/* ============================================================
   VantaCard — Nuestro compromiso
   Page-specific styles only. Everything shared (nav, footer, btn,
   accent-italic, ambient-glow, reveal-up, brand-mark, and now the
   .chapter / .step / .pull-quote system) lives in styles.css — this
   file never redefines those.

   The page reads as one long-form piece, not as a deck: an opening,
   four chapters that all share the same shape, two pull quotes that
   break the rhythm between them, and a close. The only things
   defined here are the two components that exist nowhere else — the
   opening block and the impact entries.
   ============================================================ */

/* Reading-progress hairline. One long narrative with no in-page nav,
   so a thin fixed indicator gives scroll orientation the way an
   editorial long-read would, instead of leaving the reader guessing
   how much is left. Driven by ScrollTrigger's own progress value in
   compromiso.js — no separate scroll listener. */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform-origin: left;
  transform: scaleX(0);
  z-index: 101;
  pointer-events: none;
}

/* ---------- Apertura ----------
   A screen of its own. It used to be a padded block barely taller than
   its own text, which gave the light field behind the page almost no
   room to move while you were still reading the opening — the page
   started flat and only came alive further down. A full viewport of
   height gives the light somewhere to travel, and gives the headline
   the presence the first line of the page should have. */
.sustain-hero {
  max-width: 820px;
  margin: 0 auto;
  min-height: 92vh;
  min-height: 92svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--space-6) + 2rem) var(--space-4) var(--space-6);
  text-align: center;
}

.sustain-hero h1 {
  font-size: clamp(2.6rem, 6.2vw, 4.6rem);
  letter-spacing: -0.03em;
  line-height: 1.06;
  margin: 0 0 var(--space-4);
}

.sustain-hero__lede {
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.7;
  max-width: 58ch;
  margin: 0 auto;
}

/* Short screens: a 92vh opening plus this much type does not fit, and
   the quote below it should still hint at itself above the fold. */
@media (max-height: 720px) {
  .sustain-hero {
    min-height: 0;
    padding-block: calc(var(--space-6) + 1rem) var(--space-5);
  }
  .sustain-hero h1 {
    font-size: clamp(2rem, 6vw, 3rem);
  }
}

/* ---------- Impacto ----------
   The one chapter that does not use .step. Its entries carry a large
   display numeral and an ODS attribution, so they need their own
   proportions — and the difference keeps the page from reading as the
   same row repeated eight times. */
.impacts {
  display: flex;
  flex-direction: column;
}

.impact {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  padding: var(--space-4) 0;
  border-top: 1px solid var(--border);
}

.impact:last-child {
  border-bottom: 1px solid var(--border);
}

.impact__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.4rem;
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--border-strong);
  transition: color 0.3s ease;
}

.impact h3 {
  font-size: 1.2rem;
}

.impact p {
  margin-top: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* The UN goal each idea maps to. Set as a quoted attribution rather
   than a chip: it is the source the claim leans on, not a label. */
.impact__ods {
  margin-top: var(--space-3);
  padding-left: var(--space-2);
  border-left: 2px solid var(--border-strong);
  color: var(--accent-dim);
  font-size: 0.85rem;
}

@media (hover: hover) and (pointer: fine) {
  .impact:hover .impact__num {
    color: var(--accent-dim);
  }
}

@media (max-width: 480px) {
  .impact {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: var(--space-2);
  }
  .impact__num {
    font-size: 1.8rem;
  }
}

/* ---------- Cierre ----------
   Its own screen, one centred axis, and — the part it was missing —
   something to look at. The previous version spaced everything out
   generously and ended up scattered: a headline, a line, a long void,
   a small mark, another void, a button. Now the mark lives on the card
   it belongs to, the caption sits under the card as a caption, and the
   gaps are even instead of enormous. */
.sustain-close {
  max-width: 720px;
  margin: 0 auto;
  min-height: 88vh;
  min-height: 88svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--space-6) var(--space-4);
  text-align: center;
}

.sustain-close h2 {
  font-size: clamp(2.1rem, 4.2vw, 3rem);
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin: 0 0 var(--space-3);
}

.sustain-close > p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 50ch;
  margin: 0 0 var(--space-5);
}

.sustain-close__figure {
  margin: 0 0 var(--space-5);
}

/* Shares its face with the hero card and the card in the 3D scene —
   the rule lives in styles.css so the three cannot drift apart. Only
   the size is this page's. */
.sustain-close__card {
  width: min(272px, 70vw);
  aspect-ratio: 1.586;
  margin: 0 auto var(--space-3);
}

/* The one detail that says what the object is, bottom-right on the
   face, the way a chip sits on a real card. */
.sustain-close__chip {
  align-self: flex-end;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--accent-dim);
}

.sustain-close__figure figcaption {
  color: var(--text-tertiary);
  font-size: 0.9rem;
}

/* Short screens: the card is the first thing to give up its height,
   and the button is the only thing here with a job. */
@media (max-height: 760px) {
  .sustain-close {
    min-height: 0;
    padding-block: var(--space-6);
  }
  .sustain-close > p {
    margin-bottom: var(--space-4);
  }
  .sustain-close__card {
    width: min(228px, 62vw);
  }
  .sustain-close__figure {
    margin-bottom: var(--space-4);
  }
}

/* ---- Escala de teléfono ----
   Mismo criterio que en styles.css: los pisos de los clamp() están
   puestos para escritorio y en 390px son los que mandan. */
@media (max-width: 720px) {
  .sustain-hero h1 {
    font-size: 2rem;
    line-height: 1.1;
  }

  .sustain-hero__lede {
    font-size: 1rem;
  }

  .sustain-close h2 {
    font-size: 1.6rem;
  }

  .sustain-close > p {
    font-size: 1rem;
  }
}