:root {
  --bg: #f7f7f7;
  --card: #ffffff;
  --ink: #1a1a1a;
  --muted: #666;
  --line: #e2e2e2;
  --wa: #25d366;
  --wa-dark: #1ebe5a;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "Poppins", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.container { width: min(1040px, 92%); margin: 0 auto; }

/* Header */
.header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0;
}
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; font-weight: 700; }
.brand img { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; }
.nav { display: flex; gap: 1.2rem; align-items: center; font-size: 0.95rem; }
.nav a { text-decoration: none; color: var(--muted); }
.nav a:hover { color: var(--ink); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid var(--ink);
  color: var(--ink);
  background: transparent;
  transition: transform .15s, background .15s, color .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn-wa { background: var(--wa); border-color: var(--wa); color: #fff; }
.btn-wa:hover { background: var(--wa-dark); border-color: var(--wa-dark); }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.9rem; }
.btn svg { width: 20px; height: 20px; fill: currentColor; }

/* Hero */
.hero { padding: 3rem 0 2rem; text-align: center; }
.hero .banner {
  border-radius: 18px;
  border: 1px solid var(--line);
  margin: 0 auto 1.5rem;
  box-shadow: 0 10px 30px rgba(0,0,0,.06);
}
.hero h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 700; line-height: 1.2; }
.hero p { color: var(--muted); font-size: 1.1rem; max-width: 620px; margin: 1rem auto 1.8rem; }
.hero .cta { display: flex; gap: 0.8rem; justify-content: center; flex-wrap: wrap; }

.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;
}

/* Pantalla "Cómo funciona": compensa el header fijo y ocupa una pantalla */
#como-funciona {
  scroll-margin-top: 62px;
  padding-top: 2.5rem;
}
@media (max-width: 600px) {
  .hero { padding: 1.5rem 0 0.5rem; }
  .hero p { margin: 0.8rem auto 1.2rem; }
  section { padding: 1.5rem 0; }
  section h2 { font-size: 1.5rem; margin-bottom: 1.1rem; }
  #como-funciona { padding: 1.2rem 0 0; }
  .models { padding-top: 0.5rem; }
  .card { padding: 1.2rem; }
  .models p { font-size: 0.95rem; }
  .models .chips { margin-top: 0.7rem; }
  .final { padding: 2rem 0; }
}

/* Sections */
section { padding: 3rem 0; }
section h2 { font-size: 1.7rem; text-align: center; margin-bottom: 2rem; }
.grid { display: grid; gap: 1.2rem; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.5rem;
}
.card .num {
  width: 38px; height: 38px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  display: grid; place-items: center;
  font-weight: 700;
  margin-bottom: 0.8rem;
}
.card h3 { font-size: 1.05rem; margin-bottom: 0.4rem; }
.card p { color: var(--muted); font-size: 0.95rem; }

.models { text-align: center; color: var(--muted); }
.models .chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem; margin-top: 1rem; }
.chip { border: 1px solid var(--line); background: var(--card); border-radius: 999px; padding: 0.35rem 0.9rem; font-size: 0.9rem; color: var(--ink); }

.final { text-align: center; background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.final p { color: var(--muted); margin-bottom: 1.4rem; }

/* Footer */
.footer { padding: 2rem 0; text-align: center; color: var(--muted); font-size: 0.9rem; }
.footer .links { display: flex; gap: 1.2rem; justify-content: center; margin-bottom: 0.6rem; flex-wrap: wrap; }
.footer a { text-decoration: none; }
.footer a:hover { color: var(--ink); }

/* Floating WhatsApp */
.wa-float {
  position: fixed; right: 18px; bottom: 18px;
  width: 58px; height: 58px; border-radius: 50%;
  background: var(--wa); color: #fff;
  display: grid; place-items: center;
  box-shadow: 0 8px 22px rgba(37,211,102,.4);
  z-index: 20;
}
.wa-float svg { width: 30px; height: 30px; fill: #fff; }

/* Legal page */
.legal { max-width: 760px; margin: 0 auto; padding: 3rem 0; }
.legal h1 { font-size: 2rem; margin-bottom: 0.5rem; }
.legal .date { color: var(--muted); margin-bottom: 2rem; }
.legal h2 { font-size: 1.2rem; text-align: left; margin: 1.8rem 0 0.5rem; }
.legal p, .legal li { color: #333; }
.legal ul { padding-left: 1.3rem; }

/* Carrusel de pasos (solo móvil) */
.dots { display: none; }

@media (max-width: 600px) {
  .nav .hide-m { display: none; }
  .brand span { display: none; }

  .steps {
    display: flex;
    gap: 16px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: 0 0 0.5rem;
  }
  .steps::-webkit-scrollbar { display: none; }
  .steps .card {
    flex: 0 0 100%;
    scroll-snap-align: start;
  }
  .dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 0.5rem;
  }
  .dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--line);
    transition: background .2s, transform .2s;
    cursor: pointer;
  }
  .dot.active { background: var(--ink); transform: scale(1.25); }
}