/* Bureau Formations — Shared styles */
*{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#0D0B08;--bg2:#151210;--bg3:#1C1915;--border:#272320;--border2:#3A342D;--gold:#D4B87A;--gold-dim:#C8A96E;--cream:#F5F2EB;--dim:#B8AFA2;--muted:#8F877B;--green:#8FC08F;--blue:#60A5FA;--red:#E57373}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{background:var(--bg);color:var(--cream);font-family:'DM Sans',-apple-system,Helvetica,Arial,sans-serif;font-size:16px;line-height:1.75}
a{color:var(--gold);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{font-family:'Cormorant Garamond',Georgia,serif;font-weight:700;color:var(--cream);line-height:1.2;letter-spacing:-.01em}
code,pre{font-family:'JetBrains Mono',ui-monospace,Menlo,monospace}

/* Progress bar sticky top */
.bureau-progress{position:fixed;top:0;left:0;right:0;height:3px;background:rgba(0,0,0,0.3);z-index:60}
.bureau-progress-bar{height:100%;background:var(--gold);width:0%;transition:width .12s linear}

/* Layout */
.bureau-shell{display:grid;grid-template-columns:280px 1fr;min-height:100vh}
aside{position:sticky;top:0;height:100vh;overflow-y:auto;background:var(--bg2);border-right:1px solid var(--border);padding:22px 0}
aside .logo{display:flex;align-items:center;gap:10px;padding:0 20px 18px 20px;border-bottom:1px solid var(--border);margin-bottom:14px}
aside .logo-mark{width:32px;height:32px;border-radius:8px;background:var(--gold);color:var(--bg);display:flex;align-items:center;justify-content:center;font-family:'Cormorant Garamond',serif;font-weight:700;font-size:18px}
aside .logo span{font-family:'Cormorant Garamond',serif;font-size:16px;font-weight:700;color:var(--cream);letter-spacing:.08em}
aside nav{padding:6px 10px}
aside .section-label{font-size:10px;color:var(--muted);letter-spacing:.14em;text-transform:uppercase;padding:10px 12px 6px 12px}
aside a.chapter{display:flex;gap:10px;align-items:flex-start;padding:9px 12px;border-radius:8px;color:var(--dim);font-size:13px;line-height:1.45;transition:all .15s;border:1px solid transparent}
aside a.chapter:hover{background:var(--bg3);color:var(--cream);text-decoration:none}
aside a.chapter.active{background:var(--gold)15;color:var(--gold);border-color:var(--gold)40}
aside a.chapter .num{font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--muted);flex-shrink:0;margin-top:2px}
aside .back-link{display:flex;align-items:center;gap:8px;padding:12px 20px;color:var(--muted);font-size:12px;border-top:1px solid var(--border);margin-top:16px}
aside .back-link:hover{color:var(--gold);text-decoration:none}

main{padding:64px 64px 120px 64px;max-width:900px;margin:0 auto}
@media(max-width:980px){
  .bureau-shell{grid-template-columns:1fr}
  aside{position:static;height:auto;border-right:none;border-bottom:1px solid var(--border)}
  aside nav{display:none}
  main{padding:40px 22px 80px 22px}
}

/* Hero */
.meta-row{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-bottom:20px;font-size:12px;color:var(--muted)}
.meta-row .tag{display:inline-block;padding:4px 10px;background:var(--bg2);border:1px solid var(--border);border-radius:100px;color:var(--gold);font-weight:600;letter-spacing:.06em;text-transform:uppercase;font-size:10px}
h1.title{font-size:clamp(36px,5vw,52px);margin:4px 0 14px 0;line-height:1.1}
.subtitle{font-size:18px;color:var(--dim);line-height:1.6;max-width:720px;margin-bottom:30px}

/* Content */
main h2{font-size:32px;margin-top:60px;margin-bottom:14px;padding-top:14px;border-top:1px solid var(--border)}
main h2:first-of-type{border-top:none;padding-top:0}
main h3{font-size:22px;margin-top:32px;margin-bottom:10px;color:var(--gold)}
main h4{font-size:16px;margin-top:22px;margin-bottom:8px;font-family:'DM Sans',sans-serif;font-weight:700;color:var(--cream);letter-spacing:.02em;text-transform:uppercase;font-size:13px}
main p{margin:12px 0;color:var(--cream)}
main ul,main ol{margin:14px 0 14px 22px;color:var(--cream)}
main li{margin:8px 0;line-height:1.7}
main strong{color:var(--cream)}
main em{color:var(--gold);font-style:normal;font-weight:600}

/* Call-out boxes */
.callout{margin:22px 0;padding:18px 22px;border-radius:10px;border-left:3px solid var(--gold);background:var(--bg2)}
.callout.retenir{border-left-color:var(--gold)}
.callout.exemple{border-left-color:var(--blue);background:#0F1620}
.callout.exercice{border-left-color:var(--green);background:#0F1A10}
.callout.warning{border-left-color:var(--red);background:#1A0F0F}
.callout .label{display:block;font-family:'Cormorant Garamond',serif;font-weight:700;font-size:11px;color:var(--gold);letter-spacing:.14em;text-transform:uppercase;margin-bottom:6px}
.callout.exemple .label{color:var(--blue)}
.callout.exercice .label{color:var(--green)}
.callout.warning .label{color:var(--red)}

/* Tables */
.bureau-table{width:100%;border-collapse:collapse;margin:20px 0;background:var(--bg2);border:1px solid var(--border);border-radius:10px;overflow:hidden;font-size:14px}
.bureau-table th,.bureau-table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--border)}
.bureau-table th{background:#1C1915;color:var(--gold);font-weight:600;font-size:11px;letter-spacing:.06em;text-transform:uppercase}
.bureau-table tr:last-child td{border-bottom:none}

/* Code block */
pre.code{background:#08060A;border:1px solid var(--border);border-radius:10px;padding:18px 22px;margin:18px 0;overflow-x:auto;font-size:13px;line-height:1.6;color:#D4B87A}
code.inline{background:var(--bg2);border:1px solid var(--border);padding:2px 7px;border-radius:4px;font-size:13px;color:var(--gold)}

/* Actions row */
.actions-row{display:flex;gap:10px;flex-wrap:wrap;margin:24px 0 0 0}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:8px;font-size:13px;font-weight:700;cursor:pointer;border:none;font-family:inherit;min-height:44px;text-decoration:none}
.btn.primary{background:var(--gold);color:var(--bg)}
.btn.primary:hover{opacity:.9;text-decoration:none}
.btn.outline{background:transparent;color:var(--cream);border:1px solid var(--border2)}
.btn.outline:hover{border-color:var(--gold);color:var(--gold);text-decoration:none}

/* Interactive widgets */
.calc{margin:22px 0;padding:22px;background:var(--bg2);border:1px solid var(--border);border-radius:12px}
.calc h4{margin:0 0 14px 0;color:var(--gold);font-family:'Cormorant Garamond',serif;font-weight:700;font-size:18px;letter-spacing:normal;text-transform:none}
.calc label{display:block;font-size:12px;color:var(--dim);margin:12px 0 5px 0}
.calc input[type=number],.calc input[type=range]{width:100%;padding:10px 14px;background:var(--bg);border:1px solid var(--border);border-radius:8px;color:var(--cream);font-family:inherit;font-size:14px}
.calc .result{margin-top:16px;padding:16px;background:#1A1613;border:1px solid var(--gold);border-radius:8px;font-family:'Cormorant Garamond',serif;font-size:22px;color:var(--gold);font-weight:700;text-align:center}
.calc .result small{display:block;font-family:'DM Sans',sans-serif;font-size:11px;color:var(--dim);font-weight:400;margin-top:4px;text-transform:none;letter-spacing:normal}

/* Footer */
footer{background:var(--bg2);border-top:1px solid var(--border);padding:40px 22px 50px 22px;margin-top:80px;text-align:center;font-size:13px;color:var(--muted)}
footer a{color:var(--dim);margin:0 10px}
footer .also{margin-top:20px;font-size:12px}
footer .also a{color:var(--gold);display:inline-block;padding:4px 10px}

/* Print */
@media print{
  aside,.bureau-progress,.actions-row,footer .also{display:none!important}
  .bureau-shell{display:block}
  main{padding:20px 0;max-width:none}
  body{background:white;color:#0D0B08}
  h1,h2,h3,h4{color:#0D0B08}
  main p,main li,main strong{color:#0D0B08}
  .callout{background:#f5f5f0;border-left-color:#C8A96E}
  a{color:#0D0B08;text-decoration:underline}
}