/* Africa Autism Alliance — homepage-only sections:
   understanding autism (sticky intro + progress), What we do (stacking cards), Find support. */

/* ==========================================================================
   Understanding autism
   ========================================================================== */

.understanding__grid {
  display: grid;
  gap: var(--space-6);
}

.understanding__intro { display: grid; }
.understanding__copy {
  display: grid;
  gap: var(--space-3);
  align-content: start;
}

.progress { display: none; }

.understanding__cards {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 900px) {
  .understanding__grid {
    grid-template-columns: 5fr 7fr;
    gap: var(--space-8);
    align-items: start;
  }
  .understanding__intro {
    position: sticky;
    top: 120px;
    grid-template-columns: 2px 1fr;
    gap: var(--space-4);
  }
  .progress {
    position: relative;
    display: block;
    overflow: hidden;
    border-radius: 2px;
    background: var(--line);
  }
  .progress__fill {
    position: absolute;
    inset: 0;
    background: var(--brand-primary);
    transform-origin: top;
  }
}

/* ==========================================================================
   5. What we do — stacking cards
   ========================================================================== */

.stack {
  display: grid;
  gap: var(--space-4);
}

.stack-card {
  display: grid;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.stack-card__media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.stack-card__body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-4) var(--space-6);
}

.stack-card__num {
  font-size: var(--fs-small);
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--primary-ink);
}

.stack-card__title {
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.015em;
}

.stack-card__body p {
  max-width: 42ch;
  color: var(--ink-soft);
}

.stack-card__link {
  margin-top: var(--space-1);
  padding-block: .625rem; /* 44px+ tap target; the underline stays on the text */
  font-weight: 600;
}

/* Card 04 — the core offer */
.stack-card--brand { background: var(--brand-primary); }
.stack-card--brand .stack-card__title,
.stack-card--brand .stack-card__body p,
.stack-card--brand .stack-card__link { color: var(--on-brand); }
.stack-card--brand .stack-card__num {
  padding: .25rem .75rem;
  border-radius: var(--radius-pill);
  background: var(--brand-accent);
  color: var(--on-brand);
}

@media (min-width: 900px) {
  .stack { gap: var(--space-6); }
  .stack-card {
    position: sticky;
    top: 96px;
    grid-template-columns: 1fr 1fr;
    min-height: min(80vh, 760px);
    transform-origin: 50% 0;
  }
  .stack-card__media { position: relative; }
  .stack-card__media img {
    position: absolute;
    inset: 0;
    height: 100%;
    aspect-ratio: auto;
  }
  .stack-card__body { padding: clamp(2rem, 5vw, 5rem); }
}

/* ==========================================================================
   Find support
   ========================================================================== */

.support { background: var(--secondary-tint); }

/* ==========================================================================
   Motion preferences — stacking cards don't stick
   ========================================================================== */

.calm .stack-card { position: relative; top: auto; }

@media (prefers-reduced-motion: reduce) {
  .stack-card { position: relative; top: auto; }
}