/* NexaKeys — landing (/). Misma marca que el panel: crema, tinta, lima e IBM Plex. */

:root {
  color-scheme: light;
  --bg:        #f3f1ec;
  --surface:   #fbfaf7;
  --surface-2: #eeebe4;
  --line:      #dfdace;
  --line-2:    #cbc5b6;
  --ink:       #1b1a16;
  --ink-2:     #565248;
  --ink-3:     #6b675c;   /* textos chicos: contraste 5:1 sobre el fondo */

  --accent:      #4f7a12;
  --accent-ink:  #1b2a05;
  --accent-fill: #c8ec6a;
  --accent-soft: #e6f3c4;
  --ok: #2c7a46;   --ok-soft: #dcefe1;
  --warn: #9a5410; --warn-soft: #f6e5cf;
  --tag-ink: #6b4f00; --tag-bg: #f1ead0;

  /* Bloques oscuros (precio y llamado final) */
  --inv-bg:   #1b1a16;
  --inv-ink:  #f3f1ec;
  --inv-ink-2:#b0aea3;
  --inv-line: #3b3a33;

  --shadow: 0 1px 0 rgba(27,26,22,.04), 0 24px 48px -24px rgba(27,26,22,.28);
  --sans: 'IBM Plex Sans', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --nav-bg: rgba(243,241,236,.92);
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg:        #11110f;
    --surface:   #191916;
    --surface-2: #21201c;
    --line:      #2c2b26;
    --line-2:    #3b3a33;
    --ink:       #edece6;
    --ink-2:     #b0aea3;
    --ink-3:     #9a978c;
    --accent:      #b9e05a;
    --accent-ink:  #172204;
    --accent-fill: #b9e05a;
    --accent-soft: #283415;
    --ok: #62c283;   --ok-soft: #16301f;
    --warn: #f0a050; --warn-soft: #3a2914;
    --tag-ink: #dcc054; --tag-bg: #34301a;
    --inv-bg:   #1f1e1a;
    --inv-ink:  #edece6;
    --inv-ink-2:#b0aea3;
    --inv-line: #3b3a33;
    --shadow: 0 1px 0 rgba(0,0,0,.3), 0 24px 48px -24px rgba(0,0,0,.7);
    --nav-bg: rgba(17,17,15,.9);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.5; -webkit-font-smoothing: antialiased; }
h1, h2, h3, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; }
img { display: block; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.i { width: 16px; height: 16px; flex: none; }
[hidden] { display: none !important; }

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 48px; }
.wrap.narrow { max-width: 820px; }
.skip { position: absolute; left: -999px; top: 8px; z-index: 20; background: var(--surface); padding: 8px 12px; border-radius: 6px; }
.skip:focus { left: 8px; }

/* Botones */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 40px; padding: 0 16px; border-radius: 6px; border: 1px solid transparent;
  font-size: 14px; font-weight: 500; text-decoration: none; white-space: nowrap;
  transition: background .15s, border-color .15s, color .15s;
}
.btn-lg { height: 48px; padding: 0 22px; font-size: 15px; border-radius: 8px; }
.btn-primary { background: var(--accent-fill); color: var(--accent-ink); font-weight: 600; }
.btn-primary:hover { filter: brightness(.95); }
.btn-ghost:hover { background: var(--surface-2); }
.btn-outline { background: var(--surface); border-color: var(--line-2); }
.btn-outline:hover { border-color: var(--ink-3); }
.btn-dark { color: var(--inv-ink); border-color: var(--inv-line); }
.btn-dark:hover { border-color: var(--inv-ink-2); }

/* Barra superior */
.nav { position: sticky; top: 0; z-index: 10; background: var(--nav-bg); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav-in { height: 68px; display: flex; align-items: center; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-name { display: flex; flex-direction: column; font-weight: 600; font-size: 16px; line-height: 1; }
.brand-name small { font-family: var(--mono); font-size: 10px; font-weight: 400; letter-spacing: .16em; color: var(--ink-3); margin-top: 3px; }
.nav-links { display: flex; gap: 28px; margin-left: 24px; font-size: 14px; }
.nav-links a { color: var(--ink-2); text-decoration: none; }
.nav-links a:hover { color: var(--ink); }
.nav-cta { margin-left: auto; display: flex; gap: 8px; }

/* Portada */
.hero { padding: 88px 0 72px; }
.hero-in { display: flex; flex-wrap: wrap; gap: 56px; align-items: center; }
.hero-copy { flex: 1 1 460px; min-width: 0; }
.pill {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 10px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent);
  font-family: var(--mono); font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
}
.pill .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
h1 { font-size: clamp(38px, 5.2vw, 60px); line-height: 1.04; letter-spacing: -.03em; font-weight: 600; margin: 22px 0 20px; }
h1 mark { background: linear-gradient(transparent 62%, var(--accent-fill) 62%); color: inherit; }
@media (prefers-color-scheme: dark) { h1 mark { background: none; color: var(--accent); } }
.lead { font-size: 18px; line-height: 1.55; color: var(--ink-2); max-width: 520px; }
.lead.sm { font-size: 16px; line-height: 1.6; max-width: 460px; margin-bottom: 28px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.ticks { display: flex; flex-wrap: wrap; gap: 12px 20px; margin-top: 28px; font-size: 13px; color: var(--ink-3); }
.ticks li { display: inline-flex; align-items: center; gap: 6px; }
.ticks .i { width: 15px; height: 15px; color: var(--accent); }

/* Tarjeta de ejemplo */
.demo { flex: 1 1 400px; min-width: 0; max-width: 480px; margin: 0 auto; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); overflow: hidden; }
.demo-head { display: flex; align-items: center; gap: 10px; padding: 14px 18px; background: var(--surface-2); border-bottom: 1px solid var(--line); }
.demo-head .label { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-2); }
.demo-head .tag { margin-left: auto; font-family: var(--mono); font-size: 11px; color: var(--tag-ink); background: var(--tag-bg); padding: 3px 8px; border-radius: 999px; }
.demo-title { padding: 18px 18px 6px; display: flex; flex-direction: column; gap: 4px; }
.demo-title strong { font-size: 17px; font-weight: 600; }
.demo-title span { font-size: 13.5px; color: var(--ink-2); }
.checks { padding: 8px 18px 14px; }
.checks li { display: flex; gap: 12px; align-items: flex-start; padding: 12px 0; border-bottom: 1px solid var(--line); }
.checks li:last-child { border-bottom: 0; }
.checks b { display: block; font-size: 14.5px; font-weight: 500; }
.checks span:not(.mark) { display: block; font-size: 13px; color: var(--ink-3); margin-top: 2px; }
.mark { width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex: none; }
.mark .i { width: 13px; height: 13px; }
.mark.ok { background: var(--ok-soft); color: var(--ok); }
.mark.warn { background: var(--warn-soft); color: var(--warn); font-weight: 700; font-size: 13px; }

/* Secciones */
.sec { padding: 88px 0; }
.sec.tight { padding: 0 0 88px; }
#cuando { padding-top: 0; }
.band { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); }
.eyebrow.muted { color: var(--ink-3); font-size: 11px; margin-bottom: 12px; }
.center { text-align: center; }
h2 { font-size: clamp(28px, 3.4vw, 40px); line-height: 1.15; letter-spacing: -.02em; font-weight: 600; margin: 10px 0 36px; max-width: 700px; }
h2.center { margin-left: auto; margin-right: auto; }
.h-md { font-size: clamp(24px, 2.6vw, 30px); margin: 16px 0 12px; }
h3 { font-size: 18px; font-weight: 600; margin: 14px 0 6px; }
.fine { font-size: 13px; color: var(--ink-3); margin-top: 20px; }
.ico { width: 28px; height: 28px; fill: none; stroke: var(--accent); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.ico.lg { width: 36px; height: 36px; }

.cases { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr)); gap: 16px; }
.case { padding: 24px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.case p, .steps p { font-size: 14.5px; line-height: 1.55; color: var(--ink-2); }

.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); gap: 20px; }
.steps li { padding: 28px; border: 1px solid var(--line); border-radius: 12px; background: var(--bg); }
.steps .num { font-family: var(--mono); font-size: 36px; font-weight: 500; letter-spacing: -.02em; color: var(--accent); }
.steps h3 { font-size: 19px; margin-top: 18px; }
.steps p { font-size: 15px; }

/* Precios */
.split { display: flex; flex-wrap: wrap; gap: 48px; align-items: flex-start; }
.split-copy { flex: 1 1 380px; min-width: 0; }
.split-copy h2 { margin-bottom: 16px; }
.price { display: inline-flex; flex-direction: column; gap: 4px; padding: 20px 24px; border-radius: 12px; background: var(--inv-bg); color: var(--inv-ink); }
.price .label { font-family: var(--mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--inv-ink-2); }
.price .amount { font-family: var(--mono); font-size: 34px; font-weight: 500; letter-spacing: -.02em; color: var(--accent-fill); }
.price .note { font-size: 13px; color: var(--inv-ink-2); }
.list { flex: 1 1 420px; min-width: 0; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); overflow: hidden; }
.list-head { padding: 12px 18px; background: var(--surface-2); font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-2); }
.list li { display: flex; align-items: center; gap: 12px; padding: 13px 18px; border-top: 1px solid var(--line); font-size: 14.5px; }
.list li .i { color: var(--accent); }
.list-foot { display: flex; align-items: center; gap: 6px; padding: 13px 18px; border-top: 1px solid var(--line); font-size: 14px; font-weight: 500; color: var(--accent); text-decoration: none; }
.list-foot:hover { background: var(--surface-2); }
.list-foot .i { width: 14px; height: 14px; }

/* Fuentes conectadas */
.sources { padding: 40px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); }
.sources-head { display: flex; flex-wrap: wrap; gap: 12px 40px; align-items: flex-end; justify-content: space-between; margin-bottom: 28px; }
.sources-head .h-md { margin: 10px 0 0; }
.sources-sub { flex: 0 1 380px; font-size: 15px; line-height: 1.55; color: var(--ink-2); }
.source-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 190px), 1fr)); gap: 10px; }
.source-grid li { display: flex; flex-direction: column; gap: 3px; padding: 16px 18px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); }
.source-grid b { font-family: var(--mono); font-size: 15px; font-weight: 600; letter-spacing: .02em; }
.source-grid span { font-size: 13px; color: var(--ink-3); }
.sources .fine { margin-top: 18px; }

/* Privacidad y seguridad */
.safe-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); gap: 16px; }
.safe { padding: 24px; border: 1px solid var(--line); border-radius: 12px; background: var(--bg); }
.safe p { font-size: 14.5px; line-height: 1.55; color: var(--ink-2); }
.sec.trust-sec { padding-top: 88px; }

/* Uso responsable */
.trust { display: flex; flex-wrap: wrap; gap: 40px; padding: 44px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); }
.trust-copy { flex: 1 1 340px; min-width: 0; }
.trust-copy p { font-size: 15px; line-height: 1.6; color: var(--ink-2); }
.trust-uses { flex: 1 1 420px; min-width: 0; }
.link { display: inline-block; margin-top: 16px; font-size: 14px; font-weight: 500; color: var(--accent); }
.uses { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: 10px; }
.uses li { padding: 14px 16px; border-radius: 8px; background: var(--bg); font-size: 14.5px; }

/* Preguntas */
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { display: flex; align-items: center; gap: 16px; padding: 22px 4px; font-size: 17px; font-weight: 500; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--accent); }
.faq p { padding: 0 4px 22px; font-size: 15px; line-height: 1.6; color: var(--ink-2); }
.plus { margin-left: auto; position: relative; width: 14px; height: 14px; flex: none; transition: transform .15s; }
.plus::before, .plus::after { content: ""; position: absolute; left: 0; top: 6px; width: 14px; height: 1.8px; border-radius: 1px; background: var(--accent); }
.plus::after { transform: rotate(90deg); }
.faq details[open] .plus { transform: rotate(45deg); }

/* Llamado final */
.cta { display: flex; flex-wrap: wrap; gap: 32px; align-items: center; padding: 64px 48px; border-radius: 20px; background: var(--inv-bg); color: var(--inv-ink); }
.cta > div:first-child { flex: 1 1 420px; min-width: 0; }
.cta h2 { font-size: clamp(30px, 3.8vw, 44px); line-height: 1.08; margin: 0 0 12px; }
.cta p { font-size: 16px; color: var(--inv-ink-2); }
.cta .actions { margin-top: 0; }
@media (prefers-color-scheme: dark) { .cta, .price { border: 1px solid var(--line); } }

/* Pie */
.foot { border-top: 1px solid var(--line); padding: 28px 0 40px; }
.foot-in { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 28px; font-size: 13px; color: var(--ink-3); }
.foot-in strong { color: var(--ink); }
.foot-links { margin-left: auto; display: flex; flex-wrap: wrap; gap: 20px; }
.foot-links a { color: var(--ink-2); }

/* Celular */
@media (max-width: 860px) {
  .nav-links { display: none; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 20px; }
  .nav-in { gap: 12px; }
  .nav-cta .btn { padding: 0 12px; }
  .hero { padding: 48px 0 56px; }
  .hero-in { gap: 40px; }
  .lead { font-size: 17px; }
  .actions .btn-lg { flex: 1 1 100%; }
  .sec { padding: 64px 0; }
  .sec.tight { padding-bottom: 64px; }
  .trust, .sources { padding: 28px 20px; }
  .sec.trust-sec { padding-top: 64px; }
  .source-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .source-grid li { padding: 12px 14px; }
  .source-grid b { font-size: 14px; }
  .cta { padding: 40px 24px; }
  .foot-links { margin-left: 0; }
}
@media (max-width: 380px) {
  .brand-name small { display: none; }
}