/* ==========================================================================
   BASE — reset, tipografía, layout primitivo, utilidades y animación de scroll
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-synthesis-weight: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.is-locked { overflow: hidden; }

h1, h2, h3, h4, h5 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-display);
  text-wrap: balance;
}

p { margin: 0; }
figure, blockquote { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}

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

button {
  font: inherit;
  color: inherit;
  border: 0;
  background: none;
  cursor: pointer;
}

::selection { background: var(--blue); color: var(--white); }

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}

.on-navy :focus-visible,
.section--navy :focus-visible { outline-color: var(--white); }

/* --------------------------------------------------------------------------
   Accesibilidad
   -------------------------------------------------------------------------- */

.skip-link {
  position: absolute;
  left: var(--sp-4);
  top: -100px;
  z-index: 999;
  padding: var(--sp-3) var(--sp-5);
  background: var(--blue);
  color: var(--white);
  border-radius: var(--r-sm);
  font-size: var(--fs-sm);
  font-weight: 600;
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: var(--sp-4); }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--wide   { max-width: var(--container-wide); }
.container--narrow { max-width: var(--container-narrow); }

.section {
  position: relative;
  padding-block: var(--section-y);
}
.section--lg    { padding-block: var(--section-y-lg); }
.section--flush-top { padding-top: 0; }

.section--light { background: var(--white); color: var(--ink); }
.section--mist  { background: var(--mist);  color: var(--ink); }
.section--navy  { background: var(--navy);  color: var(--on-navy); }
.section--navy h1, .section--navy h2, .section--navy h3, .section--navy h4 { color: var(--on-navy); }

/* Grano/luz sutil sobre los fondos navy — profundidad sin ruido */
.section--navy::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(1100px 620px at 78% -10%, rgba(40, 91, 203, 0.30), transparent 62%),
    radial-gradient(760px 520px at 4% 106%, rgba(40, 91, 203, 0.16), transparent 60%);
}
.section--navy > * { position: relative; z-index: 1; }

.stack   { display: grid; gap: var(--sp-5); }
.stack-6 { display: grid; gap: var(--sp-6); }
.stack-8 { display: grid; gap: var(--sp-8); }

.grid { display: grid; gap: var(--sp-6); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 1000px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 660px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
}

/* --------------------------------------------------------------------------
   Tipografía de sección
   -------------------------------------------------------------------------- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--blue);
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--blue);
  flex: none;
}
.section--navy .eyebrow { color: #7FA3F0; }
.section--navy .eyebrow::before { background: #7FA3F0; }

.section-head { max-width: 62ch; }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head--center .eyebrow { justify-content: center; }

.title-display { font-size: var(--fs-display); }
.title-1 { font-size: var(--fs-h1); }
.title-2 { font-size: var(--fs-h2); }
.title-3 { font-size: var(--fs-h3); letter-spacing: -0.01em; }

.subtitle {
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--blue);
}
.section--navy .subtitle { color: #7FA3F0; }

.lead {
  font-size: var(--fs-lead);
  line-height: 1.7;
  color: var(--ink-2);
  max-width: 62ch;
}
.section--navy .lead { color: var(--on-navy-2); }

.text-muted { color: var(--ink-muted); }
.section--navy .text-muted { color: var(--on-navy-muted); }

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--line);
}
.section--navy .rule { background: var(--line-on-navy); }

/* --------------------------------------------------------------------------
   Revelado al hacer scroll
   -------------------------------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translate3d(0, 22px, 0);
  transition:
    opacity var(--dur-slow) var(--ease-out),
    transform var(--dur-slow) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
  will-change: auto;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}