/* montagne.css — Thème : Granit gris, neige cristalline, bleu ciel d'altitude, arêtes */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,500;0,600;0,700;1,400&family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');
:root {
  --sb:#0b121a;--sb2:#131c28;--surf:#1c2838;--surf2:#253349;
  --sky:#6e9cbd;--sky2:#8bb4d1;--sky-p:rgba(139,180,209,.12);--sky-d:rgba(139,180,209,.4);
  --gnt:#8a99a8;--gnt2:#a6b3c0;--gnt-p:rgba(166,179,192,.10);--gnt-d:rgba(166,179,192,.4);
  --snw:#e8eef4;--snw2:#f5faff;
  --ice:#4d7ba0;
  --rk:#4a5464;
  --ink:#e4ebf2;--ink2:rgba(228,235,242,.66);--ink3:rgba(228,235,242,.3);
  --brd:rgba(139,180,209,.22);--brdh:rgba(139,180,209,.46);
  --fd:'Cormorant Garamond',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:16.5px;line-height:1.85;
  background-image:
    linear-gradient(180deg,rgba(139,180,209,.14) 0%,transparent 32%),
    radial-gradient(ellipse at 50% 100%,rgba(74,84,100,.25) 0,transparent 55%),
    linear-gradient(170deg,transparent 55%,rgba(232,238,244,.03) 75%,transparent 92%);
  background-attachment:fixed;position:relative;min-height:100vh;}
body::before{content:'';position:fixed;bottom:0;left:0;right:0;height:140px;pointer-events:none;z-index:1;opacity:.25;
  background:
    linear-gradient(175deg,transparent 30%,var(--rk) 30% 45%,transparent 45% 55%,var(--rk) 55% 72%,transparent 72%),
    linear-gradient(180deg,transparent 85%,var(--snw2) 95%,transparent);
  clip-path:polygon(0 100%,8% 35%,18% 55%,28% 20%,38% 60%,50% 10%,60% 55%,72% 25%,82% 60%,92% 30%,100% 55%,100% 100%);}
.progress-bar{position:fixed;top:0;left:0;height:4px;width:0%;background:linear-gradient(90deg,var(--ice),var(--sky2),var(--snw));z-index:200;transition:width .08s;box-shadow:0 0 12px rgba(139,180,209,.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;background:linear-gradient(135deg,rgba(139,180,209,.12),transparent 70%);}
.sidebar-header::after{content:'';position:absolute;bottom:-1px;left:22px;width:54px;height:2px;background:linear-gradient(90deg,var(--ice),var(--snw));}
.sidebar-back{font-family:var(--fm);font-size:.6rem;letter-spacing:.14em;color:var(--ink3);text-decoration:none;display:block;margin-bottom:12px;}
.sidebar-back:hover{color:var(--sky2);}
.sidebar-title{font-family:var(--fd);font-size:2rem;font-weight:700;color:var(--snw2);line-height:1.0;letter-spacing:-.01em;}
.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:.83rem;color:var(--ink2);text-decoration:none;border-left:2px solid transparent;transition:all .18s;}
.toc-link:hover,.toc-link.active{color:var(--snw2);border-left-color:var(--sky2);background:var(--sky-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(--snw2);}
.sidebar-nav a.current{font-weight:600;}
.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:56px;right:0;width:160px;height:48px;opacity:.35;pointer-events:none;
  background:linear-gradient(180deg,transparent 60%,var(--snw2) 100%);
  clip-path:polygon(0 100%,15% 35%,30% 60%,50% 10%,70% 55%,85% 40%,100% 100%);}
.page-header::after{content:'';position:absolute;bottom:-1px;left:0;width:170px;height:2px;background:linear-gradient(90deg,var(--ice),var(--snw),transparent);box-shadow:0 0 14px rgba(139,180,209,.5);}
.subject-tag{font-family:var(--fm);font-size:.62rem;letter-spacing:.22em;text-transform:uppercase;color:var(--sky2);margin-bottom:12px;}
h1.page-title{font-family:var(--fd);font-size:3.9rem;font-weight:700;color:var(--snw2);line-height:.98;letter-spacing:-.02em;}
h1.page-title .sub{color:var(--sky2);font-size:1.08rem;display:block;margin-top:10px;font-family:var(--fd);font-style:italic;font-weight:500;letter-spacing:.02em;}
.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:2.1rem;font-weight:700;color:var(--snw2);margin-bottom:22px;padding-bottom:9px;border-bottom:1px solid var(--brd);display:flex;align-items:baseline;gap:14px;}
h2.section-title .num{font-family:var(--fm);font-size:.7rem;color:var(--sb);background:var(--sky2);padding:3px 11px;border-radius:2px;font-weight:500;box-shadow:0 0 8px rgba(139,180,209,.35);}
h3.sub-title{font-family:var(--fd);font-size:1.3rem;font-weight:700;color:var(--sky2);margin:26px 0 11px;}
p{margin-bottom:.9em;}ul,ol{padding-left:1.4em;margin-bottom:.9em;}li{margin-bottom:.32em;}
strong{color:var(--snw2);font-weight:600;}em{color:var(--sky2);}
.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(--sky-p);border-color:var(--sky-d);}.box.def .box-label{color:var(--sky2);}
.box.histoire{background:var(--gnt-p);border-left:4px solid var(--gnt2);}.box.histoire .box-label{color:var(--gnt2);}
.box.technique{background:rgba(77,123,160,.10);border-left:4px solid var(--ice);}.box.technique .box-label{color:#77a8d0;}
.box.conseil{background:rgba(232,238,244,.05);border-left:4px solid var(--snw2);}.box.conseil .box-label{color:var(--snw2);}
.box.attention{background:rgba(200,100,80,.09);border-left:4px solid #c86450;}.box.attention .box-label{color:#e48070;}
.box.chiffres{background:rgba(0,0,0,.35);border-color:var(--brdh);}.box.chiffres .box-label{color:var(--sky2);}
.box.remark{background:transparent;border-left:3px solid var(--brd);padding-left:20px;}.box.remark .box-label{color:var(--ink3);}
.detail-toggle{display:inline-flex;align-items:center;gap:6px;font-family:var(--fb);font-size:.88rem;color:var(--sky2);border:1px solid var(--sky-d);padding:4px 14px;border-radius:2px;cursor:pointer;background:transparent;margin-top:8px;transition:all .18s;user-select:none;}
.detail-toggle:hover{background:var(--sky2);color:var(--sb);}.detail-toggle .arrow{transition:transform .2s;}.detail-toggle.open .arrow{transform:rotate(90deg);}
.detail-content{max-height:0;overflow:hidden;transition:max-height .3s ease;}.detail-content.open{max-height:900px;}
.detail-inner{margin-top:10px;padding:13px 18px;background:rgba(0,0,0,.35);border:1px dashed var(--brd);border-radius:var(--r);color:var(--ink2);font-size:.93rem;}
.data-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:.88rem;overflow:hidden;border:1px solid var(--brd);border-radius:var(--r);}
.data-table th{background:rgba(74,84,100,.65);color:var(--snw2);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(--sky-p);}.data-table td:first-child{font-family:var(--fm);font-size:.8rem;color:var(--sky2);}
code{font-family:var(--fm);font-size:.82em;background:rgba(0,0,0,.35);color:var(--sky2);padding:2px 6px;border-radius:2px;border:1px solid var(--brd);}
.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(--sb2);border-bottom:2px solid var(--sky2);padding:12px 18px;align-items:center;justify-content:space-between;}
.mobile-menu-btn{background:none;border:none;color:var(--snw2);font-size:1.3rem;cursor:pointer;}
.mobile-title{font-family:var(--fd);font-size:1.15rem;color:var(--snw2);font-weight:700;}
.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,.78);}
.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:2.6rem;}.two-col{grid-template-columns:1fr;}body::before{display:none;}}