/* ===== 星夜传图 - 培训教室预约系统 样式 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #2563eb;
  --primary-light: #3b82f6;
  --primary-dark: #1d4ed8;
  --accent: #0ea5e9;
  --bg-deep: #0a0e27;
  --bg-mid: #131842;
  --bg-card: rgba(255,255,255,0.06);
  --bg-card-hover: rgba(255,255,255,0.1);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: rgba(255,255,255,0.1);
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --shadow: 0 8px 32px rgba(0,0,0,0.3);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===== 星空背景 ===== */
.starry-bg {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, #0a0e27 0%, #131842 40%, #1a1f5c 70%, #0f172a 100%);
  z-index: -2;
}
.starry-bg::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    radial-gradient(2px 2px at 20px 30px, rgba(255,255,255,0.8), transparent),
    radial-gradient(2px 2px at 40px 70px, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 90px 40px, rgba(255,255,255,0.9), transparent),
    radial-gradient(2px 2px at 130px 80px, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 160px 120px, rgba(255,255,255,0.7), transparent),
    radial-gradient(2px 2px at 200px 50px, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 250px 100px, rgba(255,255,255,0.8), transparent),
    radial-gradient(2px 2px at 300px 30px, rgba(255,255,255,0.5), transparent);
  background-size: 350px 200px;
  animation: twinkle 8s ease-in-out infinite alternate;
}
.starry-bg::after {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(ellipse at 30% 20%, rgba(37,99,235,0.15) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 80%, rgba(14,165,233,0.1) 0%, transparent 50%);
  animation: drift 20s ease-in-out infinite alternate;
}
@keyframes twinkle {
  0% { opacity: 0.7; }
  100% { opacity: 1; }
}
@keyframes drift {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(2%, 2%) rotate(1deg); }
}

/* ===== 顶部导航 ===== */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  background: rgba(10,14,39,0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-area img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, #60a5fa, #38bdf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.logo-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}
.nav-links {
  display: flex;
  gap: 8px;
}
.nav-link {
  padding: 8px 16px;
  border-radius: 8px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.2s;
  cursor: pointer;
}
.nav-link:hover, .nav-link.active {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

/* ===== 主内容区 ===== */
.main-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px 32px;
}

/* 统计卡片 */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 24px;
  transition: all 0.3s;
}
.stat-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}
.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.stat-value {
  font-size: 32px;
  font-weight: 700;
  background: linear-gradient(135deg, #60a5fa, #38bdf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 内容布局 */
.content-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 24px;
}

/* 卡片通用 */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}
.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-title {
  font-size: 16px;
  font-weight: 600;
}
.card-body {
  padding: 20px;
}

/* ===== 日历 ===== */
.calendar-wrapper {
  padding: 16px;
}
.fc {
  --fc-border-color: var(--border);
  --fc-page-bg-color: transparent;
  --fc-neutral-bg-color: rgba(255,255,255,0.03);
  --fc-today-bg-color: rgba(37,99,235,0.15);
  --fc-event-bg-color: var(--primary);
  --fc-event-border-color: var(--primary-light);
  --fc-event-text-color: #fff;
  color: var(--text-primary);
}
.fc .fc-toolbar-title {
  font-size: 18px;
  font-weight: 600;
}
.fc .fc-button {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  text-transform: none;
  font-size: 13px;
  padding: 6px 14px;
  border-radius: 8px;
  transition: all 0.2s;
}
.fc .fc-button:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary-light);
}
.fc .fc-button-primary:not(:disabled).fc-button-active,
.fc .fc-button-primary:not(:disabled):active {
  background: var(--primary);
  border-color: var(--primary);
}
.fc .fc-col-header-cell-cushion {
  color: var(--text-secondary);
  font-weight: 500;
  padding: 8px 4px;
}
.fc .fc-daygrid-day-number {
  color: var(--text-secondary);
  padding: 6px;
}
.fc .fc-day-today .fc-daygrid-day-number {
  color: var(--accent);
  font-weight: 700;
}
.fc-event {
  border-radius: 6px;
  padding: 2px 6px;
  font-size: 12px;
  border: none;
  cursor: pointer;
}
.fc-event:hover {
  opacity: 0.85;
}

/* 会议室筛选 */
.room-filter {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 0 16px 12px;
}
.room-tag {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 6px;
}
.room-tag .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.room-tag.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ===== 预约表单 ===== */
.form-group {
  margin-bottom: 16px;
}
.form-label {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-weight: 500;
}
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 14px;
  transition: all 0.2s;
  outline: none;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--primary-light);
  background: rgba(255,255,255,0.08);
}
.form-input::placeholder {
  color: var(--text-muted);
}
.form-select option {
  background: var(--bg-mid);
  color: var(--text-primary);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* 按钮 */
.btn {
  padding: 10px 20px;
  border-radius: 10px;
  border: none;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(37,99,235,0.4);
}
.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  background: var(--bg-card-hover);
}
.btn-danger {
  background: var(--danger);
  color: #fff;
}
.btn-block {
  width: 100%;
  justify-content: center;
}

/* 切换标签 */
.tab-switch {
  display: flex;
  background: rgba(255,255,255,0.05);
  border-radius: 10px;
  padding: 4px;
  margin-bottom: 20px;
}
.tab-item {
  flex: 1;
  text-align: center;
  padding: 8px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.2s;
}
.tab-item.active {
  background: var(--primary);
  color: #fff;
}

/* 星期选择 */
.weekday-selector {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
}
.weekday-btn {
  flex: 1;
  padding: 8px 0;
  text-align: center;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}
.weekday-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* 预约列表 */
.booking-list {
  max-height: 400px;
  overflow-y: auto;
}
.booking-item {
  padding: 12px;
  border-radius: 10px;
  background: rgba(255,255,255,0.03);
  margin-bottom: 8px;
  border-left: 3px solid var(--primary);
  cursor: pointer;
  transition: all 0.2s;
}
.booking-item:hover {
  background: rgba(255,255,255,0.06);
}
.booking-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}
.booking-meta {
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.booking-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* 弹窗 */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal-overlay.show {
  display: flex;
}
.modal {
  background: var(--bg-mid);
  border: 1px solid var(--border);
  border-radius: 20px;
  width: 90%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
}
.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-title {
  font-size: 18px;
  font-weight: 600;
}
.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: none;
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-close:hover {
  background: var(--bg-card-hover);
}
.modal-body {
  padding: 24px;
}
.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* Toast 提示 */
.toast-container {
  position: fixed;
  top: 80px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  padding: 12px 20px;
  border-radius: 10px;
  background: var(--bg-mid);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 14px;
  box-shadow: var(--shadow);
  animation: slideIn 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}
.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.warning { border-left: 3px solid var(--warning); }
@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}
.empty-state-icon {
  font-size: 48px;
  margin-bottom: 12px;
  opacity: 0.5;
}

/* 滚动条 */
::-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); }

/* 响应式 */
@media (max-width: 1024px) {
  .content-layout { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .header { padding: 12px 16px; }
  .main-container { padding: 16px; }
  .form-row { grid-template-columns: 1fr; }
  .logo-text { font-size: 16px; }
}

/* ===== 后台管理样式 ===== */
.admin-table {
  width: 100%;
  border-collapse: collapse;
}
.admin-table th, .admin-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.admin-table th {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 13px;
}
.admin-table tr:hover {
  background: rgba(255,255,255,0.03);
}
.room-color-dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
}
.action-btns {
  display: flex;
  gap: 8px;
}
.action-btn {
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}
.action-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}
.action-btn.delete:hover {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

/* ===== 多时段表单 ===== */
.slot-row {
  margin-bottom: 8px;
}
.slot-time-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.slot-time-row .form-input {
  flex: 1;
  font-size: 13px;
  padding: 8px 10px;
}
.slot-sep {
  color: var(--text-muted);
  font-size: 13px;
  flex-shrink: 0;
}
.slot-del {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s;
}
.slot-del:hover {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

/* ===== 后台设置页 ===== */
.settings-section {
  margin-bottom: 32px;
}
.settings-section-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}
.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.logo-preview {
  width: 80px;
  height: 80px;
  border-radius: 16px;
  border: 2px solid var(--border);
  object-fit: cover;
  margin-bottom: 12px;
}
.color-preview-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.color-preview {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 2px solid var(--border);
}
.admin-header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.admin-tab-bar {
  display: flex;
  gap: 4px;
  padding: 0 20px;
  border-bottom: 1px solid var(--border);
}
.admin-tab {
  padding: 12px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}
.admin-tab:hover { color: var(--text-primary); }
.admin-tab.active {
  color: var(--primary-light);
  border-bottom-color: var(--primary);
}
.admin-tab-content { display: none; padding: 20px; }
.admin-tab-content.active { display: block; }