:root {
    --ink: #10151c;
    --steel: #1a212b;
    --steel-2: #212b37;
    /* --paper: #212529; */
    --paper: #eef1f4;
    --mist: #8d99a8;
    --line: rgba(238,241,244,0.14);
    --safety: #ff5a2b;
    --safety-dim: rgba(255,90,43,0.16);
    --font-display: "Oswald", "Arial Narrow", Impact, sans-serif;
    --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  }
  * { box-sizing: border-box; }
  html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(72px + env(safe-area-inset-top, 0px));
  }
  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
  }
  body {
    margin: 0;
    background: var(--ink);
    color: var(--paper);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.55;
    padding-top: env(safe-area-inset-top, 0px);
    padding-bottom: env(safe-area-inset-bottom, 0px);
    background-image:
      linear-gradient(var(--line) 1px, transparent 1px),
      linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 64px 64px;
    background-position: center top;
  }
  a { color: inherit; }
  .wrap { max-width: 1180px; margin: 0 auto; padding: 0 28px; }

  /* ---------- Header ---------- */
  header.site {
    position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
    background: rgba(16,21,28,0.86);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line);
  }
  header.site .bar {
    display: flex; align-items: center; justify-content: space-between;
    gap: 20px; padding: 16px 28px; max-width: 1180px; margin: 0 auto;
  }
  .brand { display: flex; align-items: baseline; gap: 9px; text-decoration: none; }
  .brand .mark { width: 9px; height: 9px; border-radius: 50%; background: var(--safety); flex-shrink: 0; }
  .brand .word {
    font-family: var(--font-display); font-weight: 600; font-size: 21px;
    letter-spacing: 0.5px; color: var(--paper);
  }
  nav.site-nav { display: flex; gap: 28px; }
  nav.site-nav a {
    font-size: 14px; color: var(--mist); text-decoration: none; font-weight: 500;
    padding: 4px 0; border-bottom: 1px solid transparent;
  }
  nav.site-nav a:hover { color: var(--paper); border-color: var(--line); }
  .nav-cta {
    font-size: 13.5px; font-weight: 600; color: var(--ink) !important;
    background: var(--safety); padding: 9px 16px; border-radius: 3px;
    text-decoration: none; white-space: nowrap;
  }
  .nav-cta:hover { background: #ff744d; }
  .menu-btn {
    display: none; background: none; border: 1px solid var(--line); color: var(--paper);
    width: 38px; height: 38px; border-radius: 3px; cursor: pointer; font-size: 16px;
  }

  /* ---------- Hero ---------- */
  .hero {
    display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 40px; align-items: center;
    padding: 88px 0 76px;
  }
  .hero-copy .kicker {
    font-family: var(--font-body); font-size: 14px; color: var(--mist);
    margin: 0 0 18px; max-width: 30ch;
  }
  .hero-copy h1 {
    font-family: var(--font-display); font-weight: 600; font-size: clamp(34px, 4.6vw, 54px);
    line-height: 1.08; letter-spacing: 0.2px; margin: 0 0 22px; max-width: 16ch;
  }
  .hero-copy p.lead {
    font-size: 16.5px; color: var(--mist); max-width: 52ch; margin: 0 0 34px;
  }
  .hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }
  .btn {
    display: inline-flex; align-items: center; gap: 8px; text-decoration: none;
    font-size: 14.5px; font-weight: 600; padding: 13px 20px; border-radius: 3px;
    border: 1px solid var(--line);
  }
  .btn.primary { background: var(--safety); color: var(--ink); border-color: var(--safety); }
  .btn.primary:hover { background: #ff744d; }
  .btn.ghost { color: var(--paper); }
  .btn.ghost:hover { border-color: var(--paper); }

  .hero-art { position: relative; }
  .hero-art svg { width: 100%; height: auto; display: block; }
  .blueprint-line { fill: none; stroke: var(--paper); stroke-width: 1.4; opacity: 0.9; }
  .blueprint-line.dim { stroke: var(--mist); opacity: 0.6; }
  .blueprint-fill { fill: var(--steel-2); stroke: var(--paper); stroke-width: 1.2; }
  .blueprint-cut { fill: var(--ink); stroke: var(--mist); stroke-width: 1; }
  .blueprint-accent { stroke: var(--safety); }
  .callout-label { font-family: var(--font-body); font-size: 11px; fill: var(--mist); }
  .dim-label { font-family: var(--font-body); font-size: 11px; fill: var(--mist); }

  /* ---------- Sections generic ---------- */
  section { padding: 76px 0; border-top: 1px solid var(--line); }
  .section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 44px; flex-wrap: wrap; }
  .section-head h2 {
    font-family: var(--font-display); font-weight: 600; font-size: clamp(24px, 3vw, 32px);
    margin: 0; letter-spacing: 0.2px;
  }
  .section-head p { color: var(--mist); max-width: 46ch; margin: 8px 0 0; font-size: 14.5px; }

  /* ---------- Fabrication (avant/arrière) ---------- */
  .parts-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
  .part-panel { background: var(--ink); padding: 36px 34px 40px; }
  .part-panel svg { width: 100%; height: auto; margin-bottom: 26px; }
  .part-panel h3 { font-family: var(--font-display); font-weight: 600; font-size: 21px; margin: 0 0 4px; }
  .part-panel .sub { color: var(--mist); font-size: 13.5px; margin: 0 0 20px; }
  .spec-list { list-style: none; margin: 0; padding: 0; }
  .spec-list li {
    display: flex; justify-content: space-between; gap: 16px;
    padding: 11px 0; border-top: 1px solid var(--line); font-size: 14px;
  }
  .spec-list li:first-child { border-top: none; }
  .spec-list li span:first-child { color: var(--mist); }
  .spec-list li span:last-child { text-align: right; }

  /* ---------- Site / cadence ---------- */
  .site-block { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: start; }
  .site-block p { max-width: 56ch; color: var(--mist); margin: 0 0 16px; font-size: 15.5px; }
  .site-block p strong { color: var(--paper); font-weight: 600; }
  .rhythm-list { border-top: 1px solid var(--line); }
  .rhythm-list .row {
    display: flex; align-items: baseline; justify-content: space-between;
    padding: 20px 0; border-bottom: 1px solid var(--line);
  }
  .rhythm-list .row .num { font-family: var(--font-display); font-size: 30px; font-weight: 600; color: var(--safety); }
  .rhythm-list .row .lbl { color: var(--mist); font-size: 13.5px; max-width: 22ch; text-align: right; }

  /* ---------- Exigences ---------- */
  .req-list { border-top: 1px solid var(--line); }
  .req-row {
    display: grid; grid-template-columns: 40px 200px 1fr; gap: 22px; align-items: start;
    padding: 26px 0; border-bottom: 1px solid var(--line);
  }
  .req-row svg { width: 22px; height: 22px; stroke: var(--safety); }
  .req-row h4 { font-family: var(--font-display); font-weight: 600; font-size: 17px; margin: 2px 0 0; }
  .req-row p { margin: 0; color: var(--mist); font-size: 14.5px; max-width: 60ch; }

  /* ---------- Outils ---------- */
  .tool-block {
    display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: center;
    padding: 40px; background: var(--steel); border: 1px solid var(--line);
  }
  .tool-block h3 { font-family: var(--font-display); font-weight: 600; font-size: 22px; margin: 0 0 10px; }
  .tool-block p { color: var(--mist); margin: 0; max-width: 60ch; font-size: 14.5px; }
  .tool-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
  .tool-tags span {
    font-size: 12px; color: var(--mist); border: 1px solid var(--line);
    padding: 4px 10px; border-radius: 3px;
  }

  /* ---------- Footer ---------- */
  footer.site {
    border-top: 1px solid var(--line); padding: 44px 0 calc(44px + env(safe-area-inset-bottom, 0px));
  }
  .foot-grid { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
  .foot-grid .brand .word { font-size: 17px; }
  footer.site address { font-style: normal; color: var(--mist); font-size: 13.5px; line-height: 1.7; }
  footer.site .legal { color: var(--mist); font-size: 12.5px; margin-top: 30px; }

  /* ---------- Reveal (une seule séquence, au chargement) ---------- */
  .reveal { opacity: 0; transform: translateY(10px); }
  .reveal.in { opacity: 1; transform: none; transition: opacity .6s ease, transform .6s ease; }
  @media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; }
  }

  :focus-visible { outline: 2px solid var(--safety); outline-offset: 2px; }

  @media (max-width: 900px) {
    .hero { grid-template-columns: 1fr; padding-top: 48px; }
    .hero-art { order: -1; max-width: 420px; }
    .parts-grid { grid-template-columns: 1fr; }
    .site-block { grid-template-columns: 1fr; }
    .tool-block { grid-template-columns: 1fr; text-align: left; }
    .req-row { grid-template-columns: 30px 1fr; }
    .req-row .req-label { grid-column: 2; }
  }
  @media (max-width: 720px) {
    nav.site-nav { display: none; }
    .menu-btn { display: inline-flex; align-items: center; justify-content: center; }
    header.site.open nav.site-nav {
      display: flex; flex-direction: column; gap: 0; position: absolute; left: 0; right: 0; top: 100%;
      background: var(--ink); border-bottom: 1px solid var(--line); padding: 8px 28px 16px;
    }
    header.site.open nav.site-nav a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  }

  main.hero, .hero-ctas a{ text-decoration: none; }
  footer.site .foot-grid a, .brand span .word{ text-decoration: none; }