/* ===== CastiQ — charte graphique ===== */
:root{
  --bleu:#0F284E;        /* navy Cronomix (logo) — primaire */
  --bleu-clair:#1C3E6E;
  --orange:#2F6FB0;      /* accent azur (CTA) — famille bleue de la marque */
  --orange-fonce:#255C95;
  --gris-bg:#F2F4F7;
  --gris-bord:#dfe4ea;
  --gris-txt:#5b6573;
  --noir:#0F284E;
  --blanc:#ffffff;
  --vert:#1e9e6a;
  --ombre:0 8px 30px rgba(15,40,78,.12);
  --ombre-soft:0 2px 10px rgba(15,40,78,.08);
  --radius:14px;
  --max:1180px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter','Segoe UI',system-ui,-apple-system,sans-serif;
  color:var(--noir);
  background:var(--blanc);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{line-height:1.15;color:var(--bleu);font-weight:800;letter-spacing:-.02em}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section--gris{background:var(--gris-bg)}
.center{text-align:center}
.muted{color:var(--gris-txt)}
.eyebrow{
  color:var(--orange-fonce);font-weight:700;text-transform:uppercase;
  letter-spacing:.12em;font-size:.8rem;margin-bottom:10px;display:block
}

/* ===== Boutons ===== */
.btn{
  display:inline-flex;align-items:center;gap:8px;justify-content:center;
  padding:14px 26px;border-radius:10px;font-weight:700;font-size:1rem;
  cursor:pointer;border:2px solid transparent;transition:.18s;white-space:nowrap;
}
.btn--primary{background:var(--orange);color:#fff}
.btn--primary:hover{background:var(--orange-fonce);transform:translateY(-2px)}
.btn--bleu{background:var(--bleu);color:#fff}
.btn--bleu:hover{background:var(--bleu-clair);transform:translateY(-2px)}
.btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn--ghost:hover{background:rgba(255,255,255,.12)}
.btn--ghost-bleu{background:#fff;color:var(--bleu);border-color:var(--gris-bord)}
.btn--ghost-bleu:hover{border-color:var(--bleu)}
.btn--lg{padding:17px 34px;font-size:1.08rem}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none}

/* ===== Header ===== */
.header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--gris-bord);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:1.5rem;color:var(--bleu);letter-spacing:-.03em}
.logo span{color:var(--orange)}
.logo-mark{
  width:34px;height:34px;border-radius:8px;background:var(--bleu);
  display:grid;place-items:center;color:#fff;font-weight:900;font-size:1.1rem;
}
.logo--img img{height:54px;width:auto}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{font-weight:600;color:var(--noir);font-size:.96rem}
.nav-links a:hover{color:var(--orange-fonce)}
.nav-cta{display:flex;align-items:center;gap:14px}
.burger{display:none;font-size:1.7rem;background:none;border:none;cursor:pointer;color:var(--bleu)}

/* ===== Hero ===== */
.hero{
  position:relative;color:#fff;
  background:
    linear-gradient(115deg,rgba(11,46,79,.93) 0%,rgba(11,46,79,.72) 55%,rgba(11,46,79,.45) 100%),
    url("https://images.unsplash.com/photo-1581094794329-c8112a89af12?q=80&w=1600&auto=format&fit=crop") center/cover;
}
.hero-inner{padding:104px 0 110px;max-width:680px}
.hero h1{color:#fff;font-size:clamp(2.2rem,5vw,3.5rem);margin-bottom:18px}
.hero p{font-size:1.2rem;color:#dbe7f2;margin-bottom:32px;max-width:560px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-badges{display:flex;gap:26px;margin-top:40px;flex-wrap:wrap}
.hero-badge{display:flex;align-items:center;gap:9px;color:#cfe0ef;font-weight:600;font-size:.95rem}
.hero-badge svg{flex:none}

/* ===== Atouts ===== */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.card{background:#fff;border:1px solid var(--gris-bord);border-radius:var(--radius);padding:32px;box-shadow:var(--ombre-soft)}
.card .ico{
  width:54px;height:54px;border-radius:12px;background:rgba(47,111,176,.14);
  display:grid;place-items:center;margin-bottom:18px;color:var(--orange-fonce)
}
.card h3{font-size:1.25rem;margin-bottom:8px}

/* ===== Étapes ===== */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:48px}
.step{position:relative;padding-top:8px}
.step-num{
  width:48px;height:48px;border-radius:50%;background:var(--bleu);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:1.3rem;margin-bottom:16px
}
.step h3{font-size:1.2rem;margin-bottom:6px}

/* ===== Bande CTA calculateur ===== */
.band{
  background:linear-gradient(120deg,var(--bleu) 0%,var(--bleu-clair) 100%);
  color:#fff;border-radius:20px;padding:54px;display:flex;
  align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;
}
.band h2{color:#fff;font-size:2rem;max-width:560px}
.band p{color:#cfe0ef;margin-top:8px;max-width:560px}

/* ===== Footer ===== */
.footer{background:var(--noir);color:#aeb9c4;padding:60px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;margin-bottom:40px}
.footer h4{color:#fff;font-size:1rem;margin-bottom:14px}
.footer a{display:block;color:#aeb9c4;margin-bottom:9px;font-size:.94rem}
.footer a:hover{color:var(--orange)}
.footer .logo{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:22px;font-size:.85rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ===== Parcours commande (commander.html) ===== */
.flow-head{background:var(--gris-bg);border-bottom:1px solid var(--gris-bord);padding:30px 0}
.stepbar{display:flex;gap:8px;max-width:760px;margin:18px auto 0;list-style:none}
.stepbar li{flex:1;text-align:center;font-size:.82rem;font-weight:700;color:#94a3b8;position:relative;padding-top:26px}
.stepbar li::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:20px;height:20px;border-radius:50%;background:#fff;border:3px solid #cbd5e1;
}
.stepbar li::after{content:"";position:absolute;top:9px;left:-50%;width:100%;height:3px;background:#cbd5e1;z-index:-0}
.stepbar li:first-child::after{display:none}
.stepbar li.active{color:var(--bleu)}
.stepbar li.active::before{background:var(--orange);border-color:var(--orange)}
.stepbar li.done{color:var(--vert)}
.stepbar li.done::before{background:var(--vert);border-color:var(--vert)}
.stepbar li.done::after,.stepbar li.active::after{background:var(--orange)}

.flow-wrap{display:grid;grid-template-columns:1fr 360px;gap:40px;align-items:start;padding:54px 0}
.panel{background:#fff;border:1px solid var(--gris-bord);border-radius:var(--radius);padding:34px;box-shadow:var(--ombre-soft)}
.panel h2{font-size:1.55rem;margin-bottom:6px}
.panel .sub{color:var(--gris-txt);margin-bottom:26px}
.hidden{display:none !important}

.field{margin-bottom:18px}
.field label{display:block;font-weight:700;margin-bottom:7px;font-size:.92rem;color:var(--noir)}
.field input,.field select{
  width:100%;padding:13px 14px;border:1.5px solid var(--gris-bord);border-radius:10px;
  font-size:1rem;font-family:inherit;background:#fff;transition:.15s
}
.field input:focus,.field select:focus{outline:none;border-color:var(--orange);box-shadow:0 0 0 3px rgba(47,111,176,.15)}
.field .hint{font-size:.82rem;color:#94a3b8;margin-top:5px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.row-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}

/* choix forme / mélange */
.choices{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-bottom:8px}
.choice{
  border:1.5px solid var(--gris-bord);border-radius:12px;padding:16px;cursor:pointer;
  transition:.15s;display:flex;gap:12px;align-items:flex-start
}
.choice:hover{border-color:var(--orange)}
.choice.sel{border-color:var(--orange);background:rgba(47,111,176,.07)}
.choice .c-ico{font-size:1.6rem;line-height:1}
.choice b{display:block;font-size:.98rem}
.choice small{color:var(--gris-txt)}

.result-vol{
  background:var(--bleu);color:#fff;border-radius:12px;padding:22px;text-align:center;margin-top:8px
}
.result-vol .big{font-size:2.6rem;font-weight:900;color:var(--orange)}

/* récap latéral */
.summary{background:#fff;border:1px solid var(--gris-bord);border-radius:var(--radius);padding:26px;box-shadow:var(--ombre-soft);position:sticky;top:96px}
.summary h3{font-size:1.15rem;margin-bottom:16px}
.sum-line{display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px dashed var(--gris-bord);font-size:.94rem}
.sum-line span:first-child{color:var(--gris-txt)}
.sum-line.total{border-bottom:none;border-top:2px solid var(--noir);margin-top:8px;padding-top:14px;font-size:1.25rem;font-weight:800}
.sum-line.total span:last-child{color:var(--bleu)}
.plant-pick{background:var(--gris-bg);border-radius:10px;padding:14px;margin-top:14px;font-size:.9rem}
.plant-pick b{color:var(--bleu)}

.flow-nav{display:flex;justify-content:space-between;margin-top:28px;gap:12px}

.confirm{text-align:center;padding:30px 0}
.confirm .check{width:84px;height:84px;border-radius:50%;background:rgba(30,158,106,.12);color:var(--vert);display:grid;place-items:center;margin:0 auto 22px;font-size:2.6rem}
.notice{background:rgba(47,111,176,.12);border:1px solid var(--orange);border-radius:10px;padding:14px 16px;font-size:.9rem;color:#1C3E6E;margin-top:20px}

/* ===== Responsive ===== */
@media(max-width:880px){
  .grid-3,.steps{grid-template-columns:1fr}
  .flow-wrap{grid-template-columns:1fr}
  .summary{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
  .burger{display:block}
  .nav-links.open{display:flex;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;padding:20px 24px;border-bottom:1px solid var(--gris-bord);gap:16px}
  .band{padding:34px}
  .choices,.row,.row-3{grid-template-columns:1fr}
}