/* ==========================================================================
   CEK · Base — reset, tipografía y primitivas de layout
   ========================================================================== */

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

* { margin: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 72px; /* compensa navbar sticky al saltar con anclas */
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  font-family: var(--font-brand);
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  line-height: var(--lh-normal);
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color var(--t-base), color var(--t-base);
  overflow-x: hidden;
}

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

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

button { cursor: pointer; }

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

ul { list-style: none; padding: 0; }

:focus-visible {
  outline: 3px solid var(--brand-amber);
  outline-offset: 2px;
  border-radius: 4px;
}

/* --- Tipografía --- */
h1, h2, h3, h4 {
  line-height: var(--lh-snug);
  font-weight: var(--fw-extrabold);
  letter-spacing: -0.01em;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); font-weight: var(--fw-bold); }

p { line-height: var(--lh-normal); }

strong { font-weight: var(--fw-bold); }

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

.section {
  padding-block: var(--section-gap);
  position: relative;
  background-color: var(--bg);
  transition: background-color var(--t-base);
}

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

.section__head {
  max-width: 760px;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.section__head--center {
  margin-inline: auto;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  font-size: var(--fs-label);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber-text);
  margin-bottom: 0.75rem;
}

.lead {
  color: var(--text-muted);
  font-size: clamp(1rem, 0.5vw + 0.9rem, 1.125rem);
  margin-top: 0.75rem;
  max-width: 60ch;
}

.amber { color: var(--amber-text); }

/* Grids reutilizables */
.grid { display: grid; gap: var(--gap-cards); }

@media (min-width: 768px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
}

/* Accesibilidad: salto al contenido */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: var(--z-overlay);
  background: var(--brand-amber);
  color: var(--on-amber);
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  font-weight: var(--fw-bold);
}
.skip-link:focus { left: 0; }

.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;
}

/* Animación de entrada al hacer scroll (progresiva).
   Solo se oculta si hay JS (.js): sin JS, todo el contenido queda visible. */
.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}