/* ==========================================================================
   Base: reset, tipografía, layout, botones, utilidades
   ========================================================================== */

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

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

html.is-locked { overflow: hidden; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv11";
  overflow-x: clip;
}

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

h1, h2, h3, h4, h5, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }

h1, h2, h3, h4 {
  color: var(--c-heading);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

p { text-wrap: pretty; }

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

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

::selection { background: var(--c-accent-100); color: var(--c-primary); }

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--r-xs);
}

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.icon {
  width: 1.25em;
  height: 1.25em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

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

.skip-link {
  position: fixed;
  top: 12px; left: 12px;
  z-index: 100;
  padding: .6rem 1rem;
  border-radius: var(--r-sm);
  background: var(--c-primary);
  color: #fff;
  font-weight: 500;
  transform: translateY(-160%);
  transition: transform var(--dur-base) var(--ease-out);
}
.skip-link:focus-visible { transform: none; }

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

.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--section-y); position: relative; }
.section--subtle { background: var(--c-bg-subtle); }
.section--tight { padding-block: calc(var(--section-y) * .75); }

/* ---------- Encabezados de sección ---------- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-accent-600);
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 0 4px var(--c-accent-50);
}
.eyebrow .icon { width: 1rem; height: 1rem; }
.eyebrow:has(.icon)::before { display: none; }
.eyebrow--light { color: var(--c-accent-300); }
.eyebrow--light::before { background: var(--c-accent-300); box-shadow: 0 0 0 4px rgba(127, 205, 227, .14); }

.section-head { max-width: 760px; margin-bottom: clamp(2.5rem, 2rem + 2vw, 3.5rem); }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head--split {
  max-width: none;
  display: grid;
  gap: 1.5rem;
  align-items: end;
}
@media (min-width: 1024px) {
  .section-head--split { grid-template-columns: minmax(0, 1fr) auto; gap: 3rem; }
  .section-head--split .section-title { max-width: 640px; }
}

.section-title {
  font-size: var(--fs-2xl);
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.section-lead {
  margin-top: 1.1rem;
  font-size: var(--fs-md);
  color: var(--c-text-muted);
  max-width: 62ch;
}
.section-head--center .section-lead { margin-inline: auto; }

.subhead {
  font-size: var(--fs-xl);
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
}

.text-gradient {
  background: linear-gradient(100deg, var(--c-accent-300) 0%, var(--c-accent) 60%, var(--c-accent-400) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Botones ---------- */

.btn {
  --btn-h: 44px;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  height: var(--btn-h);
  padding: 0 1.15rem;
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  font-size: .95rem;
  font-weight: 550;
  letter-spacing: -0.005em;
  white-space: nowrap;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition:
    transform var(--dur-fast) var(--ease-out),
    background-color var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out),
    color var(--dur-base) var(--ease-out);
}
.btn:active { transform: scale(.97); }
.btn .icon { width: 1.1rem; height: 1.1rem; }
.btn .icon--arrow { transition: transform var(--dur-base) var(--ease-out); }

.btn--sm { --btn-h: 38px; padding: 0 .95rem; font-size: .9rem; }
.btn--lg { --btn-h: 52px; padding: 0 1.5rem; font-size: 1rem; border-radius: 12px; }
.btn--block { width: 100%; }

.btn--primary {
  background: var(--c-accent);
  color: #fff;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, .22),
    0 1px 2px rgba(4, 20, 31, .25),
    0 0 0 1px rgba(8, 36, 58, .10);
}

.btn--glass {
  background: rgba(255, 255, 255, .08);
  border-color: rgba(255, 255, 255, .18);
  color: #fff;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.btn--outline {
  background: #fff;
  border-color: var(--c-border-strong);
  color: var(--c-primary);
  box-shadow: var(--shadow-xs);
}

.btn--dark { background: var(--c-primary); color: #fff; }

@media (hover: hover) and (pointer: fine) {
  .btn--primary:hover { background: var(--c-accent-600); }
  .btn--glass:hover { background: rgba(255, 255, 255, .16); border-color: rgba(255, 255, 255, .3); }
  .btn--outline:hover { background: var(--c-bg-subtle); border-color: var(--c-primary-700); }
  .btn--dark:hover { background: var(--c-primary-800); }
  .btn:hover .icon--arrow { transform: translateX(3px); }
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  height: 32px;
  padding: 0 .75rem;
  border-radius: var(--r-full);
  border: 1px solid var(--c-border);
  background: #fff;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--c-primary);
  transition: border-color var(--dur-base) var(--ease-out), background-color var(--dur-base) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.chip .icon { width: .95rem; height: .95rem; color: var(--c-accent-600); }
.chip:active { transform: scale(.97); }
@media (hover: hover) and (pointer: fine) {
  .chip:hover { border-color: var(--c-accent); background: var(--c-accent-50); }
}

/* ---------- Animaciones de entrada (solo si hay JS) ---------- */

.js [data-reveal] {
  opacity: 0;
  transform: translate3d(0, 18px, 0);
  filter: blur(6px);
  transition:
    opacity .8s var(--ease-out),
    transform .8s var(--ease-out),
    filter .8s var(--ease-out);
  transition-delay: calc(var(--i, 0) * 70ms);
}
.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
  filter: none;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .js [data-reveal] { opacity: 1; transform: none; filter: none; }
}