:root {
  --bg: #050607;
  --bg-2: #0b0d10;
  --line: #1c2026;
  --text: #eceef1;
  --dim: #9298a0;
  --faint: #5d636b;
  --green: #8cd62e;
  --green-2: #76c417;
  --green-3: #4f8a12;
  --radius: 18px;
  --max: 1180px;
  --font: "Inter", "Segoe UI Variable Text", "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Mono", Consolas, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img, video { display: block; max-width: 100%; height: auto; }
em { font-style: normal; color: var(--text); }

/* lueur verte en haut de page, comme le neon du trailer */
.neon {
  position: absolute; left: 0; right: 0; top: -320px; height: 900px;
  background: radial-gradient(50% 50% at 50% 50%, rgba(140, 214, 46, 0.16), transparent 70%);
  pointer-events: none; z-index: 0;
}

/* ------------------------------------------------------------ navigation */
.nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--max); margin: 0 auto; padding: 16px 24px;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: rgba(5, 6, 7, 0.72);
  border-bottom: 1px solid transparent;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: 0.04em; }
.brand .mark { width: 30px; height: 20px; }
.nav nav { display: flex; align-items: center; gap: 26px; font-size: 14px; color: var(--dim); }
.nav nav a:hover { color: var(--text); }
.nav-cta { color: var(--bg) !important; background: var(--green); padding: 7px 14px; border-radius: 999px; font-weight: 600; }
.nav-cta:hover { background: #a2e64a; }

body { position: relative; }
main, .footer { position: relative; z-index: 1; }
section { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ------------------------------------------------------------ logo */
#prism-mark line, #prism-mark polygon { stroke-linecap: round; stroke-linejoin: round; fill: none; }
#prism-mark .beam { stroke: #e8eaee; stroke-width: 13; }
#prism-mark .inner { stroke: #8c9296; stroke-width: 7; }
#prism-mark .tri { stroke: #c9ced6; stroke-width: 13; }
#prism-mark .tri-fill { fill: #1e2412; stroke: none; }
#prism-mark .r1 { stroke: #a6e23c; stroke-width: 13; }
#prism-mark .r2 { stroke: #7cc417; stroke-width: 13; }
#prism-mark .r3 { stroke: #4f8a12; stroke-width: 13; }

.hero-mark { width: min(300px, 70vw); margin: 0 auto 26px; overflow: visible; }
.hero-mark .animated { filter: url(#glow); }
@media (prefers-reduced-motion: no-preference) {
  .hero-mark .animated .beam { stroke-dasharray: 100; stroke-dashoffset: 100; animation: draw .7s .2s cubic-bezier(.65,0,.35,1) forwards; }
  .hero-mark .animated .tri { stroke-dasharray: 560; stroke-dashoffset: 560; animation: draw 1.1s .5s cubic-bezier(.65,0,.35,1) forwards; }
  .hero-mark .animated .tri-fill { opacity: 0; animation: fade .6s 1.4s forwards; }
  .hero-mark .animated .inner { stroke-dasharray: 110; stroke-dashoffset: 110; animation: draw .4s 1.3s ease-out forwards; }
  .hero-mark .animated .ray { stroke-dasharray: 100; stroke-dashoffset: 100; animation: draw .5s 1.65s cubic-bezier(.2,.8,.2,1) forwards; }
  .hero h1, .hero .lede, .hero .eyebrow, .hero .cta, .hero .meta { opacity: 0; transform: translateY(10px); animation: rise .8s cubic-bezier(.2,.8,.2,1) forwards; }
  .hero .eyebrow { animation-delay: 1.9s; }
  .hero h1 { animation-delay: 2.0s; }
  .hero .lede { animation-delay: 2.15s; }
  .hero .cta { animation-delay: 2.3s; }
  .hero .meta { animation-delay: 2.4s; }
}
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes fade { to { opacity: 1; } }
@keyframes rise { to { opacity: 1; transform: none; } }

/* ------------------------------------------------------------ typographie */
.eyebrow { font-family: var(--mono); font-size: 13px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--green); margin: 0 0 14px; }
h1, h2, h3 { letter-spacing: -0.025em; line-height: 1.05; margin: 0; font-weight: 700; }
h1 { font-size: clamp(42px, 7vw, 84px); }
h2 { font-size: clamp(34px, 5vw, 60px); }
h3 { font-size: clamp(26px, 3vw, 38px); margin-bottom: 14px; }
h4 { font-size: 19px; margin: 18px 0 6px; letter-spacing: -0.01em; }
.lede { font-size: clamp(18px, 2vw, 21px); color: var(--dim); max-width: 680px; margin: 22px auto 0; }
.small { font-size: 13px; color: var(--faint); }

/* ------------------------------------------------------------ hero */
.hero { text-align: center; padding-top: 110px; padding-bottom: 110px; }
.cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 36px; }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 24px; border-radius: 999px; font-weight: 600; font-size: 16px; transition: background .2s, transform .2s, box-shadow .2s; }
.btn svg { width: 19px; height: 19px; stroke: currentColor; stroke-width: 2.2; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.btn.primary { background: var(--green); color: #07090a; box-shadow: 0 0 0 0 rgba(140, 214, 46, 0); }
.btn.primary:hover { background: #a2e64a; box-shadow: 0 0 40px 0 rgba(140, 214, 46, 0.35); transform: translateY(-1px); }
.btn.ghost { color: var(--text); border: 1px solid var(--line); }
.btn.ghost:hover { border-color: #39404a; background: var(--bg-2); }
.btn.big { padding: 18px 32px; font-size: 18px; }
.meta { color: var(--faint); font-size: 14px; margin: 16px 0 0; }

/* ------------------------------------------------------------ trailer */
.trailer { padding-bottom: 160px; }
.frame { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); background: #000; box-shadow: 0 40px 120px -40px rgba(140, 214, 46, 0.18); }
.frame video { width: 100%; aspect-ratio: 16 / 9; }

/* ------------------------------------------------------------ fonctionnalites */
.section-head { text-align: center; margin-bottom: 80px; }
.features { padding-bottom: 120px; }
.row { display: grid; grid-template-columns: 4fr 7fr; gap: 64px; align-items: center; margin-bottom: 140px; }
.row.flip { grid-template-columns: 7fr 4fr; }
.row.flip .copy { order: 2; }
.row .copy p:not(.eyebrow) { color: var(--dim); margin: 0; }
figure { margin: 0; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); background: #000; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 14px 24px; }
.card img { border-radius: 10px; }
.card h4, .card p { padding: 0 8px; }
.card p { color: var(--dim); font-size: 15px; margin: 0; }

/* reveal au defilement */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .9s cubic-bezier(.2,.8,.2,1), transform .9s cubic-bezier(.2,.8,.2,1); }
.reveal.on { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* ------------------------------------------------------------ securite */
.safety { padding-bottom: 140px; }
.wide { margin-bottom: 56px; }
.pillars { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.pillars li { border-top: 1px solid var(--line); padding-top: 18px; }
.pillars strong { display: block; font-size: 17px; margin-bottom: 6px; }
.pillars span { color: var(--dim); font-size: 15px; }

/* ------------------------------------------------------------ telechargement */
.download { text-align: center; padding-bottom: 140px; }
.download h2 { margin-bottom: 36px; }
.alt-links { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; margin: 26px 0 0; font-size: 14px; color: var(--dim); }
.alt-links a:hover { color: var(--green); }
.reqs { margin: 56px auto 0; border-collapse: collapse; font-size: 15px; text-align: left; }
.reqs th { color: var(--faint); font-weight: 500; padding: 10px 28px 10px 0; vertical-align: top; font-family: var(--mono); font-size: 12px; letter-spacing: .16em; text-transform: uppercase; }
.reqs td { color: var(--dim); padding: 10px 0; border-bottom: 1px solid var(--line); }
.reqs tr:last-child td { border-bottom: 0; }

/* ------------------------------------------------------------ faq */
.faq { max-width: 820px; padding-bottom: 120px; }
.faq h2 { text-align: center; margin-bottom: 40px; }
details { border-bottom: 1px solid var(--line); padding: 20px 0; }
summary { cursor: pointer; font-weight: 600; font-size: 18px; list-style: none; display: flex; justify-content: space-between; gap: 20px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--green); font-weight: 400; font-size: 24px; line-height: 1; transition: transform .25s; }
details[open] summary::after { transform: rotate(45deg); }
details p { color: var(--dim); margin: 12px 0 0; }

/* ------------------------------------------------------------ credits et pied */
.credits { text-align: center; padding-bottom: 80px; }
.names { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 28px; font-size: 16px; color: var(--dim); margin: 0 0 14px; }
.names a:hover { color: var(--text); }
.footer { text-align: center; border-top: 1px solid var(--line); padding: 36px 24px 48px; color: var(--dim); font-size: 14px; }
.footer a:hover { color: var(--green); }
.footer p { margin: 0 0 6px; }

/* ------------------------------------------------------------ mobile */
@media (max-width: 860px) {
  body { font-size: 16px; }
  h1 br, h2 br { display: none; }
  .nav { padding: 12px 16px; }
  .nav nav a:not(.nav-cta) { display: none; }
  section { padding: 0 16px; }
  .row, .row.flip { grid-template-columns: 1fr; gap: 24px; margin-bottom: 88px; }
  .row.flip .copy { order: 0; }
  .grid, .pillars { grid-template-columns: 1fr; }
  .reqs th { padding-right: 14px; }
}