:root {
  --bg: #0f1115;
  --bg-alt: #13161c;
  --panel: #171a21;
  --panel-2: #1f232c;
  --line: #2a2f3a;
  --text: #e8eaf0;
  --muted: #a3aabb;
  --accent: #3b82f6;
  --accent-hi: #5b9bff;
  --ok: #22c55e;
  --radius: 14px;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-hi); }
a:hover { color: #fff; }
:focus-visible { outline: 3px solid var(--accent-hi); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 4.6vw, 3.2rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; }
h3 { font-size: 1.1rem; font-weight: 650; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
code { font: 13px/1.5 ui-monospace, "Cascadia Mono", Consolas, monospace; background: var(--panel-2); padding: 2px 6px; border-radius: 6px; word-break: break-all; }

.wrap { width: min(1120px, 100% - 32px); margin-inline: auto; }
.narrow { width: min(820px, 100% - 32px); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--accent); color: #fff; padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }
.fine { font-size: .85rem; color: var(--muted); }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  background: var(--accent); color: #fff; text-decoration: none; font-weight: 650;
  padding: 10px 18px; border-radius: 10px; border: 1px solid transparent;
  transition: background .15s, transform .15s;
}
.btn:hover { background: var(--accent-hi); color: #fff; transform: translateY(-1px); }
.btn-sm { padding: 6px 14px; font-size: .92rem; }
.btn-lg { padding: 14px 24px; font-size: 1.05rem; }
.btn-block { display: flex; width: 100%; }
.btn-ghost { background: transparent; border-color: var(--line); color: var(--text); }
.btn-ghost:hover { background: var(--panel-2); border-color: var(--muted); }

/* ---------- Cabecera ---------- */
.top { position: sticky; top: 0; z-index: 50; background: rgba(15, 17, 21, .88); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top-in { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 800; font-size: 1.15rem; }
.top nav { display: flex; align-items: center; gap: 4px 20px; flex-wrap: wrap; }
.top nav a:not(.btn) { color: var(--muted); text-decoration: none; font-size: .95rem; }
.top nav a:not(.btn):hover { color: #fff; }

/* ---------- Hero ---------- */
.hero { padding: 56px 0 40px; background: radial-gradient(900px 400px at 75% -10%, rgba(59, 130, 246, .18), transparent 70%); }
.hero-in { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 48px; align-items: center; }
.eyebrow { color: var(--accent-hi); font-weight: 700; letter-spacing: .08em; text-transform: uppercase; font-size: .8rem; margin-bottom: 14px; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 34em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0 14px; }

.shot { margin: 0; }
.shot figcaption { color: var(--muted); font-size: .85rem; margin-top: 10px; text-align: center; }
.frame { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--panel); box-shadow: 0 30px 60px -20px rgba(0, 0, 0, .7); }
.frame-bar { display: flex; align-items: center; gap: 6px; padding: 9px 12px; background: var(--panel-2); border-bottom: 1px solid var(--line); font-size: .78rem; color: var(--muted); }
.frame-bar i { width: 10px; height: 10px; border-radius: 50%; background: #3a4050; }
.frame-bar span { margin-left: 8px; }

/* ---------- Franja de datos ---------- */
.strip { border-block: 1px solid var(--line); background: var(--bg-alt); }
.strip-in { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; padding-block: 22px; }
.strip-in li { text-align: center; }
.strip-in b { display: block; font-size: 1.25rem; }
.strip-in span { color: var(--muted); font-size: .9rem; }

/* ---------- Secciones ---------- */
.sec { padding: 72px 0; }
.sec.alt { background: var(--bg-alt); border-block: 1px solid var(--line); }
.sec-lead { color: var(--muted); max-width: 40em; margin-bottom: 32px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.card h3 { margin-bottom: 8px; }
.card p { margin: 0; color: var(--muted); font-size: .96rem; }
.card:hover { border-color: #3a4560; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.checks li { position: relative; padding-left: 28px; margin-bottom: 10px; color: var(--muted); }
.checks li::before { content: ""; position: absolute; left: 0; top: .42em; width: 16px; height: 16px; border-radius: 50%; background: var(--ok) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='none' stroke='%230f1115' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round' d='M4 8.4l2.6 2.6L12 5.6'/%3E%3C/svg%3E") center/contain no-repeat; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: paso; margin-top: 28px; }
.steps li { counter-increment: paso; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.steps li::before { content: counter(paso); display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--accent); font-weight: 800; margin-bottom: 14px; }
.steps p { margin: 0; color: var(--muted); }

/* ---------- Planes ---------- */
.plans { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin-top: 28px; align-items: stretch; }
.plan { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; display: flex; flex-direction: column; }
.plan-main { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), 0 20px 50px -25px rgba(59, 130, 246, .6); }
.plan .price { font-size: 2rem; font-weight: 800; margin-bottom: 14px; }
.plan .checks { flex: 1; margin-bottom: 20px; }
.plan .fine { margin: 14px 0 0; }
.hash { margin-top: 14px; font-size: .88rem; color: var(--muted); }
.hash summary { cursor: pointer; }
.hash code { display: block; margin: 10px 0; }

/* ---------- FAQ ---------- */
.qa { border-bottom: 1px solid var(--line); }
.qa summary { cursor: pointer; padding: 18px 0; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary h3 { margin: 0; font-size: 1.05rem; }
.qa summary::after { content: "+"; font-size: 1.5rem; color: var(--accent-hi); line-height: 1; flex: none; }
.qa[open] summary::after { content: "−"; }
.qa p { color: var(--muted); padding-bottom: 18px; margin: 0; }

/* ---------- Cierre y pie ---------- */
.final { padding: 72px 0; background: linear-gradient(135deg, #16244a, #0f1115 70%); border-top: 1px solid var(--line); }
.final-in { text-align: center; }
.final-in p { color: var(--muted); margin-bottom: 24px; }
.foot { padding: 32px 0; border-top: 1px solid var(--line); background: var(--bg-alt); }
.foot p { margin: 0 0 6px; color: var(--muted); font-size: .92rem; }

/* ---------- Adaptación a pantallas pequeñas ---------- */
@media (max-width: 900px) {
  .hero-in, .split { grid-template-columns: 1fr; gap: 32px; }
  .grid, .steps { grid-template-columns: 1fr 1fr; }
  .plans { grid-template-columns: 1fr; }
  .sec { padding: 52px 0; }
}
@media (max-width: 600px) {
  .grid, .steps { grid-template-columns: 1fr; }
  .strip-in { grid-template-columns: 1fr 1fr; }
  .top nav a:not(.btn) { display: none; }
  .hero { padding-top: 36px; }
  .cta .btn { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}