --shadow: 0 1px 4px rgba(60, 40, 20, 0.05), 0 1px 2px rgba(60, 40, 20, 0.03);
  --shadow-md: 0 4px 12px rgba(60, 40, 20, 0.06), 0 2px 4px rgba(60, 40, 20, 0.04);
  --shadow-lg: 0 8px 24px rgba(60, 40, 20, 0.08), 0 4px 8px rgba(60, 40, 20, 0.04);
  --shadow-xl: 0 16px 48px rgba(60, 40, 20, 0.12), 0 6px 16px rgba(60, 40, 20, 0.06);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --font-serif: Georgia, 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', 'Times New Roman', serif;
  --font-mono: 'SF Mono', 'Cascadia Code', 'JetBrains Mono', 'Consolas', 'Monaco', monospace;

  /* Transitions */
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Glass */
  --glass-blur: 16px;
  --glass-border: 1px solid rgba(255, 255, 255, 0.55);
  --glass-border-strong: 1px solid rgba(255, 255, 255, 0.7);
}

/* ----- Reset ----- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body {
  font-family: var(--font-sans);
  background:
    radial-gradient(ellipse at 20% 10%, rgba(61, 139, 108, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 90%, rgba(45, 74, 122, 0.04) 0%, transparent 50%),
    var(--bg);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ----- Typography ----- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--text);
  letter-spacing: -0.01em;
}
h1 { font-size: 1.75rem; font-weight: 700; }
h2 { font-size: 1.4rem; font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 700; }
h4 { font-size: 1rem; font-weight: 600; }
a { color: var(--primary); text-decoration: none; transition: var(--transition-fast); }
a:hover { color: var(--accent); text-decoration: none; }

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 20px;
  border-radius: var(--radius-full);
  border: var(--glass-border-strong);
  background: var(--card-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
  font-family: inherit;
  letter-spacing: 0.01em;
  position: relative;
  box-shadow: var(--shadow-sm);
}
.btn:hover {
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  text-decoration: none;
  color: var(--text);
}
.btn:active {
  transform: scale(0.97) translateY(0);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fast);
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border: 1px solid var(--primary-dark);
  box-shadow: 0 2px 8px rgba(45, 74, 122, 0.25);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(45, 74, 122, 0.35);
  color: #fff;
}
.btn-primary:active {
  background: #162a4a;
  transform: scale(0.97) translateY(0);
}
.btn-danger {
  background: var(--danger);
  color: #fff;
  border: 1px solid #a8322a;
  box-shadow: 0 2px 8px rgba(196, 58, 49, 0.25);
}
.btn-danger:hover {
  background: #a8322a;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(196, 58, 49, 0.35);
  color: #fff;
}
.btn-success {
  background: var(--success);
  color: #fff;
  border: 1px solid #2f6d54;
  box-shadow: 0 2px 8px rgba(61, 139, 108, 0.25);
}
.btn-success:hover {
  background: #2f6d54;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(61, 139, 108, 0.35);
  color: #fff;
}
.btn-warning {
  background: var(--warning);
  color: #fff;
  border: 1px solid #9a6f0a;
  box-shadow: 0 2px 8px rgba(184, 134, 11, 0.25);
}
.btn-warning:hover {
  background: #9a6f0a;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(184, 134, 11, 0.35);
  color: #fff;
}
.btn-outline {
  background: transparent;
  border: 1.5px solid var(--border);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  box-shadow: none;
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.5);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.btn-sm { padding: 5px 14px; font-size: 0.75rem; }
.btn-xs { padding: 3px 10px; font-size: 0.7rem; border-radius: var(--radius-full); }
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
  pointer-events: none;
}

/* ----- Cards / Panels (玻璃态核心) ----- */
.card {
  background: var(--card-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  border: var(--glass-border);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: all var(--transition);
  position: relative;
}
.card:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 255, 255, 0.7);
  transform: translateY(-2px);
}
.panel {
  background: var(--card-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: var(--glass-border);
  overflow: hidden;
}
.panel-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  font-weight: 700;
  font-size: 0.9rem;
  font-family: var(--font-serif);
  letter-spacing: 0.02em;
}
.panel-body { padding: 14px 18px; }

/* ----- Forms ----- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 1rem;
}
.form-group label {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-family: inherit;
  background: var(--card-bg);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: all var(--transition);
  color: var(--text);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(45, 74, 122, 0.1), 0 2px 8px rgba(45, 74, 122, 0.06);
}
.form-group textarea { resize: vertical; min-height: 80px; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}
select {
  padding: 9px 14px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border);
  font-size: 0.85rem;
  background: var(--card-bg);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: all var(--transition);
  font-family: inherit;
  color: var(--text);
  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 d='M6 8L1 3h10z' fill='%236b5e53'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 34px;
}
select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(45, 74, 122, 0.1);
}
input[type="text"],
input[type="password"],
input[type="tel"],
input[type="date"],
input[type="search"] {
  padding: 10px 14px;
  border-radius: var(--radius);
  border: 1.5px solid var(--border);
  font-size: 0.9rem;
  font-family: inherit;
  background: var(--card-bg);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: all var(--transition);
  color: var(--text);
}
input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(45, 74, 122, 0.1);
}
input::placeholder,
textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}

/* ----- Tables ----- */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: var(--glass-border);
  box-shadow: var(--shadow-sm);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
table th {
  text-align: left;
  padding: 12px 14px;
  background: rgba(45, 74, 122, 0.06);
  font-weight: 700;
  font-family: var(--font-serif);
  color: var(--primary);
  border-bottom: 2px solid rgba(45, 74, 122, 0.15);
  white-space: nowrap;
  letter-spacing: 0.02em;
  font-size: 0.8rem;
  text-transform: uppercase;
}
table td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--border-light);
  vertical-align: middle;
}
table tbody tr {
  transition: background var(--transition-fast);
}
table tbody tr:nth-child(even) {
  background: rgba(245, 240, 235, 0.4);
}
table tbody tr:hover {
  background: rgba(45, 74, 122, 0.04);
}

/* ----- Badges / Tags ----- */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.badge-admin { background: #e8edf5; color: #2d4a7a; }
.badge-teacher { background: #e8f5ef; color: #2f6d54; }
.badge-homeroom { background: #e8edf5; color: #1e3460; }
.badge-student { background: #fdf0ee; color: #a8322a; }
.badge-parent { background: #f0edf5; color: #4a3d7a; }
.badge-grade { background: #fdf0f5; color: #8a3d6c; }
.badge-class-admin { background: #fdf8ed; color: #9a6f0a; }
.badge-default { background: var(--border-light); color: var(--text-secondary); }
.role-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
}
.class-tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
}

/* ----- Header ----- */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--border-light);
}
.page-header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  color: var(--primary);
}

/* ----- Capsule Dialogs (pill-shaped popups) ----- */
.capsule-dialog-overlay {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(15,12,10,0.35);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  z-index: 2000; display: flex; align-items: center; justify-content: center;
  animation: modalFadeIn 0.2s ease;
}
.capsule-dialog {
  background: var(--card-bg);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-xl);
  width: 380px; max-width: 90vw;
  padding: 28px 28px 24px;
  box-shadow: var(--shadow-xl);
  border: var(--glass-border-strong);
  text-align: center;
  animation: capsulePopIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes capsulePopIn {
  from { opacity: 0; transform: scale(0.9) translateY(16px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.capsule-dialog-icon {
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; margin: 0 auto 12px;
}
.capsule-dialog h4 {
  font-size: 1rem; font-weight: 700; margin-bottom: 8px;
  color: var(--text); font-family: var(--font-sans);
}
.capsule-dialog p {
  font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 16px;
  line-height: 1.5;
}
.capsule-input {
  width: 100%; padding: 10px 16px;
  border: 2px solid var(--border); border-radius: var(--radius-full);
  font-size: 0.9rem; font-family: inherit; background: var(--card-bg);
  color: var(--text); margin-bottom: 16px; outline: none;
  transition: border-color 0.2s;
}
.capsule-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(45,74,122,0.08); }
.capsule-dialog-btns { display: flex; gap: 10px; justify-content: center; }
.capsule-btn {
  flex: 1; padding: 10px 20px; border-radius: var(--radius-full);
  font-size: 0.85rem; font-weight: 600; cursor: pointer;
  border: none; transition: all 0.2s; font-family: inherit;
}
.capsule-btn-cancel {
  background: var(--border-light); color: var(--text-secondary);
}
.capsule-btn-cancel:hover { background: var(--border); color: var(--text); }
.capsule-btn-confirm {
  background: var(--primary); color: #fff;
  box-shadow: 0 2px 8px rgba(45,74,122,0.2);
}
.capsule-btn-confirm:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 16px rgba(45,74,122,0.3);
  transform: translateY(-1px);
}

/* ----- Modal (frosted overlay) ----- */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(30, 25, 20, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  animation: modalFadeIn 0.2s ease;
}
@keyframes modalFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.modal-card {
  background: var(--card-bg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-radius: var(--radius-xl);
  width: 92%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 2rem;
  box-shadow: var(--shadow-xl);
  border: var(--glass-border-strong);
  animation: modalSlideUp 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes modalSlideUp {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-light);
}
.modal-header h3 {
  font-size: 1.15rem;
  font-weight: 700;
  font-family: var(--font-serif);
  color: var(--primary);
}
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 1.2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
}
.close-modal {
  background: var(--border-light);
  border: none;
  font-size: 1.1rem;
  cursor: pointer;
  color: var(--text-muted);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  line-height: 1;
}
.close-modal:hover {
  background: rgba(196, 58, 49, 0.12);
  color: var(--accent);
  transform: rotate(90deg);
}

/* ----- Stats Row ----- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 1.5rem;
}
.stat-card {
  background: var(--card-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  box-shadow: var(--shadow);
  border: var(--glass-border);
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all var(--transition);
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.stat-icon {
  font-size: 22px;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  flex-shrink: 0;
  transition: transform var(--transition-spring);
}
.stat-card:hover .stat-icon {
  transform: scale(1.08);
}
.stat-icon.blue { background: var(--primary-light); color: var(--primary); }
.stat-icon.red { background: var(--danger-light); color: var(--danger); }
.stat-icon.amber { background: var(--warning-light); color: var(--warning); }
.stat-icon.green { background: var(--success-light); color: var(--success); }
.stat-value {
  font-size: 1.6rem;
  font-weight: 800;
  font-family: var(--font-serif);
  color: var(--text);
  letter-spacing: -0.02em;
}
.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ----- Toast (bottom-center pill) ----- */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  background: rgba(26, 26, 26, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  color: #fff;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 500;
  z-index: 1100;
  opacity: 0;
  transition: all var(--transition-spring);
  pointer-events: none;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.15);
  letter-spacing: 0.01em;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

/* ----- Section Label ----- */
.section-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin: 1.2rem 0 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
  font-family: var(--font-sans);
}
.section-label:first-child { border-top: none; margin-top: 0; padding-top: 0; }

/* ----- Tab Navigation ----- */
.tab-nav { display: flex; gap: 6px; margin-bottom: 1rem; }
.tab-btn {
  padding: 7px 18px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border);
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  transition: all var(--transition);
  font-family: inherit;
  color: var(--text-secondary);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.tab-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(255, 255, 255, 0.75);
}
.tab-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 2px 8px rgba(45, 74, 122, 0.3);
}
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ----- Empty State ----- */
.empty-state {
  text-align: center;
  padding: 2.5rem 2rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.empty-state i {
  font-size: 2.2rem;
  margin-bottom: 12px;
  display: block;
  color: var(--border);
}

/* ----- Loading ----- */
.loading {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ----- Flex Utilities ----- */
.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.flex-center { display: flex; align-items: center; gap: 8px; }
.flex-wrap { display: flex; flex-wrap: wrap; gap: 8px; }

/* ----- Two Column Layout ----- */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* ----- Action Icons ----- */
.action-icons { display: flex; gap: 6px; }
.action-icons i,
.action-icons button {
  cursor: pointer;
  color: var(--text-muted);
  transition: all var(--transition-fast);
  padding: 6px 8px;
  border-radius: var(--radius-full);
  background: none;
  border: none;
  font-size: 0.95rem;
  line-height: 1;
}
.action-icons i:hover,
.action-icons button:hover {
  color: var(--primary);
  background: rgba(45, 74, 122, 0.08);
}
.action-icons .delete-icon:hover,
.action-icons .delete-btn:hover {
  color: var(--danger);
  background: rgba(196, 58, 49, 0.08);
}

/* ----- Multi Select Checkboxes ----- */
.perm-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.perm-group label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
  cursor: pointer;
  background: var(--border-light);
  padding: 7px 16px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
}
.perm-group label:hover {
  background: var(--primary-light);
  color: var(--primary);
}
.perm-group input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--primary);
}

/* ----- Class Selector / Filter Bar ----- */
.class-selector,
.filter-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.filter-bar {
  background: var(--card-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  padding: 10px 18px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow);
  border: var(--glass-border);
}

/* ----- Sidebar Layout ----- */
.sidebar-layout { display: flex; height: 100vh; overflow: hidden; }
.sidebar {
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-right: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 10;
  overflow-y: auto;
  width: 260px;
}
.sidebar-header {
  padding: 1.3rem 1.2rem;
  border-bottom: 1px solid var(--border-light);
  font-weight: 700;
  font-size: 0.95rem;
  font-family: var(--font-serif);
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
}
.sidebar-header i { color: var(--primary); }
.sidebar-nav { flex: 1; padding: 0.5rem 0; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 1.2rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
  border-left: 3px solid transparent;
  font-size: 0.82rem;
  font-weight: 500;
  margin: 2px 0;
}
.nav-item:hover {
  background: rgba(45, 74, 122, 0.05);
  color: var(--primary);
}
.nav-item.active {
  background: var(--primary-light);
  color: var(--primary);
  border-left-color: var(--primary);
  font-weight: 700;
}
.nav-item i { width: 18px; text-align: center; font-size: 0.9rem; }
.nav-group-header {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 1.2rem; cursor: pointer;
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.5px;
  color: var(--text-muted); text-transform: uppercase;
  user-select: none; transition: all var(--transition-fast);
  border-bottom: 1px solid transparent;
}
.nav-group-header:hover { color: var(--primary); }
.nav-group-header .arrow { font-size: 0.55rem; transition: transform 0.2s; margin-left: auto; }
.nav-group-header.collapsed .arrow { transform: rotate(-90deg); }
.nav-group-body { overflow: hidden; }
.nav-group-body.collapsed { display: none; }
.nav-group-body .nav-item { padding-left: 2.2rem; }
.sidebar-layout .main-content {
  margin-left: 260px;
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem 2rem;
}

/* ----- Position Tags ----- */
.pos-tags { display: flex; flex-wrap: wrap; gap: 3px; }
.pos-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.68rem;
  font-weight: 600;
  white-space: nowrap;
  letter-spacing: 0.02em;
}
.pos-tag.c0 { background: #e8edf5; color: #2d4a7a; }
.pos-tag.c1 { background: #fdf8ed; color: #9a6f0a; }
.pos-tag.c2 { background: #e8f5ef; color: #2f6d54; }
.pos-tag.c3 { background: #fdf0f5; color: #8a3d6c; }
.pos-tag.c4 { background: #f0edf5; color: #4a3d7a; }

/* ----- User Info Chips ----- */
.info-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--border-light);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}
.info-chip i { color: var(--text-muted); }
.user-tag {
  background: var(--primary-light);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
}

/* ----- Search ----- */
.search-box { display: flex; gap: 8px; align-items: center; }
.search-results { max-height: 300px; overflow-y: auto; }
.search-result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 11px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  margin-bottom: 6px;
  transition: all var(--transition-fast);
  background: rgba(255, 255, 255, 0.45);
}
.search-result-item:hover {
  background: rgba(45, 74, 122, 0.04);
  border-color: var(--primary-light);
}

/* ----- Section Divider ----- */
.section-divider {
  border: none;
  border-top: 2px dashed var(--border);
  margin: 1.5rem 0;
}

/* ----- Container ----- */
.container { max-width: 1400px; margin: 0 auto; padding: 2rem; }

/* ----- Insight Row ----- */
.insight-row {
  background: var(--card-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-radius: var(--radius-lg);
  padding: 14px 18px;
  border: var(--glass-border);
  margin-bottom: 0.75rem;
  transition: all var(--transition-fast);
}
.insight-row:hover {
  box-shadow: var(--shadow-md);
}

/* ----- Announcement Bar ----- */
.announcement-bar {
  background: var(--primary-light);
  color: var(--primary);
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  border: 1px solid rgba(45, 74, 122, 0.1);
}

/* ----- Login Overlay ----- */
.login-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

/* ----- Dashboard Header ----- */
.dashboard .header {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* ----- Scrollbar Styling ----- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ----- Responsive ----- */
@media (max-width: 800px) {
  .two-col { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .sidebar { position: relative; width: 100%; height: auto; }
  .sidebar-layout .main-content { margin-left: 0 !important; padding: 1rem; }
  .filter-bar { border-radius: var(--radius); }
}
@media (max-width: 700px) {
  body { padding: 0; }
  .container { padding: 1rem; }
}

/* ═══════════════════════════════════════════════════════════════
   Multi-Theme System — 7 Distinctive Themes
   data-theme="elegant|simple|minimal|luxury|cyber|light|dark"
   Default (:root) = elegant (优雅)
   ═══════════════════════════════════════════════════════════════ */

/* ── 1. 简洁 Simple — Warm sage, soft & calming ────── */
[data-theme="simple"] {
  --bg: #f7f5f0;
  --card-bg: rgba(255,255,255,0.9);
  --card-bg-solid: #fefefc;
  --primary: #6a9b85;
  --primary-dark: #4d7a65;
  --primary-light: #edf5f1;
  --accent: #d4786e;
  --success: #6a9b85;
  --success-light: #edf5f1;
  --warning: #c4944a;
  --warning-light: #fdf6ed;
  --danger: #d4786e;
  --danger-light: #fdf2f1;
  --text: #3d3530;
  --text-secondary: #7a7068;
  --text-muted: #a89888;
  --border: #e5ddd4;
  --border-light: #f0ebe4;
  --shadow-sm: 0 1px 2px rgba(80,60,40,0.03);
  --shadow: 0 1px 4px rgba(80,60,40,0.04);
  --shadow-md: 0 3px 10px rgba(80,60,40,0.05);
  --shadow-lg: 0 6px 20px rgba(80,60,40,0.07);
  --shadow-xl: 0 12px 40px rgba(80,60,40,0.10);
  --glass-border: 1px solid rgba(255,255,255,0.75);
  --glass-border-strong: 1px solid rgba(255,255,255,0.9);
  --radius: 10px; --radius-lg: 14px; --radius-xl: 20px; --radius-full: 9999px;
}
[data-theme="simple"] body { background: var(--bg); background-attachment: fixed; }
[data-theme="simple"] .card, [data-theme="simple"] .panel { backdrop-filter: none; -webkit-backdrop-filter: none; border: 1px solid var(--border-light); }
[data-theme="simple"] .btn { backdrop-filter: none; -webkit-backdrop-filter: none; }
[data-theme="simple"] h1, [data-theme="simple"] h2, [data-theme="simple"] h3 { font-family: var(--font-sans); }
[data-theme="simple"] .stat-card { border-top: 3px solid var(--primary); }
[data-theme="simple"] .btn-primary { box-shadow: 0 2px 8px rgba(106,155,133,0.25); }
[data-theme="simple"] .btn-primary:hover { box-shadow: 0 6px 20px rgba(106,155,133,0.35); }
[data-theme="simple"] table th { background: var(--primary-light); color: var(--primary); }
[data-theme="simple"] .sidebar { background: rgba(255,255,255,0.85); backdrop-filter: none; -webkit-backdrop-filter: none; }

/* ── 2. 优雅 Elegant (default :root) — No overrides ─── */

/* ── 3. 极简 Minimal — Pure monochrome, razor sharp ─── */
[data-theme="minimal"] {
  --bg: #fafafa;
  --card-bg: #ffffff;
  --card-bg-solid: #ffffff;
  --primary: #1a1a1a;
  --primary-dark: #000;
  --primary-light: #f0f0f0;
  --accent: #e03131;
  --success: #1a1a1a;
  --success-light: #f0f0f0;
  --warning: #5c5c5c;
  --warning-light: #fafafa;
  --danger: #e03131;
  --danger-light: #fff5f5;
  --text: #1a1a1a;
  --text-secondary: #5c5c5c;
  --text-muted: #999;
  --border: #e8e8e8;
  --border-light: #f2f2f2;
  --shadow-sm: none;
  --shadow: none;
  --shadow-md: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-lg: 0 2px 6px rgba(0,0,0,0.06);
  --shadow-xl: 0 4px 14px rgba(0,0,0,0.08);
  --glass-border: 1px solid #e8e8e8;
  --glass-border-strong: 1px solid #d4d4d4;
  --radius-sm: 2px; --radius: 3px; --radius-lg: 4px; --radius-xl: 6px; --radius-full: 3px;
  --font-serif: var(--font-sans);
  --transition: 0.12s ease; --transition-spring: 0.15s ease;
}
[data-theme="minimal"] body { background: #fafafa; background-attachment: fixed; }
[data-theme="minimal"] *, [data-theme="minimal"] *::before, [data-theme="minimal"] *::after {
  backdrop-filter: none !important; -webkit-backdrop-filter: none !important;
}
[data-theme="minimal"] .card, [data-theme="minimal"] .panel, [data-theme="minimal"] .stat-card { background: #fff; border: 1px solid #e8e8e8; box-shadow: none; }
[data-theme="minimal"] .card:hover, [data-theme="minimal"] .stat-card:hover { transform: none; border-color: #1a1a1a; box-shadow: none; }
[data-theme="minimal"] .btn { background: #fff; border: 1px solid #d4d4d4; color: #1a1a1a; border-radius: 3px; box-shadow: none; }
[data-theme="minimal"] .btn:hover { background: #f5f5f5; border-color: #1a1a1a; transform: none; box-shadow: none; }
[data-theme="minimal"] .btn-primary { background: #1a1a1a; color: #fff; border-color: #1a1a1a; }
[data-theme="minimal"] .btn-primary:hover { background: #333; border-color: #333; }
[data-theme="minimal"] h1, [data-theme="minimal"] h2, [data-theme="minimal"] h3 { font-family: var(--font-sans); font-weight: 600; letter-spacing: -0.02em; }
[data-theme="minimal"] table th { background: #fafafa; color: #1a1a1a; font-weight: 600; text-transform: none; letter-spacing: 0; }
[data-theme="minimal"] table td { border-bottom: 1px solid #f0f0f0; }
[data-theme="minimal"] .tab-btn { border-radius: 3px; }
[data-theme="minimal"] .tab-btn.active { background: #1a1a1a; color: #fff; }
[data-theme="minimal"] .sidebar { background: #fff; border-right: 1px solid #e8e8e8; }
[data-theme="minimal"] .nav-item.active { background: #1a1a1a; color: #fff; border-left-color: #1a1a1a; }
[data-theme="minimal"] .stat-card { border-top: 2px solid #1a1a1a; }

/* ── 4. 豪华 Luxury — Deep navy + gold, premium ────── */
[data-theme="luxury"] {
  --bg: #0c1424;
  --card-bg: rgba(18,25,44,0.85);
  --card-bg-solid: #12192c;
  --primary: #d4a853;
  --primary-dark: #b8922e;
  --primary-light: rgba(212,168,83,0.1);
  --accent: #c0483c;
  --success: #5a9e7c;
  --success-light: rgba(90,158,124,0.12);
  --warning: #d4a853;
  --warning-light: rgba(212,168,83,0.12);
  --danger: #c0483c;
  --danger-light: rgba(192,72,60,0.12);
  --text: #e2d9c5;
  --text-secondary: #b0a58c;
  --text-muted: #7a6f58;
  --border: #1e2a40;
  --border-light: #162032;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow: 0 2px 8px rgba(0,0,0,0.35);
  --shadow-md: 0 4px 18px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.45);
  --shadow-xl: 0 16px 56px rgba(0,0,0,0.55);
  --glass-border: 1px solid rgba(212,168,83,0.1);
  --glass-border-strong: 1px solid rgba(212,168,83,0.18);
  --font-serif: Georgia,'Noto Serif SC','Songti SC',serif;
  --radius: 10px; --radius-lg: 16px; --radius-xl: 24px; --radius-full: 9999px;
}
[data-theme="luxury"] body {
  background: linear-gradient(180deg, #0c1424 0%, #101a2e 50%, #0c1424 100%);
  background-attachment: fixed; min-height: 100vh;
}
[data-theme="luxury"] .card, [data-theme="luxury"] .panel {
  border: 1px solid rgba(212,168,83,0.12);
  box-shadow: 0 2px 14px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.015);
}
[data-theme="luxury"] .card:hover { border-color: rgba(212,168,83,0.3); box-shadow: 0 8px 36px rgba(0,0,0,0.45), 0 0 24px rgba(212,168,83,0.04); }
[data-theme="luxury"] .btn-primary {
  background: linear-gradient(135deg, #d4a853, #b8922e); color: #0c1424;
  border: 1px solid #d4a853; font-weight: 700; letter-spacing: 0.03em;
  box-shadow: 0 2px 14px rgba(212,168,83,0.25);
}
[data-theme="luxury"] .btn-primary:hover { box-shadow: 0 6px 28px rgba(212,168,83,0.4); transform: translateY(-2px); }
[data-theme="luxury"] table th { background: rgba(212,168,83,0.06); color: #d4a853; letter-spacing: 0.04em; }
[data-theme="luxury"] .stat-card { border-top: 2px solid rgba(212,168,83,0.4); }
[data-theme="luxury"] .sidebar { background: rgba(12,20,36,0.95); border-right: 1px solid rgba(212,168,83,0.08); }
[data-theme="luxury"] .nav-item.active { background: rgba(212,168,83,0.1); border-left-color: #d4a853; color: #d4a853; }

/* ── 5. 炫酷 Cyber — Neon cyberpunk, monospace ─────── */
[data-theme="cyber"] {
  --bg: #06060f;
  --card-bg: rgba(10,10,30,0.82);
  --card-bg-solid: #0a0a1e;
  --primary: #00f0ff;
  --primary-dark: #00c4d6;
  --primary-light: rgba(0,240,255,0.08);
  --accent: #ff2d55;
  --success: #39ff14;
  --success-light: rgba(57,255,20,0.08);
  --warning: #ffb800;
  --warning-light: rgba(255,184,0,0.08);
  --danger: #ff2d55;
  --danger-light: rgba(255,45,85,0.08);
  --text: #d8dcff;
  --text-secondary: #8890c8;
  --text-muted: #505888;
  --border: #181840;
  --border-light: #101030;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.5);
  --shadow: 0 2px 8px rgba(0,0,0,0.55);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.6);
  --shadow-lg: 0 8px 30px rgba(0,240,255,0.06);
  --shadow-xl: 0 16px 56px rgba(0,240,255,0.1);
  --glass-border: 1px solid rgba(0,240,255,0.08);
  --glass-border-strong: 1px solid rgba(0,240,255,0.15);
  --font-sans: 'SF Mono','Cascadia Code','JetBrains Mono','Consolas',monospace;
  --font-mono: 'SF Mono','Cascadia Code','JetBrains Mono',monospace;
  --radius: 1px; --radius-lg: 2px; --radius-xl: 4px; --radius-full: 2px;
  --transition: 0.1s ease; --transition-spring: 0.15s ease;
}
[data-theme="cyber"] body {
  background: var(--bg);
  background-image: linear-gradient(rgba(0,240,255,0.015) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(0,240,255,0.015) 1px, transparent 1px);
  background-size: 40px 40px; background-attachment: fixed;
}
[data-theme="cyber"] .card, [data-theme="cyber"] .panel {
  border: 1px solid rgba(0,240,255,0.1);
  box-shadow: 0 0 12px rgba(0,240,255,0.03), var(--shadow);
  clip-path: polygon(0 4px, 4px 0, 100% 0, 100% calc(100% - 4px), calc(100% - 4px) 100%, 0 100%);
}
[data-theme="cyber"] .card:hover { border-color: rgba(0,240,255,0.25); box-shadow: 0 0 28px rgba(0,240,255,0.08), 0 8px 24px rgba(0,0,0,0.5); }
[data-theme="cyber"] .btn-primary {
  background: transparent; color: #00f0ff;
  border: 1px solid #00f0ff; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.75rem;
  box-shadow: 0 0 10px rgba(0,240,255,0.15), inset 0 0 10px rgba(0,240,255,0.04);
}
[data-theme="cyber"] .btn-primary:hover {
  background: rgba(0,240,255,0.06); box-shadow: 0 0 24px rgba(0,240,255,0.3), inset 0 0 16px rgba(0,240,255,0.06);
  color: #00f0ff; transform: none;
}
[data-theme="cyber"] table th { background: rgba(0,240,255,0.05); color: #00f0ff; border-bottom: 1px solid rgba(0,240,255,0.15); letter-spacing: 0.06em; font-family: var(--font-mono); text-transform: uppercase; font-size: 0.7rem; }
[data-theme="cyber"] .stat-card { border-top: 2px solid #00f0ff; }
[data-theme="cyber"] h1, [data-theme="cyber"] h2, [data-theme="cyber"] h3 { font-family: var(--font-mono); letter-spacing: 0.03em; text-transform: uppercase; }
[data-theme="cyber"] .tab-btn.active { background: #00f0ff; color: #06060f; border-color: #00f0ff; box-shadow: 0 0 16px rgba(0,240,255,0.25); }
[data-theme="cyber"] .sidebar { background: rgba(6,6,15,0.95); border-right: 1px solid rgba(0,240,255,0.08); }
[data-theme="cyber"] .nav-item.active { background: rgba(0,240,255,0.08); border-left-color: #00f0ff; color: #00f0ff; }

/* ── 6. 浅色 Light — Soft lavender, airy & dreamy ──── */
[data-theme="light"] {
  --bg: #faf8fd;
  --card-bg: #ffffff;
  --card-bg-solid: #ffffff;
  --primary: #7c6ff7;
  --primary-dark: #6558d8;
  --primary-light: #f3f1ff;
  --accent: #f0657c;
  --success: #48bb78;
  --success-light: #f0faf4;
  --warning: #f0a048;
  --warning-light: #fef8f2;
  --danger: #f0657c;
  --danger-light: #fef2f4;
  --text: #2d2450;
  --text-secondary: #6e648a;
  --text-muted: #a49cc0;
  --border: #e0dcf0;
  --border-light: #eeeaf8;
  --shadow-sm: 0 1px 3px rgba(124,111,247,0.06);
  --shadow: 0 2px 8px rgba(124,111,247,0.06);
  --shadow-md: 0 4px 16px rgba(124,111,247,0.08);
  --shadow-lg: 0 8px 30px rgba(124,111,247,0.10);
  --shadow-xl: 0 16px 52px rgba(124,111,247,0.12);
  --glass-border: 1px solid rgba(255,255,255,0.8);
  --glass-border-strong: 1px solid rgba(255,255,255,0.92);
  --radius: 12px; --radius-lg: 18px; --radius-xl: 26px; --radius-full: 9999px;
}
[data-theme="light"] body {
  background: radial-gradient(ellipse at 25% 15%, rgba(124,111,247,0.05) 0%, transparent 50%),
              radial-gradient(ellipse at 75% 85%, rgba(240,101,124,0.04) 0%, transparent 50%), var(--bg);
  background-attachment: fixed;
}
[data-theme="light"] .card { border: 1px solid rgba(124,111,247,0.07); }
[data-theme="light"] .card:hover { border-color: rgba(124,111,247,0.14); box-shadow: 0 8px 30px rgba(124,111,247,0.10); }
[data-theme="light"] .btn-primary { box-shadow: 0 2px 10px rgba(124,111,247,0.25); }
[data-theme="light"] .btn-primary:hover { box-shadow: 0 6px 24px rgba(124,111,247,0.35); transform: translateY(-2px); }
[data-theme="light"] .stat-card { border-top: 3px solid var(--primary); }
[data-theme="light"] .sidebar { background: rgba(255,255,255,0.85); }

/* ── 7. 深色 Dark — OLED-optimized, GitHub-inspired ─── */
[data-theme="dark"] {
  --bg: #0d1117;
  --card-bg: rgba(22,27,34,0.82);
  --card-bg-solid: #161b22;
  --primary: #58a6ff;
  --primary-dark: #388bfd;
  --primary-light: rgba(88,166,255,0.1);
  --accent: #f78166;
  --success: #3fb950;
  --success-light: rgba(63,185,80,0.12);
  --warning: #d2991d;
  --warning-light: rgba(210,153,29,0.12);
  --danger: #f85149;
  --danger-light: rgba(248,81,73,0.12);
  --text: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #484f58;
  --border: #30363d;
  --border-light: #21262d;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow: 0 2px 6px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.45);
  --shadow-lg: 0 8px 28px rgba(0,0,0,0.5);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.55);
  --glass-border: 1px solid rgba(255,255,255,0.06);
  --glass-border-strong: 1px solid rgba(255,255,255,0.1);
}
[data-theme="dark"] body { background: var(--bg); background-attachment: fixed; color: var(--text); }
[data-theme="dark"] .card, [data-theme="dark"] .panel, [data-theme="dark"] .stat-card { background: var(--card-bg); border-color: var(--border); }
[data-theme="dark"] .card:hover { border-color: rgba(88,166,255,0.15); }
[data-theme="dark"] table th { background: rgba(88,166,255,0.05); color: var(--primary); border-bottom-color: var(--border); }
[data-theme="dark"] table td { border-bottom-color: var(--border); }
[data-theme="dark"] table tbody tr:nth-child(even) { background: rgba(255,255,255,0.015); }
[data-theme="dark"] table tbody tr:hover { background: rgba(88,166,255,0.04); }
[data-theme="dark"] input, [data-theme="dark"] select, [data-theme="dark"] textarea { background: rgba(13,17,23,0.6); color: var(--text); border-color: var(--border); }
[data-theme="dark"] input:focus, [data-theme="dark"] select:focus, [data-theme="dark"] textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(88,166,255,0.12); }
[data-theme="dark"] .btn { background: var(--card-bg); color: var(--text); border-color: var(--border); }
[data-theme="dark"] .btn:hover { border-color: var(--primary); }
[data-theme="dark"] .btn-primary { box-shadow: 0 2px 8px rgba(88,166,255,0.2); }
[data-theme="dark"] .btn-primary:hover { box-shadow: 0 6px 20px rgba(88,166,255,0.3); }
[data-theme="dark"] .modal { background: rgba(0,0,0,0.7); }
[data-theme="dark"] .sidebar { background: rgba(13,17,23,0.9); border-right-color: var(--border); }
[data-theme="dark"] .tab-btn { background: var(--card-bg); border-color: var(--border); color: var(--text-secondary); }
[data-theme="dark"] .tab-btn:hover { border-color: var(--primary); color: var(--primary); }
[data-theme="dark"] .tab-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
[data-theme="dark"] .toast { background: rgba(230,237,243,0.92); color: #0d1117; }

/* ============================================================
   Aesthetic Enhancements — Entry Animations & Refinements
   ============================================================ */

/* Page entry animation */
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.container, .main-content, .app-shell, .dashboard {
  animation: fadeSlideIn 0.4s ease-out;
}

/* Card hover glow */
.card, .panel {
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.2s ease;
}
.card:hover {
  border-color: rgba(45, 74, 122, 0.15);
  box-shadow: var(--shadow-lg);
}

/* Stat card accent border */
.stat-card {
  border-top: 3px solid var(--primary);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Table improvements */
table {
  border-collapse: separate;
  border-spacing: 0;
}
table tbody tr {
  transition: background 0.15s ease;
}
table tbody tr:nth-child(even) {
  background: rgba(45, 74, 122, 0.02);
}

/* Capsule list container */
.capsule-list, .student-capsule-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0;
  max-height: 300px;
  overflow-y: auto;
  padding: 4px;
}

/* Base capsule/pill styling */
.capsule-item {
  display: inline-block;
  background: #f1f5f9;
  border-radius: 40px;
  padding: 6px 16px;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  border: 1.5px solid transparent;
  transition: all 0.2s ease;
  user-select: none;
  white-space: nowrap;
}
.capsule-item:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
  border-color: var(--primary);
}
.capsule-item.selected {
  background: var(--primary) !important;
  color: #fff !important;
  border-color: var(--primary-dark) !important;
  box-shadow: 0 2px 8px rgba(45, 74, 122, 0.3);
}
.capsule-item:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.capsule-item.selected {
  background: var(--primary) !important;
  color: #fff !important;
  border-color: var(--primary-dark) !important;
  box-shadow: 0 2px 8px rgba(45, 74, 122, 0.3);
}

/* Modal card polish */
.modal-card {
  border: var(--glass-border);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* Smooth loading state */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
.loading-shimmer {
  background: linear-gradient(90deg, var(--border-light) 25%, transparent 50%, var(--border-light) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

/* Improved toast notification */
.toast {
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* Improved select & input focus ring */
input:focus, select:focus, textarea:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(45, 74, 122, 0.12);
}

/* Consistent section spacing */
.section { margin-bottom: 2rem; }

/* Empty state pattern */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
}
.empty-state i {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  opacity: 0.5;
}
.empty-state p {
  font-size: 0.9rem;
}

/* Grid card hover enhancement */
.student-info-card:hover,
.role-edit-card:hover,
.group-card:hover,
.dorm-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

/* Action icons consistency */
.action-icons i {
  transition: all 0.15s ease;
}

/* Improved sidebar animation */
.sidebar {
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Nav item active indicator */
.nav-item.active {
  border-left: 3px solid var(--primary);
}

/* Improved dark mode for additional elements */
[data-theme="dark"] .capsule-item {
  background: rgba(38, 36, 34, 0.7);
  color: var(--text-secondary);
  border-color: var(--border);
}
[data-theme="dark"] .capsule-item:hover {
  border-color: var(--primary);
  background: rgba(91, 140, 199, 0.1);
}
[data-theme="dark"] .capsule-item.selected {
  background: var(--primary) !important;
  color: #fff !important;
}
[data-theme="dark"] .student-info-card:hover,
[data-theme="dark"] .role-edit-card:hover,
[data-theme="dark"] .group-card:hover,
[data-theme="dark"] .dorm-card:hover {
  border-color: var(--primary);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}
[data-theme="dark"] .toast {
  background: rgba(30, 28, 26, 0.95);
  color: var(--text);
  border-color: var(--border);
}
[data-theme="dark"] table tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}
[data-theme="dark"] .btn-primary {
  box-shadow: 0 2px 8px rgba(91, 140, 199, 0.25);
}
[data-theme="dark"] .btn-primary:hover {
  box-shadow: 0 6px 20px rgba(91, 140, 199, 0.35);
}
[data-theme="dark"] .student-info-card,
[data-theme="dark"] .role-edit-card {
  background: rgba(38, 36, 34, 0.5);
  border-color: var(--border);
}

/* ============================================================
   Chart constraints & resize
   ============================================================ */
.chart-container {
  max-width: 100%;
  max-height: 350px;
  margin: 12px 0;
  position: relative;
}
.chart-container canvas {
  max-height: 350px !important;
  width: 100% !important;
}
.chart-container.resizable {
  resize: both;
  overflow: hidden;
  min-width: 280px;
  min-height: 180px;
  max-width: 100%;
  border: 1px dashed var(--border);
  padding: 8px 10px;
  border-radius: var(--radius);
  background: var(--card-bg);
}
.chart-container.resizable:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}
.resize-grip {
  position: absolute;
  bottom: 2px; right: 2px;
  font-size: 14px;
  color: var(--text-muted);
  pointer-events: none;
  transform: rotate(45deg);
  opacity: 0.5;
  line-height: 1;
}

/* ============================================================
   Responsive improvements
   ============================================================ */
@media (max-width: 900px) {
  .student-card-grid,
  .role-card-grid {
    grid-template-columns: 1fr !important;
  }
  #statsOverview {
    grid-template-columns: repeat(2, 1fr) !important;
  }
  /* === Item 6 — 搜索框响应式方案 === */
  .dashboard .header { flex-wrap: nowrap !important; gap: 0.5rem; }
  .search-box-wrapper input { display: none; }
  .search-box-wrapper .search-toggle-btn { display: inline-flex !important; }
  .search-box-wrapper.expanded input {
    display: block;
    position: absolute; top: calc(100% + 4px); right: 0;
    width: 280px; z-index: 1050;
  }
  .brand-text h1 { font-size: 1.2rem; }
  .brand-text p, .desktop-only { display: none; }
  .user-panel { flex-wrap: nowrap; }
}
@media (max-width: 600px) {
  .btn { font-size: 0.78rem; padding: 7px 14px; }
  .card { padding: 0.75rem; }
  .filter-bar { border-radius: var(--radius); flex-direction: column; }
}

/* ----- Theme Selector ----- */
.theme-selector-wrapper { position: relative; }
#themeBtn {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 0.78rem; cursor: pointer;
}
.theme-dropdown {
  animation: notifSlideIn 0.15s ease;
}
.theme-option {
  padding: 10px 16px; cursor: pointer; font-size: 0.82rem;
  transition: background var(--transition-fast);
  display: flex; justify-content: space-between; align-items: center;
  border-bottom: 1px solid var(--border-light);
  color: var(--text);
}
.theme-option:last-child { border-bottom: none; }
.theme-option:hover { background: var(--primary-light); color: var(--primary); }
.theme-option small { color: var(--text-muted); font-size: 0.65rem; }

/* ============================================================
   Print Styles
   ============================================================ */
@media print {
  body * { visibility: hidden; }
  .print-area,
  .print-area * { visibility: visible; }
  .print-area {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
  }
  .no-print,
  .sidebar,
  .header,
  .page-header,
  .btn,
  .tab-nav,
  .nav-item,
  .filter-bar,
  .modal,
  .toast,
  .action-icons,
  .theme-toggle,
  .announcement-bar,
  .insight-row,
  footer,
  .login-overlay,
  .dashboard .header,
  #globalAnnounce,
  #logoutBtn,
  #refreshBtn,
  #settingsLink {
    display: none !important;
  }
  @page { margin: 1cm; }
  body {
    background: white !important;
    color: #000 !important;
  }
  .card,
  .panel,
  .stat-card {
    box-shadow: none !important;
    border: 1px solid #ddd !important;
    background: white !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }
  table th {
    background: #f5f5f5 !important;
    color: #000 !important;
  }
  a { color: #000 !important; }
}

/* ===== 批量操作工具栏 ===== */
.batch-action-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  margin-bottom: 12px;
  background: var(--primary-light, #eef2ff);
  border-radius: 12px;
  border: 1px dashed var(--primary, #4f6ef7);
  font-size: 0.9rem;
  animation: fadeInDown 0.25s ease;
}
.batch-action-bar span {
  font-weight: 600;
  color: var(--primary, #4f6ef7);
  flex: 1;
}

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

/* ========== 移动端响应式 ========== */
@media (max-width: 768px) {
  body { font-size: 14px; }
  .container { padding: 0.75rem; }
  .header { flex-direction: column; align-items: flex-start; }
  .header h1 { font-size: 1.3rem; }

  /* 表单 */
  .form-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr !important; }
  .form-group input, .form-group select, .form-group textarea {
    font-size: 16px; /* iOS不缩放 */
  }

  /* 表格横向滚动 */
  .table-wrapper { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  table { font-size: 0.75rem; }
  th, td { padding: 8px 6px; white-space: nowrap; }

  /* 卡片 */
  .card { padding: 1rem; border-radius: 12px; }
  .stat-cards { grid-template-columns: repeat(2, 1fr); gap: 0.5rem; }
  .stat-card { padding: 1rem; }
  .stat-value { font-size: 1.4rem; }

  /* 按钮 */
  .btn { padding: 8px 14px; font-size: 0.85rem; }
  .action-buttons { flex-wrap: wrap; width: 100%; }
  .action-buttons .btn { flex: 1; min-width: 100px; }

  /* 模态框 */
  .modal-card { max-width: 95vw; padding: 1.25rem; margin: 1rem; }
  .modal-body .form-row { grid-template-columns: 1fr; }

  /* 签到页学生网格 */
  .student-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 0.5rem; }
  .student-capsule { font-size: 0.8rem; padding: 6px 10px; }

  /* 积分管理页 */
  .points-grid { grid-template-columns: 1fr; }

  /* 教师工作台 */
  .dashboard-grid { grid-template-columns: 1fr; }

  /* 可视化大屏 */
  .charts-grid { grid-template-columns: 1fr; }
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
  .kpi-value { font-size: 1.6rem; }

  /* 座次编辑器 */
  .seat-grid-editor { font-size: 0.65rem; }
  .seat-editor-card { min-height: 40px; padding: 4px; }

  /* 设置页 */
  .settings-grid { grid-template-columns: 1fr; }

  /* 顶部导航改为纵向 */
  .navbar { flex-direction: column; gap: 0.5rem; padding: 0.75rem; }
  .navbar .nav-links { flex-wrap: wrap; gap: 0.5rem; }
  .navbar .nav-links a { font-size: 0.8rem; padding: 6px 10px; }

  /* 隐藏非必要元素 */
  .desktop-only { display: none !important; }
}

@media (max-width: 480px) {
  .kpi-row { grid-template-columns: 1fr; }
  .stat-cards { grid-template-columns: 1fr; }
  .badges-grid { grid-template-columns: repeat(2, 1fr); }
  .btn-lg { width: 100%; }
  .header h1 { font-size: 1.1rem; }
  .modal-card { padding: 1rem; margin: 0.5rem; }
}

/* 平板竖屏 */
@media (min-width: 769px) and (max-width: 1024px) {
  .charts-grid { grid-template-columns: 1fr; }
  .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
  .container { max-width: 95vw; }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
  .btn, button, select, input[type="checkbox"], input[type="radio"] {
    min-height: 44px; /* iOS 触摸目标最小尺寸 */
  }
  .action-icons button { width: 40px; height: 40px; }
  /* 触摸设备禁用悬浮效果 */
  .stat-card:hover, .badge-card:hover { transform: none; }
}


/* ══════════════════════════════════════
   用户下拉菜单
   ══════════════════════════════════════ */
.user-dropdown {
  animation: dropdownFadeIn 0.15s ease;
}
@keyframes dropdownFadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}
#userDropdown a:hover { background: #f6f6f6; }

/* ── Notification Dropdown ── */
.notif-wrapper { position: relative; }
.notif-bell-btn { position: relative; }
.notif-badge {
  position: absolute; top: -4px; right: -6px;
  min-width: 18px; height: 18px;
  background: var(--danger); color: #fff;
  border-radius: 9px; font-size: 0.65rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  padding: 0 4px; pointer-events: none;
}
.notif-dropdown {
  position: absolute; top: calc(100% + 8px); right: 0;
  width: 380px; max-width: 90vw; max-height: 460px;
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 12px; box-shadow: var(--shadow-xl);
  z-index: 1001; overflow: hidden;
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.notif-dropdown-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px; border-bottom: 1px solid var(--border-light);
  font-size: 0.85rem;
}
.notif-mark-all { background: none; border: none; font-size: 0.75rem; color: var(--primary); cursor: pointer; }
.notif-mark-all:hover { text-decoration: underline; }
.notif-list { max-height: 380px; overflow-y: auto; padding: 4px 0; }
.notif-empty { text-align: center; padding: 2rem 1rem; color: var(--text-muted); font-size: 0.82rem; }
.notif-item { padding: 10px 16px; border-bottom: 1px solid var(--border-light); cursor: pointer; transition: background 0.15s; }
.notif-item:hover { background: rgba(0,0,0,0.02); }
.notif-item.unread { background: rgba(59,130,246,0.04); }
.notif-collapse-toggle:hover { text-decoration: underline; }
@keyframes notifFadeIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: translateY(0); } }
@keyframes notifFadeOut { from { opacity: 1; transform: translateY(0); } to { opacity: 0; transform: translateY(-4px); } }