/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--navy);
  color: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Design tokens ── */
:root {
  --navy:       #0a1628;
  --navy-mid:   #0d1f3c;
  --blue:       #1a3a6b;
  --accent:     #2563eb;
  --accent-dark:#1d4ed8;
  --light:      #e8f0fe;
  --white:      #ffffff;
  --gray:       #94a3b8;
  --gold:       #f59e0b;
  --green:      #22c55e;
  --whatsapp:   #25d366;
  --whatsapp-dk:#1da851;
  --footer-bg:  #060e1a;

  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --radius-xl:  20px;
  --radius-2xl: 24px;
  --radius-pill:100px;

  --shadow-btn:      0 4px 24px rgba(37,99,235,0.35);
  --shadow-btn-hover:0 8px 32px rgba(37,99,235,0.5);

  --transition-fast: 0.2s;
  --transition-mid:  0.3s;
  --transition-slow: 0.7s;
}

/* ── Tipografía global ── */
h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--white);
  margin-bottom: 1rem;
}
p.lead {
  color: var(--gray);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 2.5rem;
  text-align: center;
}

/* ── Layout helpers ── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
.section {
  padding: 6rem 0;
  text-align: center;
}
.tag {
  display: inline-block;
  background: rgba(37,99,235,0.15);
  color: var(--accent);
  border: 1px solid rgba(37,99,235,0.3);
  border-radius: var(--radius-pill);
  padding: 0.35rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

/* ── Botones ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent);
  color: var(--white);
  padding: 0.85rem 2rem;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  box-shadow: var(--shadow-btn);
  transition: background var(--transition-mid), box-shadow var(--transition-mid), transform var(--transition-fast);
}
.btn-primary:hover {
  background: var(--accent-dark);
  box-shadow: var(--shadow-btn-hover);
  transform: translateY(-2px);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  background: transparent;
  color: var(--white);
  padding: 0.85rem 2rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border: 2px solid rgba(255,255,255,0.3);
  transition: border-color var(--transition-mid), background var(--transition-mid);
}
.btn-secondary:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.07);
}
.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--whatsapp);
  color: var(--white);
  padding: 0.85rem 2rem;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(37,211,102,0.35);
  transition: background var(--transition-mid), transform var(--transition-fast);
}
.btn-whatsapp:hover {
  background: var(--whatsapp-dk);
  transform: translateY(-2px);
}

/* ── Scroll reveal ── */
.reveal, .reveal-left, .reveal-right {
  opacity: 0;
  transition: opacity var(--transition-slow) ease, transform var(--transition-slow) ease;
}
.reveal         { transform: translateY(30px); }
.reveal-left    { transform: translateX(-40px); }
.reveal-right   { transform: translateX(40px); }

.reveal.visible,
.reveal-left.visible,
.reveal-right.visible {
  opacity: 1;
  transform: none;
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.35s; }
.delay-4 { transition-delay: 0.5s; }