/* architecture.css — Thème : Pierre calcaire, béton brut, ocre terre, bleu plan, plans techniques */
@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@500;700&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');
:root{
  --sb:#1a1713;--sb2:#231e18;--surf:#2d2720;--surf2:#3d3529;
  --stn:#c4ae8d;--stn2:#ddc9a8;--stn-p:rgba(221,201,168,.1);--stn-d:rgba(221,201,168,.45);
  --bet:#7d7268;--bet2:#9a8f84;
  --ocr:#b87333;--ocr2:#d68e4c;--ocr-p:rgba(184,115,51,.12);--ocr-d:rgba(184,115,51,.46);
  --bpl:#2d5266;--bpl2:#4a7a94;--bpl-p:rgba(74,122,148,.1);
  --ink:#ebe3d4;--ink2:rgba(235,227,212,.65);--ink3:rgba(235,227,212,.3);
  --brd:rgba(221,201,168,.2);--brdh:rgba(221,201,168,.46);
  --fd:'Cinzel',Georgia,serif;--fb:'Inter',-apple-system,sans-serif;--fm:'JetBrains Mono',monospace;
  --sw:272px;--r:4px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}html{scroll-behavior:smooth;}
body{font-family:var(--fb);background:var(--sb);color:var(--ink);font-size:16.3px;line-height:1.85;
  background-image:
    linear-gradient(135deg,rgba(184,115,51,.04) 0%,transparent 40%),
    repeating-linear-gradient(0deg,transparent,transparent 48px,rgba(221,201,168,.025) 48px,rgba(221,201,168,.025) 49px),
    radial-gradient(ellipse at 50% -5%,rgba(221,201,168,.11) 0,transparent 42%),
    radial-gradient(ellipse at 85% 85%,rgba(184,115,51,.1) 0,transparent 40%);
  background-attachment:fixed;position:relative;min-height:100vh;}
.progress-bar{position:fixed;top:0;left:0;height:4px;width:0%;background:linear-gradient(90deg,var(--stn2),var(--ocr2),var(--bpl2));z-index:200;transition:width .08s;box-shadow:0 0 10px rgba(221,201,168,.5);}
.page-layout{display:flex;min-height:100vh;position:relative;z-index:2;}
.sidebar{width:var(--sw);flex-shrink:0;background:linear-gradient(180deg,var(--sb2),var(--sb));border-right:1px solid var(--brd);position:sticky;top:0;height:100vh;overflow-y:auto;display:flex;flex-direction:column;scrollbar-width:thin;}
.sidebar-header{padding:28px 22px 22px;border-bottom:1px solid var(--brd);position:relative;overflow:hidden;}
/* Colonne ionique stylisée */
.sidebar-header::before{content:'';position:absolute;right:18px;top:18px;width:4px;height:50px;
  background:linear-gradient(180deg,var(--stn2),var(--stn));
  box-shadow:-8px 0 0 var(--stn),8px 0 0 var(--stn),0 50px 0 -2px var(--stn2),0 -4px 0 -1px var(--stn2);
  opacity:.52;}
.sidebar-header::after{content:'';position:absolute;bottom:-1px;left:22px;width:60px;height:2px;background:linear-gradient(90deg,var(--ocr2),var(--stn2));}
.sidebar-back{font-family:var(--fm);font-size:.6rem;letter-spacing:.14em;color:var(--ink3);text-decoration:none;display:block;margin-bottom:12px;position:relative;z-index:1;}
.sidebar-back:hover{color:var(--ocr2);}
.sidebar-title{font-family:var(--fd);font-size:1.6rem;font-weight:700;color:var(--stn2);line-height:1.02;letter-spacing:.04em;position:relative;z-index:1;text-transform:uppercase;}
.toc-nav{padding:10px 0 14px;flex:1;}
.toc-section-label{font-family:var(--fm);font-size:.58rem;letter-spacing:.22em;text-transform:uppercase;color:var(--ink3);padding:10px 22px 4px;}
.toc-link{display:block;padding:5px 22px 5px 26px;font-family:var(--fb);font-size:.82rem;color:var(--ink2);text-decoration:none;border-left:2px solid transparent;transition:all .18s;}
.toc-link:hover,.toc-link.active{color:var(--ocr2);border-left-color:var(--ocr2);background:var(--ocr-p);}
.sidebar-nav{padding:12px 22px;border-top:1px solid var(--brd);}
.sidebar-nav p{font-family:var(--fm);font-size:.56rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ink3);margin-bottom:7px;margin-top:10px;}
.sidebar-nav p:first-child{margin-top:0;}
.sidebar-nav a{display:block;font-family:var(--fb);font-size:.8rem;color:var(--ink3);text-decoration:none;padding:2px 0;}
.sidebar-nav a:hover,.sidebar-nav a.current{color:var(--ocr2);}
.sidebar-nav a.current{font-weight:700;}
.main{flex:1;min-width:0;padding:0 58px 100px;max-width:840px;}
.page-header{padding:58px 0 38px;margin-bottom:50px;border-bottom:1px solid var(--brd);position:relative;}
.page-header::before{content:'';position:absolute;top:58px;right:0;width:100px;height:4px;background:linear-gradient(90deg,transparent,var(--stn2),transparent);opacity:.6;}
.page-header::after{content:'';position:absolute;bottom:-1px;left:0;width:180px;height:2px;background:linear-gradient(90deg,var(--ocr2),var(--stn2),transparent);box-shadow:0 0 14px rgba(184,115,51,.35);}
.subject-tag{font-family:var(--fm);font-size:.62rem;letter-spacing:.22em;text-transform:uppercase;color:var(--ocr2);margin-bottom:12px;}
h1.page-title{font-family:var(--fd);font-size:3.35rem;font-weight:700;color:var(--ink);line-height:1;letter-spacing:.02em;text-transform:uppercase;}
h1.page-title .sub{color:var(--stn2);font-size:.95rem;display:block;margin-top:12px;font-family:var(--fb);font-style:italic;font-weight:400;letter-spacing:.01em;text-transform:none;}
.page-intro{margin-top:17px;font-size:1rem;color:var(--ink2);font-style:italic;max-width:540px;}
.section{margin-bottom:60px;scroll-margin-top:26px;}
h2.section-title{font-family:var(--fd);font-size:1.75rem;font-weight:700;color:var(--ink);margin-bottom:22px;padding-bottom:9px;border-bottom:1px solid var(--brd);display:flex;align-items:baseline;gap:14px;text-transform:uppercase;letter-spacing:.02em;}
h2.section-title .num{font-family:var(--fm);font-size:.7rem;color:var(--sb);background:var(--ocr2);padding:3px 11px;border-radius:2px;font-weight:500;letter-spacing:.05em;}
p{margin-bottom:.9em;}ul,ol{padding-left:1.4em;margin-bottom:.9em;}li{margin-bottom:.32em;}
strong{color:var(--stn2);font-weight:700;}em{color:var(--ocr2);}
.box{padding:16px 19px 14px;margin:16px 0;border-radius:var(--r);border:1px solid var(--brd);background:rgba(255,255,255,.03);}
.box-label{font-family:var(--fm);font-size:.62rem;font-weight:500;letter-spacing:.14em;text-transform:uppercase;display:block;margin-bottom:9px;}
.box.def{background:var(--stn-p);border-color:var(--stn-d);}.box.def .box-label{color:var(--stn2);}
.box.histoire{background:var(--ocr-p);border-left:4px solid var(--ocr2);}.box.histoire .box-label{color:var(--ocr2);}
.box.technique{background:var(--bpl-p);border-left:4px solid var(--bpl2);}.box.technique .box-label{color:var(--bpl2);}
.box.conseil{background:rgba(154,143,132,.09);border-left:4px solid var(--bet2);}.box.conseil .box-label{color:var(--bet2);}
.box.attention{background:rgba(194,105,63,.09);border-left:4px solid #c2693f;}.box.attention .box-label{color:#e88a5f;}
.box.chiffres{background:rgba(0,0,0,.38);border-color:var(--brdh);}.box.chiffres .box-label{color:var(--ocr2);}
.box.remark{background:transparent;border-left:3px solid var(--brd);padding-left:20px;}.box.remark .box-label{color:var(--ink3);}
.data-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:.89rem;overflow:hidden;border:1px solid var(--brd);border-radius:var(--r);}
.data-table th{background:rgba(45,39,32,.8);color:var(--stn2);padding:10px 14px;text-align:left;font-family:var(--fm);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;border-bottom:1px solid var(--brdh);}
.data-table td{padding:9px 14px;border-bottom:1px solid var(--brd);vertical-align:top;}
.data-table tr:hover td{background:var(--ocr-p);}.data-table td:first-child{font-family:var(--fm);font-size:.8rem;color:var(--ocr2);}
code{font-family:var(--fm);font-size:.82em;background:rgba(0,0,0,.4);color:var(--ocr2);padding:2px 6px;border-radius:2px;border:1px solid var(--brd);}
.mobile-header{display:none;position:sticky;top:0;z-index:50;background:var(--sb2);border-bottom:2px solid var(--ocr2);padding:12px 18px;align-items:center;justify-content:space-between;}
.mobile-menu-btn{background:none;border:none;color:var(--ocr2);font-size:1.3rem;cursor:pointer;}
.mobile-title{font-family:var(--fd);font-size:1rem;color:var(--stn2);font-weight:700;text-transform:uppercase;}
.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,.8);}
.drawer-panel{position:relative;z-index:1;width:272px;background:var(--sb2);height:100%;overflow-y:auto;padding:14px 0;border-right:1px solid var(--brd);}
@media(max-width:960px){.sidebar{display:none;}.mobile-header{display:flex;}.main{padding:0 20px 70px;}h1.page-title{font-size:2.3rem;}}