/* Shared phone presentation. Desktop lesson styles and calculation models stay intact. */
@media (max-width: 600px) {
  .phone-simulator .page-shell { width: calc(100% - 24px); padding-top: 12px; }
  .phone-simulator .page-shell > nav:first-child { margin-bottom: 10px; font-size: .875rem; }
  .phone-simulator .page-shell > nav a { display: inline-flex; align-items: center; min-height: 44px; }
  .phone-simulator .hero { margin-bottom: 14px; }
  .phone-simulator .hero h1 { font-size: 1.5rem; line-height: 1.35; margin-bottom: 8px; }
  .phone-simulator .hero > p:last-child { font-size: 1rem; line-height: 1.5; margin-bottom: 0; }
  .phone-simulator .eyebrow { font-size: .875rem; letter-spacing: 0; }
  .phone-simulator .simulator-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: 10px; align-items: start; }
  .phone-simulator .experiment-card { padding: 10px; border-radius: 14px; background: #fff; min-width: 0; overflow: visible; }
  .phone-simulator .mobile-sticky-scene { position: sticky; top: 0; z-index: 2; box-shadow: 0 6px 18px #173b521a; }
  .phone-simulator .experiment-heading, .phone-simulator .scene-heading { gap: 8px; align-items: center; flex-wrap: wrap; }
  .phone-simulator .experiment-card h2 { font-size: 1rem; line-height: 1.5; margin: 0; }
  .phone-simulator .scene-heading p { font-size: .875rem; line-height: 1.5; text-align: left; margin: 0; }
  .phone-simulator .mode-label { font-size: .875rem; }
  .phone-simulator .mobile-diagram-scroll { width: 100%; overflow-x: auto; overscroll-behavior-x: contain; border-radius: 10px; margin-top: 8px; background: #f5fafb; }
  .phone-simulator .mobile-diagram-scroll > svg { display: block; width: 100%; height: auto; min-height: 0; max-height: none; margin: 0; }
  .phone-simulator .mobile-diagram-scroll.is-zoomed > svg { width: 175%; max-width: none; }
  .phone-simulator .mobile-diagram-zoom { display: block; min-height: 44px; margin: 8px 0 0 auto; padding: 8px 12px; font-size: .875rem; border: 1px solid #087c86; color: #087c86; background: #fff; }
  .phone-simulator .mobile-diagram-scroll.is-zoomed::after { content: '左右に動かして見られます'; display: block; position: sticky; left: 0; width: 100%; padding: 6px; color: #315461; background: #edf7f8; font-size: .875rem; text-align: center; }
  .phone-simulator .control-panel { display: block; padding: 14px; border-radius: 14px; min-width: 0; }
  .phone-simulator .control-panel h2 { font-size: 1rem; margin: 0 0 8px; }
  .phone-simulator .control-panel label { font-size: 1rem; line-height: 1.5; margin: 12px 0 4px; }
  .phone-simulator .control-panel output { font-size: 1rem; }
  .phone-simulator .control-panel :is(input, button, select) { scroll-margin-top: calc(var(--mobile-sticky-height, 0px) + 12px); }
  .phone-simulator .control-panel button { min-height: 48px; margin-top: 12px; }
  .phone-simulator button, .phone-simulator select, .phone-simulator summary { min-height: 44px; }
  .phone-simulator select { max-width: 100%; min-width: 0; font-size: 1rem; text-overflow: ellipsis; }
  .phone-simulator input[type=range] { display: block; width: 100%; height: 44px; min-height: 44px; margin: 0; appearance: none; -webkit-appearance: none; background: transparent; cursor: pointer; }
  .phone-simulator input[type=range]::-webkit-slider-runnable-track { height: 8px; background: #b9dde0; border-radius: 4px; }
  .phone-simulator input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 28px; height: 28px; margin-top: -10px; border: 3px solid white; border-radius: 50%; background: #087c86; box-shadow: 0 0 0 1px #087c86; }
  .phone-simulator input[type=range]::-moz-range-track { height: 8px; border-radius: 4px; background: #b9dde0; }
  .phone-simulator input[type=range]::-moz-range-thumb { width: 24px; height: 24px; border: 3px solid white; border-radius: 50%; background: #087c86; box-shadow: 0 0 0 1px #087c86; }
  .phone-simulator input[type=checkbox] { width: 24px; height: 24px; vertical-align: middle; }
  .phone-simulator .range-labels, .phone-simulator .range-ends, .phone-simulator .timeline-labels,
  .phone-simulator .range-note, .phone-simulator .control-note, .phone-simulator .keyword-hint { font-size: .875rem; line-height: 1.6; }
  .phone-simulator .mobile-primary-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-top: 12px; }
  .phone-simulator .mobile-primary-actions button { margin: 0; min-height: 48px; padding: 10px 6px; font-size: .875rem; }
  .phone-simulator .control-panel .motion-heading { flex-wrap: wrap; }
  .phone-simulator .control-panel .collision-stages { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .phone-simulator .collision-stages button { margin: 0; }
  .phone-simulator .mobile-observations { padding: 14px; border: 1px solid #d8e3e7; border-radius: 14px; background: #fff; min-width: 0; overflow-wrap: anywhere; }
  .phone-simulator .mobile-observations[hidden], .phone-simulator .mobile-lesson-content[hidden] { display: none; }
  .phone-simulator .mobile-observations > :first-child { margin-top: 0; }
  .phone-simulator .mobile-observations > :last-child { margin-bottom: 0; }
  .phone-simulator .mobile-observations svg { display: block; width: 100%; height: auto; }
  .phone-simulator .mobile-observations .observation-panel { margin: 10px 0; padding: 12px; }
  .phone-simulator .mobile-observations p { font-size: 1rem; line-height: 1.65; }
  .phone-simulator .mobile-observations [class$='-readings'] { grid-template-columns: 1fr; }
  .phone-simulator .mobile-lesson-toggle { display: block; width: 100%; margin-top: 16px; padding: 14px; min-height: 52px; border: 1px solid #087c86; color: #087c86; background: #fff; text-align: left; font-size: 1rem; }
  .phone-simulator .questions-link-card { flex-direction: column; align-items: flex-start; gap: 8px; }
  .phone-simulator .page-actions { justify-content: flex-start; flex-wrap: wrap; margin: 16px 0 12px; }
  .phone-simulator .small-action { min-height: 44px; font-size: .875rem; }
  .phone-simulator .organism-photos { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin: 10px 0 0; }
  .phone-simulator .organism-photo { padding: 8px; }
  .phone-simulator .organism-photo figcaption { font-size: .875rem; }
  .phone-simulator .comparison-table { font-size: .875rem; }
  .phone-simulator .simulator-layout:fullscreen, .phone-simulator .simulator-layout.is-expanded { padding: 12px; }
  .phone-simulator :focus-visible { outline: 3px solid #c58220; outline-offset: 3px; }
}
@media print {
  .phone-simulator .mobile-lesson-content[hidden] { display: block; }
  .phone-simulator .mobile-lesson-toggle, .phone-simulator .mobile-diagram-zoom { display: none; }
  .phone-simulator .mobile-sticky-scene { position: static; }
}