:root{
  --papier:#F5F3EE; --surface:#FFFFFF; --encre:#14202E; --doux:#5D6874;
  --or:#A9803C; --or-pale:#F2E9DA; --marine:#0E1A2B; --bord:#E3E0D8;
  --bleu:#2a78d6; --orange:#eb6834; --gris:#9aa1ab; --vert:#1baf7a;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--papier);color:var(--encre);
  font:16.5px/1.68 "Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;
  -webkit-font-smoothing:antialiased}
.sans{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Arial,sans-serif}
.wrap{max-width:1000px;margin:0 auto;padding:0 22px}
a{color:#1a56b8}

/* barre */
.bar{position:sticky;top:0;z-index:50;background:rgba(245,243,238,.94);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--bord)}
.bar .wrap{display:flex;align-items:center;gap:18px;height:52px;font-size:13px}
.bar b{font-family:-apple-system,BlinkMacSystemFont,sans-serif;letter-spacing:.02em}
.bar nav{margin-left:auto;display:flex;gap:16px;flex-wrap:wrap}
.bar nav a{color:var(--doux);text-decoration:none;font-family:-apple-system,sans-serif}
.bar nav a:hover{color:var(--encre)}

/* hero */
header.hero{padding:74px 0 40px;border-bottom:1px solid var(--bord)}
.surt{font-family:ui-monospace,"SF Mono",Menlo,monospace;font-size:11.5px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--or);margin:0 0 20px}
h1{font-size:clamp(34px,5.4vw,58px);line-height:1.06;margin:0 0 20px;font-weight:400;letter-spacing:-.015em;max-width:19ch}
.chapo{font-size:19.5px;line-height:1.62;color:var(--doux);max-width:64ch;margin:0}
.faits{display:flex;flex-wrap:wrap;gap:0;margin:40px 0 0;border-top:1px solid var(--bord)}
.fait{flex:1 1 180px;padding:20px 22px 18px;border-right:1px solid var(--bord)}
.fait:last-child{border-right:none}
.fait b{display:block;font-family:-apple-system,sans-serif;font-size:30px;line-height:1;letter-spacing:-.02em}
.fait span{display:block;font-size:13.5px;color:var(--doux);margin-top:7px;font-family:-apple-system,sans-serif;line-height:1.4}

/* chapitres */
section{padding:60px 0 8px;border-top:1px solid var(--bord)}
section:first-of-type{border-top:none}
h2{font-size:clamp(25px,3.2vw,33px);line-height:1.16;margin:0 0 6px;font-weight:400;letter-spacing:-.01em;max-width:24ch}
h2 .no{font-family:ui-monospace,Menlo,monospace;font-size:12px;color:var(--or);letter-spacing:.14em;
  display:block;margin-bottom:12px;font-weight:400}
h3{font-family:-apple-system,BlinkMacSystemFont,sans-serif;font-size:16px;margin:34px 0 10px;letter-spacing:.01em}
.sous{color:var(--doux);font-size:17px;margin:0 0 26px;max-width:66ch}
p{max-width:70ch;margin:0 0 17px}
ul,ol{max-width:70ch}
li{margin-bottom:8px}
strong{font-weight:600}
.mono{font-family:ui-monospace,"SF Mono",Menlo,monospace;font-variant-numeric:tabular-nums}

/* encadrés */
.note{border-left:3px solid var(--or);padding:4px 0 4px 20px;margin:26px 0;max-width:70ch;color:var(--encre)}
.note p:last-child{margin-bottom:0}
.note.froid{border-left-color:var(--bleu)}
.note.chaud{border-left-color:var(--orange)}
.enc{background:var(--surface);border:1px solid var(--bord);border-radius:4px;padding:22px 24px;margin:24px 0}
.enc h4{font-family:-apple-system,sans-serif;font-size:15px;margin:0 0 10px}
.enc p:last-child{margin-bottom:0}

/* tableaux */
.tw{overflow-x:auto;margin:22px 0;border:1px solid var(--bord);border-radius:4px;background:var(--surface)}
table{width:100%;border-collapse:collapse;font-size:14px;font-family:-apple-system,BlinkMacSystemFont,sans-serif}
th{font-size:10.5px;text-transform:uppercase;letter-spacing:.1em;color:var(--doux);text-align:left;
  padding:11px 14px;border-bottom:1px solid var(--bord);white-space:nowrap;font-weight:600}
td{padding:9px 14px;border-bottom:1px solid #EFEDE7;vertical-align:top}
tr:last-child td{border-bottom:none}
td.n,th.n{text-align:right;font-variant-numeric:tabular-nums;font-family:ui-monospace,Menlo,monospace;white-space:nowrap}
.tag{display:inline-block;font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;
  padding:2px 7px;border-radius:3px;background:var(--or-pale);color:var(--or);font-weight:600;white-space:nowrap}
.tag.on{background:#E3F2E9;color:#1a7a4a}
.tag.off{background:#F0EFEC;color:#8a8f98}
.tag.b{background:#E6EFFA;color:#1a56b8}

/* graphiques */
.g{width:100%;height:auto;display:block;margin:16px 0 8px;font-family:-apple-system,sans-serif}
.gl{font-size:12.5px;fill:var(--encre)}
.gv{font-size:12px;fill:var(--doux);font-variant-numeric:tabular-nums}
figcaption{font-size:13px;color:var(--doux);margin-top:6px;font-family:-apple-system,sans-serif;max-width:70ch}
figure{margin:26px 0}

/* verbatims */
.verb{background:var(--surface);border:1px solid var(--bord);border-left:3px solid var(--or);
  border-radius:0 4px 4px 0;padding:15px 18px;margin:12px 0;font-size:14.5px}
.verb .src{font-family:-apple-system,sans-serif;font-size:11.5px;color:var(--doux);
  display:flex;gap:12px;flex-wrap:wrap;margin-bottom:7px}
.verb .src b{color:var(--encre)}
.verb .t{font-family:ui-monospace,Menlo,monospace;font-size:13px;line-height:1.55;white-space:pre-wrap}

/* galeries */
.gal{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px;margin:22px 0}
.gal figure{margin:0}
.gal img{width:100%;height:auto;display:block;border:1px solid var(--bord);border-radius:3px;background:#fff}
.gal figcaption{font-size:11.5px;margin-top:5px;line-height:1.4}
.shots{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin:22px 0}
.shots img{width:100%;border:1px solid var(--bord);border-radius:4px;display:block}

/* tunnels */
.tun{background:var(--surface);border:1px solid var(--bord);border-radius:4px;margin:16px 0;overflow:hidden}
.tun .th{display:flex;align-items:baseline;gap:12px;padding:15px 20px;border-bottom:1px solid var(--bord);flex-wrap:wrap}
.tun .th h4{margin:0;font-family:-apple-system,sans-serif;font-size:16px}
.tun .th .d{font-size:12.5px;color:var(--doux);font-family:ui-monospace,Menlo,monospace}
.tun .tb{padding:16px 20px;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px 26px}
.tun .k{font-size:10.5px;text-transform:uppercase;letter-spacing:.1em;color:var(--doux);
  font-family:-apple-system,sans-serif;margin-bottom:3px}
.tun .v{font-size:14.5px;line-height:1.5}
.etapes{counter-reset:e;list-style:none;padding:0;margin:14px 0}
.etapes li{counter-increment:e;position:relative;padding-left:38px;margin-bottom:11px}
.etapes li::before{content:counter(e);position:absolute;left:0;top:2px;width:24px;height:24px;border-radius:50%;
  background:var(--marine);color:#fff;font-size:12px;font-weight:600;display:flex;align-items:center;
  justify-content:center;font-family:ui-monospace,Menlo,monospace}

/* annonces maquettées */
.serp{background:var(--surface);border:1px solid var(--bord);border-radius:6px;padding:16px 18px;margin:12px 0;
  font-family:arial,sans-serif}
.serp .ad{font-size:12px;font-weight:700;color:var(--encre)}
.serp .u{font-size:12.5px;color:#4d5156;margin:3px 0 4px}
.serp .t{font-size:19px;line-height:1.3;color:#1a0dab;margin:2px 0 4px}
.serp .d{font-size:13.5px;line-height:1.55;color:#4d5156}
.serp .sl{display:flex;gap:18px;flex-wrap:wrap;margin-top:9px;padding-top:9px;border-top:1px solid var(--bord)}
.serp .sl span{font-size:13px;color:#1a0dab}
.meta-ad{background:var(--surface);border:1px solid var(--bord);border-radius:6px;overflow:hidden;margin:12px 0;
  font-family:-apple-system,sans-serif;max-width:420px}
.meta-ad .mh{padding:12px 14px 0;font-size:13px}
.meta-ad .mb{padding:8px 14px 14px;font-size:14px;white-space:pre-wrap;line-height:1.5}
.meta-ad .mf{background:#F0F2F5;padding:11px 14px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.meta-ad .mf .l{font-size:12px;color:var(--doux)}
.meta-ad .mf .l b{display:block;color:var(--encre);font-size:14px}
.meta-ad .mf .btn{background:#E4E6EB;border-radius:5px;padding:7px 12px;font-size:13px;font-weight:600;white-space:nowrap}

details{border:1px solid var(--bord);border-radius:4px;background:var(--surface);padding:0;margin:20px 0}
summary{cursor:pointer;padding:13px 18px;font-family:-apple-system,sans-serif;font-size:14.5px;font-weight:600;list-style:none}
summary::-webkit-details-marker{display:none}
summary::before{content:"+ ";color:var(--or);font-family:ui-monospace,monospace}
details[open] summary::before{content:"− "}
details[open] summary{border-bottom:1px solid var(--bord)}
details .dc{padding:6px 18px 16px}
details .dc .tw{border:none;margin:10px 0}

footer{border-top:1px solid var(--bord);margin-top:70px;padding:34px 0 80px;color:var(--doux);
  font-size:13.5px;font-family:-apple-system,sans-serif}

@media(max-width:720px){
  .fait{flex:1 1 50%;border-right:none;border-bottom:1px solid var(--bord)}
  .bar nav{display:none}
  .tun .tb{grid-template-columns:1fr}
}