.site-header {
  position: relative;
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
}

.site-header__inner {
  display: flex;
  min-height: 4.75rem;
  align-items: center;
  gap: var(--space-3);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 0 1 auto;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-text);
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  text-decoration: none;
}

.site-header__brand:hover {
  color: var(--color-primary-strong);
  text-decoration: none;
}

.site-header__logo {
  width: 2rem;
  height: 2rem;
  flex: 0 0 2rem;
  object-fit: contain;
}

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

.site-header__desktop-nav {
  display: none;
  min-width: 0;
  margin-left: auto;
}

.site-header__primary-nav,
.site-header__mobile-nav {
  min-width: 0;
}

.site-header__nav-list,
.site-header__mobile-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-header__nav-list a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.5rem;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.15;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
}

.site-header__nav-list a:hover,
.site-header__nav-list a[aria-current="page"] {
  background: var(--color-bg-alt);
  color: var(--color-primary-strong);
  text-decoration: underline;
}

.site-header__play {
  min-width: 0;
  margin-left: auto;
  padding-inline: 0.75rem;
  font-size: 0.6875rem;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.site-header__toggle {
  display: inline-flex;
  width: 2.75rem;
  min-width: 2.75rem;
  height: 2.75rem;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.25rem;
  border: 1px solid var(--color-text);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text);
  padding: 0;
}

.site-header__toggle:hover,
.site-header__toggle[aria-expanded="true"] {
  border-color: var(--color-primary-strong);
  background: var(--color-bg-alt);
  color: var(--color-primary-strong);
}

.site-header__toggle-line {
  display: block;
  width: 1.25rem;
  height: 0.125rem;
  border-radius: 1rem;
  background: currentColor;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
  transform: translateY(0.375rem) rotate(45deg);
}

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

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(3) {
  transform: translateY(-0.375rem) rotate(-45deg);
}

.site-header__mobile-nav {
  position: absolute;
  z-index: 101;
  top: 100%;
  right: 0;
  left: 0;
  max-height: calc(100vh - 4.75rem);
  overflow-y: auto;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  box-shadow: var(--shadow-float);
}

.site-header__mobile-nav[hidden] {
  display: none;
}

.site-header__mobile-nav-inner {
  display: grid;
  gap: var(--space-4);
  padding-top: var(--space-5);
  padding-bottom: var(--space-5);
}

.site-header__menu-title {
  margin: 0;
  color: var(--color-text-muted);
  font-family: var(--font-heading);
  font-size: var(--text-meta);
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: var(--leading-meta);
  text-transform: uppercase;
}

.site-header__mobile-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
}

.site-header__mobile-list a {
  display: flex;
  min-height: 2.75rem;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.625rem;
  color: var(--color-text);
  font-family: var(--font-heading);
  font-size: var(--text-label);
  font-weight: 600;
  line-height: 1.25;
  text-decoration: none;
}

.site-header__mobile-list a:hover,
.site-header__mobile-list a[aria-current="page"] {
  border-color: var(--color-primary);
  background: rgb(107 79 179 / 8%);
  color: var(--color-primary-strong);
  text-decoration: underline;
}

.site-header__mobile-play {
  width: 100%;
}

@media (max-width: 479px) {
  .site-header__inner {
    min-height: 4.25rem;
  }

  .site-header__brand {
    gap: 0.5rem;
    font-size: 1rem;
  }

  .site-header__play {
    min-height: 2.5rem;
    padding-inline: 0.5rem;
    font-size: 0.5625rem;
  }

  .site-header__mobile-nav {
    max-height: calc(100vh - 4.25rem);
  }
}

@media (min-width: 640px) {
  .site-header__inner {
    min-height: 5rem;
  }

  .site-header__logo {
    width: 2.5rem;
    height: 2.5rem;
    flex-basis: 2.5rem;
  }

  .site-header__brand {
    font-size: 1.25rem;
  }

  .site-header__play {
    padding-inline: 0.875rem;
    font-size: 0.75rem;
  }
}

@media (min-width: 1180px) {
  .site-header__inner {
    min-height: 5rem;
    gap: 0.75rem;
  }

  .site-header__desktop-nav {
    display: block;
  }

  .site-header__play {
    margin-left: 0;
  }

  .site-header__toggle,
  .site-header__mobile-nav {
    display: none;
  }
}

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