:root{--fa-bg:#e8eef6;--fa-bg-2:#dfe8f3;--fa-surface:#fff;--fa-surface-2:#f1f5f9;--fa-surface-3:#e2e8f0;--fa-border:#e2e8f0;--fa-text:#0f172a;--fa-muted:#64748b;--fa-accent:#2563eb;--fa-accent-hover:#1d4ed8;--fa-accent-soft:#2563eb1a;--fa-nav:#0f172a;--fa-radius:14px;--fa-radius-sm:10px;--fa-shadow:0 4px 24px #0f172a0f;--fa-shadow-lg:0 20px 50px #0f172a1f}*,:before,:after{box-sizing:border-box}body{background:radial-gradient(ellipse 120% 80% at 100% 0%, #6366f114, transparent 50%), radial-gradient(ellipse 80% 60% at 0% 100%, #2563eb0f, transparent 45%), linear-gradient(180deg, var(--fa-bg) 0%, var(--fa-bg-2) 100%);color:var(--fa-text);-webkit-font-smoothing:antialiased;margin:0;font-family:DM Sans,system-ui,-apple-system,sans-serif;line-height:1.55}.inicio{color:#fff;background:linear-gradient(135deg,#0f172ae0 0%,#1e3a8abf 50%,#0f172ae6 100%),url(https://images.unsplash.com/photo-1523240795612-9a054b0db644) 50%/cover 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#94a3b873;font-size:.82rem;line-height:1.45}.auth-diagnostico--modus_tollens{color:#7f1d1d;background:#fef2f2;border-color:#fecaca}.auth-diagnostico--servidor_no_disponible{color:#9a3412;background:#fff7ed;border-color:#fdba74}.auth-diagnostico--validacion{color:#78350f;background:#fffbeb;border-color:#fde68a}.auth-diagnostico--modus_ponens{color:#065f46;background:#ecfdf5;border-color:#a7f3d0}.auth-diagnostico-titulo{letter-spacing:.01em}.view-panel-header{border-bottom:1px solid #94a3b847;margin-bottom:.25rem;padding-bottom:.75rem}.view-panel-title{letter-spacing:-.03em;color:#0f172a;font-size:1.35rem;font-weight:800}.view-panel-sub{color:var(--fa-muted)}.view-panel--aula .view-panel-title{color:#0f766e}.preguntas-toolbar{border-radius:var(--fa-radius-sm);background:#ffffffbf;border:1px solid #94a3b859;padding:.85rem 1rem;box-shadow:0 2px 12px #0f172a0a}.preguntas-pager{background:#f1f5f9e6;border:1px solid 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var(--fa-border);margin-top:1rem;padding-top:1rem;padding-left:.25rem}.answers-title{text-transform:uppercase;letter-spacing:.08em;color:var(--fa-muted);margin-bottom:.65rem;font-size:.72rem;font-weight:700}.answer-item{background:var(--fa-surface-2);border:1px solid var(--fa-border);border-radius:var(--fa-radius-sm);color:#334155;border-left:3px solid #10b981;margin-bottom:.5rem;margin-left:4px;padding:.75rem 1rem;font-size:.92rem}.question-card textarea.form-control{border-color:var(--fa-border);border-radius:var(--fa-radius-sm)}.admin-actions{flex-wrap:wrap;gap:8px;display:flex}.icon-btn{border:1px solid var(--fa-border);border-radius:var(--fa-radius-sm);background:var(--fa-surface);cursor:pointer;justify-content:center;align-items:center;width:38px;height:38px;font-size:1rem;transition:transform .15s,box-shadow 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