:root {
  --bg: #070b14;
  --bg-alt: #0c1322;
  --surface: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.09);
  --text: #e8edf5;
  --muted: #94a0b4;
  --green: #3ddc84;
  --cyan: #38bdf8;
  --flame: #ff8a3d;
  --radius: 18px;
  --font-head: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-family: var(--font-head); line-height: 1.12; margin: 0 0 .6em; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.6rem, 6.5vw, 5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }

.container { width: min(1160px, 100% - 3rem); margin-inline: auto; }

.skip {
  position: absolute; left: 1rem; top: -100px; z-index: 100;
  background: var(--green); color: #04120a; padding: .6rem 1rem; border-radius: 8px;
}
.skip:focus { top: 1rem; }

.eyebrow {
  font-family: var(--font-head);
  font-size: .8rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .18em;
  color: var(--green);
  margin-bottom: 1rem;
}
.grad {
  background: linear-gradient(90deg, var(--green), var(--cyan));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .95rem 1.6rem; border-radius: 999px;
  background: linear-gradient(135deg, var(--green), #22c3a6);
  color: #04120a; font-weight: 600;
  box-shadow: 0 10px 30px -10px rgba(61, 220, 132, .6);
  transition: transform .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -10px rgba(61, 220, 132, .75); }
.btn--ghost {
  background: transparent; color: var(--text);
  border: 1px solid var(--border); box-shadow: none;
  backdrop-filter: blur(6px);
}
.btn--ghost:hover { border-color: var(--green); box-shadow: none; }
.btn--small { padding: .6rem 1.15rem; font-size: .92rem; }

/* Nav */
.nav {
  position: fixed; inset: 0 0 auto; z-index: 50;
  transition: background .3s, border-color .3s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(7, 11, 20, .78);
  backdrop-filter: blur(14px);
  border-color: var(--border);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.nav__logo img { height: 46px; width: auto; }
.nav__menu { display: flex; align-items: center; gap: 2rem; font-weight: 500; }
.nav__menu a { white-space: nowrap; }
.nav__menu a:not(.btn) { color: var(--muted); transition: color .2s; }
.nav__menu a:not(.btn):hover { color: var(--text); }
.lang-toggle {
  padding: .45rem .75rem; border: 1px solid var(--border); border-radius: 999px;
  background: transparent; color: var(--green); font: inherit; font-size: .9rem;
  font-weight: 600; cursor: pointer; transition: border-color .2s, color .2s;
}
.lang-toggle:hover { border-color: var(--green); color: var(--text); }
.lang-toggle:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; }
.nav__toggle { display: none; background: none; border: 0; padding: .5rem; cursor: pointer; }
.nav__toggle span { display: block; width: 24px; height: 2px; background: var(--text); margin: 5px 0; transition: .3s; }

/* Hero */
.hero {
  position: relative; min-height: min(100vh, 960px); min-height: min(100svh, 960px);
  display: flex; align-items: center; overflow: hidden;
  padding: 120px 0 80px;
}
.hero__bg {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(7,11,20,.96) 0%, rgba(7,11,20,.75) 45%, rgba(7,11,20,.25) 100%),
    linear-gradient(0deg, var(--bg) 0%, transparent 35%),
    url("assets/accueil.png") 70% top / cover no-repeat;
  /* Zoom ancré en haut : la fusée de la photo reste sous le menu */
  transform: scale(1.05); transform-origin: 50% 0;
  animation: drift 20s ease-in-out infinite alternate;
}
.hero__bg::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(600px circle at 15% 40%, rgba(61,220,132,.14), transparent 60%);
}
@keyframes drift { to { transform: scale(1.12) translateY(-12px); } }
.hero__content { position: relative; max-width: 760px; margin-left: max(1.5rem, (100% - 1160px) / 2); }
.hero__lead { font-size: clamp(1.05rem, 1.6vw, 1.25rem); color: #c4cddb; max-width: 600px; margin-bottom: 2.2rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; }
.hero__scroll {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
  width: 26px; height: 42px; border: 2px solid var(--border); border-radius: 20px;
}
.hero__scroll span {
  position: absolute; left: 50%; top: 8px; width: 4px; height: 8px; margin-left: -2px;
  background: var(--green); border-radius: 2px; animation: scroll 1.8s infinite;
}
@keyframes scroll { 0% { opacity: 0; transform: translateY(0); } 40% { opacity: 1; } 100% { opacity: 0; transform: translateY(14px); } }

/* Sections */
.section { padding: clamp(5rem, 10vw, 8rem) 0; position: relative; }
.section--alt { background: var(--bg-alt); }
.section__head { max-width: 640px; margin-bottom: 3.5rem; }

/* Split */
.split { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(2rem, 6vw, 5rem); align-items: center; }
.split__media { position: relative; }
.split__media img {
  border-radius: var(--radius); width: 100%; aspect-ratio: 4 / 3; object-fit: cover;
  border: 1px solid var(--border);
}
.split__media::before {
  content: ""; position: absolute; inset: -18px 18px 18px -18px; z-index: -1;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(61,220,132,.35), rgba(56,189,248,.15));
  filter: blur(30px);
}
.split__text p { color: var(--muted); font-size: 1.08rem; }
.split__text strong { color: var(--text); }
.tags { list-style: none; padding: 0; margin: 1.8rem 0 0; display: flex; flex-wrap: wrap; gap: .6rem; }
.tags li {
  padding: .4rem .95rem; border-radius: 999px; font-size: .88rem;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
}

/* Nos fusées */
.section--rockets {
  border-top: 1px solid var(--border);
  background: radial-gradient(900px circle at 50% 0%, rgba(56,189,248,.07), transparent 60%);
}
.section__lead { color: var(--muted); font-size: 1.08rem; margin: 0; }
.rockets__intro { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 1.5rem 3rem; margin-bottom: 3.5rem; }
.rockets__intro .section__head { margin-bottom: 0; }
.units { display: flex; align-items: center; gap: .8rem; color: var(--muted); font-size: .9rem; }
.units__switch { display: inline-flex; padding: 4px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); }
.units__switch button {
  padding: .45rem 1rem; border: 0; border-radius: 999px; background: transparent;
  color: var(--muted); font: inherit; font-weight: 600; cursor: pointer; transition: background .2s, color .2s;
}
.units__switch button:hover { color: var(--text); }
.units__switch button[aria-pressed="true"] { background: linear-gradient(135deg, var(--green), #22c3a6); color: #04120a; }
.units__switch button:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; }
.rockets__note { margin: 1.5rem 0 0; color: var(--muted); font-size: .85rem; }
.rockets { display: grid; grid-template-columns: repeat(3, 1fr); column-gap: 1.5rem; }
/* Sous-grille : les lignes de caractéristiques restent alignées d’une carte à l’autre */
.rocket {
  grid-row: span 7; display: grid; grid-template-rows: subgrid; row-gap: 0;
  padding-bottom: 1.6rem; border-radius: var(--radius); overflow: hidden;
  background: var(--surface); border: 1px solid var(--border);
}
.rocket:hover { border-color: rgba(61,220,132,.4); }
.rocket__media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--bg-alt); }
.rocket__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.rocket:hover .rocket__media img { transform: scale(1.04); }
.rocket__media--soon {
  display: grid; place-content: center; justify-items: center; gap: .8rem;
  color: var(--muted); font-size: .9rem; border-bottom: 1px solid var(--border);
  background:
    radial-gradient(circle at 50% 45%, rgba(61,220,132,.12), transparent 55%),
    repeating-linear-gradient(0deg, rgba(255,255,255,.04) 0 1px, transparent 1px 28px),
    repeating-linear-gradient(90deg, rgba(255,255,255,.04) 0 1px, transparent 1px 28px),
    var(--bg-alt);
}
.rocket__media--soon svg { width: 46px; height: 46px; fill: none; stroke: var(--green); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.rocket__head { padding: 1.5rem 1.6rem 0; }
.rocket__head h3 { font-size: 1.6rem; margin: 0; }
.rocket__head p { margin: .15rem 0 0; color: var(--muted); font-size: .92rem; }
.rocket__status {
  list-style: none; margin: 0; padding: 1rem 1.6rem 0;
  display: grid; align-content: start; gap: .4rem; font-size: .92rem; color: var(--muted);
}
.rocket__status li { display: flex; align-items: flex-start; gap: .65rem; }
.rocket__status li::before {
  content: ""; flex: none; width: 7px; height: 7px; margin-top: .6em;
  border-radius: 50%; background: rgba(255,255,255,.25);
}
.rocket__status .is-live, .rocket__status .is-planned { color: var(--text); }
.rocket__status .is-live::before { background: var(--green); animation: pulse 2s infinite; }
.rocket__status .is-planned::before { background: var(--flame); }
@keyframes pulse { from { box-shadow: 0 0 0 0 rgba(61,220,132,.6); } 70%, to { box-shadow: 0 0 0 7px rgba(61,220,132,0); } }
.rocket__stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: .45rem .5rem;
  margin: 1.4rem 1.6rem 0; padding: 1.1rem 0; border-block: 1px solid var(--border);
  container-type: inline-size;
}
/* Valeurs sur la 1re ligne, libellés sur la 2e : les libellés restent alignés malgré la vitesse en m/s */
.rocket__stats div { display: contents; }
.rocket__stats dt { grid-row: 2; font-size: .7rem; font-weight: 600; line-height: 1.3; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.rocket__stats dd {
  grid-row: 1; margin: 0; font-family: var(--font-head); font-weight: 700; line-height: 1.1; white-space: nowrap;
  font-size: 1.3rem; font-size: clamp(1rem, 6.8cqi, 1.5rem);
}
.rocket__stats small, .rocket__stats .unit { font-size: .6em; font-weight: 600; color: var(--muted); }
.rocket__speed { display: block; margin-top: .3rem; font-family: var(--font-body); font-size: .8rem; font-weight: 500; color: var(--muted); }
.rocket__stats .rocket__speed .unit { font-size: 1em; font-weight: inherit; }
.rocket__group { padding: 1.4rem 1.6rem 0; }
.rocket__group h4 {
  margin: 0 0 .25rem; font-family: var(--font-head); font-size: .75rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .16em; color: var(--green);
}
.rocket__specs { margin: 0; }
.rocket__specs div { display: flex; justify-content: space-between; gap: 1rem; padding: .5rem 0; border-bottom: 1px solid var(--border); font-size: .94rem; }
.rocket__specs div:last-child { border-bottom: 0; padding-bottom: 0; }
.rocket__specs dt { color: var(--muted); }
.rocket__specs dd { margin: 0; font-weight: 600; text-align: right; white-space: nowrap; }
.frac sup, .frac sub { font-size: .7em; line-height: 0; }
.rocket__note {
  margin: 1.4rem 1.6rem 0; padding: .8rem 1rem; border-radius: 12px;
  border: 1px solid rgba(255,138,61,.3); background: rgba(255,138,61,.08);
  color: #f6cfae; font-size: .88rem; line-height: 1.5;
}

/* Cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.card {
  padding: 2.2rem; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
  transition: transform .3s, border-color .3s, background .3s;
}
.card:hover { transform: translateY(-6px); border-color: rgba(61,220,132,.4); background: rgba(61,220,132,.04); }
.card p { color: var(--muted); margin: 0; }
.card__icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(61,220,132,.18), rgba(56,189,248,.12));
  margin-bottom: 1.4rem;
}
.card__icon svg { width: 26px; height: 26px; fill: none; stroke: var(--green); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* Steps */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; counter-reset: s; }
.step { position: relative; padding-top: 2rem; border-top: 1px solid var(--border); }
.step::before {
  content: ""; position: absolute; top: -1px; left: 0; width: 48px; height: 2px;
  background: linear-gradient(90deg, var(--flame), var(--green));
}
.step__num { font-family: var(--font-head); font-size: 2.4rem; font-weight: 700; color: rgba(255,255,255,.12); display: block; margin-bottom: .6rem; }
.step p { color: var(--muted); margin: 0; }

/* CTA / Contact */
.section--cta {
  background:
    radial-gradient(800px circle at 0% 0%, rgba(61,220,132,.12), transparent 55%),
    radial-gradient(700px circle at 100% 100%, rgba(255,138,61,.10), transparent 55%),
    var(--bg-alt);
}
.cta { display: grid; grid-template-columns: 1fr 1.2fr; gap: clamp(2rem, 6vw, 5rem); align-items: start; }
.cta__text p { color: var(--muted); font-size: 1.08rem; }
.cta__form {
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); background: #fff;
  box-shadow: 0 30px 80px -30px rgba(0,0,0,.7);
}
.cta__form iframe { width: 100%; height: 640px; border: 0; display: block; }
.cta__fallback { display: block; padding: .9rem 1.2rem; font-size: .9rem; background: var(--bg); color: var(--muted); border-top: 1px solid var(--border); }
.cta__fallback:hover { color: var(--green); }
.socials { display: flex; gap: .8rem; margin-top: 2rem; flex-wrap: wrap; }
.socials a {
  display: inline-flex; align-items: center; gap: .55rem;
  padding: .7rem 1.1rem; border-radius: 12px;
  background: var(--surface); border: 1px solid var(--border);
  transition: border-color .2s, transform .2s;
}
.socials a:hover { border-color: var(--green); transform: translateY(-2px); }
.socials svg { width: 18px; height: 18px; fill: currentColor; }

/* Footer */
.footer { padding: 2.5rem 0; border-top: 1px solid var(--border); }
.footer__inner { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; }
.footer p { margin: 0; color: var(--muted); font-size: .9rem; }
.footer nav { display: flex; gap: 1.5rem; }
.footer nav a { color: var(--muted); font-size: .9rem; }
.footer nav a:hover { color: var(--green); }

/* Fusée qui décolle au défilement (dans la marge de gauche : ordinateurs et tablettes) */
.liftoff { display: none; }
@media (min-width: 1280px), (min-width: 700px) and (min-height: 600px) {
  .liftoff {
    position: fixed; inset: 0 auto 0 0; z-index: 60; /* au-dessus du menu : jamais cachée en haut */
    width: max((100% - 1160px) / 2, 1.5rem + var(--rail, 0px));
    display: flex; justify-content: center; align-items: flex-end;
    pointer-events: none;
  }
}
.liftoff__rocket { position: relative; width: calc(clamp(30px, min(7vh, 100% - 32px), 64px) * 2 / 3); will-change: transform; }
/* Tablettes (iPad) : la marge de gauche est trop étroite, on y réserve un couloir pour la fusée */
@media (min-width: 700px) and (max-width: 1279px) and (min-height: 600px) {
  :root { --rail: 44px; }
  .container { width: min(1160px, 100% - 3rem - var(--rail)); margin-left: calc(1.5rem + var(--rail)); }
  .hero__content { margin-left: calc(1.5rem + var(--rail)); margin-right: 1.5rem; }
  .liftoff__rocket { width: min(7vh * 2 / 3, 36px); }
  .nav.is-open ~ .liftoff { visibility: hidden; } /* menu mobile ouvert (iPad mini) */
}
.liftoff__rocket img {
  position: relative; z-index: 1; width: 100%; height: auto;
  filter: drop-shadow(0 0 1px rgba(205,220,240,.6)) drop-shadow(0 0 22px rgba(56,189,248,.14));
}
.liftoff__flame, .liftoff__trail, .liftoff__smoke { position: absolute; opacity: 0; transition: opacity .4s; }
.liftoff.is-flying .liftoff__flame, .liftoff.is-flying .liftoff__trail { opacity: 1; }
.liftoff__flame {
  top: calc(100% - 3px); left: 50%; width: 30%; height: 26%;
  transform: translateX(-50%) scaleY(var(--thrust, 0)); transform-origin: 50% 0;
}
.liftoff__flame::before, .liftoff__flame::after { content: ""; position: absolute; }
.liftoff__flame::before {
  inset: 0; border-radius: 50% 50% 50% 50% / 10% 10% 90% 90%;
  background: linear-gradient(180deg, #fffbe8 0%, #ffd27a 22%, var(--flame) 55%, rgba(255,92,40,0) 100%);
  filter: blur(1.5px); transform-origin: 50% 0;
  animation: flicker .12s ease-in-out infinite alternate;
}
.liftoff__flame::after {
  left: 50%; top: -12%; width: 420%; height: 70%; transform: translateX(-50%);
  background: radial-gradient(closest-side, rgba(255,138,61,.4), transparent);
  filter: blur(8px);
}
@keyframes flicker { to { transform: scaleX(.86) scaleY(1.08); opacity: .85; } }
.liftoff__trail {
  top: 100%; left: 50%; width: 40%; height: 60vh; transform: translateX(-50%);
  border-radius: 40% 40% 50% 50%; filter: blur(5px);
  background: linear-gradient(180deg, rgba(225,232,242,.28), rgba(225,232,242,.08) 40%, transparent 85%);
}
.liftoff__smoke {
  left: 50%; bottom: 0; width: clamp(200px, 140%, 340px); aspect-ratio: 2;
  opacity: var(--smoke, 0);
  transform: translate(-50%, 30%) scale(calc(1.5 - var(--smoke, 0) * .5));
  background:
    radial-gradient(closest-side, rgba(255,176,112,.45), transparent) 50% 55% / 30% 40% no-repeat,
    radial-gradient(closest-side, rgba(226,232,240,.6), transparent) 50% 35% / 50% 65% no-repeat,
    radial-gradient(closest-side, rgba(226,232,240,.45), transparent) 22% 62% / 48% 58% no-repeat,
    radial-gradient(closest-side, rgba(226,232,240,.45), transparent) 78% 62% / 48% 58% no-repeat,
    radial-gradient(closest-side, rgba(226,232,240,.3), transparent) 50% 80% / 100% 50% no-repeat;
  filter: blur(8px);
}

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s ease, transform .8s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 960px) {
  .nav__menu { gap: 1.25rem; }
  .cards { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); row-gap: 2.5rem; }
  .split, .cta { grid-template-columns: 1fr; }
  .rockets { grid-template-columns: 1fr; row-gap: 1.5rem; max-width: 560px; margin-inline: auto; }
  .rockets__note { max-width: 560px; margin-inline: auto; }
  .rocket { grid-row: auto; display: flex; flex-direction: column; }
}
@media (max-width: 760px) {
  .nav__toggle { display: block; }
  .nav__menu {
    position: fixed; inset: 76px 0 auto; flex-direction: column; gap: 1.4rem;
    padding: 2rem; background: rgba(7,11,20,.97); backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%); opacity: 0; pointer-events: none; transition: .35s;
  }
  .nav.is-open .nav__menu { transform: none; opacity: 1; pointer-events: auto; }
  .nav.is-open { background: rgba(7,11,20,.97); }
  .nav.is-open .nav__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav.is-open .nav__toggle span:nth-child(2) { opacity: 0; }
  .nav.is-open .nav__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .hero__bg {
    background:
      linear-gradient(0deg, var(--bg) 5%, rgba(7,11,20,.7) 55%, rgba(7,11,20,.45) 100%),
      url("assets/accueil.png") 55% center / cover no-repeat;
  }
  .steps { grid-template-columns: 1fr; }
  .footer__inner { flex-direction: column; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
  .liftoff { display: none; }
}