/* Response 24 Hours v21 — mobile scroll chapters and accessible progress dots.
   Existing phone and human-story animation controllers are unchanged.
   Keep desktop alignment; use the existing 760px mobile breakpoint. */
@media (max-width: 760px) {
  /* Every phone / call-flow / dashboard chapter shares the same center line. */
  .r21 .chapter-copy {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding-top: 0;
    text-align: center;
  }
  .r21 .chapter-copy > h1,
  .r21 .chapter-copy > h2 {
    width: 100%;
    margin-inline: 0;
    text-align: center;
  }
  .r21 .chapter-copy > .chapter-description,
  .r21 .chapter-copy > .chapter-audience {
    width: 100%;
    max-width: 320px;
    margin-inline: auto;
    text-align: center;
  }
  .r21 .chapter-copy > .r15-button {
    align-self: center;
    flex-shrink: 0;
    justify-content: center;
    margin-inline: auto;
    min-height: 44px;
  }

  /* Visible 9px dots sit inside full 44px tap targets. The existing controller
     sets aria-current="step" on scroll, click, keyboard and reverse scrolling. */
  .r21 .chapter-navigation {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 2px 0;
  }
  .r21 .chapter-navigation::before { display: none; }
  .r21 .chapter-navigation > button {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 44px;
    width: 44px;
    min-width: 44px;
    height: 44px;
    min-height: 44px;
    margin: 0;
    padding: 0;
    border: 0;
    border-radius: 8px;
    background: transparent;
    gap: 0;
    cursor: pointer;
  }
  .r21 .chapter-navigation > button > span {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
  }
  .r21 .chapter-navigation > button > .icon { display: none; }
  .r21 .chapter-navigation > button::after {
    content: "";
    display: block;
    width: 9px;
    height: 9px;
    border: 1px solid #929ca3;
    border-radius: 50%;
    background: transparent;
    transition: background-color .2s, border-color .2s;
  }
  .r21 .chapter-navigation > button[aria-current="step"]::after {
    border-color: var(--ink);
    background: var(--ink);
  }
  .r21 .chapter-navigation > button:focus-visible {
    outline: 2px solid var(--red);
    outline-offset: 2px;
  }
  .r21 .chapter-navigation > button:hover::after {
    border-color: var(--ink);
  }

  /* Center the headings, stage labels and supporting copy through all four
     caller → route → team → record scenes, without changing the cards. */
  .r21 .call-story .scene-copy,
  .r21 .call-story .static-copy {
    text-align: center;
  }
  .r21 .call-story .scene-copy {
    display: block;
  }
  .r21 .call-story .static-copy {
    width: 100%;
    margin-inline: auto;
  }
  .r21 .call-story .scene-copy > div,
  .r21 .call-story .scene-copy > p,
  .r21 .call-story .static-copy > p {
    margin-inline: auto;
  }
  .r21 .call-story .chapter-kicker {
    justify-content: center;
    text-align: center;
  }
  .r21 .call-story .scene-copy h3,
  .r21 .call-story .static-copy h3 {
    text-align: center;
  }
}