.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-card);
}

.site-header__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: var(--header-height);
}

.site-brand {
  display: flex;
  flex-direction: column;
  gap: 0;
  min-width: 0;
}

.site-brand__title {
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  margin: 0;
}

.site-brand__title a {
  color: var(--color-text);
  text-decoration: none;
}

.site-brand__title a:hover {
  color: var(--color-accent);
}

.site-brand__tagline {
  display: none;
  font-size: 0.7rem;
  color: var(--color-text-dim);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex-shrink: 0;
}

.site-nav a {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-accent);
  background: var(--color-accent-muted);
}

.site-body {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-md);
}

.site-layout {
  display: grid;
  gap: var(--space-lg);
}

.site-main {
  min-width: 0;
}

.site-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.page-header {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border-subtle);
}

.page-header__title {
  font-size: 1.375rem;
  margin-bottom: var(--space-xs);
}

.page-header__desc {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin: 0;
}

.page-header__meta {
  margin-top: var(--space-sm);
  font-size: 0.8125rem;
}

.section-block {
  margin-bottom: var(--space-xl);
}

.section-block__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-border-subtle);
}

.section-block__title {
  font-size: 1.1rem;
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.section-block__title::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 1em;
  background: var(--color-accent);
  border-radius: 2px;
}

.section-block__more {
  font-size: 0.8125rem;
  font-weight: 600;
  white-space: nowrap;
}

.site-footer {
  margin-top: var(--space-2xl);
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border-subtle);
}

.site-footer__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
}

.site-footer__grid {
  display: grid;
  gap: var(--space-lg);
}

.site-footer__heading {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.site-footer__text {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-sm);
  line-height: 1.7;
}

.site-footer__text:last-child {
  margin-bottom: 0;
}

.site-footer__bottom {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-subtle);
  font-size: 0.75rem;
  color: var(--color-text-dim);
  text-align: center;
}

@media (min-width: 768px) {
  .site-brand__tagline {
    display: block;
  }

  .site-body {
    padding: var(--space-lg) var(--space-md);
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .site-layout {
    grid-template-columns: 1fr var(--sidebar-width);
    align-items: start;
  }

  .site-layout--single {
    grid-template-columns: 1fr 240px;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .card-grid--home {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-footer__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1200px) {
  .card-grid--dense {
    grid-template-columns: repeat(2, 1fr);
  }
}