/* =============================================================
   AhorroKm — comparador de consumo diésel vs gasolina
   Estética "cabina de coche": panel oscuro con instrumentos arriba,
   contenido editorial claro debajo.

   1. Tokens
   ============================================================= */
:root {
  /* superficie clara (todo lo que va debajo de la cabina) */
  --bg: #f2f4f7;
  --bg-soft: #e7ebf0;
  --surface: #ffffff;
  --surface-2: #f7f9fb;
  --ink: #0d141b;
  --ink-soft: #3d4a57;
  --muted: #6b7887;
  --line: #dde3ea;
  --line-soft: #eaeef3;

  --accent: #0e8f7e;
  --accent-strong: #0a6f62;
  --accent-soft: #e2f4f1;

  --car-a: #2f6df0;
  --car-a-soft: #e7eeff;
  --car-b: #d97706;
  --car-b-soft: #fdf1de;

  --good: #10864a;
  --good-soft: #e5f5ec;
  --bad: #c62828;
  --bad-soft: #fdeaea;

  /* la cabina siempre es oscura, tenga el sistema el tema que tenga */
  --cockpit-bg: #080c11;
  --cockpit-bg-2: #0e141c;

  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --display: "Archivo", var(--sans);
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --radius: 16px;
  --radius-sm: 12px;
  --radius-xs: 9px;

  --shadow-sm: 0 1px 2px rgba(11, 18, 26, .06);
  --shadow: 0 2px 4px rgba(11, 18, 26, .05), 0 18px 40px -24px rgba(11, 18, 26, .35);
  --shadow-lg: 0 30px 70px -32px rgba(6, 10, 15, .55);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --gutter: clamp(1rem, 4vw, 2rem);

  --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1015;
    --bg-soft: #10171f;
    --surface: #131b24;
    --surface-2: #18212b;
    --ink: #eaf1f7;
    --ink-soft: #bfcbd6;
    --muted: #8d9caa;
    --line: #24303c;
    --line-soft: #1d2731;

    --accent: #2ed3bb;
    --accent-strong: #64e6d3;
    --accent-soft: #10312d;

    --car-a: #7ba6ff;
    --car-a-soft: #16253c;
    --car-b: #f2b143;
    --car-b-soft: #33260f;

    --good: #45dd8b;
    --good-soft: #102c1d;
    --bad: #ff6b6b;
    --bad-soft: #331819;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .5);
    --shadow: 0 2px 4px rgba(0, 0, 0, .4), 0 18px 40px -24px rgba(0, 0, 0, .9);
    --shadow-lg: 0 30px 70px -32px rgba(0, 0, 0, .95);
  }
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { -webkit-text-size-adjust: 100%; tab-size: 2; scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: var(--accent-strong); text-decoration-thickness: 1px; text-underline-offset: 3px; }
p { text-wrap: pretty; }
h1, h2, h3 {
  font-family: var(--display);
  font-weight: 700;
  text-wrap: balance;
  line-height: 1.1;
  letter-spacing: -0.025em;
}
::selection { background: var(--accent); color: #04120f; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* =============================================================
   3. Utilities
   ============================================================= */
.wrap { width: 100%; max-width: 1120px; margin-inline: auto; padding-inline: var(--gutter); }
.wrap--narrow { max-width: 780px; }

.skip-link {
  position: fixed; top: -100px; left: 1rem; z-index: 999;
  padding: .6rem 1rem; background: var(--accent); color: #04120f;
  border-radius: 8px; font-weight: 600;
}
.skip-link:focus { top: 1rem; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0;
}

.kicker, .section__kicker {
  font-family: var(--mono);
  font-size: .72rem; font-weight: 500;
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--muted);
}
.section__kicker { color: var(--accent-strong); margin-bottom: .35rem; }
.kicker { display: inline-flex; align-items: center; gap: .5rem; }
.kicker__dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
}

/* revelado suave (solo con JS activo) */
.js [data-reveal] { opacity: 0; transform: translateY(12px); }
.js [data-reveal].is-visible {
  opacity: 1; transform: none;
  transition: opacity .7s var(--ease-out), transform .7s var(--ease-out);
}

/* =============================================================
   4. Cabecera
   ============================================================= */
.site-header {
  position: sticky; top: 0; z-index: 30;
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  backdrop-filter: blur(10px) saturate(1.2);
  border-bottom: 1px solid var(--line);
}
.site-header::before {
  content: ""; position: absolute; inset: 0 0 auto; height: 2px;
  background: linear-gradient(90deg, var(--car-a), var(--accent) 45%, var(--car-b));
  opacity: .9;
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; min-height: 66px;
}
.brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--ink); text-decoration: none; }
.brand__mark {
  display: grid; place-items: center; width: 40px; height: 40px;
  border-radius: 12px; color: var(--accent-strong);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
}
.brand__text { display: grid; line-height: 1.15; }
.brand__name { font-family: var(--display); font-weight: 800; font-size: 1.08rem; letter-spacing: -0.02em; }
.brand__tag {
  font-family: var(--mono); font-size: .62rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--muted);
}
.site-nav { display: flex; gap: 1.4rem; font-size: .9rem; font-weight: 500; }
.site-nav a { color: var(--muted); text-decoration: none; position: relative; padding: .2rem 0; }
.site-nav a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 1.5px;
  background: var(--accent); transition: right .3s var(--ease-out);
}
.site-nav a:hover { color: var(--ink); }
.site-nav a:hover::after { right: 0; }
@media (max-width: 719px) { .site-nav { display: none; } }

/* =============================================================
   5. La cabina (siempre oscura)
   ============================================================= */
.cockpit {
  position: relative; isolation: isolate;
  padding: clamp(1.6rem, 4vw, 3rem) 0 clamp(2rem, 5vw, 3.4rem);
  /* color de respaldo primero: si el degradado no se pintara, el texto claro
     sigue teniendo un fondo oscuro debajo */
  background-color: var(--cockpit-bg-2);
  background-image:
    radial-gradient(120% 80% at 50% -10%, #16202b 0%, var(--cockpit-bg-2) 45%, var(--cockpit-bg) 100%);
  color: #e9f1f8;

  /* la cabina redefine los tokens: todo lo que hay dentro es oscuro */
  --surface: #121a23;
  --surface-2: #0e151d;
  --ink: #f0f6fb;
  --ink-soft: #c6d3de;
  --muted: #8595a4;
  --line: #26333f;
  --line-soft: #1d2831;
  --accent: #2ed3bb;
  --accent-strong: #64e6d3;
  --accent-soft: #0f2f2b;
  --car-a: #7ba6ff;
  --car-a-soft: #16253c;
  --car-b: #f2b143;
  --car-b-soft: #33260f;
  --good: #45dd8b;
  --good-soft: #102c1d;
  --bad: #ff6b6b;
  --bad-soft: #331819;
}
.cockpit__grain {
  position: absolute; inset: 0; z-index: -2; pointer-events: none;
  background-image: var(--grain);
  opacity: .05; mix-blend-mode: overlay;
}
.cockpit__glow {
  position: absolute; inset: -30% 0 auto; height: 70%; z-index: -1; pointer-events: none;
  background:
    radial-gradient(50% 60% at 22% 40%, color-mix(in srgb, #2ed3bb 22%, transparent) 0%, transparent 70%),
    radial-gradient(45% 55% at 82% 30%, color-mix(in srgb, #f2b143 16%, transparent) 0%, transparent 70%);
  filter: blur(10px);
}
.cockpit__edge {
  position: absolute; left: 0; right: 0; bottom: 0; height: 3px;
  background: linear-gradient(90deg, transparent, color-mix(in srgb, #2ed3bb 55%, transparent), transparent);
}
.cockpit__inner { position: relative; }

.cockpit h1 {
  margin-top: .7rem;
  font-size: clamp(1.9rem, 6vw, 3.15rem);
  font-weight: 800;
  color: #ffffff;
}
.cockpit h1 em {
  font-style: normal;
  background: linear-gradient(100deg, #2ed3bb, #7fe9db 40%, #f2b143);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__sub {
  margin-top: .7rem; max-width: 60ch;
  color: #b9c7d4; font-size: clamp(.98rem, 2.3vw, 1.08rem);
}

/* =============================================================
   6. Panel de la herramienta
   ============================================================= */
.tool-card {
  margin-top: clamp(1.2rem, 3vw, 1.9rem);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #16202a 0%, #111922 100%);
  border: 1px solid #27333f;
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255, 255, 255, .06);
  overflow: hidden;
}
.tool-card__bar {
  display: flex; align-items: center; gap: .8rem;
  padding: .6rem clamp(.9rem, 2.4vw, 1.4rem);
  background: linear-gradient(180deg, rgba(255, 255, 255, .05), rgba(255, 255, 255, 0));
  border-bottom: 1px solid #232f3a;
}
.tool-card__leds { display: inline-flex; gap: .3rem; }
.tool-card__leds i { width: 7px; height: 7px; border-radius: 50%; background: #2c3a47; }
.tool-card__leds i:first-child { background: var(--accent); box-shadow: 0 0 8px color-mix(in srgb, var(--accent) 60%, transparent); }
.tool-card__title {
  font-family: var(--mono); font-size: .7rem; letter-spacing: .16em;
  text-transform: uppercase; color: #93a3b2;
}
.tool-card__meta {
  margin-left: auto; font-family: var(--mono); font-size: .66rem;
  letter-spacing: .1em; color: #5f6f7e;
}
@media (max-width: 539px) { .tool-card__meta { display: none; } }
.tool-card__body { padding: clamp(1rem, 3vw, 1.7rem); }

/* --- campos --- */
.field { margin-bottom: 1rem; }
.field:last-child { margin-bottom: 0; }
.field label, .field__label {
  display: block; font-size: .82rem; font-weight: 600;
  color: var(--ink-soft); margin-bottom: .4rem;
  letter-spacing: .01em;
}
.field__row {
  display: flex; align-items: stretch;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: border-color .2s var(--ease-out), box-shadow .2s var(--ease-out);
}
.field__row:hover { border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.field__row:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
}
.field__icon { display: grid; place-items: center; padding-left: .7rem; color: var(--muted); }
.field__row input {
  flex: 1 1 auto; min-width: 0;
  font-family: var(--mono); font-weight: 500; font-size: .98rem;
  padding: .68rem .7rem;
  color: var(--ink);
  background: transparent; border: 0;
}
.field__row input:focus { outline: none; }
.field__unit {
  display: grid; place-items: center; white-space: nowrap;
  padding: 0 .8rem;
  font-family: var(--mono); font-size: .7rem; letter-spacing: .04em;
  color: var(--muted);
  border-left: 1px dashed var(--line);
}
.field__help { font-size: .78rem; color: var(--muted); margin-top: .35rem; }
.field__error { font-size: .8rem; font-weight: 600; color: var(--bad); margin-top: .35rem; }
.field--km { max-width: 360px; }
.field.is-invalid .field__row { border-color: var(--bad); }

/* --- selector diésel / gasolina --- */
.segmented { display: flex; gap: .4rem; position: relative; }
.segmented input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.segmented label {
  flex: 1 1 0; margin: 0; text-align: center; cursor: pointer;
  padding: .58rem .5rem; font-size: .9rem; font-weight: 600;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-xs);
  transition: color .2s var(--ease-out), border-color .2s var(--ease-out), background .2s var(--ease-out);
}
.segmented label:hover { color: var(--ink); border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); }
.segmented input:checked + label {
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 22%, transparent), transparent);
  border-color: var(--accent);
  color: var(--accent-strong);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 25%, transparent);
}
.segmented input:focus-visible + label { outline: 2px solid var(--accent); outline-offset: 2px; }

/* --- los dos coches --- */
.cars { display: grid; gap: 1rem; margin-top: 1.2rem; }
@media (min-width: 860px) { .cars { grid-template-columns: 1fr 1fr; gap: 1.2rem; } }

.car {
  position: relative; min-width: 0;
  padding: 1.05rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, .035), rgba(255, 255, 255, 0)),
    var(--surface-2);
  overflow: hidden;
}
.car::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--car-a), transparent 85%);
}
.car--b::before { background: linear-gradient(180deg, var(--car-b), transparent 85%); }
.car legend {
  display: flex; align-items: center; gap: .55rem;
  padding: 0; margin-bottom: .2rem;
  font-family: var(--display); font-weight: 700; font-size: .98rem;
}
.car__legend-text { color: var(--ink); }
.car__tag {
  display: inline-grid; place-items: center; width: 24px; height: 24px;
  border-radius: 8px; font-family: var(--mono); font-size: .74rem; font-weight: 700;
  background: var(--car-a-soft); color: var(--car-a);
  border: 1px solid color-mix(in srgb, var(--car-a) 35%, transparent);
}
.car--b legend .car__tag, .car__tag--b {
  background: var(--car-b-soft); color: var(--car-b);
  border-color: color-mix(in srgb, var(--car-b) 35%, transparent);
}

.car__hero {
  position: relative;
  display: flex; align-items: flex-end; justify-content: space-between; gap: .6rem;
  margin: .5rem 0 .9rem;
  padding-bottom: .7rem;
  border-bottom: 1px solid var(--line-soft);
}
.car__silhouette { width: 132px; max-width: 55%; height: auto; color: var(--car-a); }
.car--b .car__silhouette { color: var(--car-b); }
.car__badge {
  display: inline-flex; align-items: center; gap: .35rem;
  padding: .3rem .55rem;
  font-family: var(--mono); font-size: .66rem; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
  border-radius: 999px;
  background: var(--car-a-soft); color: var(--car-a);
  border: 1px solid color-mix(in srgb, var(--car-a) 30%, transparent);
}
.car--b .car__badge {
  background: var(--car-b-soft); color: var(--car-b);
  border-color: color-mix(in srgb, var(--car-b) 30%, transparent);
}

.car__cost {
  display: flex; align-items: baseline; justify-content: space-between; gap: .6rem;
  margin-top: .95rem; padding-top: .75rem;
  border-top: 1px dashed var(--line);
}
.car__cost-label {
  font-family: var(--mono); font-size: .66rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--muted);
}
.car__cost strong { font-family: var(--mono); font-size: 1.05rem; font-weight: 700; color: var(--ink); }

.tool-form__note { margin-top: 1.1rem; font-size: .82rem; color: var(--muted); }
.linkbtn { color: var(--accent-strong); font-weight: 600; font-size: .82rem; text-decoration: underline; text-underline-offset: 3px; padding: 0; }

/* =============================================================
   7. El cuadro de instrumentos (resultado)
   ============================================================= */
.result {
  margin-top: 1.4rem; padding-top: 1.3rem;
  border-top: 1px solid var(--line);
}
.cluster { display: grid; gap: 1rem; align-items: center; }
@media (min-width: 720px) { .cluster { grid-template-columns: 230px 1fr; gap: 1.6rem; } }

.gauge { display: grid; justify-items: center; }
.gauge__svg { width: 100%; max-width: 230px; height: auto; color: var(--muted); }
.gauge__ticks { color: color-mix(in srgb, var(--muted) 55%, transparent); stroke-width: 2; }
.gauge__arc { color: var(--muted); transition: stroke-dasharray .6s var(--ease-out), stroke-dashoffset .6s var(--ease-out), color .3s linear; }
.gauge__needle {
  color: var(--ink);
  transform-box: view-box; transform-origin: 100px 100px;
  transition: transform .8s var(--ease-out);
  filter: drop-shadow(0 2px 5px rgba(0, 0, 0, .45));
}
.gauge__hub { fill: var(--surface); stroke: var(--line); stroke-width: 2; }
.gauge__hub-dot { fill: var(--muted); }
.gauge__scale {
  fill: currentColor; color: var(--muted);
  font-family: var(--mono); font-size: 9px; letter-spacing: .12em; text-transform: uppercase;
}
.gauge__scale--right { text-anchor: end; }
.gauge__caption {
  margin-top: .1rem;
  font-family: var(--mono); font-size: .64rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--muted); text-align: center;
}
.result--save .gauge__arc { color: var(--good); }
.result--cost .gauge__arc { color: var(--bad); }
.result--save .gauge__needle { color: var(--good); }
.result--cost .gauge__needle { color: var(--bad); }

.verdict {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .28rem .7rem; margin-bottom: .55rem;
  font-family: var(--mono); font-size: .66rem; font-weight: 700;
  letter-spacing: .16em; text-transform: uppercase;
  border-radius: 999px;
  color: var(--muted);
  background: color-mix(in srgb, var(--muted) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--muted) 30%, transparent);
}
.result--save .verdict { color: var(--good); background: var(--good-soft); border-color: color-mix(in srgb, var(--good) 40%, transparent); }
.result--cost .verdict { color: var(--bad); background: var(--bad-soft); border-color: color-mix(in srgb, var(--bad) 40%, transparent); }

.result__headline {
  font-family: var(--display); font-weight: 700; letter-spacing: -0.02em;
  font-size: clamp(1.05rem, 2.6vw, 1.35rem); line-height: 1.3; text-wrap: balance;
  color: var(--ink);
}
.result__big { display: flex; align-items: baseline; gap: .5rem; margin-top: .5rem; }
.result__big[hidden] { display: none; }
.result__big span:first-child {
  font-family: var(--mono); font-weight: 700; letter-spacing: -0.03em;
  font-size: clamp(1.9rem, 6.5vw, 2.9rem); line-height: 1;
  font-variant-numeric: tabular-nums;
}
.result--save .result__big span:first-child { color: var(--good); }
.result--cost .result__big span:first-child { color: var(--bad); }
.result__big-unit {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--muted);
}

.result__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: .6rem; margin-top: 1.3rem; }
@media (min-width: 720px) { .result__grid { grid-template-columns: repeat(4, 1fr); } }
.stat {
  position: relative; overflow: hidden;
  padding: .75rem .85rem;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  border: 1px solid var(--line-soft);
}
.stat::after {
  content: ""; position: absolute; left: 0; top: 0; width: 100%; height: 1px;
  background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 55%, transparent), transparent 70%);
}
.stat__label {
  display: block; font-family: var(--mono); font-size: .62rem;
  letter-spacing: .14em; text-transform: uppercase; color: var(--muted);
}
.stat__value {
  display: block; margin-top: .2rem;
  font-family: var(--mono); font-weight: 700; font-size: 1.06rem;
  font-variant-numeric: tabular-nums; color: var(--ink);
}
.result--save .stat__value { color: var(--good); }
.result--cost .stat__value { color: var(--bad); }

/* barras */
.bars { margin-top: 1.3rem; }
.bar-row { display: grid; grid-template-columns: 1fr; gap: .3rem; align-items: center; margin-bottom: .75rem; }
@media (min-width: 540px) { .bar-row { grid-template-columns: 165px 1fr 120px; gap: .9rem; } }
.bar-row__name { display: inline-flex; align-items: center; gap: .5rem; font-size: .87rem; color: var(--ink-soft); }
.bar {
  position: relative; height: 16px; border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--line-soft);
  overflow: hidden;
}
.bar::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: repeating-linear-gradient(90deg, transparent 0 23px, color-mix(in srgb, var(--muted) 30%, transparent) 23px 24px);
  opacity: .5;
}
.bar__fill {
  display: block; height: 100%; width: 0; border-radius: 999px;
  background: linear-gradient(90deg, color-mix(in srgb, var(--car-a) 70%, transparent), var(--car-a));
  transition: width .6s var(--ease-out);
}
.bar__fill--b { background: linear-gradient(90deg, color-mix(in srgb, var(--car-b) 70%, transparent), var(--car-b)); }
.bar-row__value {
  font-family: var(--mono); font-size: .88rem; font-weight: 700;
  font-variant-numeric: tabular-nums; text-align: right; color: var(--ink);
}
@media (max-width: 539px) { .bar-row__value { text-align: left; } }
.bars__caption { font-size: .76rem; color: var(--muted); }

/* botones */
.result__actions { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.4rem; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
  padding: .8rem 1.3rem; border-radius: var(--radius-sm);
  font-weight: 600; font-size: .95rem; text-decoration: none;
  border: 1px solid transparent;
  transition: transform .18s var(--ease-out), box-shadow .18s var(--ease-out),
              background .18s var(--ease-out), border-color .18s var(--ease-out);
}
.btn--primary {
  color: #04231e;
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 92%, #fff), var(--accent));
  box-shadow: 0 10px 24px -14px color-mix(in srgb, var(--accent) 90%, transparent),
              inset 0 1px 0 rgba(255, 255, 255, .45);
}
.btn--primary:hover { transform: translateY(-1px); box-shadow: 0 16px 30px -14px color-mix(in srgb, var(--accent) 95%, transparent), inset 0 1px 0 rgba(255, 255, 255, .5); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent-strong); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }

.noscript {
  margin-top: 1rem; padding: .85rem 1rem; font-size: .9rem;
  background: var(--bad-soft); color: var(--bad);
  border: 1px solid color-mix(in srgb, var(--bad) 35%, transparent);
  border-radius: var(--radius-sm);
}

/* --- franja de confianza --- */
.trust {
  list-style: none; padding: 0; margin-top: 1.3rem;
  display: grid; gap: .7rem;
}
@media (min-width: 860px) { .trust { grid-template-columns: repeat(3, 1fr); gap: 1rem; } }
.trust__item {
  display: flex; align-items: flex-start; gap: .6rem;
  padding: .75rem .9rem;
  font-size: .84rem; color: #a9b8c6;
  background: rgba(255, 255, 255, .025);
  border: 1px solid #1f2b36;
  border-radius: var(--radius-sm);
}
.trust__item svg { flex: 0 0 auto; margin-top: .15rem; color: var(--accent); }
.trust__item strong { color: #dfe9f2; font-weight: 600; }

/* =============================================================
   8. Huecos de publicidad (solo marcadores, sin código de terceros)
   ============================================================= */
.ad-slot {
  position: relative;
  display: grid; place-items: center;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    repeating-linear-gradient(135deg,
      color-mix(in srgb, var(--muted) 7%, transparent) 0 8px,
      transparent 8px 18px),
    var(--surface-2);
  color: var(--muted);
}
.ad-slot::before, .ad-slot::after {
  content: ""; position: absolute; width: 14px; height: 14px;
  border: 2px solid color-mix(in srgb, var(--accent) 45%, transparent);
  opacity: .7;
}
.ad-slot::before { top: 8px; left: 8px; border-right: 0; border-bottom: 0; border-radius: 4px 0 0 0; }
.ad-slot::after { bottom: 8px; right: 8px; border-left: 0; border-top: 0; border-radius: 0 0 4px 0; }
.ad-slot__label {
  font-family: var(--mono); font-size: .68rem; font-weight: 700;
  letter-spacing: .3em; text-transform: uppercase;
  padding-left: .3em;
  color: color-mix(in srgb, var(--muted) 65%, var(--ink));
}
.ad-slot--leaderboard { min-height: 104px; margin: 1.8rem 0; }
@media (min-width: 960px) { .ad-slot--leaderboard { min-height: 118px; } }
.ad-slot--incontent { min-height: 254px; margin: 2rem 0; }
.ad-slot--modal { min-height: 250px; width: 100%; }
.ad-slot--toast { min-height: 86px; width: 100%; }

/* pop-up de descarga */
.ad-modal {
  width: min(370px, calc(100vw - 2rem));
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-lg);
}
.ad-modal::backdrop { background: rgba(5, 9, 13, .62); backdrop-filter: blur(3px); }
.ad-modal__head { display: flex; align-items: center; justify-content: space-between; gap: .6rem; margin-bottom: .85rem; }
.ad-modal__title { display: inline-flex; align-items: center; gap: .5rem; font-weight: 600; font-size: .93rem; }
.ad-modal__check {
  display: grid; place-items: center; width: 24px; height: 24px; border-radius: 50%;
  background: var(--good-soft); color: var(--good);
  border: 1px solid color-mix(in srgb, var(--good) 40%, transparent);
}
.ad-modal__close, .ad-toast__close {
  display: grid; place-items: center; flex: 0 0 auto;
  width: 32px; height: 32px; border-radius: 50%;
  color: var(--muted); background: var(--surface-2); border: 1px solid var(--line);
  transition: color .18s var(--ease-out), border-color .18s var(--ease-out);
}
.ad-modal__close:hover, .ad-toast__close:hover { color: var(--ink); border-color: var(--muted); }
.ad-modal__continue { width: 100%; margin-top: .85rem; }

/* notificación de esquina */
.ad-toast {
  position: fixed; right: 1rem; bottom: 1rem; z-index: 40;
  width: min(330px, calc(100vw - 2rem));
  padding: .7rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  animation: toastIn .45s var(--ease-out) both;
}
.ad-toast[hidden] { display: none; }
.ad-toast__close { position: absolute; top: -12px; right: -8px; background: var(--surface); }
@keyframes toastIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }

/* =============================================================
   9. Contenido editorial
   ============================================================= */
.section { padding: clamp(2rem, 5vw, 3.4rem) 0; }
.section h2 { font-size: clamp(1.4rem, 3.8vw, 2rem); margin-bottom: 1.2rem; }
.section h3 { font-size: 1.08rem; margin: 1.8rem 0 .45rem; }
.section--prose p { color: var(--ink-soft); margin-bottom: .95rem; }
.section--prose strong { color: var(--ink); font-weight: 600; }

.steps { list-style: none; padding: 0; display: grid; gap: 1rem; }
@media (min-width: 860px) { .steps { grid-template-columns: repeat(3, 1fr); } }
.step {
  position: relative; overflow: hidden;
  padding: 1.4rem 1.2rem 1.2rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.step::before {
  content: ""; position: absolute; top: 0; left: 0; width: 46px; height: 3px;
  background: var(--accent);
}
.step__num {
  position: absolute; top: .3rem; right: .8rem;
  font-family: var(--display); font-weight: 800; font-size: 3.4rem;
  line-height: 1; color: var(--ink); opacity: .06;
}
.step h3 { margin: 0 0 .35rem; font-size: 1.02rem; }
.step p { font-size: .92rem; color: var(--muted); margin: 0; }

.formula {
  position: relative;
  font-family: var(--mono); font-size: .92rem; font-weight: 500;
  padding: 1.1rem 1.1rem .95rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--surface);
  color: var(--ink) !important;
  overflow-x: auto;
}
.formula__label {
  position: absolute; top: -.62rem; left: .9rem;
  padding: 0 .45rem;
  font-size: .6rem; letter-spacing: .18em; text-transform: uppercase;
  background: var(--bg); color: var(--accent-strong);
}

.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--line); background: var(--surface); }
.table { width: 100%; border-collapse: collapse; font-size: .92rem; min-width: 420px; }
.table caption {
  caption-side: top; text-align: left;
  font-family: var(--mono); font-size: .66rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted); padding: .8rem .9rem .5rem;
}
.table th, .table td { padding: .68rem .9rem; text-align: left; border-bottom: 1px solid var(--line-soft); }
.table thead th {
  background: var(--surface-2);
  font-family: var(--mono); font-size: .68rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .1em; color: var(--muted);
}
.table tbody td:not(:first-child) { font-family: var(--mono); font-size: .86rem; color: var(--ink-soft); }
.table tbody tr:last-child td { border-bottom: 0; }
.table tbody tr:hover { background: color-mix(in srgb, var(--accent) 5%, transparent); }
.table__note { font-size: .78rem; color: var(--muted); margin-top: .5rem; }

.faq {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  margin-bottom: .55rem;
  overflow: hidden;
  transition: border-color .2s var(--ease-out);
}
.faq:hover { border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.faq summary {
  cursor: pointer; list-style: none; position: relative;
  padding: .95rem 3rem .95rem 1.1rem;
  font-weight: 600; font-size: .95rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 1.1rem; top: 50%;
  width: 10px; height: 10px; margin-top: -7px;
  border-right: 2px solid var(--accent); border-bottom: 2px solid var(--accent);
  transform: rotate(45deg); transition: transform .25s var(--ease-out);
}
.faq[open] summary::after { transform: rotate(-135deg); margin-top: -2px; }
.faq[open] summary { color: var(--accent-strong); }
.faq p { padding: 0 1.1rem 1.1rem; color: var(--ink-soft); font-size: .93rem; }

.tools-grid { list-style: none; padding: 0; display: grid; gap: .8rem; }
@media (min-width: 860px) { .tools-grid { grid-template-columns: repeat(3, 1fr); } }
.tool-chip {
  padding: 1rem;
  background: var(--surface);
  border: 1px dashed var(--line);
  border-radius: var(--radius-sm);
}
.tool-chip__icon {
  display: grid; place-items: center; width: 34px; height: 34px; margin-bottom: .6rem;
  border-radius: 10px; background: var(--accent-soft); color: var(--accent-strong);
}
.tool-chip strong { display: block; font-size: .96rem; }
.tool-chip span { font-size: .85rem; color: var(--muted); }
.tools-grid__note { margin-top: .8rem; font-size: .8rem; color: var(--muted); }

/* =============================================================
   10. Pie
   ============================================================= */
.site-footer {
  position: relative; margin-top: 1rem; padding: 2.4rem 0;
  background: var(--cockpit-bg-2);
  color: #b6c4d1;
}
.site-footer::before {
  content: ""; position: absolute; inset: 0 0 auto; height: 2px;
  background: linear-gradient(90deg, transparent, color-mix(in srgb, #2ed3bb 60%, transparent), transparent);
}
.site-footer__inner { display: grid; gap: .9rem; }
.site-footer__brand { display: flex; align-items: center; gap: .7rem; }
.site-footer__brand .brand__mark { background: rgba(46, 211, 187, .1); color: #2ed3bb; border-color: rgba(46, 211, 187, .28); }
.site-footer__brand p { font-size: .92rem; color: #d3dee8; font-weight: 500; }
.site-footer__links { display: flex; gap: 1.2rem; font-size: .88rem; }
.site-footer__links a { color: #8fe6d8; }
.site-footer__legal { font-size: .78rem; color: #7d8b98; max-width: 70ch; }

/* =============================================================
   11. Páginas legales
   ============================================================= */
.legal { padding: clamp(2rem, 5vw, 3rem) 0; }
.legal h1 { font-size: clamp(1.6rem, 4.5vw, 2.1rem); margin-bottom: 1.2rem; }
.legal h2 { font-family: var(--display); font-size: 1.1rem; margin: 1.8rem 0 .45rem; }
.legal p, .legal li { color: var(--ink-soft); font-size: .95rem; margin-bottom: .7rem; }
.legal ul { padding-left: 1.2rem; }
.legal .todo {
  background: var(--car-b-soft); border: 1px solid color-mix(in srgb, var(--car-b) 35%, transparent);
  border-left: 3px solid var(--car-b);
  padding: .85rem 1rem; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: .88rem;
}

/* =============================================================
   12. Móvil: ritmo vertical más apretado
   ============================================================= */
@media (max-width: 539px) {
  .cockpit { padding-top: .95rem; }
  .cockpit h1 { margin-top: .5rem; font-size: 1.72rem; }
  .hero__sub { margin-top: .45rem; font-size: .9rem; line-height: 1.45; }
  .tool-card { margin-top: .9rem; }
  .tool-card__bar { padding: .45rem .8rem; }
  .tool-card__body { padding: .85rem; }
  .field { margin-bottom: .7rem; }
  .field label, .field__label { margin-bottom: .3rem; font-size: .8rem; }
  .field__row input { padding: .6rem .65rem; font-size: .95rem; }
  .field__help { margin-top: .25rem; }
  .field--km { max-width: none; }
  .segmented label { padding: .5rem .5rem; }
  .cars { margin-top: .8rem; gap: .75rem; }
  .car { padding: .8rem; }
  .car__hero { margin: .35rem 0 .65rem; padding-bottom: .5rem; }
  .car__silhouette { width: 84px; }
  .car__badge { font-size: .62rem; padding: .26rem .5rem; }
  .car__cost { margin-top: .7rem; padding-top: .55rem; }
  .result { margin-top: 1rem; padding-top: 1rem; }
  .trust { margin-top: 1rem; }
  .trust__item { font-size: .82rem; padding: .65rem .8rem; }
}

/* =============================================================
   13. Movimiento reducido: se apaga lo que se mueve solo
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .bar__fill, .gauge__needle, .gauge__arc { transition: none; }
  .ad-toast { animation: none; }
  .js [data-reveal] { opacity: 1; transform: none; }
}