/* ===== CSS 变量 - 主题系统 ===== */
:root {
  /* 浅色主题 */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-hover: #e2e8f0;
  --border-color: #e2e8f0;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent: #f38020;
  --accent-hover: #e56b0a;
  --accent-light: #fff7ed;
  --success: #10b981;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --danger: #ef4444;
  --danger-light: #fee2e2;
  --info: #3b82f6;
  --info-light: #dbeafe;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --sidebar-width: 260px;
  /* 浅色模式下侧边栏变量（默认） */
  --sidebar-bg: #ffffff;
  --sidebar-text: #475569;
  --sidebar-hover: #f1f5f9;
  --sidebar-active: #f38020;
  --sidebar-border: #e2e8f0;
  --sidebar-logo: #0f172a;
  --sidebar-btn-hover: #e2e8f0;
  --radius: 10px;
  --radius-sm: 6px;
  --transition: 0.2s ease;
}

:root[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-card: #1e293b;
  --bg-hover: #334155;
  --border-color: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --accent: #f38020;
  --accent-hover: #ff9500;
  --accent-light: rgba(243, 128, 32, 0.15);
  --success: #34d399;
  --success-light: rgba(16, 185, 129, 0.15);
  --warning: #fbbf24;
  --warning-light: rgba(245, 158, 11, 0.15);
  --danger: #f87171;
  --danger-light: rgba(239, 68, 68, 0.15);
  --info: #60a5fa;
  --info-light: rgba(59, 130, 246, 0.15);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 4px 6px rgba(0, 0, 0, 0.4);
  --sidebar-bg: #020617;
  --sidebar-text: #e2e8f0;
  --sidebar-hover: #1e293b;
  --sidebar-active: #f38020;
  --sidebar-border: rgba(255, 255, 255, 0.08);
  --sidebar-logo: #ffffff;
  --sidebar-btn-hover: rgba(255, 255, 255, 0.1);
}

/* ===== 基础样式 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* ===== 应用布局 ===== */
#app {
  display: flex;
  min-height: 100vh;
}

/* ===== 侧边栏 ===== */
.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  border-right: 1px solid var(--sidebar-border);
  transition: transform var(--transition);
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--sidebar-border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--sidebar-logo);
}

.logo svg { color: var(--accent); }

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

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  color: var(--sidebar-text);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  margin-bottom: 4px;
  font-size: 0.95rem;
}

.nav-item:hover {
  background: var(--sidebar-hover);
  color: var(--sidebar-text);
}

.nav-item.active {
  background: var(--sidebar-active);
  color: #fff;
  font-weight: 500;
}

.nav-item svg { flex-shrink: 0; }

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

.theme-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px;
  background: var(--sidebar-hover);
  border: none;
  border-radius: var(--radius-sm);
  color: var(--sidebar-text);
  cursor: pointer;
  font-size: 0.9rem;
  transition: background var(--transition);
}

.theme-toggle:hover { background: var(--sidebar-btn-hover); }

.theme-toggle .icon-sun,
.theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }

.lang-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px;
  background: var(--sidebar-hover);
  border: none;
  border-radius: var(--radius-sm);
  color: var(--sidebar-text);
  cursor: pointer;
  font-size: 0.9rem;
  transition: background var(--transition);
}

.lang-toggle:hover { background: var(--sidebar-btn-hover); }

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

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 24px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
}

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

.page-title {
  font-size: 1.25rem;
  font-weight: 600;
}

.topbar-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.active-account {
  padding: 6px 12px;
  background: var(--accent-light);
  color: var(--accent);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); }

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

.btn-danger {
  background: var(--danger);
  color: #fff;
}
.btn-danger:hover { opacity: 0.9; }

.btn-sm { padding: 4px 10px; font-size: 0.8rem; }
.btn-lg { padding: 12px 24px; font-size: 1rem; }
.btn-icon { padding: 8px; background: var(--bg-tertiary); }

/* ===== 内容区 ===== */
.content {
  flex: 1;
  padding: 24px;
  overflow-x: hidden;
}

.page { animation: fadeIn 0.3s ease; }
.page.hidden { display: none; }

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

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.page-header h2 { font-size: 1.5rem; }

.filter-bar { display: flex; gap: 8px; }

/* ===== 统计卡片 ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.stat-progress { display: flex; flex-direction: column; gap: 6px; }

.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  border-radius: 3px;
  transition: width 0.5s ease;
  width: 0%;
}

.stat-ratio {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.stat-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== 图表卡片 ===== */
.chart-row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 24px;
  overflow: hidden;
}

.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
}

.chart-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.chart-body {
  padding: 20px;
  height: 350px;
  position: relative;
}

.table-container {
  padding: 0;
  height: auto;
  overflow-x: auto;
}

/* ===== 表格 ===== */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th,
.data-table td {
  padding: 12px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9rem;
}

.data-table th {
  background: var(--bg-tertiary);
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.data-table tr:hover td {
  background: var(--bg-hover);
}

.data-table .empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 40px 20px;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 500;
}
.badge-success { background: var(--success-light); color: var(--success); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-info { background: var(--info-light); color: var(--info); }

/* ===== 账户卡片 ===== */
.accounts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.account-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  position: relative;
}

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

.account-card.active {
  border-color: var(--accent);
  border-width: 2px;
}

.account-card-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  margin-bottom: 12px;
}

.account-name {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.account-id {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: monospace;
  word-break: break-all;
}

.account-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 12px 0;
}

.account-stat {
  background: var(--bg-tertiary);
  padding: 10px;
  border-radius: var(--radius-sm);
}

.account-stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.account-stat-value {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.account-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
}

.account-actions .btn { flex: 1; justify-content: center; }

/* ===== 数据管理页面 ===== */
.data-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.action-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow);
}

.action-card.danger { border-color: var(--danger); }

.action-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.action-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.action-card p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.data-info {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.data-info h3 { margin-bottom: 16px; }

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
}

.info-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.info-value {
  font-size: 1.25rem;
  font-weight: 600;
}

/* ===== 设置页面 ===== */
.settings-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}

.settings-section h3 {
  font-size: 1rem;
  margin-bottom: 16px;
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
}

.settings-row:last-child { border-bottom: none; }

.settings-info label {
  font-weight: 500;
  display: block;
  margin-bottom: 2px;
}

.settings-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== 主题选项按钮 ===== */
.theme-options {
  display: flex;
  gap: 8px;
}

.theme-opt {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 16px;
  background: var(--bg-tertiary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.8rem;
}

.theme-opt:hover { background: var(--bg-hover); }

.theme-opt.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
}

/* ===== 表单 ===== */
.input, .select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.input:focus, .select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

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

/* ===== 模态框 ===== */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal.active { display: flex; }

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  animation: modalIn 0.2s ease;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 { font-size: 1.2rem; }

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
}

.modal-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.modal-body { padding: 24px; }

.modal-footer {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  margin-top: 20px;
  padding: 16px 0 0 0;
}

.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  font-size: 0.9rem;
}

.form-hint {
  display: block;
  margin-top: 4px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== Toast 通知 ===== */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--info);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  min-width: 260px;
  animation: toastIn 0.3s ease;
}

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

@keyframes toastIn {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
  .chart-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main {
    margin-left: 0;
  }

  .menu-toggle {
    display: flex;
  }

  .content {
    padding: 16px;
  }

  .topbar {
    padding: 12px 16px;
  }

  .active-account { display: none; }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .chart-row {
    grid-template-columns: 1fr;
  }

  .chart-body {
    height: 280px;
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .filter-bar {
    width: 100%;
  }

  .filter-bar .select {
    flex: 1;
  }

  .data-actions {
    grid-template-columns: 1fr;
  }

  .accounts-grid {
    grid-template-columns: 1fr;
  }

  .settings-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}

@media (max-width: 480px) {
  html { font-size: 13px; }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .stat-value { font-size: 1.5rem; }

  .info-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .data-table th,
  .data-table td {
    padding: 10px 12px;
    font-size: 0.8rem;
  }
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ===== 加载状态 ===== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  color: var(--text-muted);
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}