:root {
  --bg: #040a17;
  --bg-2: #0a1327;
  --panel: rgba(10, 18, 38, 0.82);
  --panel-strong: rgba(12, 22, 46, 0.92);
  --line: rgba(255,255,255,0.1);
  --text: #edf5ff;
  --muted: #b7c6e7;
  --accent: #71d2ff;
  --accent-2: #ffd36d;
  --shadow: 0 30px 70px rgba(0,0,0,0.35);
  --radius: 26px;
  --max: 1320px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 15%, rgba(114, 64, 176, 0.16), transparent 20%),
    radial-gradient(circle at 80% 18%, rgba(41, 117, 255, 0.14), transparent 22%),
    radial-gradient(circle at 60% 75%, rgba(91, 49, 151, 0.16), transparent 24%),
    linear-gradient(180deg, #02050d 0%, #07101e 38%, #040a17 100%);
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.shell { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 80;
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
  padding: 14px 20px;
  background: rgba(3, 7, 17, 0.76);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: 0.02em; }
.brand img { width: 42px; height: 42px; }
.main-nav { display: flex; flex-wrap: wrap; gap: 10px; font-size: 14px; color: var(--muted); }
.main-nav a { padding: 8px 12px; border-radius: 999px; transition: 0.2s ease; }
.main-nav a:hover { background: rgba(255,255,255,0.08); color: var(--text); }
.eyebrow {
  margin: 0 0 14px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 12px;
  color: var(--accent-2);
}
.hero {
  position: relative;
  min-height: 96vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(3, 8, 20, 0.26), rgba(3, 8, 20, 0.8)),
    linear-gradient(180deg, rgba(4, 9, 20, 0.12), rgba(4, 9, 20, 0.72)),
    url('assets/00_soleil/soleil_planete.webp') center/cover no-repeat;
  transform: scale(1.05);
}
.hero-content {
  position: relative; z-index: 2;
  padding: 92px 0 80px;
}
.hero h1 {
  margin: 0;
  max-width: 11ch;
  font-size: clamp(48px, 7vw, 94px);
  line-height: 0.95;
}
.hero-lead {
  max-width: 70ch;
  margin: 22px 0 0;
  font-size: 20px;
  line-height: 1.72;
  color: var(--muted);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 50px; padding: 0 20px; border-radius: 999px;
  font-weight: 700; border: 1px solid rgba(255,255,255,0.12);
  box-shadow: var(--shadow);
}
.button.primary { background: linear-gradient(135deg, #5fb7ff, #95e6ff); color: #041120; }
.button.secondary { background: rgba(255,255,255,0.05); }
.stats-grid {
  margin-top: 38px;
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px;
  width: min(980px, 100%);
}
.stat-card, .info-card, .overview-copy, .section-copy, .closing-card, .faq-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.stat-card { padding: 18px; }
.stat-card strong { display: block; margin-bottom: 6px; font-size: 16px; }
.stat-card span { color: var(--muted); line-height: 1.55; font-size: 14px; }
.intro-band {
  margin-top: 26px;
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px;
}
.info-card, .overview-copy, .section-copy, .closing-card { padding: 28px; }
.info-card h2, .overview-copy h2, .closing-card h2, .faq h2 { margin: 0 0 12px; font-size: clamp(28px, 3vw, 42px); }
.info-card p, .overview-copy p, .section-copy p, .closing-card p, .faq-card p {
  color: var(--muted); line-height: 1.8; margin: 0;
}
.chapter-overview {
  margin-top: 24px;
  display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr); gap: 18px;
}
.overview-list {
  display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px;
  align-content: start;
}
.overview-list span {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px 16px;
  font-weight: 700;
}
.planet-section {
  margin-top: 24px;
  display: grid; grid-template-columns: minmax(300px, 390px) minmax(0, 1fr); gap: 26px; align-items: start;
}
.planet-section.alt .section-copy { background: var(--panel-strong); }
.section-copy {
  position: sticky; top: 92px;
}
.section-copy h2 {
  margin: 4px 0 10px;
  font-size: clamp(38px, 4vw, 56px);
}
.section-copy .lead {
  font-size: 18px; line-height: 1.72; color: var(--text); margin-bottom: 14px;
}
.section-copy p + p { margin-top: 14px; }
.note-box {
  margin-top: 18px; padding: 16px 18px; border-radius: 18px;
  background: rgba(255,255,255,0.05); color: var(--muted);
  border: 1px solid rgba(255,255,255,0.08);
  line-height: 1.7;
}
.section-gallery {
  display: grid; gap: 18px;
}
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.three-up { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.one-up { grid-template-columns: 1fr; }
.gallery-card {
  margin: 0; overflow: hidden; border-radius: 22px;
  background: rgba(8, 12, 28, 0.82); border: 1px solid var(--line); box-shadow: var(--shadow);
}
.gallery-card img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; }
.hero-card img { aspect-ratio: 16 / 11; }
.gallery-card.wide { grid-column: 1 / -1; }
.gallery-card.wide img { aspect-ratio: 16 / 8; }
.gallery-card figcaption {
  padding: 14px 16px; color: var(--muted); font-size: 14px; line-height: 1.55;
  border-top: 1px solid var(--line);
}
.closing, .faq { margin-top: 28px; }
.faq-grid {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px;
}
.faq-card { padding: 24px; }
.faq-card h3 { margin: 0 0 8px; font-size: 22px; }
.site-footer {
  margin-top: 40px; padding: 34px 0 46px; border-top: 1px solid var(--line); background: rgba(3,7,17,0.65);
}
.footer-inner {
  display: flex; justify-content: space-between; gap: 24px; align-items: flex-start;
}
.footer-inner p { max-width: 62ch; color: var(--muted); line-height: 1.7; margin: 10px 0 0; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 12px; }
.footer-nav a {
  padding: 10px 14px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255,255,255,0.04);
}
.page-main { padding: 42px 0 60px; }
.legal-card {
  max-width: 900px; margin: 0 auto; padding: 30px; background: var(--panel); border: 1px solid var(--line); border-radius: 28px; box-shadow: var(--shadow);
}
.legal-card h1 { margin-top: 0; font-size: clamp(36px, 5vw, 58px); }
.legal-card h2 { margin: 26px 0 12px; font-size: 28px; }
.legal-card p, .legal-card li { color: var(--muted); line-height: 1.8; }
.legal-card ul { padding-left: 20px; }
@media (max-width: 1080px) {
  .planet-section, .chapter-overview { grid-template-columns: 1fr; }
  .section-copy { position: static; }
}
@media (max-width: 860px) {
  .main-nav { display: none; }
  .hero { min-height: auto; }
  .hero-content { padding: 70px 0 56px; }
  .hero h1 { max-width: none; }
  .stats-grid, .intro-band, .faq-grid, .grid-2, .three-up, .footer-inner { grid-template-columns: 1fr; display: grid; }
  .overview-list { grid-template-columns: 1fr; }
}