/* EDUoctet : site vitrine au thème futuriste « ardoise et menthe ».
   Même famille d'effets que Socle Tutorat (ciel animé, verre, halos, grille en perspective), couleurs propres à EDUoctet :
   ardoise profonde, menthe, émeraude, cyan et or. Polices hébergées sur le site, aucun témoin, aucun appel externe. */
@font-face { font-family: "Space Grotesk"; font-weight: 300 700; font-display: swap; src: url("fonts/space-grotesk-latin-wght-normal.woff2") format("woff2"); }
@font-face { font-family: "Fraunces"; font-weight: 800; font-display: swap; src: url("fonts/fraunces-latin-800-normal.woff2") format("woff2"); }
@font-face { font-family: "DM Sans"; font-weight: 400; font-display: swap; src: url("fonts/dm-sans-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "DM Sans"; font-weight: 500; font-display: swap; src: url("fonts/dm-sans-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: "DM Sans"; font-weight: 700; font-display: swap; src: url("fonts/dm-sans-latin-700-normal.woff2") format("woff2"); }

:root {
  --night: #060d12;
  --slate: #0b161d;
  --slate-2: #11212b;
  --glass: rgba(18, 38, 48, 0.72);
  --line: rgba(110, 231, 183, 0.14);
  --mint: #6ee7b7;
  --mint-2: #34d399;
  --emerald: #10b981;
  --cyan: #22d3ee;
  --gold: #e0a93b;
  --gold-deep: #c8922a;
  --text: #e8f3ef;
  --text-soft: #b5c7c1;
  --paper: #eef6f2;
  --paper-2: #e2efe9;
  --ink: #0b161d;
  --ink-soft: #33474f;
  --green: #11663f;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5.5rem; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--night); color: var(--text); font: 400 1.0625rem/1.65 "DM Sans", "Segoe UI", system-ui, sans-serif; overflow-x: clip; position: relative; isolation: isolate; }
img, svg { display: block; max-width: 100%; }
a { color: var(--mint); text-underline-offset: 3px; }
a:hover { color: #a7f3d0; }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3 { font-family: "Space Grotesk", "DM Sans", system-ui, sans-serif; font-weight: 700; line-height: 1.08; letter-spacing: -0.025em; margin: 0; text-wrap: balance; color: #fff; }
p { margin: 0; text-wrap: pretty; }
::selection { background: var(--mint); color: var(--night); }

.wrap { position: relative; width: 100%; max-width: 74rem; margin: 0 auto; padding: 0 1.25rem; }
@media (min-width: 640px) { .wrap { padding: 0 2rem; } }
.skip { position: absolute; left: 1rem; top: -4rem; background: var(--gold); color: var(--night); padding: 0.6rem 1rem; border-radius: 8px; font-weight: 700; z-index: 100; }
.skip:focus { top: 0.75rem; }

/* Ciel : aurore menthe-cyan qui dérive, halo qui suit la souris, étoiles, barre de lecture. */
.fx-sky { position: fixed; inset: -20vmax; z-index: -2; pointer-events: none;
  background:
    radial-gradient(40vmax 30vmax at 15% 10%, rgba(16, 185, 129, 0.26), transparent 60%),
    radial-gradient(36vmax 28vmax at 88% 20%, rgba(34, 211, 238, 0.18), transparent 62%),
    radial-gradient(30vmax 24vmax at 60% 95%, rgba(224, 169, 59, 0.12), transparent 60%);
  animation: aurora 28s ease-in-out infinite; }
body::after { content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(520px circle at var(--mx, 50%) var(--my, -20%), rgba(110, 231, 183, 0.09), transparent 60%),
    linear-gradient(to right, rgba(110, 231, 183, 0.04) 1px, transparent 1px) 0 0 / 56px 56px,
    linear-gradient(to bottom, rgba(110, 231, 183, 0.04) 1px, transparent 1px) 0 0 / 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 30%, transparent 85%); mask-image: radial-gradient(ellipse at 50% 0%, #000 30%, transparent 85%); }
.fx-stars { position: fixed; inset: 0; z-index: -1; pointer-events: none; animation: twinkle 5s ease-in-out infinite alternate;
  background-image:
    radial-gradient(1.5px 1.5px at 12% 18%, rgba(255, 255, 255, 0.7), transparent),
    radial-gradient(1px 1px at 28% 72%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1.5px 1.5px at 46% 34%, rgba(167, 243, 208, 0.7), transparent),
    radial-gradient(1px 1px at 63% 12%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1.5px 1.5px at 78% 56%, rgba(255, 220, 150, 0.6), transparent),
    radial-gradient(1px 1px at 88% 84%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1px 1px at 6% 52%, rgba(165, 243, 252, 0.5), transparent),
    radial-gradient(1.5px 1.5px at 54% 88%, rgba(255, 255, 255, 0.55), transparent);
  background-size: 640px 640px; }
.fx-progress { position: fixed; inset: 0 0 auto 0; height: 3px; z-index: 60; pointer-events: none; transform-origin: 0 50%; transform: scaleX(var(--scroll, 0));
  background: linear-gradient(90deg, var(--gold), var(--mint), var(--cyan)); box-shadow: 0 0 12px rgba(110, 231, 183, 0.8); }

/* En-tête opaque : le texte reste net au-dessus de tout. */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(6, 13, 18, 0.96); border-bottom: 1px solid var(--line); box-shadow: 0 8px 24px -12px rgba(0, 0, 0, 0.6); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 4.5rem; }
.brand { display: inline-flex; align-items: center; gap: 0.75rem; text-decoration: none; color: #fff; }
.brand img { width: 40px; height: 40px; filter: drop-shadow(0 0 10px rgba(110, 231, 183, 0.35)); }
.wordmark { display: flex; flex-direction: column; line-height: 1; }
.wordmark b { font-family: "Fraunces", Georgia, serif; font-weight: 800; font-size: 1.45rem; color: #fff; }
.wordmark b span { color: var(--mint); }
.wordmark small { margin-top: 0.3rem; font-weight: 500; font-size: 0.62rem; letter-spacing: 0.18em; text-transform: uppercase; color: #94a3b8; }
.nav { display: flex; align-items: center; gap: 0.25rem; }
.nav a { color: #d3e3dd; text-decoration: none; font-weight: 500; font-size: 0.95rem; padding: 0.55rem 0.8rem; border-radius: 10px; min-height: 44px; display: inline-flex; align-items: center; transition: background-color 0.2s, color 0.2s; }
.nav a:hover { background: rgba(110, 231, 183, 0.1); color: #fff; }
.nav .lang { border: 1px solid rgba(110, 231, 183, 0.35); margin-left: 0.25rem; }
@media (max-width: 760px) { .nav .hide-sm { display: none; } .wordmark small { display: none; } }

/* Boutons */
.btn { position: relative; overflow: hidden; display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; min-height: 48px; padding: 0.75rem 1.4rem; border-radius: 12px; font-weight: 700; text-decoration: none; transition: transform 0.2s, box-shadow 0.25s, background-color 0.2s, filter 0.2s; translate: var(--bx, 0px) var(--by, 0px); }
.btn:hover { transform: translateY(-1px); }
.btn-mint { color: #04140d; background-image: linear-gradient(120deg, #6ee7b7 0%, #34d399 50%, #22d3ee 100%); box-shadow: 0 0 0 1px rgba(167, 243, 208, 0.4), 0 10px 30px -8px rgba(16, 185, 129, 0.7), 0 0 40px -10px rgba(34, 211, 238, 0.6); }
.btn-mint:hover { color: #04140d; filter: brightness(1.08) saturate(1.1); }
.btn-mint::after { content: ""; position: absolute; inset: 0; width: 40%; background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent); transform: translateX(-120%) skewX(-20deg); }
.btn-mint:hover::after { animation: sheen 900ms ease-out; }
.btn-line { border: 1.5px solid rgba(110, 231, 183, 0.45); color: #fff; background: rgba(110, 231, 183, 0.05); }
.btn-line:hover { background: rgba(110, 231, 183, 0.12); color: #fff; box-shadow: 0 0 30px -10px rgba(110, 231, 183, 0.6); }
.btn-green { color: #fff; background-image: linear-gradient(120deg, #11663f, #0f8a5a); box-shadow: 0 10px 24px -12px rgba(17, 102, 63, 0.8); }
.btn-green:hover { color: #fff; filter: brightness(1.1); }

/* Petit libellé au-dessus des titres. */
.eyebrow { display: inline-flex; align-items: center; gap: 0.55rem; padding: 0.35rem 0.8rem; border-radius: 999px; border: 1px solid var(--line); background: rgba(110, 231, 183, 0.06); font-family: "Space Grotesk", sans-serif; font-weight: 600; font-size: 0.78rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--mint); }
.eyebrow::before { content: ""; width: 0.45rem; height: 0.45rem; border-radius: 50%; background: var(--gold); box-shadow: 0 0 10px var(--gold); }

/* Héros */
.hero { position: relative; overflow: hidden; isolation: isolate; border-bottom: 1px solid var(--line); }
.hero .wrap { padding-top: 5rem; padding-bottom: 6rem; display: grid; gap: 3.5rem; align-items: center; }
@media (min-width: 940px) { .hero .wrap { grid-template-columns: 1.3fr 1fr; padding-top: 6.5rem; padding-bottom: 8rem; } }
.hero h1 { font-size: clamp(2.4rem, 5.6vw, 4.4rem); margin-top: 1.25rem; }
.hero h1 em { font-style: normal; background-image: linear-gradient(90deg, #6ee7b7, #22d3ee, #e0a93b, #6ee7b7); background-size: 200% 100%; -webkit-background-clip: text; background-clip: text; color: transparent; animation: shimmer 6s linear infinite; }
.hero .lead { margin-top: 1.5rem; max-width: 38rem; font-size: 1.18rem; color: var(--text-soft); }
.actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 2.2rem; }
.word { display: inline-block; animation: word-in 720ms cubic-bezier(0.22, 1, 0.36, 1) backwards; }
.hero-floor { position: absolute; left: -25%; right: -25%; bottom: -10%; height: 70%; z-index: -1; pointer-events: none;
  background: linear-gradient(to right, rgba(110, 231, 183, 0.3) 1px, transparent 1px) 0 0 / 64px 64px, linear-gradient(to bottom, rgba(110, 231, 183, 0.3) 1px, transparent 1px) 0 0 / 64px 64px;
  transform: perspective(520px) rotateX(62deg); transform-origin: 50% 100%;
  -webkit-mask-image: linear-gradient(to top, #000 10%, transparent 85%); mask-image: linear-gradient(to top, #000 10%, transparent 85%); }
.orb { position: absolute; z-index: -1; border-radius: 50%; filter: blur(60px); pointer-events: none; }
.orb-a { width: 420px; height: 420px; left: -140px; top: 5%; background: rgba(16, 185, 129, 0.35); animation: float 14s ease-in-out infinite; }
.orb-b { width: 360px; height: 360px; right: -100px; top: 30%; background: rgba(34, 211, 238, 0.25); animation: float 17s ease-in-out infinite reverse; }
.orb-c { width: 220px; height: 220px; left: 45%; bottom: -60px; background: rgba(224, 169, 59, 0.2); animation: float 12s ease-in-out infinite; }

/* Logo du héros : anneaux en orbite et badges qui flottent. */
.hero-mark { position: relative; justify-self: center; width: min(19rem, 64vw); aspect-ratio: 1; display: grid; place-items: center; }
.hero-mark img { width: 72%; height: auto; filter: drop-shadow(0 30px 50px rgba(0, 0, 0, 0.6)) drop-shadow(0 0 50px rgba(110, 231, 183, 0.35)); animation: float 7s ease-in-out infinite; }
.ring { position: absolute; inset: 0; border-radius: 50%; border: 1px solid rgba(110, 231, 183, 0.28); }
.ring::after { content: ""; position: absolute; top: -5px; left: 50%; width: 10px; height: 10px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 14px var(--mint); }
.ring-1 { animation: spin 22s linear infinite; }
.ring-2 { inset: -12%; border-color: rgba(34, 211, 238, 0.18); animation: spin 34s linear infinite reverse; }
.ring-2::after { background: var(--gold); box-shadow: 0 0 14px var(--gold); }
.badge { position: absolute; padding: 0.4rem 0.8rem; border-radius: 999px; border: 1px solid rgba(110, 231, 183, 0.35); background: rgba(8, 20, 26, 0.9); color: #d7f5e9; font-size: 0.85rem; font-weight: 600; white-space: nowrap; box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.7); animation: float 6s ease-in-out infinite; }
.badge-1 { top: 4%; left: -10%; }
.badge-2 { bottom: 12%; right: -14%; animation-delay: -2s; }
.badge-3 { bottom: -4%; left: 4%; animation-delay: -4s; }
@media (max-width: 520px) { .badge-1 { left: -4%; } .badge-2 { right: -4%; } }

/* Bandeau défilant */
.ticker { border-bottom: 1px solid var(--line); padding: 1.1rem 0; background: rgba(6, 13, 18, 0.6); }
.marquee { display: flex; overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee-track { display: flex; flex-shrink: 0; gap: 0.75rem; padding-right: 0.75rem; animation: marquee 40s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-item { display: inline-flex; align-items: center; gap: 0.6rem; white-space: nowrap; padding: 0.5rem 1rem; border-radius: 999px; border: 1px solid var(--line); background: rgba(110, 231, 183, 0.05); color: #cfe7de; font-weight: 500; font-size: 0.95rem; }
.marquee-item::before { content: ""; width: 0.4rem; height: 0.4rem; border-radius: 50%; background: var(--mint); box-shadow: 0 0 8px var(--mint); }

/* Sections */
.section { position: relative; padding: 5.5rem 0; }
.section h2 { font-size: clamp(2rem, 3.8vw, 2.9rem); margin-top: 1rem; }
.section .intro { margin-top: 1rem; max-width: 42rem; color: var(--text-soft); font-size: 1.1rem; }

/* Bande claire : papier menthe givré, grille fine. Les composants passent en version claire. */
.band-light { background:
    linear-gradient(to right, rgba(17, 102, 63, 0.06) 1px, transparent 1px) 0 0 / 40px 40px,
    linear-gradient(to bottom, rgba(17, 102, 63, 0.06) 1px, transparent 1px) 0 0 / 40px 40px,
    linear-gradient(180deg, var(--paper), var(--paper-2));
  color: var(--ink); border-top: 1px solid rgba(110, 231, 183, 0.5); box-shadow: inset 0 18px 30px -24px rgba(16, 185, 129, 0.5); }
.band-light h2, .band-light h3 { color: var(--ink); }
.band-light .intro { color: var(--ink-soft); }
.band-light .eyebrow { color: var(--green); border-color: rgba(17, 102, 63, 0.25); background: rgba(17, 102, 63, 0.06); }
.band-light a:not(.btn) { color: var(--green); }
.band-light :focus-visible { outline-color: var(--green); }

/* Produits */
.products { display: grid; gap: 1.5rem; margin-top: 2.75rem; }
@media (min-width: 880px) { .products { grid-template-columns: 1fr 1fr; } }
.product { position: relative; display: flex; flex-direction: column; gap: 1rem; padding: 2rem; border-radius: 22px; background: #fff; border: 1px solid rgba(17, 102, 63, 0.14);
  box-shadow: 0 1px 2px rgba(11, 22, 29, 0.05), 0 22px 44px -26px rgba(11, 22, 29, 0.35); transition: translate 0.3s, box-shadow 0.3s, border-color 0.3s; overflow: hidden; }
.product::before { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity 0.3s;
  background: radial-gradient(380px circle at var(--px, 50%) var(--py, 50%), rgba(16, 185, 129, 0.1), transparent 60%); }
.product::after { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; background: linear-gradient(90deg, var(--mint), var(--cyan), var(--gold)); }
.product:hover { translate: 0 -4px; border-color: rgba(16, 185, 129, 0.45); box-shadow: 0 2px 4px rgba(11, 22, 29, 0.06), 0 28px 50px -24px rgba(16, 185, 129, 0.55); }
.product:hover::before { opacity: 1; }
.product-head { display: flex; align-items: center; gap: 0.9rem; }
.product-head img { width: 52px; height: 52px; }
.product h3 { font-size: 1.65rem; }
.product .tag { font-size: 0.92rem; color: #4b5f66; margin-top: 0.15rem; }
.product ul { margin: 0.25rem 0 0; padding: 0; list-style: none; display: grid; gap: 0.55rem; }
.product li { display: flex; gap: 0.65rem; color: var(--ink-soft); }
.product li::before { content: ""; flex: none; width: 0.55rem; height: 0.55rem; margin-top: 0.55rem; border-radius: 3px; background: linear-gradient(135deg, var(--emerald), var(--cyan)); }
.product .btn { margin-top: auto; align-self: flex-start; }
.gs-word { font-family: "Fraunces", Georgia, serif; font-weight: 800; color: var(--green); }
.st-word span { color: #254bc0; }

/* Approche : cartes de verre qui s'illuminent. */
.principles { display: grid; gap: 1.25rem; margin: 2.75rem 0 0; padding: 0; list-style: none; }
@media (min-width: 720px) { .principles { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1060px) { .principles { grid-template-columns: repeat(4, 1fr); } }
.principle { position: relative; border: 1px solid var(--line); border-radius: 18px; padding: 1.6rem; background: var(--glass); box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), 0 18px 40px -24px rgba(0, 0, 0, 0.8); transition: translate 0.3s, border-color 0.3s, box-shadow 0.3s; }
.principle:hover { translate: 0 -4px; border-color: rgba(110, 231, 183, 0.5); box-shadow: 0 0 0 1px rgba(110, 231, 183, 0.25), 0 24px 50px -20px rgba(16, 185, 129, 0.45); }
.principle .num { display: inline-block; font-family: "Space Grotesk", sans-serif; font-weight: 700; font-size: 1.1rem; background: linear-gradient(90deg, var(--gold), var(--mint)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.principle h3 { font-size: 1.22rem; margin-top: 0.6rem; }
.principle p { margin-top: 0.55rem; font-size: 0.98rem; color: var(--text-soft); }

/* À propos */
.about { display: grid; gap: 2.5rem; align-items: center; }
@media (min-width: 900px) { .about { grid-template-columns: 1.2fr 1fr; } }
.about .body { color: var(--ink-soft); font-size: 1.08rem; margin-top: 1.25rem; }
.about .body p + p { margin-top: 1rem; }
.quote { margin: 0; position: relative; padding: 2rem; border-radius: 20px; background: var(--slate); color: #fff; font-family: "Space Grotesk", sans-serif; font-weight: 600; font-size: 1.45rem; line-height: 1.35;
  box-shadow: 0 30px 60px -30px rgba(11, 22, 29, 0.8), 0 0 0 1px rgba(110, 231, 183, 0.2); }
.quote::before { content: ""; position: absolute; left: 0; top: 1.5rem; bottom: 1.5rem; width: 4px; border-radius: 4px; background: linear-gradient(var(--mint), var(--gold)); box-shadow: 0 0 14px rgba(110, 231, 183, 0.7); }

/* Contact : bloc lumineux à bordure en dégradé animée. */
.contact { display: flex; flex-wrap: wrap; gap: 1.5rem; align-items: center; justify-content: space-between; border-radius: 26px; padding: 2.75rem; color: var(--text-soft); }
.contact h2 { margin: 0; }
.contact p { margin-top: 0.6rem; }
.glow-ring { border: 2px solid transparent; background: linear-gradient(var(--slate-2), var(--slate-2)) padding-box, linear-gradient(120deg, #e0a93b, #6ee7b7, #22d3ee, #10b981, #e0a93b) border-box; background-size: 100% 100%, 300% 300%;
  box-shadow: 0 30px 80px -24px rgba(16, 185, 129, 0.45), 0 0 70px -24px rgba(34, 211, 238, 0.45); animation: glow-border 8s linear infinite; }

/* Pied de page */
.site-footer { background: #04090d; color: #94a3b8; font-size: 0.95rem; border-top: 1px solid var(--line); }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 1rem 2rem; align-items: center; justify-content: space-between; padding-top: 2rem; padding-bottom: 2rem; }
.site-footer a { color: #d3e3dd; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; }
.site-footer nav a { min-height: 44px; display: inline-flex; align-items: center; }

/* Pages de texte (confidentialité, 404) : bandeau sombre, texte sur fond clair. */
.page { padding: 0 0 5rem; }
.page .wrap { max-width: 48rem; }
.page-band { padding: 4rem 0 3rem; border-bottom: 1px solid var(--line); }
.page h1 { font-size: clamp(2.1rem, 4.2vw, 3rem); }
.page-body { padding-top: 3rem; }
.page h2 { font-size: 1.35rem; margin-top: 2.25rem; }
.page p, .page li { margin-top: 0.75rem; }
.updated { color: var(--text-soft); margin-top: 0.75rem; }

/* Apparition au défilement (navigateurs récents seulement). */
@supports (animation-timeline: view()) {
  .reveal { animation: rise-in linear backwards; animation-timeline: view(); animation-range: entry 0% cover 25%; }
}

@keyframes aurora { 0%, 100% { transform: translate3d(-6%, -4%, 0) rotate(0) scale(1); } 50% { transform: translate3d(5%, 4%, 0) rotate(12deg) scale(1.12); } }
@keyframes twinkle { from { opacity: 0.45; } to { opacity: 1; } }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes shimmer { to { background-position: 200% 50%; } }
@keyframes sheen { to { transform: translateX(260%) skewX(-20deg); } }
@keyframes marquee { to { transform: translateX(-100%); } }
@keyframes glow-border { to { background-position: 0 0, 300% 50%; } }
@keyframes word-in { from { opacity: 0; transform: translateY(0.45em); } }
@keyframes rise-in { from { opacity: 0; transform: translateY(18px); } }

/* Mouvement réduit : tout s'arrête, rien ne disparaît. */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}