/* CFI : bureau d'études et prototypage industriel. Feuille unique, sans framework. */
:root {
  --bg: #f4f5f2;
  --paper: #ffffff;
  --ink: #16212b;
  --muted: #4a5561;
  --line: #d5d9d3;
  --grid: rgba(22, 33, 43, .055);
  --accent: #b6400a;
  --accent-ink: #ffffff;
  --accent-soft: #fbe9df;
  --steel: #2a4a63;
  --header: #16212b;
  --header-ink: #eef1ec;
  --focus: #1b6fd1;
  --radius: 4px;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, "Liberation Mono", Menlo, monospace;
  --wrap: 72rem;
  --gutter: 16px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f151b;
    --paper: #161e26;
    --ink: #e6e9e4;
    --muted: #a9b2ba;
    --line: #2c3742;
    --grid: rgba(230, 233, 228, .045);
    --accent: #f08a4b;
    --accent-ink: #14100d;
    --accent-soft: #2d1f17;
    --steel: #8fb4d1;
    --header: #0a0f14;
    --header-ink: #e6e9e4;
    --focus: #7cb6ff;
  }
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  font: 1.0625rem/1.65 var(--sans);
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-underline-offset: .18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 2px; }
.skip {
  position: absolute; left: var(--gutter); top: -100px; z-index: 10;
  background: var(--paper); color: var(--ink); padding: .6rem 1rem; border: 2px solid var(--focus);
}
.skip:focus { top: var(--gutter); }
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

/* En-tête */
.site-header { background: var(--header); color: var(--header-ink); border-bottom: 4px solid var(--accent); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .75rem 1.5rem; padding-top: .9rem; padding-bottom: .9rem; }
.brand { display: flex; align-items: center; gap: .7rem; color: inherit; text-decoration: none; }
.brand-mark {
  display: inline-grid; place-items: center; width: 2.6rem; height: 2.6rem;
  border: 2px solid var(--accent); font: 700 1rem/1 var(--mono); letter-spacing: .04em; color: var(--header-ink);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 1.15rem; letter-spacing: .02em; }
.brand-text span { font: .75rem/1.3 var(--mono); opacity: .8; text-transform: uppercase; letter-spacing: .08em; }
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: .25rem; }
.site-nav a {
  display: block; padding: .4rem .7rem; color: var(--header-ink); text-decoration: none;
  font-size: .95rem; border-radius: var(--radius);
}
.site-nav a:hover { background: rgba(255,255,255,.08); }
.site-nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--accent); }

/* Fil d'Ariane */
.crumbs { font: .8rem/1.4 var(--mono); color: var(--muted); padding-top: 1.25rem; }
.crumbs ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: .3rem; }
.crumbs li + li::before { content: "/"; margin-right: .3rem; color: var(--line); }
.crumbs a { color: var(--muted); }

/* Contenu */
main { padding-bottom: 3rem; }
.page-head { padding: 1.5rem 0 1rem; }
.eyebrow { font: 600 .78rem/1.3 var(--mono); text-transform: uppercase; letter-spacing: .12em; color: var(--accent); margin: 0 0 .5rem; }
h1 { font-size: clamp(1.75rem, 1.2rem + 2.4vw, 2.75rem); line-height: 1.15; margin: 0; letter-spacing: -.01em; overflow-wrap: anywhere; }
.lead { color: var(--muted); font-size: 1.1rem; max-width: 46rem; margin: .8rem 0 0; }
.sheet {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(1.1rem, 3vw, 2.5rem); position: relative;
}
.sheet::before {
  content: ""; position: absolute; top: -1px; left: -1px; width: 3rem; height: 3rem;
  border-top: 3px solid var(--accent); border-left: 3px solid var(--accent); pointer-events: none;
}
.prose { max-width: 46rem; }
.prose > :first-child { margin-top: 0; }
.prose h2 { font-size: 1.4rem; line-height: 1.25; margin: 2rem 0 .6rem; padding-top: .8rem; border-top: 1px dashed var(--line); }
.prose h3 { font-size: 1.15rem; margin: 1.5rem 0 .4rem; color: var(--steel); }
.prose p { margin: 0 0 1rem; }
.prose ul, .prose ol { padding-left: 1.3rem; margin: 0 0 1rem; }
.prose li { margin: .25rem 0; }
.prose ul li::marker { color: var(--accent); }
.prose table { border-collapse: collapse; width: 100%; margin: 0 0 1rem; font-size: .95rem; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: .45rem .6rem; text-align: left; vertical-align: top; }
.prose th { background: var(--accent-soft); }
.prose a { overflow-wrap: anywhere; }
.meta { font: .85rem/1.4 var(--mono); color: var(--muted); margin: 0 0 1rem; }

/* Images */
.figs { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 15rem), 1fr)); gap: 1rem; margin: 1.5rem 0; }
figure { margin: 0 0 1rem; }
.figs figure { margin: 0; }
figure img { border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg); }
.prose figure.wide img { width: 100%; }
figcaption { font-size: .85rem; color: var(--muted); margin-top: .35rem; }
.ph {
  display: grid; place-items: center; aspect-ratio: 4 / 3; border: 1px dashed var(--muted);
  border-radius: var(--radius); color: var(--muted); font: .85rem var(--mono); text-align: center; padding: 1rem;
  background: repeating-linear-gradient(45deg, transparent 0 10px, var(--grid) 10px 20px);
}

/* Cartes de liens (sous-pages) */
.cards { list-style: none; padding: 0; margin: 1.5rem 0; display: grid; gap: .75rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 16rem), 1fr)); }
.cards a {
  display: block; height: 100%; padding: .9rem 1rem; background: var(--paper); border: 1px solid var(--line);
  border-left: 3px solid var(--accent); border-radius: var(--radius); color: var(--ink); text-decoration: none; font-weight: 600;
}
.cards a:hover { border-color: var(--accent); }
.cards span { display: block; font: 400 .78rem/1.4 var(--mono); color: var(--muted); margin-top: .2rem; }

/* Bloc coordonnées */
.contact-box { margin-top: 2rem; padding: 1.1rem 1.25rem; background: var(--accent-soft); border-radius: var(--radius); border: 1px solid var(--line); }
.contact-box h2 { margin: 0 0 .5rem; font-size: 1.1rem; border: 0; padding: 0; }
.contact-box p { margin: .2rem 0; }

/* Pied de page */
.site-footer { background: var(--header); color: var(--header-ink); padding: 2rem 0 1.5rem; font-size: .92rem; }
.site-footer a { color: var(--header-ink); }
.foot-grid { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr)); }
.site-footer h2 { font: 600 .78rem/1.3 var(--mono); text-transform: uppercase; letter-spacing: .12em; color: var(--accent); margin: 0 0 .6rem; }
@media (prefers-color-scheme: light) { .site-footer h2 { color: #f39a63; } }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin: .2rem 0; }
.site-footer address { font-style: normal; }
.legal { border-top: 1px solid rgba(255,255,255,.15); margin-top: 1.5rem; padding-top: 1rem; font: .78rem/1.5 var(--mono); opacity: .85; }

@media (max-width: 40rem) {
  body { font-size: 1rem; }
  .site-nav { width: 100%; }
  .site-nav ul { gap: 0; }
  .site-nav a { padding: .45rem .55rem; font-size: .9rem; }
}
@media print {
  body { background: #fff; color: #000; }
  .site-header, .site-footer, .skip, .crumbs { display: none; }
  .sheet { border: 0; padding: 0; }
}