:root {
  color-scheme: light dark;
  --teal: #0f766e;
  --sky: #0ea5e9;
  --indigo: #1e3a8a;
  --amber: #fbbf24;

  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --text: #0f172a;
  --text-soft: #475569;
  --border: #e2e8f0;
  --card: #ffffff;
  --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 8px 24px rgba(15, 23, 42, .06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120;
    --bg-soft: #0f172a;
    --text: #e8eef9;
    --text-soft: #a3b1c6;
    --border: #1e293b;
    --card: #111a2e;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--sky); }

.wrap {
  width: min(1040px, 100% - 40px);
  margin-inline: auto;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.site-header nav {
  margin-left: auto;
  display: flex;
  gap: 18px;
  font-size: 15px;
}

.site-header nav a {
  color: var(--text-soft);
  text-decoration: none;
}

.site-header nav a:hover { color: var(--text); }

/* Hero */

.hero {
  position: relative;
  text-align: center;
  padding: 72px 0 64px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -40% 50% auto;
  width: 900px;
  height: 900px;
  transform: translateX(-50%);
  background: radial-gradient(circle at 50% 40%,
    color-mix(in srgb, var(--sky) 26%, transparent),
    transparent 62%);
  pointer-events: none;
}

.hero > * { position: relative; }

.app-icon {
  width: 112px;
  height: 112px;
  border-radius: 25%;
  box-shadow: var(--shadow);
}

.hero h1 {
  margin: 24px 0 8px;
  font-size: clamp(34px, 6vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero p.lead {
  margin: 0 auto;
  max-width: 34ch;
  font-size: clamp(17px, 2.4vw, 20px);
  color: var(--text-soft);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--teal), var(--sky) 55%, var(--indigo));
  box-shadow: var(--shadow);
}

.btn-secondary {
  color: var(--text);
  background: var(--card);
  border-color: var(--border);
}

.note {
  margin-top: 14px;
  font-size: 14px;
  color: var(--text-soft);
}

/* Secciones */

section.block { padding: 56px 0; }

section.block.alt { background: var(--bg-soft); border-block: 1px solid var(--border); }

h2 {
  font-size: clamp(24px, 3.4vw, 32px);
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}

.section-lead {
  margin: 0 0 28px;
  color: var(--text-soft);
  max-width: 60ch;
}

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.card .emoji { font-size: 26px; }

.card h3 { margin: 10px 0 6px; font-size: 18px; }

.card p { margin: 0; color: var(--text-soft); font-size: 15px; }

/* Pasos */

ol.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

ol.steps li {
  counter-increment: step;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
}

ol.steps li::before {
  content: counter(step);
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  margin-bottom: 10px;
  border-radius: 50%;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--teal), var(--sky));
}

ol.steps strong { display: block; margin-bottom: 4px; }

ol.steps span { color: var(--text-soft); font-size: 15px; }

/* Texto legal */

.prose { padding: 48px 0 64px; max-width: 72ch; }

.prose h1 { font-size: clamp(28px, 5vw, 38px); margin-bottom: 4px; }

.prose .updated { color: var(--text-soft); font-size: 14px; margin-top: 0; }

.prose h2 { margin-top: 34px; font-size: 21px; }

.prose ul { padding-left: 20px; }

.prose li { margin: 6px 0; }

.prose code {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 6px;
  font-size: 14px;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px;
  color: var(--text-soft);
  font-size: 14px;
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: center;
}

.site-footer nav { margin-left: auto; display: flex; gap: 18px; flex-wrap: wrap; }

.site-footer a { color: var(--text-soft); text-decoration: none; }

.site-footer a:hover { color: var(--text); }

/* Capturas de pantalla */

.shots {
  display: flex;
  gap: 22px;
  margin: 0 -20px;
  padding: 6px 20px 22px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.shot {
  flex: 0 0 236px;
  scroll-snap-align: center;
  text-align: center;
}

.phone {
  position: relative;
  border-radius: 38px;
  padding: 7px;
  background: linear-gradient(160deg, #3a3a3c, #1c1c1e 45%, #000);
  box-shadow: 0 10px 30px rgba(15, 23, 42, .22), 0 2px 6px rgba(15, 23, 42, .14);
}

.phone img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 32px;
  background: var(--bg-soft);
}

.shot h3 {
  margin: 16px 0 4px;
  font-size: 16px;
}

.shot p {
  margin: 0;
  font-size: 14px;
  color: var(--text-soft);
}

.shots-hint {
  margin: 0;
  font-size: 14px;
  color: var(--text-soft);
}

@media (min-width: 900px) {
  .shots { gap: 26px; }
  .shot { flex-basis: 248px; }
}

.prose h3 { margin-top: 24px; font-size: 17px; }