/* ═══════════════════════════════════════════════════════════════════
   belgique.css — Thème : Art Nouveau bruxellois, Horta, aubergine & or
   Polices : Cormorant Garamond (titres) + Lora (corps) + JetBrains Mono
   ═══════════════════════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Lora:ital,opsz,wght@0,10..72,400;0,10..72,500;0,10..72,600;1,10..72,400&family=JetBrains+Mono:wght@400;500&display=swap');

:root{
  --ink:#2a1c2a;              /* aubergine très foncé */
  --paper:#f5ebd9;            /* crème ivoire Art Nouveau */
  --paper-2:#ede0c8;
  --brick:#5a2a3d;            /* bordeaux */
  --gold:#c8a35c;             /* or chaud */
  --gold-2:#a8813f;
  --copper:#9e5a2b;
  --line:rgba(42,28,42,.14);
  --line-h:rgba(90,42,61,.35);
  --muted:#6a5a68;
  --fd:'Cormorant Garamond',Georgia,serif;
  --fb:'Lora',Georgia,serif;
  --fm:'JetBrains Mono',monospace;
  --sw:280px;--r:4px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--fb);background:var(--paper);color:var(--ink);
  font-size:16.5px;line-height:1.82;
  background-image:
    radial-gradient(ellipse 60% 80% at 0% 30%, rgba(200,163,92,.06), transparent 60%),
    radial-gradient(ellipse 80% 60% at 100% 70%, rgba(90,42,61,.05), transparent 60%);
  background-attachment:fixed;
}
/* Volutes Art Nouveau en arrière-plan */
body::before{
  content:'';position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.035;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 120'><path d='M20,60 Q20,20 60,20 T100,60 Q100,100 60,100 T20,60 Z' stroke='%232a1c2a' fill='none' stroke-width='1'/><path d='M40,60 Q40,40 60,40 T80,60' stroke='%232a1c2a' fill='none' stroke-width='.8'/></svg>");
  background-size:240px 240px;
}
.page-layout,.main,.sidebar{position:relative;z-index:1}

.progress-bar{position:fixed;top:0;left:0;height:3px;width:0;z-index:200;
  background:linear-gradient(90deg,var(--brick),var(--gold),var(--brick));
  box-shadow:0 1px 6px rgba(90,42,61,.3)}

.page-layout{display:flex;min-height:100vh}
.sidebar{width:var(--sw);flex-shrink:0;background:linear-gradient(175deg,var(--ink),#1b101b);color:#efe2c8;
  position:sticky;top:0;height:100vh;overflow-y:auto;display:flex;flex-direction:column;
  border-right:1px solid var(--gold);box-shadow:inset -4px 0 0 rgba(200,163,92,.15)}
.sidebar::after{content:'';position:absolute;inset:0;pointer-events:none;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 200'><path d='M100,20 Q140,20 140,60 Q140,100 100,100 Q60,100 60,140 Q60,180 100,180' stroke='%23c8a35c' fill='none' stroke-width='.6' opacity='.35'/></svg>");
  background-position:center;background-repeat:no-repeat;background-size:100% 100%;opacity:.5}
.sidebar>*{position:relative;z-index:1}
.sidebar-header{padding:30px 24px 22px;border-bottom:1px solid rgba(200,163,92,.18)}
.sidebar-back{display:block;font-family:var(--fm);font-size:.6rem;letter-spacing:.16em;
  text-decoration:none;color:rgba(239,226,200,.45);margin-bottom:14px;text-transform:uppercase}
.sidebar-back:hover{color:var(--gold)}
.sidebar-title{font-family:var(--fd);font-size:2.1rem;line-height:1;font-style:italic;color:var(--gold);letter-spacing:.01em}
.toc-nav{padding:12px 0 14px;flex:1}
.toc-section-label{font-family:var(--fm);font-size:.56rem;letter-spacing:.22em;text-transform:uppercase;
  color:rgba(239,226,200,.32);padding:10px 24px 6px}
.toc-link{display:block;padding:6px 24px 6px 28px;color:rgba(239,226,200,.72);text-decoration:none;
  border-left:2px solid transparent;font-family:var(--fb);font-size:.88rem;transition:all .2s}
.toc-link:hover,.toc-link.active{background:rgba(200,163,92,.09);border-left-color:var(--gold);color:var(--gold)}
.sidebar-nav{padding:14px 24px 22px;border-top:1px solid rgba(200,163,92,.18)}
.sidebar-nav p{font-family:var(--fm);font-size:.56rem;letter-spacing:.18em;text-transform:uppercase;
  color:rgba(239,226,200,.36);margin:10px 0 8px}
.sidebar-nav a{display:block;text-decoration:none;color:rgba(239,226,200,.62);padding:2px 0;
  font-family:var(--fd);font-size:.96rem;font-style:italic}
.sidebar-nav a:hover,.sidebar-nav a.current{color:var(--gold)}

.main{flex:1;min-width:0;max-width:880px;padding:0 60px 100px}
.page-header{padding:56px 0 38px;margin-bottom:46px;border-bottom:1px solid var(--line-h);position:relative}
.page-header::after{content:'';position:absolute;left:0;bottom:-1px;width:160px;height:2px;
  background:linear-gradient(90deg,var(--gold),var(--brick),transparent)}
.page-header::before{content:'❦';position:absolute;right:0;top:58px;font-size:2rem;color:var(--gold);opacity:.5}
.subject-tag{font-family:var(--fm);font-size:.62rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--brick);margin-bottom:14px}
.page-title{font-family:var(--fd);font-size:3.9rem;line-height:.95;font-style:italic;color:var(--ink);font-weight:500}
.page-title .sub{display:block;font-size:1.08rem;font-family:var(--fm);letter-spacing:.1em;
  text-transform:uppercase;color:var(--brick);margin-top:10px;font-style:normal;font-weight:400}
.page-intro{margin-top:16px;max-width:640px;color:var(--muted);font-style:italic;font-size:1.02rem}

.section{margin-bottom:56px;scroll-margin-top:24px}
.section-title{display:flex;align-items:baseline;gap:14px;font-family:var(--fd);font-size:2.05rem;
  font-style:italic;font-weight:500;padding-bottom:10px;margin-bottom:20px;
  border-bottom:1px solid var(--line);color:var(--ink)}
.section-title .num{font-family:var(--fm);font-size:.68rem;font-style:normal;color:var(--paper);
  background:var(--brick);padding:3px 10px;border-radius:2px;letter-spacing:.08em}

.box{margin:16px 0;padding:17px 20px 15px;border-radius:var(--r);position:relative}
.box-label{display:block;font-family:var(--fm);font-size:.6rem;letter-spacing:.16em;
  text-transform:uppercase;margin-bottom:9px;font-weight:500}
.box.def{background:#fbf5e6;border:1px solid rgba(200,163,92,.35);border-left:3px solid var(--gold)}
.box.def .box-label{color:var(--gold-2)}
.box.histoire{background:#f3e4d0;border:1px solid rgba(158,90,43,.28);border-left:3px solid var(--copper)}
.box.histoire .box-label{color:var(--copper)}
.box.technique{background:var(--paper-2);border:1px solid var(--line);border-left:3px solid var(--muted)}
.box.technique .box-label{color:var(--muted)}
.box.attention{background:#f7e3e3;border:1px solid rgba(150,40,40,.22);border-left:3px solid #a63232}
.box.attention .box-label{color:#8c2424}
.box.remark{background:transparent;border-left:2px solid var(--gold);padding-left:18px}
.box.remark .box-label{color:var(--gold-2)}
.box.chiffres{background:var(--ink);color:#efe2c8;border:1px solid var(--gold);border-left:3px solid var(--gold)}
.box.chiffres .box-label{color:var(--gold)}
.box.chiffres p,.box.chiffres li{color:rgba(239,226,200,.88)}
.box p:last-child,.box ul:last-child{margin-bottom:0}
p{margin-bottom:.9em}ul{padding-left:1.4em;margin-bottom:.9em}li{margin-bottom:.32em}
strong{color:var(--brick);font-weight:600}

.data-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:.9rem;
  border:1px solid var(--line);background:#fbf5e6;border-radius:var(--r);overflow:hidden}
.data-table th{background:var(--ink);color:var(--gold);padding:10px 14px;text-align:left;
  font-family:var(--fm);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;font-weight:500}
.data-table td{padding:9px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.data-table tr:last-child td{border-bottom:none}
.data-table td:first-child{font-family:var(--fd);font-style:italic;color:var(--brick);font-weight:500}

.two-col{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:14px 0}.two-col .box{margin:0}

.mobile-header{display:none;position:sticky;top:0;z-index:50;background:var(--ink);
  padding:12px 18px;align-items:center;justify-content:space-between;border-bottom:1px solid var(--gold)}
.mobile-menu-btn{background:none;border:none;color:var(--gold);font-size:1.3rem;cursor:pointer}
.mobile-title{font-family:var(--fd);font-size:1.1rem;font-style:italic;color:var(--gold)}
.mobile-drawer{display:none;position:fixed;inset:0;z-index:100}
.mobile-drawer.open{display:flex}
.drawer-overlay{position:absolute;inset:0;background:rgba(0,0,0,.7)}
.drawer-panel{position:relative;z-index:1;width:280px;background:var(--ink);height:100%;
  overflow-y:auto;padding:14px 0;border-right:1px solid var(--gold)}
@media(max-width:960px){
  .sidebar{display:none}.mobile-header{display:flex}.main{padding:0 20px 72px}
  .page-title{font-size:2.6rem}.two-col{grid-template-columns:1fr}
}