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

html { scroll-behavior: smooth; }

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 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;
}

.container {
  width: min(100% - 2.5rem, var(--max-width));
  margin-inline: auto;
}

.section-pad {
  padding-block: var(--space-5xl);
}

.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .fade-in { opacity: 1; transform: none; transition: none; }
}

/* AI NEXUS GROUP — utilidades de gradiente corporativo */
.text-gradient-nexus {
  background: var(--gradient-nexus);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.bg-gradient-nexus {
  background: var(--gradient-nexus);
}

.bg-gradient-nexus-diagonal {
  background: var(--gradient-nexus-diagonal);
}

.check-list {
  display: grid;
  gap: 0.85rem;
  margin-top: var(--space-xl);
}

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.5;
}

.check-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.15);
  display: grid;
  place-items: center;
}

.check-icon svg {
  width: 12px;
  height: 12px;
  color: var(--color-accent-cyan);
}

.placeholder-note {
  margin-top: var(--space-lg);
  padding-left: var(--space-md);
  border-left: 2px solid var(--color-accent);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-style: italic;
}