.site-header {
  position: fixed;
  z-index: 80;
  inset-block: 0;
  inset-inline-start: 0;
  display: flex;
  inline-size: var(--sidebar-width);
  min-block-size: 100dvh;
  flex-direction: column;
  border-inline-end: var(--border);
  background: var(--color-pale-stone);
}

.site-header__bar {
  display: flex;
  min-block-size: 6.5rem;
  align-items: flex-start;
  justify-content: space-between;
  padding: 1.75rem;
}

.site-header__brand {
  display: inline-flex;
  min-inline-size: 0;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-charcoal);
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
}

.site-header__logo {
  inline-size: 2.625rem;
  block-size: 2.625rem;
  flex: 0 0 auto;
  object-fit: contain;
}

.site-header__brand-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-header__toggle,
.site-header__close {
  display: none;
}

.site-header__nav {
  display: flex;
  min-block-size: 0;
  flex: 1 1 auto;
  flex-direction: column;
  padding: 0 1.25rem 1.75rem;
}

.site-header__nav-head {
  display: none;
}

.site-header__list {
  display: grid;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__list li,
.site-header__list li + li {
  margin: 0;
  padding: 0;
}

.site-header__list a {
  display: block;
  border-inline-start: 3px solid transparent;
  color: var(--color-charcoal);
  padding: 0.65rem 0.75rem;
  font-size: var(--font-size-14);
  font-weight: 600;
  line-height: 1.35;
  text-decoration: none;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.site-header__list a:hover,
.site-header__list a[aria-current="page"] {
  border-inline-start-color: var(--color-lavender-deep);
  background: var(--color-lavender-mist);
  color: var(--color-charcoal);
}

.site-header__nav .google-play-badge {
  display: inline-flex;
  margin-block-start: auto;
}

body {
  padding-inline-start: var(--sidebar-width);
}

@media (max-width: 899px) {
  html.site-navigation-open,
  html.site-navigation-open body {
    overflow: hidden;
  }

  body {
    padding-inline-start: 0;
    padding-block-start: 4.5rem;
  }

  .site-header {
    inset-block-start: 0;
    inset-block-end: auto;
    inset-inline: 0;
    display: block;
    inline-size: auto;
    min-block-size: 0;
    border-inline-end: 0;
    border-block-end: var(--border);
    background: var(--color-warm-white);
  }

  .site-header__bar {
    min-block-size: 4.5rem;
    align-items: center;
    padding: 0 var(--container-padding-tablet);
  }

  .site-header__brand {
    font-size: 1.125rem;
  }

  .site-header__logo {
    inline-size: 1.875rem;
    block-size: 1.875rem;
  }

  .site-header__toggle {
    display: inline-grid;
    inline-size: 2.75rem;
    block-size: 2.75rem;
    flex: 0 0 auto;
    align-content: center;
    justify-content: center;
    gap: 0.28rem;
    border: 1px solid var(--color-charcoal);
    border-radius: var(--radius-sm);
    background: transparent;
    padding: 0;
  }

  .site-header__toggle-line {
    display: block;
    inline-size: 1.15rem;
    block-size: 1px;
    background: var(--color-charcoal);
    transition: transform var(--transition-fast), opacity var(--transition-fast);
  }

  .site-header--open .site-header__toggle-line:nth-child(1) { transform: translateY(0.38rem) rotate(45deg); }
  .site-header--open .site-header__toggle-line:nth-child(2) { opacity: 0; }
  .site-header--open .site-header__toggle-line:nth-child(3) { transform: translateY(-0.38rem) rotate(-45deg); }

  .site-header__nav {
    position: fixed;
    z-index: 81;
    inset-block: 0;
    inset-inline-start: 0;
    display: flex;
    inline-size: min(22rem, calc(100vw - 2.5rem));
    min-block-size: 100dvh;
    overflow-y: auto;
    border-inline-end: var(--border);
    background: var(--color-pale-stone);
    padding: var(--space-6);
    transform: translateX(-105%);
    transition: transform var(--transition-fast);
  }

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

  .site-header__nav-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-block-end: var(--space-6);
  }

  .site-header__nav-title {
    font-family: var(--font-heading);
    font-size: var(--font-size-22);
    font-weight: 700;
  }

  .site-header__close {
    display: grid;
    inline-size: 2.5rem;
    block-size: 2.5rem;
    place-items: center;
    border: 1px solid var(--color-charcoal);
    border-radius: var(--radius-sm);
    background: transparent;
    padding: 0;
  }

  .site-header__close span {
    position: absolute;
    inline-size: 1rem;
    block-size: 1px;
    background: var(--color-charcoal);
  }

  .site-header__close span:first-child { transform: rotate(45deg); }
  .site-header__close span:last-child { transform: rotate(-45deg); }

  .site-header__list { gap: var(--space-2); }
  .site-header__list a { padding: 0.75rem; font-size: var(--font-size-16); }
  .site-header__nav .google-play-badge { margin-block-start: var(--space-8); align-self: flex-start; }
}

@media (max-width: 599px) {
  body { padding-block-start: 4rem; }
  .site-header__bar { min-block-size: 4rem; padding-inline: var(--container-padding-mobile); }
  .site-header__logo { inline-size: 1.875rem; block-size: 1.875rem; }
  .site-header__brand { font-size: 1.125rem; }
  .site-header__toggle { inline-size: 2.5rem; block-size: 2.5rem; }
  .site-header__nav { inline-size: min(21rem, calc(100vw - 1.5rem)); padding: var(--space-4); }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__nav,
  .site-header__toggle-line { transition: none; }
}