.site-header {
  background-color: var(--color-surface-raised);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  z-index: 100;
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-height: 64px;
  padding-block: var(--space-2);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-ink);
  flex-shrink: 0;
}

.site-header__brand:hover {
  color: var(--color-ink);
  text-decoration: none;
}

.site-header__logo {
  width: 36px;
  height: 36px;
  object-fit: contain;
  display: block;
}

.site-header__wordmark {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
  white-space: nowrap;
}

.site-header__nav {
  margin-left: auto;
}

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

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

.site-header__nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 var(--space-1);
  font-size: var(--text-body-small-size);
  font-weight: 500;
  color: var(--color-ink);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.site-header__nav-list a:hover {
  color: var(--color-brand);
  text-decoration: none;
}

.site-header__nav-list a[aria-current="page"] {
  color: var(--color-brand);
  box-shadow: inset 0 -2px 0 0 var(--color-brand);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.site-header__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 var(--space-4);
  border-radius: var(--radius-medium);
  font-size: var(--text-body-small-size);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.site-header__cta--primary {
  background-color: var(--color-brand);
  color: var(--color-ink-inverse);
  border: 1px solid var(--color-brand);
}

.site-header__cta--primary:hover {
  background-color: var(--color-brand-hover);
  border-color: var(--color-brand-hover);
  color: var(--color-ink-inverse);
  text-decoration: none;
}

.site-header__cta--secondary {
  background-color: transparent;
  color: var(--color-brand);
  border: 1px solid var(--color-brand);
}

.site-header__cta--secondary:hover {
  background-color: var(--color-brand);
  color: var(--color-ink-inverse);
  text-decoration: none;
}

.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-medium);
}

.site-header__toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-ink);
  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: var(--focus-outline-width) solid var(--color-brand);
  outline-offset: var(--focus-outline-offset);
}

@media (max-width: 1023px) {
  .site-header__inner {
    flex-wrap: wrap;
  }

  .site-header__brand {
    margin-right: auto;
  }

  .site-header__nav {
    position: fixed;
    top: 0;
    left: 0;
    width: min(320px, 85vw);
    height: 100vh;
    background-color: var(--color-surface-raised);
    box-shadow: var(--shadow-elevated);
    transform: translateX(-100%);
    transition: transform var(--transition-fast);
    z-index: 200;
    overflow-y: auto;
    padding: var(--space-6) var(--space-4);
    margin-left: 0;
  }

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

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

  .site-header__nav-list a {
    display: flex;
    width: 100%;
    min-height: 48px;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-body-size);
    border-radius: var(--radius-medium);
  }

  .site-header__nav-list a:hover {
    background-color: var(--color-surface);
    color: var(--color-brand);
  }

  .site-header__nav-list a[aria-current="page"] {
    background-color: var(--color-surface);
    box-shadow: inset 3px 0 0 0 var(--color-brand);
  }

  .site-header__actions {
    margin-left: auto;
  }

  .site-header__cta {
    display: none;
  }

  .site-header__toggle {
    display: flex;
  }
}

@media (max-width: 767px) {
  .site-header__inner {
    min-height: 56px;
    padding-block: var(--space-1);
  }

  .site-header__logo {
    width: 28px;
    height: 28px;
  }

  .site-header__wordmark {
    font-size: 1rem;
    letter-spacing: 0.02em;
  }

  .site-header__brand {
    gap: 8px;
  }
}

@media (max-width: 359px) {
  .site-header__wordmark {
    display: none;
  }
}