/* Phone navigation stays outside the animated reading column. */
.about-mobile-header,
.about-mobile-menu { display: none; }

@media (max-width: 767px) {
  html.work-grid .portfolio-viewer.is-about-view.is-about-mobile-menu-open {
    overflow: hidden;
  }

  html.work-grid .portfolio-viewer-about .about-mobile-header {
    position: fixed;
    z-index: 8;
    top: calc(var(--portfolio-viewer-top, 0px) + max(var(--page-edge, 16px), env(safe-area-inset-top, 0px)));
    left: 32px;
    right: 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 44px;
    pointer-events: none;
  }

  .about-mobile-header::before {
    content: "";
    position: absolute;
    z-index: -1;
    inset: calc(-1 * max(var(--page-edge, 16px), env(safe-area-inset-top, 0px))) -32px -8px;
    background: color-mix(in srgb, var(--dark) 82%, transparent);
    border-bottom: 1px solid color-mix(in srgb, var(--heading) 10%, transparent);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    opacity: 0;
    transition: opacity 180ms ease;
  }
  .is-about-story-scrolled .about-mobile-header::before { opacity: 1; }

  html.work-grid .portfolio-viewer-about .about-mobile-header > .about-back-link {
    position: static;
    inset: auto;
    flex: 0 0 auto;
    margin: 0;
    min-height: 44px;
    align-items: center;
    pointer-events: auto;
  }

  html.work-grid .portfolio-viewer-about :is(.about-mobile-menu-toggle, .about-mobile-menu-close) {
    appearance: none;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    width: 44px;
    min-height: 44px;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: none;
    color: var(--heading);
    cursor: pointer;
    pointer-events: auto;
    -webkit-tap-highlight-color: transparent;
  }

  html.work-grid .portfolio-viewer-about :is(.about-mobile-menu-toggle, .about-mobile-menu-close) svg {
    width: 24px;
    height: 24px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7;
    stroke-linecap: round;
    pointer-events: none;
  }

  html.work-grid .portfolio-viewer-about .about-mobile-menu {
    position: fixed;
    z-index: 9;
    top: var(--portfolio-viewer-top, 0px);
    left: 0;
    right: 0;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    height: var(--portfolio-viewer-height, 100dvh);
    padding: calc(max(var(--page-edge, 16px), env(safe-area-inset-top, 0px)) + 76px) 32px max(32px, env(safe-area-inset-bottom, 0px));
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior-y: contain;
    touch-action: pan-y pinch-zoom;
    background: color-mix(in srgb, var(--dark) 82%, transparent);
    -webkit-backdrop-filter: blur(24px);
    backdrop-filter: blur(24px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 220ms ease;
  }

  html.work-grid .portfolio-viewer-about .about-mobile-menu[hidden] { display: none; }
  html.work-grid .portfolio-viewer-about .about-mobile-menu.is-open {
    opacity: 1;
    pointer-events: auto;
  }

  html.work-grid .portfolio-viewer-about .about-mobile-menu-close {
    position: absolute;
    top: max(var(--page-edge, 16px), env(safe-area-inset-top, 0px));
    right: 32px;
  }

  html.work-grid .portfolio-viewer-about .about-mobile-menu > .about-section-nav {
    position: static;
    inset: auto;
    display: flex;
    flex: 0 0 auto;
    flex-direction: column;
    align-items: stretch;
    align-self: stretch;
    justify-content: center;
    gap: 16px;
    margin: auto 0;
  }

  html.work-grid .portfolio-viewer-about .about-mobile-menu .about-section-nav button {
    box-sizing: border-box;
    display: block;
    min-height: 44px;
    padding: 4px 0;
    border: 0;
    background: none;
    color: var(--heading);
    font: 400 32px/1.25 var(--main-font);
    text-align: left;
    white-space: normal;
    opacity: .5;
    -webkit-tap-highlight-color: transparent;
  }

  html.work-grid .portfolio-viewer-about .about-mobile-menu .about-section-nav button[aria-current] {
    opacity: 1;
  }

  html.work-grid[data-theme="dark"] .portfolio-viewer-about .about-mobile-menu .about-section-nav button[aria-current] {
    color: var(--accent-orange);
  }

  html.work-grid .portfolio-viewer-about :is(.about-mobile-menu-toggle, .about-mobile-menu-close):focus-visible,
  html.work-grid .portfolio-viewer-about .about-mobile-menu .about-section-nav button:focus-visible {
    outline: 2px solid var(--heading);
    outline-offset: 4px;
    border-radius: 2px;
  }
}

@media (max-width: 767px) and (prefers-reduced-motion: reduce) {
  html.work-grid .portfolio-viewer-about .about-mobile-menu,
  .about-mobile-header::before { transition: none; }
}