.site-header {
  position: relative;
  z-index: 100;
  min-height: 5.75rem;
}

.site-header__bar {
  min-height: 5.75rem;
  border-block-end: 1px solid var(--color-border);
  background: rgb(246 241 231 / 96%);
}

@supports (backdrop-filter: blur(8px)) {
  .site-header__bar {
    background: rgb(255 253 248 / 84%);
    backdrop-filter: blur(12px);
  }
}

.site-header__inner {
  display: flex;
  align-items: center;
  min-height: 5.75rem;
  gap: var(--space-5);
}

.site-header__brand {
  display: inline-flex;
  flex: 0 1 auto;
  align-items: center;
  min-width: 0;
  gap: 0.7rem;
  color: var(--color-juniper-green);
  text-decoration: none;
}

.site-header__brand:hover {
  color: var(--color-deep-juniper);
}

.site-header__mark {
  flex: 0 0 3.1rem;
  width: 3.1rem;
  height: 3.1rem;
  object-fit: contain;
}

.site-header__brand-copy {
  display: block;
  min-width: 0;
}

.site-header__brand .brand-name,
.site-header__brand .brand-subtitle {
  display: block;
}

.site-header__nav {
  flex: 1 1 auto;
  min-width: 0;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(0.7rem, 1.25vw, 1.3rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.site-header__nav-list a {
  display: block;
  padding-block: 0.45rem;
  color: var(--color-deep-juniper);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.2;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header__nav-list a:hover,
.site-header__nav-list a[aria-current="page"] {
  color: var(--color-juniper-green);
  text-decoration: underline;
  text-decoration-color: var(--color-persimmon);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.45rem;
}

.site-header__actions {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
}

.site-header__actions .button {
  min-height: 2.5rem;
  padding-inline: 0.8rem;
  font-size: 0.65rem;
  white-space: nowrap;
}

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

@media (max-width: 78rem) {
  .site-header {
    min-height: 5.25rem;
  }

  .site-header__bar,
  .site-header__inner {
    min-height: 5.25rem;
  }

  .site-header__inner {
    justify-content: space-between;
    gap: var(--space-3);
  }

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

  .site-header__brand .brand-subtitle {
    display: none;
  }

  .site-header__actions {
    display: none;
  }

  .site-header__toggle {
    display: inline-grid;
    flex: 0 0 2.75rem;
    width: 2.75rem;
    height: 2.75rem;
    place-content: center;
    gap: 0.28rem;
    padding: 0;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-control);
    background: var(--color-paper-white);
    color: var(--color-juniper-green);
  }

  .site-header__toggle-line {
    display: block;
    width: 1.2rem;
    height: 1px;
    background: currentColor;
    transform-origin: center;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
  }

  .site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
    transform: translateY(0.38rem) 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(-0.38rem) rotate(-45deg);
  }

  .site-header__nav {
    position: absolute;
    z-index: 110;
    top: 100%;
    right: 0;
    left: 0;
    display: grid;
    grid-template-rows: auto 1fr auto;
    width: min(100%, 34rem);
    max-height: min(42rem, calc(100vh - 5.25rem));
    margin-inline: auto;
    overflow: auto;
    border: 1px solid var(--color-border-strong);
    border-block-start: 0;
    background: var(--color-paper-white);
    box-shadow: var(--shadow-elevation);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-0.75rem);
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
    visibility: hidden;
  }

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

  .site-header__nav-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-5);
    border-block-end: 1px solid var(--color-border);
  }

  .site-header__nav-title {
    color: var(--color-juniper-green);
    font-size: var(--text-meta);
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
  }

  .site-header__close {
    display: grid;
    flex: 0 0 2.25rem;
    width: 2.25rem;
    height: 2.25rem;
    place-items: center;
    padding: 0;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-control);
    background: transparent;
    color: var(--color-deep-aubergine);
    font-size: 1.65rem;
    line-height: 1;
  }

  .site-header__nav-list {
    display: grid;
    align-content: start;
    justify-content: stretch;
    gap: 0;
    padding: var(--space-3) var(--space-5);
  }

  .site-header__nav-list a {
    padding-block: 0.85rem;
    border-block-end: 1px solid var(--color-border);
    font-size: var(--text-utility);
    letter-spacing: 0.1em;
  }

  .site-header__nav-footer {
    display: grid;
    gap: var(--space-4);
    padding: var(--space-5);
    border-block-start: 1px solid var(--color-border);
    background: var(--color-warm-ivory);
  }

  .site-header__nav-footer .running-line {
    font-size: 0.64rem;
  }
}

@media (max-width: 30rem) {
  .site-header__brand {
    gap: var(--space-2);
  }

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

  .site-header__brand .brand-name {
    font-size: 0.75rem;
  }

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

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