.modelo {
  position: relative;
  padding-block: clamp(6rem, 14vw, 11rem);
  background: var(--color-black);
  border-top: 1px solid var(--color-white-a08);
  overflow: hidden;
}

/* Resplandor de fondo sutil: diferencia esta sección como "statement" */
.modelo::before {
  content: "";
  position: absolute;
  top: -10%;
  left: 50%;
  width: 1200px;
  height: 900px;
  transform: translateX(-50%);
  background: radial-gradient(circle, var(--color-gold-a15) 0%, transparent 62%);
  pointer-events: none;
}

.modelo__inner {
  position: relative;
  z-index: 1;
  max-width: 900px;
}

.modelo__inner .eyebrow { display: block; margin-bottom: 1.75rem; }

.modelo__title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6.6vw, 5.25rem);
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: var(--color-white);
  margin-bottom: 2rem;
}
.modelo__title .accent { color: var(--color-gold); }

.modelo__text {
  color: var(--color-warm-grey);
  font-size: var(--fs-body-lg);
  line-height: var(--lh-normal);
  max-width: 52ch;
}

/* ---- Red abstracta de conexión ---- */
.modelo__network {
  position: relative;
  margin-top: clamp(4.5rem, 9vw, 7rem);
  margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
}

.modelo__path-wrap {
  position: relative;
  height: 120px;
}
.modelo__path-wrap svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}
.modelo__path {
  fill: none;
  stroke: var(--color-gold);
  stroke-opacity: 0.55;
  stroke-width: 1.5;
  stroke-dasharray: 1400;
  stroke-dashoffset: 1400;
  transition: stroke-dashoffset 1.4s var(--ease-elegant);
}
.modelo__network.is-visible .modelo__path {
  stroke-dashoffset: 0;
}

.modelo__dot {
  position: absolute;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-black);
  border: 1.5px solid var(--color-gold);
  transform: translate(-50%, -50%) scale(0);
  transition: transform var(--dur-slow) var(--ease-elegant);
  transition-delay: 0.5s;
}
.modelo__dot--1 { left: 2%; top: 78%; }
.modelo__dot--2 { left: 50%; top: 12%; }
.modelo__dot--3 { left: 98%; top: 46%; }
.modelo__network.is-visible .modelo__dot { transform: translate(-50%, -50%) scale(1); }
.modelo__network.is-visible .modelo__dot--2 { transition-delay: 0.75s; }
.modelo__network.is-visible .modelo__dot--3 { transition-delay: 1s; }

.modelo__nodes {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
}
.modelo__node {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.modelo__node:nth-child(1) { align-items: flex-start; text-align: left; }
.modelo__node:nth-child(2) { align-items: center; text-align: center; }
.modelo__node:nth-child(3) { align-items: flex-end; text-align: right; }

.modelo__node-index {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: var(--ls-wide);
  color: var(--color-gold);
}
.modelo__node-label {
  font-family: var(--font-display);
  font-size: clamp(1rem, 1.6vw, 1.25rem);
  color: var(--color-white);
  font-weight: 600;
}

/* ---- Mensaje final ---- */
.modelo__closing {
  margin-top: clamp(4rem, 8vw, 6rem);
  padding-top: clamp(2.5rem, 5vw, 3.5rem);
  border-top: 1px solid var(--color-white-a08);
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.4vw, 3.25rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--color-white);
}
.modelo__closing .accent { color: var(--color-gold); }

/* ---- Tablet ---- */
@media (max-width: 1080px) {
  .modelo__path-wrap { display: none; }
  .modelo__network { margin-top: clamp(3rem, 6vw, 4rem); }
  .modelo__nodes {
    flex-direction: column;
    gap: 1.75rem;
  }
  .modelo__node,
  .modelo__node:nth-child(2),
  .modelo__node:nth-child(3) {
    align-items: flex-start;
    text-align: left;
  }
}

/* ---- Móvil: conector vertical entre los 3 conceptos ---- */
@media (max-width: 640px) {
  .modelo__nodes {
    position: relative;
    padding-left: 1.75rem;
  }
  .modelo__node {
    position: relative;
    padding-bottom: clamp(1.5rem, 6vw, 2rem);
  }
  .modelo__node:last-child { padding-bottom: 0; }

  .modelo__node::before {
    content: "";
    position: absolute;
    left: -1.75rem;
    top: 5px;
    bottom: 0;
    width: 1px;
    background: var(--color-gold-a30);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.8s var(--ease-elegant);
  }
  .modelo__node:last-child::before { display: none; }
  .modelo__nodes.is-visible .modelo__node::before { transform: scaleY(1); }

  .modelo__node::after {
    content: "";
    position: absolute;
    left: calc(-1.75rem - 3.5px);
    top: 1px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-black);
    border: 1.5px solid var(--color-gold);
    transform: scale(0);
    transition: transform var(--dur-base) var(--ease-elegant);
  }
  .modelo__nodes.is-visible .modelo__node::after { transform: scale(1); }
}