*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --accent:#4f46e5;--accent2:#6366f1;
  --bg:#f1f5f9;--surface:#fff;--text:#0f172a;--text2:#64748b;--border:#e2e8f0;
  --shadow:0 1px 3px rgba(0,0,0,.07),0 1px 2px rgba(0,0,0,.05);
  --shadow-lg:0 8px 24px rgba(0,0,0,.12);
}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;display:flex;flex-direction:column}
a{text-decoration:none}
header{background:var(--accent);padding:20px 28px;display:flex;align-items:center;gap:16px;flex-shrink:0}
.h-logo{width:60px;height:60px;background:#fff;border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden;padding:6px}
.h-logo img{max-width:100%;max-height:100%;object-fit:contain}
.h-logo-text{font-size:22px;font-weight:900;color:var(--accent)}
.h-info h1{color:#fff;font-size:clamp(15px,3vw,22px);font-weight:700;line-height:1.2}
.h-info p{color:rgba(255,255,255,.7);font-size:13px;margin-top:3px}
.h-back{margin-left:auto;color:rgba(255,255,255,.85);font-size:12.5px;font-weight:600;padding:7px 14px;border:1px solid rgba(255,255,255,.35);border-radius:7px;transition:.15s;white-space:nowrap;flex-shrink:0}
.h-back:hover{background:rgba(255,255,255,.15);color:#fff}
main{flex:1;padding:28px 28px 40px;max-width:1100px;margin:0 auto;width:100%}
.section-label{font-size:10.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--text2);margin:28px 0 12px}
.section-label:first-child{margin-top:0}
/* School cards (index) */
.schools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.school-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s;display:flex;flex-direction:column;color:var(--text)}
.school-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.sc-top{height:5px;background:var(--cc,var(--accent))}
.sc-body{padding:18px 20px;display:flex;align-items:center;gap:14px;flex:1}
.sc-logo{width:60px;height:60px;object-fit:contain;flex-shrink:0;border-radius:8px}
.sc-logo-placeholder{width:60px;height:60px;background:var(--cc,var(--accent));border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0}
.sc-info h2{font-size:14px;font-weight:700;line-height:1.3}
.sc-info p{font-size:11.5px;color:var(--text2);margin-top:3px}
.sc-footer{padding:10px 20px;border-top:1px solid var(--border);font-size:12px;color:var(--cc,var(--accent));font-weight:600;display:flex;align-items:center;gap:5px}
/* Service cards (sub-portals) */
.services-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.svc-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px 14px;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s,border-color .15s;display:flex;flex-direction:column;align-items:center;text-align:center;gap:10px;color:var(--text)}
.svc-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--accent)}
.svc-icon{font-size:30px;line-height:1}
.svc-name{font-size:13px;font-weight:600;line-height:1.3}
/* Support banner */
.support-card{background:linear-gradient(135deg,var(--accent),var(--accent2,var(--accent)));border-radius:14px;padding:20px 24px;display:flex;align-items:center;gap:16px;color:#fff;margin-top:24px;box-shadow:var(--shadow-lg);transition:opacity .15s}
.support-card:hover{opacity:.9}
.support-icon{font-size:36px;flex-shrink:0}
.support-text h3{font-size:14px;font-weight:700}
.support-text p{font-size:12px;opacity:.75;margin-top:3px}
.support-arrow{margin-left:auto;font-size:20px;flex-shrink:0}
/* Two sub-nav (enseignant/élève) */
.subnav{display:flex;gap:10px;margin-bottom:24px}
.subnav-btn{flex:1;padding:12px;border:2px solid var(--border);border-radius:10px;text-align:center;font-size:13px;font-weight:600;color:var(--text2);transition:.15s}
.subnav-btn:hover,.subnav-btn.active{border-color:var(--accent);color:var(--accent);background:#fff;box-shadow:var(--shadow)}
/* Nuapp bar */
.nuapp-bar{background:#0f172a;padding:10px 28px;font-size:11px;color:#475569;display:flex;align-items:center;gap:6px;flex-shrink:0}
.nuapp-bar span{color:#94a3b8;font-weight:600}
@media(max-width:540px){
  header{padding:14px 16px}
  main{padding:18px 14px 32px}
  .services-grid{grid-template-columns:repeat(2,1fr)}
  .schools-grid{grid-template-columns:1fr}
  .support-card{flex-wrap:wrap}
  .subnav{flex-direction:column}
}