/* =============================================================================
   CALCULADORA LUZ Y GAS
   styles.css
   -----------------------------------------------------------------------------
   Paleta:
     · Azul cielo de marca  #38BDF8  (acentos, botones principales)
     · Azul profundo        #0369A1  (texto de acento sobre fondo claro)
     · Gris oscuro          #1F1F23  (tipografía y secciones oscuras)
     · Titulares            Space Grotesk
     · Texto                Montserrat
   Estética: minimalista, mucho blanco, bordes finos, sombras muy suaves.
   Mobile-first: los breakpoints amplían, nunca comprimen.
   ========================================================================== */

/* ---------------------------------------------------------------------------
   1. TOKENS
   ------------------------------------------------------------------------ */
:root {
  --sky: #38bdf8;         /* azul cielo de marca */
  --sky-dark: #0ea5e9;    /* estados hover */
  --sky-soft: #e0f2fe;    /* fondos suaves */
  --sky-tint: #f5fbff;    /* fondos muy suaves */
  /* Azul oscuro para texto de acento: cumple AA sobre blanco y sobre --sky-soft,
     cosa que el azul cielo de marca no hace por sí solo. */
  --sky-text: #0369a1;

  --ink: #14141a;
  --ink-2: #1f1f23;
  --muted: #5c6070;
  /* Tono secundario: fijado para cumplir contraste AA (>=4.5:1) sobre blanco
     y sobre --bg-alt, ya que se usa en textos pequeños reales (microcopy,
     contador de pasos, títulos del footer), no sólo en elementos decorativos. */
  --muted-2: #6c7080;

  --bg: #ffffff;
  --bg-alt: #fafafb;
  --line: #e8e8ee;
  --line-strong: #d5d5de;

  /* Verde de "ahorro": oscurecido para cumplir AA también sobre --green-soft,
     que es donde se usa a 18px (fila destacada del resultado). */
  --green: #0a6b41;
  --green-soft: #eaf6f0;
  --danger: #c0341d;

  --shadow-sm: 0 1px 2px rgba(20, 20, 26, 0.04);
  --shadow-md: 0 4px 16px rgba(20, 20, 26, 0.06);
  --shadow-lg: 0 12px 40px rgba(20, 20, 26, 0.08);

  --radius: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  --font-title: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-body: "Montserrat", "Segoe UI", system-ui, -apple-system, sans-serif;

  --header-h: 66px;
  --wrap: 1140px;
}

/* ---------------------------------------------------------------------------
   2. RESET MÍNIMO
   ------------------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }

/* El atributo [hidden] debe ganar siempre: varios componentes de esta hoja
   declaran display:flex/inline-flex, que por especificidad lo anularían. */
[hidden] { display: none !important; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-title);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.022em;
  margin: 0 0 0.6em;
  color: var(--ink);
}

h1 { font-size: clamp(2rem, 5.2vw, 3.1rem); }
h2 { font-size: clamp(1.55rem, 3.6vw, 2.25rem); }
h3 { font-size: 1.06rem; }

p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

a { color: inherit; text-decoration: none; }

ul, ol { margin: 0; padding: 0; list-style: none; }

img, svg { max-width: 100%; display: block; }

button, input, select, textarea { font: inherit; color: inherit; }

strong { font-weight: 600; }

:focus-visible {
  outline: 3px solid var(--sky);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------------------------------------------------------------------------
   3. LAYOUT
   ------------------------------------------------------------------------ */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 20px;
}

.wrap--narrow { max-width: 780px; }

.section {
  padding: 68px 0;
  border-top: 1px solid var(--line);
}

.section--alt { background: var(--bg-alt); }

.section__intro {
  max-width: 62ch;
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 2.2rem;
}

section[id] { scroll-margin-top: calc(var(--header-h) + 12px); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--ink-2);
  color: #fff;
  padding: 12px 18px;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; }

/* ---------------------------------------------------------------------------
   4. HEADER
   ------------------------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.22rem;
  letter-spacing: -0.03em;
  flex-shrink: 0;
}

.brand__mark { color: var(--sky); display: inline-flex; }
.brand__name { color: var(--ink); }

.site-nav { margin-left: auto; display: none; }

.site-nav ul { display: flex; gap: 28px; }

.site-nav a {
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--muted);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}
.site-nav a:hover { color: var(--ink); border-bottom-color: var(--sky); }

.site-header__cta { margin-left: auto; }
.site-nav + .site-header__cta { margin-left: 0; }

@media (min-width: 900px) {
  .site-nav { display: block; }
}

/* ---------------------------------------------------------------------------
   5. BOTONES
   ------------------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 13px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.98rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: background-color 0.16s ease, border-color 0.16s ease,
              color 0.16s ease, transform 0.12s ease, box-shadow 0.16s ease;
}

.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--sky);
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(20, 20, 26, 0.08);
}
.btn--primary:hover { background: var(--sky-dark); }

.btn--secondary {
  background: #fff;
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn--secondary:hover { border-color: var(--ink); background: var(--sky-tint); }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
  min-height: 42px;
  padding: 9px 18px;
  font-size: 0.9rem;
}
.btn--ghost:hover { border-color: var(--ink); background: var(--sky-soft); }

.btn--ghost-dark {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
}
.btn--ghost-dark:hover { border-color: #fff; background: rgba(255, 255, 255, 0.08); }

.btn--text {
  background: none;
  border: none;
  color: var(--muted);
  min-height: 44px;
  padding: 10px 6px;
  font-weight: 500;
}
.btn--text:hover { color: var(--ink); text-decoration: underline; }

.btn--block { width: 100%; }

/* ---------------------------------------------------------------------------
   6. HERO
   ------------------------------------------------------------------------ */
.hero {
  padding: 44px 0 60px;
  background:
    radial-gradient(760px 380px at 88% -8%, rgba(56, 189, 248, 0.16), transparent 62%),
    var(--bg);
}

.hero__grid {
  display: grid;
  gap: 40px;
  align-items: start;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 6px 14px 6px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--muted);
}

.dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--sky);
  flex-shrink: 0;
}

.lead {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 46ch;
  margin-bottom: 1.6rem;
}

.hero__points { display: grid; gap: 11px; margin-bottom: 1.7rem; }

.hero__points li {
  position: relative;
  padding-left: 30px;
  font-size: 0.97rem;
  color: var(--ink);
}

.hero__points li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.42em;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--sky-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%230369a1'%3E%3Cpath d='M8.2 13.6 4.9 10.3l1.2-1.2 2.1 2.1 5-5 1.2 1.2z'/%3E%3C/svg%3E") center/16px no-repeat;
}

.hero__note {
  font-size: 0.9rem;
  color: var(--muted-2);
}
.hero__note a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }

@media (min-width: 1000px) {
  .hero { padding: 64px 0 84px; }
  .hero__grid { grid-template-columns: 1fr 470px; gap: 56px; }
}

/* ---------------------------------------------------------------------------
   7. CALCULADORA
   ------------------------------------------------------------------------ */
.calc {
  scroll-margin-top: calc(var(--header-h) + 16px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.calc__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 24px 14px;
}

.calc__title {
  font-size: 1.08rem;
  margin: 0;
  letter-spacing: -0.01em;
}

.calc__step-label {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted-2);
  white-space: nowrap;
}

.calc__progress {
  height: 3px;
  background: var(--line);
  margin: 0 24px;
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.calc__progress-bar {
  display: block;
  height: 100%;
  background: var(--sky);
  border-radius: inherit;
  transition: width 0.32s cubic-bezier(0.22, 1, 0.36, 1);
}

.calc__body { padding: 24px; }

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px; height: 1px;
  overflow: hidden;
}

/* --- Pasos --- */
.step {
  border: 0;
  margin: 0;
  padding: 0;
  min-width: 0; /* evita el desbordamiento clásico de fieldset en flex/grid */
  animation: stepIn 0.26s ease both;
}

@keyframes stepIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: none; }
}

.step__legend {
  display: block;
  padding: 0;
  font-family: var(--font-title);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 6px;
}

.step__help {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 18px;
}

/* --- Selección de suministro --- */
.choice-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.choice { display: block; cursor: pointer; }
.choice--wide { grid-column: 1 / -1; }

.choice input {
  position: absolute;
  opacity: 0;
  width: 1px; height: 1px;
}

.choice__box {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  height: 100%;
  padding: 16px 16px 15px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: border-color 0.16s ease, background-color 0.16s ease, box-shadow 0.16s ease;
}

.choice:hover .choice__box { border-color: var(--line-strong); background: var(--sky-tint); }

.choice input:checked + .choice__box {
  border-color: var(--sky);
  background: var(--sky-soft);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.18);
}

.choice input:focus-visible + .choice__box {
  outline: 3px solid var(--sky);
  outline-offset: 2px;
}

.choice__icon { font-size: 1.32rem; line-height: 1.4; }
.choice__label { font-family: var(--font-title); font-weight: 600; font-size: 1.02rem; }
.choice__hint { font-size: 0.78rem; color: var(--muted); line-height: 1.45; }

/* --- Campos --- */
.field { margin-bottom: 14px; }
.field:last-of-type { margin-bottom: 0; }

.field__label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 6px;
}

.field__input {
  width: 100%;
  min-height: 52px;
  padding: 13px 15px;
  border: 1.5px solid var(--line-strong);
  border-radius: var(--radius);
  background: #fff;
  font-size: 1rem;
  transition: border-color 0.16s ease, box-shadow 0.16s ease;
  appearance: none;
}

/* Contraste AA sin que el placeholder se confunda con un valor introducido:
   se oscurece el color pero se mantiene en peso normal, mientras que los
   importes y el código postal se escriben en negrita. */
.field__input::placeholder { color: #6f7484; font-weight: 400; }

.field__input:hover { border-color: var(--muted-2); }

.field__input:focus {
  outline: none;
  border-color: var(--sky);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

.field__input[aria-invalid="true"] {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(192, 52, 29, 0.12);
}

.field__input--wide-text {
  font-size: 1.28rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  max-width: 190px;
}

select.field__input {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%235c6070'%3E%3Cpath d='M5.5 7.5 10 12l4.5-4.5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 20px;
  padding-right: 40px;
  cursor: pointer;
}

.amount-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 420px) {
  .amount-row { grid-template-columns: 1.15fr 1fr; align-items: end; }
  .amount-row .field { margin-bottom: 0; }
}

.input-euro { position: relative; }

.input-euro .field__input {
  padding-right: 44px;
  font-size: 1.28rem;
  font-weight: 600;
}

.input-euro__unit {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--muted-2);
  pointer-events: none;
}

/* --- Rangos rápidos --- */
.range-label {
  margin: 20px 0 9px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
}

.range-chips { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  padding: 9px 15px;
  min-height: 40px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background: #fff;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.16s ease, background-color 0.16s ease, color 0.16s ease;
}

.chip:hover { border-color: var(--ink); background: var(--sky-tint); }

.chip.is-selected {
  border-color: var(--sky);
  background: var(--sky-soft);
  font-weight: 600;
}

/* --- Consentimiento --- */
.consent { margin-top: 20px; display: grid; gap: 14px; }

.check {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 11px;
  align-items: start;
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--muted);
  cursor: pointer;
}

.check input {
  width: 20px; height: 20px;
  margin: 2px 0 0;
  accent-color: var(--sky);
  flex-shrink: 0;
  cursor: pointer;
}

.check a { color: var(--ink); text-decoration: underline; text-underline-offset: 2px; }

.check--optional { color: var(--muted-2); }

.microcopy {
  margin: 14px 0 0;
  font-size: 0.76rem;
  color: var(--muted-2);
  line-height: 1.55;
}

/* --- Errores --- */
.field-error {
  margin: 7px 0 0;
  font-size: 0.83rem;
  font-weight: 500;
  color: var(--danger);
  min-height: 0;
}
.field-error:empty { margin: 0; }

/* --- Navegación de la calculadora --- */
.calc__nav {
  display: flex;
  flex-direction: column-reverse;
  gap: 6px;
  margin-top: 22px;
}

@media (min-width: 480px) {
  .calc__nav {
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }
  #btn-back { flex: 0 0 auto; }
  #btn-next { flex: 1 1 auto; }
}

.calc__legal {
  margin: 14px 0 0;
  font-size: 0.73rem;
  color: var(--muted-2);
  text-align: center;
}

.calc__notice {
  margin: 0;
  padding: 16px 24px 22px;
  font-size: 0.84rem;
  color: var(--danger);
  background: #fdf3f1;
  border-top: 1px solid #f3ded9;
}

/* --- Transición --- */
.calc__loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 74px 24px;
  min-height: 300px;
}

.spinner {
  width: 34px; height: 34px;
  border: 3px solid var(--line);
  border-top-color: var(--sky);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.calc__loading-text {
  margin: 0;
  font-family: var(--font-title);
  font-size: 1.02rem;
  font-weight: 500;
  color: var(--muted);
}

/* ---------------------------------------------------------------------------
   8. RESULTADO
   ------------------------------------------------------------------------ */
.result {
  padding: 26px 24px 28px;
  scroll-margin-top: calc(var(--header-h) + 16px);
}
.result:focus { outline: none; }

.result__eyebrow {
  margin: 0 0 4px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted-2);
}

.result__headline {
  font-family: var(--font-title);
  font-size: 1.35rem;
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin: 0 0 4px;
}

.result__headline strong {
  display: block;
  width: fit-content;
  font-size: clamp(2.5rem, 10vw, 3.4rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.035em;
  color: var(--ink);
  /* Subrayado azul bajo la cifra, sin tocar el contraste del texto. */
  box-shadow: inset 0 -0.14em 0 var(--sky);
}

.result__sub {
  margin: 0 0 22px;
  font-size: 0.94rem;
  color: var(--muted);
}

/* Indicador gasto actual → gasto optimizado */
.gauge { margin-bottom: 22px; }

.gauge__track {
  height: 14px;
  border-radius: var(--radius-pill);
  /* El tramo visible a la derecha representa el ahorro estimado. */
  background: var(--sky);
  border: 1px solid var(--line);
  overflow: hidden;
}

.gauge__fill {
  display: block;
  height: 100%;
  background: var(--ink-2);
  border-radius: var(--radius-pill);
  width: 100%;
  transition: width 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.gauge__labels {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 7px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted-2);
}

.gauge__labels span:last-child { color: var(--sky-text); }

/* Totales */
.result__totals {
  margin: 0 0 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.result__totals > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
}

.result__totals > div:last-child { border-bottom: 0; }

.result__totals dt { font-size: 0.87rem; color: var(--muted); }

.result__totals dd {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 1rem;
  white-space: nowrap;
}

.result__totals .is-highlight { background: var(--green-soft); }
.result__totals .is-highlight dt { color: #0b6b42; font-weight: 600; }
.result__totals .is-highlight dd { color: var(--green); font-size: 1.12rem; }

/* Desglose por suministro */
.result__breakdown {
  display: grid;
  gap: 12px;
  margin-bottom: 18px;
}

@media (min-width: 460px) {
  .result__breakdown:has(article:not([hidden]) ~ article:not([hidden])) {
    grid-template-columns: 1fr 1fr;
  }
}

.result__card {
  padding: 15px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-alt);
}

.result__card h3 {
  margin: 0 0 8px;
  font-size: 0.94rem;
  display: flex;
  align-items: center;
  gap: 7px;
}

.result__line {
  margin: 0 0 3px;
  font-size: 0.83rem;
  color: var(--muted);
}
.result__line:last-child { margin-bottom: 0; }
.result__line strong { color: var(--ink); font-weight: 600; white-space: nowrap; }
.result__line--save strong { color: var(--green); }

.result__range {
  margin: 0 0 16px;
  font-size: 0.83rem;
  color: var(--muted);
}

.disclaimer {
  margin: 0 0 22px;
  padding: 14px 16px;
  border-left: 3px solid var(--line-strong);
  background: var(--bg-alt);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.77rem;
  line-height: 1.6;
  color: var(--muted);
}

.result__cta { display: grid; gap: 10px; margin-bottom: 24px; }

.upsell-invoice {
  padding: 18px 18px 16px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  background: var(--sky-tint);
  margin-bottom: 8px;
}

.upsell-invoice h3 { margin: 0 0 6px; font-size: 0.98rem; }

.upsell-invoice p {
  margin: 0 0 8px;
  font-size: 0.84rem;
  color: var(--muted);
}

.upsell-invoice__contact { font-size: 0.84rem; }
.upsell-invoice__contact a {
  color: var(--ink);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ---------------------------------------------------------------------------
   9. SECCIONES DE CONTENIDO
   ------------------------------------------------------------------------ */
.grid-2 { display: grid; gap: 34px; align-items: start; }

@media (min-width: 900px) {
  .grid-2 { grid-template-columns: 1fr 1fr; gap: 56px; }
  .grid-2--text { align-items: center; }
}

.grid-2 > div > p { color: var(--muted); max-width: 56ch; }
.grid-2 .btn { margin-top: 8px; }

/* Cómo funciona */
.steps-list {
  display: grid;
  gap: 26px;
  counter-reset: step;
}

@media (min-width: 780px) {
  .steps-list { grid-template-columns: repeat(3, 1fr); gap: 34px; }
}

.steps-list li {
  padding-top: 20px;
  border-top: 2px solid var(--line);
}

.steps-list__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  margin-bottom: 12px;
  border-radius: 50%;
  background: var(--sky-soft);
  color: var(--sky-text);
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 0.95rem;
}

.steps-list h3 { margin-bottom: 6px; font-size: 1.05rem; }
.steps-list p { color: var(--muted); font-size: 0.93rem; margin: 0; }

/* Motivos */
.reason-list { display: grid; gap: 20px; }

.reason-list li {
  padding-left: 18px;
  border-left: 2px solid var(--sky);
}

.reason-list h3 { margin-bottom: 4px; font-size: 1rem; }
.reason-list p { margin: 0; font-size: 0.91rem; color: var(--muted); }

/* Tarjeta de contenido */
.fact-card {
  padding: 26px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.fact-card h3 { margin-bottom: 14px; font-size: 1.06rem; }

.tick-list { display: grid; gap: 10px; margin-bottom: 22px; }

.tick-list li {
  position: relative;
  padding-left: 27px;
  font-size: 0.9rem;
  color: var(--muted);
}

.tick-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.44em;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--sky-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%230369a1'%3E%3Cpath d='M8.2 13.6 4.9 10.3l1.2-1.2 2.1 2.1 5-5 1.2 1.2z'/%3E%3C/svg%3E") center/14px no-repeat;
}

/* Beneficios */
.benefit-grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; }

@media (min-width: 640px) { .benefit-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 980px) { .benefit-grid { grid-template-columns: repeat(3, 1fr); } }

.benefit { background: #fff; padding: 24px 22px; }
.benefit h3 { margin-bottom: 6px; font-size: 1rem; }
.benefit p { margin: 0; font-size: 0.9rem; color: var(--muted); }

/* FAQ */
.faq { border-top: 1px solid var(--line-strong); }

.faq details { border-bottom: 1px solid var(--line-strong); }

.faq summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  flex: 1;
  line-height: 1.45;
}

.faq summary::after {
  content: "";
  flex-shrink: 0;
  width: 22px; height: 22px;
  margin-top: 2px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%235c6070'%3E%3Cpath d='M5.5 7.5 10 12l4.5-4.5z'/%3E%3C/svg%3E") center/22px no-repeat;
  transition: transform 0.2s ease;
}

.faq details[open] summary::after { transform: rotate(180deg); }

.faq details p {
  margin: 0;
  padding: 0 44px 20px 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.faq details p a { color: var(--ink); text-decoration: underline; text-underline-offset: 2px; }

.faq summary:focus-visible { outline: 3px solid var(--sky); outline-offset: -3px; }

/* CTA final */
.cta-final {
  padding: 72px 0;
  background: linear-gradient(140deg, #1f1f23, #121214);
  color: #fff;
  text-align: center;
}

.cta-final h2 { color: #fff; }

.cta-final p {
  color: rgba(255, 255, 255, 0.72);
  max-width: 52ch;
  margin-inline: auto;
  margin-bottom: 1.9rem;
}

.cta-final__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* ---------------------------------------------------------------------------
   10. FOOTER
   ------------------------------------------------------------------------ */
.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
  padding: 52px 0 26px;
  font-size: 0.9rem;
}

.site-footer__grid { display: grid; gap: 32px; }

@media (min-width: 640px) { .site-footer__grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 980px) { .site-footer__grid { grid-template-columns: 1.5fr 1fr 1.2fr 1fr; gap: 40px; } }

.brand--footer { margin-bottom: 12px; }

.site-footer__desc { color: var(--muted); font-size: 0.87rem; max-width: 40ch; }

.site-footer__title {
  font-family: var(--font-title);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 12px;
}

.site-footer__list { display: grid; gap: 9px; color: var(--muted); font-size: 0.87rem; }

.site-footer__list a { transition: color 0.16s ease; }
.site-footer__list a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }

.site-footer__bottom {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.site-footer__bottom p {
  margin: 0;
  font-size: 0.78rem;
  color: var(--muted-2);
}

/* ---------------------------------------------------------------------------
   11. AJUSTES DE PANTALLAS MUY PEQUEÑAS (320 px)
   ------------------------------------------------------------------------ */
/* En pantallas estrechas el CTA de cabecera se parte en dos líneas y compite
   con el logo. La calculadora está inmediatamente debajo, así que sobra. */
@media (max-width: 420px) {
  .site-header__cta { display: none; }
  .site-header__inner { justify-content: space-between; }
  .calc__head { flex-direction: column; align-items: flex-start; gap: 2px; }
}

@media (max-width: 360px) {
  .wrap { padding-inline: 16px; }
  .calc__head, .calc__body, .result { padding-left: 18px; padding-right: 18px; }
  .calc__progress { margin-inline: 18px; }
  .choice-grid { grid-template-columns: 1fr; }
  .choice--wide { grid-column: auto; }
  .chip { font-size: 0.8rem; padding: 9px 12px; }
  .result__totals > div { flex-direction: column; align-items: flex-start; gap: 2px; }
}