/* Ohm : boutique de démonstration One-to-One. Sobre, lisible, contrastes AA. */
:root {
  --ink: #111318;
  --muted: #5a5f6b;
  --line: #e4e6eb;
  --bg: #ffffff;
  --soft: #f5f6f8;
  --accent: #2f4bff;
  --radius: 18px;
  --wrap: 1180px;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-size-adjust: 100%;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: flex; flex-direction: column; line-height: 1.5; }
main { flex: 1; width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 32px 24px 72px; outline: none; }
a { color: inherit; }
h1, h2 { line-height: 1.12; letter-spacing: -0.02em; margin: 0; text-wrap: balance; }
h1 { font-size: clamp(28px, 4vw, 44px); font-weight: 750; }
h2 { font-size: 22px; font-weight: 700; }
.lead { color: var(--muted); font-size: 17px; margin: 12px 0 0; text-wrap: pretty; }
.muted { color: var(--muted); font-size: 14px; }
.eyebrow { margin: 0 0 10px; font-size: 13px; font-weight: 650; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); }
.ico { width: 20px; height: 20px; stroke-width: 2; flex: none; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.skip { position: absolute; left: 12px; top: -48px; padding: 8px 14px; border-radius: 10px; background: var(--ink); color: #fff; z-index: 10; }
.skip:focus { top: 12px; }

/* En-tête */
.top { position: sticky; top: 0; z-index: 5; background: rgba(255, 255, 255, 0.92); backdrop-filter: saturate(1.4) blur(12px); -webkit-backdrop-filter: saturate(1.4) blur(12px); border-bottom: 1px solid var(--line); }
.top__inner { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; height: 64px; display: flex; align-items: center; gap: 28px; }
.logo { font-size: 26px; font-weight: 800; letter-spacing: -0.04em; text-decoration: none; }
.logo span { color: var(--accent); }
.nav { display: flex; gap: 22px; font-size: 15px; }
.nav a { text-decoration: none; color: var(--muted); padding: 6px 0; }
.nav a:hover, .nav a[aria-current='page'] { color: var(--ink); }
.top__actions { margin-left: auto; display: flex; align-items: center; gap: 18px; font-size: 15px; }
.advice-link { text-decoration: none; font-weight: 600; }
.cart-link { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; font-weight: 600; }
.badge { min-width: 22px; height: 22px; padding: 0 6px; border-radius: 999px; background: var(--ink); color: #fff; font-size: 12px; line-height: 22px; text-align: center; font-variant-numeric: tabular-nums; }

/* Boutons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 48px; padding: 0 22px; border-radius: 999px; border: 1.5px solid var(--ink); background: var(--ink); color: #fff; font: inherit; font-size: 16px; font-weight: 650; text-decoration: none; cursor: pointer; transition: transform 120ms ease, background-color 160ms ease; }
.btn:hover { background: #2a2d36; border-color: #2a2d36; }
.btn:active { transform: scale(0.98); }
.btn:disabled { background: var(--soft); border-color: var(--line); color: var(--muted); cursor: not-allowed; }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--soft); border-color: var(--ink); }
.btn--wide { width: 100%; }

/* Accueil */
.hero { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: end; padding: 24px 0 48px; border-bottom: 1px solid var(--line); }
.hero h1 { max-width: 16ch; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.perks { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; color: var(--muted); }
.perks li { display: flex; align-items: center; gap: 12px; }
.perks .ico { color: var(--ink); }
.shelf { padding-top: 40px; }
.shelf__head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 20px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card { display: flex; flex-direction: column; text-decoration: none; }
.card .art { margin-bottom: 14px; transition: transform 240ms ease; }
.card:hover .art { transform: translateY(-3px); }
.card__cat { font-size: 13px; color: var(--muted); }
.card__name { font-weight: 650; font-size: 17px; }
.card__price { margin-top: 2px; font-variant-numeric: tabular-nums; }

/* Illustrations produit */
.art { aspect-ratio: 4 / 3; border-radius: var(--radius); display: grid; place-items: center; }
.art--large { aspect-ratio: 1 / 1; }
.art__ico { width: 38%; height: 38%; stroke-width: 1.1; }
.art--blue { background: linear-gradient(150deg, #eef2ff, #d9e1ff); color: #23308f; }
.art--violet { background: linear-gradient(150deg, #f4efff, #e2d8ff); color: #4b2a99; }
.art--slate { background: linear-gradient(150deg, #f1f3f6, #dde2ea); color: #2b3240; }
.art--green { background: linear-gradient(150deg, #ecfaf3, #d2f0e1); color: #145c3c; }
.art--amber { background: linear-gradient(150deg, #fff6e8, #ffe6c2); color: #7a4a06; }
.art--rose { background: linear-gradient(150deg, #fff0f2, #ffd9df); color: #8f1f33; }

/* Fiche produit */
.crumbs { display: flex; gap: 8px; font-size: 14px; color: var(--muted); margin-bottom: 20px; }
.crumbs a { color: var(--muted); }
.pdp { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.pdp__info { position: sticky; top: 88px; }
.pdp__price { font-size: 28px; font-weight: 700; margin: 20px 0 6px; font-variant-numeric: tabular-nums; }
.variants { border: 0; margin: 14px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.variants legend { font-size: 14px; font-weight: 650; margin-bottom: 10px; padding: 0; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.chip span { display: inline-flex; align-items: center; min-height: 44px; padding: 0 18px; border-radius: 999px; border: 1.5px solid var(--line); font-size: 15px; }
.chip input:checked + span { border-color: var(--ink); background: var(--soft); font-weight: 650; }
.chip input:focus-visible + span { outline: 3px solid var(--accent); outline-offset: 2px; }
.chip.is-out span { color: var(--muted); border-style: dashed; }
.chip.is-out input { cursor: not-allowed; }
.stock { margin: 16px 0 14px; font-size: 14px; color: #146c43; font-weight: 600; }
.expert { margin-top: 28px; padding: 22px; border-radius: var(--radius); background: var(--soft); }
.expert h2 { font-size: 18px; }
.expert p { margin: 6px 0 16px; color: var(--muted); }
.expert__cta { display: flex; flex-wrap: wrap; gap: 10px; }
.specs { margin-top: 56px; max-width: 760px; }
.specs dl { margin: 16px 0 0; }
.specs dl div { display: grid; grid-template-columns: 200px 1fr; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.specs dt { color: var(--muted); }
.specs dd { margin: 0; }

/* Panier et confirmation */
.page-title { margin-bottom: 24px; }
.basket { display: grid; grid-template-columns: 1fr 320px; gap: 32px; align-items: start; }
.lines { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.line { display: grid; grid-template-columns: 1fr auto auto; gap: 20px; align-items: center; padding: 18px 0; border-bottom: 1px solid var(--line); }
.line strong, .line .muted { display: block; }
.line__price { font-weight: 650; font-variant-numeric: tabular-nums; min-width: 96px; text-align: right; }
.qty { display: inline-flex; align-items: center; border: 1.5px solid var(--line); border-radius: 999px; }
.qty button { width: 44px; height: 44px; border: 0; background: none; font-size: 18px; cursor: pointer; border-radius: 999px; color: var(--ink); }
.qty span { min-width: 24px; text-align: center; font-variant-numeric: tabular-nums; }
.summary { padding: 22px; border-radius: var(--radius); background: var(--soft); }
.summary p { display: flex; justify-content: space-between; margin: 0 0 6px; font-size: 18px; }
.summary .muted { font-size: 14px; margin-bottom: 18px; }
.empty { max-width: 620px; padding: 48px 0; }
.empty .btn { margin-top: 24px; }

/* Pied de page, toast */
.foot { border-top: 1px solid var(--line); background: var(--soft); }
.foot__inner { max-width: var(--wrap); margin: 0 auto; padding: 28px 24px calc(28px + env(safe-area-inset-bottom, 0px)); font-size: 14px; color: var(--muted); }
.foot p { margin: 0 0 6px; }
.toast { position: fixed; left: 50%; top: 80px; transform: translate(-50%, -8px); padding: 10px 18px; border-radius: 999px; background: var(--ink); color: #fff; font-size: 14px; opacity: 0; pointer-events: none; transition: opacity 200ms ease, transform 200ms ease; z-index: 20; }
.toast.is-on { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 900px) {
  .nav { display: none; }
  .hero, .pdp, .basket { grid-template-columns: 1fr; }
  .pdp__info { position: static; }
  .grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
}
@media (max-width: 520px) {
  main { padding: 20px 16px 96px; }
  .top__inner { padding: 0 16px; gap: 16px; }
  .advice-link { display: none; }
  .hero__cta .btn, .expert__cta .btn { flex: 1 1 100%; }
  .specs dl div { grid-template-columns: 1fr; gap: 2px; }
  .line { grid-template-columns: 1fr auto; }
  .line__price { grid-column: 2; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 1ms !important; }
}