/**
 * 表单类页面共用样式（添加壁纸、添加分类等）
 * 中文注释：与 admin/shell.css 变量配合
 */
.admin-form-page {
  max-width: 800px;
}

.admin-form-page > .card {
  padding: 32px 36px;
}

.admin-form-page-header {
  margin-bottom: 28px;
}

.admin-form-page-header h1 {
  font-size: 20px;
  font-weight: 700;
  color: var(--admin-text);
  letter-spacing: -0.02em;
  margin: 0 0 6px;
}

.admin-form-page-header .sub {
  margin: 0;
  font-size: 14px;
  color: var(--admin-muted);
  line-height: 1.5;
}

.admin-form-section {
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--admin-border);
}

.admin-form-section:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.admin-form-section-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--admin-muted);
  margin: 0 0 14px;
}

.admin-form-group {
  margin-bottom: 22px;
}

.admin-form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--admin-text);
  margin-bottom: 8px;
}

.admin-form-group .hint {
  font-size: 12px;
  font-weight: 400;
  color: var(--admin-muted);
  margin-top: 6px;
}

.admin-form-control,
.admin-form-group input[type="text"],
.admin-form-group input[type="number"],
.admin-form-group select,
.admin-form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--admin-border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--admin-text);
  background: var(--admin-surface);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.admin-form-group textarea {
  min-height: 88px;
  resize: vertical;
}

.admin-form-control:focus,
.admin-form-group input:focus,
.admin-form-group select:focus,
.admin-form-group textarea:focus {
  outline: none;
  border-color: var(--admin-accent);
  box-shadow: 0 0 0 3px var(--admin-accent-soft);
}

.admin-form-upload {
  border: 2px dashed var(--admin-border);
  border-radius: var(--admin-radius);
  padding: 40px 28px;
  text-align: center;
  transition: border-color 0.15s, background 0.15s;
}

.admin-form-upload:hover {
  border-color: var(--admin-accent);
  background: var(--admin-surface-2);
}

.admin-form-upload input[type="file"] {
  display: none;
}

.admin-form-upload .btn-pick {
  display: inline-block;
  padding: 11px 28px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  background: linear-gradient(135deg, var(--admin-accent) 0%, var(--admin-accent-dark) 100%);
  color: #fff;
}

.admin-form-upload .btn-pick:hover {
  filter: brightness(1.05);
}

.admin-form-upload .tip {
  margin-top: 10px;
  font-size: 13px;
  color: var(--admin-muted);
}

.admin-form-row-split {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.admin-form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--admin-border);
}

.admin-btn {
  padding: 11px 22px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: opacity 0.15s, transform 0.1s;
}

.admin-btn:active {
  transform: scale(0.98);
}

.admin-btn-primary {
  background: linear-gradient(135deg, var(--admin-accent) 0%, var(--admin-accent-dark) 100%);
  color: #fff;
}

.admin-btn-secondary {
  background: var(--admin-surface-2);
  color: var(--admin-text);
  border: 1px solid var(--admin-border);
}

.admin-form-toggle .toggle-switch input:checked + .toggle-slider {
  background-color: var(--admin-accent) !important;
}

.status-message {
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 18px;
  display: none;
}

.status-message.success {
  background: #ecfdf5;
  color: #166534;
  border: 1px solid #a7f3d0;
  display: block;
}

.status-message.error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
  display: block;
}

.admin-upload-preview {
  margin-top: 16px;
  display: none;
}

.admin-upload-preview.show {
  display: block;
}

.admin-upload-preview img {
  max-width: 240px;
  max-height: 240px;
  border-radius: 8px;
  border: 1px solid var(--admin-border);
}

@media (max-width: 640px) {
  .admin-form-page {
    max-width: none;
  }
}