/* ==========================================================================
   RUT — TINTA Y SOL · landing-aprender.css
   Landing de campaña CAP. 02 — PARA APRENDER (§4.5 de ART-DIRECTION.md).
   Requiere tokens.css + base.css. Solo estilos propios de esta página.
   Gemela de landing-vivir.css / landing-crecer.css.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Header sobre héroe de tinta: variante inversa mientras no hay scroll
   (al hacer scroll, .is-scrolled devuelve el fondo blanco de base.css).
   -------------------------------------------------------------------------- */
.site-header:not(.is-scrolled):not(.is-open) .brand { color: var(--white); }
.site-header:not(.is-scrolled):not(.is-open) .brand__sub { color: var(--white-60); }
.site-header:not(.is-scrolled):not(.is-open) .site-nav > ul > li > a { color: var(--white); }
.site-header:not(.is-scrolled):not(.is-open) .burger span { background: var(--white); }

/* --------------------------------------------------------------------------
   HERO de campaña — folio de capítulo + H1 con subrayado firma + solape.
   Variante --ink: el capítulo del estudio abre sobre bloque de tinta.
   -------------------------------------------------------------------------- */
.lhero {
  padding-top: calc(var(--header-h) + clamp(36px, 7vh, 88px));
  padding-bottom: var(--space-block);
}
.lhero__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px var(--gutter);
  padding-bottom: 14px;
  border-bottom: var(--rule-ink);
  margin-bottom: clamp(28px, 5vh, 56px);
}
.lhero--ink .lhero__meta { border-bottom: var(--rule-inverse); }
.lhero__title {
  position: relative;
  z-index: 2;
  max-width: 13ch;
  font-size: var(--step-6);
}
.lhero__lower {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gutter);
  align-items: start;
}
.lhero__aside {
  grid-column: 1 / 5;
  padding-top: clamp(24px, 4vh, 48px);
  display: flex;
  flex-direction: column;
  gap: var(--space-cluster);
}
.lhero--ink .lhero__aside .lead { color: var(--white-60); }
.lhero__ctas { display: flex; flex-wrap: wrap; gap: 12px; }
.lhero__data {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--gray-text);
  padding-top: 14px;
  border-top: var(--rule-ink);
  max-width: none;
}
.lhero--ink .lhero__data {
  color: var(--white-60);
  border-top: var(--rule-inverse);
}
.lhero__media {
  grid-column: 5 / 13;
  margin-top: clamp(-64px, -5vh, -24px);      /* la foto monta bajo el titular */
  margin-right: max(calc(50% - 50vw), -80vw); /* a sangre hasta el borde derecho */
}
.lhero--ink .lhero__media figcaption { color: var(--white-60); }
@media (max-width: 860px) {
  .lhero__title { max-width: none; }
  .lhero__lower { display: block; }
  .lhero__media { margin-top: 20px; margin-right: calc(var(--margin-page) * -1); }
  .lhero__aside { padding-top: 16px; }
}
@media (max-width: 520px) {
  .lhero__title { font-size: var(--step-5); }
}

/* --------------------------------------------------------------------------
   La promesa — lead serif desplazado (asimetría editorial)
   -------------------------------------------------------------------------- */
.promise__grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gutter);
}
.promise__lead {
  grid-column: 4 / 12;
  font-family: var(--font-display);
  font-optical-sizing: auto;
  font-size: var(--step-3);
  font-weight: 450;
  line-height: 1.35;
  letter-spacing: var(--tracking-display);
  text-wrap: pretty;
  max-width: 30ch;
}
@media (max-width: 860px) {
  .promise__lead { grid-column: 1 / -1; }
}

/* --------------------------------------------------------------------------
   Los 5 módulos — bloques editoriales alternos con folio en mono
   -------------------------------------------------------------------------- */
.mods { display: flex; flex-direction: column; }
.mod {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gutter);
  align-items: center;
  padding-block: var(--space-block);
  border-top: var(--rule-ink);
}
.mod__media  { grid-column: 1 / 7; }
.mod__body   { grid-column: 8 / 13; }
.mod--flip .mod__media { grid-column: 7 / 13; order: 2; }
.mod--flip .mod__body  { grid-column: 1 / 6; order: 1; }
.mod--featured { border-top: 3px solid var(--sol); }
.mod__folio {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: var(--tracking-mono);
  color: var(--indigo);
  margin-bottom: 10px;
}
.mod__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--ink);
  background: var(--sol);
  padding: 4px 10px;
  margin-bottom: 12px;
}
.mod__body h3 { font-size: var(--step-2); }
.mod__note {
  margin-top: 8px;
  color: var(--gray-text);
  font-style: italic;
}
.mod__list { margin-top: 16px; }
.mod__list li {
  display: flex;
  gap: 12px;
  padding: 9px 0;
  border-top: var(--rule);
}
.mod__list li::before {
  content: "—";
  font-family: var(--font-mono);
  color: var(--indigo);
  flex: none;
}
@media (max-width: 860px) {
  .mod, .mod--flip { display: block; }
  .mod--flip .mod__media, .mod--flip .mod__body { order: initial; }
  .mod__body { margin-top: 18px; }
}

/* --------------------------------------------------------------------------
   Diferencial — bloque de tinta comparativo: por tu cuenta vs. en la RUT
   -------------------------------------------------------------------------- */
.bg-ink .diff__intro {
  margin-top: var(--space-cluster);
  max-width: 55ch;
  color: var(--white-60);
  font-size: var(--step-1);
}
.compare {
  margin-top: var(--space-block);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-block) var(--gutter);
  align-items: start;
}
.compare__col h3 {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.compare__col ul li {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-top: var(--rule-inverse);
  max-width: none;
}
.compare__col ul li::before {
  font-family: var(--font-mono);
  flex: none;
}
.compare__col--solo {
  border-top: 2px solid var(--white-20);
  padding-top: 18px;
  color: var(--white-60);
}
.compare__col--solo h3 { color: var(--white-60); }
.compare__col--solo ul li::before { content: "—"; color: var(--white-60); }
.compare__col--rut {
  border-top: 3px solid var(--sol);
  padding: 18px clamp(18px, 2.5vw, 28px) clamp(18px, 2.5vw, 28px);
  background: rgba(255, 255, 255, 0.06);
}
.compare__col--rut h3 { color: var(--sol); }
.compare__col--rut ul li { color: var(--white); }
.compare__col--rut ul li::before { content: "+"; color: var(--sol); }
@media (max-width: 700px) {
  .compare { grid-template-columns: 1fr; }
}

/* Flujo del día en mono: Clase → Comida → Descanso → Estudio → Tutoría */
.bg-ink .flow {
  margin-top: var(--space-block);
  padding-top: 18px;
  border-top: var(--rule-inverse);
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--sol);
  max-width: none;
}
.bg-ink .flow span { color: var(--white); }

/* --------------------------------------------------------------------------
   Testimonios — citas Fraunces itálicas con pie mono
   -------------------------------------------------------------------------- */
.quotes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-block) var(--gutter);
}
.quote {
  margin: 0;
  border-top: var(--rule-ink);
  padding-top: var(--space-cluster);
}
.quote p:first-child {
  font-family: var(--font-display);
  font-optical-sizing: auto;
  font-style: italic;
  font-weight: 450;
  font-size: var(--step-2);
  line-height: 1.3;
  letter-spacing: var(--tracking-display);
  text-wrap: pretty;
}
.quote footer {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--gray-text);
}
@media (max-width: 860px) { .quotes { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------------------
   CTA final — duotono tinta (como el cierre de la home)
   -------------------------------------------------------------------------- */
.cta-final {
  position: relative;
  background: var(--ink);
  color: var(--white);
  overflow: hidden;
}
.cta-final__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35; /* duotono pregenerado, atenuado sobre tinta: texto AA */
}
.cta-final__inner {
  position: relative;
  padding-block: clamp(72px, 12vh, 140px);
}
.cta-final__inner h2 { max-width: 16ch; }
.cta-final__sub { margin-top: 14px; color: var(--white-60); max-width: 48ch; }
.cta-final__ctas { display: flex; flex-wrap: wrap; gap: 14px; margin-top: var(--space-block); }

/* --------------------------------------------------------------------------
   Formulario final — labels visibles, campos mist, área táctil ≥44px
   -------------------------------------------------------------------------- */
.form__grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gutter);
  row-gap: var(--space-block);
  align-items: start;
}
.form__info { grid-column: 1 / 6; }
.form__card { grid-column: 7 / 13; }
.info-list { margin-top: var(--space-block); }
.info-list li {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  padding: 12px 0;
  border-top: var(--rule);
  font-size: var(--step-0);
  max-width: none;
}
.info-list__k {
  flex: none;
  width: 92px;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--indigo);
}
.form__card {
  background: var(--paper);
  border: var(--rule);
  border-top: 4px solid var(--sol);
  border-radius: var(--radius-s);
  padding: clamp(24px, 3.5vw, 40px);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 var(--gutter);
}
.field select {
  width: 100%;
  min-height: var(--tap-min);
  padding: 10px 14px;
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  color: var(--ink);
}
.field select:focus {
  outline: var(--focus-ring);
  outline-offset: 0;
  border-color: var(--indigo);
}
@media (max-width: 860px) {
  .form__grid { display: block; }
  .form__card { margin-top: var(--space-block); }
  .form-row { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------------
   Sigue leyendo — cruce de capítulos
   -------------------------------------------------------------------------- */
.next-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-block) var(--gutter);
}
.next-grid .card-ed { border-top: var(--rule-ink); padding-top: var(--space-cluster); }
@media (max-width: 860px) { .next-grid { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------------------
   Social del footer (mismo bloque que home.css)
   -------------------------------------------------------------------------- */
.social-row { display: flex; gap: 10px; }
.social-row a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--tap-min);
  height: var(--tap-min);
  border: 1px solid var(--white-20);
  border-radius: var(--radius-s);
  transition: border-color var(--dur-fast) ease, transform var(--dur-fast) var(--ease-editorial);
}
.social-row a:hover { border-color: var(--sol); transform: translateY(-2px); }
.social-row svg { width: 18px; height: 18px; fill: var(--white); }
.social-row a:hover svg { fill: var(--sol); }