/* Mobile presentation only. Desktop keeps its original layout and typography. */
@media (max-width: 720px), (max-width: 1050px) and (pointer: coarse) and (max-height: 600px) {
  .app {
    width: auto;
    margin-inline: max(14px, env(safe-area-inset-left)) max(14px, env(safe-area-inset-right));
    padding: 22px 0 max(28px, env(safe-area-inset-bottom));
  }
  .topbar { grid-template-columns: minmax(0, 1fr) 48px; gap: 18px 8px; min-height: 0; }
  .topbar > div { grid-column: 1 / -1; min-width: 0; }
  .eyebrow { margin-bottom: 10px; font-size: 11px; line-height: 1.4; }
  .eyebrow .bilingual-text { display: flex; flex-wrap: wrap; gap: 4px 10px; align-items: baseline; }
  .eyebrow .lang-en { margin: 0; font-size: 11px; }
  h1 { font-size: clamp(28px, 8.3vw, 36px); line-height: 1.2; }
  h1 .bilingual-text > .lang-en { margin-top: 7px; font-size: 14px; line-height: 1.4; color: var(--muted); }
  h2 { font-size: 25px; line-height: 1.25; }
  .mode-tabs {
    grid-column: 1; grid-row: 2; order: initial;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 3px; padding: 4px; border: 0; border-radius: 12px;
    background: #dfeae7; box-shadow: none;
  }
  .mode-tab { min-width: 0; min-height: 54px; padding: 7px 3px; gap: 0; border-radius: 9px; font-size: 14px; text-align: center; justify-content: center; }
  .mode-tab > span[aria-hidden="true"] { display: none; }
  .mode-tab > .bilingual-text { flex: 1; }
  .mode-tab .lang-en { font-size: 10px; white-space: nowrap; }
  .mode-tab.active { box-shadow: 0 3px 8px rgba(11,114,133,.16); }
  .icon-button { grid-column: 2; grid-row: 2; width: 48px; height: 62px; border-radius: 12px; box-shadow: none; }
  .simulation-split, .charts, .scan-result-grid { grid-template-columns: minmax(0, 1fr); gap: 14px; }
  .simulation-split { margin-top: 18px; }
  .view-panel, .side-panel, .chart-panel, .scan-imaging, .mode-guide {
    min-width: 0; border-radius: 16px; border-color: #dce6e2;
    box-shadow: 0 4px 18px rgba(19,47,51,.045);
  }
  .view-panel { min-height: 0; overflow: hidden; }
  .panel-label {
    position: static; padding: 13px 15px; border: 0; border-bottom: 1px solid #e5ece9;
    background: #fff; font-size: 13px;
  }
  .panel-label .bilingual-text { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
  .panel-label .lang-en { margin: 0; font-size: 11px; color: var(--muted); }
  #scene { min-height: 0; height: calc((100vw - 30px) * 0.7222); max-height: 360px; }
  #scene3d { min-height: 0; height: clamp(270px, 78vw, 390px); }
  .side-panel { grid-template-columns: minmax(0,1fr); gap: 22px; padding: 20px 16px; }
  .side-panel > *, .scan-imaging-heading > *, .mode-guide-label { min-width: 0; }
  .mode-kicker { font-size: 11px; margin-bottom: 8px; }
  #modeDescription { font-size: 14px; line-height: 1.75; }
  .facts { gap: 12px; }
  .facts div { grid-template-columns: 74px minmax(0,1fr); gap: 10px; }
  .facts dd { overflow-wrap: anywhere; font-size: 14px; }
  .controls { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; }
  .controls label { grid-template-columns: minmax(0,1fr); gap: 3px; padding: 12px 10px 4px; border: 1px solid #e0e9e5; border-radius: 10px; background: #f7faf9; font-size: 12px; }
  .controls output { font-size: 16px; color: var(--teal-dark); white-space: nowrap; }
  .controls label:last-child { grid-column: 1 / -1; }
  input[type="range"], #scanProgress { min-width: 0; height: 44px; margin: 0; touch-action: pan-y; }
  .chart-panel { aspect-ratio: auto; padding: 16px 12px 10px; }
  .chart-heading { display: grid; grid-template-columns: minmax(0,1fr); gap: 8px; }
  .chart-heading h3 { margin: 0; font-size: 16px; }
  .chart-heading > span { text-align: left; margin-bottom: 4px; font-size: 12px; color: var(--teal-dark); }
  .chart-heading > span .bilingual-text { display: flex; flex-wrap: wrap; gap: 4px 10px; align-items: baseline; }
  .chart-heading > span .lang-en { margin: 0; color: var(--muted); }
  .chart-panel > canvas { height: clamp(205px, 55vw, 270px); }
  .scan-imaging { padding: 20px 12px 12px; }
  .scan-imaging-heading { display: grid; gap: 16px; padding-inline: 4px; }
  .scan-imaging-description { font-size: 13px; line-height: 1.7; }
  .scan-status { min-width: 0; justify-items: start; white-space: normal; padding: 10px 12px; border-radius: 9px; background: #f1f6f4; font-size: 12px; }
  .scan-status strong { font-size: 13px; }
  .scan-status strong .bilingual-text { display: flex; gap: 10px; align-items: baseline; }
  .scan-status strong .lang-en { margin: 0; }
  .scan-playback-controls { grid-template-columns: minmax(0,1fr); gap: 12px; padding: 14px 12px; border-radius: 12px; }
  .scan-playback-actions { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 8px; }
  .scan-action { min-width: 0; min-height: 54px; padding: 10px 6px; border-radius: 8px; font-size: 13px; }
  #scanProgressHint { font-size: 11px; }
  .scan-image-panel { border-radius: 12px; }
  .scan-image-toolbar { flex-direction: column; align-items: flex-start; gap: 8px; padding: 13px 12px; }
  .scan-image-toolbar strong { font-size: 15px; }
  .scan-image-toolbar > span { font-size: 12px; }
  .scan-image-toolbar > span .bilingual-text { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px; }
  .scan-image-toolbar > span .lang-en { margin: 0; }
  #scanImage { height: clamp(255px, 78vw, 390px); }
  #scanImage3d { height: clamp(260px, 80vw, 390px); }
  .scan-image-footer { grid-template-columns: auto minmax(0,1fr) auto auto; gap: 8px; padding-inline: 10px; font-size: 11px; }
  .fast-axis-label { grid-column: 1 / -1; justify-self: start; }
  .scan-3d-footer { flex-direction: column; align-items: flex-start; gap: 8px; padding-inline: 10px; font-size: 11px; }
  .mode-guide { padding: 20px 12px 12px; }
  .mode-guide-header { flex-direction: column; align-items: flex-start; gap: 12px; padding-inline: 4px; }
  .mode-guide-header h2 { font-size: 25px; }
  .mode-guide-hint { max-width: 100%; border-radius: 8px; font-size: 11px; padding: 7px 10px; }
  .mode-guide-accordion { padding: 0; gap: 10px; border: 0; background: transparent; }
  .mode-guide-trigger { min-height: 76px; gap: 10px; padding: 14px 12px; }
  .mode-guide-number { flex-basis: 28px; height: 28px; }
  .mode-guide-label { font-size: 15px; }
  .mode-guide-arrow { margin-left: 0; }
  .mode-guide-panel { padding: 18px 14px; }
  .mode-guide-copy { font-size: 15px; line-height: 1.75; }
  .mode-guide-copy--definitions .mode-guide-block { grid-template-columns: minmax(0,1fr); gap: 7px; }
  .mode-guide-copy--comparison, .mode-guide-copy--precautions ol { grid-template-columns: minmax(0,1fr); gap: 20px; }
  .mode-guide-copy--comparison .mode-guide-block + .mode-guide-block { padding: 18px 0 0; border-left: 0; border-top: 1px solid #e9e5f1; }
}
@media (max-width: 360px) {
  .app { margin-inline: 10px; }
  .topbar { column-gap: 6px; }
  .mode-tab { font-size: 13px; }
  .mode-tab .lang-en { font-size: 9px; }
  .facts div { grid-template-columns: minmax(0,1fr); gap: 7px; }
  .controls { grid-template-columns: minmax(0,1fr); }
  .controls label { grid-template-columns: minmax(0,1fr) auto; align-items: center; }
  .scan-playback-controls { padding: 10px; }
  .scan-playback-actions { grid-template-columns: minmax(0,1fr); }
}