/* SubsTrackerPro — landing «la landing es un recibo»
   Sistema: brand book de contenido v1.0 (docs/marketing/BRAND_BOOK_CONTENIDO.md)
   Registros: R2 cartel (héroe, cierre) · R1 documento (recibo, confianza, precios) · R4 solo
   donde aparece la UI real. Regla del tope: sin degradados decorativos, sin vidrio, sin glow
   fuera de la zona R4. Asimetría y alineación izquierda como norma. */

:root {
  --violet: #6D51FA;
  --teal: #11D4AC;
  --ink: #16131F;
  --paper: #ECE7DA;      /* recibo R1 */
  --warm: #F4F3F0;       /* fondo de página */
  --paper-legal: #FBFAF7;
  --muted: #5B5668;      /* AA 6.4:1 sobre --warm */
  --hero-sub: #FFFFFF;
  --maxw: 1120px;
  --radius-r1: 10px;     /* radios contenidos: 16/12/10 solo en zona producto */
}

* { margin: 0; padding: 0; box-sizing: border-box; }

@font-face {
  font-family: 'Space Grotesk';
  /* format('truetype') a secas: Safari no reconoce 'truetype-variations' y
     descartaría la fuente entera; con la forma simple todos los navegadores
     modernos cargan la variable y sus pesos 300-700. */
  src: url('fonts/SpaceGrotesk-var.ttf') format('truetype');
  font-weight: 300 700;
  font-display: swap;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('fonts/JetBrainsMono-Regular.woff2') format('woff2');
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('fonts/JetBrainsMono-Medium.woff2') format('woff2');
  font-weight: 500;
  font-display: swap;
}

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  font-family: 'Space Grotesk', -apple-system, 'Segoe UI', sans-serif;
  background: var(--warm);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: tabular-nums;
}

.mono { font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace; }

a { color: var(--violet); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--ink); }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--ink); color: #fff; padding: 10px 16px; font-size: 14px;
}
.skip-link:focus { left: 12px; top: 12px; }

:focus-visible { outline: 3px solid var(--violet); outline-offset: 2px; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- header ---------- */
header.site {
  display: flex; align-items: center; gap: 12px;
  position: sticky; top: 0; z-index: 60;
  background: var(--warm);
  border-bottom: 1.5px solid transparent;
  padding: var(--hpad, 18px) var(--hpadx, 24px);
  max-width: none; margin: 0;
  transition: padding .28s ease, border-color .28s ease;
}
header.site > .head-inner {
  display: flex; align-items: center; gap: 12px;
  max-width: var(--maxw); margin: 0 auto; width: 100%;
}
header.site.scrolled { --hpad: 9px; border-bottom-color: rgba(22,19,31,.14); }
header.site .brand img { transition: width .28s ease, height .28s ease; }
header.site.scrolled .brand img { width: 26px; height: 26px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand img { width: 34px; height: 34px; display: block; }
.brand strong {
  font-weight: 700; letter-spacing: -0.02em; font-size: 19px; white-space: nowrap;
}
nav.main { margin-left: auto; display: flex; align-items: center; gap: 18px; }
nav.main a { font-size: 15px; color: var(--ink); text-decoration: none; }
nav.main a:hover { text-decoration: underline; text-underline-offset: 3px; }

.btn {
  display: inline-block; border: 0; cursor: pointer; text-decoration: none;
  font-family: inherit; font-weight: 700; letter-spacing: -0.01em;
  border-radius: 8px; padding: 13px 22px; font-size: 16px; line-height: 1.2;
}
.btn-violet { background: var(--violet); color: #fff; }
.btn-violet:hover { background: #5b40e8; color: #fff; }
.btn-white { background: #fff; color: var(--ink); }
.btn-white:hover { background: var(--paper); color: var(--ink); }
.btn-ghost {
  background: transparent; color: #fff; border: 2px solid rgba(255,255,255,.55);
}
.btn-ghost:hover { border-color: #fff; color: #fff; }
.btn-sm { padding: 9px 16px; font-size: 14px; }

/* ---------- números de serie de sección (recurso cartel) ---------- */
.serial {
  font-family: 'JetBrains Mono', monospace; font-size: 12px; letter-spacing: .12em;
  color: var(--muted); text-transform: uppercase;
}
.section-head { display: flex; align-items: baseline; gap: 16px; margin-bottom: 8px; }
.section-head h2 {
  font-size: clamp(26px, 4vw, 38px); font-weight: 700; letter-spacing: -0.03em; line-height: 1.15;
}
.section-sub { color: var(--muted); font-size: 17px; max-width: 56ch; }

section { padding: 72px 0; }

/* aparición al hacer scroll (sutil; se anula con reduced-motion) */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity .45s ease, transform .45s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- S1 héroe — R2 cartel + zona R4 ---------- */
.hero { padding: 0; }
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  max-width: 1280px; margin: 0 auto; align-items: stretch;
}
.hero-panel {
  background: var(--violet); color: #fff;
  padding: clamp(48px, 7vw, 96px) clamp(28px, 5vw, 72px) clamp(48px, 7vw, 88px) max(24px, calc((100vw - 1280px)/2 + 24px));
}
.hero-eyebrow {
  font-family: 'JetBrains Mono', monospace; font-size: 13px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: #fff; opacity: .95;
}
.hero h1 {
  margin-top: 22px;
  font-size: clamp(38px, 5.6vw, 74px);
  font-weight: 700; letter-spacing: -0.045em; line-height: 1.02; color: #fff;
}
.hero h1 .fig { font-family: 'JetBrains Mono', monospace; font-weight: 500; letter-spacing: -0.02em; }
.hero h1 .real {
  box-shadow: inset 0 -0.16em 0 0 var(--teal); /* subrayado teal macizo, recurso R2 */
}
.hero-source {
  margin-top: 14px; font-family: 'JetBrains Mono', monospace;
  font-size: 12px; letter-spacing: .06em; color: #fff; opacity: .82;
}
.hero-sub { margin-top: 22px; font-size: 19px; max-width: 46ch; color: var(--hero-sub); }
.hero-ctas { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.hero-micro {
  margin-top: 18px; font-family: 'JetBrains Mono', monospace; font-size: 12px;
  letter-spacing: .12em; text-transform: uppercase; color: #fff; opacity: .92;
}
.hero-serial { margin-top: 44px; color: #fff; opacity: .6; }

.hero-visual {
  display: flex; align-items: center; justify-content: center;
  padding: clamp(40px, 6vw, 72px) 24px;
}
/* zona R4: aquí y solo aquí, la app real con su sombra/resplandor */
.phone {
  width: min(300px, 78%);
  border-radius: 46px; border: 9px solid var(--ink);
  overflow: hidden; will-change: transform;
  transform: rotate(-2deg) translate3d(0, var(--py, 0px), 0);
  box-shadow: 0 26px 60px rgba(22,19,31,.28), 0 0 90px rgba(109,81,250,.22);
  background: var(--ink);
}
.phone img { width: 100%; height: auto; display: block; }

/* ---------- S2 recibo interactivo — R1 documento ---------- */
.receipt-zone { background: var(--warm); }
.receipt-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 64px); align-items: start; margin-top: 40px;
}
.chips-title {
  font-family: 'JetBrains Mono', monospace; font-size: 13px; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase; margin-bottom: 14px;
}
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  font-family: 'JetBrains Mono', monospace; font-size: 13.5px; cursor: pointer;
  border: 1.5px solid var(--ink); background: transparent; color: var(--ink);
  border-radius: 999px; padding: 9px 15px; line-height: 1;
}
.chip[aria-pressed="true"] { background: var(--violet); border-color: var(--violet); color: #fff; }
.chip:hover { border-color: var(--violet); }
.chips-note { margin-top: 16px; font-size: 13.5px; color: var(--muted); max-width: 40ch; }

.receipt {
  position: relative;
  overflow: hidden; /* el sello escala al golpear; nada debe ensanchar la página */
  background: var(--paper); color: var(--ink);
  padding: 34px 30px 44px;
  font-family: 'JetBrains Mono', monospace;
  box-shadow: 0 2px 0 rgba(22,19,31,.08);
  /* grano de impresión sutil (R1) */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='1'/%3E%3CfeColorMatrix values='0 0 0 0 0.08 0 0 0 0 0.07 0 0 0 0 0.12 0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)'/%3E%3C/svg%3E");
}
/* borde perforado arriba y abajo (R1) */
.receipt::before, .receipt::after {
  content: ""; position: absolute; left: 0; right: 0; height: 14px;
  background-image: radial-gradient(circle at 8px 7px, var(--warm) 6px, transparent 6.5px);
  background-size: 22px 14px; background-repeat: repeat-x;
}
.receipt::before { top: -1px; }
.receipt::after { bottom: -1px; transform: scaleY(-1); }

.receipt-head {
  display: flex; justify-content: space-between; gap: 12px;
  font-size: 12px; letter-spacing: .14em; text-transform: uppercase;
  padding-bottom: 14px; border-bottom: 1.5px dashed rgba(22,19,31,.4);
}
.receipt-lines { list-style: none; margin: 8px 0 0; min-height: 120px; }
.receipt-lines li {
  display: flex; align-items: baseline; gap: 10px;
  font-size: 14.5px; padding: 7px 0;
}
.receipt-lines li .dots {
  flex: 1; border-bottom: 1.5px dotted rgba(22,19,31,.45); transform: translateY(-4px);
}
.receipt-lines li .amt { font-weight: 500; }
.receipt-lines li.printing { animation: printline .28s ease-out both; }
@keyframes printline {
  from { opacity: 0; transform: translateY(-6px); clip-path: inset(0 0 100% 0); }
  to   { opacity: 1; transform: none; clip-path: inset(0 0 0% 0); }
}
.receipt-empty { color: rgba(22,19,31,.5); font-size: 13.5px; padding: 18px 0; }

.receipt-total {
  display: flex; align-items: baseline; gap: 10px;
  border-top: 3px solid var(--ink); margin-top: 14px; padding-top: 12px;
  font-size: 15px; letter-spacing: .04em;
}
.receipt-total .dots { flex: 1; }
.receipt-total .amt { font-size: 26px; font-weight: 500; }
.receipt-total .per { font-size: 13px; color: rgba(22,19,31,.6); }
.receipt-year {
  margin-top: 6px; font-size: 12.5px; color: rgba(22,19,31,.62);
  display: flex; justify-content: flex-end; gap: 8px;
}

.stamp {
  position: absolute; right: 18px; top: 44%;
  transform: rotate(-8deg) scale(1);
  font-family: 'JetBrains Mono', monospace; font-weight: 500;
  font-size: 20px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--violet); border: 3px solid var(--violet); border-radius: 6px;
  padding: 8px 14px; mix-blend-mode: multiply; opacity: 0; pointer-events: none;
}
.stamp.on { opacity: .92; animation: slam .32s cubic-bezier(.2,1.4,.4,1) both; }
@keyframes slam {
  from { opacity: 0; transform: rotate(-8deg) scale(1.7); }
  to   { opacity: .92; transform: rotate(-8deg) scale(1); }
}

.receipt-cta { margin-top: 28px; }
.receipt-cta .lead { font-weight: 700; font-size: 18px; letter-spacing: -0.02em; margin-bottom: 14px; }
.receipt-privacy {
  margin-top: 14px; font-family: 'JetBrains Mono', monospace; font-size: 12px;
  letter-spacing: .06em; color: var(--muted);
}

/* ---------- S3 confianza — R1 libro contable ---------- */
.ledger { margin-top: 40px; border-top: 3px solid var(--ink); max-width: 760px; }
.ledger-row {
  display: flex; align-items: center; gap: 14px;
  padding: 20px 4px; border-bottom: 1.5px dashed rgba(22,19,31,.35);
}
.ledger-row .item { font-size: clamp(18px, 2.6vw, 24px); font-weight: 700; letter-spacing: -0.02em; }
.ledger-row > svg { width: 26px; height: 26px; stroke: var(--ink); fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.ledger-row .dots { flex: 1; border-bottom: 1.5px dotted rgba(22,19,31,.45); transform: translateY(6px); }
.ledger-stamp {
  font-family: 'JetBrains Mono', monospace; font-weight: 500; font-size: 15px;
  letter-spacing: .12em; color: var(--violet); border: 2.5px solid var(--violet);
  border-radius: 6px; padding: 5px 12px; transform: rotate(-4deg); white-space: nowrap;
}
.trust-context { margin-top: 26px; font-size: 17px; color: var(--ink); max-width: 58ch; }
.trust-links { margin-top: 12px; font-size: 15px; }

/* ---------- producto a fondo — bloques alternados, R4 solo en la captura ---------- */
.showcase { margin-top: 24px; }
.show-block {
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: clamp(24px, 5vw, 72px); align-items: center;
  padding: 44px 0; border-bottom: 1.5px dashed rgba(22,19,31,.25);
}
.show-block:last-child { border-bottom: 0; }
.show-block:nth-child(even) .show-copy { order: 2; }
.show-block:nth-child(even) .show-visual { order: 1; }
.show-kicker {
  display: flex; align-items: center; gap: 8px;
  font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: var(--violet);
}
.show-kicker svg { width: 18px; height: 18px; stroke: var(--violet); fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.show-copy h3 {
  margin-top: 10px; font-size: clamp(22px, 3vw, 30px);
  font-weight: 700; letter-spacing: -0.03em; line-height: 1.15;
}
.show-copy p { margin-top: 10px; font-size: 16.5px; color: var(--muted); max-width: 46ch; }
.show-copy .fine {
  margin-top: 10px; font-family: 'JetBrains Mono', monospace; font-size: 12px;
  letter-spacing: .06em; color: var(--muted);
}
.show-visual { display: flex; justify-content: center; }
.phone-sm {
  width: min(250px, 82%);
  border-radius: 38px; border: 8px solid var(--ink);
  overflow: hidden; background: var(--ink);
  box-shadow: 0 18px 44px rgba(22,19,31,.22), 0 0 60px rgba(109,81,250,.16);
}
.phone-sm { will-change: transform; transform: rotate(var(--rot, 0deg)) translate3d(0, var(--py, 0px), 0); }
.show-block:nth-child(odd) .phone-sm { --rot: 1.5deg; }
.show-block:nth-child(even) .phone-sm { --rot: -1.5deg; }
.phone-sm img { width: 100%; height: auto; display: block; }

/* ---------- multi-dispositivo ---------- */
.devices-grid {
  display: grid; grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 18px; margin-top: 40px;
}
.device {
  border-top: 3px solid var(--ink); padding: 18px 4px 6px;
}
.device svg { width: 38px; height: 38px; stroke: var(--ink); fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.device h3 { margin-top: 12px; font-size: 17px; font-weight: 700; letter-spacing: -0.02em; }
.device p { margin-top: 6px; font-size: 14.5px; color: var(--muted); }
.devices-note {
  margin-top: 28px; font-family: 'JetBrains Mono', monospace; font-size: 12.5px;
  letter-spacing: .06em; color: var(--muted); max-width: 72ch;
}

/* ---------- inventario «y además» — recibo de funciones, R1 ---------- */
.also-list { margin-top: 36px; max-width: 820px; border-top: 3px solid var(--ink); }
.also-row {
  display: flex; align-items: baseline; gap: 12px;
  padding: 13px 4px; border-bottom: 1.5px dashed rgba(22,19,31,.28);
  font-size: 16px;
}
.also-row .que { font-weight: 700; letter-spacing: -0.015em; white-space: nowrap; }
.also-row > svg { width: 19px; height: 19px; stroke: var(--violet); fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; align-self: center; }
.also-row .como { color: var(--muted); font-size: 14.5px; }
.also-row .dots { flex: 1; border-bottom: 1.5px dotted rgba(22,19,31,.45); transform: translateY(-4px); min-width: 24px; }
.also-row .si {
  font-family: 'JetBrains Mono', monospace; font-weight: 500; font-size: 13px;
  letter-spacing: .1em; color: var(--violet);
}

/* ---------- S4 funcionalidades ---------- */
.features { background: var(--warm); }
.feat-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 18px; margin-top: 40px;
}
.feat {
  background: #fff; border: 1.5px solid rgba(22,19,31,.14); border-radius: var(--radius-r1);
  padding: 26px 24px;
}
.feat:first-child { grid-column: span 2; } /* asimetría deliberada */
.feat svg { width: 34px; height: 34px; stroke: var(--violet); fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.feat h3 { margin-top: 14px; font-size: 18px; font-weight: 700; letter-spacing: -0.02em; }
.feat p { margin-top: 6px; font-size: 15px; color: var(--muted); }

/* ---------- S5 precios — franja R1 ---------- */
.pricing-strip {
  margin-top: 40px; border-top: 3px solid var(--ink); border-bottom: 1.5px dashed rgba(22,19,31,.35);
  display: grid; grid-template-columns: repeat(4, minmax(0,1fr));
}
.price-cell { padding: 26px 18px; border-right: 1.5px dashed rgba(22,19,31,.25); }
.price-cell:last-child { border-right: 0; }
.price-cell > svg { width: 20px; height: 20px; stroke: var(--ink); fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; margin-bottom: 8px; display: block; }
.price-cell .plan {
  font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: var(--muted);
}
.price-cell .price { font-family: 'JetBrains Mono', monospace; font-size: 30px; font-weight: 500; margin-top: 8px; }
.price-cell .per { font-size: 13px; color: var(--muted); }
.pricing-note { margin-top: 18px; font-size: 14.5px; color: var(--muted); }

/* ---------- S6 FAQ ---------- */
.faq details {
  border-bottom: 1.5px dashed rgba(22,19,31,.3); padding: 4px 0;
}
.faq summary {
  cursor: pointer; list-style: none; display: flex; align-items: baseline; gap: 14px;
  font-weight: 700; font-size: 17.5px; letter-spacing: -0.015em; padding: 16px 0;
}
.faq summary::before { content: "+"; font-family: 'JetBrains Mono', monospace; color: var(--violet); font-size: 20px; }
.faq details[open] summary::before { content: "−"; }
.faq summary::-webkit-details-marker { display: none; }
.faq .a { padding: 0 0 18px 34px; color: var(--muted); font-size: 15.5px; max-width: 62ch; }
.faq-wrap { max-width: 760px; margin-top: 32px; }

/* ---------- S7 cierre — R2 cartel en tinta ---------- */
.closer { background: var(--ink); color: #fff; padding: 88px 0; }
.closer h2 {
  font-size: clamp(30px, 4.6vw, 52px); font-weight: 700; letter-spacing: -0.045em;
  line-height: 1.08; max-width: 20ch;
}
.closer h2 em { font-style: normal; box-shadow: inset 0 -0.14em 0 0 var(--teal); }
.closer .hero-ctas { margin-top: 36px; }
.closer .hero-micro { color: #fff; opacity: .85; }

/* ---------- pie ---------- */
footer.site { padding: 56px 0 40px; }
.foot-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 24px;
}
.foot-grid h4 {
  font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin-bottom: 12px;
}
.foot-grid ul { list-style: none; }
.foot-grid li { margin: 8px 0; font-size: 15px; }
.foot-grid a { color: var(--ink); text-decoration: none; }
.foot-grid a:hover { text-decoration: underline; }
.foot-brand p { margin-top: 10px; font-size: 14.5px; color: var(--muted); max-width: 30ch; }
.foot-firma {
  margin-top: 44px; padding-top: 18px; border-top: 1.5px dashed rgba(22,19,31,.3);
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between;
  font-family: 'JetBrains Mono', monospace; font-size: 12px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--muted);
}

/* ---------- responsive ---------- */
@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; }
  .show-block { grid-template-columns: 1fr; gap: 24px; padding: 36px 0; }
  .show-block:nth-child(even) .show-copy { order: 1; }
  .show-block:nth-child(even) .show-visual { order: 2; }
  .devices-grid { grid-template-columns: 1fr 1fr; }
  .also-row { flex-wrap: wrap; }
  .also-row .como { flex-basis: 100%; order: 3; }
  .hero-panel { padding: 56px 24px 48px; }
  .hero-visual { padding: 44px 24px 8px; }
  .receipt-grid { grid-template-columns: 1fr; }
  .feat-grid { grid-template-columns: 1fr 1fr; }
  .feat:first-child { grid-column: span 2; }
  .pricing-strip { grid-template-columns: 1fr 1fr; }
  .price-cell:nth-child(2) { border-right: 0; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  header.site { padding: 14px 16px; gap: 8px; }
  .brand img { width: 28px; height: 28px; }
  nav.main { gap: 14px; }
  nav.main a.nav-link { font-size: 14.5px; }
  /* El CTA del encabezado se retira en pantallas chicas: el héroe repite el
     mismo botón una pantalla más abajo. Precios y Entrar NUNCA se esconden. */
  header.site .btn-sm { display: none; }
  .brand strong { font-size: 16px; }
  section { padding: 56px 0; }
  .feat-grid { grid-template-columns: 1fr; }
  .feat:first-child { grid-column: auto; }
  .stamp { font-size: 16px; right: 10px; }
  .foot-grid { grid-template-columns: 1fr; }
}