.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--color-river-blue);
  color: var(--color-warm-ivory);
  box-shadow: var(--shadow-soft);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-gutter-mobile);
  padding-block: var(--space-3);
  min-height: 64px;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
  min-width: 0;
}

.site-header__brand:hover {
  color: var(--color-warm-ivory);
}

.site-header__logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border-radius: var(--radius-small);
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-header__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid rgba(var(--color-warm-ivory-rgb), 0.3);
  border-radius: var(--radius-small);
  color: var(--color-warm-ivory);
  cursor: pointer;
  transition: background-color var(--transition-duration) var(--transition-ease),
              border-color var(--transition-duration) var(--transition-ease),
              color var(--transition-duration) var(--transition-ease);
}

.site-header__toggle:hover {
  background-color: rgba(var(--color-warm-ivory-rgb), 0.1);
  border-color: rgba(var(--color-warm-ivory-rgb), 0.5);
}

.site-header__toggle:focus-visible {
  outline: var(--border-focus);
  outline-offset: 2px;
}

.site-header__toggle[aria-expanded="true"] {
  background-color: rgba(var(--color-warm-ivory-rgb), 0.15);
  border-color: var(--color-coral);
  color: var(--color-coral);
}

.site-header__toggle-icon {
  position: relative;
  width: 20px;
  height: 2px;
  background-color: currentColor;
  border-radius: 1px;
  transition: background-color var(--transition-duration) var(--transition-ease);
}

.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: currentColor;
  border-radius: 1px;
  transition: transform var(--transition-duration) var(--transition-ease),
              top var(--transition-duration) var(--transition-ease);
}

.site-header__toggle-icon::before {
  top: -6px;
}

.site-header__toggle-icon::after {
  top: 6px;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon {
  background-color: transparent;
}

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

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

.site-header__nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-river-blue);
  box-shadow: var(--shadow-lifted);
  max-height: calc(100vh - 64px);
  overflow-y: auto;
  z-index: 999;
}

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

.site-header__nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.site-header__nav-item {
  margin: 0;
  padding: 0;
}

.site-header__nav-link {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: var(--color-warm-ivory);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.4;
  border-block-end: 1px solid rgba(var(--color-warm-ivory-rgb), 0.1);
  transition: background-color var(--transition-duration) var(--transition-ease),
              color var(--transition-duration) var(--transition-ease);
}

.site-header__nav-link:hover {
  background-color: rgba(var(--color-warm-ivory-rgb), 0.08);
  color: var(--color-coral);
}

.site-header__nav-link:focus-visible {
  outline: var(--border-focus);
  outline-offset: -2px;
}

@media (min-width: 1024px) {
  .site-header__inner {
    padding-inline: var(--container-gutter-desktop);
    min-height: 72px;
  }

  .site-header__logo {
    width: 48px;
    height: 48px;
  }

  .site-header__brand-text {
    font-size: 1.5rem;
  }

  .site-header__toggle {
    display: none;
  }

  .site-header__nav {
    display: block;
    position: static;
    background: transparent;
    box-shadow: none;
    max-height: none;
    overflow: visible;
    z-index: auto;
  }

  .site-header__nav-list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-4);
  }

  .site-header__nav-item {
    margin: 0;
  }

  .site-header__nav-link {
    padding: var(--space-2) var(--space-1);
    border-block-end: none;
    font-size: 1rem;
    line-height: 1.2;
    position: relative;
  }

  .site-header__nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    background-color: var(--color-coral);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-duration) var(--transition-ease);
  }

  .site-header__nav-link:hover::after,
  .site-header__nav-link:focus-visible::after {
    transform: scaleX(1);
  }

  .site-header__nav-link:hover {
    background-color: transparent;
    color: var(--color-warm-ivory);
  }
}

@media (max-width: 1023px) {
  .site-header__brand-text {
    font-size: 1.125rem;
  }
}

@media (max-width: 767px) {
  .site-header__brand-text {
    display: none;
  }

  .site-header__logo {
    width: 32px;
    height: 32px;
  }

  .site-header__inner {
    min-height: 56px;
    padding-block: var(--space-2);
  }

  .site-header__nav {
    max-height: calc(100vh - 56px);
  }
}