:root {
  --dh-primary: #534AB7;
  --dh-primary-light: #EEEDFE;
  --dh-primary-dark: #3C3489;
  --dh-secondary: #7F77DD;
  --dh-bg: #f5f5f7;
  --dh-card: #ffffff;
  --dh-border: #e8e8ed;
  --dh-text: #1d1d1f;
  --dh-text-secondary: #6e6e73;
  --dh-text-tertiary: #aeaeb2;
  --dh-radius: 12px;
  --dh-radius-sm: 8px;
  --dh-shadow: 0 1px 3px rgba(0,0,0,0.06);
  --dh-shadow-hover: 0 4px 12px rgba(0,0,0,0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--dh-bg);
  color: var(--dh-text);
  font-size: 14px;
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
}

.dh-navbar {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--dh-border);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.dh-logo {
  font-size: 20px;
  font-weight: 600;
  color: var(--dh-primary);
  letter-spacing: -0.5px;
}

.dh-nav-link {
  color: var(--dh-text-secondary);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--dh-radius-sm);
  transition: all 0.2s;
  cursor: pointer;
}

.dh-nav-link:hover {
  color: var(--dh-primary);
  background: var(--dh-primary-light);
}

.dh-nav-link.active {
  color: var(--dh-primary);
  background: var(--dh-primary-light);
}

.dh-btn-primary {
  background: var(--dh-primary);
  color: #fff;
  border: none;
  padding: 8px 20px;
  border-radius: var(--dh-radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.dh-btn-primary:hover {
  background: var(--dh-primary-dark);
  color: #fff;
}

.dh-btn-outline {
  background: transparent;
  color: var(--dh-primary);
  border: 1px solid var(--dh-primary);
  padding: 7px 20px;
  border-radius: var(--dh-radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.dh-btn-outline:hover {
  background: var(--dh-primary-light);
}

.dh-card {
  background: var(--dh-card);
  border: 1px solid var(--dh-border);
  border-radius: var(--dh-radius);
  box-shadow: var(--dh-shadow);
  transition: box-shadow 0.2s, transform 0.2s;
}

.dh-card:hover {
  box-shadow: var(--dh-shadow-hover);
  transform: translateY(-2px);
}

.dh-site-card {
  background: var(--dh-card);
  border: 1px solid var(--dh-border);
  border-radius: var(--dh-radius-sm);
  padding: 16px;
  cursor: pointer;
  transition: all 0.2s;
}

.dh-site-card:hover {
  border-color: var(--dh-primary);
  box-shadow: var(--dh-shadow-hover);
  transform: translateY(-2px);
}

.dh-site-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 600;
  flex-shrink: 0;
}

.dh-section-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--dh-text);
  margin: 0;
}

.dh-badge {
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 10px;
  font-weight: 500;
}

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

.dh-search-input {
  background: var(--dh-bg);
  border: 1px solid var(--dh-border);
  border-radius: 20px;
  padding: 8px 16px 8px 40px;
  font-size: 13px;
  width: 240px;
  transition: all 0.2s;
}

.dh-search-input:focus {
  outline: none;
  border-color: var(--dh-primary);
  background: #fff;
  width: 280px;
}

.dh-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--dh-primary-light);
  color: var(--dh-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
  flex-shrink: 0;
}

.dh-sidebar {
  background: var(--dh-card);
  border-right: 1px solid var(--dh-border);
  min-height: calc(100vh - 56px);
  padding: 16px 0;
}

.dh-sidebar-item {
  display: block;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--dh-text-secondary);
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: all 0.2s;
}

.dh-sidebar-item:hover {
  background: var(--dh-bg);
  color: var(--dh-text);
}

.dh-sidebar-item.active {
  background: var(--dh-primary-light);
  color: var(--dh-primary);
  font-weight: 500;
  border-left-color: var(--dh-primary);
}

.dh-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.dh-table th {
  text-align: left;
  padding: 12px 16px;
  font-weight: 500;
  color: var(--dh-text-secondary);
  border-bottom: 1px solid var(--dh-border);
  background: var(--dh-bg);
}

.dh-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--dh-border);
}

.dh-table tr:hover td {
  background: var(--dh-bg);
}

.dh-pagination {
  display: flex;
  gap: 4px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.dh-pagination button {
  padding: 4px 10px;
  border: 1px solid var(--dh-border);
  background: #fff;
  border-radius: 4px;
  font-size: 12px;
  cursor: pointer;
  color: var(--dh-text-secondary);
}

.dh-pagination button.active {
  background: var(--dh-primary);
  color: #fff;
  border-color: var(--dh-primary);
}

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

.dh-form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--dh-border);
  border-radius: var(--dh-radius-sm);
  font-size: 14px;
  transition: border-color 0.2s;
  background: #fff;
}

.dh-form-control:focus {
  outline: none;
  border-color: var(--dh-primary);
}

.dh-form-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--dh-text-secondary);
  margin-bottom: 6px;
  display: block;
}

.dh-empty {
  text-align: center;
  padding: 48px 0;
  color: var(--dh-text-tertiary);
}

.dh-empty i {
  font-size: 48px;
  margin-bottom: 12px;
  display: block;
}

@media (max-width: 768px) {
  .dh-search-input {
    width: 160px;
  }
  .dh-search-input:focus {
    width: 200px;
  }
}