.site-header {
  position: relative;
  z-index: 100;
  width: 100%;
  border-bottom: var(--border);
  background: var(--color-crisp-white);
}

.site-header__inner {
  display: flex;
  align-items: center;
  min-height: 5.5rem;
  gap: var(--space-4);
}

.site-header__brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-raw-black);
  text-decoration: none;
}

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

.site-header__logo {
  width: 3.25rem;
  height: 3.25rem;
  flex: 0 0 3.25rem;
  object-fit: contain;
}

.site-header__brand-name {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.07em;
  line-height: 1;
  white-space: nowrap;
  text-transform: uppercase;
}

.site-header__nav {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: flex-end;
  min-width: 0;
  gap: var(--space-4);
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(0.55rem, 1.1vw, 1.1rem);
  min-width: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.site-header__nav-list a,
.site-header__contact {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  color: var(--color-raw-black);
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.15;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header__nav-list a {
  border-bottom: 2px solid transparent;
}

.site-header__nav-list a:hover,
.site-header__nav-list a[aria-current="page"] {
  border-bottom-color: var(--color-electric-blue);
  color: var(--color-electric-blue);
}

.site-header__nav-actions {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: var(--space-2);
}

.site-header__contact {
  justify-content: center;
  padding: 0.6rem 0.7rem;
  border: var(--border);
  background: var(--color-acid-green);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}

.site-header__contact:hover {
  transform: translate(-3px, -3px);
  border-color: var(--color-line-black);
  background: var(--color-raw-black);
  box-shadow: 5px 5px 0 var(--color-raw-black);
  color: var(--color-acid-green);
  text-decoration: none;
}

.site-header__age {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.35rem 0.55rem;
  border: var(--border);
  background: var(--color-sharp-yellow);
  color: var(--color-raw-black);
  font-family: var(--font-heading);
  font-size: var(--text-14);
  font-weight: 700;
  line-height: 1;
}

.site-header__toggle,
.site-header__close,
.site-header__nav-head,
.site-header__mobile-only {
  display: none;
}

@media (max-width: 76rem) {
  .site-header__inner {
    min-height: 4.75rem;
    justify-content: space-between;
  }

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

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

  .site-header__toggle {
    display: inline-flex;
    z-index: 2;
    flex: 0 0 2.75rem;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    min-height: 2.75rem;
    height: 2.75rem;
    gap: 0.25rem;
    padding: 0.35rem;
    border: var(--border);
    background: var(--color-acid-green);
  }

  .site-header__toggle:hover {
    transform: none;
    box-shadow: none;
    background: var(--color-raw-black);
  }

  .site-header__toggle-line {
    display: block;
    width: 1.25rem;
    height: 3px;
    background: var(--color-raw-black);
    transition: transform var(--transition-fast), opacity var(--transition-fast), background-color var(--transition-fast);
  }

  .site-header__toggle:hover .site-header__toggle-line,
  .site-header__toggle[aria-expanded="true"] .site-header__toggle-line {
    background: var(--color-acid-green);
  }

  .site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
    transform: translateY(7px) 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(-7px) rotate(-45deg);
  }

  .site-header__nav {
    position: fixed;
    z-index: 150;
    top: 0;
    right: 0;
    display: flex;
    visibility: hidden;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    width: min(100%, 28rem);
    height: 100dvh;
    min-height: 100vh;
    padding: var(--space-4);
    overflow-x: hidden;
    overflow-y: auto;
    border-left: var(--border-strong);
    background: var(--color-crisp-white);
    opacity: 0;
    pointer-events: none;
    transform: translateX(100%);
    transition: transform var(--transition-fast), opacity var(--transition-fast), visibility var(--transition-fast);
  }

  .site-header__nav.is-open {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    transform: translateX(0);
  }

  .site-header__nav-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 3rem;
    padding-bottom: var(--space-3);
    border-bottom: var(--border);
    font-family: var(--font-heading);
    font-weight: 700;
    text-transform: uppercase;
  }

  .site-header__close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    min-height: 2.75rem;
    height: 2.75rem;
    padding: 0;
    border: var(--border);
    background: var(--color-sharp-yellow);
    color: var(--color-raw-black);
    font-family: Arial, sans-serif;
    font-size: 2rem;
    line-height: 1;
  }

  .site-header__close:hover {
    transform: none;
    box-shadow: none;
    background: var(--color-raw-black);
    color: var(--color-sharp-yellow);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    margin: var(--space-4) 0 0;
  }

  .site-header__nav-list li,
  .site-header__nav-list li + li {
    display: block;
    margin: 0;
    border-bottom: 2px solid var(--color-line-black);
  }

  .site-header__nav-list a {
    display: flex;
    min-height: 3rem;
    padding: var(--space-2) 0;
    border: 0;
    font-size: var(--text-16);
    white-space: normal;
  }

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

  .site-header__mobile-only {
    display: block;
  }

  .site-header__nav-actions {
    margin-top: auto;
    padding-top: var(--space-4);
  }

  .site-header__contact {
    flex: 1 1 auto;
    font-size: var(--text-14);
  }
}

@media (max-width: 28rem) {
  .site-header__inner {
    gap: var(--space-2);
  }

  .site-header__brand {
    gap: var(--space-2);
  }

  .site-header__brand-name {
    font-size: 1.1rem;
  }
}

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

  .site-header__contact:hover {
    transform: none;
  }
}