/* ===================================================================
   components.css - 通用UI组件样式
   使用 ds token 变量，支持亮/暗色自动切换
   =================================================================== */

/* =================================================================
   Card 卡片
   ================================================================= */
.ds-card {
  background: var(--ds-bg-surface);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-lg);
  box-shadow: var(--ds-shadow-xs);
  padding: var(--ds-space-4);
}
.ds-card-raised {
  background: var(--ds-bg-surface-raised);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-lg);
  box-shadow: var(--ds-shadow-md);
  padding: var(--ds-space-4);
}
.ds-card-interactive {
  background: var(--ds-bg-surface);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-lg);
  box-shadow: var(--ds-shadow-xs);
  padding: var(--ds-space-4);
  cursor: pointer;
  transition: box-shadow var(--ds-transition-fast),
              transform var(--ds-transition-fast),
              border-color var(--ds-transition-fast);
}
.ds-card-interactive:hover {
  box-shadow: var(--ds-shadow-md);
  border-color: var(--ds-border-emphasis);
  transform: translateY(-1px);
}
.ds-card-flush {
  background: var(--ds-bg-surface);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-lg);
  box-shadow: var(--ds-shadow-xs);
  padding: 0;
  overflow: hidden;
}

/* Glass morphism */
.ds-glass {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}
[data-theme="dark"] .ds-glass {
  background: rgba(26, 34, 51, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* =================================================================
   Button 按钮
   ================================================================= */
.ds-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--ds-space-2);
  padding: var(--ds-space-2) var(--ds-space-4);
  font-size: var(--ds-text-sm);
  font-weight: var(--ds-font-medium);
  line-height: 1;
  min-height: var(--ds-touch-min);
  border-radius: var(--ds-radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--ds-transition-fast);
  white-space: nowrap;
  user-select: none;
}
.ds-btn:active {
  transform: scale(0.97);
}
.ds-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Primary */
.ds-btn-primary {
  background: var(--ds-accent);
  color: var(--ds-text-inverse);
  border-color: var(--ds-accent);
}
.ds-btn-primary:hover:not(:disabled) {
  background: var(--ds-accent-hover);
  border-color: var(--ds-accent-hover);
}

/* Secondary */
.ds-btn-secondary {
  background: var(--ds-bg-surface);
  color: var(--ds-text-primary);
  border-color: var(--ds-border);
}
.ds-btn-secondary:hover:not(:disabled) {
  background: var(--ds-bg-muted);
  border-color: var(--ds-border-emphasis);
}

/* Ghost */
.ds-btn-ghost {
  background: transparent;
  color: var(--ds-text-secondary);
  border-color: transparent;
}
.ds-btn-ghost:hover:not(:disabled) {
  background: var(--ds-bg-muted);
  color: var(--ds-text-primary);
}

/* Danger */
.ds-btn-danger {
  background: var(--ds-danger);
  color: #ffffff;
  border-color: var(--ds-danger);
}
.ds-btn-danger:hover:not(:disabled) {
  background: var(--ds-danger-text);
  border-color: var(--ds-danger-text);
}

/* Outline */
.ds-btn-outline {
  background: transparent;
  color: var(--ds-accent-text);
  border-color: var(--ds-accent);
}
.ds-btn-outline:hover:not(:disabled) {
  background: var(--ds-accent-subtle);
}

/* Small */
.ds-btn-sm {
  padding: var(--ds-space-1) var(--ds-space-3);
  font-size: var(--ds-text-xs);
  min-height: 32px;
}

/* Extra small */
.ds-btn-xs {
  padding: 2px 8px;
  font-size: 11px;
  min-height: 22px;
  line-height: 1.4;
}

/* Icon button */
.ds-btn-icon {
  padding: var(--ds-space-2);
  min-width: var(--ds-touch-min);
}

/* =================================================================
   Badge 徽章
   ================================================================= */
.ds-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--ds-space-1);
  padding: 2px var(--ds-space-2);
  font-size: var(--ds-text-xs);
  font-weight: var(--ds-font-medium);
  line-height: 1.5;
  border-radius: var(--ds-radius-full);
  white-space: nowrap;
}
.ds-badge-default {
  background: var(--ds-bg-muted);
  color: var(--ds-text-secondary);
}
.ds-badge-accent {
  background: var(--ds-accent-subtle);
  color: var(--ds-accent-text);
}
.ds-badge-success {
  background: var(--ds-success-subtle);
  color: var(--ds-success-text);
}
.ds-badge-warning {
  background: var(--ds-warning-subtle);
  color: var(--ds-warning-text);
}
.ds-badge-danger {
  background: var(--ds-danger-subtle);
  color: var(--ds-danger-text);
}
.ds-badge-info {
  background: var(--ds-info-subtle);
  color: var(--ds-info-text);
}

/* =================================================================
   Form Controls 表单控件
   ================================================================= */
.ds-input,
.ds-select,
.ds-textarea {
  display: block;
  width: 100%;
  padding: var(--ds-space-2) var(--ds-space-3);
  font-size: var(--ds-text-base);
  font-family: var(--ds-font);
  line-height: var(--ds-leading-normal);
  color: var(--ds-text-primary);
  background: var(--ds-bg-surface);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-md);
  transition: border-color var(--ds-transition-fast),
              box-shadow var(--ds-transition-fast);
  outline: none;
}
.ds-input:focus,
.ds-select:focus,
.ds-textarea:focus {
  border-color: var(--ds-accent);
  box-shadow: 0 0 0 3px var(--ds-accent-subtle);
}
.ds-input::placeholder,
.ds-textarea::placeholder {
  color: var(--ds-text-muted);
}
.ds-input:disabled,
.ds-select:disabled,
.ds-textarea:disabled {
  background: var(--ds-bg-muted);
  color: var(--ds-text-disabled);
  cursor: not-allowed;
}
.ds-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M4.646 5.646a.5.5 0 01.708 0L8 8.293l2.646-2.647a.5.5 0 01.708.708l-3 3a.5.5 0 01-.708 0l-3-3a.5.5 0 010-.708z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--ds-space-3) center;
  padding-right: var(--ds-space-10);
}
.ds-textarea {
  resize: vertical;
  min-height: 80px;
}

/* =================================================================
   Table 表格
   ================================================================= */
.ds-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--ds-text-sm);
}
.ds-table th {
  text-align: left;
  font-weight: var(--ds-font-semibold);
  color: var(--ds-text-secondary);
  padding: var(--ds-space-2) var(--ds-space-3);
  border-bottom: 2px solid var(--ds-border);
  white-space: nowrap;
  user-select: none;
}
.ds-table th[data-sortable] {
  cursor: pointer;
}
.ds-table th[data-sortable]:hover {
  color: var(--ds-text-primary);
}
.ds-table td {
  padding: var(--ds-space-2) var(--ds-space-3);
  border-bottom: 1px solid var(--ds-border-subtle);
  color: var(--ds-text-primary);
  vertical-align: middle;
}
.ds-table tr:hover td {
  background: var(--ds-bg-muted);
}
.ds-table-dense th,
.ds-table-dense td {
  padding: var(--ds-space-1) var(--ds-space-2);
}

/* =================================================================
   Modal / Dialog 模态框
   ================================================================= */
.ds-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--ds-z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--ds-space-4);
  opacity: 0;
  transition: opacity var(--ds-transition-base);
  pointer-events: none;
}
.ds-modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
.ds-modal {
  background: var(--ds-bg-surface);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-xl);
  box-shadow: var(--ds-shadow-xl);
  width: 100%;
  max-width: 520px;
  max-height: calc(100vh - var(--ds-space-8));
  overflow-y: auto;
  transform: scale(0.95);
  transition: transform var(--ds-transition-base);
}
.ds-modal-overlay.open .ds-modal {
  transform: scale(1);
}
.ds-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--ds-space-4) var(--ds-space-5);
  border-bottom: 1px solid var(--ds-border-subtle);
}
.ds-modal-header h3 {
  font-size: var(--ds-text-md);
  font-weight: var(--ds-font-semibold);
  color: var(--ds-text-primary);
  margin: 0;
}
.ds-modal-body {
  padding: var(--ds-space-5);
}
.ds-modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--ds-space-2);
  padding: var(--ds-space-4) var(--ds-space-5);
  border-top: 1px solid var(--ds-border-subtle);
}

/* =================================================================
   Drawer 抽屉
   ================================================================= */
.ds-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: var(--ds-z-overlay);
  opacity: 0;
  transition: opacity var(--ds-transition-base);
  pointer-events: none;
}
.ds-drawer-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
.ds-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(520px, calc(100vw - var(--ds-space-8)));
  background: var(--ds-bg-surface);
  border-left: 1px solid var(--ds-border);
  box-shadow: var(--ds-shadow-xl);
  z-index: var(--ds-z-overlay);
  transform: translateX(100%);
  transition: transform 240ms cubic-bezier(0.32, 0.72, 0, 1);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.ds-drawer.open {
  transform: translateX(0);
}
.ds-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--ds-space-4) var(--ds-space-5);
  border-bottom: 1px solid var(--ds-border-subtle);
  flex-shrink: 0;
}
.ds-drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--ds-space-5);
}

/* =================================================================
   Tabs 标签页
   ================================================================= */
.ds-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--ds-border);
}
.ds-tab {
  padding: var(--ds-space-2) var(--ds-space-4);
  font-size: var(--ds-text-sm);
  font-weight: var(--ds-font-medium);
  color: var(--ds-text-muted);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color var(--ds-transition-fast),
              border-color var(--ds-transition-fast);
  white-space: nowrap;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}
.ds-tab:hover {
  color: var(--ds-text-primary);
}
.ds-tab.active {
  color: var(--ds-accent-text);
  border-bottom-color: var(--ds-accent);
}

/* =================================================================
   Toast 提示
   ================================================================= */
.ds-toast {
  display: flex;
  align-items: center;
  gap: var(--ds-space-2);
  padding: var(--ds-space-3) var(--ds-space-4);
  border-radius: var(--ds-radius-lg);
  box-shadow: var(--ds-shadow-lg);
  font-size: var(--ds-text-sm);
  color: #ffffff;
  animation: ds-toast-in 200ms ease-out;
  max-width: 380px;
}
@keyframes ds-toast-in {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}
.ds-toast-success { background: var(--ds-success); }
.ds-toast-error { background: var(--ds-danger); }
.ds-toast-warning { background: var(--ds-warning); }
.ds-toast-info { background: var(--ds-info); }

/* =================================================================
   Tooltip 工具提示
   ================================================================= */
.ds-tooltip {
  position: relative;
}
.ds-tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--ds-space-1) var(--ds-space-2);
  font-size: var(--ds-text-xs);
  color: var(--ds-text-inverse);
  background: var(--ds-text-primary);
  border-radius: var(--ds-radius-sm);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--ds-transition-fast);
  z-index: var(--ds-z-dropdown);
}
.ds-tooltip:hover::after {
  opacity: 1;
}

/* =================================================================
   Dropdown Menu 下拉菜单
   ================================================================= */
.ds-dropdown {
  position: relative;
  display: inline-block;
}
.ds-dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  min-width: 180px;
  background: var(--ds-bg-surface);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-lg);
  box-shadow: var(--ds-shadow-lg);
  padding: var(--ds-space-1);
  z-index: var(--ds-z-dropdown);
  opacity: 0;
  transform: scale(0.95) translateY(-4px);
  transition: opacity var(--ds-transition-fast),
              transform var(--ds-transition-fast);
  pointer-events: none;
}
.ds-dropdown-menu.open {
  opacity: 1;
  transform: scale(1) translateY(0);
  pointer-events: auto;
}
.ds-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--ds-space-2);
  padding: var(--ds-space-2) var(--ds-space-3);
  font-size: var(--ds-text-sm);
  color: var(--ds-text-primary);
  border-radius: var(--ds-radius-sm);
  cursor: pointer;
  transition: background var(--ds-transition-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}
.ds-dropdown-item:hover {
  background: var(--ds-bg-muted);
}
.ds-dropdown-divider {
  height: 1px;
  background: var(--ds-border-subtle);
  margin: var(--ds-space-1) 0;
}

/* =================================================================
   Breadcrumb 面包屑
   ================================================================= */
.ds-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--ds-space-1);
  font-size: var(--ds-text-sm);
  color: var(--ds-text-muted);
}
.ds-breadcrumb a {
  color: var(--ds-text-muted);
  text-decoration: none;
  transition: color var(--ds-transition-fast);
}
.ds-breadcrumb a:hover {
  color: var(--ds-text-primary);
  text-decoration: none;
}
.ds-breadcrumb-sep::before {
  content: "/";
  margin: 0 var(--ds-space-1);
  color: var(--ds-text-disabled);
}
.ds-breadcrumb-current {
  color: var(--ds-text-primary);
  font-weight: var(--ds-font-medium);
}

/* =================================================================
   Empty State 空状态
   ================================================================= */
.ds-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--ds-space-12) var(--ds-space-4);
  text-align: center;
  color: var(--ds-text-muted);
}
.ds-empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: var(--ds-space-4);
  opacity: 0.4;
}
.ds-empty-state-title {
  font-size: var(--ds-text-md);
  font-weight: var(--ds-font-medium);
  color: var(--ds-text-secondary);
  margin-bottom: var(--ds-space-2);
}
.ds-empty-state-desc {
  font-size: var(--ds-text-sm);
  max-width: 320px;
}

/* =================================================================
   Progress 进度条
   ================================================================= */
.ds-progress {
  height: 6px;
  background: var(--ds-bg-muted);
  border-radius: var(--ds-radius-full);
  overflow: hidden;
}
.ds-progress-bar {
  height: 100%;
  background: var(--ds-accent);
  border-radius: var(--ds-radius-full);
  transition: width var(--ds-transition-slow);
}

/* =================================================================
   Avatar 头像
   ================================================================= */
.ds-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--ds-radius-full);
  background: var(--ds-accent-subtle);
  color: var(--ds-accent-text);
  font-size: var(--ds-text-xs);
  font-weight: var(--ds-font-semibold);
  flex-shrink: 0;
}
.ds-avatar-sm {
  width: 24px;
  height: 24px;
  font-size: 10px;
}
.ds-avatar-lg {
  width: 40px;
  height: 40px;
  font-size: var(--ds-text-sm);
}

/* =================================================================
   Divider 分割线
   ================================================================= */
.ds-divider {
  height: 1px;
  background: var(--ds-border);
  border: none;
  margin: var(--ds-space-4) 0;
}

/* =================================================================
   Responsive utilities
   ================================================================= */
@media (max-width: 639px) {
  .ds-hide-mobile { display: none !important; }
  .ds-drawer {
    width: 100%;
    border-left: none;
  }
}
@media (min-width: 640px) {
  .ds-hide-desktop { display: none !important; }
}