/* Person 1 owns shared header, navigation, footer, and page layout. */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.container {
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 0 1rem;
}

.header-inner {
  align-items: center;
  display: flex;
  justify-content: space-between;
  min-height: 72px;
}

.site-logo {
  color: var(--color-primary);
  font-weight: 700;
  text-decoration: none;
}

.nav-toggle {
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  display: none;
  padding: 0.5rem 0.75rem;
}

.site-nav ul {
  align-items: center;
  display: flex;
  gap: 1rem;
  list-style: none;
  padding: 0;
}

.site-nav a {
  color: var(--color-text);
  font-weight: 600;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus {
  color: var(--color-primary);
}

.page-main {
  min-height: 70vh;
}

.page-header {
  background-image: linear-gradient(90deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.82)),
    url("https://images.unsplash.com/photo-1600566753190-17f0baa2a6c3?auto=format&fit=crop&w=1600&q=80");
  background-position: center;
  background-size: cover;
  border-bottom: 1px solid var(--color-border);
  padding: 3rem 0;
  position: relative;
}

.page-header::after {
  background: rgba(11, 31, 51, 0.72);
  border-radius: 999px;
  bottom: 1rem;
  color: #ffffff;
  content: "Placeholder background image";
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3rem 0.65rem;
  position: absolute;
  right: 1rem;
}

.site-footer {
  background: var(--color-primary-dark);
  color: #f5f7fa;
  margin-top: var(--space-section);
  padding: 2rem 0;
}

.footer-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1.2fr repeat(3, minmax(0, 1fr));
  padding-bottom: 2rem;
}

.footer-grid h3 {
  color: #ffffff;
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.footer-grid p,
.footer-grid a {
  color: #d7dee8;
  margin-bottom: 0.35rem;
  text-decoration: none;
}

.footer-grid a:hover,
.footer-grid a:focus {
  color: #ffffff;
}

.footer-links {
  display: grid;
  gap: 0.35rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  color: #d7dee8;
  font-size: 0.9rem;
  padding: 1rem 0 0;
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    display: none;
    left: 0;
    position: absolute;
    right: 0;
    top: 72px;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav ul {
    align-items: stretch;
    flex-direction: column;
    gap: 0;
    padding: 1rem;
  }

  .site-nav a {
    display: block;
    padding: 0.5rem 0;
  }
}