/**
 * 布局样式
 * 页面结构、侧边栏、头部等
 */

/* ============ 页面布局 ============ */
.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-content {
  flex: 1;
  padding: var(--spacing-lg);
}

/* 登录/注册页面布局 */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
}

.auth-container {
  width: 100%;
  max-width: 420px;
}

.auth-logo {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.auth-logo-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--spacing-md);
}

.auth-logo-text {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
}

.auth-card {
  padding: var(--spacing-xl);
}

.auth-footer {
  text-align: center;
  margin-top: var(--spacing-lg);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ============ 后台布局 ============ */
.admin-layout {
  display: flex;
  min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
  width: 240px;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border-light);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.sidebar-logo-icon {
  width: 32px;
  height: 32px;
}

.sidebar-logo-text {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
}

.sidebar-nav {
  flex: 1;
  padding: var(--spacing-md);
  overflow-y: auto;
}

.nav-section {
  margin-bottom: var(--spacing-md);
}

.nav-section-title {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--text-sm);
  color: var(--color-text);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.nav-item:hover {
  background: var(--color-surface-muted);
  color: var(--color-primary);
}

.nav-item.active {
  background: rgba(37, 99, 235, 0.1);
  color: var(--color-primary);
}

.nav-item-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.nav-badge {
  margin-left: auto;
  padding: 2px 6px;
  font-size: var(--text-xs);
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-full);
}

/* 主内容区 */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* 头部 */
.header {
  height: 60px;
  padding: 0 var(--spacing-lg);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.header-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
}

.header-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.header-breadcrumb-separator {
  color: var(--color-text-light);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.header-action {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.header-action:hover {
  background: var(--color-surface-muted);
  color: var(--color-text);
}

.header-user {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.header-user:hover {
  background: var(--color-surface-muted);
}

.header-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: 500;
}

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

/* 页面主体 */
.page-main {
  flex: 1;
  padding: var(--spacing-lg);
  overflow-y: auto;
}

/* ============ 页面头部 ============ */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
}

.page-header-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.page-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
}

.page-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.page-header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* ============ 列表页 ============ */
.list-page {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.list-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.list-search {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex: 1;
  max-width: 400px;
}

.list-search-input {
  flex: 1;
}

.list-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.list-card {
  overflow: hidden;
}

.list-table {
  width: 100%;
}

.list-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
}

.list-info {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ============ 详情页 ============ */
.detail-page {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.detail-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.detail-title {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
}

.detail-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-sm);
}

.detail-meta-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.detail-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.detail-section {
  padding: var(--spacing-lg);
}

.detail-section-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border-light);
}

.detail-field {
  display: flex;
  margin-bottom: var(--spacing-md);
}

.detail-field-label {
  width: 120px;
  flex-shrink: 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.detail-field-value {
  flex: 1;
  font-size: var(--text-sm);
  color: var(--color-text);
}

/* ============ 表单页 ============ */
.form-page {
  max-width: 800px;
  margin: 0 auto;
}

.form-card {
  padding: var(--spacing-xl);
}

.form-section {
  margin-bottom: var(--spacing-xl);
}

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

.form-section-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border-light);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.form-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
}

/* ============ 工作台/仪表盘 ============ */
.dashboard-page {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-md);
}

.stat-card {
  padding: var(--spacing-lg);
}

.stat-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
}

.stat-card-title {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.stat-card-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  background: rgba(37, 99, 235, 0.1);
  color: var(--color-primary);
}

.stat-card-value {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
}

.stat-card-change {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
  font-size: var(--text-sm);
}

.stat-card-change.positive {
  color: var(--color-success);
}

.stat-card-change.negative {
  color: var(--color-danger);
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--spacing-md);
}

.dashboard-col-8 {
  grid-column: span 8;
}

.dashboard-col-4 {
  grid-column: span 4;
}

.dashboard-col-6 {
  grid-column: span 6;
}

.dashboard-col-12 {
  grid-column: span 12;
}

/* ============ 首页 ============ */
.home-page {
  padding: var(--spacing-2xl);
  text-align: center;
}

.home-hero {
  max-width: 600px;
  margin: 0 auto var(--spacing-2xl);
}

.home-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

.home-description {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xl);
}

.home-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
}

.home-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  max-width: 1000px;
  margin: 0 auto;
}

.feature-card {
  padding: var(--spacing-xl);
  text-align: left;
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background: rgba(37, 99, 235, 0.1);
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.feature-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.feature-description {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}