:root{--bg:#f8fafc;--card:#fff;--text:#0f172a;--muted:#64748b;--primary:#4f46e5;--right:#16a34a;--wrong:#dc2626;--border:#e2e8f0;color:var(--text);background:var(--bg);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}@media (prefers-color-scheme:dark){:root{--bg:#0f172a;--card:#1e293b;--text:#f1f5f9;--muted:#94a3b8;--border:#334155}}*{box-sizing:border-box}body{background:var(--bg);margin:0}.app{max-width:560px;padding:16px;padding-top:max(16px, env(safe-area-inset-top));margin:0 auto}header{justify-content:space-between;align-items:center;gap:8px;display:flex}h1{margin:8px 0 16px;font-size:1.25rem}.score{color:var(--primary);font-weight:600}.muted{color:var(--muted);margin:0 0 8px;font-size:.9rem}.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:20px}.center{text-align:center}.big{margin:8px 0 16px;font-size:2.5rem;font-weight:700}.prompt{margin:0 0 16px;font-size:1.3rem;line-height:1.4}.options{gap:10px;display:grid}button{font:inherit;cursor:pointer;background:var(--primary);color:#fff;border:none;border-radius:12px;min-height:48px;padding:12px 16px;font-weight:600}.option{color:var(--text);border:2px solid var(--border);text-align:left;background:0 0}.option:not(:disabled):hover{border-color:var(--primary)}.option.right{border-color:var(--right);background:color-mix(in srgb, var(--right) 15%, transparent)}.option.wrong{border-color:var(--wrong);background:color-mix(in srgb, var(--wrong) 15%, transparent)}.option:disabled{cursor:default}.explanation{border-left:4px solid;border-radius:12px;margin-top:16px;padding:16px}.explanation.ok{border-color:var(--right)}.explanation.ko{border-color:var(--wrong)}.explanation p{margin:8px 0}.explanation ul{margin:8px 0 16px;padding-left:20px}.account{align-items:center;gap:8px;display:flex}.account .muted{margin:0}button.link{color:var(--primary);background:0 0;min-height:0;padding:8px}.tabs{grid-template-columns:1fr 1fr;gap:8px;margin-bottom:16px;display:grid}.tab{color:var(--muted);border:2px solid var(--border);background:0 0}.tab.active{color:var(--primary);border-color:var(--primary)}.form{gap:12px;display:grid}.form label{gap:6px;font-size:.95rem;font-weight:600;display:grid}.form input{font:inherit;border:2px solid var(--border);background:var(--bg);color:var(--text);border-radius:12px;min-height:48px;padding:12px}.form input:focus{border-color:var(--primary);outline:none}.form .muted{margin:-4px 0 0}.form-error{color:var(--wrong);margin:0}button:disabled{opacity:.6;cursor:default}.account{white-space:nowrap}.tab{padding:10px 8px}.social{gap:10px;margin-bottom:16px;display:grid}.social-button{border:2px solid var(--border);border-radius:12px;justify-content:center;align-items:center;gap:10px;min-height:48px;font-weight:600;text-decoration:none;display:flex}.social-button.google{color:#1f1f1f;background:#fff}.social-button.facebook{color:#fff;background:#1877f2;border-color:#1877f2}.divider{color:var(--muted);align-items:center;gap:12px;margin:6px 0 0;font-size:.9rem;display:flex}.divider:before,.divider:after{content:"";border-top:1px solid var(--border);flex:1}.account-card{gap:10px;margin-bottom:16px;display:grid}.account-card p{margin:0}button.danger{background:var(--wrong)}footer{text-align:center;margin-top:24px;font-size:.85rem}footer a{color:var(--muted)}