body{font-family:Arial,sans-serif;margin:0;background:#f4f6f8;color:#1f2937}
header{padding:32px;background:#111827;color:white}
header h1{margin:0 0 8px;font-size:30px}
main{max-width:1100px;margin:0 auto;padding:28px}
.card,.analytics{background:white;border-radius:16px;padding:20px;margin-bottom:22px;box-shadow:0 6px 20px rgba(0,0,0,.08)}
.badge{display:inline-block;padding:6px 10px;border-radius:999px;font-size:12px;font-weight:700}
.badge.ready{background:#dcfce7;color:#166534}
.badge.private{background:#fef3c7;color:#92400e}
.video{position:relative;padding-bottom:56.25%;height:0;overflow:hidden;border-radius:12px;background:#111}
.video iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:0}
.note{font-size:13px;color:#6b7280}
.demo{font-size:12px;font-weight:normal;color:#6b7280;margin-left:8px}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}
.kpi{background:#f8fafc;border-radius:12px;padding:16px;display:flex;flex-direction:column;gap:6px}
.kpi strong{font-size:26px}.kpi span{font-size:13px;color:#6b7280}
footer{text-align:center;padding:24px;color:#6b7280}input{width:100%;box-sizing:border-box;padding:12px;margin:8px 0 14px;border:1px solid #d1d5db;border-radius:10px;font-size:16px}
button{border:0;border-radius:10px;padding:11px 16px;font-weight:700;cursor:pointer;background:#111827;color:white;margin:6px 0}
label{font-weight:700;display:block;margin-top:8px}
a{color:#2563eb;font-weight:700;text-decoration:none}
a:hover{text-decoration:underline}
#otp-zone{margin-top:12px}
#student-card>.kpis{margin:16px 0}


/* B6.3 V0.5 answer feedback */
.real-answer[disabled]{cursor:not-allowed;opacity:.55;background:#6b7280;color:#fff}
.real-answer.answer-locked{background:#9ca3af!important;color:#fff!important;opacity:.55!important}
.real-answer.answer-unselected{background:#6b7280!important;color:#fff!important;opacity:.45!important}
.real-answer.answer-selected-correct{background:#15803d!important;color:#fff!important;opacity:1!important;box-shadow:0 0 0 3px rgba(21,128,61,.18)}
.real-answer.answer-selected-incorrect{background:#b91c1c!important;color:#fff!important;opacity:1!important;box-shadow:0 0 0 3px rgba(185,28,28,.18)}


/* PORTAL V0.6 — multi-quiz + corrections expliquées */
.activity-block{margin-top:22px}
.activity-progress{font-weight:700;color:#374151;margin:12px 0 18px}
.question-card{border:1px solid #e5e7eb;border-radius:14px;padding:18px;margin:16px 0;background:#fff}
.question-number{font-size:12px;font-weight:800;color:#2563eb;text-transform:uppercase;letter-spacing:.04em;margin-bottom:8px}
.answer-correct-reveal{background:#15803d!important;color:#fff!important;opacity:1!important;box-shadow:0 0 0 3px rgba(21,128,61,.14)}
.correction-box{margin-top:14px;padding:14px;border-radius:12px;line-height:1.5}
.correction-correct{background:#f0fdf4;border:1px solid #86efac;color:#166534}
.correction-incorrect{background:#fef2f2;border:1px solid #fca5a5;color:#991b1b}
.review-video{background:#2563eb!important;color:#fff!important;margin-top:6px}
.review-video:hover{background:#1d4ed8!important}

/* B7 teacher shortcut */
.teacher-access-link{display:inline-block;background:#2563eb;color:#fff!important;padding:11px 16px;border-radius:10px;font-weight:700;margin:6px 10px 6px 0;text-decoration:none!important}
.teacher-access-link:hover{background:#1d4ed8;text-decoration:none!important}
.targeted-recommendation{border:1px solid #dbe3ef;border-radius:12px;padding:14px 16px;margin:12px 0;background:#f8fafc}.targeted-recommendation strong{display:block;margin-bottom:6px}.targeted-recommendation p{margin:6px 0 10px}.targeted-review-btn{margin-top:6px}.recommendation-panel{margin-top:14px}

.course-switcher{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:12px;margin:12px 0 18px}.course-select{display:flex;flex-direction:column;align-items:flex-start;gap:5px;width:100%;text-align:left;background:#f7f9fc;color:#111827;border:1px solid #dbe3ef}.course-select.active{border:2px solid #111827;background:#eefbf4}.course-path{font-size:.78rem;font-weight:700;color:#166534}.resource-actions{display:flex;gap:10px;flex-wrap:wrap;margin:12px 0}.resource-open-link{display:inline-block;padding:10px 14px;border-radius:8px;background:#111827;color:white;text-decoration:none;font-weight:700}.resource-card h3{margin:.6rem 0}


/* B.10 V3 accessibility hardening */
.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{left:16px;top:16px;width:auto;height:auto;z-index:10000;background:#fff;color:#111827;padding:10px 14px;border-radius:8px;box-shadow:0 0 0 3px #2563eb}
:focus-visible{outline:3px solid #2563eb;outline-offset:3px}
footer{color:#374151;display:flex;justify-content:center;gap:10px;flex-wrap:wrap}
footer a{color:#1d4ed8}
.footer-links{display:inline-block}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.remember-device{font-weight:600;display:flex;align-items:flex-start;gap:8px}.remember-device input{width:auto;margin:3px 0 0}
@media(max-width:640px){main{padding:18px}.card{padding:16px}button,.teacher-access-link{min-height:44px}}


/* B.10 V4.4 mobile hardening */
*,*::before,*::after{box-sizing:border-box}
html,body{max-width:100%;overflow-x:hidden}
main,.teacher-main,.card,.analytics{min-width:0}
img,iframe{max-width:100%}
h1,h2,h3,p,label,a,button{overflow-wrap:anywhere}
@media(max-width:640px){
  header{padding:24px 18px}
  header h1{font-size:26px;line-height:1.15}
  main{padding:18px;max-width:100%;width:100%}
  .card,.analytics{width:100%;max-width:100%;min-width:0}
  .kpis{grid-template-columns:repeat(2,minmax(0,1fr))}
  .course-switcher{grid-template-columns:minmax(0,1fr)}
  .course-select,.real-answer,.question-card{min-width:0;max-width:100%}
  .real-answer{width:100%;white-space:normal;text-align:left}
  .resource-actions{align-items:stretch}
  .resource-actions>a,.resource-actions>button{width:100%;max-width:100%}
}
@media(max-width:380px){.kpis{grid-template-columns:1fr}}
@media(max-width:900px){button,.teacher-access-link,.resource-open-link{min-height:44px}}

/* V5.0 public website + self-registration */
.public-nav{max-width:1200px;margin:0 auto;padding:16px 24px;display:flex;align-items:center;justify-content:space-between;gap:18px}.public-nav .brand{font-size:20px;color:#111827}.public-nav>div{display:flex;flex-wrap:wrap;gap:14px;align-items:center}.public-nav a{color:#334155}.public-nav .nav-login{background:#111827;color:#fff;padding:9px 13px;border-radius:10px}.public-hero{background:linear-gradient(135deg,#0f172a,#1e3a8a);padding:64px 24px}.public-hero>div{max-width:1100px;margin:0 auto}.public-hero h1{font-size:clamp(34px,6vw,58px);max-width:900px;line-height:1.05;margin:12px 0 18px}.public-hero p{font-size:19px;max-width:760px;line-height:1.6;color:#e2e8f0}.eyebrow{text-transform:uppercase;letter-spacing:.1em;font-weight:800;color:#93c5fd}.public-main{max-width:1200px}.public-page-head{padding:48px max(24px,calc((100% - 1150px)/2));background:#0f172a}.public-page-head p{color:#cbd5e1}.public-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}.public-card{background:#fff;border-radius:16px;padding:24px;margin-bottom:22px;box-shadow:0 6px 20px rgba(0,0,0,.08)}.public-card h2{margin-top:0}.feature{border-left:5px solid #2563eb}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}.cta-primary,.cta-secondary{display:inline-block;padding:12px 18px;border-radius:10px;font-weight:800;text-decoration:none!important}.cta-primary{background:#2563eb;color:#fff!important}.cta-secondary{background:#fff;color:#0f172a!important}.step-no{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:#111827;color:#fff;font-weight:800}.steps{display:grid;gap:14px}.security-callout{border-left:5px solid #16a34a}.signup-box{border-top:1px solid #e2e8f0;margin-top:22px;padding-top:18px}.access-status{margin:12px 0 18px}.course-select small{font-weight:600;color:#64748b}.danger{background:#b91c1c!important}@media(max-width:760px){.public-nav{align-items:flex-start;flex-direction:column}.public-nav>div{gap:10px}.public-hero{padding:44px 20px}.public-page-head{padding:36px 20px}.hero-actions>a{width:100%;text-align:center}}