.site-header {
  position: relative;
  z-index: 1000;
  background-color: var(--color-paper);
  border-bottom: 1px solid var(--color-charcoal-border-subtle);
  height: var(--header-height-mobile);
  display: flex;
  align-items: center;
}

.site-header__inner {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-gutter-mobile);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  height: 100%;
}

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

.site-header__logo {
  width: 32px;
  height: 32px;
  object-fit: contain;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-header__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
  position: relative;
  z-index: 1001;
}

.site-header__toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-charcoal);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

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

.site-header__nav {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(100%, 320px);
  max-width: 100%;
  background-color: var(--color-paper);
  z-index: 1000;
  transform: translateX(100%);
  transition: transform var(--transition-menu);
  display: flex;
  flex-direction: column;
  padding: var(--space-lg);
  padding-top: calc(var(--header-height-mobile) + var(--space-lg));
  overflow-y: auto;
  box-shadow: var(--color-shadow-float);
}

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

.site-header__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.site-header__item {
  margin: 0;
  padding: 0;
}

.site-header__link {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  line-height: 1.2;
  font-weight: 500;
  color: var(--color-charcoal);
  text-decoration: none;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

.site-header__link:hover {
  color: var(--color-terracotta);
}

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

.site-header__cta {
  margin-top: var(--space-lg);
  align-self: flex-start;
}

@media (min-width: 768px) {
  .site-header {
    height: var(--header-height-desktop);
  }

  .site-header__inner {
    padding-inline: var(--container-gutter-desktop);
  }

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

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

  .site-header__toggle {
    display: none;
  }

  .site-header__nav {
    position: static;
    transform: none;
    width: auto;
    max-width: none;
    background: none;
    box-shadow: none;
    padding: 0;
    flex-direction: row;
    align-items: center;
    gap: var(--space-xl);
    overflow: visible;
  }

  .site-header__list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-lg);
  }

  .site-header__link {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.2;
    padding: 0;
  }

  .site-header__cta {
    margin-top: 0;
    align-self: center;
  }
}

@media (min-width: 1024px) {
  .site-header__inner {
    gap: var(--space-xl);
  }

  .site-header__list {
    gap: var(--space-xl);
  }
}