:root {
  --md-sys-color-primary: #4f46e5;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #eef2ff;
  --md-sys-color-on-primary-container: #312e81;
  --md-sys-color-secondary: #6b7280;
  --md-sys-color-on-secondary: #ffffff;
  --md-sys-color-surface: #ffffff;
  --md-sys-color-on-surface: #111827;
  --md-sys-color-surface-variant: #f1f5f9;
  --md-sys-color-on-surface-variant: #6b7280;
  --md-sys-color-outline: #e5e7eb;
  --md-sys-color-outline-variant: #e2e8f0;
  --md-sys-color-surface-container-low: #f8fafc;
  --md-sys-color-surface-container: #f1f5f9;
  --md-sys-color-surface-container-high: #e2e8f0;
  --md-sys-color-shadow: rgba(15, 23, 42, 0.08);
  --md-ref-typeface-plain: system-ui, -apple-system, "Segoe UI", sans-serif;
  --vsmd3-radius: 16px;
  --vsmd3-spacing: 16px;
}

.vsmd3-sitemap {
  font-family: var(--md-ref-typeface-plain);
  color: var(--md-sys-color-on-surface);
  background: var(--md-sys-color-surface);
  border-radius: var(--vsmd3-radius);
  padding: clamp(16px, 2vw, 28px);
  border: 1px solid var(--md-sys-color-outline);
  box-shadow: 0 1px 2px var(--md-sys-color-shadow);
}

.vsmd3-header {
  display: grid;
  gap: 16px;
  padding: 16px;
  border-radius: 20px;
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  border: 1px solid var(--md-sys-color-outline);
}

.vsmd3-header__title {
  display: grid;
  gap: 8px;
}

.vsmd3-title {
  font-size: clamp(20px, 2.2vw, 28px);
  margin: 0;
}

.vsmd3-subtitle {
  margin: 0;
  color: var(--md-sys-color-on-surface-variant);
}

.vsmd3-header__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.vsmd3-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--md-sys-color-surface-variant);
  color: var(--md-sys-color-on-surface);
  font-size: 12px;
  border: 1px solid var(--md-sys-color-outline);
}

.vsmd3-search {
  display: grid;
  gap: 6px;
}

.vsmd3-search-results {
  margin-top: 12px;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface);
  display: grid;
  gap: 10px;
}

.vsmd3-search-results__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--md-sys-color-on-surface-variant);
}

.vsmd3-search-results__title {
  font-weight: 600;
}

.vsmd3-search-results__count {
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline);
  color: var(--md-sys-color-on-surface);
}

.vsmd3-results-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  max-height: 280px;
  overflow: auto;
}

.vsmd3-results-item {
  display: grid;
  gap: 4px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--md-sys-color-outline);
  background: var(--md-sys-color-surface-container-low);
}

.vsmd3-results-link {
  color: inherit;
  text-decoration: none;
  font-weight: 600;
}

.vsmd3-results-link:hover,
.vsmd3-results-link:focus {
  color: var(--md-sys-color-primary);
  text-decoration: underline;
}

.vsmd3-results-meta {
  font-size: 11px;
  color: var(--md-sys-color-on-surface-variant);
}

.vsmd3-search__label {
  font-size: 12px;
  font-weight: 600;
}

.vsmd3-search__input {
  width: 100%;
  border: 1px solid var(--md-sys-color-outline);
  border-radius: 12px;
  padding: 10px 12px;
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
}

.vsmd3-search__input:focus {
  outline: 2px solid var(--md-sys-color-primary);
  border-color: transparent;
}

.vsmd3-grid {
  display: grid;
  gap: 20px;
  margin-top: 20px;
  grid-template-columns: 1fr;
}

.vsmd3-card {
  background: var(--md-sys-color-surface);
  border-radius: 18px;
  border: 1px solid var(--md-sys-color-outline-variant);
  box-shadow: 0 10px 24px -18px rgba(15, 23, 42, 0.28);
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.vsmd3-card:hover {
  box-shadow: 0 18px 36px -24px rgba(15, 23, 42, 0.3);
  transform: translateY(-1px);
}

.vsmd3-card__summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  background: var(--md-sys-color-surface-container-low);
  position: relative;
}

.vsmd3-card__summary::before {
  content: '';
  width: 4px;
  border-radius: 999px;
  background: var(--md-sys-color-primary);
  align-self: stretch;
}

.vsmd3-card__summary::-webkit-details-marker,
.vsmd3-card__summary::marker {
  display: none;
}

.vsmd3-card__summary:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}

.vsmd3-card[open] .vsmd3-card__summary {
  background: var(--md-sys-color-surface-container);
}

.vsmd3-card__header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  flex: 1;
}

.vsmd3-card__text {
  display: grid;
  gap: 4px;
}

.vsmd3-card__title {
  font-size: 16px;
  margin: 0;
}

.vsmd3-card__desc {
  margin: 4px 0 0;
  color: var(--md-sys-color-on-surface-variant);
  font-size: 12px;
}

.vsmd3-card__chevron {
  width: 18px;
  height: 18px;
  border-right: 2px solid var(--md-sys-color-on-surface-variant);
  border-bottom: 2px solid var(--md-sys-color-on-surface-variant);
  transform: rotate(45deg);
  margin-top: 6px;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.vsmd3-card[open] .vsmd3-card__chevron {
  transform: rotate(-135deg);
}

.vsmd3-card__body {
  padding: 12px 20px 18px;
  border-top: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface);
  display: grid;
  gap: 12px;
  max-height: min(420px, 60vh);
  overflow: auto;
  overscroll-behavior: contain;
}

.vsmd3-badge {
  min-width: 32px;
  height: 32px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font-size: 12px;
  font-weight: 600;
}

.vsmd3-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.vsmd3-item {
  display: grid;
  gap: 4px;
  padding: 10px 14px;
  border-radius: 12px;
  background: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.vsmd3-item:hover {
  border-color: var(--md-sys-color-primary-container);
  box-shadow: 0 6px 14px -12px rgba(15, 23, 42, 0.25);
}

.vsmd3-item__link {
  color: inherit;
  text-decoration: none;
  font-weight: 600;
}

.vsmd3-item__link:hover,
.vsmd3-item__link:focus {
  color: var(--md-sys-color-primary);
  text-decoration: underline;
}

.vsmd3-item__meta {
  font-size: 11px;
  color: var(--md-sys-color-on-surface-variant);
}

.vsmd3-empty {
  margin: 0;
  font-size: 13px;
  color: var(--md-sys-color-on-surface-variant);
}

@media (max-width: 640px) {
  .vsmd3-header {
    padding: 14px;
  }

  .vsmd3-card {
    border-radius: 14px;
  }

  .vsmd3-card__summary {
    padding: 14px 16px;
  }

  .vsmd3-card__body {
    padding: 10px 16px 14px;
    max-height: min(320px, 55vh);
  }
}