/* Perspective Online — Blog (pages statiques GEO) */
:root{
  --primary:#0B57E0; --primary-dark:#0A4BC2; --accent:#F2A105;
  --fg:#171717; --fg-soft:#3f3f46; --muted:#6b7280;
  --bg:#ffffff; --bg-soft:#f7f8fa; --border:#e5e7eb;
  --maxw:800px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:'Segoe UI',system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
  color:var(--fg);background:var(--bg);line-height:1.7;font-size:17px;-webkit-font-smoothing:antialiased}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}

/* Header */
.po-header{position:sticky;top:0;z-index:500;background:rgba(255,255,255,.95);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}
.po-header .wrap{max-width:1120px;margin:0 auto;padding:0 16px;height:64px;
  display:flex;align-items:center;justify-content:space-between;gap:16px}
.po-logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--primary);
  font-size:19px;letter-spacing:.02em;text-decoration:none;white-space:nowrap}
.po-logo .mark{width:30px;height:30px;flex:0 0 auto}
.po-logo .on{color:var(--primary-dark)}
.po-nav{display:none;gap:4px;align-items:center}
.po-nav a{color:var(--fg-soft);padding:8px 12px;border-radius:8px;font-size:14px;font-weight:500}
.po-nav a:hover{background:var(--bg-soft);text-decoration:none;color:var(--primary)}
.po-cta{background:var(--primary);color:#fff !important;padding:9px 16px;border-radius:8px;
  font-size:14px;font-weight:600}
.po-cta:hover{background:var(--primary-dark);text-decoration:none}
@media(min-width:960px){.po-nav{display:flex}}

/* Layout */
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.article-head{padding:48px 0 24px}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:18px}
.breadcrumb a{color:var(--muted)}
.eyebrow{display:inline-block;background:rgba(11,87,224,.08);color:var(--primary);
  font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;
  padding:5px 12px;border-radius:999px;margin-bottom:16px}
h1{font-size:38px;line-height:1.18;margin:0 0 16px;font-weight:800;letter-spacing:-.02em}
.lede{font-size:20px;color:var(--fg-soft);margin:0 0 8px;line-height:1.55}
.meta{font-size:14px;color:var(--muted);margin-top:18px;padding-bottom:8px}
.hero-img{width:100%;border-radius:16px;margin:28px 0 8px;border:1px solid var(--border)}

article h2{font-size:27px;line-height:1.25;margin:44px 0 14px;font-weight:750;letter-spacing:-.01em;
  padding-top:8px}
article h3{font-size:20px;margin:30px 0 10px;font-weight:700}
article p{margin:0 0 18px}
article ul,article ol{margin:0 0 20px;padding-left:24px}
article li{margin-bottom:9px}
article strong{font-weight:700;color:var(--fg)}

/* Éléments enrichis */
.callout{background:var(--bg-soft);border-left:4px solid var(--primary);
  border-radius:0 12px 12px 0;padding:18px 22px;margin:26px 0}
.callout.accent{border-left-color:var(--accent)}
.callout p:last-child{margin-bottom:0}
.callout .t{font-weight:700;margin-bottom:6px;display:block}

table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--border);vertical-align:top}
th{background:var(--primary);color:#fff;font-weight:600;font-size:14px}
tr:nth-child(even) td{background:var(--bg-soft)}

.faq{margin:26px 0}
.faq details{border:1px solid var(--border);border-radius:12px;padding:2px 18px;margin-bottom:12px;background:#fff}
.faq summary{font-weight:650;cursor:pointer;padding:15px 0;font-size:16px;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"+";color:var(--primary);font-weight:800;margin-right:10px}
.faq details[open] summary::before{content:"–"}
.faq details[open] summary{border-bottom:1px solid var(--border)}
.faq .a{padding:14px 0 4px;color:var(--fg-soft)}

.cta-box{background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  color:#fff;border-radius:18px;padding:36px 32px;margin:44px 0;text-align:center}
.cta-box h3{color:#fff;font-size:24px;margin:0 0 10px}
.cta-box p{color:rgba(255,255,255,.9);margin:0 0 22px;font-size:16px}
.cta-box .btn{display:inline-block;background:var(--accent);color:#171717 !important;
  font-weight:700;padding:13px 28px;border-radius:10px;font-size:16px}
.cta-box .btn:hover{text-decoration:none;filter:brightness(1.05)}

.related{margin:48px 0}
.related h2{font-size:22px;margin-bottom:16px}
.related-grid{display:grid;gap:14px}
.related a{display:block;border:1px solid var(--border);border-radius:12px;padding:16px 18px;
  color:var(--fg);background:#fff;transition:box-shadow .15s}
.related a:hover{text-decoration:none;box-shadow:0 4px 16px rgba(11,87,224,.1);border-color:var(--primary)}
.related a .k{font-size:12px;color:var(--accent);font-weight:700;text-transform:uppercase;letter-spacing:.05em}
.related a .ti{font-weight:650;margin-top:4px;color:var(--primary)}
@media(min-width:640px){.related-grid{grid-template-columns:1fr 1fr}}

/* Index blog */
.blog-hero{background:linear-gradient(135deg,#0B57E0,#0A3F9E);color:#fff;padding:60px 0 54px}
.blog-hero h1{color:#fff;max-width:640px}
.blog-hero p{color:rgba(255,255,255,.9);font-size:19px;max-width:620px;margin:0}
.cards{display:grid;gap:20px;padding:40px 0 20px}
.card{border:1px solid var(--border);border-radius:16px;overflow:hidden;background:#fff;
  display:flex;flex-direction:column;transition:box-shadow .15s,transform .15s}
.card:hover{text-decoration:none;box-shadow:0 8px 30px rgba(11,87,224,.12);transform:translateY(-2px);border-color:var(--primary)}
.card .cimg{height:150px;background:var(--primary);position:relative;overflow:hidden}
.card .cimg img{width:100%;height:100%;object-fit:cover}
.card .cbody{padding:20px 22px 24px}
.card .ck{font-size:12px;color:var(--accent);font-weight:700;text-transform:uppercase;letter-spacing:.05em}
.card .ct{font-size:20px;font-weight:750;color:var(--fg);margin:6px 0 8px;line-height:1.3}
.card .cd{font-size:15px;color:var(--fg-soft);margin:0}
.card .cr{margin-top:14px;color:var(--primary);font-weight:600;font-size:14px}
@media(min-width:720px){.cards{grid-template-columns:1fr 1fr}}

/* Footer */
.po-footer{background:var(--primary);color:#fff;margin-top:64px}
.po-footer .wrap{max-width:1120px;margin:0 auto;padding:48px 16px;
  display:grid;gap:32px;grid-template-columns:1fr}
.po-footer h4{font-size:14px;font-weight:600;margin:0 0 14px}
.po-footer ul{list-style:none;padding:0;margin:0}
.po-footer li{margin-bottom:9px;font-size:14px;color:rgba(255,255,255,.8)}
.po-footer a{color:rgba(255,255,255,.8)}
.po-footer a:hover{color:var(--accent);text-decoration:none}
.po-footer .desc{font-size:14px;color:rgba(255,255,255,.8);margin-top:12px}
.po-footer .logo-light{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:#fff}
.po-footer .logo-light .on{color:#c9dcff}
.po-copy{border-top:1px solid rgba(255,255,255,.2);padding:16px;text-align:center;
  font-size:12px;color:rgba(255,255,255,.6)}
@media(min-width:768px){.po-footer .wrap{grid-template-columns:2fr 1fr 1fr 1.4fr}}