.site-header {
  position: relative;
  z-index: 100;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-graphite-grey-10);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--container-gutter);
  min-height: 72px;
}

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

.site-header__logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  flex-shrink: 0;
}

.site-header__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  min-width: 0;
}

.site-header__brand-name {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
  color: var(--color-fjord-blue);
}

.site-header__brand-subtitle {
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-graphite-grey);
  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-graphite-grey-20);
  border-radius: var(--radius-button);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.site-header__toggle:hover {
  background-color: var(--color-arctic-white);
  border-color: var(--color-fjord-blue);
}

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

.site-header__toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-fjord-blue);
  border-radius: 1px;
  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__nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 1;
  min-width: 0;
}

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

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

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-small-size);
  font-weight: 500;
  line-height: 1.2;
  color: var(--color-graphite-grey);
  text-decoration: none;
  white-space: nowrap;
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
}

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

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

.site-header__deck-number {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-seafoam-green);
  line-height: 1;
}

.site-header__nav-label {
  line-height: 1.2;
}

.site-header__cta {
  flex-shrink: 0;
  white-space: nowrap;
}

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

  .site-header__toggle {
    display: flex;
  }

  .site-header__nav {
    display: none;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
    padding: var(--space-3) 0 var(--space-4);
    background-color: var(--color-white);
    border-top: 1px solid var(--color-graphite-grey-10);
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .site-header__nav.is-open {
    display: flex;
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

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

  .site-header__nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-2);
    border-bottom: 1px solid var(--color-graphite-grey-10);
    font-size: var(--text-body-size);
  }

  .site-header__deck-number {
    font-size: 1.25rem;
    min-width: 2.5rem;
    text-align: center;
  }

  .site-header__cta {
    align-self: center;
    width: auto;
    margin-top: var(--space-2);
  }
}

@media (max-width: 480px) {
  .site-header__logo {
    width: 32px;
    height: 32px;
  }

  .site-header__brand-name {
    font-size: 1rem;
  }

  .site-header__brand-subtitle {
    font-size: 0.5rem;
  }
}