/* ========================================
   creer-auto-entreprise.fr — 2026
   Design: clean, readable, tutorial-style
   ======================================== */

/* ---------- Reset & Base ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#1a56db;
  --primary-light:#e8effc;
  --primary-dark:#143faa;
  --accent:#f59e0b;
  --accent-light:#fef3c7;
  --green:#059669;
  --green-light:#d1fae5;
  --red:#dc2626;
  --red-light:#fee2e2;
  --gray-50:#f9fafb;
  --gray-100:#f3f4f6;
  --gray-200:#e5e7eb;
  --gray-300:#d1d5db;
  --gray-500:#6b7280;
  --gray-700:#374151;
  --gray-900:#111827;
  --radius:12px;
  --shadow:0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.06);
  --shadow-md:0 4px 6px rgba(0,0,0,.07),0 2px 4px rgba(0,0,0,.06);
  --shadow-lg:0 10px 15px rgba(0,0,0,.1),0 4px 6px rgba(0,0,0,.05);
  --max-w:820px;
  --font-sans:'Inter',system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:var(--font-sans);
  color:var(--gray-900);
  background:var(--gray-50);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}

/* ---------- Typography ---------- */
h1,h2,h3,h4{line-height:1.25;font-weight:700}
h1{font-size:2.25rem;margin-bottom:1rem}
h2{font-size:1.6rem;margin:2.5rem 0 1rem;padding-bottom:.5rem;border-bottom:2px solid var(--primary-light)}
h3{font-size:1.2rem;margin:1.5rem 0 .75rem;color:var(--primary-dark)}
p{margin-bottom:1rem}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-dark);text-decoration:underline}
ul,ol{margin:0 0 1rem 1.25rem}
li{margin-bottom:.4rem}
strong{font-weight:600}
mark{background:var(--accent-light);padding:1px 4px;border-radius:3px}

/* ---------- Layout ---------- */
.container{max-width:var(--max-w);margin:0 auto;padding:0 1.25rem}

/* ---------- Header ---------- */
.site-header{
  background:#fff;
  border-bottom:1px solid var(--gray-200);
  position:sticky;top:0;z-index:100;
}
.header-inner{
  max-width:1100px;margin:0 auto;padding:.75rem 1.25rem;
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.5rem;
}
.logo{font-size:1.15rem;font-weight:800;color:var(--primary)}
.logo span{color:var(--accent)}

/* Nav */
nav{display:flex;align-items:center;gap:.15rem;flex-wrap:wrap}
nav a{
  font-size:.82rem;font-weight:500;color:var(--gray-700);padding:.35rem .65rem;border-radius:6px;
  transition:background .2s,color .2s;white-space:nowrap;
}
nav a:hover,nav a.active{background:var(--primary-light);color:var(--primary);text-decoration:none}

/* Mobile nav toggle */
.nav-toggle{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--gray-700);padding:.25rem}

/* ---------- Hero ---------- */
.hero{
  background:linear-gradient(135deg,var(--primary) 0%,#2563eb 100%);
  color:#fff;padding:3rem 1.25rem;text-align:center;
}
.hero h1{font-size:2.5rem;margin-bottom:.75rem;color:#fff}
.hero p{font-size:1.15rem;opacity:.92;max-width:640px;margin:0 auto 1.5rem}
.hero .badge{
  display:inline-block;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.3);
  padding:.3rem .9rem;border-radius:20px;font-size:.85rem;font-weight:600;margin-bottom:1rem;
}

/* ---------- CTA Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.75rem 1.5rem;border-radius:8px;font-weight:600;font-size:.95rem;
  text-decoration:none;transition:all .2s;cursor:pointer;border:none;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#d97706;color:#fff;text-decoration:none;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-secondary{background:#fff;color:var(--primary)}
.btn-secondary:hover{background:var(--primary-light);text-decoration:none;transform:translateY(-1px)}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff;text-decoration:none}
.btn-green{background:var(--green);color:#fff}
.btn-green:hover{background:#047857;color:#fff;text-decoration:none;transform:translateY(-1px)}
.cta-group{display:flex;gap:.75rem;justify-content:center;flex-wrap:wrap;margin-top:1rem}

/* ---------- Breadcrumb ---------- */
.breadcrumb{
  font-size:.82rem;color:var(--gray-500);padding:1rem 0 0;
}
.breadcrumb a{color:var(--gray-500)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb span{margin:0 .35rem}

/* ---------- Content cards ---------- */
.card{
  background:#fff;border-radius:var(--radius);padding:1.75rem;margin-bottom:1.5rem;
  box-shadow:var(--shadow);border:1px solid var(--gray-200);
}
.card-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem;margin:1.5rem 0;
}
.card-link{text-decoration:none;color:inherit;transition:transform .2s,box-shadow .2s}
.card-link:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);text-decoration:none}
.card-link .card{height:100%}
.card-icon{font-size:2rem;margin-bottom:.75rem}
.card h3{margin-top:0}

/* ---------- Info boxes ---------- */
.info-box{
  border-radius:var(--radius);padding:1.25rem 1.5rem;margin:1.5rem 0;
  border-left:4px solid;
}
.info-box.tip{background:var(--green-light);border-color:var(--green)}
.info-box.warning{background:var(--accent-light);border-color:var(--accent)}
.info-box.danger{background:var(--red-light);border-color:var(--red)}
.info-box.info{background:var(--primary-light);border-color:var(--primary)}
.info-box strong{display:block;margin-bottom:.25rem}

/* ---------- Tables ---------- */
.table-wrap{overflow-x:auto;margin:1.5rem 0}
table{
  width:100%;border-collapse:collapse;font-size:.92rem;
  background:#fff;border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);
}
thead{background:var(--primary);color:#fff}
th,td{padding:.75rem 1rem;text-align:left}
th{font-weight:600;font-size:.82rem;text-transform:uppercase;letter-spacing:.03em}
tbody tr{border-bottom:1px solid var(--gray-200)}
tbody tr:last-child{border-bottom:none}
tbody tr:nth-child(even){background:var(--gray-50)}

/* ---------- Steps / Timeline ---------- */
.steps{counter-reset:step;list-style:none;margin:1.5rem 0;padding-left:0}
.steps li{
  counter-increment:step;position:relative;padding:1.25rem 1.25rem 1.25rem 3.5rem;
  background:#fff;border-radius:var(--radius);margin-bottom:.75rem;
  box-shadow:var(--shadow);border:1px solid var(--gray-200);
}
.steps li::before{
  content:counter(step);position:absolute;left:1rem;top:1.25rem;
  width:2rem;height:2rem;background:var(--primary);color:#fff;
  border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:.85rem;
}

/* ---------- Key figures ---------- */
.key-figure{
  text-align:center;padding:1.5rem 1rem;background:#fff;
  border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--gray-200);
}
.key-figure .number{font-size:2rem;font-weight:800;color:var(--primary);display:block}
.key-figure .label{font-size:.85rem;color:var(--gray-500);margin-top:.25rem}

/* ---------- TOC (Table of Contents) ---------- */
.toc{
  background:#fff;border-radius:var(--radius);padding:1.25rem 1.5rem;
  margin:1.5rem 0;box-shadow:var(--shadow);border:1px solid var(--gray-200);
}
.toc h3{margin-top:0;font-size:1rem}
.toc ol{margin-bottom:0}
.toc li{margin-bottom:.3rem}
.toc a{font-size:.92rem;font-weight:500}

/* ---------- FAQ / Accordion ---------- */
details{
  background:#fff;border-radius:var(--radius);margin-bottom:.75rem;
  box-shadow:var(--shadow);border:1px solid var(--gray-200);overflow:hidden;
}
details summary{
  padding:1rem 1.25rem;font-weight:600;cursor:pointer;
  list-style:none;display:flex;align-items:center;justify-content:space-between;
}
details summary::after{content:'+';;font-size:1.25rem;color:var(--gray-500);transition:transform .2s}
details[open] summary::after{content:'\2212'}
details .faq-body{padding:0 1.25rem 1.25rem}

/* ---------- CTA Banner ---------- */
.cta-banner{
  background:linear-gradient(135deg,var(--primary) 0%,#2563eb 100%);
  color:#fff;border-radius:var(--radius);padding:2rem;text-align:center;margin:2.5rem 0;
}
.cta-banner h3{color:#fff;margin-top:0;font-size:1.3rem}
.cta-banner p{opacity:.9;margin-bottom:1rem}

/* ---------- Video embed ---------- */
.video-container{
  position:relative;padding-bottom:56.25%;height:0;overflow:hidden;
  border-radius:var(--radius);box-shadow:var(--shadow-lg);margin:1.5rem 0;
}
.video-container iframe{
  position:absolute;top:0;left:0;width:100%;height:100%;border:0;
}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--gray-900);color:var(--gray-300);padding:2.5rem 1.25rem;
  margin-top:3rem;font-size:.85rem;text-align:center;
}
.site-footer a{color:var(--gray-300)}
.site-footer a:hover{color:#fff}
.footer-links{display:flex;gap:1.5rem;justify-content:center;flex-wrap:wrap;margin-bottom:1rem}

/* ---------- Responsive ---------- */
@media(max-width:768px){
  h1{font-size:1.75rem}
  h2{font-size:1.35rem}
  .hero{padding:2rem 1rem}
  .hero h1{font-size:1.85rem}
  .hero p{font-size:1rem}
  .card{padding:1.25rem}
  .card-grid{grid-template-columns:1fr}
  .nav-toggle{display:block}
  nav{
    display:none;width:100%;flex-direction:column;
    background:#fff;padding:.5rem 0;
    border-top:1px solid var(--gray-200);
  }
  nav.open{display:flex}
  nav a{padding:.5rem .75rem;width:100%}
  .header-inner{position:relative}
  .key-figure .number{font-size:1.5rem}
  .steps li{padding-left:3rem}
}

/* ---------- Print ---------- */
@media print{
  .site-header,nav,.cta-banner,.site-footer,.btn{display:none}
  body{font-size:12pt;background:#fff}
  .card{box-shadow:none;border:1px solid #ccc}
}

/* ---------- Animations ---------- */
@media(prefers-reduced-motion:no-preference){
  .card-link:hover{transition:transform .25s ease,box-shadow .25s ease}
  details summary{transition:background .2s}
  details summary:hover{background:var(--gray-50)}
}