/* =====================================================
   智能天气预警推送平台 - 设计系统 V2
   绿色主题 | 毛玻璃效果 | 响应式设计
   ===================================================== */

/* ==================== 设计令牌 ==================== */
:root {
  /* 主品牌色 - 绿色系 */
  --color-brand-50: #f0fdf4;
  --color-brand-100: #dcfce7;
  --color-brand-200: #bbf7d0;
  --color-brand-300: #86efac;
  --color-brand-400: #4ade80;
  --color-brand-500: #22c55e;
  --color-brand-600: #16a34a;
  --color-brand-700: #15803d;
  --color-brand-800: #166534;
  --color-brand-900: #14532d;

  /* 语义色 */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-info: #3b82f6;

  /* 中性色 */
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* 背景色 */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;

  /* 文字色 */
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-tertiary: #9ca3af;
  --text-inverse: #ffffff;

  /* 边框色 */
  --border-light: #f3f4f6;
  --border-default: #e5e7eb;
  --border-strong: #d1d5db;

  /* 字体 */
  --font-display: 'Outfit', system-ui, -apple-system, sans-serif;
  --font-body: 'Source Sans 3', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* 字体大小 */
  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-lg: 1.125rem;    /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 1.875rem;  /* 30px */
  --text-4xl: 2.25rem;   /* 36px */

  /* 间距 */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.12);

  /* 侧边栏 */
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 72px;
  --topbar-height: 64px;

  /* 过渡 */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
}

/* ==================== 暗色主题 ==================== */
[data-theme="dark"] {
  --bg-primary: #111827;
  --bg-secondary: #1f2937;
  --bg-tertiary: #374151;
  
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-tertiary: #6b7280;
  
  --border-light: #1f2937;
  --border-default: #374151;
  --border-strong: #4b5563;
  
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.4);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--transition-normal), color var(--transition-normal);
}

/* ==================== 图标系统 ==================== */
.icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.icon-sm {
  width: 18px;
  height: 18px;
}

.icon-lg {
  width: 32px;
  height: 32px;
}

/* ==================== 布局系统 ==================== */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* ==================== 侧边栏 ==================== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: linear-gradient(180deg, #064e3b 0%, #047857 100%);
  color: white;
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform var(--transition-normal), width var(--transition-normal);
  overflow: hidden;
}

.sidebar-collapsed {
  width: var(--sidebar-collapsed-width);
}

.sidebar-header {
  padding: var(--space-6);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-height: 80px;
}

.sidebar-logo {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-brand-500), var(--color-brand-600));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(34,197,94,0.3);
}

.sidebar-logo .icon {
  color: white;
}

.sidebar-brand {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  white-space: nowrap;
  transition: opacity var(--transition-fast);
}

.sidebar-collapsed .sidebar-brand {
  opacity: 0;
  width: 0;
}

.sidebar-brand-name {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.sidebar-brand-tag {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
  font-weight: 400;
}

/* 导航 */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4) 0;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
}

.sidebar-nav::-webkit-scrollbar {
  width: 4px;
}

.sidebar-nav::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.1);
  border-radius: 2px;
}

.nav-section {
  padding: var(--space-4) var(--space-6) var(--space-2);
  font-size: 11px;
  font-weight: 600;
  color: rgba(255,255,255,0.35);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: 10px var(--space-6);
  color: rgba(255,255,255,0.65);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  border-left: 3px solid transparent;
  position: relative;
}

.nav-item:hover {
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.95);
}

.nav-item.active {
  background: rgba(34,197,94,0.15);
  color: var(--color-brand-400);
  border-left-color: var(--color-brand-500);
}

.nav-item .icon {
  color: currentColor;
  opacity: 0.8;
}

.nav-item.active .icon {
  opacity: 1;
  color: var(--color-brand-400);
}

.nav-item-badge {
  margin-left: auto;
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.7);
  font-size: 11px;
  font-weight: 600;
  padding: 1px 8px;
  border-radius: var(--radius-full);
  min-width: 20px;
  text-align: center;
}

.nav-item.active .nav-item-badge {
  background: rgba(34,197,94,0.2);
  color: var(--color-brand-400);
}

.sidebar-collapsed .nav-item {
  justify-content: center;
  padding: 10px 0;
}

.sidebar-collapsed .nav-item span:not(.icon):not(.nav-item-badge) {
  display: none;
}

.sidebar-collapsed .nav-item-badge {
  position: absolute;
  top: 4px;
  right: 8px;
  font-size: 9px;
  padding: 0 4px;
  min-width: 16px;
}

/* 侧边栏底部 */
.sidebar-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.sidebar-footer-status {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 8px rgba(16,185,129,0.5);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.sidebar-footer-text {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
}

.sidebar-collapsed .sidebar-footer-text {
  display: none;
}

/* ==================== 主内容区 ==================== */
.main-area {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left var(--transition-normal);
}

.sidebar-collapsed ~ .main-area {
  margin-left: var(--sidebar-collapsed-width);
}

/* 顶部栏 */
.topbar {
  height: var(--topbar-height);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  padding: 0 var(--space-8);
  gap: var(--space-4);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.topbar-btn {
  width: 36px;
  height: 36px;
  border: none;
  background: none;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.topbar-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.topbar-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  flex: 1;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* 用户菜单 */
.user-menu {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
  position: relative;
}

.user-menu:hover {
  background: var(--bg-tertiary);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-brand-500), var(--color-brand-600));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: 600;
}

.user-name {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
}

.user-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--space-2);
  background: var(--bg-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 180px;
  padding: var(--space-2);
  z-index: 200;
  display: none;
}

.user-dropdown.show {
  display: block;
  animation: dropdownIn 0.2s ease;
}

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

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.dropdown-item:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.dropdown-divider {
  height: 1px;
  background: var(--border-light);
  margin: var(--space-2) 0;
}

/* ==================== 内容区 ==================== */
.content-area {
  flex: 1;
  padding: var(--space-8);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

/* ==================== 卡片 ==================== */
.card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.card-body {
  padding: var(--space-6);
}

.card-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
}

/* ==================== 统计卡片 ==================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.stat-card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  padding: var(--space-6);
  display: flex;
  align-items: flex-start;
  gap: var(--space-5);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon .icon {
  color: white;
}

.stat-icon.brand { background: linear-gradient(135deg, var(--color-brand-500), var(--color-brand-600)); }
.stat-icon.blue { background: linear-gradient(135deg, #3b82f6, #2563eb); }
.stat-icon.green { background: linear-gradient(135deg, var(--color-success), #059669); }
.stat-icon.orange { background: linear-gradient(135deg, var(--color-warning), #d97706); }
.stat-icon.red { background: linear-gradient(135deg, var(--color-danger), #dc2626); }
.stat-icon.purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }

.stat-info {
  flex: 1;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  margin-top: var(--space-1);
}

.stat-trend {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 600;
  margin-top: var(--space-2);
}

.stat-trend.up { color: var(--color-success); }
.stat-trend.down { color: var(--color-danger); }

/* ==================== 按钮 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 8px 20px;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-brand-500);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-brand-500), var(--color-brand-600));
  color: white;
  box-shadow: 0 2px 8px rgba(34,197,94,0.25);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-brand-600), var(--color-brand-700));
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(34,197,94,0.35);
}

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

.btn-secondary:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.btn-danger {
  background: linear-gradient(135deg, var(--color-danger), #dc2626);
  color: white;
}

.btn-danger:hover {
  background: linear-gradient(135deg, #dc2626, #b91c1c);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 6px 14px;
  font-size: var(--text-xs);
}

.btn-lg {
  padding: 12px 28px;
  font-size: var(--text-base);
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-md);
}

/* ==================== 表单 ==================== */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.form-input {
  width: 100%;
  padding: 10px var(--space-4);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--bg-primary);
  border: 1.5px solid var(--border-default);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-brand-500);
  box-shadow: 0 0 0 3px rgba(34,197,94,0.1);
}

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

select.form-input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

textarea.form-input {
  resize: vertical;
  min-height: 80px;
  line-height: 1.6;
}

/* ==================== 表格 ==================== */
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

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

th {
  padding: var(--space-3) var(--space-5);
  text-align: left;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-default);
  white-space: nowrap;
}

td {
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
}

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

/* ==================== 标签 ==================== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px 12px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  white-space: nowrap;
}

.tag-brand {
  background: var(--color-brand-50);
  color: var(--color-brand-700);
}

.tag-blue {
  background: #eff6ff;
  color: #2563eb;
}

.tag-green {
  background: #ecfdf5;
  color: #059669;
}

.tag-orange {
  background: #fffbeb;
  color: #d97706;
}

.tag-red {
  background: #fef2f2;
  color: #dc2626;
}

.tag-gray {
  background: var(--bg-tertiary);
  color: var(--text-tertiary);
}

/* ==================== 开关 ==================== */
.toggle {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--color-gray-300);
  border-radius: 24px;
  transition: var(--transition-normal);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: var(--transition-normal);
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

.toggle input:checked + .toggle-slider {
  background: var(--color-brand-500);
}

.toggle input:checked + .toggle-slider::before {
  transform: translateX(20px);
}

/* ==================== 模态框 ==================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

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

.modal {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 560px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  transform: translateY(20px);
  transition: transform var(--transition-normal);
  overflow: hidden;
}

.modal-overlay.show .modal {
  transform: translateY(0);
}

.modal-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close {
  width: 32px;
  height: 32px;
  border: none;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-tertiary);
  transition: all var(--transition-fast);
}

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

.modal-body {
  padding: var(--space-6);
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
}

/* ==================== Toast 通知 ==================== */
.toast-container {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toast {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  color: white;
  font-size: var(--text-sm);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 300px;
  max-width: 420px;
  animation: toastIn 0.3s ease;
}

.toast.info { background: var(--color-info); }
.toast.success { background: var(--color-success); }
.toast.warning { background: var(--color-warning); }
.toast.error { background: var(--color-danger); }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(40px); }
}

/* ==================== 空状态 ==================== */
.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-8);
  color: var(--text-tertiary);
}

.empty-state .icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  opacity: 0.4;
}

.empty-state h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.empty-state p {
  font-size: var(--text-sm);
  max-width: 400px;
  margin: 0 auto;
}

/* ==================== 搜索栏 ==================== */
.search-bar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.search-input {
  flex: 1;
  max-width: 400px;
  padding: 8px var(--space-4) 8px var(--space-10);
  font-size: var(--text-sm);
  border: 1.5px solid var(--border-default);
  border-radius: var(--radius-full);
  background: var(--bg-primary) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'/%3E%3C/svg%3E") no-repeat left 14px center;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  outline: none;
}

.search-input:focus {
  border-color: var(--color-brand-500);
  box-shadow: 0 0 0 3px rgba(34,197,94,0.1);
}

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.mobile-show {
    transform: translateX(0);
  }
  
  .main-area {
    margin-left: 0 !important;
  }
  
  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
}

@media (max-width: 768px) {
  .content-area {
    padding: var(--space-4);
  }
  
  .topbar {
    padding: 0 var(--space-4);
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }
}

/* ==================== 工具类 ==================== */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.text-sm { font-size: var(--text-sm); }
.text-xs { font-size: var(--text-xs); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.font-semibold { font-weight: 600; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }