/**
 * 组件样式
 * 按钮、表单、卡片、表格、模态框等
 */

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  min-height: 36px;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.5;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--color-surface);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-surface-muted);
}

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

.btn-danger:hover:not(:disabled) {
  background: #dc2626;
}

.btn-sm {
  min-height: 28px;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--text-xs);
}

.btn-lg {
  min-height: 44px;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--text-base);
}

.btn-icon {
  width: 36px;
  padding: 0;
}

.btn-icon.btn-sm {
  width: 28px;
}

.btn-icon.btn-lg {
  width: 44px;
}

.btn-group {
  display: inline-flex;
}

.btn-group .btn:not(:last-child) {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.btn-group .btn:not(:first-child) {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  margin-left: -1px;
}

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

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

.form-label.required::after {
  content: '*';
  color: var(--color-danger);
  margin-left: var(--spacing-xs);
}

.form-input {
  width: 100%;
  min-height: 40px;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--glass-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input:disabled {
  background: var(--color-surface-muted);
  cursor: not-allowed;
}

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

.form-input.error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-hint {
  margin-top: var(--spacing-xs);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.form-error {
  margin-top: var(--spacing-xs);
  font-size: var(--text-xs);
  color: var(--color-danger);
}

/* 文本域 */
textarea.form-input {
  min-height: 100px;
  resize: vertical;
}

/* 选择框 */
select.form-input {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236b7280'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-sm) center;
  background-size: 1.25rem;
  padding-right: 2.5rem;
}

/* 复选框和单选框 */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

.form-check-label {
  font-size: var(--text-sm);
  color: var(--color-text);
}

/* ============ 卡片 ============ */
.card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
}

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

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

.card-subtitle {
  margin-top: var(--spacing-xs);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

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

.card-footer {
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
  background: var(--color-surface-muted);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

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

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

.table th,
.table td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}

.table th {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--glass-bg);
  white-space: nowrap;
}

.table td {
  font-size: var(--text-sm);
  color: var(--color-text);
}

.table tbody tr:hover {
  background: var(--color-surface-muted);
}

.table tbody tr:nth-child(even) {
  background: rgba(0, 0, 0, 0.02);
}

.dark .table tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

/* 表格状态列 */
.table .col-status {
  text-align: center;
}

.table .col-action {
  text-align: center;
  white-space: nowrap;
}

/* ============ 徽章 ============ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
}

.badge-success {
  background: var(--color-success-bg);
  color: var(--color-success-text);
}

.badge-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning-text);
}

.badge-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger-text);
}

.badge-info {
  background: var(--color-info-bg);
  color: var(--color-info-text);
}

.badge-muted {
  background: var(--color-surface-muted);
  color: var(--color-text-muted);
}

/* ============ 提示框 ============ */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  border-radius: var(--radius);
  font-size: var(--text-sm);
}

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

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

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

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

/* ============ 模态框 ============ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal-backdrop);
  animation: fadeIn 0.2s ease;
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-modal);
  animation: scaleIn 0.2s ease;
  overflow: hidden;
}

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

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

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  color: var(--color-text-muted);
  transition: background var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-surface-muted);
}

.modal-body {
  padding: var(--spacing-lg);
  overflow-y: auto;
  max-height: calc(90vh - 140px);
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
  background: var(--color-surface-muted);
}

/* ============ Toast 通知 ============ */
.toast-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: slideIn 0.3s ease;
}

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

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

.toast.toast-danger {
  border-left: 4px solid var(--color-danger);
}

.toast.toast-info {
  border-left: 4px solid var(--color-info);
}

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

.toast-message {
  font-size: var(--text-sm);
  color: var(--color-text);
}

.toast-close {
  margin-left: var(--spacing-md);
  color: var(--color-text-muted);
  cursor: pointer;
}

/* ============ 分页 ============ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.pagination-item {
  min-width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  border-radius: var(--radius);
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pagination-item:hover:not(.active):not(.disabled) {
  background: var(--color-surface-muted);
}

.pagination-item.active {
  background: var(--color-primary);
  color: white;
}

.pagination-item.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ============ 空状态 ============ */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-2xl);
  text-align: center;
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-light);
}

.empty-state-title {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.empty-state-description {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
}

/* ============ 加载状态 ============ */
.loading-spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-spinner-sm {
  width: 16px;
  height: 16px;
}

.loading-spinner-lg {
  width: 40px;
  height: 40px;
  border-width: 3px;
}

.loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.8);
  z-index: 10;
}

.dark .loading-overlay {
  background: rgba(15, 23, 42, 0.8);
}

/* ============ 下拉菜单 ============ */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 180px;
  padding: var(--spacing-xs) 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-dropdown);
  animation: slideIn 0.15s ease;
}

.dropdown-menu.right {
  left: auto;
  right: 0;
}

.dropdown-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);
  cursor: pointer;
  transition: background var(--transition-fast);
}

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

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

.dropdown-divider {
  height: 1px;
  margin: var(--spacing-xs) 0;
  background: var(--color-border-light);
}