/* steppe.css — Thème : Vert olive des graminées, ciel infini, brun chaud du tchernoziom, vent couché dans l'herbe */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,500;0,700;1,400;1,600&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');
:root {
  --sb:#1b1a12;--sb2:#22201a;--surf:#2a271e;--surf2:#332f22;
  --grn:#9ca86e;--grn2:#b5c283;--grn-d:#7e8a55;--grn-p:rgba(156,168,110,.14);--grn-dd:rgba(156,168,110,.48);
  --cam:#c9a86a;--cam2:#dec28e;--cam-p:rgba(201,168,106,.10);--cam-d:rgba(201,168,106,.42);
  --sky:#a6b8c0;--sky-p:rgba(166,184,192,.10);
  --ink:#ecdfbf;--ink2:rgba(236,223,191,.66);--ink3:rgba(236,223,191,.32);
  --brd:rgba(236,223,191,.14);--brdh:rgba(236,223,191,.34);
  --fd:'Cormorant Garamond',Georgia,serif;--fb:'Inter',-apple-system,sans-serif;--fm:'JetBrains Mono',monospace;
  --sw:272px;--r:3px;
}
*,*::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,#3a4858 0%,#3a4858 30%,#2a321f 30%,#22201a 100%),
    radial-gradient(ellipse at 50% 28%,rgba(201,168,106,.18) 0,transparent 45%);
  background-size:100% 100vh, 100% 100%;background-attachment:fixed;background-repeat:no-repeat;
  position:relative;min-height:100vh;}
/* herbes couchées par le vent */
body::before{content:'';position:fixed;bottom:0;left:0;right:0;height:160px;pointer-events:none;z-index:1;
  background-image:
    repeating-linear-gradient(88deg,transparent 0,transparent 3px,rgba(156,168,110,.08) 3px,rgba(156,168,110,.08) 4px),
    repeating-linear-gradient(92deg,transparent 0,transparent 5px,rgba(201,168,106,.06) 5px,rgba(201,168,106,.06) 6px);
  opacity:.9;}
.progress-bar{position:fixed;top:0;left:0;height:4px;width:0%;background:linear-gradient(90deg,var(--grn),var(--cam),var(--grn2));z-index:200;transition:width .08s;}
.page-layout{display:flex;min-height:100vh;position:relative;z-index:2;}
.sidebar{width:var(--sw);flex-shrink:0;background:rgba(26,25,18,.92);backdrop-filter:blur(8px);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:34px 22px 24px;border-bottom:1px solid var(--brd);position:relative;}
.sidebar-header::after{content:'';position:absolute;bottom:-1px;left:22px;width:64px;height:2px;background:linear-gradient(90deg,var(--grn),var(--cam));}
.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(--grn2);}
.sidebar-title{font-family:var(--fd);font-size:2.15rem;font-weight:700;color:var(--grn2);line-height:1.0;letter-spacing:-.01em;font-style:italic;}
.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(--grn2);border-left-color:var(--grn);background:var(--grn-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(--cam);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(--grn2);}
.sidebar-nav a.current{font-weight:600;}
.main{flex:1;min-width:0;padding:0 58px 100px;max-width:840px;}
.page-header{padding:62px 0 40px;margin-bottom:50px;border-bottom:1px solid var(--brd);position:relative;}
.subject-tag{font-family:var(--fm);font-size:.62rem;letter-spacing:.22em;text-transform:uppercase;color:var(--grn);margin-bottom:12px;}
h1.page-title{font-family:var(--fd);font-size:4rem;font-weight:700;color:var(--ink);line-height:.98;letter-spacing:-.02em;font-style:italic;}
h1.page-title .sub{color:var(--grn2);font-size:1.1rem;display:block;margin-top:12px;font-family:var(--fb);font-style:normal;font-weight:400;letter-spacing:.04em;}
.page-intro{margin-top:18px;font-size:1rem;color:var(--ink2);max-width:560px;}
.section{margin-bottom:60px;scroll-margin-top:26px;}
h2.section-title{font-family:var(--fd);font-size:2.25rem;font-weight:700;color:var(--grn2);margin-bottom:22px;padding-bottom:9px;border-bottom:1px solid var(--brd);display:flex;align-items:baseline;gap:14px;font-style:italic;}
h2.section-title .num{font-family:var(--fm);font-style:normal;font-size:.7rem;color:var(--sb);background:var(--cam);padding:3px 11px;border-radius:2px;font-weight:500;letter-spacing:.05em;}
h3.sub-title{font-family:var(--fd);font-size:1.3rem;font-weight:700;color:var(--cam);margin:26px 0 11px;font-style:italic;}
p{margin-bottom:.9em;}ul,ol{padding-left:1.4em;margin-bottom:.9em;}li{margin-bottom:.32em;}
strong{color:var(--grn2);font-weight:600;}em{color:var(--cam2);}
.box{padding:16px 19px 14px;margin:16px 0;border-radius:var(--r);border:1px solid var(--brd);background:rgba(255,255,255,.025);}
.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(--grn-p);border-color:var(--grn-dd);}.box.def .box-label{color:var(--grn2);}
.box.histoire{background:var(--cam-p);border-left:4px solid var(--cam);}.box.histoire .box-label{color:var(--cam);}
.box.technique{background:var(--sky-p);border-left:4px solid var(--sky);}.box.technique .box-label{color:var(--sky);}
.box.conseil{background:rgba(180,200,120,.08);border-left:4px solid #b4c878;}.box.conseil .box-label{color:#c4d888;}
.box.attention{background:rgba(190,90,55,.10);border-left:4px solid #cc6a40;}.box.attention .box-label{color:#e48862;}
.box.chiffres{background:rgba(0,0,0,.35);border-color:var(--brdh);}.box.chiffres .box-label{color:var(--cam);}
.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(--cam);border:1px solid var(--cam-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(--cam);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:.89rem;overflow:hidden;border:1px solid var(--brd);border-radius:var(--r);}
.data-table th{background:rgba(156,168,110,.22);color:var(--grn2);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(--cam-p);}.data-table td:first-child{font-family:var(--fm);font-size:.8rem;color:var(--cam);}
code{font-family:var(--fm);font-size:.82em;background:rgba(0,0,0,.35);color:var(--grn2);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(--grn);padding:12px 18px;align-items:center;justify-content:space-between;}
.mobile-menu-btn{background:none;border:none;color:var(--grn2);font-size:1.3rem;cursor:pointer;}
.mobile-title{font-family:var(--fd);font-size:1.15rem;color:var(--grn2);font-weight:700;font-style:italic;}
.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:2.7rem;}.two-col{grid-template-columns:1fr;}body::before{height:80px;}}