/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

/* ── VARIABLES — Zinc + Blue ── */
:root {
  /* Azules (Tailwind Blue) */
  --color-primary:       #2563eb;   /* blue-600 */
  --color-primary-dark:  #1d4ed8;   /* blue-700 */
  --color-primary-light: #eff6ff;   /* blue-50 */
  --color-primary-mid:   #dbeafe;   /* blue-100 */

  /* Zinc (Tailwind Zinc) */
  --color-dark:          #18181b;   /* zinc-900 */
  --color-text:          #18181b;
  --color-text-mid:      #52525b;   /* zinc-600 */
  --color-text-muted:    #71717a;   /* zinc-500 */
  --color-placeholder:   #a1a1aa;   /* zinc-400 */
  --color-border:        #e4e4e7;   /* zinc-200 */
  --color-surface:       #fafafa;   /* zinc-50 */
  --color-white:         #ffffff;

  /* Legacy aliases */
  --color-navy:   #18181b;
  --color-accent: #2563eb;

  /* Fonts */
  --font-display: 'Inter', sans-serif;
  --font-body:    'DM Sans', sans-serif;

  /* Espaciado base 8px */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --radius-sm: 4px;
  --radius:    6px;
  --radius-lg: 8px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow:    0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.10);

  --transition:    150ms ease-out;
  --transition-md: 200ms ease-out;
}

/* ── BASE ── */
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }

/* ── CONTENEDOR ── */
.section-inner { max-width: 1100px; margin: 0 auto; }

/* ── NAV ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-12);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-dark);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: var(--space-8);
  list-style: none;
}

.nav-links a {
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
  min-height: 44px;
  display: flex;
  align-items: center;
}

.nav-links a:hover,
.nav-links a.active { color: var(--color-dark); }

/* ── EYEBROW ── */
.eyebrow {
  display: block;
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

/* ── SECCIONES ── */
.section-white { padding: var(--space-24) var(--space-12); background: var(--color-white); }
.section-light { padding: var(--space-24) var(--space-12); background: var(--color-surface); }
.section-dark  { padding: var(--space-24) var(--space-12); background: var(--color-dark); }
.section-blue  { padding: var(--space-24) var(--space-12); background: var(--color-primary-light); }

@media (max-width: 768px) {
  .section-white,
  .section-light,
  .section-dark,
  .section-blue { padding: var(--space-16) var(--space-5); }
}

/* ── BOTONES ── */
.btn-primary,
.btn-outline,
.btn-outline-dark,
.btn-outline-white {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition-md);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(37,99,235,0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-dark);
  border-color: var(--color-border);
}
.btn-outline:hover {
  border-color: var(--color-dark);
  background: var(--color-surface);
}

.btn-outline-dark {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.25);
}
.btn-outline-dark:hover {
  border-color: var(--color-white);
  background: rgba(255,255,255,0.08);
}

.btn-outline-white {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.35);
}
.btn-outline-white:hover {
  border-color: var(--color-white);
  background: rgba(255,255,255,0.08);
}

/* ── CARDS ── */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--transition-md);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* ── PAGE HERO (subpáginas) ── */
.page-hero {
  background: var(--color-surface);
  padding: var(--space-32) var(--space-12) var(--space-24);
  border-bottom: 1px solid var(--color-border);
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--color-dark);
  max-width: 20ch;
  margin-top: var(--space-3);
}

.page-hero p {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-top: var(--space-6);
}

/* ── CTA DARK ── */
.cta-dark { text-align: center; }

.cta-dark h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-white);
  max-width: 22ch;
  margin: var(--space-4) auto var(--space-5);
  letter-spacing: -0.02em;
}

.cta-dark p {
  font-size: 1rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.55);
  max-width: 50ch;
  margin: 0 auto var(--space-8);
}

/* ── FOOTER ── */
footer {
  background: var(--color-dark);
  padding: var(--space-10) var(--space-12);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.01em;
}

.footer-links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  text-decoration: none;
  transition: color var(--transition);
  min-height: 44px;
  display: flex;
  align-items: center;
}
.footer-links a:hover { color: rgba(255,255,255,0.8); }

.footer-copy {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.3);
}

@media (max-width: 768px) {
  nav { padding: var(--space-4) var(--space-5); }
  footer { padding: var(--space-8) var(--space-5); flex-direction: column; align-items: flex-start; gap: var(--space-4); }
  .footer-links { gap: var(--space-4); }
}