:root{--bleu:#003a80;--bleu2:#0050a0;--clair:#7fb3ff;--fond:#f3f6fb;--texte:#1d2939;--gris:#667085;--bord:#e1e7ef;--rouge:#b42318}
*{box-sizing:border-box}
[hidden]{display:none!important}
body{margin:0;background:var(--fond);color:var(--texte);font:15px/1.5 system-ui,-apple-system,"Segoe UI",Arial,sans-serif}
.topbar{background:var(--bleu);color:#fff;padding:8px max(20px,calc((100% - 1240px)/2));display:flex;justify-content:space-between;align-items:center;gap:20px}
.brand{color:#fff;text-decoration:none;display:flex;align-items:center;gap:12px}
.brand .logo{display:block;border-radius:50%;background:#fff}
.brand-text{font-weight:800;font-size:20px;line-height:1.1}
.brand-text span{color:var(--clair)}
.brand-text small{display:block;font-size:11px;font-weight:400;letter-spacing:1.5px;text-transform:uppercase;opacity:.85}
.topbar nav{display:flex;gap:18px}.topbar nav a{color:#fff;text-decoration:none}
.container{max-width:1240px;margin:22px auto;padding:0 18px;min-height:75vh}
.footer{text-align:center;color:var(--gris);padding:25px}
.card{background:#fff;border:1px solid var(--bord);border-radius:14px;padding:22px;margin:15px 0;box-shadow:0 3px 12px #15294a0a}
.hero{display:flex;gap:24px;align-items:center;flex-wrap:wrap}
.btn,button{display:inline-block;background:var(--bleu2);color:#fff;border:0;border-radius:8px;padding:10px 16px;text-decoration:none;cursor:pointer;font:inherit;font-weight:600}
.btn:hover,button:hover{filter:brightness(1.1)}
button:disabled{opacity:.5;cursor:not-allowed}
.btn.secondary,button.secondary{background:#e8eef6;color:var(--bleu)}
.btn.danger,button.danger{background:var(--rouge);color:#fff}
.small-btn{padding:4px 9px;font-size:12px;border-radius:6px}
.link-btn{background:none;color:var(--gris);padding:0 6px;font-size:11px;font-weight:400;text-decoration:underline}
input,select,textarea{width:100%;padding:11px;border:1px solid #ccd5e1;border-radius:8px;margin:5px 0 14px;font:inherit;background:#fff}
input[type=checkbox]{width:auto;margin:0 6px 0 0}
label{font-weight:600}
label.check{display:inline-flex;align-items:center;font-weight:500;margin:0 14px 10px 0}
.inline-form{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.inline-form input[name=titre]{flex:1 1 280px;margin:0}
.inline-form .check{margin:0}
.linkbox{display:flex;gap:8px}.linkbox input{margin:0}
.row-line{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:6px 0;border-bottom:1px solid #eef1f5}
.muted{color:var(--gris)}.small{font-size:12px}
.alert{padding:12px;border-radius:8px;background:#fff3cd;color:#725500}
.alert.success{background:#e5f7ec;color:#17653a}.alert.info{background:#e8f1fb;color:#17548a}
.course{display:flex;justify-content:space-between;gap:15px;align-items:center;flex-wrap:wrap}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.tag{display:inline-block;padding:2px 9px;border-radius:20px;background:#e8f1fb;color:#17548a;font-size:12px;font-weight:600}
.tag.live{background:#fde8e8;color:var(--rouge)}
.tag.danger{background:#fde8e8;color:var(--rouge)}
.live-card{border-color:#f3b4b4;background:linear-gradient(90deg,#fff,#fff6f6)}
.live-card h2{margin:6px 0 2px}

/* ---- salle ---- */
.room-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap}
.room-head h1{margin:0 0 2px;font-size:22px}
.room-badges{display:flex;gap:8px}
.room{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:16px;align-items:start}
.stage{position:relative;background:#0b1b33;border-radius:12px;overflow:hidden;aspect-ratio:16/9;min-height:260px}
.stage video{position:absolute;top:0;left:0;right:0;bottom:0;width:100%;height:100%;object-fit:contain;background:#0b1b33}
.stage-empty{position:absolute;top:0;left:0;right:0;bottom:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;color:#cfe0ff;text-align:center;padding:20px}
.stage-empty img{background:#fff;border-radius:50%;opacity:.95}
.stage-btn{position:absolute;right:10px;bottom:10px;background:#000a;font-size:12px;padding:6px 10px}
.stage-btn.center{right:auto;bottom:auto;left:50%;top:50%;transform:translate(-50%,-50%);font-size:16px;padding:12px 18px}
.controls{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:12px}
.ctl-group{display:inline-flex;gap:8px;align-items:center;flex-wrap:wrap}
.inline-select{display:inline-flex;align-items:center;gap:6px;font-weight:500;font-size:13px}
.inline-select select{width:auto;margin:0;padding:7px}
.controls .check{margin:0}
.status{min-height:22px;margin:8px 0 0;color:var(--gris);font-size:13px}.status.bad{color:var(--rouge)}
.room-side{display:flex;flex-direction:column;gap:12px}
.side-box{background:#fff;border:1px solid var(--bord);border-radius:12px;padding:14px}
.side-box h2{margin:0 0 8px;font-size:16px}
.roster{max-height:300px;overflow:auto}
.roster-row{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap;padding:6px 4px;border-bottom:1px solid #eef1f5}
.roster-row.raised{background:#fff8e1}
.roster-name{font-weight:600}
.roster-btns{display:flex;gap:4px;flex-wrap:wrap}
.chat-log{height:280px;overflow:auto;border:1px solid var(--bord);border-radius:8px;padding:8px;margin-bottom:8px;background:#fcfdff}
.chat-msg{padding:5px 0;border-bottom:1px solid #eef1f5;overflow-wrap:anywhere}
.chat-msg.role-enseignant{background:#eef5ff;margin:0 -4px;padding:5px 4px;border-radius:6px}
.chat-text{white-space:pre-wrap}
#chat-form{display:flex;gap:6px}#chat-form input{margin:0}
.join-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#0b1b33ee;display:flex;align-items:center;justify-content:center;z-index:50;padding:16px}
.join-card{background:#fff;border-radius:16px;padding:28px;max-width:460px;text-align:center}
.join-card img{background:#fff;border-radius:50%}
.join-card button,.join-card .btn{margin-top:10px;font-size:17px;padding:12px 22px}
@media(max-width:900px){.room{grid-template-columns:1fr}.chat-log{height:220px}.topbar{padding:8px 14px}}
.roster-row.speaking .roster-name::after{content:" 🔊";color:#17653a}

/* ---- ardoise ---- */
.board{margin-bottom:6px}
.board-bar{display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center;background:#fff;border:1px solid var(--bord);border-radius:10px;padding:8px 10px;margin-bottom:8px}
.bgrp{display:inline-flex;gap:6px;align-items:center;flex-wrap:wrap}
.board-bar button.tool.active{background:var(--bleu);color:#fff}
.swatch{width:30px;height:30px;padding:0;border-radius:50%;border:3px solid #fff;box-shadow:0 0 0 1px #99a6b8}
.swatch.active{box-shadow:0 0 0 3px var(--bleu2)}
.board-bar input[type=range]{width:110px;margin:0}
.board-wrap{position:relative;width:100%;height:0;padding-top:56.25%;background:#fff;border:1px solid var(--bord);border-radius:10px;overflow:hidden}
.board-wrap canvas{position:absolute;top:0;left:0;width:100%;height:100%}
#board-ink{touch-action:none;cursor:crosshair}
.pagebar{background:#eef4fc;border-radius:8px;padding:4px 8px}.pagebar strong{min-width:84px;text-align:center}
.rxinfo{flex-basis:100%;color:var(--gris);min-height:0}.rxinfo.ok{color:#17653a}.rxinfo.bad{color:var(--rouge)}.rxinfo:empty{display:none}