/* Site STELMO — couleurs et polices de la charte (charte/couleurs.css). */
:root {
  --graphite: #14161B;
  --craie: #F3F3F0;
  --gris: #8A8F98;
  --petrole: #0B3A4A;
  --cyan: #2BB8CF;
  --cyan-texte: #1A93A8;
  --glacier: #BDEBF2;
  --corail: #FF5A36;
  --corail-texte: #D63A1C;
  --peche: #FFB199;
  --degrade-apps: linear-gradient(135deg, #FF7A45 0%, #FF3D5A 100%);

  --texte: #14161B;
  --discret: #5B606A;
  --ligne: #E2E0DA;
  --surface: #FFFFFF;

  --titres: "Clash Display", system-ui, sans-serif;
  --corps: Satoshi, system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--craie);
  color: var(--texte);
  font: 17px/1.6 var(--corps);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 760px) { .wrap { padding: 0 32px; } }

h1, h2, h3 { font-family: var(--titres); letter-spacing: -.015em; margin: 0; }
h1 { font-weight: 600; font-size: clamp(38px, 6.4vw, 72px); line-height: 1.02; }
h2 { font-weight: 600; font-size: clamp(30px, 4vw, 44px); line-height: 1.05; }
h3 { font-weight: 600; font-size: 22px; line-height: 1.2; }
.surtitre {
  font-size: 12px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase;
  color: var(--discret); margin: 0 0 12px;
}

/* En-tête */
.entete { position: absolute; inset: 0 0 auto; z-index: 2; }
.entete .wrap { display: flex; align-items: center; justify-content: space-between; height: 80px; }
.entete img { height: 26px; width: auto; }
.entete nav { display: flex; align-items: center; gap: 24px; font-size: 15px; font-weight: 500; }
.entete nav a { text-decoration: none; color: var(--craie); opacity: .8; }
.entete nav a:hover { opacity: 1; }
@media (max-width: 640px) { .entete nav a:not(.bouton) { display: none; } }

.bouton {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 999px;
  font-weight: 700; font-size: 15px; text-decoration: none;
  background: var(--craie); color: var(--graphite);
  transition: transform .15s ease;
}
.bouton:hover { transform: translateY(-1px); }
.entete .bouton { padding: 9px 18px; opacity: 1; color: var(--graphite); }
.bouton.contour { background: transparent; color: var(--craie); box-shadow: inset 0 0 0 1px #ffffff40; }

/* Accueil */
.hero {
  background: var(--graphite); color: var(--craie);
  padding: 168px 0 112px; position: relative; overflow: hidden;
}
.hero::before, .hero::after {
  content: ""; position: absolute; border-radius: 50%; pointer-events: none;
}
.hero::before {
  width: 640px; height: 640px; right: -200px; top: -260px;
  background: radial-gradient(circle, var(--corail) 0%, transparent 65%); opacity: .28;
}
.hero::after {
  width: 600px; height: 600px; left: -240px; bottom: -360px;
  background: radial-gradient(circle, var(--cyan) 0%, transparent 65%); opacity: .24;
}
.hero .wrap { position: relative; z-index: 1; }
.hero h1 { max-width: 880px; }
.hero h1 em { font-style: normal; color: var(--gris); }
.hero p { max-width: 620px; font-size: 19px; opacity: .78; margin: 24px 0 36px; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* Sections */
section { padding: 96px 0; }
.intro { max-width: 640px; color: var(--discret); margin: 16px 0 48px; }

/* Activités */
.activites { display: grid; gap: 20px; grid-template-columns: 1fr; }
@media (min-width: 860px) { .activites { grid-template-columns: 1fr 1fr; } }
.carte {
  border-radius: 24px; padding: 40px 32px; color: var(--craie);
  position: relative; overflow: hidden; display: flex; flex-direction: column;
}
@media (min-width: 760px) { .carte { padding: 48px 44px; } }
.carte.consulting { background: var(--petrole); }
.carte.apps { background: var(--graphite); }
.carte.apps::before {
  content: ""; position: absolute; width: 420px; height: 420px; right: -180px; top: -200px;
  border-radius: 50%; background: radial-gradient(circle, var(--corail) 0%, transparent 65%); opacity: .35;
}
.carte.consulting::before {
  content: ""; position: absolute; width: 420px; height: 420px; right: -180px; top: -200px;
  border-radius: 50%; background: radial-gradient(circle, var(--cyan) 0%, transparent 65%); opacity: .3;
}
.carte > * { position: relative; }
.carte .logo { height: 40px; width: auto; margin-bottom: 36px; }
.carte h3 { font-size: 28px; margin-bottom: 12px; }
.carte p { opacity: .8; margin: 0 0 28px; }
.carte ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.carte li { display: flex; gap: 12px; align-items: baseline; }
.carte li::before {
  content: ""; flex: none; width: 10px; height: 10px; border-radius: 3px; transform: translateY(1px);
}
.carte.consulting li::before { background: var(--cyan); }
.carte.apps li::before { background: var(--degrade-apps); }

/* Méthode */
.methode { background: var(--surface); border-block: 1px solid var(--ligne); }
.etapes { display: grid; gap: 32px; grid-template-columns: 1fr; counter-reset: etape; }
@media (min-width: 760px) { .etapes { grid-template-columns: repeat(2, 1fr); } }
.etape { counter-increment: etape; border-top: 2px solid var(--graphite); padding-top: 20px; }
.etape::before {
  content: "0" counter(etape); display: block;
  font: 600 15px/1 var(--titres); color: var(--discret); margin-bottom: 20px;
}
.etape h3 { margin-bottom: 8px; }
.etape p { color: var(--discret); margin: 0; }

/* À propos */
.apropos { display: grid; gap: 40px; grid-template-columns: 1fr; align-items: start; }
@media (min-width: 860px) { .apropos { grid-template-columns: 5fr 7fr; gap: 64px; } }
.apropos .texte p { margin: 0 0 16px; }
.apropos .texte p:last-child { margin-bottom: 0; }
.chiffres { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 32px; }
.chiffres div { background: var(--surface); border: 1px solid var(--ligne); border-radius: 16px; padding: 20px; }
.chiffres strong { display: block; font: 600 22px/1.2 var(--titres); margin-bottom: 4px; }
.chiffres span { color: var(--discret); font-size: 15px; }

/* Contact */
.contact { background: var(--graphite); color: var(--craie); position: relative; overflow: hidden; }
.contact::after {
  content: ""; position: absolute; width: 560px; height: 560px; right: -200px; bottom: -320px;
  border-radius: 50%; background: radial-gradient(circle, var(--cyan) 0%, transparent 65%); opacity: .2;
}
.contact .wrap { position: relative; z-index: 1; }
.contact .surtitre, .contact .intro { color: #ffffffa6; }
.coordonnees { display: grid; gap: 12px; grid-template-columns: 1fr; max-width: 820px; }
@media (min-width: 760px) { .coordonnees { grid-template-columns: repeat(2, 1fr); } }
.coordonnees a, .coordonnees div {
  display: block; text-decoration: none; padding: 22px 24px; border-radius: 16px;
  box-shadow: inset 0 0 0 1px #ffffff26;
}
.coordonnees a:hover { box-shadow: inset 0 0 0 1px #ffffff80; }
.coordonnees small {
  display: block; font-size: 12px; letter-spacing: .14em; text-transform: uppercase;
  opacity: .6; font-weight: 700; margin-bottom: 6px;
}
.coordonnees strong { font-weight: 500; overflow-wrap: anywhere; }

/* Pied de page */
.pied { background: var(--graphite); color: #ffffff8c; font-size: 14px; border-top: 1px solid #ffffff14; }
.pied .wrap { display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; padding-block: 28px; }

/* Page de texte (mentions légales) */
.page-texte .hero { padding: 152px 0 64px; }
.page-texte main { max-width: 760px; }
.page-texte main h2 { font-size: 26px; margin: 48px 0 12px; }
.page-texte main p { margin: 0 0 12px; }
.page-texte section { padding: 56px 0 96px; }
.page-texte main h2:first-child { margin-top: 0; }