.sr{display:none}
  .sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
  :root { color-scheme: light dark; --accent: #E8505B; --muted: rgba(128,128,128,.9); --bg: #fff; --fg: #111; --carte: #fff; }
  :root[data-theme="dark"] { color-scheme: dark; --bg: #121214; --fg: #f2f2f4; }
  :root[data-theme="light"] { color-scheme: light; --bg: #fff; --fg: #111; }
  @media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --bg: #121214; --fg: #f2f2f4; } }
  * { box-sizing: border-box; }
  body { font: 17px/1.55 -apple-system, "Helvetica Neue", Helvetica, Arial, sans-serif; margin: 0; padding: 0 1.25rem 4rem; background: var(--bg); color: var(--fg); }
  .page { display: grid; grid-template-columns: 1fr; gap: 0 3rem; max-width: 72rem; margin: 0 auto; }
  main { max-width: 46rem; min-width: 0; }
  aside { display: none; }
  .page-simple { grid-template-columns: minmax(0, 46rem) !important; }
  .page-simple main h1 { font-size: 2rem; margin: 1rem 0 .5rem; }
  .page-simple main > p:first-of-type { font-size: 1.05rem; }
  .meta { color: var(--muted); font-size: .9rem; margin-top: 0; }
  @media (min-width: 64rem) {
    .page { grid-template-columns: 15rem minmax(0, 46rem); }
    aside { display: block; position: sticky; top: 4.2rem; align-self: start; padding-top: 1.5rem; font-size: .92rem; max-height: calc(100vh - 5rem); overflow-y: auto; }
  }
  aside h2 { font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 1.5rem 0 .5rem; }
  aside ul { list-style: none; margin: 0; padding: 0; }
  aside li { margin: .3rem 0; } aside a { color: inherit; text-decoration: none; } aside a:hover { color: var(--accent); }
  aside li.tache a { display: flex; gap: .5rem; align-items: baseline; } aside li.tache a::before { content: attr(data-n); color: var(--accent); font-weight: 600; min-width: 1.1rem; }
  .galerie { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: .9rem; margin: 1rem 0 .5rem; }
  .galerie a { display: block; } .galerie img { width: 100%; border-radius: 14px; box-shadow: 0 6px 20px rgba(0,0,0,.18); display: block; }
  .galerie figcaption { font-size: .8rem; color: var(--muted); margin-top: .4rem; text-align: center; }
  .galerie figure { margin: 0; }
  figure.mac { margin: 1.25rem 0 0; } figure.mac img { width: 100%; border-radius: 10px; box-shadow: 0 8px 28px rgba(0,0,0,.2); display: block; }
  figure.mac figcaption { font-size: .85rem; color: var(--muted); margin-top: .5rem; text-align: center; }
  dialog.lightbox { border: 0; padding: 0; background: transparent; max-width: min(92vw, 30rem); }
  dialog.lightbox::backdrop { background: rgba(0,0,0,.75); }
  dialog.lightbox img { width: 100%; border-radius: 18px; display: block; }
  dialog.lightbox p { color: #fff; text-align: center; margin: .6rem 0 0; font-size: .95rem; }
  dialog.lightbox button { position: absolute; top: .4rem; right: .4rem; border: 0; border-radius: 999px; width: 2rem; height: 2rem; background: rgba(0,0,0,.55); color: #fff; font-size: 1.1rem; cursor: pointer; }
  .bandeau { position: fixed; top: 0; left: 0; right: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: saturate(180%) blur(14px); -webkit-backdrop-filter: saturate(180%) blur(14px); border-bottom: 1px solid rgba(128,128,128,.25); }
  .bandeau .int { max-width: 72rem; margin: 0 auto; padding: .55rem 1.25rem; display: flex; align-items: center; gap: 1rem; }
  .bandeau .marque { display: flex; align-items: center; gap: .55rem; font-weight: 700; color: inherit; text-decoration: none; white-space: nowrap; }
  .bandeau .marque img { width: 28px; height: 28px; border-radius: 7px; }
  .bandeau nav { display: flex; gap: 1rem; flex: 1; overflow-x: auto; scrollbar-width: none; font-size: .92rem; }
  .bandeau nav::-webkit-scrollbar { display: none; }
  .bandeau nav a { color: var(--muted); text-decoration: none; white-space: nowrap; } .bandeau nav a:hover { color: var(--accent); }
  .outils { display: flex; gap: .5rem; align-items: center; font-size: .9rem; margin-left: auto; }
  .outils select, .outils button { font: inherit; font-size: .85rem; color: var(--fg); background: transparent; border: 1px solid rgba(128,128,128,.45); border-radius: 999px; padding: .25rem .6rem; cursor: pointer; }
  .outils button[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); }
  body { padding-top: 3.6rem; } h2[id], article[id] { scroll-margin-top: 4.2rem; }
  @media (max-width: 40rem) { .bandeau nav { display: none; } }
  header.entete { display: flex; gap: 1.25rem; align-items: center; margin: 1.5rem 0 2.5rem; }
  header.entete img { width: 112px; height: 112px; border-radius: 26px; box-shadow: 0 8px 24px rgba(0,0,0,.15); flex: none; }
  h1 { font-size: 2.4rem; margin: 0; line-height: 1.1; } .accroche { font-size: 1.25rem; color: var(--muted); margin: .35rem 0 0; }
  h2 { font-size: 1.35rem; margin: 2.5rem 0 .75rem; } h2.pourquoi { margin-top: 0; }
  dl { margin: 0; } dt { font-weight: 600; margin-top: 1rem; } dd { margin: .15rem 0 0; }
  .captures { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin: 2.5rem 0; }
  .captures figure { margin: 0; } .captures img { width: 100%; border-radius: 18px; box-shadow: 0 6px 20px rgba(0,0,0,.18); }
  .captures figcaption { font-size: .85rem; color: var(--muted); margin-top: .5rem; text-align: center; }
  .cta { display: inline-block; margin-top: 1.5rem; padding: .7rem 1.2rem; border-radius: 999px; background: var(--accent); color: #fff; font-weight: 600; }
  footer { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid rgba(128,128,128,.35); font-size: .9rem; color: var(--muted); display: flex; gap: 1.25rem; flex-wrap: wrap; }
  footer a { color: var(--accent); }
  .guide { display: grid; gap: 1.5rem; }
  .guide article { display: grid; grid-template-columns: 150px 1fr; gap: 1.25rem; align-items: start; }
  .guide img { width: 100%; border-radius: 16px; box-shadow: 0 6px 20px rgba(0,0,0,.18); }
  .guide h3 { margin: .25rem 0 .35rem; font-size: 1.05rem; }
  .guide p { margin: 0; font-size: .95rem; }
  @media (max-width: 520px) { .guide article { grid-template-columns: 110px 1fr; } }
  .faq details { border-top: 1px solid rgba(128,128,128,.3); padding: .6rem 0; }
  .faq summary { font-weight: 600; cursor: pointer; } .faq details p { margin: .5rem 0 0; }
  /* Guide et tutoriel : texte a gauche, capture a droite. */
  .bloc { display: grid; grid-template-columns: minmax(0, 1fr) 190px; gap: 0 1.5rem; }
  .bloc > h2 { grid-column: 1 / -1; border-top: 1px solid rgba(128,128,128,.25); padding-top: 1.5rem; }
  .bloc .txt { grid-column: 1; } .bloc figure { grid-column: 2; grid-row: 2; margin: .35rem 0 0; }
  .bloc figure img { width: 100%; border-radius: 16px; box-shadow: 0 6px 20px rgba(0,0,0,.18); display: block; }
  .bloc.sansimage { grid-template-columns: minmax(0, 1fr); }
  .bloc.large figure { grid-column: 1 / -1; grid-row: auto; } .bloc.large { grid-template-columns: minmax(0, 1fr); }
  .bloc p { margin: 0 0 .8rem; } .bloc ul { margin: 0 0 .8rem; padding-left: 1.2rem; } .bloc li { margin: .2rem 0; }
  .bloc .num { display: inline-flex; align-items: center; justify-content: center; width: 1.7rem; height: 1.7rem; margin-right: .5rem; border-radius: 999px; background: var(--accent); color: #fff; font-size: .95rem; }
  .but { font-size: 1.05rem; }
  .retenir { border-left: 3px solid var(--accent); padding-left: .8rem; color: var(--muted); font-size: .95rem; }
  .duree { display: inline-block; border: 1px solid rgba(128,128,128,.45); border-radius: 999px; padding: .15rem .7rem; font-size: .85rem; color: var(--muted); }
  .doc-intro { font-size: 1.1rem; }
  .cartes { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1rem; margin: 1rem 0 0; }
  .carte { display: block; padding: 1.1rem 1.25rem; border: 1px solid rgba(128,128,128,.35); border-radius: 16px; color: inherit; text-decoration: none; }
  .carte:hover { border-color: var(--accent); } .carte strong { display: block; font-size: 1.05rem; margin-bottom: .2rem; }
  .carte span { color: var(--muted); font-size: .95rem; }
  @media (max-width: 40rem) {
    .bloc { grid-template-columns: minmax(0, 1fr); }
    .bloc figure { grid-column: 1; grid-row: auto; max-width: 60%; margin-inline: auto; }
  }
  nav.sommaire { display: flex; gap: 1rem; flex-wrap: wrap; font-size: .95rem; margin: 0 0 1rem; }
  nav.sommaire a { color: var(--accent); text-decoration: none; }
  @media (min-width: 40rem) { nav.sommaire { display: none; } }