:root {
  --ink: #1f1714;
  --copper: #c3693a;
  --copper-hi: #dc8a57;
  --copper-text: #a5522a;
  --copper-press: #954a25;
  --cream: #f3eadf;
  --grey: #dcd9d5;
  --on-dark: #f2ebe3;
  --on-dark-muted: #b8ada4;
  --on-light: #2b211d;
  --on-light-muted: #5d514a;
  --rule-dark: #ffffff2e;
  --rule-light: #2b211d38;
  --paper: #fbf7f1;
  --field-line: #2b211d33;
  --error: #b42318;
  --font: "Montserrat", system-ui, sans-serif;
  --ease-soft-close: cubic-bezier(.16, 1, .3, 1);
  --gutter: clamp(16px, 5vw, 64px);
  --max: 1200px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-block-start: 72px; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--on-light);
  background: var(--ink);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body.is-intro { overflow: hidden; }
img { max-inline-size: 100%; display: block; }
a { color: inherit; }

/* ---------- Logo ---------- */
.logo-letter { fill: currentColor; }
.logo-a { fill: var(--copper); }

.brand { display: inline-flex; align-items: center; gap: 14px; text-decoration: none; color: var(--on-dark); }
.brand-mark { inline-size: 112px; block-size: auto; overflow: visible; }
.brand-tagline { padding-inline-start: 14px; border-inline-start: 1px solid var(--rule-dark); font-size: 11px; font-weight: 600; line-height: 1.35; letter-spacing: .14em; text-transform: uppercase; color: var(--on-dark-muted); white-space: nowrap; }
.brand:focus-visible { outline: 2px solid var(--copper-hi); outline-offset: 4px; }
/* Entre 900 et 1200 px, l'en-tête manque de place : la mention reste dans le pied de page seulement. */
@media (max-width: 1200px) { .site-header .brand-tagline { display: none; } }

/* ---------- Boutons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .9em; white-space: nowrap;
  padding-block: .95em; padding-inline: 1.6em;
  font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  text-decoration: none; border-radius: 3px;
  transition: background-color .25s, color .25s, border-color .25s, transform .25s var(--ease-soft-close);
}
.btn-arrow { font-size: 1.5em; line-height: 0; transition: transform .3s var(--ease-soft-close); }
.btn:hover .btn-arrow { transform: translateX(5px); }
.btn--solid { background: var(--copper-text); color: #fff; }
.btn--solid:hover { background: var(--copper-press); }
.btn--outline { border: 1px solid var(--copper); color: var(--on-dark); padding-block: .75em; padding-inline: 1.2em; font-size: 11.5px; }
.btn--outline:hover { background: var(--copper); }
.btn:focus-visible, .site-nav a:focus-visible { outline: 2px solid var(--copper-hi); outline-offset: 3px; }

/* ---------- En-tête ---------- */
.site-header {
  position: fixed; inset-block-start: 0; inset-inline: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding-block: 22px; padding-inline: var(--gutter);
  transition: background-color .35s, padding .35s, backdrop-filter .35s;
}
.site-header.is-scrolled { background: #1f1714e6; backdrop-filter: blur(10px); padding-block: 12px; }
.site-nav { display: flex; gap: clamp(20px, 3.5vw, 52px); }
.site-nav a {
  position: relative; font-size: 12px; font-weight: 500; letter-spacing: .14em; text-transform: uppercase; white-space: nowrap;
  color: var(--on-dark); text-decoration: none; padding-block: 6px;
}
.site-nav a::after {
  content: ""; position: absolute; inset-inline: 0; inset-block-end: 0; block-size: 1px;
  background: var(--copper); transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease-soft-close);
}
.site-nav a:hover::after { transform: scaleX(1); }

/* ---------- Titres de section ---------- */
.eyebrow {
  display: flex; align-items: center; justify-content: center; gap: 18px;
  margin: 0 0 16px; font-size: 12px; font-weight: 600; letter-spacing: .36em; text-transform: uppercase;
}
.eyebrow::before, .eyebrow::after { content: ""; inline-size: 48px; block-size: 1px; background: currentColor; opacity: .45; }
.eyebrow--left { justify-content: flex-start; }
.eyebrow--left::after { display: none; }
.section-title {
  margin: 0 0 14px; color: var(--copper);
  font-size: clamp(24px, 3.2vw, 38px); font-weight: 700; line-height: 1.12;
  font-variant-caps: small-caps; letter-spacing: .04em;
}
.section-lead { margin: 0 auto; max-inline-size: 64ch; font-size: clamp(16px, 1.3vw, 18px); line-height: 1.6; }

/* ---------- Hero ---------- */
.hero { position: relative; background: var(--ink); color: var(--on-dark); overflow: hidden; }
.hero-photo {
  position: absolute; inset-block-start: 0; inset-inline-end: 0;
  inline-size: min(68vw, 1180px); block-size: min(100vh, 860px);
  background: url("assets/hero.jpg") 78% 35% / cover no-repeat;
  -webkit-mask-image: linear-gradient(to right, #0000 0%, #0008 18%, #000 42%), linear-gradient(to top, transparent 0%, #000 30%);
  -webkit-mask-composite: source-in; mask-composite: intersect;
  mask-image: linear-gradient(to right, #0000 0%, #0008 18%, #000 42%), linear-gradient(to top, transparent 0%, #000 30%);
  opacity: .92; transform: scale(1.04); will-change: transform;
}
/* Assombrit le haut de la photo pour que le menu reste lisible devant les fenêtres */
.hero::before {
  content: ""; position: absolute; inset-block-start: 0; inset-inline: 0; block-size: 180px; z-index: 1; pointer-events: none;
  background: linear-gradient(to bottom, #1f1714e6, #1f171400);
}
.hero-inner {
  position: relative; z-index: 1;
  min-block-size: min(100vh, 860px);
  display: flex; flex-direction: column; justify-content: center; align-items: flex-start;
  padding-block: 140px 90px; padding-inline: var(--gutter);
  max-inline-size: calc(var(--max) + 2 * var(--gutter)); margin-inline: auto;
}
.hero-title { margin: 0; font-size: clamp(38px, 5.6vw, 76px); font-weight: 800; line-height: 1.04; text-transform: uppercase; letter-spacing: .01em; }
.hero-line { display: block; }
.hero-line--accent { color: var(--copper); }

/* La règle sous le titre : un ruban à mesurer qui se déroule */
.tape {
  display: block; margin-block: 26px 24px; inline-size: min(330px, 70%); block-size: 10px;
  background:
    repeating-linear-gradient(to right, #fff6 0 1px, transparent 1px 11px) left top / 100% 4px no-repeat,
    linear-gradient(var(--copper), var(--copper)) left bottom / 100% 4px no-repeat;
  transform-origin: left;
}
.hero-lead { margin: 0 0 30px; max-inline-size: 440px; font-size: clamp(15px, 1.35vw, 18px); line-height: 1.55; font-weight: 500; }

/* Entrée du hero après l'ouverture : position de départ ; Motion les fait monter (main.js, revealHero). */
[data-hero] { opacity: 0; transform: translateY(18px); }
.tape[data-hero] { transform: scaleX(0); opacity: 1; }

/* ---------- Notre solution ---------- */
.solution { position: relative; z-index: 1; text-align: center; padding-block: 30px 90px; padding-inline: var(--gutter); max-inline-size: calc(var(--max) + 2 * var(--gutter)); margin-inline: auto; }
.solution .eyebrow { color: var(--on-dark); }
.solution .section-lead { color: var(--on-dark); }
.pillars { list-style: none; margin: 46px 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.pillars h3 { margin: 12px 0 8px; font-size: 18px; font-weight: 700; font-variant-caps: small-caps; letter-spacing: .08em; }
.pillars p { margin: 0 auto; max-inline-size: 28ch; font-size: 15px; line-height: 1.55; color: var(--on-dark-muted); }

.icon { inline-size: 40px; block-size: 40px; fill: none; stroke: var(--copper); stroke-width: 1.3; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- Processus ---------- */
.process { background: var(--grey); text-align: center; padding-block: 90px 100px; padding-inline: var(--gutter); }
.process .eyebrow { color: var(--on-light); }
/* La vidéo de SAM, au format 16:9 : le poster occupe la place avant le chargement, sans décalage de mise en page */
.film { position: relative; margin-block: 56px 0; margin-inline: auto; max-inline-size: 1040px; border-radius: 10px; overflow: hidden; background: var(--ink); box-shadow: 0 30px 70px #2b211d40, 0 6px 16px #2b211d26; }
.film-video { display: block; inline-size: 100%; aspect-ratio: 16 / 9; object-fit: cover; background: var(--ink); }
.film-toggle {
  position: absolute; inset-block-end: 14px; inset-inline-end: 14px; display: grid; place-items: center;
  inline-size: 44px; block-size: 44px; padding: 0; border: 0; border-radius: 50%; background: #1f1714b3; color: var(--on-dark);
  cursor: pointer; backdrop-filter: blur(6px); transition: background-color .2s, transform .2s var(--ease-soft-close);
}
.film-toggle:hover { background: var(--copper); transform: scale(1.06); }
.film-toggle:focus-visible { outline: 2px solid var(--copper-hi); outline-offset: 3px; }
.film.is-mobile .film-video { aspect-ratio: 4 / 5; }
.film-icon { inline-size: 18px; block-size: 18px; fill: currentColor; }
.film.is-playing .film-icon--play, .film:not(.is-playing) .film-icon--pause { display: none; }

/* ---------- Modules ---------- */
.modules { background: var(--cream); text-align: center; padding-block: 90px 100px; padding-inline: var(--gutter); }
.modules .eyebrow { color: var(--on-light); }
.module-list { list-style: none; margin: 56px auto 0; padding: 0; max-inline-size: var(--max); display: grid; grid-template-columns: repeat(3, 1fr); text-align: start; }
.module { position: relative; padding-block: 8px; padding-inline: 36px; border-inline-start: 1px solid var(--rule-light); }
.module:first-child { border-inline-start: 0; padding-inline-start: 0; }
.module .icon { inline-size: 44px; block-size: 44px; margin-block-end: 18px; transition: transform .4s var(--ease-soft-close); }
.module:hover .icon { transform: translateY(-4px) rotate(-4deg); }
.module h3 { margin: 0 0 8px; font-size: 17px; font-weight: 800; text-transform: uppercase; letter-spacing: .02em; }
.module-tags { margin: 0 0 14px; font-size: 12px; font-weight: 700; letter-spacing: .03em; text-transform: uppercase; color: var(--copper-text); }
.module p:last-child { margin: 0; font-size: 16px; line-height: 1.6; color: var(--on-light-muted); max-inline-size: 32ch; }

/* ---------- Accompagnement ---------- */
.support { display: grid; grid-template-columns: 44% 1fr; background: var(--ink); color: var(--on-dark); }
.support-photo { min-block-size: 440px; background: url("assets/accompagnement.jpg") 62% center / cover no-repeat; }
.support-body { display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding-block: 70px; padding-inline: clamp(24px, 6vw, 80px); }
.support-body .eyebrow { color: var(--on-dark); }
.support-body .section-title { max-inline-size: 520px; }
.support-body p { margin: 0; max-inline-size: 52ch; font-size: 16.5px; line-height: 1.7; color: var(--on-dark); }
.support-rule { display: block; margin-block: 28px; inline-size: 40px; block-size: 1px; background: var(--rule-dark); }
.values { font-size: 15px !important; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--copper) !important; }
.values span { margin-inline: .6em; }

/* ---------- Appel à l'action ---------- */
.cta {
  background: var(--cream); display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 560px); align-items: center; gap: clamp(32px, 6vw, 88px);
  padding-block: 96px; padding-inline: max(var(--gutter), calc((100vw - var(--max)) / 2));
}
.cta .eyebrow { color: var(--on-light); }
.process .section-title, .modules .section-title, .cta .section-title { color: var(--copper-text); }
.cta .section-title { font-size: clamp(26px, 3.4vw, 42px); }
.cta-text p:last-child { margin: 0; max-inline-size: 44ch; font-size: 16.5px; line-height: 1.65; color: var(--on-light-muted); }

/* ---------- Demande de démo ---------- */
@media (max-width: 1100px) { .cta { grid-template-columns: 1fr; } .demo-card { max-inline-size: 640px; } }
.demo-card { background: var(--paper); border-radius: 6px; padding: clamp(22px, 3vw, 36px); box-shadow: 0 1px 0 var(--rule-light), 0 24px 60px #2b211d1f; }
.demo-form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 20px; }
.demo-form[hidden] { display: none; }
.field { display: flex; flex-direction: column; gap: 7px; min-inline-size: 0; margin: 0; padding: 0; border: 0; }
.field--wide { grid-column: 1 / -1; }
.field label, .field legend { padding: 0; font-size: 12px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--on-light-muted); }
.field legend { margin-block-end: 10px; font-size: 15px; font-weight: 500; letter-spacing: 0; text-transform: none; line-height: 1.5; color: var(--on-light); }
.demo-card abbr { color: var(--copper-text); text-decoration: none; }
.field input, .field select, .field textarea {
  inline-size: 100%; padding-block: .78em; padding-inline: .9em; border: 1px solid var(--field-line); border-radius: 3px;
  background: #fff; color: var(--on-light); font: 500 16px/1.4 var(--font); transition: border-color .2s, box-shadow .2s;
}
.field textarea { resize: vertical; min-block-size: 84px; }
.field textarea::placeholder { color: #2b211d73; }
.field select {
  appearance: none; padding-inline-end: 2.4em; cursor: pointer;
  background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23c3693a' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m2 4 4 4 4-4'/%3E%3C/svg%3E") no-repeat right .9em center;
}
.field input:hover, .field select:hover, .field textarea:hover { border-color: #2b211d66; }
.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible { outline: none; border-color: var(--copper); box-shadow: 0 0 0 3px #c3693a2e; }
.field.is-invalid input, .field.is-invalid select, .field.is-invalid textarea { border-color: var(--error); }
.field-error { margin: 0; font-size: 13.5px; font-weight: 500; color: var(--error); }
.field-error:empty { display: none; }
.choices { display: flex; flex-wrap: wrap; gap: 8px; }
.field .choice {
  display: inline-flex; align-items: center; gap: .55em; padding-block: .55em; padding-inline: .8em 1em; border: 1px solid var(--field-line); border-radius: 999px;
  background: #fff; font-size: 14.5px; font-weight: 500; letter-spacing: 0; text-transform: none; color: var(--on-light); cursor: pointer; transition: border-color .2s, background-color .2s;
}
.field .choice:hover { border-color: #2b211d66; }
.choice:has(input:checked) { border-color: var(--copper); background: #c3693a14; }
.choice:has(input:focus-visible) { box-shadow: 0 0 0 3px #c3693a2e; }
.field .choice input { inline-size: auto; margin: 0; padding: 0; accent-color: var(--copper); }
.consent.is-invalid .choice { border-color: var(--error); }
.form-foot { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-block-start: 4px; }
.form-note { margin: 0; font-size: 13px; color: var(--on-light-muted); }
.form-foot .btn:disabled { opacity: .6; cursor: progress; }
.demo-sent { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; padding-block: 40px; text-align: center; }
.demo-sent[hidden] { display: none; }
.demo-sent:focus { outline: none; }
.sent-mark { position: relative; inline-size: 92px; margin-block-end: 14px; }
.sent-mark svg { display: block; inline-size: 100%; overflow: visible; }
.sent-mark use { transform-box: fill-box; }
.sent-a { fill: var(--copper); }
.sent-base { fill: var(--on-light); }
.sent-chip { position: absolute; inset-block-end: 6px; inset-inline-start: 46%; inline-size: 9px; block-size: 4px; border-radius: 4px 4px 1px 1px; pointer-events: none; }
.demo-sent p { margin: 0; max-inline-size: 36ch; font-size: 16px; line-height: 1.6; color: var(--on-light-muted); }
.demo-sent .demo-sent-title { font-size: clamp(22px, 2.6vw, 28px); font-weight: 700; font-variant-caps: small-caps; letter-spacing: .03em; color: var(--copper); }
.demo-sink { position: absolute; inline-size: 0; block-size: 0; border: 0; visibility: hidden; }
.choice b { font-weight: 700; color: var(--copper-text); }

/* ---------- Pied de page ---------- */
.site-footer {
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  padding-block: 36px; padding-inline: var(--gutter); background: var(--ink); color: var(--on-dark);
}
.footer-slogan { margin: 0; font-size: 14px; font-weight: 800; text-transform: uppercase; letter-spacing: .02em; }
.footer-slogan span { color: var(--copper); }

/* ---------- Ouverture ---------- */
.intro { position: fixed; inset: 0; z-index: 100; perspective: 1800px; pointer-events: auto; }
.intro.is-done { display: none; }
.intro-door {
  position: absolute; inset-block: 0; inline-size: 50.2%;
  background:
    linear-gradient(90deg, #0000 0 calc(100% - 1px), #0006 calc(100% - 1px)),
    repeating-linear-gradient(90deg, #ffffff05 0 2px, transparent 2px 7px, #00000010 7px 9px, transparent 9px 17px),
    var(--ink);
  box-shadow: inset 0 0 0 14px #ffffff06, inset 0 0 0 15px #00000033;
  transition: transform 1.05s cubic-bezier(.65, 0, .25, 1), filter 1.05s ease;
}
.intro-door--left { inset-inline-start: 0; transform-origin: left center; }
.intro-door--right { inset-inline-end: 0; transform-origin: right center; }
.intro-door--right .intro-handle { inset-inline-end: auto; inset-inline-start: 34px; }
.intro-handle {
  position: absolute; inset-block-start: calc(50% - 46px); inset-inline-end: 34px;
  inline-size: 4px; block-size: 92px; border-radius: 2px; background: linear-gradient(90deg, var(--copper-hi), var(--copper) 60%, #8a4522);
  opacity: 0; transition: opacity .6s;
}
.intro.is-opening .intro-handle { opacity: .9; transition-duration: .2s; }
.intro-tagline:not(.is-writing) { visibility: hidden; }
.site-header { transition: background-color .35s, padding .35s, backdrop-filter .35s, opacity .6s; }
body.is-intro .site-header { opacity: 0; }
.intro.is-opening .intro-door--left { transform: rotateY(-100deg); filter: brightness(.5); }
.intro.is-opening .intro-door--right { transform: rotateY(100deg); filter: brightness(.5); }
body.is-landing .site-header .brand-mark { opacity: 0; }
.intro-dust { position: absolute; inset: 0; inline-size: 100%; block-size: 100%; pointer-events: none; }
.intro-stage {
  position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 22px;
  color: var(--on-dark); pointer-events: none;
}
.intro-logo { inline-size: min(68vw, 460px); block-size: auto; overflow: visible; }
.intro-part, .fx-piece { transform-box: fill-box; transform-origin: center; }
.intro-part { opacity: 0; }
.fx-kerf { fill: none; stroke: var(--copper-hi); stroke-width: 1.6; stroke-dasharray: 1; stroke-dashoffset: 1; filter: drop-shadow(0 0 3px #ff9a55); }
.fx-kerf-line { stroke: #3b2214; stroke-width: 1.6; filter: drop-shadow(0 0 2px #ff9a55); }
.fx-hot { filter: drop-shadow(0 0 3px #ffb36b) drop-shadow(0 0 9px #c3693a); }
.fx-bit { opacity: 0; }
.fx-bit-body { fill: #cfcac4; stroke: #6f6a64; stroke-width: 1; }
.fx-bit-flute { fill: #8b857e; }
.fx-bit-hub { fill: var(--copper); }
.fx-grid { stroke: var(--on-dark); stroke-opacity: .08; stroke-width: .4; }
.fx-outline { fill: none; stroke: var(--on-dark); stroke-width: .7; stroke-dasharray: 1; stroke-dashoffset: 1; }
.fx-cotes { fill: none; stroke: var(--copper-hi); stroke-width: .6; }
.fx-cotes .fx-axis { stroke-dasharray: 5 3; stroke-opacity: .6; }
.fx-cotes text { fill: var(--copper-hi); stroke: none; font: 600 7px var(--font); letter-spacing: .12em; }
.fx-spray { stroke: var(--copper-hi); stroke-width: 1.2; filter: drop-shadow(0 0 4px #ff9a55); }
.intro-tagline { margin: 0; font-size: clamp(9px, 1.4vw, 12px); font-weight: 600; letter-spacing: .32em; text-transform: uppercase; color: var(--on-dark-muted); }
.intro-tagline span { opacity: 0; }
.intro-skip {
  position: absolute; inset-block-end: 26px; inset-inline-end: 28px;
  background: none; border: 0; color: var(--on-dark-muted); font: 600 11px var(--font); letter-spacing: .2em; text-transform: uppercase; cursor: pointer;
  padding: 8px; transition: color .2s, opacity .3s;
}
.intro-skip:hover { color: var(--on-dark); }
.intro.is-opening .intro-skip { opacity: 0; }

/* ---------- Petits écrans ---------- */
@media (max-width: 900px) {
  .site-nav { display: none; }
  .pillars { grid-template-columns: repeat(2, 1fr); row-gap: 40px; }
  .module-list { grid-template-columns: 1fr; gap: 36px; text-align: center; }
  .module, .module:first-child { border: 0; padding-inline: 0; }
  .module p:last-child { margin-inline: auto; }
  .support { grid-template-columns: 1fr; }
  .support-photo { min-block-size: 280px; }
  .film { margin-block-start: 36px; border-radius: 6px; }
  .film-toggle { inline-size: 36px; block-size: 36px; inset-block-end: 8px; inset-inline-end: 8px; }
  .cta { grid-template-columns: 1fr; padding-block: 64px; }
  .demo-form { grid-template-columns: 1fr; gap: 16px; }
  .form-foot .btn { inline-size: 100%; justify-content: center; }
  .hero-photo { inline-size: 100%; block-size: 88vh; opacity: .4; background-position: 62% center;
    -webkit-mask-image: linear-gradient(to top, transparent 0%, #000 40%); mask-image: linear-gradient(to top, transparent 0%, #000 40%); }
  .hero-inner { min-block-size: 88vh; }
}
@media (max-width: 560px) {
  .site-header .btn--outline { padding-inline: .9em; font-size: 11px; }
  .brand-mark { inline-size: 88px; }
  .brand-tagline { display: none; }
  .pillars { grid-template-columns: 1fr; }
  .eyebrow { letter-spacing: .28em; gap: 12px; }
  .eyebrow::before, .eyebrow::after { inline-size: 28px; }
  .values span { margin-inline: .3em; }
  .values { font-size: 13px !important; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-hero] { opacity: 1 !important; transform: none !important; transition: none !important; animation: none !important; }
}