/**
 * Atlas Header, Hero, and Article Header
 */

/* Site header */
.atlas-header {
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg);
}

.atlas-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: var(--space-3);
}

.atlas-header__brand {
  margin: 0;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

.atlas-header__brand a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.atlas-header__brand a:hover {
  color: var(--color-primary);
}

/* Hero */
.atlas-hero {
  max-width: var(--container-xl);
  margin-inline: auto;
  padding-inline: var(--space-3);
  text-align: center;
}

.atlas-hero__title {
  max-width: 20ch;
  margin-inline: auto;
  margin-bottom: var(--space-3);
  font-size: var(--font-size-3xl);
  color: var(--color-secondary);
}

.atlas-hero__subtitle {
  max-width: 42rem;
  margin-inline: auto;
  font-size: var(--font-size-md);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-muted);
}

.atlas-hero__search {
  margin-inline: auto;
}

/* Section heading */
.atlas-section-heading {
  margin-bottom: var(--space-2);
}

.atlas-section-heading__title {
  margin-bottom: var(--space-2);
  color: var(--color-secondary);
}

.atlas-section-heading__description {
  max-width: 42rem;
  margin: 0;
  font-size: var(--font-size-md);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
}

/* Breadcrumbs */
.atlas-breadcrumbs {
  font-size: var(--font-size-sm);
}

.atlas-breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
}

.atlas-breadcrumbs__item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-text-muted);
}

.atlas-breadcrumbs__item:not(:last-child)::after {
  content: "/";
  margin-left: var(--space-1);
  color: var(--color-border-strong);
}

.atlas-breadcrumbs__link {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.atlas-breadcrumbs__link:hover {
  color: var(--color-primary);
}

.atlas-breadcrumbs__label {
  color: var(--color-secondary);
  font-weight: var(--font-weight-medium);
}

/* Article header */
.atlas-article-header {
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.atlas-article-header__category {
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

.atlas-article-header__category-link {
  color: var(--color-primary);
  text-decoration: none;
}

.atlas-article-header__category-link:hover {
  color: var(--color-primary-dark);
}

.atlas-article-header__category-label {
  color: var(--color-primary);
}

.atlas-article-header__title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-4);
  color: var(--color-secondary);
}

.atlas-article-header__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3) var(--space-5);
  margin-bottom: var(--space-5);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.atlas-article-header__figure {
  margin-top: var(--space-5);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.atlas-article-header__image {
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* Author meta */
.atlas-author-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
}

.atlas-author-meta p {
  margin: 0;
}

.atlas-author-meta__label {
  color: var(--color-text-muted);
  font-weight: var(--font-weight-medium);
}

.atlas-author-meta__author {
  color: var(--color-secondary);
  font-weight: var(--font-weight-medium);
}

/* Reading time */
.atlas-reading-time {
  margin: 0;
}

.atlas-reading-time__value {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* Site navigation */
.atlas-site-nav__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.atlas-site-nav--header .atlas-site-nav__link {
  display: inline-block;
  padding: var(--space-1) 0;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.atlas-site-nav--header .atlas-site-nav__link:hover,
.atlas-site-nav--header .atlas-site-nav__item.is-current .atlas-site-nav__link {
  color: var(--color-primary);
}

.atlas-site-nav--footer .atlas-site-nav__list {
  flex-direction: column;
  gap: var(--space-2);
}

.atlas-site-nav--footer .atlas-site-nav__link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.atlas-site-nav--footer .atlas-site-nav__link:hover,
.atlas-site-nav--footer .atlas-site-nav__item.is-current .atlas-site-nav__link {
  color: var(--color-primary);
}