/* Story Lab masthead (Figma 26:1528) — fixed overlay, always transparent on black slides */

:root {
  --site-header-padding-inline: clamp(1rem, 4vw, 2.625rem);
  --site-header-padding-block: 2rem;
  --site-header-wordmark-height: 2.375rem;
  /* Reserve space under fixed overlay (wordmark + vertical padding + border). */
  --site-header-block-size: calc(
    var(--site-header-wordmark-height) + 2 * var(--site-header-padding-block) + 1px
  );
}

.site-header {
  --site-header-border-subtle: rgba(255, 255, 255, 0.24);
  --site-header-bg-scrim: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.24) 0%,
    rgba(0, 0, 0, 0) 100%
  );

  position: relative;
  box-sizing: border-box;
  background: var(--site-header-bg-scrim);
  color: #fff;
  border-bottom: 1px solid var(--site-header-border-subtle);
}

.site-header--overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  margin: 0;
}

.site-header__inner {
  display: flex;
  align-items: center;
  min-height: calc(
    var(--site-header-wordmark-height) + 2 * var(--site-header-padding-block)
  );
  padding: var(--site-header-padding-block) var(--site-header-padding-inline);
  padding-left: max(var(--site-header-padding-inline), env(safe-area-inset-left));
  padding-right: max(var(--site-header-padding-inline), env(safe-area-inset-right));
  box-sizing: border-box;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: inherit;
  line-height: 0;
}

.site-header__sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header__brand:hover {
  text-decoration: none;
}

.site-header__brand:focus-visible {
  outline: 2px solid var(--muse-color-brand-medium-blue-40);
  outline-offset: 2px;
  border-radius: 4px;
}

.site-header__wordmark {
  display: block;
  flex-shrink: 0;
  height: var(--site-header-wordmark-height);
  width: auto;
  pointer-events: none;
}

.site-header__wordmark--dark {
  display: none;
}