:root {
  --bg: #04070d;
  --surface: #0b111a;
  --surface-2: #0d1219;
  --line: #171e2a;
  --line-strong: #232b3c;
  --accent: #333a52;
  --accent-line: #4f5878;
  --text: #e4e7ec;
  --text-bright: #edf0f7;
  --muted: #8a94a6;
  --dim: #5e6e80;
  --max: 1080px;
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--text-bright);
  text-decoration-color: var(--accent-line);
  text-underline-offset: 4px;
}

a:hover {
  text-decoration-color: var(--text-bright);
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* En-tête */

.site-head {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(4, 7, 13, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 0.5px solid var(--line);
}

.site-head .wrap {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  font-size: 17px;
  letter-spacing: 0.5px;
  color: var(--text-bright);
  text-decoration: none;
  margin-right: auto;
}

.site-nav {
  display: flex;
  gap: 22px;
  font-size: 15px;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--text-bright);
}

/* Sections */

section {
  padding: 92px 0;
  border-bottom: 0.5px solid var(--line);
}

section:last-of-type {
  border-bottom: 0;
}

h1 {
  font-size: clamp(34px, 5.4vw, 54px);
  line-height: 1.15;
  letter-spacing: -1px;
  margin: 0 0 20px;
  color: var(--text-bright);
}

h2 {
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin: 0 0 18px;
  color: var(--text-bright);
}

h3 {
  font-size: 18px;
  margin: 0 0 8px;
  color: var(--text-bright);
}

p {
  margin: 0 0 18px;
  max-width: 68ch;
}

.lead {
  font-size: clamp(18px, 2.2vw, 21px);
  color: var(--muted);
}

.eyebrow {
  font-size: 12px;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--dim);
  margin: 0 0 16px;
}

.muted {
  color: var(--muted);
}

.small {
  font-size: 14px;
  color: var(--dim);
}

/* Accueil */

.hero {
  padding: clamp(80px, 12vw, 150px) 0 92px;
  border-bottom: 0.5px solid var(--line);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 12px;
  background: var(--accent);
  color: var(--text-bright);
  font-size: 15px;
  text-decoration: none;
  border: 0.5px solid var(--accent-line);
}

.btn:hover {
  background: #3c445f;
}

.btn-ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--muted);
}

.btn-ghost:hover {
  background: var(--surface);
  color: var(--text-bright);
}

/* Grilles */

.grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-top: 36px;
}

.card {
  background: var(--surface);
  border: 0.5px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

/* Bloc projet */

.project {
  display: grid;
  gap: 48px;
  align-items: center;
  grid-template-columns: 1fr;
}

@media (min-width: 860px) {
  .project {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

.project-visual {
  display: flex;
  justify-content: center;
}

.ring-plate {
  width: min(320px, 70vw);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  background: var(--surface);
  border: 0.5px solid var(--line);
  border-radius: 48px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.tags li {
  font-size: 13px;
  color: var(--muted);
  border: 0.5px solid var(--line-strong);
  border-radius: 999px;
  padding: 5px 13px;
}

/* Texte long : politique, mentions */

.doc h2 {
  margin-top: 48px;
  font-size: 22px;
}

.doc h2:first-of-type {
  margin-top: 0;
}

.doc ul {
  margin: 0 0 18px;
  padding-left: 22px;
  max-width: 68ch;
  color: var(--muted);
}

.doc li {
  margin-bottom: 8px;
}

.doc table {
  width: 100%;
  max-width: 680px;
  border-collapse: collapse;
  margin: 0 0 24px;
  font-size: 15px;
}

.doc th,
.doc td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 0.5px solid var(--line);
  vertical-align: top;
}

.doc th {
  color: var(--dim);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}

.doc td {
  color: var(--muted);
}

/* Pied de page */

.site-foot {
  border-top: 0.5px solid var(--line);
  padding: 44px 0 60px;
  color: var(--dim);
  font-size: 14px;
}

.site-foot .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  align-items: center;
}

.site-foot a {
  color: var(--muted);
  text-decoration: none;
}

.site-foot a:hover {
  color: var(--text-bright);
}

.site-foot .spacer {
  margin-left: auto;
}

@media (max-width: 640px) {
  section {
    padding: 64px 0;
  }

  .site-head .wrap {
    height: 60px;
    gap: 16px;
  }

  .site-nav {
    gap: 16px;
    font-size: 14px;
  }
}