.site-header {
  position: relative;
  z-index: 100;
  border-bottom: var(--border-default);
  background: var(--color-surface-white);
  color: var(--color-ink-night);
}

.site-header__inner {
  display: grid;
  min-height: 4.5rem;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-4);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-ink-night);
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: var(--weight-bold);
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__brand:hover {
  color: var(--color-moon-blue);
}

.site-header__logo {
  width: 2.5rem;
  height: 2.5rem;
  flex: 0 0 2.5rem;
  object-fit: contain;
}

.site-header__nav {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-4);
}

.site-header__nav-list {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: flex-end;
  gap: 0.875rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__nav-list li,
.site-header__nav-list li + li {
  display: flex;
  margin: 0;
  padding: 0;
}

.site-header__nav-list a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  padding: 0.375rem 0;
  color: var(--color-ink-night);
  font-size: var(--text-14);
  font-weight: var(--weight-semibold);
  line-height: 1.25;
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 0.2em;
  white-space: nowrap;
}

.site-header__nav-list a:hover,
.site-header__nav-list a[aria-current="page"] {
  color: var(--color-moon-blue);
  text-decoration-color: currentColor;
}

.site-header__play,
.site-header__nav-play .button {
  white-space: nowrap;
}

.site-header__play--mobile,
.site-header__toggle,
.site-header__nav-mobile {
  display: none;
}

.site-header__official,
.site-footer__official {
  display: none;
}

@media (max-width: 72rem) {
  .site-header__inner {
    min-height: 4.25rem;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: var(--space-3);
  }

  .site-header__brand {
    font-size: 1.0625rem;
  }

  .site-header__logo {
    width: 2.25rem;
    height: 2.25rem;
    flex-basis: 2.25rem;
  }

  .site-header__play--mobile {
    display: inline-flex;
    justify-self: end;
    min-width: 0;
    padding-inline: 0.625rem;
    font-size: 0.6875rem;
    letter-spacing: 0.01em;
  }

  .site-header__toggle {
    display: inline-flex;
    min-width: 2.75rem;
    min-height: 2.75rem;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.5rem;
    border: 1px solid var(--color-border-soft);
    border-radius: var(--radius-technical);
    background: var(--color-surface-white);
    color: var(--color-ink-night);
    font-size: var(--text-12);
    font-weight: var(--weight-bold);
    line-height: 1;
  }

  .site-header__toggle:hover,
  .site-header__toggle[aria-expanded="true"] {
    border-color: var(--color-moon-blue);
    background: var(--color-moon-blue-soft);
    color: var(--color-moon-blue);
    transform: none;
  }

  .site-header__toggle-lines {
    display: grid;
    width: 1.125rem;
    gap: 0.1875rem;
  }

  .site-header__toggle-lines span {
    display: block;
    width: 100%;
    height: 2px;
    border-radius: 99px;
    background: currentColor;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
  }

  .site-header__toggle[aria-expanded="true"] .site-header__toggle-lines span:nth-child(1) {
    transform: translateY(5px) rotate(45deg);
  }

  .site-header__toggle[aria-expanded="true"] .site-header__toggle-lines span:nth-child(2) {
    opacity: 0;
  }

  .site-header__toggle[aria-expanded="true"] .site-header__toggle-lines span:nth-child(3) {
    transform: translateY(-5px) rotate(-45deg);
  }

  .site-header__nav {
    position: absolute;
    z-index: 101;
    top: calc(100% + 1px);
    right: max(var(--container-padding), calc((100vw - var(--container-max)) / 2));
    left: max(var(--container-padding), calc((100vw - var(--container-max)) / 2));
    display: none;
    max-height: calc(100vh - 4.25rem);
    padding: var(--space-4);
    overflow-y: auto;
    border: var(--border-default);
    border-radius: 0 0 var(--radius-panel) var(--radius-panel);
    background: var(--color-surface-white);
    box-shadow: var(--shadow-elevated);
  }

  .site-header__nav.is-open {
    display: grid;
    gap: var(--space-4);
  }

  .site-header__nav-list {
    display: grid;
    justify-content: stretch;
    gap: 0;
  }

  .site-header__nav-list li,
  .site-header__nav-list li + li {
    display: block;
    border-bottom: var(--border-default);
  }

  .site-header__nav-list li:last-child {
    border-bottom: 0;
  }

  .site-header__nav-list a {
    display: flex;
    width: 100%;
    min-height: 2.75rem;
    padding-block: 0.625rem;
  }

  .site-header__nav-mobile {
    display: block;
  }

  .site-header__nav-play .button {
    width: 100%;
  }
}

@media (max-width: 31rem) {
  .site-header__inner {
    gap: var(--space-2);
  }

  .site-header__brand-name {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
  }

  .site-header__play--mobile {
    font-size: 0;
  }

  .site-header__play--mobile::before {
    content: "Google Play";
    font-size: var(--text-12);
  }

  .site-header__toggle-text {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__toggle-lines span {
    transition: none;
  }
}