/* ═══ 07 · Formación ════════════════════════════════════════════════════════ */

#formacion {
  --for-hud: 0px;
  --for-col: 56px;
  --for-cuerda-x: calc(var(--margen) + var(--for-col) / 2);
  --for-fauna: #041826;
  --for-detalle: #5FE0D9;
  position: relative;
  padding-block: clamp(6rem, 16vh, 11rem) clamp(5rem, 12vh, 9rem);
}
@media (min-width: 1024px) {
  #formacion { --for-hud: 110px; }
}

#formacion .contenedor { padding-right: calc(var(--margen) + var(--for-hud)); }

/* ─── Cabeza ───────────────────────────────────────────────────────────── */
#formacion .for-titulo { margin-top: .45em; max-width: 12ch; }
#formacion .for-cabeza__pie {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.6rem 3rem;
  margin-top: clamp(1.6rem, 4vh, 2.6rem);
}
#formacion .for-cabeza__dato {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  font-size: var(--t-micro);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--tinta-3);
  border-left: 1px solid var(--linea);
  padding-left: 1rem;
}
#formacion .for-cabeza__dato span:first-child { color: var(--naranja-luz, var(--naranja)); font-size: var(--t-peque); }

/* ─── Ruta y cuerda ────────────────────────────────────────────────────── */
#formacion .for-ruta {
  position: relative;
  margin-top: clamp(3.5rem, 10vh, 7rem);
  padding-top: 76px;
  padding-bottom: 70px;
}
#formacion .for-cuerda {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--for-cuerda-x);
  width: 64px;
  margin-left: -32px;
  pointer-events: none;
  z-index: 1;
}
#formacion .for-boya {
  position: absolute;
  top: 0;
  left: 50%;
  width: 56px;
  margin-left: -28px;
  overflow: visible;
  animation: for-boya 6s ease-in-out infinite;
}
#formacion .for-boya__cuerpo { fill: var(--naranja); }
#formacion .for-boya__franja { fill: var(--espuma); opacity: .92; }
#formacion .for-boya__amarre { stroke: var(--espuma-2); stroke-width: 2; }
@keyframes for-boya {
  0%, 100% { translate: 0 0; rotate: -4deg; }
  50% { translate: 0 -5px; rotate: 4deg; }
}

#formacion .for-cuerda__linea,
#formacion .for-cuerda__viva {
  position: absolute;
  left: 50%;
  top: 62px;
  bottom: 40px;
  width: 4px;
  margin-left: -2px;
  border-radius: 2px;
}
#formacion .for-cuerda__linea {
  background:
    repeating-linear-gradient(-58deg, rgba(234, 251, 251, .62) 0 3px, rgba(234, 251, 251, .2) 3px 6px);
  opacity: .75;
}
#formacion .for-cuerda__viva {
  background:
    repeating-linear-gradient(-58deg, var(--naranja-luz, #FF9F4A) 0 3px, var(--naranja) 3px 6px);
  box-shadow: 0 0 14px rgba(250, 129, 23, .55);
  transform-origin: 50% 0;
  transform: scaleY(0);
  will-change: transform;
}
#formacion .for-cuerda__tu {
  position: absolute;
  top: 62px;
  left: 50%;
  width: 26px;
  height: 26px;
  margin: -13px 0 0 -13px;
  border-radius: 50%;
  border: 2px solid var(--naranja);
  background: rgba(6, 30, 43, .6);
  box-shadow: 0 0 0 6px rgba(250, 129, 23, .14), 0 0 24px rgba(250, 129, 23, .6);
  will-change: transform;
}
#formacion .for-cuerda__tu > i {
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: var(--naranja);
  animation: for-latido 2.4s ease-in-out infinite;
}
@keyframes for-latido { 50% { transform: scale(.55); opacity: .7; } }
#formacion .for-cuerda__burbujas {
  position: absolute;
  left: 50%;
  top: 0;
  width: 1px;
  height: 1px;
}
#formacion .for-cuerda__burbujas i {
  position: absolute;
  left: 0;
  top: 0;
  width: 7px;
  height: 7px;
  margin: -3px;
  border-radius: 50%;
  border: 1px solid rgba(234, 251, 251, .7);
  opacity: 0;
  animation: for-burbuja 3.4s ease-in infinite;
}
#formacion .for-cuerda__burbujas i:nth-child(2) { animation-delay: .7s; width: 5px; height: 5px; --bx: -8px; }
#formacion .for-cuerda__burbujas i:nth-child(3) { animation-delay: 1.5s; width: 9px; height: 9px; --bx: 10px; }
#formacion .for-cuerda__burbujas i:nth-child(4) { animation-delay: 2.1s; width: 4px; height: 4px; --bx: -4px; }
#formacion .for-cuerda__burbujas i:nth-child(5) { animation-delay: 2.8s; width: 6px; height: 6px; --bx: 6px; }
@keyframes for-burbuja {
  0% { transform: translate(0, -10px) scale(.6); opacity: 0; }
  15% { opacity: .9; }
  100% { transform: translate(var(--bx, 4px), -150px) scale(1); opacity: 0; }
}
#formacion .for-lastre {
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 24px;
  height: 40px;
  margin-left: -12px;
  border-radius: 7px 7px 10px 10px;
  background: linear-gradient(90deg, #0b2735, #2b4d5c 45%, #0b2735);
  box-shadow: inset 0 1px 0 rgba(234, 251, 251, .25), 0 10px 24px rgba(2, 10, 17, .5);
}
#formacion .for-lastre::before {
  content: "";
  position: absolute;
  top: -9px; left: 50%;
  width: 10px; height: 10px;
  margin-left: -5px;
  border: 2px solid var(--espuma-3);
  border-radius: 50%;
}

/* ─── Tramos ───────────────────────────────────────────────────────────── */
#formacion .for-tramos { list-style: none; margin: 0; padding: 0; position: relative; z-index: 2; }
#formacion .for-tramo {
  display: grid;
  grid-template-columns: var(--for-col) minmax(0, 1fr);
  grid-template-areas: "marca texto" ". medio";
  column-gap: 1rem;
  row-gap: 1.6rem;
  padding-block: clamp(2.6rem, 8vh, 6rem);
}
#formacion .for-marca {
  grid-area: marca;
  justify-self: center;
  align-self: start;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 52px;
  margin-top: -.2rem;
  border-radius: 10px 10px 14px 14px;
  background: rgba(6, 30, 43, .82);
  border: 1px solid rgba(234, 251, 251, .28);
  color: var(--espuma-2);
  font-family: var(--f-mono);
  line-height: 1;
  transition: background .6s var(--agua-ease), color .6s var(--agua-ease), box-shadow .6s var(--agua-ease), transform .6s var(--agua-ease), border-color .6s;
}
#formacion .for-marca::before {         /* el ojal por donde pasa la cuerda */
  content: "";
  position: absolute;
  top: 6px; left: 50%;
  width: 8px; height: 8px;
  margin-left: -4px;
  border-radius: 50%;
  background: rgba(2, 10, 17, .7);
  box-shadow: inset 0 0 0 1px rgba(234, 251, 251, .3);
}
#formacion .for-marca b { font-size: 1rem; font-weight: 700; margin-top: 10px; letter-spacing: .02em; }
#formacion .for-marca small { font-size: .55rem; letter-spacing: .14em; text-transform: uppercase; margin-top: 4px; opacity: .8; }
#formacion .for-tramo.es-activo .for-marca {
  background: var(--naranja);
  border-color: var(--naranja-luz, #FF9F4A);
  color: var(--abismo);
  transform: scale(1.12);
  box-shadow: 0 0 0 7px rgba(250, 129, 23, .16), 0 0 34px rgba(250, 129, 23, .55);
}

#formacion .for-tramo__texto { grid-area: texto; min-width: 0; transition: opacity .8s var(--agua-ease); }
#formacion .for-tramo__grupo {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .4rem .9rem;
  font-size: var(--t-micro);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--tinta-3);
  margin-bottom: .9rem;
}
#formacion .for-tramo__tag {
  padding: .35em .9em;
  border-radius: var(--r-pildora);
  border: 1px solid var(--linea);
  color: var(--tinta);
  transition: border-color .6s, color .6s, background .6s;
}
#formacion .for-tramo.es-activo .for-tramo__tag {
  border-color: var(--naranja);
  color: var(--naranja-luz, #FF9F4A);
  background: rgba(250, 129, 23, .08);
}
#formacion .for-tramo .titulo--3 { font-size: clamp(1.7rem, 3vw, 2.9rem); }
#formacion .for-tramo .texto { margin-top: .9rem; }
#formacion .for-ficha {
  display: grid;
  gap: .6rem;
  margin: 1.3rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px dashed var(--linea);
  font-size: var(--t-micro);
  max-width: 30rem;
}
#formacion .for-ficha div { display: grid; grid-template-columns: 8.2rem minmax(0, 1fr); gap: 1rem; }
#formacion .for-ficha dt { color: var(--tinta-3); letter-spacing: .14em; text-transform: uppercase; }
#formacion .for-ficha dd { margin: 0; color: var(--tinta-2); letter-spacing: .02em; }
#formacion .for-tramo__cta { margin-top: 1.5rem; }

#formacion .for-hito {
  display: flex;
  align-items: center;
  gap: .9rem;
  margin-top: 1.4rem;
}
#formacion .for-caballito {
  width: 34px;
  height: auto;
  flex: none;
  color: var(--for-fauna);
  --detalle: var(--for-detalle);
  --brillo: #6BFFE6;
  filter: drop-shadow(0 0 10px rgba(95, 224, 217, .25));
  animation: for-flotar 5.5s ease-in-out infinite;
}
@keyframes for-flotar { 50% { translate: 0 -7px; rotate: 4deg; } }
#formacion .for-hito p { display: flex; align-items: baseline; flex-wrap: wrap; gap: .3rem .9rem; }
#formacion .for-hito__num {
  font-family: var(--f-display);
  font-weight: 850;
  font-size: clamp(2.6rem, 4vw, 3.6rem);
  line-height: .9;
  letter-spacing: -.03em;
  color: var(--tinta);
}
#formacion .for-hito__num small { font-size: .42em; font-weight: 300; margin-left: .1em; letter-spacing: 0; }
#formacion .for-hito__que { font-size: var(--t-micro); letter-spacing: .1em; color: var(--tinta-2); text-transform: uppercase; max-width: 15rem; line-height: 1.5; }

#formacion .for-tramo__medio {
  grid-area: medio;
  margin: 0;
  width: min(100%, 420px);
  aspect-ratio: 4 / 5;
  box-shadow: 0 30px 60px -30px rgba(2, 10, 17, .75);
}
#formacion .for-tramo__medio--cuadro { aspect-ratio: 1; }
#formacion .for-tramo[data-tramo="1"] .for-tramo__medio > img { object-position: 50% 70%; }
#formacion .for-credito {
  position: absolute;
  right: .8rem;
  bottom: .7rem;
  z-index: 4;
  font-size: .68rem;
  letter-spacing: .06em;
  color: var(--espuma-2);
  text-shadow: 0 1px 6px rgba(2, 10, 17, .8);
}

/* escritorio: foto | cuerda | texto */
@media (min-width: 900px) {
  #formacion {
    --for-col: 120px;
    --for-cuerda-x: calc(var(--margen) + (100% - 2 * var(--margen) - var(--for-hud) - var(--for-col)) * 5 / 11 + var(--for-col) / 2);
  }
  #formacion .for-tramo {
    grid-template-columns: minmax(0, 5fr) var(--for-col) minmax(0, 6fr);
    grid-template-areas: "medio marca texto";
    column-gap: 0;
    align-items: start;
    padding-block: clamp(3rem, 9vh, 6.5rem);
  }
  #formacion .for-marca { width: 54px; height: 58px; margin-top: .2rem; }
  #formacion .for-tramo__texto { padding-left: clamp(.5rem, 2vw, 2rem); max-width: 34rem; }
  #formacion .for-tramo__medio { justify-self: end; margin-right: clamp(1rem, 3vw, 3rem); }
  #formacion .for-tramo[data-tramo="1"] .for-tramo__medio { width: min(86%, 400px); }
  #formacion .for-tramo[data-tramo="2"] .for-tramo__medio { width: min(70%, 330px); aspect-ratio: 3 / 4; margin-top: 4rem; }
  #formacion .for-tramo[data-tramo="3"] .for-tramo__medio { width: min(78%, 380px); }
  #formacion .for-tramo[data-tramo="4"] .for-tramo__medio { width: min(58%, 290px); margin-top: 3rem; }
  #formacion .for-tramo[data-tramo="5"] .for-tramo__medio { width: min(80%, 380px); }
  #formacion .for-tramo:not(.es-activo) .for-tramo__texto { opacity: .55; }
  .es-reducido #formacion .for-tramo .for-tramo__texto { opacity: 1; }
}

/* ─── La prueba ────────────────────────────────────────────────────────── */
#formacion .for-prueba {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 3rem;
  margin-top: clamp(4rem, 12vh, 8rem);
  align-items: center;
}
#formacion .for-prueba .titulo { margin-top: .5em; }
#formacion .for-prueba .texto { margin-top: 1.1rem; }
#formacion .for-prueba__datos {
  display: grid;
  gap: .55rem;
  margin: 1.6rem 0 0;
  font-size: var(--t-micro);
}
#formacion .for-prueba__datos div { display: grid; grid-template-columns: 6.5rem minmax(0, 1fr); gap: 1rem; }
#formacion .for-prueba__datos dt { color: var(--tinta-3); letter-spacing: .14em; text-transform: uppercase; }
#formacion .for-prueba__datos dd { margin: 0; color: var(--tinta-2); }

#formacion .for-prueba__objetos {
  position: relative;
  padding: 1rem 0 1rem;
  min-width: 0;
}
#formacion .for-certificado {
  position: relative;
  margin: 0;
  width: min(100%, 560px);
  rotate: -3deg;
  z-index: 2;
}
#formacion .for-certificado__papel {
  aspect-ratio: 100 / 35;
  overflow: hidden;
  border-radius: 6px;
  background: #f4f1ea;
  box-shadow: 0 2px 0 rgba(255, 255, 255, .4) inset, 0 40px 70px -30px rgba(2, 10, 17, .85), 0 8px 18px rgba(2, 10, 17, .35);
  -webkit-mask-image: linear-gradient(180deg, #000 88%, transparent);
  mask-image: linear-gradient(180deg, #000 88%, transparent);
}
#formacion .for-certificado__papel img {
  display: block;
  width: 100%;
  height: auto;
  margin-top: -12%;
}
#formacion .for-sello {
  position: absolute;
  right: -10px;
  bottom: -46px;
  width: 112px;
  height: 112px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(250, 129, 23, .95) 0 34%, rgba(250, 129, 23, .14) 35% 100%);
  border: 1px solid rgba(250, 129, 23, .5);
  rotate: 8deg;
}
#formacion .for-sello svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  animation: for-girar 30s linear infinite;
}
#formacion .for-sello text {
  font-family: var(--f-mono);
  font-size: 9.6px;
  letter-spacing: 2.3px;
  fill: var(--espuma);
}
#formacion .for-sello b {
  position: relative;
  font-family: var(--f-display);
  font-weight: 800;
  font-size: .82rem;
  color: var(--abismo);
  letter-spacing: .02em;
}
@keyframes for-girar { to { rotate: 360deg; } }
#formacion .for-foto {
  position: relative;
  margin: -.6rem 0 0 8%;
  width: min(48%, 240px);
  aspect-ratio: 1;
  rotate: 4deg;
  z-index: 1;
  margin: 0;
  box-shadow: 0 30px 60px -24px rgba(2, 10, 17, .85);
}

@media (min-width: 900px) {
  #formacion .for-prueba { grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(2rem, 6vw, 6rem); }
  #formacion .for-prueba__objetos { padding: 2rem 0 2rem; }
  #formacion .for-foto { margin-left: 18%; width: min(40%, 260px); }
}

/* ─── Cierre ───────────────────────────────────────────────────────────── */
#formacion .for-cierre {
  position: relative;
  margin-top: clamp(6rem, 16vh, 11rem);
}
#formacion .for-cierre .lead { margin-top: 1rem; }
#formacion .for-cierre__acciones { margin-top: 2rem; }
#formacion .for-kelp {
  position: absolute;
  right: calc(var(--margen) + var(--for-hud) + 2rem);
  bottom: -4rem;
  width: clamp(40px, 5vw, 64px);
  height: auto;
  color: var(--for-fauna);
  --detalle: var(--for-detalle);
  --brillo: #6BFFE6;
  transform-origin: 50% 100%;
  animation: for-mecer 8s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: -1;
}
@keyframes for-mecer {
  from { transform: rotate(-3deg) skewX(2deg); }
  to   { transform: rotate(3deg) skewX(-2deg); }
}

@media (max-width: 479px) {
  #formacion .for-ficha div { grid-template-columns: minmax(0, 1fr); gap: .15rem; }
  #formacion .for-tramo__cta { width: 100%; justify-content: center; }
  #formacion .for-cierre .btn--grande { width: 100%; justify-content: center; }
  #formacion .for-sello { width: 88px; height: 88px; right: -2px; bottom: -78px; }
}

@media (prefers-reduced-motion: reduce) {
  #formacion .for-boya,
  #formacion .for-cuerda__tu > i,
  #formacion .for-cuerda__burbujas i,
  #formacion .for-caballito,
  #formacion .for-sello svg,
  #formacion .for-kelp { animation: none; }
  #formacion .for-cuerda__burbujas { display: none; }
}