:root {
  --ink: #16171b;
  --ink-soft: #55575e;
  --ink-faint: #8b8d95;
  --bg: #ffffff;
  --bg-alt: #f6f6f4;
  --line: #e6e6e2;
  --accent: #3b53d6;
  --accent-ink: #ffffff;
  --max: 720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #ecedf1;
    --ink-soft: #a2a4ac;
    --ink-faint: #71737c;
    --bg: #131418;
    --bg-alt: #17181c;
    --line: #2b2d34;
    --accent: #8ba0ff;
    --accent-ink: #10121a;
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}

/* ---------- nav ---------- */

.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 22px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.nav nav {
  display: flex;
  align-items: center;
  gap: 18px;
}
.nav nav > a:first-child {
  color: var(--ink-soft);
  font-size: 0.9rem;
}
.nav nav > a:first-child:hover {
  color: var(--ink);
}

.wordmark {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

/* ---------- botones ---------- */

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 120ms ease, filter 140ms ease, border-color 140ms ease;
}
.btn:active {
  transform: translateY(1px);
}
.btn--primary {
  background: var(--accent);
  color: var(--accent-ink);
}
.btn--primary:hover {
  filter: brightness(1.07);
}
.btn--ghost {
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 9px 16px;
  font-size: 0.9rem;
}
.btn--ghost:hover {
  border-color: var(--accent);
}

/* ---------- secciones ---------- */

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
}

section {
  padding: 64px 0;
  border-top: 1px solid var(--line);
}
section:first-child {
  border-top: 0;
}

h1 {
  font-size: clamp(2rem, 1.3rem + 3.4vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  text-wrap: balance;
}
h2 {
  font-size: 1.4rem;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.lead {
  margin-top: 20px;
  font-size: 1.12rem;
  color: var(--ink-soft);
  max-width: 60ch;
}

.hero {
  padding-top: 40px;
}
.hero__cta {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 18px;
}
.hero__note {
  font-size: 0.85rem;
  color: var(--ink-faint);
  max-width: 34ch;
}

/* pasos */

.steps ol {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 28px;
}
.steps li {
  padding-left: 46px;
  position: relative;
}
.steps__n {
  position: absolute;
  left: 0;
  top: 1px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  font-weight: 700;
  font-size: 0.85rem;
}
.steps p {
  color: var(--ink-soft);
}

.audience p {
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.what__grid {
  display: grid;
  gap: 28px 40px;
  grid-template-columns: 1fr 1fr;
}
.what__grid ul {
  padding-left: 18px;
  color: var(--ink-soft);
  display: grid;
  gap: 8px;
}
.what__grid h3 {
  color: var(--ink-faint);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.cta-final {
  text-align: center;
}
.cta-final p {
  color: var(--ink-soft);
  margin: 6px 0 24px;
}

/* ---------- pie ---------- */

.foot {
  max-width: var(--max);
  margin: 0 auto;
  padding: 40px 20px 64px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  font-size: 0.85rem;
  color: var(--ink-faint);
}
.foot nav {
  display: flex;
  gap: 16px;
}
.foot a {
  color: var(--ink-faint);
}
.foot a:hover {
  color: var(--ink-soft);
}

@media (max-width: 560px) {
  .what__grid {
    grid-template-columns: 1fr;
  }
  section {
    padding: 48px 0;
  }
  .nav {
    padding: 18px 16px;
  }
  /* El ancla "Cómo funciona" cabe con el scroll; en móvil solo el botón. */
  .nav nav > a:first-child {
    display: none;
  }
  .btn {
    padding: 11px 18px;
  }
  .btn--ghost {
    padding: 9px 14px;
  }
  main {
    padding: 0 16px;
  }
  .lead {
    font-size: 1.05rem;
  }
  .hero {
    padding-top: 28px;
  }
  .foot {
    justify-content: center;
  }
}