/* Timeline vertical */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 30px;
  margin: 40px auto;
  max-width: 700px;
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--color-borde);
}

.event {
  background: var(--color-blanco);
  padding: 20px 25px;
  border-radius: var(--radio);
  box-shadow: var(--sombra);
  position: relative;
  transition: transform 0.2s;
}

.event:hover {
  transform: translateX(5px);
}

.event::before {
  content: '';
  position: absolute;
  left: -33px;
  top: 20px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-blanco);
  border: 3px solid var(--color-primario);
}

.event h3 {
  margin-bottom: 8px;
  color: var(--color-secundario);
}

.event p {
  color: #64748b;
  font-size: 0.95rem;
}

/* Colores por categoría */
.academia::before { border-color: #ef4444; }
.clase::before { border-color: #3b82f6; }
.investigacion::before { border-color: #f59e0b; }
.personal::before { border-color: #22c55e; }
.cierre::before { border-color: #8b5cf6; }

/* Responsive */
@media (max-width: 600px) {
  .timeline {
    padding-left: 30px;
  }

  .event::before {
    left: -28px;
  }
}