:root {
  --ink: #17324d;
  --muted: #617285;
  --line: #dbe4ea;
  --paper: #ffffff;
  --wash: #f5f8fa;
  --accent: #2871a8;
  --accent-soft: #eaf3f8;
  --green: #4f8d45;
  --max: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.65; }
.site-header { max-width: var(--max); margin: 0 auto; padding: 28px 28px 18px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand img { width: min(330px, 58vw); display: block; }
.mouette { width: 74px; max-height: 74px; object-fit: contain; }
main { max-width: var(--max); margin: 0 auto; padding: 0 28px 72px; }
.hero { padding: 88px 0 66px; max-width: 850px; }
.eyebrow { margin: 0 0 12px; color: var(--green); font-size: .82rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(3rem, 5vw, 6.8rem); line-height: .95; letter-spacing: -.055em; }
.lead { margin: 28px 0 10px; max-width: 780px; font-size: clamp(1.25rem, 2.4vw, 2rem); line-height: 1.35; color: #304e68; }
.updated { color: var(--muted); font-size: .92rem; }
.milestones { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); border-radius: 18px; overflow: hidden; margin-bottom: 76px; }
.milestones article { min-height: 145px; padding: 25px; background: var(--wash); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.milestones article:nth-child(3n) { border-right: 0; }
.milestones article:nth-last-child(-n+3) { border-bottom: 0; }
.milestones span { display: inline-grid; place-items: center; width: 30px; height: 30px; margin-bottom: 12px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-weight: 900; }
.milestones strong, .milestones small { display: block; }
.milestones small { margin-top: 5px; color: var(--muted); line-height: 1.4; }
.section { padding: 54px 0; border-top: 1px solid var(--line); }
.section-heading { display: flex; align-items: baseline; gap: 16px; margin-bottom: 20px; }
.section-heading span { color: var(--accent); font-weight: 900; font-variant-numeric: tabular-nums; }
h2 { margin: 0; font-size: clamp(1.7rem, 3vw, 2.5rem); letter-spacing: -.025em; line-height: 1.15; }
.section > p, .split > div > p { max-width: 900px; font-size: 1.08rem; color: #40566b; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.tags span { padding: 6px 12px; border: 1px solid #cbdce7; border-radius: 999px; color: #426783; background: #fbfdfe; font-size: .88rem; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; }
.flow { list-style: none; padding: 0; margin: 26px 0 0; counter-reset: flow; }
.flow li { position: relative; padding: 0 0 24px 40px; border-left: 1px solid #cbdce7; margin-left: 11px; }
.flow li:last-child { border-left-color: transparent; padding-bottom: 0; }
.flow li::before { counter-increment: flow; content: counter(flow); position: absolute; left: -12px; top: 0; width: 23px; height: 23px; display: grid; place-items: center; border-radius: 50%; background: var(--paper); border: 1px solid var(--accent); color: var(--accent); font-size: .72rem; font-weight: 800; }
.flow b, .flow em { display: block; }
.flow em { color: var(--muted); font-style: normal; font-size: .93rem; }
.architecture { margin: 32px 0; display: grid; grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr; gap: 12px; align-items: center; }
.node { padding: 20px 14px; text-align: center; border: 1px solid var(--line); border-radius: 14px; background: var(--wash); font-weight: 800; }
.node small { color: var(--muted); font-weight: 500; }
.node.primary { border-color: #9bc3dd; background: var(--accent-soft); }
.node.upstream { background: #f7faf5; border-color: #ceddc9; }
.arrow { color: #8aa0b1; font-size: 1.5rem; }
.callout { align-self: center; padding: 30px; border-left: 4px solid var(--green); background: #f6faf5; border-radius: 0 14px 14px 0; }
.callout strong { color: var(--green); text-transform: uppercase; letter-spacing: .08em; font-size: .82rem; }
.callout p { margin-bottom: 0; font-size: 1.2rem; line-height: 1.45; }
.next { background: var(--wash); margin: 28px -28px 0; padding: 54px 28px; border-radius: 18px; border-top: 0; }
.checklist { list-style: none; padding: 0; margin: 28px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 14px 32px; }
.checklist li { position: relative; padding-left: 30px; }
.checklist li::before { content: "□"; position: absolute; left: 0; top: -2px; color: var(--accent); font-size: 1.25rem; }
.closing { margin-top: 72px; padding: 36px 0; display: grid; grid-template-columns: 90px 1fr; gap: 28px; align-items: center; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.closing img { width: 86px; max-height: 86px; }
.closing strong { font-size: 1.45rem; }
.closing p { margin: 6px 0 0; color: var(--muted); max-width: 760px; }
footer { max-width: var(--max); margin: 0 auto; padding: 36px 28px 56px; display: flex; align-items: center; gap: 30px; color: var(--muted); font-size: .88rem; }
footer img { width: 180px; }
footer p { margin: 0; }
@media (max-width: 800px) {
  .hero { padding: 60px 0 48px; }
  .milestones { grid-template-columns: 1fr 1fr; }
  .milestones article, .milestones article:nth-child(3n), .milestones article:nth-last-child(-n+3) { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .milestones article:nth-child(2n) { border-right: 0; }
  .milestones article:nth-last-child(-n+2) { border-bottom: 0; }
  .split { grid-template-columns: 1fr; gap: 52px; }
  .architecture { grid-template-columns: 1fr; }
  .arrow { transform: rotate(90deg); justify-self: center; }
  .checklist { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .site-header, main, footer { padding-left: 18px; padding-right: 18px; }
  .mouette { width: 54px; }
  .milestones { grid-template-columns: 1fr; }
  .milestones article, .milestones article:nth-child(2n), .milestones article:nth-last-child(-n+2) { border-right: 0; border-bottom: 1px solid var(--line); }
  .milestones article:last-child { border-bottom: 0; }
  .next { margin-left: -18px; margin-right: -18px; padding-left: 18px; padding-right: 18px; border-radius: 0; }
  .closing { grid-template-columns: 64px 1fr; }
  .closing img { width: 60px; }
  footer { align-items: flex-start; flex-direction: column; }
}