/* 组件样式 - components.css */
/* 基于BEM命名规范 */

/* ==================== 按钮组件 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-normal);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-base);
  text-decoration: none;
  user-select: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: white;
  box-shadow: var(--shadow-primary);
}

.btn--primary:hover {
  box-shadow: var(--shadow-primary-hover);
}

.btn--secondary {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-light) 100%);
  color: white;
}

.btn--success {
  background: linear-gradient(135deg, var(--color-success) 0%, var(--color-success-light) 100%);
  color: white;
}

.btn--warning {
  background: linear-gradient(135deg, var(--color-warning) 0%, var(--color-warning-light) 100%);
  color: white;
}

.btn--danger {
  background: linear-gradient(135deg, var(--color-danger) 0%, var(--color-danger-light) 100%);
  color: white;
}

.btn--outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text-secondary);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

.btn--ghost:hover {
  background: var(--color-bg-hover);
}

.btn--sm {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-base);
}

.btn--lg {
  padding: var(--spacing-lg) var(--spacing-xxl);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-xl);
}

.btn--icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn--icon.btn--sm {
  width: 32px;
  height: 32px;
}

.btn--icon.btn--lg {
  width: 48px;
  height: 48px;
}

.btn__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn__icon--left {
  margin-right: var(--spacing-sm);
}

.btn__icon--right {
  margin-left: var(--spacing-sm);
}

.btn__loading {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ==================== 卡片组件 ==================== */
.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-base);
  overflow: hidden;
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card--hover {
  cursor: pointer;
}

.card--hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

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

.card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin: 0;
}

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

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

.card__footer {
  padding: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-md);
}

.card--no-padding .card__body {
  padding: 0;
}

/* 统计卡片 */
.stat-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-xl);
  display: flex;
  align-items: center;
  box-shadow: var(--shadow-base);
  transition: all var(--transition-base);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stat-card__icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-right: var(--spacing-lg);
}

.stat-card__icon--primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: white;
}

.stat-card__icon--success {
  background: linear-gradient(135deg, var(--color-success) 0%, var(--color-success-light) 100%);
  color: white;
}

.stat-card__icon--warning {
  background: linear-gradient(135deg, var(--color-warning) 0%, var(--color-warning-light) 100%);
  color: white;
}

.stat-card__icon--danger {
  background: linear-gradient(135deg, var(--color-danger) 0%, var(--color-danger-light) 100%);
  color: white;
}

.stat-card__info {
  flex: 1;
}

.stat-card__value {
  font-size: 32px;
  font-weight: var(--font-weight-extrabold);
  color: var(--color-text-primary);
  line-height: var(--line-height-tight);
}

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

.stat-card__trend {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  margin-top: var(--spacing-xs);
}

.stat-card__trend--up {
  background: rgba(82, 196, 26, 0.1);
  color: var(--color-success);
}

.stat-card__trend--down {
  background: rgba(255, 77, 79, 0.1);
  color: var(--color-danger);
}

/* ==================== 表格组件 ==================== */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-base);
}

.table__header {
  background: var(--color-bg-hover);
}

.table__header th {
  padding: var(--spacing-lg) var(--spacing-xl);
  text-align: left;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.table__body tr {
  transition: background var(--transition-fast);
}

.table__body tr:hover {
  background: var(--color-bg-hover);
}

.table__body td {
  padding: var(--spacing-lg) var(--spacing-xl);
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.table--striped .table__body tr:nth-child(even) {
  background: var(--color-bg-hover);
}

.table--bordered {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.table--bordered th:first-child,
.table--bordered td:first-child {
  border-left: none;
}

.table--bordered th:last-child,
.table--bordered td:last-child {
  border-right: none;
}

.table__header th:last-child {
  text-align: center;
}

.table__actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  align-items: center;
}

/* 表格响应式 */
.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* ==================== 搜索栏组件 ==================== */
.search-bar {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.search-bar .form-control {
  width: auto;
  min-width: 180px;
}

.filter-bar {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

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

.form-row {
  display: flex;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.form-row .form-group {
  flex: 1;
  margin-bottom: 0;
}

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

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

.form-control {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-base);
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
  background: var(--color-bg-card);
  color: var(--color-text-primary);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-bg);
}

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

.form-control--error:focus {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 4px rgba(255, 77, 79, 0.1);
}

.form-control--success {
  border-color: var(--color-success);
}

.form-control--success:focus {
  border-color: var(--color-success);
  box-shadow: 0 0 0 4px rgba(82, 196, 26, 0.1);
}

.form-control--sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
}

.form-control--with-icon {
  padding-left: 48px;
}

.form-control-wrapper {
  position: relative;
}

.form-control-icon {
  position: absolute;
  left: var(--spacing-lg);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  pointer-events: none;
}

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

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

/* 选择框 */
.select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-lg) center;
  background-size: 16px;
  padding-right: var(--spacing-xxl);
}

/* 复选框和单选框 */
.checkbox,
.radio {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  user-select: none;
}

.checkbox input,
.radio input {
  width: 18px;
  height: 18px;
  margin: 0;
}

.checkbox__label,
.radio__label {
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
}

/* ==================== 徽章组件 ==================== */
.badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-base);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

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

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

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

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

.badge--purple {
  background: rgba(146, 84, 222, 0.1);
  color: var(--color-purple);
}

.badge--cyan {
  background: rgba(19, 194, 194, 0.1);
  color: var(--color-cyan);
}

.badge--default {
  background: var(--color-bg-hover);
  color: var(--color-text-muted);
}

.badge--sm {
  padding: 2px var(--spacing-sm);
  font-size: 10px;
}

.badge--lg {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-sm);
}

/* ==================== 警告组件 ==================== */
.alert {
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.alert__icon {
  font-size: var(--font-size-xl);
  flex-shrink: 0;
}

.alert__content {
  flex: 1;
}

.alert__title {
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
}

.alert__message {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
}

.alert--success {
  background: var(--color-success-bg);
  border: 1px solid rgba(82, 196, 26, 0.2);
  color: var(--color-success);
}

.alert--warning {
  background: var(--color-warning-bg);
  border: 1px solid rgba(250, 173, 20, 0.2);
  color: var(--color-warning);
}

.alert--danger {
  background: var(--color-danger-bg);
  border: 1px solid rgba(255, 77, 79, 0.2);
  color: var(--color-danger);
}

.alert--info {
  background: var(--color-info-bg);
  border: 1px solid rgba(74, 159, 245, 0.2);
  color: var(--color-info);
}

/* ==================== 模态框组件 ==================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: none;
  z-index: var(--z-index-modal);
  backdrop-filter: blur(4px);
  animation: fadeIn var(--transition-base);
}

.modal-overlay--visible {
  display: block;
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  background: var(--color-bg-card);
  border-radius: var(--radius-2xl);
  width: 560px;
  max-width: 90vw;
  max-height: 90vh;
  display: none;
  z-index: calc(var(--z-index-modal) + 1);
  box-shadow: var(--shadow-xl);
}

.modal--visible {
  display: block;
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
  animation: modalSlideIn var(--transition-base) forwards;
}

.modal--sm {
  width: 400px;
}

.modal--lg {
  width: 720px;
}

.modal--xl {
  width: 960px;
}

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

.modal__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin: 0;
}

.modal__close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--color-bg-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
  border: none;
  padding: 0;
}

.modal__close:hover {
  background: var(--color-bg-active);
  color: var(--color-text-primary);
}

.modal__body {
  padding: var(--spacing-xl);
  max-height: 60vh;
  overflow-y: auto;
}

.modal__footer {
  padding: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-md);
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

/* ==================== 加载组件 ==================== */
.loading {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
}

.loading__spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 107, 53, 0.3);
  border-radius: 50%;
  border-top-color: var(--color-primary);
  animation: spin 1s linear infinite;
}

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

.loading--center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.loading--full {
  width: 100%;
  height: 100%;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ==================== 空状态组件 ==================== */
.empty-state {
  text-align: center;
  padding: var(--spacing-xxl);
}

.empty-state__icon {
  font-size: 48px;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
  opacity: 0.5;
}

.empty-state__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.empty-state__description {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

/* ==================== 分页组件 ==================== */
.pagination {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  list-style: none;
  padding: 0;
  margin: 0;
}

.pagination__item {
  display: inline-flex;
}

.pagination__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 var(--spacing-sm);
  border-radius: var(--radius-base);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

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

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

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

.pagination__link--disabled:hover {
  background: transparent;
  color: var(--color-text-secondary);
}

/* ==================== 面包屑导航 ==================== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  list-style: none;
  padding: 0;
  margin: 0 0 var(--spacing-lg) 0;
}

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

.breadcrumb__link {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb__link:hover {
  color: var(--color-primary);
}

.breadcrumb__separator {
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

.breadcrumb__item:last-child .breadcrumb__link {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-semibold);
}

.breadcrumb__item:last-child .breadcrumb__separator {
  display: none;
}