:root{
  --ink:#0f2a44;
  --sand:#faf7f4;
  --white:#ffffff;
  --ember:#ff7a18;
  --ember2:#ff9a3c;

  --border: rgba(15,42,68,.12);
  --shadow: 0 16px 40px rgba(15, 42, 68, .10);

  --radius: 16px;
  --radius-sm: 12px;
  --max: 1100px;

  --muted: rgba(15,42,68,.72);
}

:root.dark{
  --ink:#e8f0ff;
  --sand:#192844;
  --white:#304c7c;
  --border: rgba(232,240,255,.12);
  --shadow: 0 20px 50px rgba(0, 0, 0, .45);
  --muted: rgba(232,240,255,.70);
}

*{ box-sizing:border-box; }
html, body{ height:100%; }
body{
  margin:0;
  font-family: "Poppins", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--sand);
  color: var(--ink);
}

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

.muted{ color: var(--muted); }

/* Header */
.header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--white) 92%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 18px;
  padding: 18px 0;
}
.logo{
  text-decoration:none;
  font-weight: 800;
  letter-spacing: .5px;
  font-size: 22px;
  white-space: nowrap;
}
.logo__accent{ color: var(--ember); }
.logo__ink{ color: var(--ink); }

.nav{
  display:flex;
  gap: 26px;
  align-items:center;
}
.nav__link{
  text-decoration:none;
  color: var(--ink);
  font-weight: 600;
  opacity: .9;
  position: relative;
  transition: opacity .15s ease;
}
.nav__link:hover{ opacity:1; }
.nav__link.is-active{
  color: var(--ember);
  opacity: 1;
}
.nav__link.is-active::after{
  content:"";
  position:absolute;
  left:0; right:0;
  bottom:-10px;
  height:2px;
  background: var(--ember);
  border-radius: 999px;
}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 12px 18px;
  border-radius: 14px;
  font-weight: 800;
  font-size: 14px;
  text-decoration:none;
  border: 0;
  cursor:pointer;
  transition: transform .12s ease, opacity .12s ease, box-shadow .12s ease, background .12s ease;
  user-select: none;
}
.btn:active{ transform: translateY(1px); }
.btn--primary{
  color: #fff;
  background: linear-gradient(90deg, var(--ember), var(--ember2));
  box-shadow: var(--shadow);
}
.btn--primary:hover{ opacity: .96; }
.btn--ghost{
  background: color-mix(in oklab, var(--white) 75%, transparent);
  border: 1px solid var(--border);
  color: var(--ink);
}
.btn--ghost:hover{ background: var(--white); }
.btn--icon{
  padding: 12px 14px;
  border-radius: 14px;
}

/* Sections */
.section{ padding: 56px 0; }

.hero{ padding: 54px 0 28px; }
.hero__grid{
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 36px;
  align-items: center;
}
.kicker{
  color: var(--ember);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: 12px;
}
.h1{
  font-size: 36px;
  line-height: 1.02;
  margin: 14px 0 16px;
}
.lead{
  font-size: 18px;
  color: var(--muted);
  max-width: 58ch;
}
.hero__actions{
  display:flex;
  gap: 12px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.panel{
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
}

.grid3{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

/* Cards + animations */
.card{
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 10px 24px rgba(15,42,68,.06);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
  will-change: transform;
}
:root.dark .card{ box-shadow: 0 10px 30px rgba(0,0,0,.35); }

.card:hover{
  transform: translateY(-4px);
  box-shadow: 0 18px 44px rgba(15,42,68,.12);
  border-color: color-mix(in oklab, var(--ember) 30%, var(--border));
}
.card__title{
  font-weight: 900;
  margin: 0 0 8px;
}

/* Page title */
.page-title{ padding: 44px 0 10px; }
.page-title h1{
  font-size: 52px;
  margin: 0;
  letter-spacing: .5px;
}

/* Contact */
.contact{ padding: 28px 0 60px; }
.contact__grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items:start;
}
.form h2{ color: var(--ember); margin: 0 0 6px; }

.field{ margin: 12px 0; }
.input, .textarea, .select{
  width: 100%;
  padding: 14px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--white) 90%, transparent);
  font-family: inherit;
  font-size: 14px;
  color: var(--ink);
  outline: none;
  transition: box-shadow .12s ease, border-color .12s ease;
}
.input:focus, .textarea:focus, .select:focus{
  border-color: rgba(255,122,24,.55);
  box-shadow: 0 0 0 4px rgba(255,122,24,.12);
}
.textarea{ min-height: 130px; resize: vertical; }

.info-line{
  display:flex;
  gap: 12px;
  align-items:flex-start;
  margin: 12px 0;
}
.icon{
  width: 36px; height: 36px;
  border-radius: 12px;
  background: rgba(255,122,24,.12);
  display:flex;
  align-items:center;
  justify-content:center;
  color: var(--ember);
  font-weight: 900;
}

.map{
  margin-top: 16px;
  height: 240px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow:hidden;
  background: color-mix(in oklab, var(--white) 92%, transparent);
}

/* Footer */
.footer{
  border-top: 1px solid var(--border);
  background: color-mix(in oklab, var(--white) 85%, transparent);
}
.footer__inner{
  display:grid;
  grid-template-columns: 1fr auto auto;
  gap: 18px;
  align-items:center;
  padding: 22px 0;
}
.footer__brand{ font-weight: 900; }
.footer__links{ display:flex; gap: 14px; }
.footer__links a{
  text-decoration:none;
  color: var(--ink);
  opacity: .75;
  font-weight: 700;
}
.footer__links a:hover{ opacity: 1; }
.footer__copy{ text-align:right; color: var(--muted); }

/* Responsive */
@media (max-width: 920px){
  .hero__grid, .contact__grid { grid-template-columns: 1fr; }
  .grid3 { grid-template-columns: 1fr; }
  .header__cta{ display:none; }
  .h1{ font-size: 44px; }
  .page-title h1{ font-size: 42px; }
}

/* Éléments utilisés par la navigation responsive — invisibles sur ordinateur */
.header__actions{
  display:flex;
  gap:10px;
  align-items:center;
}
.nav-toggle,
.theme-toggle__mobile{
  display:none;
}

/* Navigation compacte pour tablettes et petits écrans, sans modifier le rendu PC */
@media (max-width: 1000px){
  .header__inner{
    position:relative;
  }

  .nav-toggle{
    display:flex;
    order:3;
    width:46px;
    height:46px;
    padding:0 12px;
    border:1px solid var(--border);
    border-radius:14px;
    background:color-mix(in oklab, var(--white) 75%, transparent);
    align-items:center;
    justify-content:center;
    flex-direction:column;
    gap:5px;
    cursor:pointer;
    color:var(--ink);
  }
  .nav-toggle span{
    display:block;
    width:20px;
    height:2px;
    border-radius:999px;
    background:currentColor;
    transition:transform .18s ease, opacity .18s ease;
  }
  .nav-toggle.is-open span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
  .nav-toggle.is-open span:nth-child(2){ opacity:0; }
  .nav-toggle.is-open span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

  .nav{
    display:none;
    position:absolute;
    top:calc(100% + 1px);
    left:0;
    right:0;
    padding:12px 24px 18px;
    background:var(--white);
    border-bottom:1px solid var(--border);
    box-shadow:0 18px 30px rgba(15,42,68,.12);
    flex-direction:column;
    align-items:stretch;
    gap:4px;
  }
  :root.dark .nav{ box-shadow:0 18px 30px rgba(0,0,0,.35); }
  .nav.is-open{ display:flex; }
  .nav__link{
    display:block;
    padding:12px 10px;
    border-radius:10px;
  }
  .nav__link:hover{
    background:color-mix(in oklab, var(--ember) 8%, transparent);
  }
  .nav__link.is-active::after{
    left:10px;
    right:auto;
    bottom:5px;
    width:34px;
  }

  .logo{ order:1; }
  .header__actions{
    order:2;
    margin-left:auto;
  }
}

@media (max-width: 920px){
  body{ overflow-x:hidden; }

  .wrap{ padding-left:20px; padding-right:20px; }
  .section{ padding:42px 0; }
  .hero{ padding:38px 0 22px; }
  .page-title{ padding:34px 0 6px; }

  .hero__grid,
  .contact__grid,
  .formation-layout{
    grid-template-columns:1fr !important;
  }
  .hero__grid{ gap:24px; }
  .contact__grid{ gap:20px; }
  .grid3{ grid-template-columns:1fr; }
  .grid3 > *{ grid-column:auto !important; }

  .h1{
    font-size:36px;
    line-height:1.12;
  }
  .h1 br + br{ display:none; }
  .page-title h1{
    font-size:38px;
    line-height:1.08;
    overflow-wrap:anywhere;
  }
  .lead{ font-size:17px; }
  .hero__lead{ margin-top:28px !important; }

  .hero__features{
    grid-template-columns:1fr !important;
  }
  .hero__features img{
    max-height:none !important;
    aspect-ratio:16 / 9;
  }

  .formation-visual{
    position:static !important;
    top:auto !important;
    width:100%;
    max-width:620px;
    margin:0 auto;
    padding:0 !important;
  }
  .formation-image{
    display:block;
    width:100% !important;
    max-width:100%;
    height:auto;
    transform:none !important;
  }
  .domain-image{ height:auto; }

  .footer__inner{
    grid-template-columns:1fr;
    align-items:start;
  }
  .footer__links{
    flex-wrap:wrap;
  }
  .footer__copy{ text-align:left; }

  .info-line > div:last-child,
  .muted{
    min-width:0;
    overflow-wrap:anywhere;
  }

  .map,
  .map iframe{
    width:100%;
    max-width:100%;
  }
}

@media (max-width: 600px){
  .wrap{ padding-left:16px; padding-right:16px; }
  .header__inner{
    gap:8px;
    padding:12px 0;
  }
  .logo{
    font-size:18px;
    letter-spacing:.25px;
  }
  .header__actions{ gap:6px; }
  .header__cta{ display:none; }
  .theme-toggle{
    width:42px;
    height:42px;
    padding:0;
    border-radius:12px;
    font-size:20px;
  }
  .theme-toggle__desktop{ display:none; }
  .theme-toggle__mobile{ display:inline; }
  .nav-toggle{
    width:42px;
    height:42px;
    border-radius:12px;
  }
  .nav{
    padding-left:16px;
    padding-right:16px;
  }

  .section{ padding:34px 0; }
  .hero{ padding-top:30px; }
  .page-title h1{ font-size:31px; }
  .h1{ font-size:30px; }
  .lead{ font-size:16px; }
  .panel{ padding:18px; }
  .card{ padding:16px; }

  .hero__actions,
  .panel > div[style*="display:flex"]{
    align-items:stretch;
  }
  .hero__actions .btn{
    flex:1 1 100%;
  }

  .form .btn[type="submit"]{
    width:100%;
  }

  .footer__links{
    flex-direction:column;
    gap:8px;
  }
}

@media (max-width: 360px){
  .logo{ font-size:16px; }
  .theme-toggle,
  .nav-toggle{
    width:38px;
    height:38px;
  }
  .page-title h1{ font-size:27px; }
  .h1{ font-size:27px; }
}