/* ============================================================
   AMA Pediatrics — Base / Reset y utilidades globales
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

* { margin: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--tx-body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg, picture, video {
  display: block;
  max-width: 100%;
  height: auto;
}

a { color: inherit; text-decoration: none; }

button, input, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--tx);
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.01em;
}

p { color: var(--tx-body); }

:focus-visible {
  outline: 3px solid var(--c-lila);
  outline-offset: 3px;
  border-radius: 4px;
}

/* --- Layout helpers --- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(3.5rem, 8vw, 7rem);
}

.section--alt { background: var(--bg-alt); }

.section--tint-lila  { background: var(--lila-soft); }
.section--tint-verde { background: var(--verde-soft); }

/* --- Encabezados de sección --- */
.section-head {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-head);
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-lila);
  margin-bottom: 0.9rem;
}
.eyebrow::before, .eyebrow::after {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.7;
}

.section-title { font-size: var(--fs-h2); }

.section-sub {
  margin-top: 0.9rem;
  font-size: 1.075rem;
  color: var(--tx-muted);
}

/* --- Accesibilidad --- */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: 12px; top: -60px;
  background: var(--c-lila); color: #fff;
  padding: 0.6rem 1rem; border-radius: 8px;
  z-index: 2000; transition: top var(--t);
}
.skip-link:focus { top: 12px; }

/* --- Animación de aparición al hacer scroll --- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; }
}