.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  max-width: 56rem;
  margin: 0 auto;
  padding: 1.5rem clamp(1rem, 4vw, 2rem);
}

.site-header a,
.back-link {
  color: var(--text-color);
  text-decoration: none;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
}

.site-header__logo {
  display: block;
  width: 7rem;
  height: 2rem;
  object-fit: cover;
  object-position: center;
}

:root[data-theme="dark"] .site-header__logo {
  filter: invert(1);
  mix-blend-mode: screen;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .site-header__logo {
    filter: invert(1);
    mix-blend-mode: screen;
  }
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 1rem;
}

.site-header nav a {
  color: var(--muted-color);
}

.site-header nav a:hover,
.back-link:hover {
  color: var(--text-color);
  text-decoration: underline;
}

.content-page {
  width: min(100% - 2rem, 48rem);
  margin: 0 auto;
  padding: clamp(2rem, 8vw, 5rem) 0;
}

.content-page > h1,
.article-header h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3rem);
  line-height: 1.2;
}

.content-page__intro,
.article-header > p {
  color: var(--muted-color);
  line-height: 1.7;
}

.post-list {
  display: grid;
  gap: 1rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.post-card {
  display: block;
  padding: 1.25rem;
  color: var(--text-color);
  border: 1px solid var(--border-color);
  background: var(--surface-color);
  text-decoration: none;
  transition: border-color 180ms ease, transform 180ms ease;
}

.post-card:hover,
.post-card:focus-visible {
  border-color: var(--hover-border-color);
  transform: translateY(-2px);
}

.post-card time,
.article-header time {
  color: var(--muted-color);
  font-size: 0.85rem;
}

.post-card h2 {
  margin: 0.5rem 0;
  font-size: 1.25rem;
}

.post-card p {
  margin: 0;
  color: var(--muted-color);
  line-height: 1.6;
}

.article-header {
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.article-header h1 {
  margin-top: 0.75rem;
}

.article-content {
  padding: 1.5rem 0 2rem;
  line-height: 1.8;
}

.article-content h2,
.article-content h3 {
  margin-top: 2rem;
}

.back-link {
  color: var(--muted-color);
}

@media (prefers-reduced-motion: reduce) {
  .post-card {
    transition: none;
  }
}