:root{
  --primary:#438ecc; --secondary:#6165ab; --danger:#e3514e; --success:#2f9e5f; --warning:#e5a33a; --neutral:#506975;
  --bg:#f4f7fb; --card:#ffffff; --text:#1f2a33; --muted:#5f6f7a; --border:#dbe4ee; --light:#dfeaf5; --light2:#cfe0f0;
  --radius:14px; --shadow:0 4px 18px rgba(31,42,51,.08);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){ --bg:#121a22; --card:#1b2630; --text:#e8eef4; --muted:#9fb0bf; --border:#2b3a48; --light:#1f3243; --light2:#24394d; --shadow:0 4px 18px rgba(0,0,0,.35); }
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:Inter,"Segoe UI",system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;min-height:100vh;display:flex;flex-direction:column}
a{color:var(--primary)}
button{font:inherit}
.topbar{background:linear-gradient(90deg,var(--secondary) 0%,var(--primary) 100%);color:#fff;position:sticky;top:0;z-index:10;box-shadow:0 2px 10px rgba(0,0,0,.15)}
.topbar-inner{max-width:1100px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:600}
.brand-badge{background:#fff;color:var(--secondary);border-radius:8px;padding:2px 8px;font-weight:800;letter-spacing:.5px}
.brand-text{font-size:.95rem}
.nav{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.nav a,.nav button{color:#fff;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);padding:6px 12px;border-radius:999px;text-decoration:none;font-size:.9rem;cursor:pointer}
.nav a.active{background:#fff;color:var(--secondary);font-weight:600}
.nav .who{opacity:.9;font-size:.9rem;padding:0 6px}
.container{max-width:1100px;margin:0 auto;padding:24px 16px 48px;width:100%;flex:1}
.footer{text-align:center;color:var(--muted);font-size:.8rem;padding:16px}
h1{font-size:1.6rem;margin:0 0 6px;color:var(--primary)}
h2{font-size:1.25rem;margin:0 0 8px;color:var(--primary)}
h3{font-size:1.05rem;margin:0 0 6px}
p{margin:0 0 10px}
.muted{color:var(--muted)}
.small{font-size:.85rem}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.grid{display:grid;gap:16px}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid-blocks{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--primary);color:#fff;border:0;border-radius:10px;padding:10px 16px;font-weight:600;cursor:pointer;text-decoration:none;transition:filter .15s}
.btn:hover{filter:brightness(1.07)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.secondary{background:var(--secondary)}
.btn.ghost{background:transparent;color:var(--primary);border:1px solid var(--primary)}
.btn.danger{background:var(--danger)}
.btn.success{background:var(--success)}
.btn.sm{padding:6px 10px;font-size:.85rem;border-radius:8px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.spread{justify-content:space-between}
input[type=text],input[type=password]{width:100%;padding:11px 12px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text);font-size:1rem}
label{display:block;font-weight:600;margin:12px 0 6px;font-size:.92rem}
.login-wrap{max-width:460px;margin:30px auto}
.hero{background:linear-gradient(135deg,var(--light) 0%,var(--light2) 100%);border-radius:var(--radius);padding:22px 24px;margin-bottom:20px;border:1px solid var(--border)}
.hero h1{color:var(--secondary)}
.pill{display:inline-block;padding:2px 10px;border-radius:999px;font-size:.78rem;font-weight:600;background:var(--light);color:var(--secondary)}
.pill.ok{background:rgba(47,158,95,.15);color:var(--success)}
.pill.ko{background:rgba(227,81,78,.15);color:var(--danger)}
.pill.warn{background:rgba(229,163,58,.18);color:#9a6512}
.pill.locked{background:rgba(80,105,117,.15);color:var(--neutral)}
.block-card{display:flex;flex-direction:column;gap:8px;position:relative}
.block-card .num{font-size:.78rem;font-weight:700;color:var(--muted);letter-spacing:.5px}
.block-card h3{min-height:2.6em}
.block-card .en{font-size:.82rem;color:var(--muted);font-style:italic}
.score-line{display:flex;align-items:center;justify-content:space-between;font-size:.9rem}
.bar{height:8px;background:var(--light);border-radius:999px;overflow:hidden}
.bar > span{display:block;height:100%;background:var(--primary);border-radius:999px;transition:width .4s}
.bar.ok > span{background:var(--success)}
.bar.ko > span{background:var(--danger)}
.final-card{border-left:5px solid var(--secondary)}
/* quiz */
.quiz{display:grid;grid-template-columns:1fr 280px;gap:18px}
@media (max-width:860px){.quiz{grid-template-columns:1fr}.quiz .side{order:-1}}
.qhead{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px;flex-wrap:wrap}
.qtext{font-size:1.1rem;font-weight:600;margin:6px 0 16px;line-height:1.45}
.options{display:flex;flex-direction:column;gap:10px}
.opt{display:flex;gap:12px;align-items:flex-start;border:2px solid var(--border);border-radius:12px;padding:12px 14px;background:var(--card);cursor:pointer;text-align:left;color:var(--text);width:100%;transition:border-color .15s,background .15s}
.opt:hover{border-color:var(--primary)}
.opt.selected{border-color:var(--primary);background:var(--light)}
.opt .letter{flex:0 0 28px;height:28px;border-radius:50%;background:var(--light);color:var(--secondary);font-weight:700;display:flex;align-items:center;justify-content:center;font-size:.9rem}
.opt.selected .letter{background:var(--primary);color:#fff}
.opt.correct{border-color:var(--success);background:rgba(47,158,95,.10)}
.opt.correct .letter{background:var(--success);color:#fff}
.opt.wrong{border-color:var(--danger);background:rgba(227,81,78,.10)}
.opt.wrong .letter{background:var(--danger);color:#fff}
.timer{font-variant-numeric:tabular-nums;font-size:2rem;font-weight:800;text-align:center;color:var(--secondary);padding:8px 0}
.timer.low{color:var(--danger);animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.55}}
.navgrid{display:grid;grid-template-columns:repeat(8,1fr);gap:6px;margin:10px 0}
.navgrid button{aspect-ratio:1;border-radius:8px;border:1px solid var(--border);background:var(--card);color:var(--text);cursor:pointer;font-weight:600;font-size:.85rem;position:relative}
.navgrid button.answered{background:var(--primary);color:#fff;border-color:var(--primary)}
.navgrid button.current{outline:3px solid var(--secondary);outline-offset:1px}
.navgrid button.flagged::after{content:"";position:absolute;top:3px;right:3px;width:8px;height:8px;border-radius:50%;background:var(--warning)}
.legend{font-size:.78rem;color:var(--muted);display:flex;gap:10px;flex-wrap:wrap}
.legend span::before{content:"";display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:4px;vertical-align:middle;background:var(--primary)}
.legend .l-flag::before{background:var(--warning);border-radius:50%}
.legend .l-empty::before{background:var(--card);border:1px solid var(--border)}
.flagbtn{background:transparent;border:1px solid var(--border);border-radius:8px;padding:6px 10px;cursor:pointer;color:var(--text)}
.flagbtn.on{border-color:var(--warning);background:rgba(229,163,58,.15)}
.side .card{position:sticky;top:76px}
/* results */
.scorebox{display:flex;gap:20px;align-items:center;flex-wrap:wrap}
.bigscore{font-size:3rem;font-weight:800;line-height:1}
.bigscore.ok{color:var(--success)}.bigscore.ko{color:var(--danger)}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{padding:8px 10px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}
th{color:var(--muted);font-weight:600;font-size:.82rem;text-transform:uppercase;letter-spacing:.4px}
tr:hover td{background:rgba(67,142,204,.05)}
.review-q{border-top:1px solid var(--border);padding:16px 0}
.review-q .qtext{font-size:1rem}
.explain{background:var(--light);border-left:4px solid var(--primary);padding:10px 14px;border-radius:0 10px 10px 0;margin-top:10px;font-size:.92rem}
.cell-score{font-weight:700;border-radius:6px;padding:2px 6px;display:inline-block;min-width:44px;text-align:center}
.cs-ok{background:rgba(47,158,95,.15);color:var(--success)}.cs-ko{background:rgba(227,81,78,.15);color:var(--danger)}.cs-na{color:var(--muted)}
.toggle{display:inline-flex;align-items:center;gap:8px;cursor:pointer;padding:6px 10px;border:1px solid var(--border);border-radius:999px;font-size:.88rem;user-select:none}
.toggle input{accent-color:var(--primary)}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:var(--text);color:var(--bg);padding:10px 18px;border-radius:999px;box-shadow:var(--shadow);font-size:.92rem;z-index:50}
.toast.err{background:var(--danger);color:#fff}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.kpi{background:var(--light);border-radius:12px;padding:12px 14px}
.kpi .v{font-size:1.6rem;font-weight:800;color:var(--secondary)}
.kpi .l{font-size:.8rem;color:var(--muted)}
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:40;padding:16px}
.modal{background:var(--card);border-radius:var(--radius);padding:22px;max-width:520px;width:100%;box-shadow:var(--shadow)}
.tabs{display:flex;gap:6px;border-bottom:1px solid var(--border);margin-bottom:14px;flex-wrap:wrap}
.tabs button{background:transparent;border:0;border-bottom:3px solid transparent;padding:8px 12px;cursor:pointer;color:var(--muted);font-weight:600}
.tabs button.active{color:var(--primary);border-bottom-color:var(--primary)}
.notice{border:1px dashed var(--border);border-radius:12px;padding:12px 14px;color:var(--muted);font-size:.9rem}
ul.clean{margin:0;padding-left:18px}
.sr-only{position:absolute;left:-9999px}
/* quiz lancé par le formateur */
.pill.live{background:rgba(227,81,78,.14);color:var(--danger);animation:pulse 1.6s infinite}
.block-card.is-live{border-color:var(--danger);box-shadow:0 0 0 3px rgba(227,81,78,.15)}
.live-card{border-left:5px solid var(--danger);margin-bottom:16px}
.live-card.done{border-left-color:var(--neutral)}
.live-admin.on{border-color:var(--danger)}
select{padding:9px 12px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text);font:inherit}
/* bilingue */
.lang-switch{display:inline-flex;border:1px solid var(--border);border-radius:999px;overflow:hidden;background:var(--card)}
.lang-switch button{background:transparent;border:0;padding:5px 11px;cursor:pointer;color:var(--muted);font-weight:600;font-size:.8rem;border-right:1px solid var(--border)}
.lang-switch button:last-child{border-right:0}
.lang-switch button.active{background:var(--primary);color:#fff}
.qtext.fr{font-weight:500;color:var(--muted);margin-top:-10px;font-size:1rem}
.opt .fr{display:block;color:var(--muted);font-size:.88rem;margin-top:3px}
.opt.selected .fr,.opt.correct .fr,.opt.wrong .fr{color:var(--text);opacity:.8}
.bank-q .qtext{font-size:1rem}
.bank-q .opt{padding:8px 12px;cursor:default}
.bank-q .opt .letter{flex-basis:24px;height:24px;font-size:.8rem}
@media print{.topbar,.footer,.tabs,.lang-switch,.btn,input,#bank-count,.toast{display:none!important}.card{box-shadow:none;border:0;padding:0;margin:0 0 12px}.bank-q{break-inside:avoid;page-break-inside:avoid}body{background:#fff;color:#000}.container{max-width:none;padding:0}}