✅ Código CSS Mejorado
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/* === BASE === */
body {
  font-family: 'Poppins', sans-serif;
  scroll-behavior: smooth;
  background-color: #ffffff;
  color: #2c3e50;
  line-height: 1.6;
}

/* === ANIMACIONES DE ENTRADA === */
@keyframes fadeInUp {
  0% {
    opacity: 0;
    transform: translateY(40px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes zoomIn {
  0% {
    opacity: 0;
    transform: scale(0.95);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* === ELEMENTOS QUE SE ANIMAN AL HACER SCROLL === */
.scroll-animate {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.scroll-animate.visible {
  animation: fadeInUp 0.8s ease-out forwards;
}

/* === BOTONES CON EFECTO DE LUZ === */
.btn-animado {
  position: relative;
  overflow: hidden;
  transition: background-color 0.3s ease, transform 0.2s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border-radius: 9999px; /* fully rounded */
}
.btn-animado::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.2);
  transition: left 0.4s ease;
}
.btn-animado:hover {
  transform: translateY(-2px);
}
.btn-animado:hover::after {
  left: 100%;
}

/* === TARJETAS AL PASAR MOUSE === */
.card-hover {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border-radius: 0.75rem;
  background-color: #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}
.card-hover:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 14px 24px rgba(0, 0, 0, 0.1);
}

/* === HEADER CON SOMBRA EN SCROLL === */
.sticky-shadow {
  transition: box-shadow 0.3s ease-in-out, background-color 0.3s ease-in-out;
  background-color: #ffffff;
}
.sticky-shadow.scrolled {
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
}

/* === TITULOS CON SOMBRA SUAVE === */
h1, h2, h3 {
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.04);
  font-weight: 700;
}

/* === ENLACES EN FOOTER Y REDES === */
footer a {
  transition: color 0.3s ease, transform 0.3s ease;
}
footer a:hover {
  color: #e2e8f0;
  transform: translateY(-2px);
}