:root {
  --bg: #eef1fb;
  --bg-accent: #dfe3fb;
  --card: #ffffff;
  --text: #141a3a;
  --muted: #555c7a;
  --accent: #1a6dff;
  --border: rgba(20, 26, 58, 0.1);
  --radius: 16px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12142a;
    --bg-accent: #1b1f3e;
    --card: #1c1f38;
    --text: #eef0ff;
    --muted: #a6abc8;
    --accent: #5b95ff;
    --border: rgba(255, 255, 255, 0.1);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 85% 0%, var(--bg-accent), transparent 45%), var(--bg);
  min-height: 100vh;
}

/* Language switch: html[data-lang] shows only the matching blocks. */
html[data-lang="fr"] [lang="en"]:not(html),
html[data-lang="en"] [lang="fr"]:not(html) { display: none !important; }

a { color: var(--accent); }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

header.top {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  padding: 18px 20px;
}
header.top .brand { white-space: nowrap; display: flex; align-items: center; gap: 10px; font-weight: 600; color: var(--text); text-decoration: none; }
header.top .brand img { width: 32px; height: 32px; border-radius: 8px; }
nav.links { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
nav.links a { color: var(--muted); text-decoration: none; font-size: 15px; }
nav.links a:hover, nav.links a[aria-current="page"] { color: var(--text); }

.lang-switch { display: inline-flex; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.lang-switch button {
  font: inherit; font-size: 13px; padding: 4px 10px; border: 0; background: transparent; color: var(--muted); cursor: pointer;
}
html[data-lang="fr"] .lang-switch [data-set="fr"],
html[data-lang="en"] .lang-switch [data-set="en"] { background: var(--accent); color: #fff; }

.hero { text-align: center; padding: 56px 0 32px; }
.hero img.icon { width: 112px; height: 112px; border-radius: 26px; box-shadow: 0 12px 30px rgba(26, 109, 255, 0.25); }
.hero h1 { font-size: clamp(32px, 6vw, 54px); line-height: 1.1; margin: 22px 0 12px; letter-spacing: -0.02em; }
.hero p.lead { font-size: clamp(18px, 2.4vw, 22px); color: var(--muted); max-width: 680px; margin: 0 auto 28px; }

.button {
  display: inline-block; background: #000; color: #fff; text-decoration: none; font-weight: 600;
  padding: 12px 22px; border-radius: 12px;
}
@media (prefers-color-scheme: dark) { .button { background: #fff; color: #000; } }
.small-note { display: block; margin-top: 10px; font-size: 14px; color: var(--muted); }

.shots { display: grid; gap: 28px; margin: 40px 0; }
.shots img { width: 100%; height: auto; border-radius: var(--radius); box-shadow: 0 20px 50px rgba(20, 26, 58, 0.18); }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; margin: 40px 0 64px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); }

.doc { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px clamp(20px, 4vw, 44px); margin: 24px 0 64px; }
.doc h1 { margin-top: 0; letter-spacing: -0.01em; }
.doc h2 { margin-top: 32px; font-size: 20px; }
.doc .meta { color: var(--muted); font-size: 15px; }
.doc details { border-top: 1px solid var(--border); padding: 14px 0; }
.doc details:last-of-type { border-bottom: 1px solid var(--border); }
.doc summary { cursor: pointer; font-weight: 600; }
.doc details p, .doc details ol, .doc details ul { color: var(--muted); }
kbd { font: 14px ui-monospace, SFMono-Regular, Menlo, monospace; border: 1px solid var(--border); border-radius: 6px; padding: 1px 6px; }

footer { color: var(--muted); font-size: 14px; padding: 24px 0 40px; border-top: 1px solid var(--border); }
footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
footer a { color: var(--muted); }