/* Base — reset, typography, layout primitives, shared components */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  overflow-x: clip;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body { overflow-x: clip; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 800;
  color: var(--color-ink);
  overflow-wrap: anywhere;
  min-width: 0;
}

p { max-width: 65ch; }

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

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

button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

/* ---- Focus ---- */
:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

/* ---- Skip link ----
   translateY(-100%) esconde el link fuera de pantalla según SU PROPIA altura real
   (a diferencia de un `top` negativo fijo, que puede quedar corto si el contenido
   mide más de lo calculado y deja asomar un borde). */
.skip-link {
  position: absolute;
  left: var(--space-md);
  top: var(--space-md);
  background: var(--color-ink);
  color: var(--color-paper);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  z-index: var(--z-toast);
  transform: translateY(-150%);
  transition: transform var(--dur-short) var(--ease-out);
}
.skip-link:focus { transform: translateY(0); }

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

.section {
  padding-block: var(--space-3xl);
}
.section--tight { padding-block: var(--space-2xl); }

.section__head {
  max-width: 42rem;
  margin-bottom: var(--space-2xl);
}
.section__head h2 {
  font-size: var(--text-display-s);
  text-wrap: balance;
}
.section__head p {
  margin-top: var(--space-md);
  font-size: var(--text-md);
  color: var(--color-ink-2);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-weight: 600;
  font-size: var(--text-base);
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-md);
  white-space: nowrap;
  min-height: 44px;
  letter-spacing: 0.01em;
  transition: background-color var(--dur-short) var(--ease-out),
              color var(--dur-short) var(--ease-out),
              transform 100ms var(--ease-out),
              border-color var(--dur-short) var(--ease-out);
}
.btn:active { transform: translateY(1px); }

/* Monochrome system: no chromatic accent, so hover reads as a lighten-on-dark shift
   (var(--color-accent-2) is a lighter charcoal than ink) rather than a colour change. */
.btn--primary {
  background: var(--color-ink);
  color: var(--color-paper);
  border: 1px solid var(--color-ink);
}
.btn--primary:hover { background: var(--color-accent-2); border-color: var(--color-accent-2); }

.btn--outline {
  background: transparent;
  color: var(--color-ink);
  border: 1px solid var(--color-rule);
}
.btn--outline:hover { border-color: var(--color-ink); background: var(--color-paper-2); }

.btn--accent {
  background: var(--color-ink);
  color: var(--color-accent-ink);
  border: 1px solid var(--color-ink);
}
.btn--accent:hover { background: var(--color-accent-2); border-color: var(--color-accent-2); }

.btn--warm {
  background: var(--color-accent-warm);
  color: var(--color-accent-warm-ink);
  border: 1px solid var(--color-accent-warm);
}
.btn--warm:hover { background: var(--color-accent-warm-2); border-color: var(--color-accent-warm-2); }

.link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  font-weight: 600;
  color: var(--color-ink);
  white-space: nowrap;
  border-bottom: 1px solid var(--color-rule);
  padding-bottom: 2px;
  transition: border-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out);
}
.link:hover { color: var(--color-accent); border-color: var(--color-accent); }
.link svg { transition: transform var(--dur-short) var(--ease-out); }
.link:hover svg { transform: translateX(3px); }

/* ---- Placeholder asset block ---- */
.placeholder {
  position: relative;
  display: flex;
  align-items: flex-end;
  background:
    repeating-linear-gradient(135deg,
      var(--color-placeholder-stripe) 0 12px,
      var(--color-placeholder-bg) 12px 24px);
  border: 1px dashed var(--color-rule);
  border-radius: var(--radius-md);
  overflow: hidden;
  min-height: 12rem;
}
.placeholder__label {
  margin: var(--space-md);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-placeholder-ink);
  letter-spacing: 0.02em;
}

/* ---- Reveal-on-load ---- */
.reveal {
  opacity: 0;
  transform: translateY(10px);
  animation: reveal var(--dur-long) var(--ease-out) forwards;
  animation-delay: calc(var(--i, 0) * 70ms);
}
@keyframes reveal { to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  .reveal {
    animation-duration: 150ms !important;
    animation-delay: 0ms !important;
  }
}

/* ---- Visually hidden (a11y) ---- */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}