/* =============================================================================
   Landing de early adopters — estética dark-crypto adelantada a la landing por
   decisión del operador (el restyle global del SPA sigue siendo el change
   restyle-dark-crypto). Tokens en :root: cambiar valores aquí re-tematiza todo
   sin tocar HTML ni selectores.
   Restricción inviolable: CERO recursos externos (CSP default-src 'self') —
   system font stack, SVG inline en el HTML, glows y retícula 100% CSS.
   ============================================================================= */

:root {
  /* Color */
  --color-bg: #0a0f1c;
  --color-surface: #111c2e;
  --color-glass: rgba(17, 28, 46, 0.55);
  --color-text: #f1f5f9;
  --color-text-muted: #cbd5e1;
  --color-accent: #4ade80;
  --color-accent-2: #38bdf8;
  --color-accent-micro: #facc15;
  --color-accent-contrast: #0a0f1c;
  --color-border: rgba(148, 163, 184, 0.12);
  --color-border-bright: rgba(74, 222, 128, 0.45);
  /* Borde SIEMPRE visible para controles de formulario sobre fondo dark
     (el token base es demasiado tenue para delimitar un input). */
  --color-border-input: rgba(148, 163, 184, 0.5);
  --color-error: #f87171;

  /* Fósforo del display countdown: verde fluorescente más brillante que el
     verde de marca, solo para los dígitos "encendidos" del módulo Nixie. */
  --display-phosphor: #39ff5e;

  /* Gradiente de marca */
  --grad-brand: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));

  /* Glow */
  --glow-green: rgba(74, 222, 128, 0.12);
  --glow-blue: rgba(56, 189, 248, 0.1);
  --shadow-glow: 0 0 40px rgba(74, 222, 128, 0.15);
  --shadow-card: 0 20px 60px rgba(0, 0, 0, 0.45);

  /* Tipografía */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --font-size-base: 1.0625rem;
  --font-size-small: 0.875rem;
  --font-size-h1: clamp(2.2rem, 5vw, 3.6rem);
  --font-size-h2: 1.75rem;
  --font-size-h3: 1.125rem;
  --line-height: 1.6;

  /* Espaciado y forma */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4.5rem;
  --radius: 18px;
  --radius-pill: 999px;
  --measure: 68rem;
  --measure-text: 42rem;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  overflow-x: hidden;
  position: relative;
}

/* Retícula sutil de líneas, casi imperceptible. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    repeating-linear-gradient(0deg, rgba(148, 163, 184, 0.04) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(90deg, rgba(148, 163, 184, 0.04) 0 1px, transparent 1px 72px);
}

/* --- Blobs de glow decorativos (divs aria-hidden, solo CSS) --- */

.bg-decor {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.glow {
  position: absolute;
  width: 38rem;
  height: 38rem;
  border-radius: 50%;
  filter: blur(120px);
}

.glow-green {
  top: -10rem;
  right: -8rem;
  background: radial-gradient(circle, var(--glow-green), transparent 70%);
}

.glow-blue {
  top: 24rem;
  left: -12rem;
  background: radial-gradient(circle, var(--glow-blue), transparent 70%);
}

.glow-green-2 {
  bottom: 6rem;
  right: -10rem;
  background: radial-gradient(circle, var(--glow-green), transparent 70%);
}

/* --- Base tipográfica --- */

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 var(--space-3) var(--space-5);
}

h1 {
  font-size: var(--font-size-h1);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin: 0 0 var(--space-2);
}

h2 {
  font-size: var(--font-size-h2);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-3);
}

h3 {
  font-size: var(--font-size-h3);
  margin: 0 0 var(--space-1);
}

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

code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: rgba(74, 222, 128, 0.08);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 0.1em 0.55em;
  white-space: nowrap;
  color: var(--color-accent);
}

.grad-text {
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.icon {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

/* --- Cabecera y pie --- */

.site-header {
  max-width: var(--measure);
  margin: 0 auto;
  padding: var(--space-3);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0;
  font-weight: 700;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.brand a {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: inherit;
  text-decoration: none;
}

.logo {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.logo-sm {
  width: 22px;
  height: 22px;
}

.site-footer {
  max-width: var(--measure);
  margin: 0 auto;
  padding: var(--space-3);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
}

.site-footer p {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin: 0;
}

/* --- Botones --- */

button,
.button {
  display: inline-block;
  background: var(--grad-brand);
  color: var(--color-accent-contrast);
  border: none;
  border-radius: var(--radius-pill);
  padding: 0.8rem 1.7rem;
  font-size: var(--font-size-base);
  font-weight: 700;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

button:hover,
.button:hover {
  box-shadow: 0 0 28px rgba(74, 222, 128, 0.35);
  transform: translateY(-1px);
}

.button.ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.button.ghost:hover {
  border-color: var(--color-border-bright);
  box-shadow: none;
}

button:disabled {
  opacity: 0.6;
  cursor: wait;
  box-shadow: none;
  transform: none;
}

button:focus-visible,
.button:focus-visible,
input:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* --- Hero a dos columnas --- */

.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-4);
  align-items: center;
  margin-top: var(--space-4);
  min-height: 60vh;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-glass);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 0.35rem 0.9rem;
  font-size: var(--font-size-small);
  font-weight: 600;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-3);
}

.badge-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.6); }
  50% { box-shadow: 0 0 0 6px rgba(74, 222, 128, 0); }
}

.hero-sub {
  color: var(--color-text-muted);
  font-size: 1.3rem;
  margin: 0 0 var(--space-3);
  max-width: 34rem;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
}

/* --- Tarjeta de secreto decorativa (aria-hidden, 100% HTML/CSS) --- */

.hero-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.secret-card {
  width: min(22rem, 100%);
  background: var(--color-glass);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  box-shadow: var(--shadow-card), var(--shadow-glow);
  animation: levitate 6s ease-in-out infinite alternate;
}

@keyframes levitate {
  from { transform: translateY(0); }
  to { transform: translateY(-12px); }
}

.secret-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.secret-head .icon {
  color: var(--color-accent);
}

.secret-chip {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-accent-micro);
  border: 1px solid rgba(250, 204, 21, 0.3);
  border-radius: var(--radius-pill);
  padding: 0.15rem 0.6rem;
}

.ciphertext {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--color-text-muted);
  background: rgba(10, 15, 28, 0.6);
  border: 1px solid var(--color-border);
  border-radius: calc(var(--radius) - 8px);
  padding: var(--space-2);
  margin: 0 0 var(--space-2);
  overflow: hidden;
}

.life-signal {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: var(--space-2);
}

.signal-label {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  white-space: nowrap;
}

.signal-bar {
  flex: 1;
  height: 0.45rem;
  border-radius: var(--radius-pill);
  background: rgba(148, 163, 184, 0.15);
  overflow: hidden;
}

.signal-fill {
  display: block;
  width: 72%;
  height: 100%;
  border-radius: inherit;
  background: var(--grad-brand);
  box-shadow: 0 0 12px rgba(74, 222, 128, 0.5);
}

.secret-foot {
  margin: 0;
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}

/* --- Display countdown estilo Nixie/VFD (decorativo, aria-hidden) ---
   Cada posición es una pila de los 10 dígitos superpuestos: el activo (.on)
   brilla en verde fosforescente; los inactivos quedan tenues detrás, cada
   uno a una profundidad distinta (opacity+blur+scale+translateZ con
   perspective) como las capas de un tubo de calculadora antigua. Las pilas
   las construye subscribe.js dentro de #nixie-display. */

.nixie {
  width: min(22rem, 100%);
  background: var(--color-glass);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
  box-shadow: var(--shadow-card);
}

.nixie-label {
  margin: 0 0 var(--space-1);
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  text-align: center;
}

.nixie-display {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.12em;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  /* Vidrio del display: casi negro con viñeta interior. */
  background: radial-gradient(ellipse at center, #0c1424 0%, #04070e 85%);
  border: 1px solid var(--color-border);
  border-radius: calc(var(--radius) - 8px);
  padding: 0.5rem 0.75rem;
}

.digit-group {
  display: inline-flex;
  gap: 0.1em;
}

.digit-stack {
  position: relative;
  display: inline-block;
  width: 1ch;
  height: 1.35em;
}

/* Los 10 dígitos de cada pila en el mismo plano. Inactivos: silueteados —
   solo contorno en verde muy tenue, interior transparente. El fallback para
   navegadores sin -webkit-text-stroke es opacidad muy baja. */
.digit-stack .d {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--display-phosphor);
  opacity: 0.07;
}

@supports (-webkit-text-stroke: 1px transparent) {
  .digit-stack .d {
    color: transparent;
    -webkit-text-stroke: 1px rgba(57, 255, 94, 0.16);
    opacity: 1;
  }
}

/* Dígito activo: fósforo encendido con glow intenso multicapa. */
.digit-stack .d.on {
  color: var(--display-phosphor);
  -webkit-text-stroke: 0;
  opacity: 1;
  z-index: 1;
  text-shadow:
    0 0 1px rgba(241, 245, 249, 0.55),
    0 0 4px rgba(57, 255, 94, 0.95),
    0 0 10px rgba(57, 255, 94, 0.8),
    0 0 22px rgba(57, 255, 94, 0.5),
    0 0 42px rgba(57, 255, 94, 0.28);
}

/* Separador: punto medio (·) centrado verticalmente por el align-items del
   display, más tenue que los dígitos, con parpadeo muy sutil. */
.nixie-sep {
  color: var(--display-phosphor);
  opacity: 0.4;
  text-shadow: 0 0 6px rgba(57, 255, 94, 0.4);
  animation: sep-blink 3s ease-in-out infinite;
}

@keyframes sep-blink {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.22; }
}

/* Leyenda de unidades bajo el display, alineada con los grupos (flex-grow
   proporcional al ancho de cada grupo: 2/1/2/2/2 dígitos). Tipografía: el
   estilo que tenía la etiqueta del módulo antes de escalarse. */
.nixie-units {
  display: flex;
  margin: 0.35rem 0 0;
  padding: 0 0.75rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.nixie-units span {
  flex: 2;
  text-align: center;
}

.nixie-units span:nth-child(2) {
  flex: 1;
}

/* --- Secciones --- */

section {
  margin-top: var(--space-5);
}

/* --- Cómo funciona: cards glass con numeración en gradiente --- */

.steps ol {
  list-style: none;
  counter-reset: paso;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
}

.steps li {
  counter-increment: paso;
  position: relative;
  background: var(--color-glass);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.steps li:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-bright);
}

.steps li::before {
  content: counter(paso, decimal-leading-zero);
  display: block;
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: var(--space-2);
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.step-icon {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 1.5rem;
  height: 1.5rem;
  color: var(--color-accent);
  opacity: 0.8;
}

.steps p {
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* --- Por qué confiar: lista con checks --- */

.trust ul {
  margin: 0;
  padding: 0;
  list-style: none;
  max-width: var(--measure-text);
}

.trust li {
  display: flex;
  gap: var(--space-2);
  align-items: flex-start;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.trust li:last-child {
  border-bottom: none;
}

.trust .check {
  color: var(--color-accent);
  margin-top: 0.2rem;
}

.trust strong {
  display: block;
  color: var(--color-text);
}

/* --- Form de captación: card glass destacada --- */

.signup {
  position: relative;
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
  background: var(--color-glass);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: var(--space-4) var(--space-3);
  box-shadow: var(--shadow-card), var(--shadow-glow);
  /* Borde con gradiente: doble background recortado a border-box. */
  background-image:
    linear-gradient(var(--color-surface), var(--color-surface)),
    var(--grad-brand);
  background-origin: border-box;
  background-clip: padding-box, border-box;
}

.signup form {
  margin-top: var(--space-3);
}

.signup label {
  display: block;
  margin-bottom: var(--space-1);
  font-weight: 600;
}

.signup input[type="email"] {
  width: 100%;
  padding: 0.9rem 1rem;
  border: 1px solid var(--color-border-input);
  border-radius: calc(var(--radius) - 6px);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--font-size-base);
  margin-bottom: var(--space-2);
  transition: border-color 0.2s ease;
}

.signup input[type="email"]:hover {
  border-color: rgba(148, 163, 184, 0.75);
}

.signup input[type="email"]:focus-visible {
  border-color: var(--color-accent);
}

.consent {
  display: flex;
  gap: var(--space-1);
  align-items: flex-start;
  margin: 0 0 var(--space-2);
}

.consent input {
  margin-top: 0.3rem;
  flex-shrink: 0;
  accent-color: var(--color-accent);
}

.consent label {
  font-weight: 400;
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
  margin: 0;
}

.form-status {
  min-height: 1.5em;
  margin: var(--space-2) 0 0;
  font-size: var(--font-size-small);
}

.form-status.error {
  color: var(--color-error);
}

.form-status.success {
  color: var(--color-accent);
  font-size: var(--font-size-base);
  font-weight: 600;
}

.microcopy {
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
  margin: var(--space-2) 0 0;
}

/* --- Páginas de texto (privacidad, confirmado) --- */

.prose {
  max-width: var(--measure-text);
}

.prose h1 {
  margin-top: var(--space-4);
}

.prose section {
  margin-top: var(--space-3);
}

.centered {
  text-align: center;
  padding-top: var(--space-5);
}

.confirm-card {
  background: var(--color-glass);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4) var(--space-3);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.confirm-check {
  width: 4.5rem;
  height: 4.5rem;
}

/* --- Accesibilidad: movimiento reducido --- */

@media (prefers-reduced-motion: reduce) {
  .secret-card {
    animation: none;
  }

  .badge-dot {
    animation: none;
  }

  .nixie-sep {
    animation: none;
  }

  button,
  .button,
  .steps li {
    transition: none;
  }
}

/* --- Responsive --- */

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
    gap: var(--space-3);
  }

  .steps ol {
    grid-template-columns: 1fr;
  }

  .nixie-display {
    font-size: 1.5rem;
  }
}

@media (max-width: 40rem) {
  :root {
    --space-5: 3rem;
  }

  main {
    padding: 0 var(--space-2) var(--space-5);
  }

  .signup {
    padding: var(--space-3) var(--space-2);
  }
}