/* ==========================================================================
   Layout — Site Header, Footer, Containers
   ========================================================================== */

/* Page Container */
.page-container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

/* Page Content */
.page-content {
  padding-top: var(--nav-height);
}

/* ---------- Site Header ---------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: var(--color-bg-dark);
  border-bottom: 1px solid var(--color-border);
}

.site-header .page-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.site-header__logo {
  flex-shrink: 0;
}

.site-header__logo img {
  height: 6rem;
  width: auto;
}

.site-header__nav-list {
  display: flex;
  gap: var(--space-xl);
  align-items: center;
}

.site-header__nav-link {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
  padding: var(--space-sm) 0;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.site-header__nav-link:hover,
.site-header__nav-link--active {
  color: var(--color-accent-blue);
}

/* Hamburger */
.site-header__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  z-index: 110;
}

.site-header__hamburger-bar {
  display: block;
  width: 1.75rem;
  height: 2px;
  background-color: var(--color-text-light);
  transition: transform var(--transition-medium), opacity var(--transition-medium);
}

/* Hamburger active state */
.site-header__hamburger--active .site-header__hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header__hamburger--active .site-header__hamburger-bar:nth-child(2) {
  opacity: 0;
}

.site-header__hamburger--active .site-header__hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Site Footer ---------- */

.site-footer {
  background-color: var(--color-bg-dark-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--space-3xl) 0 var(--space-xl);
  text-align: center;
}

.site-footer__logo {
  height: 5rem;
  width: auto;
  margin-inline: auto;
  margin-bottom: var(--space-2xl);
}

.site-footer__heading {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-lg);
}

.site-footer__contact {
  margin-bottom: var(--space-2xl);
}

.site-footer__contact-item {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.site-footer__contact-item a {
  color: var(--color-accent-blue);
  transition: color var(--transition-fast);
}

.site-footer__contact-item a:hover {
  color: var(--color-accent-blue-hover);
}

.site-footer__cta {
  display: inline-block;
  padding: var(--space-sm) var(--space-xl);
  background-color: var(--color-accent-blue);
  color: var(--color-text-light);
  font-weight: var(--font-weight-medium);
  border-radius: var(--border-radius-sm);
  transition: background-color var(--transition-fast);
  margin-bottom: var(--space-2xl);
}

.site-footer__cta:hover {
  background-color: var(--color-accent-blue-hover);
  color: var(--color-text-light);
}

.site-footer__copyright {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-lg);
}

/* ---------- Responsive ---------- */

@media (max-width: 48em) {
  .site-header__hamburger {
    display: flex;
  }

  .site-header__nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(75vw, 20rem);
    height: 100vh;
    background-color: var(--color-bg-dark);
    border-left: 1px solid var(--color-border);
    padding: calc(var(--nav-height) + var(--space-lg)) var(--space-xl) var(--space-xl);
    transform: translateX(100%);
    transition: transform var(--transition-medium);
    z-index: 105;
  }

  .site-header__nav--open {
    transform: translateX(0);
  }

  .site-header__nav-list {
    flex-direction: column;
    gap: var(--space-lg);
    align-items: flex-start;
  }

  .site-header__nav-link {
    font-size: var(--font-size-lg);
  }
}