:root{--blue:#0070C0;--navy:#0B2545;--orange:#E8730C;--teal:#00A3A3;--red:#C00000;--green:#2E8B57;
--light:#EEF4FA;--border:#D0DCE8;--grey:#5B6B7F;--text:#1A1A1A;--bg:#F5F8FB}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.45}
h1,h2,h3{margin:0 0 .4em;color:var(--blue);font-weight:700}
button{font-family:inherit;font-size:15px;cursor:pointer;border-radius:8px;border:1px solid var(--border);background:#fff;padding:8px 14px}
button.primary{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:700}
button.warn{background:var(--orange);border-color:var(--orange);color:#fff;font-weight:700}
button:disabled{opacity:.45;cursor:not-allowed}
input,select{font-family:inherit;font-size:16px;padding:8px 10px;border:1px solid var(--border);border-radius:8px;background:#fff}
abbr{text-decoration:underline dotted var(--grey);cursor:help}
.hidden{display:none!important}
.topbar{background:var(--navy);color:#fff;display:flex;align-items:center;gap:18px;padding:10px 22px;flex-wrap:wrap}
.brand{font-weight:800;letter-spacing:.5px;font-size:20px}.brand span{color:var(--orange)}
.topbar .pill{background:rgba(255,255,255,.12);border-radius:20px;padding:4px 12px;font-size:14px}
.clock{font-size:26px;font-weight:800;margin-left:auto;font-variant-numeric:tabular-nums}
.timer{font-size:18px;font-weight:700;background:var(--orange);border-radius:8px;padding:4px 10px;min-width:72px;text-align:center}
.timer.low{background:var(--red)}
.wrap{max-width:1280px;margin:0 auto;padding:18px;display:grid;grid-template-columns:300px 1fr;gap:18px}
@media(max-width:900px){.wrap{grid-template-columns:1fr}.side{order:2}}
.card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:18px 20px;margin-bottom:16px}
.side .card{padding:14px 16px}
.side h3{font-size:16px}
.events{list-style:none;margin:0;padding:0;font-size:14px}
.events li{padding:6px 0;border-bottom:1px solid var(--light)}
.events b{color:var(--blue);margin-right:6px}
.gauge{margin:6px 0}.gauge .lbl{display:flex;justify-content:space-between;font-size:13px;color:var(--grey)}
.gauge .bar{height:9px;background:var(--light);border-radius:6px;overflow:hidden}
.gauge .bar i{display:block;height:100%;background:var(--blue)}
.total{font-size:22px;font-weight:800;color:var(--blue)}
.tag{display:inline-block;border-radius:6px;padding:3px 10px;font-size:13px;font-weight:700;color:#fff;background:var(--blue);margin-right:6px}
.tag.m2{background:var(--red)}.tag.role{background:var(--orange)}.tag.me{background:var(--teal)}
.steptitle{font-size:26px;margin:10px 0 6px}
.learn{background:var(--light);border-radius:10px;padding:12px 16px;margin:12px 0}
.learn b{color:var(--blue)}
.formula{font-family:"Cambria Math","Times New Roman",serif;font-size:21px;text-align:center;padding:10px;border:1px dashed var(--border);border-radius:10px;margin:12px 0;background:#fff}
.hint{color:var(--orange);font-weight:700;font-size:15px}
.question{font-weight:700;font-size:18px;margin:16px 0 10px}
.opts{display:grid;gap:10px}
.opt{display:flex;gap:10px;align-items:center;border:2px solid var(--border);border-radius:10px;padding:10px 14px;cursor:pointer;background:#fff}
.opt input{transform:scale(1.25)}
.opt.sel{border-color:var(--blue);background:var(--light)}
.answerbar{display:flex;gap:12px;align-items:center;margin-top:16px;flex-wrap:wrap}
.status{font-size:14px;color:var(--grey)}
.status.ok{color:var(--green);font-weight:700}
.lock{background:#FDEBDC;border-radius:10px;padding:10px 14px;margin-top:12px;font-size:14px}
.result{border-radius:12px;padding:14px 18px;margin-top:16px;border:2px solid var(--border)}
.result.ok{border-color:var(--green);background:#EAF6EF}.result.partial{border-color:var(--orange);background:#FDF1E6}
.result.ko,.result.none{border-color:var(--red);background:#FBEAEA}.result.pending{border-color:var(--blue);background:var(--light)}
.result .pts{font-size:24px;font-weight:800}
.attack{border-radius:12px;padding:14px 18px;margin-top:12px;color:#fff;font-weight:700}
.attack.blocked{background:var(--green)}.attack.partial{background:var(--orange)}.attack.breach{background:var(--red)}
.explain{margin-top:10px}
.slider{width:100%}
.sliderval{font-size:30px;font-weight:800;color:var(--blue);text-align:center}
table{border-collapse:collapse;width:100%}
th{background:var(--blue);color:#fff;text-align:left;padding:6px 8px;font-size:14px}
td{border-bottom:1px solid var(--border);padding:6px 8px;font-size:14px;vertical-align:top}
.grid-row{display:grid;grid-template-columns:1fr 210px;gap:10px;align-items:center;margin:6px 0}
.hist li{font-size:13px;padding:3px 0}
.fab{position:fixed;bottom:18px;z-index:40;border-radius:24px;padding:10px 16px;box-shadow:0 3px 10px rgba(0,0,0,.18);font-weight:700}
.fab-calc{right:18px;background:var(--blue);color:#fff;border-color:var(--blue)}
.fab-glo{right:190px}
.calc{position:fixed;right:18px;bottom:76px;width:290px;background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:0 8px 28px rgba(0,0,0,.22);z-index:50;padding:0 12px 12px}
.calc-head{display:flex;justify-content:space-between;align-items:center;padding:10px 2px;font-weight:700;color:var(--blue);cursor:move;user-select:none}
.calc-x{border:none;padding:2px 8px}
.calc-in{width:100%;font-size:18px}
.calc-out{font-size:22px;font-weight:800;text-align:right;padding:8px 2px;color:var(--navy);min-height:38px}
.calc-out.err{color:var(--red);font-size:14px}
.calc-keys{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.calc-keys button{padding:10px 0;font-size:17px;font-weight:700}
.calc-keys button[data-k="="]{background:var(--blue);color:#fff}
.calc-hist{font-size:12px;color:var(--grey);margin-top:6px}
.glossary{position:fixed;right:18px;bottom:76px;width:360px;max-height:65vh;overflow:auto;background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:0 8px 28px rgba(0,0,0,.22);z-index:45;padding:0 16px 12px}
.glossary dl{margin:8px 0}.glossary dt{font-weight:700;color:var(--blue)}.glossary dd{margin:2px 0 0;font-size:14px}
.join{max-width:860px;margin:30px auto;padding:0 18px}
.teams{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:10px}
.team{border:2px solid var(--border);border-radius:12px;padding:10px 12px;cursor:pointer;background:#fff}
.team.sel{border-color:var(--blue);background:var(--light)}
.team small{color:var(--grey)}
.roles{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
@media(max-width:700px){.roles{grid-template-columns:1fr}}
.role{border:2px solid var(--border);border-radius:12px;padding:12px;cursor:pointer;background:#fff}
.role.sel{border-color:var(--orange);background:#FDF1E6}
.err{color:var(--red);font-weight:700}
.board td.rank{font-weight:800;color:var(--blue)}
.mine td{background:#FDF1E6}

/* barre du haut toujours visible (chronomètre) */
.topbar{position:sticky;top:0;z-index:30;box-shadow:0 2px 6px rgba(0,0,0,.25)}

/* illustrations et narration */
.banner{display:block;width:100%;aspect-ratio:4/1;object-fit:cover;border-radius:10px;margin:0 0 14px;background:#0B2545}
.voicebar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:6px 0 10px}
.voicebar button{padding:6px 12px;font-size:14px}
.voicebar .playing{background:var(--orange);border-color:var(--orange);color:#fff}