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

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
  min-height: 72px;
}

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

.site-header__logo {
  display: block;
  width: 48px;
  height: 48px;
  object-fit: contain;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 220px;
}

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

.site-header__toggle:hover {
  background-color: rgba(31, 78, 140, 0.08);
}

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

.site-header__toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-cobalt);
  border-radius: 1px;
  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: flex;
  align-items: center;
  min-width: 0;
}

.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;
  flex-shrink: 0;
}

.site-header__nav-link {
  display: inline-block;
  padding: var(--space-2) 0;
  font-size: var(--text-body);
  font-weight: 500;
  line-height: 1.2;
  color: var(--color-ink);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-color);
  position: relative;
}

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

.site-header__nav-link:hover {
  color: var(--color-apricot);
}

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

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

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

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

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

  .site-header__toggle {
    display: flex;
  }

  .site-header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-warm-white);
    border-bottom: var(--border-light);
    box-shadow: var(--shadow-card);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-lift), visibility var(--transition-lift);
    visibility: hidden;
    z-index: 99;
  }

  .site-header__nav[data-open="true"] {
    max-height: 400px;
    visibility: visible;
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-3) var(--space-4);
    width: 100%;
  }

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

  .site-header__nav-link {
    display: block;
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-border-light);
    font-size: 1.125rem;
  }

  .site-header__nav-item:last-child .site-header__nav-link {
    border-bottom: none;
  }

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

@media (max-width: 480px) {
  .site-header__inner {
    padding-inline: var(--space-3);
    min-height: 56px;
  }

  .site-header__logo {
    width: 32px;
    height: 32px;
  }

  .site-header__brand-text {
    display: none;
  }

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

  .site-header__toggle-line {
    width: 20px;
  }
}