/* ── Header ── */
.main-header {
  background-color: var(--color-background);
  border-bottom: var(--border-thin);
  padding: var(--space-md) 0;
  position: sticky;
  top: 0;
  z-index: var(--z-header);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-dark);
  text-decoration: none;
}

.main-nav {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.main-nav a {
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  padding: var(--space-sm) var(--space-xs);
}

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

/* ── Footer ── */
.main-footer {
  background-color: var(--color-surface);
  border-top: var(--border-thin);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: var(--space-4xl);
}

.footer-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-2xl);
}

.footer-info h3 {
  margin-top: 0;
}

#footer-nav-list {
  list-style: none;
  padding: 0;
}

#footer-nav-list li {
  margin-bottom: var(--space-sm);
}

#footer-nav-list a {
  display: inline-block;
  padding: var(--space-xs) 0;
}

.footer-legal {
  grid-column: 1 / -1;
  padding-top: var(--space-xl);
  border-top: var(--border-thin);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  display: flex;
  justify-content: space-between;
}

/* ── Hamburger Icon ── */
.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.hamburger {
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
}

.hamburger::before {
  top: -7px;
}

.hamburger::after {
  top: 7px;
}

/* Animate to X when open */
[aria-expanded="true"] .hamburger {
  background: transparent;
}

[aria-expanded="true"] .hamburger::before {
  top: 0;
  transform: rotate(45deg);
}

[aria-expanded="true"] .hamburger::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ── Responsive ── */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
  }

  .main-nav.nav-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-background);
    border-bottom: var(--border-thin);
    padding: var(--space-md) var(--space-lg);
    box-shadow: var(--shadow-md);
    z-index: var(--z-header);
  }

  .main-nav.nav-open a {
    padding: var(--space-md) 0;
    width: 100%;
    border-bottom: var(--border-thin);
  }

  .main-nav.nav-open a:last-child {
    border-bottom: none;
  }

  .mobile-nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
  }

  .main-header .header-container {
    position: relative;
  }
}