.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-ink);
  border-bottom: 1px solid var(--color-gold-translucent);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 72px;
  padding-block: var(--space-3);
}

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

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

.site-header__logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  display: block;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: var(--text-h4-size);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  line-height: 1.2;
  white-space: nowrap;
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-gold);
  border-radius: var(--radius-button);
  cursor: pointer;
  transition: border-color var(--transition-color), background-color var(--transition-color);
}

.site-header__toggle:hover {
  border-color: var(--color-crimson);
  background-color: rgba(142, 38, 53, 0.1);
}

.site-header__toggle:focus-visible {
  outline: 2px solid var(--color-focus-outline);
  outline-offset: 2px;
}

.site-header__toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-champagne);
  transition: transform var(--transition-color), opacity var(--transition-color);
}

.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 {
  display: block;
}

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

.site-header__close {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-gold);
  border-radius: var(--radius-button);
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color var(--transition-color);
}

.site-header__close:hover,
.site-header__close:focus-visible {
  border-color: var(--color-crimson);
}

.site-header__close-line {
  position: absolute;
  top: 50%;
  left: 50%;
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-champagne);
}

.site-header__close-line:nth-child(1) {
  transform: translate(-50%, -50%) rotate(45deg);
}

.site-header__close-line:nth-child(2) {
  transform: translate(-50%, -50%) rotate(-45deg);
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-header__nav-item {
  margin: 0;
  padding: 0;
}

.site-header__nav-link {
  display: inline-block;
  padding: var(--space-2) 0;
  font-family: var(--font-heading);
  font-size: var(--text-small-size);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-champagne);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-color);
  position: relative;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-crimson);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-color);
}

.site-header__nav-link:hover,
.site-header__nav-link:focus-visible {
  color: var(--color-crimson);
}

.site-header__nav-link:hover::after,
.site-header__nav-link:focus-visible::after {
  transform: scaleX(1);
}

.site-header__nav-link[aria-current="page"] {
  color: var(--color-crimson);
}

.site-header__nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

@media (max-width: 1024px) {
  .site-header__inner {
    min-height: 64px;
  }

  .site-header__logo {
    width: 40px;
    height: 40px;
  }

  .site-header__brand-text {
    font-size: var(--text-h4-size);
  }

  .site-header__toggle {
    display: flex;
  }

  .site-header__nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 85vw);
    max-width: 100%;
    background-color: var(--color-ink);
    border-left: 1px solid var(--color-gold-translucent);
    padding: var(--space-6) var(--space-5);
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
    overflow-y: auto;
    z-index: 1001;
    box-shadow: -4px 0 12px rgba(0, 0, 0, 0.5);
  }

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

  .site-header__nav-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    margin-block-end: var(--space-4);
    padding-block-end: var(--space-3);
    border-block-end: 1px solid var(--color-gold-translucent);
  }

  .site-header__nav-title {
    font-family: var(--font-heading);
    font-size: var(--text-h4-size);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    color: var(--color-champagne);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
  }

  .site-header__nav-link {
    display: block;
    padding: var(--space-3) var(--space-2);
    font-size: var(--text-h4-size);
    border-bottom: 1px solid var(--color-gold-translucent);
  }

  .site-header__nav-link::after {
    display: none;
  }

  .site-header__nav-link:hover,
  .site-header__nav-link:focus-visible {
    background-color: rgba(142, 38, 53, 0.1);
    color: var(--color-crimson);
  }
}

@media (max-width: 480px) {
  .site-header__inner {
    min-height: 56px;
    padding-block: var(--space-2);
  }

  .site-header__logo {
    width: 36px;
    height: 36px;
  }

  .site-header__brand-text {
    font-size: var(--text-body-size);
  }

  .site-header__toggle {
    width: 40px;
    height: 40px;
  }

  .site-header__nav {
    padding: var(--space-5) var(--space-4);
  }
}