/* ============================================================
   base.css — Reset ligero + tipografía + layout base
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  -moz-tab-size: 4;
  tab-size: 4;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + var(--sp-3));
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--ff-body);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  min-height: 100dvh;
}

img, svg, video, canvas, picture { display: block; max-width: 100%; height: auto; }
img { font-style: italic; background-repeat: no-repeat; background-size: cover; shape-margin: .75rem; }

button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }

a { color: var(--c-brand); text-decoration: none; transition: color var(--dur-fast) var(--ease-out); }
a:hover, a:focus-visible { color: var(--c-brand-soft); }

:focus-visible {
  outline: 2px solid var(--c-brand);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

h1, h2, h3, h4, h5 {
  font-family: var(--ff-display);
  font-weight: var(--fw-normal);
  line-height: var(--lh-tight);
  letter-spacing: -0.01em;
  margin: 0;
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p { margin: 0 0 var(--sp-4); }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0; padding-left: 1.2em; }

hr {
  border: 0;
  height: 1px;
  background: var(--c-line);
  margin: var(--sp-7) 0;
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-5);
}
.container--narrow { max-width: var(--container-narrow); }

.section {
  padding-block: var(--sp-9);
}
@media (max-width: 768px) {
  .section { padding-block: var(--sp-7); }
}

.eyebrow {
  display: inline-block;
  font-family: var(--ff-body);
  font-size: var(--fs-micro);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--c-brand);
  margin-bottom: var(--sp-3);
}

.lead {
  font-size: var(--fs-lead);
  line-height: var(--lh-loose);
  color: var(--c-text-muted);
  max-width: 65ch;
}

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

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

/* Botones base */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 0.85em 1.6em;
  font-family: var(--ff-body);
  font-size: var(--fs-body);
  font-weight: var(--fw-medium);
  letter-spacing: 0.02em;
  line-height: 1;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  transition: background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
  cursor: pointer;
  text-decoration: none;
  min-height: 44px; /* accesibilidad touch target */
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--c-brand);
  color: var(--c-brand-ink);
}
.btn--primary:hover { background: var(--c-brand-soft); color: var(--c-brand-ink); }

.btn--ghost {
  background: transparent;
  color: var(--c-text);
  border-color: var(--c-line);
}
.btn--ghost:hover { border-color: var(--c-brand); color: var(--c-brand); }

.btn--sm { padding: 0.55em 1em; font-size: var(--fs-small); min-height: 36px; }
.btn--lg { padding: 1em 2em; font-size: var(--fs-lead); }