:root {
  --bg: #ffffff;
  --bg-alt: #f4f7f6;
  --surface: #ffffff;
  --text: #15191e;
  --muted: #5d6673;
  --border: #e2e7ea;
  --primary: #0f7b5f;
  --primary-strong: #0a5c47;
  --primary-soft: #e6f4ef;
  --on-primary: #ffffff;
  --chat-bg: #efeae2;
  --bubble-in: #ffffff;
  --bubble-out: #d9fdd3;
  --shadow: 0 1px 2px rgb(16 24 40 / 6%), 0 12px 32px rgb(16 24 40 / 10%);
  --radius: 16px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1215;
    --bg-alt: #13191d;
    --surface: #182025;
    --text: #e8ecef;
    --muted: #9aa5b1;
    --border: #26313a;
    --primary: #1fa37f;
    --primary-strong: #34c095;
    --primary-soft: #133429;
    --chat-bg: #0b141a;
    --bubble-in: #1f2c34;
    --bubble-out: #005c4b;
    --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 12px 32px rgb(0 0 0 / 35%);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { display: block; }
a { color: inherit; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 5vw, 3.25rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.25rem); font-weight: 750; }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }

.wrap { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 820px; }
.center { text-align: center; }
.eyebrow {
  color: var(--primary); font-weight: 700; font-size: .85rem;
  text-transform: uppercase; letter-spacing: .08em; margin-bottom: .6em;
}
.lead { font-size: 1.12rem; color: var(--muted); }
.lead strong, .lead b { color: var(--text); }
.hl { color: var(--primary); }

/* Botones */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4em;
  padding: .6em 1.1em; border-radius: 999px; font-weight: 650; font-size: .95rem;
  text-decoration: none; border: 1.5px solid transparent; white-space: nowrap;
  transition: background .15s, border-color .15s, transform .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn:focus-visible, .menu-toggle:focus-visible, summary:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
.btn-lg { padding: .85em 1.5em; font-size: 1.02rem; }
.btn-primary { background: var(--primary); color: var(--on-primary); }
.btn-primary:hover { background: var(--primary-strong); }
.btn-ghost { border-color: var(--border); background: var(--surface); }
.btn-ghost:hover { border-color: var(--primary); }
.btn-light { background: #fff; color: #0a5c47; }
.btn-outline-light { border-color: rgb(255 255 255 / 60%); color: #fff; }
.btn-outline-light:hover { border-color: #fff; }

/* Barra superior */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner { display: flex; align-items: center; gap: 24px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-size: 1.08rem; }
.brand b { color: var(--primary); }
.brand.small { font-size: .95rem; }
.nav { display: flex; gap: 22px; margin-left: auto; }
.nav a { text-decoration: none; color: var(--muted); font-weight: 550; font-size: .95rem; }
.nav a:hover { color: var(--text); }
.nav .nav-login { display: none; }
.topbar-actions { display: flex; gap: 10px; align-items: center; }
.menu-toggle { display: none; }

/* Portada */
.hero { padding: 64px 0 72px; background: radial-gradient(1000px 500px at 85% 10%, var(--primary-soft), transparent 70%); }
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin: 28px 0 22px; }
.hero-cta.center { justify-content: center; }
.hero-points { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px 22px; color: var(--muted); font-size: .95rem; }
.hero-points li::before { content: "✓"; color: var(--primary); font-weight: 800; margin-right: 6px; }

.hero-visual { position: relative; min-height: 520px; }
.phone {
  width: 300px; max-width: 100%; margin-left: auto;
  border-radius: 34px; padding: 10px; background: #111; box-shadow: var(--shadow);
}
.phone-head {
  display: flex; gap: 10px; align-items: center; padding: 12px 14px;
  background: #075e54; color: #fff; border-radius: 26px 26px 0 0; font-size: .92rem;
}
.phone-head small { display: block; opacity: .8; font-size: .75rem; }
.avatar { width: 36px; height: 36px; border-radius: 50%; background: #fff; display: grid; place-items: center; font-size: 1.1rem; }
.chat {
  background: var(--chat-bg); padding: 14px 12px 18px; border-radius: 0 0 26px 26px;
  display: flex; flex-direction: column; gap: 8px; font-size: .86rem; line-height: 1.45; color: var(--text);
}
.msg { max-width: 85%; padding: 7px 10px; border-radius: 10px; box-shadow: 0 1px .5px rgb(0 0 0 / 13%); }
.msg.in { background: var(--bubble-in); align-self: flex-start; border-top-left-radius: 2px; }
.msg.out { background: var(--bubble-out); align-self: flex-end; border-top-right-radius: 2px; }
.msg .note { color: var(--muted); font-size: .8rem; }
.list-btn, .btn-row span {
  display: block; margin-top: 8px; padding: 6px; text-align: center; border-radius: 8px;
  color: #027eb5; font-weight: 650; background: rgb(255 255 255 / 55%);
}
.btn-row { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
@media (prefers-color-scheme: dark) {
  .list-btn, .btn-row span { color: #53bdeb; background: rgb(255 255 255 / 8%); }
}

.pos-card {
  position: absolute; left: 0; bottom: 8px; width: 220px; font-size: .85rem;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden; font-size: .9rem;
}
.pos-alert { background: #fff4d6; color: #6b4b00; padding: 10px 14px; }
.pos-body { padding: 10px 14px; display: grid; gap: 6px; }
.pos-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0 10px; }
.pos-row span { color: var(--muted); }
.pos-foot { background: var(--primary); color: var(--on-primary); text-align: center; font-weight: 700; padding: 9px; }

/* Franja */
.band { border-block: 1px solid var(--border); background: var(--bg-alt); }
.band-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; padding-block: 30px; }
.band-grid b { display: block; margin-bottom: 4px; }
.band-grid span { color: var(--muted); font-size: .95rem; }

/* Secciones */
.section { padding: 88px 0; }
.section.alt { background: var(--bg-alt); }
.section h2.center { max-width: 720px; margin-inline: auto; margin-bottom: 44px; }

.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; counter-reset: none; }
.steps li { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; }
.steps p { color: var(--muted); margin: 0; }
.step-n {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 12px; margin-bottom: 16px;
  background: var(--primary-soft); color: var(--primary); font-weight: 800; font-size: 1.1rem;
}

.features { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 18px; }
.feature { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.feature p { color: var(--muted); margin: 0; font-size: .95rem; }
.ic { font-size: 1.5rem; width: 46px; height: 46px; display: grid; place-items: center; border-radius: 12px; background: var(--primary-soft); margin-bottom: 14px; }

.compat { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.checks li {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 16px 14px 46px; position: relative;
}
.checks li::before {
  content: "✓"; position: absolute; left: 14px; top: 13px; width: 22px; height: 22px; border-radius: 50%;
  display: grid; place-items: center; background: var(--primary); color: var(--on-primary); font-size: .75rem; font-weight: 800;
}

.faq { display: grid; gap: 12px; }
.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 0 20px; }
.faq summary { cursor: pointer; font-weight: 650; padding: 18px 0; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--primary); font-size: 1.4rem; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--muted); padding-bottom: 18px; margin: 0; }

.cta-final { background: linear-gradient(135deg, #0a5c47, #0f7b5f 60%, #18a07c); color: #fff; }
.cta-final .lead { color: rgb(255 255 255 / 85%); }

.footer { border-top: 1px solid var(--border); padding: 32px 0; font-size: .92rem; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 16px 32px; align-items: center; justify-content: space-between; }
.footer nav { display: flex; gap: 20px; flex-wrap: wrap; }
.footer nav a { color: var(--muted); text-decoration: none; }
.footer nav a:hover { color: var(--text); }
.copy { color: var(--muted); margin: 0; width: 100%; font-size: .85rem; }

/* Tableta */
@media (max-width: 1080px) {
  .hero-grid, .compat { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { min-height: 0; display: flex; flex-direction: column; align-items: center; gap: 18px; }
  .phone { margin: 0 auto; }
  .pos-card { position: static; width: 300px; max-width: 100%; }
  .steps { grid-template-columns: 1fr; }
}

/* Celular */
@media (max-width: 760px) {
  .wrap { padding: 0 16px; }
  .topbar-inner { gap: 12px; }
  .hide-sm { display: none; }
  .topbar-actions .btn-primary { padding: .5em .9em; font-size: .85rem; }
  .menu-toggle {
    display: inline-flex; flex-direction: column; justify-content: center; gap: 4px;
    width: 40px; height: 40px; padding: 0 10px; border: 1px solid var(--border); border-radius: 10px;
    background: var(--surface); cursor: pointer;
  }
  .menu-toggle span { height: 2px; background: var(--text); border-radius: 2px; }
  .nav {
    display: none; position: absolute; top: 68px; left: 0; right: 0; margin: 0;
    flex-direction: column; gap: 0; padding: 8px 16px 16px;
    background: var(--bg); border-bottom: 1px solid var(--border); box-shadow: var(--shadow);
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 4px; border-bottom: 1px solid var(--border); }
  .nav .nav-login { display: inline-flex; margin-top: 12px; border-bottom: 1.5px solid var(--border); }
  .topbar-actions { margin-left: auto; }
  .brand span { font-size: .95rem; }
  .hero { padding: 40px 0 56px; }
  .band-grid { grid-template-columns: 1fr; gap: 16px; }
  .section { padding: 64px 0; }
  .hero-cta .btn { flex: 1 1 100%; }
}

@media (max-width: 400px) {
  .brand span { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
  .btn:hover { transform: none; }
}