/* ========================================
   SECCIÓN RESEARCH (CAJAS DE FÓRMULAS LATEX)
   ======================================== */
.research-hero { padding: 80px 0 50px; }
.research-hero h1 { font-size: clamp(2.2rem, 6vw, 3.5rem); font-weight: 800; margin-bottom: 20px; line-height: 1.1; }
.hero-desc { color: var(--cloud-grey); max-width: 750px; font-size: 1.1rem; }

.formula-box {
    background: rgba(0, 209, 255, 0.05);
    border-radius: 8px;
    padding: 15px;
    margin: 15px 0;
    color: var(--electric-cyan);
    font-size: 0.9rem;
    text-align: center;
    overflow-x: auto; /* Permite scroll horizontal en móviles */
    border: 1px solid rgba(0, 209, 255, 0.1); /* Toque extra de diseño */
}

/* Reutilizamos la clase .cards-grid que ya existe para la cuadrícula */
.card-footer-research {
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.05);
}

@media (max-width: 768px) {
    .research-hero { padding: 50px 0 30px; }
    .research-hero h1 { font-size: 2rem; }
}

@media (max-width: 640px) {
    .research-hero { padding: 44px 0 24px; }
    .research-hero h1 { font-size: clamp(1.8rem, 8vw, 2.2rem); }
    .hero-desc { font-size: 0.975rem; }
    .cards-grid { gap: 16px; margin-top: 28px; }
    .card { padding: 24px 20px; }
}

@media (max-width: 480px) {
    .research-hero { padding: 36px 0 20px; }
    .research-hero h1 { font-size: clamp(1.6rem, 7vw, 1.9rem); }
    .hero-desc { font-size: 0.925rem; }
    .cards-grid { gap: 12px; }
    .card { padding: 20px 16px; border-radius: 10px; }
    .card h3 { font-size: 1.1rem; }
    .card p { font-size: 0.9rem; }
    .formula-box { padding: 12px; font-size: 0.85rem; }
}
/* ========================================
   LABORATORIO (TRES TARJETAS)
   ======================================== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.card {
    background: var(--slate-grey);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.05);
    transition: 0.3s;
    display: flex;
    flex-direction: column;
}

.card:hover {
    border-color: var(--electric-cyan);
    transform: translateY(-5px);
}

.card-link {
    color: var(--electric-cyan);
    text-decoration: none;
    font-weight: 800;
    font-size: 0.75rem;
}