/* QuinaLytics · página de presentación
   La paleta sale de los estados asociativos: seleccionado, posible, alternativo y excluido. */

@font-face {
  font-family: 'Bricolage Grotesque';
  src: url('fonts/bricolage-grotesque-latin-wght-normal.woff2') format('woff2-variations');
  font-weight: 200 800;
  font-display: swap;
}
@font-face {
  font-family: 'Instrument Sans';
  src: url('fonts/instrument-sans-latin-wght-normal.woff2') format('woff2-variations');
  font-weight: 400 700;
  font-display: swap;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('fonts/jetbrains-mono-latin-400-normal.woff2') format('woff2');
  font-weight: 400;
  font-display: swap;
}

:root {
  --tinta: #0f2a3d;
  --tinta-2: #3c566c;
  --papel: #eef2f4;
  --posible: #ffffff;
  --alternativo: #dde3e8;
  --excluido: #9aa5b1;
  --seleccion: #1f9d55;
  --seleccion-osc: #167a42;
  --marea: #14b8a6;

  --display: 'Bricolage Grotesque', 'Segoe UI', system-ui, sans-serif;
  --body: 'Instrument Sans', 'Segoe UI', system-ui, sans-serif;
  --mono: 'JetBrains Mono', Consolas, 'SFMono-Regular', monospace;

  --gutter: clamp(16px, 4vw, 48px);
  --max: 1180px;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    transition: none !important;
    animation: none !important;
  }
}
body {
  margin: 0;
  background: var(--papel);
  color: var(--tinta);
  font: 400 17px/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
}
:focus-visible {
  outline: 3px solid var(--marea);
  outline-offset: 2px;
  border-radius: 4px;
}
.skip {
  position: absolute;
  left: -999px;
  top: 8px;
  background: var(--tinta);
  color: #fff;
  padding: 8px 12px;
  z-index: 10;
}
.skip:focus {
  left: 8px;
}

h1,
h2,
h3 {
  font-family: var(--display);
  line-height: 1.05;
  margin: 0;
  letter-spacing: -0.02em;
}
h2 {
  font-size: clamp(30px, 4.2vw, 48px);
  font-weight: 750;
}
h3 {
  font-size: 19px;
  font-weight: 650;
  letter-spacing: -0.01em;
}
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font: 600 16px/1 var(--body);
  text-decoration: none;
  padding: 14px 20px;
  border-radius: 10px;
  border: 2px solid var(--tinta);
  transition:
    background 0.15s,
    color 0.15s,
    transform 0.15s;
}
.btn:hover {
  transform: translateY(-1px);
}
.btn-solid {
  background: var(--tinta);
  color: #fff;
}
.btn-solid:hover {
  background: var(--seleccion-osc);
  border-color: var(--seleccion-osc);
}
.btn-line {
  background: transparent;
  color: var(--tinta);
}
.btn-line:hover {
  background: var(--posible);
}
.btn.small {
  padding: 9px 14px;
  font-size: 14px;
  border-radius: 8px;
}

/* ---------- Cabecera ---------- */
.top {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px var(--gutter);
  display: flex;
  align-items: center;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font: 600 20px/1 var(--display);
  letter-spacing: -0.01em;
}
.logo b {
  color: var(--seleccion);
  font-weight: 800;
}
.top nav {
  display: flex;
  gap: 22px;
  margin-left: auto;
  font-size: 15px;
}
.top nav a {
  text-decoration: none;
  color: var(--tinta-2);
}
.top nav a:hover {
  color: var(--tinta);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- Portada ---------- */
.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(28px, 6vw, 72px) var(--gutter) clamp(48px, 8vw, 96px);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}
.eyebrow {
  font: 500 13px/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--tinta-2);
  margin: 0 0 18px;
}
.hero h1 {
  font-size: clamp(38px, 4.9vw, 64px);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 0.98;
}
/* La segunda línea del titular usa los estados: el texto "se enciende" como un valor seleccionado. */
.hl {
  background: linear-gradient(transparent 58%, rgb(31 157 85 / 28%) 58%);
  font-weight: 650;
}
.lead {
  font-size: clamp(17px, 1.6vw, 20px);
  color: var(--tinta-2);
  max-width: 34em;
  margin: 24px 0 28px;
}
.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.fine {
  font-size: 14px;
  color: var(--tinta-2);
  margin: 16px 0 0;
}

/* ---------- Demo asociativo (elemento distintivo) ---------- */
.demo {
  margin: 0;
  background: var(--tinta);
  color: #fff;
  border-radius: 18px;
  padding: 18px;
  box-shadow:
    0 30px 60px -30px rgb(15 42 61 / 55%),
    0 2px 0 rgb(255 255 255 / 6%) inset;
}
.demo-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  min-height: 30px;
}
.demo-title {
  font: 500 13px/1 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #b9c8d4;
}
.demo-clear {
  font: 500 13px/1 var(--body);
  background: rgb(255 255 255 / 10%);
  color: #fff;
  border: 0;
  border-radius: 6px;
  padding: 7px 10px;
  cursor: pointer;
}
.demo-clear:hover {
  background: rgb(255 255 255 / 18%);
}
.demo-boxes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.lb {
  background: var(--posible);
  color: var(--tinta);
  border-radius: 10px;
  overflow: hidden;
}
.lb h3 {
  font: 600 12px/1 var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 10px 10px 8px;
  color: var(--tinta-2);
  border-bottom: 1px solid var(--alternativo);
}
.lb ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.lb button {
  display: block;
  width: 100%;
  text-align: left;
  border: 0;
  border-bottom: 1px solid rgb(15 42 61 / 6%);
  padding: 9px 10px;
  font: 500 14px/1.2 var(--body);
  cursor: pointer;
  color: var(--tinta);
  background: var(--posible);
  transition:
    background 0.18s,
    color 0.18s;
}
.lb button:hover {
  box-shadow: inset 3px 0 0 var(--seleccion);
}
.lb button[data-state='sel'] {
  background: var(--seleccion);
  color: #fff;
  font-weight: 650;
}
.lb button[data-state='alt'] {
  background: var(--alternativo);
}
.lb button[data-state='exc'] {
  background: var(--excluido);
  color: #fff;
}
.demo-kpi {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-top: 16px;
}
.kpi-num {
  display: block;
  font: 750 clamp(28px, 3.4vw, 40px)/1 var(--display);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.kpi-lbl {
  display: block;
  font-size: 14px;
  color: #b9c8d4;
  margin-top: 6px;
}
.meter {
  flex: 0 0 38%;
  height: 8px;
  border-radius: 4px;
  background: rgb(255 255 255 / 14%);
  overflow: hidden;
  margin-bottom: 8px;
}
.meter span {
  display: block;
  height: 100%;
  width: 100%;
  background: var(--seleccion);
  transition: width 0.35s ease;
}
.demo figcaption {
  font-size: 14px;
  color: #b9c8d4;
  margin-top: 14px;
  border-top: 1px solid rgb(255 255 255 / 10%);
  padding-top: 12px;
}

/* ---------- Franjas ---------- */
.band {
  background: var(--posible);
  padding: clamp(56px, 8vw, 104px) 0;
}
.band-ink {
  background: var(--tinta);
  color: #fff;
}
.section-lead {
  font-size: 18px;
  color: var(--tinta-2);
  max-width: 40em;
  margin: 16px 0 40px;
}

/* Los cuatro estados: cada tarjeta muestra el valor tal como se ve en un cuadro de lista. */
.states {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border: 1px solid var(--alternativo);
  border-radius: 14px;
  overflow: hidden;
}
.states li {
  padding: 22px 20px 24px;
  border-right: 1px solid var(--alternativo);
}
.states li:last-child {
  border-right: 0;
}
.states p {
  color: var(--tinta-2);
  font-size: 15.5px;
  margin: 8px 0 0;
}
.chip-state {
  display: block;
  font: 500 15px/1 var(--body);
  padding: 12px 12px;
  border-radius: 8px;
  margin-bottom: 18px;
  border: 1px solid var(--alternativo);
}
.is-sel {
  background: var(--seleccion);
  border-color: var(--seleccion);
  color: #fff;
  font-weight: 650;
}
.is-pos {
  background: var(--posible);
}
.is-alt {
  background: var(--alternativo);
}
.is-exc {
  background: var(--excluido);
  border-color: var(--excluido);
  color: #fff;
}

/* ---------- Capacidades ---------- */
.features {
  padding-top: clamp(56px, 8vw, 104px);
  padding-bottom: clamp(56px, 8vw, 104px);
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px 40px;
  margin: 40px 0 48px;
}
.feature-grid article {
  border-top: 2px solid var(--tinta);
  padding-top: 16px;
}
.feature-grid p {
  color: var(--tinta-2);
  font-size: 16px;
  margin: 10px 0 0;
}
.code-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.code {
  margin: 0;
  background: #0b1f2e;
  color: #e6edf3;
  border-radius: 14px;
  overflow: hidden;
}
.code figcaption {
  font: 500 12px/1 var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #8fa3b4;
  padding: 14px 18px;
  border-bottom: 1px solid rgb(255 255 255 / 8%);
}
.code pre {
  margin: 0;
  padding: 16px 18px 20px;
  overflow-x: auto;
  font: 400 14px/1.7 var(--mono);
}
.code .f {
  color: #5eead4;
}
.code .k {
  color: #f9a8d4;
}
.code .s {
  color: #86efac;
}

/* ---------- Pasos ---------- */
.band-ink h2 {
  color: #fff;
}
.steps {
  list-style: none;
  counter-reset: paso;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px;
}
.steps li {
  counter-increment: paso;
}
.steps li::before {
  content: counter(paso);
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 2px solid var(--seleccion);
  color: var(--seleccion);
  font: 700 17px/1 var(--display);
  margin-bottom: 16px;
}
.steps p {
  color: #c4d2dd;
  font-size: 16px;
  margin: 8px 0 0;
}

/* ---------- Privacidad ---------- */
.privacy {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 48px;
  padding-top: clamp(56px, 8vw, 104px);
  padding-bottom: clamp(56px, 8vw, 104px);
  align-items: start;
}
.privacy p {
  color: var(--tinta-2);
  font-size: 17px;
  margin: 16px 0 0;
  max-width: 36em;
}
.facts {
  margin: 0;
  background: var(--posible);
  border-radius: 14px;
  padding: 8px 22px;
}
.facts div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--alternativo);
}
.facts div:last-child {
  border-bottom: 0;
}
.facts dt {
  font: 500 13px/1.4 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--tinta-2);
}
.facts dd {
  margin: 0;
  font-weight: 600;
  text-align: right;
}

/* ---------- Cierre ---------- */
.final {
  text-align: center;
  padding: clamp(56px, 8vw, 96px) var(--gutter);
  background: var(--alternativo);
}
.final p {
  color: var(--tinta-2);
  margin: 14px auto 26px;
  max-width: 32em;
}
.foot {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px var(--gutter) 40px;
  font-size: 14px;
  color: var(--tinta-2);
}

/* ---------- Responsivo ---------- */
@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .states,
  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .states li:nth-child(2) {
    border-right: 0;
  }
  .states li:nth-child(-n + 2) {
    border-bottom: 1px solid var(--alternativo);
  }
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .code-pair,
  .privacy {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 620px) {
  .top nav {
    display: none;
  }
  .top .btn {
    margin-left: auto;
  }
  .demo-boxes {
    grid-template-columns: 1fr 1fr;
  }
  .demo-boxes .lb:last-child {
    grid-column: 1 / -1;
  }
  .states,
  .steps,
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .states li {
    border-right: 0;
    border-bottom: 1px solid var(--alternativo);
  }
  .states li:last-child {
    border-bottom: 0;
  }
  .meter {
    flex-basis: 30%;
  }
}