/* ============================================================================
   ROADMAP — "El mes que cambia cómo entiendes la IA" (tono claro · cálido)
   Timeline vertical de una sola columna. Mobile-first: rail a la izquierda,
   sin zigzag. Tira solo de tokens.css + clases del sistema (app.css).
   ============================================================================ */

.sec-roadmap .s-head { margin-bottom: clamp(40px, 7vw, 72px); }

/* ---- Timeline: rail vertical único a la izquierda ---- */
.sec-roadmap .rm-timeline {
  position: relative;
  max-width: 760px;
  margin-inline: auto;
}

/* línea continua que recorre los nodos; arranca y termina en el centro
   del primer/último dot para no sobresalir */
.sec-roadmap .rm-timeline::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 13px;
  bottom: 13px;
  width: 1px;
  background: linear-gradient(
    180deg,
    var(--line-strong) 0%,
    var(--line) 50%,
    transparent 100%
  );
}

/* ---- Fila ---- */
.sec-roadmap .rm-row {
  position: relative;
  display: grid;
  grid-template-columns: 28px 1fr;
  column-gap: var(--s-5);
  align-items: start;
}
.sec-roadmap .rm-row + .rm-row { margin-top: var(--s-5); }

/* nodo: único detalle rojo de la fila */
.sec-roadmap .rm-dot {
  grid-column: 1;
  justify-self: center;
  margin-top: 4px;
  width: 27px;
  height: 27px;
  border-radius: 50%;
  background: var(--bg-warm);
  border: 1px solid var(--red-line);
  display: grid;
  place-items: center;
  position: relative;
  z-index: 1;
}
.sec-roadmap .rm-dot::after {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--red);
  transform: scale(0.55);
  opacity: 0.55;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

/* ---- Tarjeta de semana ---- */
.sec-roadmap .rm-card {
  grid-column: 2;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: clamp(22px, 5vw, 30px) clamp(22px, 5vw, 32px);
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: var(--s-5);
  row-gap: 4px;
  align-items: baseline;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

/* número grande, sobrio (charcoal tenue): jerarquía por escala, no por color */
.sec-roadmap .rm-num {
  grid-column: 1;
  grid-row: 1 / span 2;
  font-family: var(--font-display);
  font-size: clamp(40px, 11vw, 56px);
  line-height: 0.85;
  letter-spacing: var(--tracking-tight);
  color: var(--text-strong);
  opacity: 0.16;
  font-variant-numeric: tabular-nums;
  align-self: center;
}

.sec-roadmap .rm-tag {
  grid-column: 2;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: 11px;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 2px;
}

.sec-roadmap .rm-card h3 {
  grid-column: 2;
  font-size: var(--fs-h3);
  line-height: var(--lh-snug);
  text-wrap: balance;
}

/* hover: lift sutil + el nodo se enciende del todo */
@media (hover: hover) {
  .sec-roadmap .rm-row:hover .rm-card {
    border-color: var(--line-strong);
    box-shadow: var(--shadow);
    transform: translateY(-2px);
  }
  .sec-roadmap .rm-row:hover .rm-dot { border-color: var(--red); }
  .sec-roadmap .rm-row:hover .rm-dot::after { transform: scale(1); opacity: 1; }
}

/* ---- Tablet ---- */
@media (min-width: 768px) {
  .sec-roadmap .rm-row { grid-template-columns: 32px 1fr; column-gap: var(--s-7); }
  .sec-roadmap .rm-row + .rm-row { margin-top: var(--s-6); }
  .sec-roadmap .rm-timeline::before { left: 15px; }
  .sec-roadmap .rm-dot { margin-top: 6px; }

  /* conector hairline tarjeta ← rail */
  .sec-roadmap .rm-card::before {
    content: "";
    position: absolute;
    top: 50%;
    left: calc(-1 * var(--s-7));
    width: var(--s-7);
    height: 1px;
    background: var(--line);
    transform: translateY(-50%);
  }
  .sec-roadmap .rm-card { position: relative; }
}

/* ---- Desktop ---- */
@media (min-width: 1024px) {
  .sec-roadmap .rm-card {
    column-gap: var(--s-6);
    align-items: center;
  }
  .sec-roadmap .rm-num { font-size: 60px; }
}