/* Cinqtreize — site public : encre sur blanc, gris pour la hiérarchie, aucune couleur d'accent.
   Police système (aucune requête vers un tiers). */
:root {
  --ink: #0a0a0a; --paper: #ffffff; --soft: #f5f5f5; --line: #e5e5e5; --muted: #6b6b6b; --focus: #0a0a0a;
  font-family: ui-sans-serif, -apple-system, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light dark; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --ink: #fafafa; --paper: #0a0a0a; --soft: #171717; --line: #262626; --muted: #a3a3a3; --focus: #fafafa; }
}
:root[data-theme="dark"] { --ink: #fafafa; --paper: #0a0a0a; --soft: #171717; --line: #262626; --muted: #a3a3a3; --focus: #fafafa; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); line-height: 1.6; font-size: 17px; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--ink); text-decoration-color: var(--line); text-underline-offset: .22em; text-decoration-thickness: 1px; }
a:hover { text-decoration-color: var(--ink); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .88em; }
.skip { position: absolute; left: -999px; } .skip:focus { left: 16px; top: 8px; background: var(--paper); padding: .4rem .8rem; z-index: 10; }

/* — structure — */
header.site { display: flex; flex-wrap: wrap; gap: .75rem 2rem; justify-content: space-between; align-items: center;
  max-width: 1080px; margin: 0 auto; padding: 1.5rem 24px; }
.logo { display: inline-flex; gap: .6rem; align-items: center; font-weight: 600; font-size: 1.05rem; color: var(--ink); text-decoration: none; letter-spacing: -.01em; }
.mark { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--ink); color: var(--paper); border-radius: 6px; padding: .08rem .45rem; font-size: .85rem; font-weight: 600; }
nav { display: flex; flex-wrap: wrap; gap: .5rem 1.75rem; align-items: center; }
nav a { color: var(--muted); text-decoration: none; font-size: .95rem; }
nav a:hover { color: var(--ink); }
nav a[aria-current="page"] { color: var(--ink); }
nav a.btn { color: var(--paper); }
main { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
section { padding: 5rem 0; border-top: 1px solid var(--line); }
section.hero { border-top: 0; padding-top: 3rem; }
footer.site { max-width: 1080px; margin: 0 auto; padding: 2.5rem 24px 4rem; color: var(--muted); font-size: .85rem; border-top: 1px solid var(--line); }
footer.site a { color: var(--muted); } footer.site a:hover { color: var(--ink); }
footer.site p { max-width: 80ch; }

/* — typographie — */
h1 { font-size: clamp(2.4rem, 6.5vw, 4.4rem); line-height: 1.04; margin: 0 0 1.5rem; letter-spacing: -.04em; font-weight: 650; max-width: 16ch; }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); line-height: 1.15; margin: 0 0 1.5rem; letter-spacing: -.03em; font-weight: 650; max-width: 24ch; }
h3 { font-size: 1.05rem; margin: 0 0 .4rem; font-weight: 600; letter-spacing: -.01em; }
p { max-width: 64ch; }
.lead { font-size: 1.25rem; line-height: 1.5; color: var(--muted); max-width: 52ch; }
.micro { color: var(--muted); font-size: .9rem; }
.eyebrow { color: var(--muted); font-size: .95rem; margin: 0 0 1rem; }

/* — boutons — */
.cta-row { display: flex; flex-wrap: wrap; gap: .75rem; margin: 2rem 0 1rem; }
.btn { display: inline-block; background: var(--ink); color: var(--paper); text-decoration: none; border: 1px solid var(--ink);
  border-radius: 8px; padding: .8rem 1.4rem; font: inherit; font-size: .98rem; font-weight: 550; cursor: pointer; transition: opacity .12s; }
.btn:hover { opacity: .85; }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.small { padding: .4rem .9rem; font-size: .9rem; }
.btn:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }

/* — accueil — */
.hero-shot { margin: 3.5rem 0 0; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--soft); }
.hero-shot figcaption, .shots figcaption, .demo-fallback figcaption { padding: .7rem 1rem; color: var(--muted); font-size: .85rem; border-top: 1px solid var(--line); }
.cols { display: grid; grid-template-columns: 1.4fr 1fr; gap: 3rem; align-items: start; }
.today { padding-left: 2rem; border-left: 1px solid var(--line); color: var(--muted); }
.today ul { margin: .5rem 0 0; padding-left: 1.1rem; }
.benefits { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3rem; }
.benefits article p { color: var(--muted); }
.demo-frame { border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--soft); margin-top: 1.5rem; }
.demo-frame iframe { width: 100%; height: 720px; border: 0; display: block; }
.demo-frame iframe[hidden] { display: none; }
.demo-fallback { margin: 0; }
.shots { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-top: 1.5rem; }
.shots figure { margin: 0; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--soft); }
.steps { counter-reset: s; list-style: none; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; margin: 2rem 0; }
.steps li { counter-increment: s; color: var(--muted); }
.steps li::before { content: counter(s); display: block; font-size: 2.4rem; letter-spacing: -.04em; font-weight: 600; color: var(--ink); margin-bottom: .5rem; }
.steps li strong { color: var(--ink); font-weight: 600; }
.details { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem 3rem; margin-top: 3rem; }
.details p { color: var(--muted); }
.price-teaser, .plan { border: 1px solid var(--line); border-radius: 12px; padding: 2rem; }
.price { margin: .2rem 0; color: var(--muted); } .price span { font-size: 3rem; letter-spacing: -.04em; font-weight: 650; color: var(--ink); }
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; margin: 2rem 0; }
.plan { display: flex; flex-direction: column; }
.plan.featured { border-color: var(--ink); }
.plan ul { padding-left: 1.1rem; margin: .75rem 0 1.5rem; flex: 1; color: var(--muted); }
.for { color: var(--muted); margin: 0; }
.offer { background: var(--soft); border-left: 2px solid var(--ink); padding: 1rem 1.25rem; border-radius: 0 8px 8px 0; }
.badge { display: inline-block; margin: 0 0 .75rem; padding: .1rem .7rem; border-radius: 999px; border: 1px solid var(--ink); font-size: .8rem; }
details { border-bottom: 1px solid var(--line); padding: .2rem 0; }
summary { cursor: pointer; font-weight: 550; padding: 1rem 0; list-style: none; display: flex; justify-content: space-between; gap: 1rem; }
summary::after { content: "+"; color: var(--muted); font-weight: 400; font-size: 1.3rem; line-height: 1; }
details[open] summary::after { content: "–"; }
summary::-webkit-details-marker { display: none; }
details p { color: var(--muted); padding-bottom: 1rem; }

/* — formulaire — */
.signup { border-bottom: 0; }
.waitlist { display: grid; gap: 1.1rem; max-width: 520px; margin-top: 1.5rem; }
.waitlist label { display: grid; gap: .35rem; font-weight: 550; font-size: .95rem; }
.waitlist label.consent { display: flex; gap: .7rem; align-items: flex-start; font-weight: 400; font-size: .88rem; color: var(--muted); }
.waitlist input[type=checkbox] { accent-color: var(--ink); margin-top: .3rem; }
.waitlist input[type=email], .waitlist input[type=text], .waitlist select { padding: .8rem .9rem; border: 1px solid var(--line); border-radius: 8px;
  background: var(--paper); color: var(--ink); font: inherit; width: 100%; transition: border-color .12s; }
.waitlist input:hover, .waitlist select:hover { border-color: var(--muted); }
.waitlist input:focus, .waitlist select:focus { border-color: var(--ink); }
.form-status { min-height: 1.5em; margin: 0; font-weight: 550; }

/* — pages internes : méthode, prix, documents — */
.page-head { padding-bottom: 2rem; }
.page-head h1 { max-width: 20ch; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.methode, .legal-doc { max-width: 72ch; }
.methode h2, .legal-doc h2 { margin-top: 3rem; max-width: none; font-size: 1.5rem; }
.methode h3 { margin-top: 1.75rem; }
.methode-status, .a-valider, blockquote { border-left: 2px solid var(--ink); background: var(--soft); padding: .8rem 1.25rem; border-radius: 0 8px 8px 0; margin: 1.5rem 0; }
.methode-toc { display: block; background: var(--soft); border-radius: 10px; padding: .6rem 1.5rem; margin: 1.5rem 0; }
.methode-toc ol { padding-left: 1.2rem; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; margin: 1rem 0 1.75rem; font-size: .95rem; }
th, td { padding: .7rem .8rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--muted); font-weight: 500; font-size: .85rem; border-bottom-color: var(--ink); }
.legal-doc { padding: 2rem 0 3rem; }

@media (max-width: 860px) {
  section { padding: 3.5rem 0; }
  .cols, .shots, .details, .plans, .benefits { grid-template-columns: 1fr; gap: 2rem; }
  .today { padding-left: 0; border-left: 0; }
  .steps { grid-template-columns: 1fr 1fr; }
  .demo-frame iframe { height: 560px; }
}
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } body { font-size: 16px; } .btn { width: 100%; text-align: center; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }