/* Base global — impeccable (jerarquía, ritmo, contraste) + mobile-native (baseline táctil) */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 12px);
}

figure { margin: 0; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-background);
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.08;
  letter-spacing: -0.025em;
  text-wrap: balance;
  margin: 0 0 0.6em;
  color: var(--color-primary-ink);
}

h1 { font-size: var(--fs-hero); font-weight: 800; }
h2 { font-size: var(--fs-h2); font-weight: 800; }
h3 { font-size: var(--fs-h3); font-weight: 700; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-size: 0.76rem; font-weight: 800; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--color-primary);
  margin: 0 0 0.8rem;
}
.eyebrow::before {
  content: ""; width: 26px; height: 3px; border-radius: 99px;
  background: var(--grad-accent);
  display: inline-block;
}
.eyebrow--light { color: var(--color-accent); }
.eyebrow--light::before { background: var(--grad-accent); }

.check-list { list-style: none; margin: 1.3rem 0 0; padding: 0; display: grid; gap: 0.65rem; }
.check-list li {
  display: flex; align-items: center; gap: 0.7rem;
  font-weight: 600; font-size: 0.98rem;
}
.check-list li::before {
  content: "✓";
  width: 26px; height: 26px; flex: none;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff; font-size: 0.8rem; font-weight: 800;
}

p { margin: 0 0 1em; max-width: 72ch; }
.lead { font-size: var(--fs-lead); color: var(--color-text); max-width: 62ch; }

a { color: var(--color-primary); }
img { max-width: 100%; height: auto; display: block; }

::selection { background: var(--color-primary); color: #fff; }
::-webkit-scrollbar { width: 12px; }
::-webkit-scrollbar-track { background: var(--color-surface-alt); }
::-webkit-scrollbar-thumb { background: var(--color-primary); border-radius: 8px; border: 3px solid var(--color-surface-alt); }

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  width: min(var(--container-width), 100% - (var(--container-padding) * 2));
  margin-inline: auto;
}

.section { padding: clamp(4rem, 8vw, 6.8rem) 0; position: relative; }
.section--white { background: var(--color-white); }
.section--alt { background: linear-gradient(180deg, var(--color-surface-alt) 0%, #e2eaf1 100%); border-block: 1px solid var(--color-border); }
.section--primary { background: var(--grad-dark); color: var(--color-text-inverse); overflow: clip; }
.section--primary::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: repeating-linear-gradient(-45deg, rgba(255,255,255,0.035) 0 2px, transparent 2px 14px);
}
.section--primary h2, .section--primary h3 { color: #fff; }
.section--primary .lead { color: var(--color-secondary-light); }

.section-head { max-width: 780px; margin-bottom: clamp(2rem, 4vw, 3.2rem); }
.section-head h2 { text-wrap: balance; }
.section-head h2::after {
  content: ""; display: block; width: 56px; height: 4px; border-radius: 99px;
  background: var(--grad-accent); margin-top: 0.9rem;
}
.section--primary .section-head h2::after { background: var(--grad-accent); }
.section-head p { color: var(--color-text-secondary); }
.section--primary .section-head p { color: var(--color-secondary-light); }

/* Enlaces con underline animado — emilkowalski: ease, 160ms, solo transform/opacity */
.nav-link {
  position: relative;
  text-decoration: none;
  color: inherit;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 2px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  opacity: 0;
  transition: transform var(--transition-normal), opacity var(--transition-fast);
}
@media (hover: hover) and (pointer: fine) {
  .nav-link:hover::after { transform: scaleX(1); opacity: 1; }
}
.nav-link.active::after { transform: scaleX(1); opacity: 1; }

/* Botones — premium: gradiente, sombra y lift. Feedback press scale(0.97) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  min-height: 54px;
  padding: 0.9rem 1.9rem;
  border-radius: var(--radius-pill);
  font-weight: 800;
  font-size: 1rem;
  line-height: 1;
  letter-spacing: -0.01em;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
  transition: transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast);
}
.btn:active { transform: scale(0.97); }
.btn--primary { background: var(--grad-primary); color: #fff; box-shadow: var(--shadow-md); border-color: rgba(255,255,255,0.12); }
@media (hover: hover) and (pointer: fine) {
  .btn--primary:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); filter: brightness(1.06); }
}
.btn--secondary { background: rgba(255,255,255,0.1); color: #fff; border-color: rgba(255,255,255,0.55); backdrop-filter: blur(8px); }
@media (hover: hover) and (pointer: fine) {
  .btn--secondary:hover { border-color: var(--color-accent); background: rgba(255,255,255,0.16); transform: translateY(-2px); }
}
.btn--outline { background: #fff; color: var(--color-primary); border-color: var(--color-primary); box-shadow: var(--shadow-sm); }
@media (hover: hover) and (pointer: fine) {
  .btn--outline:hover { background: var(--color-primary); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
}
.btn--light { background: var(--grad-accent); color: #231600; box-shadow: var(--shadow-accent); border-color: rgba(0,0,0,0.06); }
@media (hover: hover) and (pointer: fine) {
  .btn--light:hover { transform: translateY(-2px); filter: brightness(1.04); box-shadow: var(--shadow-lg); }
}

/* Formularios — premium */
input, textarea, select {
  font-size: 16px; /* mobile-native: evita zoom iOS */
  font-family: inherit;
  width: 100%;
  padding: 0.9rem 1.05rem;
  border: 1.5px solid var(--color-border);
  border-radius: 12px;
  background: #f8fafc;
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(0, 56, 130, 0.14);
}
label { font-weight: 600; font-size: var(--fs-small); display: block; margin-bottom: 0.35rem; }
.field { margin-bottom: 1rem; }
.field-error { color: #b3261e; font-size: 0.85rem; margin-top: 0.3rem; min-height: 1.2em; }
input[aria-invalid="true"], textarea[aria-invalid="true"], select[aria-invalid="true"] { border-color: #b3261e; }

/* Reveal on scroll — una sola firma de movimiento, fade+translate 420ms ease-out, stagger corto */
.reveal { opacity: 0; transform: translateY(18px); }
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.reveal[data-delay="1"] { transition-delay: 60ms; }
.reveal[data-delay="2"] { transition-delay: 120ms; }
.reveal[data-delay="3"] { transition-delay: 180ms; }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--color-primary); color: #fff;
  padding: 0.7rem 1.2rem; border-radius: 0 0 8px 0; z-index: 200;
}
.skip-link:focus { left: 0; }

/* Texto solo para lectores de pantalla (SEO/accesibilidad sin manchar el diseño) */
.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;
}

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