/* ═══════════════════════════════════════════════════════════════════
   suede.css — Thème : drapeau bleu/jaune, minimalisme suédois, lagom
   ═══════════════════════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@500;700;800&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root{
  --ink:#0b1a2e;
  --paper:#fcfbf3;               /* blanc jaune pâle */
  --paper-2:#f4f1e0;
  --se-blue:#006aa7;             /* bleu drapeau */
  --se-blue-d:#003d66;
  --se-yellow:#fecc00;            /* jaune drapeau */
  --se-yellow-w:#fff4bf;
  --line:rgba(11,26,46,.1);
  --muted:#4e5a6b;
  --fd:'Syne',system-ui,sans-serif;
  --fb:'Inter',system-ui,sans-serif;
  --fm:'JetBrains Mono',monospace;
  --sw:280px;--r:0;
}
*,*::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:1.75;
  background-image:
    radial-gradient(ellipse 80% 40% at 100% 0%, rgba(254,204,0,.14), transparent 55%),
    radial-gradient(ellipse 80% 50% at 0% 100%, rgba(0,106,167,.08), transparent 55%);
  background-attachment:fixed;
}

.progress-bar{position:fixed;top:0;left:0;height:4px;width:0;z-index:200;
  background:var(--se-yellow)}

.page-layout{display:flex;min-height:100vh}
.sidebar{width:var(--sw);flex-shrink:0;background:#fff;border-right:1px solid var(--line);
  position:sticky;top:0;height:100vh;overflow-y:auto;display:flex;flex-direction:column}
/* Croix suédoise en décoration verticale */
.sidebar::before{content:'';position:absolute;top:0;right:0;width:6px;height:100%;background:var(--se-blue)}
.sidebar::after{content:'';position:absolute;top:38%;right:0;width:6px;height:12px;background:var(--se-yellow)}
.sidebar-header{padding:32px 24px 22px;background:var(--se-blue);color:#fff;position:relative}
.sidebar-header::after{content:'';position:absolute;right:24px;top:50%;width:26px;height:4px;background:var(--se-yellow);transform:translateY(-50%)}
.sidebar-back{display:block;font-family:var(--fm);font-size:.6rem;letter-spacing:.2em;
  text-decoration:none;color:rgba(255,255,255,.65);margin-bottom:12px;text-transform:uppercase}
.sidebar-back:hover{color:var(--se-yellow)}
.sidebar-title{font-family:var(--fd);font-size:2rem;line-height:1;color:#fff;font-weight:800;letter-spacing:-.02em}
.toc-nav{padding:14px 0;flex:1}
.toc-section-label{font-family:var(--fm);font-size:.58rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--muted);padding:10px 24px 6px}
.toc-link{display:block;padding:7px 24px;color:var(--ink);text-decoration:none;
  font-size:.9rem;font-weight:400;border-left:3px solid transparent;transition:all .18s}
.toc-link:hover,.toc-link.active{background:var(--se-yellow-w);border-left-color:var(--se-blue);color:var(--se-blue);font-weight:600}
.sidebar-nav{padding:16px 24px 22px;border-top:1px solid var(--line);background:var(--paper-2)}
.sidebar-nav p{font-family:var(--fm);font-size:.58rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--muted);margin:10px 0 8px}
.sidebar-nav a{display:block;text-decoration:none;color:var(--ink);padding:3px 0;font-size:.88rem}
.sidebar-nav a:hover{color:var(--se-blue)}
.sidebar-nav a.current{color:var(--se-blue);font-weight:700}

.main{flex:1;min-width:0;max-width:900px;padding:0 62px 100px}
.page-header{padding:60px 0 40px;margin-bottom:44px;position:relative}
.page-header::before{content:'';position:absolute;left:0;top:60px;width:80px;height:4px;background:var(--se-yellow)}
.subject-tag{font-family:var(--fm);font-size:.62rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--se-blue);margin:24px 0 14px;font-weight:600}
.page-title{font-family:var(--fd);font-size:4.6rem;line-height:.92;color:var(--ink);font-weight:800;letter-spacing:-.03em}
.page-title .sub{display:block;font-size:1.05rem;font-family:var(--fm);letter-spacing:.06em;
  color:var(--muted);margin-top:14px;font-weight:400}
.page-intro{margin-top:18px;max-width:640px;color:var(--muted);font-size:1.05rem;line-height:1.7}

.section{margin-bottom:58px;scroll-margin-top:24px}
.section-title{display:flex;align-items:baseline;gap:14px;font-family:var(--fd);font-size:2.2rem;
  font-weight:800;letter-spacing:-.02em;padding-bottom:10px;margin-bottom:20px;
  border-bottom:2px solid var(--ink);color:var(--ink)}
.section-title .num{font-family:var(--fm);font-size:.66rem;color:var(--se-blue);font-weight:600;
  background:var(--se-yellow);padding:5px 11px;letter-spacing:.12em;border-radius:0}

.box{margin:16px 0;padding:18px 20px 16px;background:#fff;border:1px solid var(--line);border-radius:0}
.box-label{display:block;font-family:var(--fm);font-size:.6rem;letter-spacing:.18em;
  text-transform:uppercase;margin-bottom:9px;font-weight:600}
.box.def{background:#fff;border-left:4px solid var(--se-blue)}
.box.def .box-label{color:var(--se-blue)}
.box.histoire{background:var(--se-yellow-w);border-left:4px solid var(--se-yellow);border-color:rgba(254,204,0,.4)}
.box.histoire .box-label{color:#a37c00}
.box.technique{background:var(--paper-2);border-left:4px solid var(--muted)}
.box.technique .box-label{color:var(--muted)}
.box.attention{background:#fcebea;border-left:4px solid #b42828}
.box.attention .box-label{color:#b42828}
.box.remark{background:transparent;border:none;border-left:3px solid var(--se-blue);padding-left:20px}
.box.remark .box-label{color:var(--se-blue)}
.box.chiffres{background:var(--se-blue-d);color:#fff;border:none;border-top:6px solid var(--se-yellow)}
.box.chiffres .box-label{color:var(--se-yellow)}
.box.chiffres p,.box.chiffres li{color:rgba(255,255,255,.9)}
.box p:last-child,.box ul:last-child{margin-bottom:0}
p{margin-bottom:.9em}ul{padding-left:1.35em;margin-bottom:.9em}li{margin-bottom:.3em}
strong{color:var(--se-blue-d);font-weight:700}

.data-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:.88rem;background:#fff}
.data-table th{background:var(--se-blue);color:var(--se-yellow);padding:10px 14px;text-align:left;
  font-family:var(--fm);font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;font-weight:600}
.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-weight:600;color:var(--se-blue-d)}
.box.chiffres .data-table th{background:rgba(254,204,0,.15)}
.box.chiffres .data-table td{border-color:rgba(255,255,255,.14);color:rgba(255,255,255,.9)}
.box.chiffres .data-table td:first-child{color:var(--se-yellow)}

.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(--se-blue);color:#fff;
  padding:12px 18px;align-items:center;justify-content:space-between;border-bottom:4px solid var(--se-yellow)}
.mobile-menu-btn{background:none;border:none;color:var(--se-yellow);font-size:1.3rem;cursor:pointer}
.mobile-title{font-family:var(--fd);font-size:1.15rem;color:#fff;font-weight:800}
.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:#fff;height:100%;
  overflow-y:auto;padding:14px 0;border-right:4px solid var(--se-blue)}
@media(max-width:960px){
  .sidebar{display:none}.mobile-header{display:flex}.main{padding:0 20px 72px}
  .page-title{font-size:2.9rem}.two-col{grid-template-columns:1fr}
}