/* ============================================
   Layout - 全局布局样式
   ============================================ */

/* 应用容器 */
#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* 顶部导航栏 */
.header {
  height: var(--header-height);
  background: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-page);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
  background: rgba(255, 255, 255, 0.95);
}

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

.ttup-brand {
  display: flex;
  align-items: center;
  gap: 7px;
  flex-shrink: 0;
}

.ttup-brand-img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
}

.ttup-brand-text {
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 2px;
  background: linear-gradient(90deg, #4CAF50 0%, #2196F3 55%, #FF5722 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.ttup-brand-divider {
  width: 1px;
  height: 20px;
  background: var(--color-border);
  margin: 0 6px;
  flex-shrink: 0;
}

.header-logo {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-tight);
}

.header-logo-icon {
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-tag);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

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

.header-user {
  display: flex;
  align-items: center;
  gap: var(--spacing-tight);
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
}

.header-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: var(--font-weight-medium);
}

.header-role-badge {
  font-size: var(--font-size-small);
  padding: 2px 8px;
  border-radius: var(--radius-tag);
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

.header-logout-btn {
  font-size: var(--font-size-small);
  color: var(--color-text-tertiary);
  padding: 6px 12px;
  border-radius: var(--radius-button);
  transition: all var(--transition-fast);
}

.header-logout-btn:hover {
  color: var(--color-danger);
  background: var(--color-danger-light);
}

.header-username-wrap {
  position: relative;
  cursor: pointer;
}

.header-username {
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  padding: 6px 10px;
  border-radius: var(--radius-button);
  transition: background var(--transition-fast);
  display: inline-block;
  user-select: none;
}

.header-username-wrap:hover .header-username {
  background: var(--color-bg-hover, #f5f5f5);
}

.user-dropdown {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
  min-width: 120px;
  z-index: 999;
  overflow: hidden;
}

.user-dropdown.show {
  display: block;
}

.user-dropdown-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 16px;
  font-size: var(--font-size-body);
  color: var(--color-text-primary);
  transition: background var(--transition-fast);
  white-space: nowrap;
}

.user-dropdown-item:hover {
  background: var(--color-bg-hover, #f5f5f5);
}

.user-dropdown-item-danger {
  color: var(--color-danger);
}

.user-dropdown-item-danger:hover {
  background: var(--color-danger-light);
}

.user-dropdown-divider {
  height: 1px;
  background: var(--color-border);
  margin: 4px 0;
}

/* 主内容区 */
.main-content {
  flex: 1;
  padding: var(--spacing-page);
  width: 100%;
}

/* 页面标题区 */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-section);
}

.page-title {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

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

/* 按钮通用样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: var(--radius-button);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  line-height: 1.4;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-white);
  box-shadow: var(--shadow-button);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 4px 8px rgba(227, 56, 25, 0.3);
}

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

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

.btn-danger {
  background: var(--color-danger);
  color: var(--color-text-white);
}

.btn-danger:hover {
  background: #d32f2f;
}

.btn-text {
  color: var(--color-text-secondary);
  padding: 4px 8px;
}

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

.btn-sm {
  padding: 4px 12px;
  font-size: var(--font-size-small);
}

.btn-lg {
  padding: 12px 28px;
  font-size: var(--font-size-h3);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn-loading {
  position: relative;
  color: transparent !important;
}

.btn-loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* 输入框通用样式 */
.input {
  width: 100%;
  min-width: 0;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-input);
  font-size: var(--font-size-body);
  color: var(--color-text-primary);
  background: var(--color-bg-card);
  transition: all var(--transition-fast);
}

.input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(227, 56, 25, 0.1);
}

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

.input-error {
  border-color: var(--color-danger) !important;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-label {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

.input-hint {
  font-size: var(--font-size-small);
  color: var(--color-text-tertiary);
}

.input-error-text {
  font-size: var(--font-size-small);
  color: var(--color-danger);
}

/* 表单布局 */
.form-group {
  margin-bottom: var(--spacing-component);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-component);
}

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

.form-section-title {
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-component);
  padding-bottom: var(--spacing-tight);
  border-bottom: 1px solid var(--color-border-light);
}

/* 标签通用样式 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: var(--radius-tag);
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  line-height: 1.6;
}

.tag-sm {
  padding: 1px 6px;
  font-size: 11px;
}

/* 搜索栏 */
.search-bar {
  display: flex;
  align-items: center;
  gap: var(--spacing-component);
  flex-wrap: wrap;
}

.search-input-wrapper {
  position: relative;
  flex: 1;
  min-width: 200px;
}

.search-input-wrapper .input {
  padding-left: 36px;
}

.search-input-wrapper .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-tertiary);
  font-size: 14px;
  pointer-events: none;
}

/* 加载更多 */
.load-more {
  text-align: center;
  padding: var(--spacing-card-gap);
  color: var(--color-text-tertiary);
  font-size: var(--font-size-small);
}

.load-more-btn {
  color: var(--color-primary);
  cursor: pointer;
  font-weight: var(--font-weight-medium);
}

.load-more-btn:hover {
  text-decoration: underline;
}

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-tertiary);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: var(--spacing-component);
  opacity: 0.5;
}

.empty-state-title {
  font-size: var(--font-size-h3);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-tight);
}

.empty-state-desc {
  font-size: var(--font-size-body);
}

/* 页面过渡 */
.page-enter {
  animation: pageEnter var(--transition-normal);
}

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