@font-face{font-family:'Inter';font-weight:400;font-display:swap;src:url(fonts/inter-latin-400-normal.woff2) format('woff2')}
@font-face{font-family:'Inter';font-weight:500;font-display:swap;src:url(fonts/inter-latin-500-normal.woff2) format('woff2')}
@font-face{font-family:'Inter';font-weight:600;font-display:swap;src:url(fonts/inter-latin-600-normal.woff2) format('woff2')}
@font-face{font-family:'Space Grotesk';font-weight:500;font-display:swap;src:url(fonts/space-grotesk-latin-500-normal.woff2) format('woff2')}
@font-face{font-family:'Space Grotesk';font-weight:700;font-display:swap;src:url(fonts/space-grotesk-latin-700-normal.woff2) format('woff2')}
:root{--ink:#0E1B2C;--ink-2:#44536A;--line:#E3E8F0;--soft:#F4F7FB;--blue:#1456F0;--blue-d:#0D3FB8;--amber:#F7931E;--night:#0A1422;--ok:#128C7E;--bad:#B3261E;
--head:'Space Grotesk','Segoe UI',Helvetica,Arial,sans-serif;--body:'Inter','Segoe UI',Helvetica,Arial,sans-serif}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-padding-top:90px}
body{margin:0;font-family:var(--body);color:var(--ink);background:var(--soft);line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}
main{flex:1}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--head);line-height:1.15;letter-spacing:-.02em;margin:0;text-wrap:balance}
p{margin:0}
:focus-visible{outline:3px solid var(--amber);outline-offset:3px;border-radius:6px}
.wrap{max-width:1160px;margin:0 auto;padding:0 24px}
header.top{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--head);font-weight:700;font-size:22px;letter-spacing:-.03em;color:#0B2A6F}
.brand img{height:44px;width:auto}.brand b{color:#F58220}
.back{white-space:nowrap;font-weight:500;font-size:15px;color:var(--ink-2);background:none;border:0;cursor:pointer;font-family:inherit;padding:8px}.back:hover{color:var(--ink)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 22px;border-radius:999px;font-weight:600;font-size:15px;border:1.5px solid transparent;cursor:pointer;font-family:inherit;transition:transform .15s,background .15s}
.btn:hover{transform:translateY(-1px)}
.btn:disabled{opacity:.55;cursor:wait;transform:none}
.btn-p{background:var(--blue);color:#fff}.btn-p:hover{background:var(--blue-d)}
.btn-w{background:var(--ok);color:#fff}
.btn-o{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-s{padding:8px 14px;font-size:13.5px}
input,select{font:inherit;padding:13px 14px;border:1.5px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);width:100%}
input:focus,select:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 4px rgba(20,86,240,.14)}
label{display:grid;gap:6px;font-size:14px;font-weight:600}
.tag{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--blue)}
.tag::before{content:"";width:28px;height:2px;background:currentColor}
.err{color:var(--bad);font-size:14.5px;font-weight:500}
.muted{color:var(--ink-2);font-size:14.5px}

/* porte d'entrée */
.gate{background:var(--night);color:#fff;position:relative;overflow:hidden;padding:72px 0 96px;flex:1}
.gate::before{content:"";position:absolute;inset:0;background:radial-gradient(640px 380px at 85% 0%,rgba(20,86,240,.55),transparent 65%);pointer-events:none}
.gate .wrap{position:relative;display:grid;grid-template-columns:1fr minmax(0,440px);gap:56px;align-items:center}
.gate .tag{color:var(--amber)}
.gate h1{font-size:clamp(34px,5vw,56px);margin:18px 0 18px}
.gate .lead{color:#B9C4D6;font-size:18px;max-width:50ch}
.steps3{list-style:none;margin:30px 0 0;padding:0;display:grid;gap:14px;counter-reset:s}
.steps3 li{counter-increment:s;display:grid;grid-template-columns:34px 1fr;gap:12px;color:#D5DDEA;font-size:15.5px}
.steps3 li::before{content:counter(s);width:30px;height:30px;border-radius:50%;background:rgba(255,255,255,.1);display:grid;place-items:center;font-family:var(--head);font-weight:700;font-size:14px;color:var(--amber)}
.box{background:#fff;color:var(--ink);border-radius:22px;padding:30px;display:grid;gap:16px;box-shadow:0 30px 70px rgba(0,0,0,.35)}
.box h2{font-size:22px}
.code-in{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:20px;letter-spacing:.08em;text-transform:uppercase;text-align:center;padding:16px}
.box .btn{width:100%;padding:15px}

/* cours */
.c-head{background:var(--night);color:#fff;padding:34px 0 30px}
.c-head .tag{color:var(--amber)}
.c-head h1{font-size:clamp(26px,3.6vw,40px);margin:12px 0 18px}
.prog{display:flex;align-items:center;gap:14px;font-size:14px;color:#B9C4D6}
.prog i{flex:1;max-width:340px;height:8px;border-radius:8px;background:rgba(255,255,255,.14);overflow:hidden}
.prog b{display:block;height:100%;background:var(--amber);border-radius:8px;transition:width .4s}
.c-body>*{min-width:0}
.c-body{display:grid;grid-template-columns:300px 1fr;gap:32px;padding-top:32px;padding-bottom:80px;align-items:start}
.mods{list-style:none;margin:0;padding:8px;background:#fff;border:1px solid var(--line);border-radius:18px;position:sticky;top:96px;display:grid;gap:2px}
.mods button{width:100%;display:grid;grid-template-columns:30px 1fr;gap:10px;align-items:center;text-align:left;padding:12px;border:0;background:none;border-radius:12px;font:inherit;font-size:14.5px;font-weight:500;color:var(--ink-2);cursor:pointer}
.mods button:hover{background:var(--soft)}
.mods button[aria-current=true]{background:#E9F0FF;color:var(--ink)}
.mods .n{width:28px;height:28px;border-radius:50%;border:1.5px solid var(--line);display:grid;place-items:center;font-family:var(--head);font-weight:700;font-size:13px;background:#fff}
.mods .done .n{background:var(--ok);border-color:var(--ok);color:#fff}
.lesson{background:#fff;border:1px solid var(--line);border-radius:22px;padding:38px 40px}
.lesson .num{font-family:var(--head);font-weight:700;color:var(--blue);font-size:14px}
.lesson h2{font-size:clamp(24px,3vw,32px);margin:8px 0 22px}
.lesson h3{font-size:13px;font-family:var(--body);letter-spacing:.08em;text-transform:uppercase;color:var(--blue);font-weight:600;margin:28px 0 10px}
.lesson p{font-size:16.5px;color:#24344A;max-width:68ch}
.lesson p+p{margin-top:14px}
.goals{margin:0;padding:0;list-style:none;display:grid;gap:8px}
.goals li{display:grid;grid-template-columns:22px 1fr;gap:8px;font-size:15.5px}
.goals li::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--amber);margin-top:9px;justify-self:center}
pre{margin:0;background:var(--night);color:#D5DDEA;border-radius:14px;padding:18px 20px;overflow-x:auto;font:500 13.5px/1.7 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;tab-size:2}
.ex{background:#FFF6EA;border:1px solid #FBD9AE;border-radius:16px;padding:20px 22px}
.ex p{font-size:15.5px}
.l-nav{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:34px;padding-top:24px;border-top:1px solid var(--line)}
.fin{margin-top:24px;background:#E7F6F3;border:1px solid #B5E0D8;border-radius:16px;padding:20px 22px;font-size:15.5px}
.fin a{font-weight:600;text-decoration:underline}

/* admin */
.adm{padding-top:36px;padding-bottom:80px;display:grid;gap:24px}
.adm h1{font-size:30px}
.panel{background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px}
.panel h2{font-size:20px;margin-bottom:16px}
.g3{display:grid;grid-template-columns:1fr 1fr 1fr auto;gap:12px;align-items:end}
.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.stat{background:var(--soft);border-radius:14px;padding:14px 16px}
.stat b{font-family:var(--head);font-size:24px;display:block}
.stat span{font-size:13px;color:var(--ink-2)}
.result{background:#E7F6F3;border:1px solid #B5E0D8;border-radius:16px;padding:20px;display:grid;gap:12px;margin-top:18px}
.result .code{font:700 26px/1.2 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.06em}
.row-b{display:flex;gap:10px;flex-wrap:wrap}
table{width:100%;border-collapse:collapse;font-size:14.5px}
th{text-align:left;font-size:12px;letter-spacing:.07em;text-transform:uppercase;color:var(--ink-2);padding:8px 10px;border-bottom:1px solid var(--line)}
td{padding:11px 10px;border-bottom:1px solid var(--line);vertical-align:middle}
td.c{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-weight:600;white-space:nowrap}
.scroll{overflow-x:auto}
.warn{background:#FFF6EA;border:1px solid #FBD9AE;border-radius:14px;padding:14px 16px;font-size:14.5px}

footer{background:#060D17;color:#8D9BB1;font-size:13px;padding:22px 0}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
footer a:hover{color:#fff}
@media (max-width:900px){
  .gate .wrap,.c-body{grid-template-columns:1fr}
  .gate{padding:44px 0 64px}
  .mods{position:static;display:flex;overflow-x:auto;gap:6px}
  .mods li{flex:0 0 auto}
  .mods button{grid-template-columns:28px auto;white-space:nowrap}
  .lesson{padding:26px 22px}
  .g3{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr}
}
@media (max-width:560px){.wrap{padding:0 18px}.l-nav .btn{width:100%}.back span{display:none}}