/* ==========================================================================
   Site header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding-block: var(--space-3);
}

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

.site-title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
  color: var(--color-text);
  text-decoration: none;
}

.custom-logo-link img { border-radius: var(--radius-sm); }

/* Mobile nav toggle — CSS-only, no JS */
.nav-toggle-checkbox { position: absolute; opacity: 0; pointer-events: none; }

.nav-toggle-label {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  order: 3;
}
.nav-toggle-label:hover { background: var(--color-surface-alt); }
.nav-toggle-label span {
  display: block;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
}

.nav-toggle-checkbox:focus-visible + .nav-toggle-label {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.site-header__menu {
  display: none;
  flex-basis: 100%;
  order: 4;
}

.nav-toggle-checkbox:checked ~ .site-header__menu {
  display: block;
}

.site-nav .nav-menu {
  list-style: none;
  margin: 0 0 var(--space-3);
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.site-nav .nav-menu a {
  display: block;
  padding: var(--space-2) var(--space-1);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
}
.site-nav .nav-menu a:hover { color: var(--color-accent); }

@media (min-width: 900px) {
  .nav-toggle-label { display: none; }

  .site-header__menu {
    display: flex !important;
    flex-basis: auto;
    align-items: center;
    gap: var(--space-6);
    order: 2;
  }

  .site-nav .nav-menu {
    flex-direction: row;
    margin: 0;
    gap: var(--space-5);
  }

  .site-nav .nav-menu a { padding: var(--space-2) 0; }
}

/* ==========================================================================
   Hero (front page)
   ========================================================================== */
.hero {
  padding-block: var(--space-8) var(--space-7);
  border-bottom: 1px solid var(--color-border);
}

.hero__inner {
  max-width: var(--container-narrow);
  margin-inline: auto;
  padding-inline: var(--space-4);
  text-align: left;
}

.hero__eyebrow {
  display: inline-block;
  background: var(--color-accent-strong);
  color: var(--color-accent-ink);
  font-size: var(--text-xs);
  font-weight: 700;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-4);
}

.hero__title {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 46ch;
  margin: 0;
}

@media (min-width: 640px) {
  .hero__inner { padding-inline: var(--space-6); }
}

/* ==========================================================================
   Post grid sections
   ========================================================================== */
.post-grid-section { padding-block: var(--space-7); }

.section-heading { margin-bottom: var(--space-5); }

.archive-header { margin-bottom: var(--space-6); }
.archive-description { color: var(--color-text-muted); max-width: 60ch; }

.post-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-5);
}

@media (min-width: 640px) {
  .post-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 960px) {
  .post-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ==========================================================================
   Single article / page layout
   ========================================================================== */
.single-article { padding-block: var(--space-7) var(--space-8); }

.single-article__header { margin-bottom: var(--space-5); }

.single-article__title { margin-top: var(--space-3); }

.single-article__meta {
  display: flex;
  gap: var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  flex-wrap: wrap;
}

.single-article__media {
  margin: var(--space-6) 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.single-article__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.post-nav {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.post-nav a { text-decoration: none; font-weight: 600; }

@media (min-width: 640px) {
  .post-nav { grid-template-columns: 1fr 1fr; }
  .post-nav__next { text-align: right; }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
  margin-top: var(--space-8);
}

.site-footer__inner {
  padding-block: var(--space-7);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.site-footer__brand .site-title { color: var(--color-footer-heading); }

.site-footer__tagline {
  color: var(--color-footer-text-muted);
  margin-top: var(--space-2);
  margin-bottom: 0;
}

.footer-menu {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-menu a { color: var(--color-footer-text); text-decoration: none; }
.footer-menu a:hover { color: var(--color-accent-strong); }

.site-footer__copy {
  color: var(--color-footer-text-muted);
  font-size: var(--text-xs);
  margin: 0;
}

@media (min-width: 900px) {
  .site-footer__inner {
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
  }
}