/* ════════════════════════════════════════════════════════════
   site.css - Site public de présentation OmniGest
   Pages : index, demo, inscription, contact, devis
   ════════════════════════════════════════════════════════════ */
:root{
  --brand-1:#4f46e5; --brand-2:#7c3aed; --brand-3:#0ea5e9;
  --ink:#0f172a; --muted:#64748b; --line:#e2e8f0; --bg:#ffffff; --bg-soft:#f8fafc;
  --radius:16px; --shadow:0 10px 40px rgba(79,70,229,.10);
  --maxw:1160px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:'Inter',system-ui,Segoe UI,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.center{text-align:center;}

/* ── Boutons ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 24px;border-radius:12px;font-weight:600;font-size:15px;cursor:pointer;
  border:none;transition:transform .15s,box-shadow .2s,opacity .2s;white-space:nowrap;}
.btn-primary{background:linear-gradient(135deg,var(--brand-1),var(--brand-2));color:#fff;
  box-shadow:0 6px 18px rgba(79,70,229,.35);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(79,70,229,.45);}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.25);}
.btn-ghost:hover{background:rgba(255,255,255,.2);}
.btn-outline{background:#fff;color:var(--brand-1);border:1.5px solid var(--brand-1);}
.btn-outline:hover{background:var(--bg-soft);}
.btn-lg{padding:16px 32px;font-size:16px;}
.btn:disabled{opacity:.6;cursor:not-allowed;transform:none;}

/* ── Header ── */
.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line);}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px;}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.4px;}
.brand img{width:38px;height:38px;object-fit:contain;}
.brand span b{color:var(--brand-1);}
.nav-links{display:flex;align-items:center;gap:28px;}
.nav-links a{font-weight:500;color:var(--muted);font-size:15px;transition:color .2s;}
.nav-links a:hover{color:var(--ink);}
.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-toggle{display:none;background:none;border:none;font-size:22px;color:var(--ink);cursor:pointer;}

/* ── Hero ── */
.hero{position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(135deg,#1e1b4b 0%,#312e81 35%,#4f46e5 72%,#0ea5e9 100%);}
.hero::before{content:'';position:absolute;inset:0;
  background:radial-gradient(circle at 18% 20%,rgba(139,92,246,.35),transparent 45%),
             radial-gradient(circle at 82% 75%,rgba(14,165,233,.30),transparent 45%);}
.hero-inner{position:relative;z-index:2;padding:92px 24px 100px;text-align:center;max-width:860px;margin:0 auto;}
.hero h1{font-size:clamp(34px,5vw,56px);font-weight:800;line-height:1.1;letter-spacing:-1px;}
.hero h1 .grad{background:linear-gradient(90deg,#a5b4fc,#67e8f9);-webkit-background-clip:text;
  background-clip:text;-webkit-text-fill-color:transparent;}
.hero p{font-size:clamp(16px,2vw,20px);opacity:.85;margin:20px auto 32px;max-width:620px;}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}
.hero-note{margin-top:18px;font-size:13.5px;opacity:.7;}
.chips{display:flex;flex-wrap:wrap;gap:9px;justify-content:center;margin-top:38px;}
.chip{padding:7px 14px;border-radius:20px;background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.2);font-size:13px;font-weight:500;}

/* ── Sections ── */
section{padding:78px 0;}
.section-head{text-align:center;max-width:640px;margin:0 auto 50px;}
.eyebrow{color:var(--brand-1);font-weight:700;font-size:13px;text-transform:uppercase;letter-spacing:1px;}
.section-head h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;letter-spacing:-.6px;margin:10px 0 12px;}
.section-head p{color:var(--muted);font-size:17px;}
.soft{background:var(--bg-soft);}

/* ── Grilles de cartes ── */
.grid{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;
  transition:transform .2s,box-shadow .2s;}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.card .ico{width:52px;height:52px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  font-size:22px;color:#fff;background:linear-gradient(135deg,var(--brand-1),var(--brand-2));margin-bottom:16px;}
.card h3{font-size:18px;font-weight:700;margin-bottom:8px;}
.card p{color:var(--muted);font-size:14.5px;}

/* ── Onglets de fonctionnalités ── */
.feat-tabs{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:36px;}
.feat-tab{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:30px;
  border:1.5px solid var(--line);background:#fff;color:var(--muted);
  font:600 14px 'Inter',system-ui,sans-serif;cursor:pointer;transition:all .2s;white-space:nowrap;}
.feat-tab:hover{color:var(--ink);border-color:var(--brand-1);}
.feat-tab.active{background:linear-gradient(135deg,var(--brand-1),var(--brand-2));color:#fff;
  border-color:transparent;box-shadow:0 6px 16px rgba(79,70,229,.3);}
.feat-grid .card{animation:featIn .3s ease both;}
@keyframes featIn{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:none;}}

/* ── Groupes de fonctionnalités par catégorie ── */
.feat-group{margin-top:46px;}
.feat-group:first-child{margin-top:0;}
.feat-cat{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:700;
  color:var(--brand-1);text-transform:uppercase;letter-spacing:.6px;
  margin-bottom:18px;padding-bottom:11px;border-bottom:1px solid var(--line);}
.feat-cat i{font-size:16px;}

/* ── Types de commerce ── */
.commerce-grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(148px,1fr));}
.commerce-item{display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:28px 14px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  text-align:center;font-weight:600;font-size:15px;color:var(--ink);
  transition:transform .2s,box-shadow .2s,border-color .2s;}
.commerce-item:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent;}
.commerce-ico{width:64px;height:64px;border-radius:18px;display:flex;align-items:center;justify-content:center;
  color:#fff;background:linear-gradient(135deg,var(--brand-1),var(--brand-2));box-shadow:0 6px 16px rgba(79,70,229,.25);}
.commerce-ico svg{width:32px;height:32px;}

/* ── Étapes ── */
.steps{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));counter-reset:step;}
.step{position:relative;padding:28px 24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);}
.step::before{counter-increment:step;content:counter(step);position:absolute;top:-16px;left:24px;
  width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--brand-1),var(--brand-2));
  color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;}
.step h3{margin:8px 0 6px;font-size:17px;}
.step p{color:var(--muted);font-size:14px;}

/* ── Tarifs ── */
.pricing{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));align-items:stretch;}
.plan{background:#fff;border:1.5px solid var(--line);border-radius:var(--radius);padding:32px 26px;display:flex;flex-direction:column;}
.plan.popular{border-color:var(--brand-1);box-shadow:var(--shadow);position:relative;}
.plan.popular::after{content:'Populaire';position:absolute;top:18px;right:18px;background:var(--brand-1);
  color:#fff;font-size:11px;font-weight:700;padding:4px 10px;border-radius:20px;}
.plan h3{font-size:19px;}
.plan .price{font-size:38px;font-weight:800;margin:12px 0 2px;letter-spacing:-1px;}
.plan .price small{font-size:14px;font-weight:500;color:var(--muted);}
.plan ul{list-style:none;margin:18px 0 24px;display:flex;flex-direction:column;gap:10px;}
.plan li{display:flex;gap:9px;font-size:14.5px;color:#334155;}
.plan li i{color:#16a34a;margin-top:3px;}
.plan .btn{margin-top:auto;}

/* ── Bande CTA ── */
.cta-band{background:linear-gradient(135deg,#312e81,#4f46e5);color:#fff;border-radius:24px;
  padding:54px 40px;text-align:center;}
.cta-band h2{font-size:clamp(24px,3vw,34px);font-weight:800;margin-bottom:12px;}
.cta-band p{opacity:.85;margin-bottom:26px;font-size:17px;}

/* ── Formulaires ── */
.form-wrap{max-width:560px;margin:0 auto;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:34px;box-shadow:var(--shadow);}
.form-row{display:grid;gap:16px;grid-template-columns:1fr 1fr;}
.field{margin-bottom:16px;}
.field.full{grid-column:1/-1;}
.field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:6px;}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1.5px solid var(--line);
  border-radius:10px;font-family:inherit;font-size:14.5px;color:var(--ink);background:#fff;transition:border-color .2s,box-shadow .2s;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand-1);
  box-shadow:0 0 0 3px rgba(79,70,229,.12);}
.field textarea{resize:vertical;min-height:110px;}
.field .hint{font-size:12.5px;color:var(--muted);margin-top:5px;}
.checks{display:flex;flex-wrap:wrap;gap:10px;}
.check{display:flex;align-items:center;gap:8px;padding:9px 13px;border:1.5px solid var(--line);
  border-radius:10px;font-size:13.5px;cursor:pointer;user-select:none;}
.check input{width:16px;height:16px;accent-color:var(--brand-1);}
.check:has(input:checked){border-color:var(--brand-1);background:rgba(79,70,229,.06);}
.form-alert{display:none;padding:12px 14px;border-radius:10px;font-size:14px;margin-bottom:16px;align-items:center;gap:9px;}
.form-alert.show{display:flex;}
.form-alert.error{background:#fef2f2;color:#dc2626;border:1px solid #fecaca;}
.form-alert.success{background:#f0fdf4;color:#16a34a;border:1px solid #bbf7d0;}
.spinner{width:18px;height:18px;border:2.5px solid rgba(255,255,255,.45);border-top-color:#fff;
  border-radius:50%;animation:spin .7s linear infinite;display:none;}
.btn.loading .spinner{display:inline-block;}
.btn.loading .label{display:none;}
@keyframes spin{to{transform:rotate(360deg);}}

/* ── Page d'en-tête (sous-pages) ── */
.page-hero{background:linear-gradient(135deg,#1e1b4b,#4f46e5);color:#fff;padding:64px 24px 56px;text-align:center;}
.page-hero h1{font-size:clamp(28px,4vw,42px);font-weight:800;letter-spacing:-.6px;}
.page-hero p{opacity:.85;margin-top:12px;font-size:17px;max-width:560px;margin-inline:auto;}

/* ── Footer ── */
.site-footer{background:#0f172a;color:#cbd5e1;padding:54px 0 28px;margin-top:0;}
.footer-grid{display:grid;gap:34px;grid-template-columns:1.6fr 1fr 1fr 1.3fr;}
.footer-grid h4{color:#fff;font-size:15px;margin-bottom:14px;}
.footer-grid a{display:block;color:#94a3b8;font-size:14px;padding:4px 0;transition:color .2s;}
.footer-grid a:hover{color:#fff;}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#fff;font-size:18px;margin-bottom:12px;}
.footer-brand img{width:34px;height:34px;}
.footer-bottom{border-top:1px solid #1e293b;margin-top:36px;padding-top:20px;text-align:center;font-size:13px;color:#64748b;}

/* ── Responsive ── */
@media(max-width:860px){
  .nav-links,.nav-actions .btn-outline{display:none;}
  .nav-toggle{display:block;}
  .nav-links.open{display:flex;position:absolute;top:68px;left:0;right:0;flex-direction:column;
    background:#fff;border-bottom:1px solid var(--line);padding:18px 24px;gap:16px;box-shadow:var(--shadow);}
  .form-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  section{padding:56px 0;}
}
@media(max-width:560px){
  .footer-grid{grid-template-columns:1fr;gap:24px;}
}