/* 全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #38bdf8;
  --primary-light: #7dd3fc;
  --primary-dark: #0ea5e9;
  --accent: #38bdf8;
  --accent-light: #bae6fd;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --bg-card: #ffffff;
  --text-primary: #334155;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #f43f5e;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --shadow-sm: 0 1px 3px rgba(56, 189, 248, 0.08);
  --shadow: 0 4px 12px rgba(56, 189, 248, 0.12);
  --shadow-lg: 0 12px 24px rgba(56, 189, 248, 0.15);
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-light);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* 登录页面 */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 20px;
}

.login-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 50%, #e0f2fe 100%);
  z-index: -1;
}

.login-bg::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.15) 0%, transparent 70%);
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

.login-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 48px 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg), 0 0 40px rgba(56, 189, 248, 0.12);
  animation: cardAppear 0.6s ease-out;
}

@keyframes cardAppear {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.logo {
  text-align: center;
  margin-bottom: 36px;
}

.logo-icon {
  font-size: 56px;
  margin-bottom: 16px;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.logo h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 2px;
  margin-bottom: 8px;
}

.logo .subtitle {
  font-size: 13px;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 3px;
  font-weight: 500;
}

/* 登录选项卡 */
.login-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  background: var(--bg-light);
  padding: 6px;
  border-radius: 12px;
}

.tab-btn {
  flex: 1;
  padding: 12px 16px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  background: linear-gradient(135deg, #38bdf8 0%, #7dd3fc 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.3);
}

/* 表单 */
.login-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.form-group input, .form-group select {
  background: var(--bg-light);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  font-size: 15px;
  color: var(--text-primary);
  transition: all 0.3s ease;
}

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

.form-group input:focus, .form-group select:focus {
  outline: none;
  border-color: #38bdf8;
  background: var(--bg-white);
  box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.15);
}

.login-btn {
  background: linear-gradient(135deg, #38bdf8 0%, #7dd3fc 100%);
  border: none;
  border-radius: 12px;
  padding: 18px 32px;
  font-size: 16px;
  font-weight: 600;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  margin-top: 8px;
}

.login-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(56, 189, 248, 0.4);
}

.login-btn:active {
  transform: translateY(0);
}

.login-btn.loading span {
  opacity: 0;
}

.btn-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 24px;
  height: 24px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  display: none;
  animation: spin 0.8s linear infinite;
}

.login-btn.loading .btn-loading {
  display: block;
}

@keyframes spin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.login-footer {
  text-align: center;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.login-footer p {
  font-size: 12px;
  color: var(--text-muted);
}

/* 主界面布局 */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
  width: 260px;
  background: var(--bg-white);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 100;
  box-shadow: var(--shadow);
}

.sidebar-header {
  padding: 24px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-logo span:first-child {
  font-size: 32px;
}

.sidebar-logo span:last-child {
  font-size: 18px;
  font-weight: 600;
  color: #0ea5e9;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.nav-section {
  margin-bottom: 24px;
}

.nav-section-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  padding: 8px 12px;
  font-weight: 600;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 10px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  margin-bottom: 4px;
}

.nav-item:hover {
  background: var(--bg-light);
  color: var(--primary);
}

.nav-item.active {
  background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%);
  color: #0284c7;
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.2);
  border: 1px solid #7dd3fc;
}

.nav-item .icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border);
  background: var(--bg-light);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-white);
  border-radius: 12px;
  border: 1px solid var(--border);
}

.user-avatar {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #0284c7;
  border: 1px solid #7dd3fc;
}

.user-details {
  flex: 1;
}

.user-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.user-role {
  font-size: 12px;
  color: var(--text-muted);
}

.logout-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.logout-btn:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

/* 主内容区 */
.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 24px;
  background: var(--bg-light);
}

.page-header {
  margin-bottom: 24px;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.page-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
}

/* 统计卡片 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.stat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.stat-icon.blue { background: #e0f2fe; color: #0ea5e9; }
.stat-icon.green { background: #dcfce7; color: #22c55e; }
.stat-icon.orange { background: #fef3c7; color: #f59e0b; }
.stat-icon.cyan { background: #cffafe; color: #06b6d4; }

.stat-value {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
}

/* 数据表格 */
.data-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-white);
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.card-actions {
  display: flex;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, #38bdf8 0%, #7dd3fc 100%);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.35);
}

.btn-secondary {
  background: var(--bg-light);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border-light);
  border-color: var(--primary-light);
}

.btn-danger {
  background: #fef2f2;
  color: var(--danger);
  border: 1px solid #fecaca;
}

.btn-danger:hover {
  background: #fee2e2;
}

.btn-success {
  background: #ecfdf5;
  color: var(--success);
  border: 1px solid #a7f3d0;
}

.btn-success:hover {
  background: #d1fae5;
}

.btn-warning {
  background: #fffbeb;
  color: var(--warning);
  border: 1px solid #fde68a;
}

.btn-warning:hover {
  background: #fef3c7;
}

/* 表格样式 */
.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  font-weight: 600;
  background: var(--bg-light);
}

td {
  font-size: 14px;
  color: var(--text-primary);
}

tr:hover td {
  background: var(--bg-light);
}

/* 状态标签 */
.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.status-badge.empty {
  background: #d1fae5;
  color: #059669;
}

.status-badge.occupied {
  background: #fef3c7;
  color: #d97706;
}

.status-badge.booked {
  background: #dbeafe;
  color: #2563eb;
}

.status-badge.checked-in {
  background: #e0f2fe;
  color: #0284c7;
}

.status-badge.checked-out {
  background: #f3f4f6;
  color: #6b7280;
}

/* 搜索框 */
.search-box {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-light);
  border: 2px solid var(--border);
  border-radius: 10px;
  padding: 8px 16px;
  width: 280px;
  transition: all 0.3s ease;
}

.search-box:focus-within {
  border-color: var(--primary);
  background: var(--bg-white);
}

.search-box input {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
}

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

/* 筛选 */
.filters {
  display: flex;
  gap: 12px;
  padding: 16px 24px;
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
}

.filter-select {
  background: var(--bg-white);
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 10px 16px;
  color: var(--text-primary);
  font-size: 14px;
  cursor: pointer;
  min-width: 150px;
  transition: all 0.3s ease;
}

.filter-select:focus {
  outline: none;
  border-color: var(--primary);
}

/* 模态框 */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 20px;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9) translateY(20px);
  transition: all 0.3s ease;
  box-shadow: var(--shadow-lg);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-light);
}

.modal-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  padding: 4px;
  line-height: 1;
  transition: color 0.2s ease;
  border-radius: 8px;
}

.modal-close:hover {
  color: var(--danger);
  background: #fef2f2;
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg-light);
}

/* 表单在模态框中 */
.modal .form-group {
  margin-bottom: 20px;
}

.modal .form-group:last-child {
  margin-bottom: 0;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Toast 提示 */
.toast-container {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toast {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 300px;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateX(100px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.toast.success {
  border-left: 4px solid var(--success);
  background: #ecfdf5;
}

.toast.error {
  border-left: 4px solid var(--danger);
  background: #fef2f2;
}

.toast.warning {
  border-left: 4px solid var(--warning);
  background: #fffbeb;
}

.toast-icon {
  font-size: 20px;
}

.toast-message {
  flex: 1;
  font-size: 14px;
  color: var(--text-primary);
}

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 60px 20px;
}

.empty-state .icon {
  font-size: 64px;
  margin-bottom: 20px;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 18px;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.empty-state p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* 加载状态 */
.loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* 响应式 */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .filters {
    flex-wrap: wrap;
  }
}