/* Alto Infra — identité reprise d'altoinfra.cloud (branding/altoinfra-cloud) */

@font-face {
  font-family: "Inter";
  src: url("fonts/inter-latin-wght.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --bleu: #1616c5;
  --magenta: #de0cde;
  --mauve: #9031c4;
  --mauve-clair: #b46ae8;
  --degrade: linear-gradient(90deg, #1616c5 0%, #9031c4 55%, #de0cde 100%);
  --noir: #0a0a0a;
  --noir-2: #141415;
  --noir-3: #1d1d20;
  --gris-ligne: #2d2d2f;
  --gris-texte: #a3a3ab;
  --blanc: #f2f2f3;
  --rayon: 4px;
  --max: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  background: var(--noir);
  color: var(--blanc);
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a { color: var(--mauve-clair); text-decoration: none; }
a:hover { color: #fff; }

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 0.6em; font-weight: 650; }
h1 { font-size: clamp(2.4rem, 5.5vw, 4.2rem); }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }

.conteneur { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }

.degrade-texte {
  background: var(--degrade);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.surtitre {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mauve-clair);
  margin-bottom: 1rem;
}

.chapeau { font-size: 1.15rem; color: var(--gris-texte); max-width: 720px; }

/* Boutons */
.bouton {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.8em 1.5em;
  border-radius: var(--rayon);
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  border: 0;
  cursor: pointer;
  font-family: inherit;
}
.bouton-plein { background: var(--degrade); color: #fff; }
.bouton-plein:hover { color: #fff; transform: translateY(-1px); box-shadow: 0 8px 30px rgba(144, 49, 196, 0.45); }
.bouton-contour { border: 1px solid rgba(255, 255, 255, 0.6); color: #fff; }
.bouton-contour:hover { border-color: #fff; background: rgba(255, 255, 255, 0.06); }

/* En-tête */
.entete {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.entete .conteneur { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.entete .logo img { height: 38px; width: auto; }
.menu { display: flex; align-items: center; gap: 28px; }
.menu a { color: #d8d8dd; font-size: 0.92rem; font-weight: 500; }
.menu a:hover { color: #fff; }
.menu .bouton { padding: 0.6em 1.1em; color: #fff; }
.menu-bouton {
  display: none;
  background: none;
  border: 1px solid var(--gris-ligne);
  color: #fff;
  border-radius: var(--rayon);
  padding: 8px 12px;
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

/* Hero */
.hero {
  position: relative;
  min-height: clamp(560px, calc(100vh - 72px), 860px);
  min-height: clamp(560px, calc(100svh - 72px), 860px);
  display: flex;
  align-items: center;
  background:
    linear-gradient(90deg, rgba(10, 10, 10, 0.96) 0%, rgba(10, 10, 10, 0.75) 45%, rgba(10, 10, 10, 0.35) 100%),
    url("img/texture5-hero-accueil.jpg") center / cover no-repeat;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: var(--degrade);
}
.hero .conteneur { position: relative; padding-top: 80px; padding-bottom: 80px; }
.hero h1 { max-width: 820px; }
.hero .chapeau { margin-bottom: 2rem; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero .boite {
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  width: min(30vw, 360px);
  opacity: 0.9;
  filter: drop-shadow(0 0 60px rgba(144, 49, 196, 0.35));
}

/* Sections */
section { padding: 110px 0; }
.section-claire { background: var(--noir-2); }
.entete-section { max-width: 760px; margin-bottom: 56px; }

/* Piliers */
.piliers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--gris-ligne); border: 1px solid var(--gris-ligne); }
.pilier { background: var(--noir); padding: 40px 34px; }
.pilier .numero { font-size: 0.85rem; font-weight: 600; color: var(--mauve-clair); letter-spacing: 0.1em; }
.pilier h3 { margin-top: 18px; font-size: 1.45rem; }
.pilier p { color: var(--gris-texte); margin: 0; }

/* Cartes de services : la « boîte mauve sur fond noir » */
.cartes { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 24px; }
.carte {
  position: relative;
  background: var(--noir);
  padding: 34px 30px 30px;
  border-radius: var(--rayon);
  border: 1px solid transparent;
  background-clip: padding-box;
  transition: transform 0.2s ease;
}
.carte::before {
  content: "";
  position: absolute;
  inset: -1px;
  z-index: -1;
  border-radius: calc(var(--rayon) + 1px);
  background: var(--degrade);
  opacity: 0.55;
  transition: opacity 0.2s ease;
}
.carte:hover { transform: translateY(-3px); }
.carte:hover::before { opacity: 1; }
.cartes { isolation: isolate; }
.carte .icone {
  width: 44px;
  height: 44px;
  border: 3px solid;
  border-image: var(--degrade) 1;
  display: grid;
  place-items: center;
  margin-bottom: 22px;
}
.carte .icone svg { width: 22px; height: 22px; stroke: var(--mauve-clair); }
.carte p { color: var(--gris-texte); }
.carte ul { margin: 0; padding: 0; list-style: none; color: #cfcfd6; font-size: 0.95rem; }
.carte li { padding: 6px 0 6px 20px; position: relative; border-top: 1px solid var(--gris-ligne); }
.carte li::before { content: ""; position: absolute; left: 0; top: 15px; width: 8px; height: 8px; background: var(--degrade); }

/* Bandeau texture */
.bandeau {
  background:
    linear-gradient(180deg, rgba(10, 10, 10, 0.85), rgba(10, 10, 10, 0.92)),
    url("img/texture1-hpc.jpg") center / cover no-repeat;
}
.chiffres { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; margin-top: 56px; }
.chiffre strong { display: inline-block; font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 700; line-height: 1.1; }
.chiffre span { display: block; color: var(--gris-texte); font-size: 0.95rem; }

/* Approche */
.deux-colonnes { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.environnements { display: grid; gap: 14px; }
.environnement { display: grid; grid-template-columns: 52px 1fr; gap: 18px; align-items: start; padding: 20px; border: 1px solid var(--gris-ligne); border-radius: var(--rayon); background: var(--noir); }
.environnement .boite-mini { width: 52px; height: 52px; border: 3px solid; border-image: var(--degrade) 1; display: grid; place-items: center; font-weight: 700; font-size: 0.95rem; }
.environnement h3 { margin: 0 0 4px; font-size: 1.05rem; }
.environnement p { margin: 0; color: var(--gris-texte); font-size: 0.95rem; }

/* Technologies */
.technos { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.techno { border-top: 2px solid; border-image: var(--degrade) 1; padding-top: 22px; }
.techno p { color: var(--gris-texte); font-size: 0.95rem; }
.applications { margin-top: 56px; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.applications .libelle { color: var(--gris-texte); margin-right: 8px; }
.puce { border: 1px solid var(--gris-ligne); border-radius: 999px; padding: 6px 14px; font-size: 0.9rem; color: #dcdce2; }

/* À propos */
.apropos p { color: #cfcfd6; }
.clients { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.citation {
  border-left: 3px solid;
  border-image: var(--degrade) 1;
  padding: 6px 0 6px 24px;
  font-size: 1.25rem;
  line-height: 1.5;
  color: #fff;
  margin: 0 0 28px;
}

/* Contact */
.contact { background: var(--noir-2); }
.coordonnees { display: grid; gap: 22px; }
.coordonnee span { display: block; font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--gris-texte); }
.coordonnee a, .coordonnee strong { font-size: 1.2rem; font-weight: 600; color: #fff; }
form { display: grid; gap: 16px; }
.champ label { display: block; font-size: 0.88rem; font-weight: 500; margin-bottom: 6px; color: #d8d8dd; }
.champ input, .champ textarea {
  width: 100%;
  background: var(--noir);
  border: 1px solid var(--gris-ligne);
  border-radius: var(--rayon);
  color: #fff;
  font: inherit;
  font-size: 1rem;
  padding: 12px 14px;
}
.champ input:focus, .champ textarea:focus { outline: none; border-color: var(--mauve); box-shadow: 0 0 0 3px rgba(144, 49, 196, 0.25); }
.champ textarea { min-height: 140px; resize: vertical; }
.deux-champs { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.piege { position: absolute; left: -9999px; }
.erreur-captcha { color: #ff7ab6; font-size: 0.9rem; min-height: 1.2em; margin: 0; }

/* Pied de page */
.pied { border-top: 1px solid var(--gris-ligne); padding: 40px 0; color: var(--gris-texte); font-size: 0.9rem; }
.pied .conteneur { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
.pied img { height: 30px; width: auto; }

/* Pages simples (merci, 404) */
.page-simple { min-height: 100vh; display: grid; place-items: center; text-align: center; padding: 40px 24px;
  background: linear-gradient(180deg, rgba(10,10,10,0.9), rgba(10,10,10,0.97)), url("img/texture3-crm.jpg") center / cover; }
.page-simple .boite { width: 120px; margin: 0 auto 36px; }
.page-simple p { color: #cfcfd6; }
.page-simple .en { color: var(--gris-texte); }

/* Apparition au défilement (désactivée si l'utilisateur réduit les animations) */
.apparait { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
.apparait.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .apparait { opacity: 1; transform: none; transition: none; }
}

/* Tablette */
@media (max-width: 960px) {
  .piliers, .deux-colonnes { grid-template-columns: 1fr; }
  .technos, .chiffres { grid-template-columns: repeat(2, 1fr); }
  .hero .boite { display: none; }
  .deux-colonnes { gap: 48px; }
}

/* Téléphone */
@media (max-width: 760px) {
  body { font-size: 16px; }
  section { padding: 76px 0; }
  .conteneur { padding: 0 16px; }
  .menu-bouton { display: block; }
  .menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--noir);
    border-bottom: 1px solid var(--gris-ligne);
    padding: 8px 16px 16px;
  }
  .menu.ouvert { display: flex; }
  .menu a { padding: 12px 0; border-bottom: 1px solid var(--gris-ligne); }
  .menu .bouton { margin-top: 12px; justify-content: center; border-bottom: 0; }
  .technos, .chiffres, .deux-champs { grid-template-columns: 1fr; }
  .cartes { grid-template-columns: 1fr; }
  .pilier { padding: 30px 22px; }
}