/* Calculeo — sistema de diseño moderno, geométrico */
:root {
  --paper: #f5f6fb;
  --paper-2: #eceefc;
  --ink: #14162b;
  --ink-soft: #5b5f78;
  --accent: #5b5bf0;      /* índigo vivo */
  --accent-ink: #3230b0;
  --amber: #14b8a6;       /* teal, segundo acento (sustituye al ámbar editorial) */
  --line: #e1e3f3;
  --bad: #e0405a;         /* rosa-rojo vivo, para el semáforo */
  --radius: 18px;
  --font-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-body: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --space: clamp(3rem, 2rem + 4vw, 6rem);
}
* { box-sizing: border-box; margin: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  font-size: 1.0625rem;
}
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 1.25rem; }

/* Header */
header.site {
  border-bottom: 1px solid var(--line);
  background: rgba(245,246,251,.85);
  backdrop-filter: blur(10px);
  position: sticky; top: 0; z-index: 50;
}
header.site .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { font-family: var(--font-display); font-weight: 700; font-size: 1.4rem; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.logo em { color: var(--accent); font-style: normal; }
nav.main a {
  color: var(--ink-soft); text-decoration: none; font-size: .92rem; font-weight: 500; margin-left: 1.4rem;
  border-bottom: 2px solid transparent; padding-bottom: 2px; transition: color .15s, border-color .15s;
}
nav.main a:hover, nav.main a[aria-current="page"] { color: var(--ink); border-color: var(--accent); }

/* Hero */
.hero { padding: var(--space) 0 calc(var(--space) * .7); }
.hero .kicker {
  display: inline-block; color: var(--accent-ink); font-weight: 700; text-transform: uppercase;
  letter-spacing: .1em; font-size: .76rem; background: rgba(91,91,240,.1); padding: .35rem .7rem; border-radius: 999px;
}
.hero h1 {
  font-family: var(--font-display); font-weight: 700; letter-spacing: -0.02em;
  font-size: clamp(2.2rem, 1.3rem + 4.2vw, 4.1rem); line-height: 1.05; margin: .9rem 0 1rem; max-width: 18ch;
}
.hero p.lead { color: var(--ink-soft); max-width: 52ch; font-size: 1.13rem; }

/* Grid de calculadoras */
.calc-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.1rem; padding-bottom: var(--space); }
.calc-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.6rem 1.5rem; text-decoration: none; color: var(--ink);
  display: flex; flex-direction: column; gap: .55rem; position: relative; overflow: hidden;
  transition: transform .2s cubic-bezier(.16,1,.3,1), box-shadow .2s, border-color .2s;
}
.calc-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--amber));
  transform: scaleX(0); transform-origin: left; transition: transform .25s cubic-bezier(.16,1,.3,1);
}
.calc-card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px -22px rgba(20,22,43,.25); border-color: #cfd3f2; }
.calc-card:hover::before { transform: scaleX(1); }
.calc-card .n { font-size: .78rem; color: var(--accent); font-weight: 800; letter-spacing: .08em; font-family: var(--font-display); }
.calc-card h2 { font-family: var(--font-display); font-size: 1.28rem; font-weight: 700; letter-spacing: -0.01em; }
.calc-card p { color: var(--ink-soft); font-size: .93rem; }

/* Página de calculadora */
.calc-page { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 2.5rem; padding: calc(var(--space) * .6) 0 var(--space); }
@media (max-width: 900px) { .calc-page { grid-template-columns: 1fr; } }
.calc-page h1 { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.02em; font-size: clamp(1.9rem, 1.3rem + 2.6vw, 2.9rem); line-height: 1.1; margin-bottom: .4rem; }
.calc-page .sub { color: var(--ink-soft); margin-bottom: 1.8rem; max-width: 60ch; }

.calc-box { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1.85rem; box-shadow: 0 16px 40px -28px rgba(20,22,43,.35); }
.field { margin-bottom: 1.1rem; }
.field label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: .35rem; }
.field input, .field select {
  width: 100%; padding: .72rem .9rem; font-size: 1.05rem; font-family: var(--font-body);
  border: 1.5px solid var(--line); border-radius: 12px; background: var(--paper);
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus, .field select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px rgba(91,91,240,.14); }
.field .hint { font-size: .8rem; color: var(--ink-soft); margin-top: .25rem; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 520px) { .row2 { grid-template-columns: 1fr; } }

button.calc {
  width: 100%; padding: .92rem; font-size: 1.03rem; font-weight: 700; cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--accent-ink)); color: #fff; border: none; border-radius: 12px;
  transition: filter .15s, transform .1s; letter-spacing: .01em;
}
button.calc:hover { filter: brightness(1.08); }
button.calc:active { transform: scale(.985); }

.result { margin-top: 1.4rem; padding: 1.4rem; background: var(--paper-2); border-radius: var(--radius); display: none; }
.result.show { display: block; animation: rise .3s cubic-bezier(.16,1,.3,1); }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.result .big { font-family: var(--font-display); font-size: clamp(2rem, 1.5rem + 2.1vw, 2.9rem); font-weight: 700; color: var(--accent-ink); line-height: 1.05; }
.result .big small { font-size: .45em; color: var(--ink-soft); font-weight: 500; }
.result table { width: 100%; margin-top: .9rem; border-collapse: collapse; font-size: .93rem; }
.result td { padding: .4rem 0; border-bottom: 1px dashed var(--line); }
.result td:last-child { text-align: right; font-weight: 700; font-variant-numeric: tabular-nums; }

/* Campos opcionales y bloque plegable "Afinar el cálculo" */
.opt { font-weight: 400; color: var(--ink-soft); font-size: .82em; }
details.afinar { margin: .6rem 0 1.2rem; border: 1px dashed #c6cbf0; border-radius: var(--radius); padding: .2rem .9rem; }
details.afinar summary { cursor: pointer; font-weight: 600; padding: .7rem 0; font-size: .92rem; color: var(--accent-ink); }
details.afinar[open] summary { border-bottom: 1px solid var(--line); margin-bottom: .8rem; }

/* Semáforo del 30-35 % */
.semaforo { margin-top: 1rem; padding: .7rem .9rem; border-radius: 12px; font-size: .88rem; font-weight: 700; }
.semaforo.ok { background: rgba(20,184,166,.13); color: #0e7d70; }
.semaforo.warn { background: rgba(245,166,35,.15); color: #9a6710; }
.semaforo.bad { background: rgba(224,64,90,.13); color: var(--bad); }

/* Barra capital vs intereses */
.bar-chart { display: flex; width: 100%; height: 14px; border-radius: 999px; overflow: hidden; margin-top: 1.2rem; }
.bar-chart .seg.cap { background: var(--accent); }
.bar-chart .seg.int { background: var(--amber); }
.bar-legend { display: flex; gap: 1.2rem; margin-top: .5rem; font-size: .82rem; color: var(--ink-soft); }
.bar-legend .dot { position: relative; padding-left: 1.1rem; }
.bar-legend .dot::before { content: ""; position: absolute; left: 0; top: .3em; width: .7em; height: .7em; border-radius: 50%; }
.bar-legend .dot.cap::before { background: var(--accent); }
.bar-legend .dot.int::before { background: var(--amber); }

/* Aviso de amortización anticipada */
.callout { margin-top: 1.2rem; padding: .9rem 1rem; background: #fff; border-left: 3px solid var(--accent); border-radius: 0 12px 12px 0; font-size: .9rem; }

/* Tabla de amortización plegable */
.amort-detail { margin-top: 1.3rem; }
.amort-detail summary { cursor: pointer; font-weight: 600; color: var(--accent-ink); font-size: .88rem; }
.amort-table { overflow-x: auto; margin-top: .8rem; }
.amort-table table { width: 100%; border-collapse: collapse; font-size: .82rem; min-width: 420px; }
.amort-table th { text-align: right; padding: .4rem .5rem; border-bottom: 2px solid var(--line); font-size: .78rem; color: var(--ink-soft); }
.amort-table th:first-child, .amort-table td:first-child { text-align: left; }
.amort-table td { padding: .35rem .5rem; text-align: right; border-bottom: 1px dashed var(--line); font-variant-numeric: tabular-nums; }

/* Compartir resultado */
.share-row { display: flex; gap: .6rem; margin-top: 1.3rem; flex-wrap: wrap; }
.btn-share { font-size: .85rem; padding: .55rem .95rem; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--ink); cursor: pointer; text-decoration: none; font-weight: 600; }
.btn-share.wa { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-share:hover { border-color: var(--accent); }

/* Checkboxes dentro de campos opcionales (IVA: retención IRPF, recargo de equivalencia) */
.field.check { display: flex; align-items: center; gap: .55rem; margin-bottom: .9rem; }
.field.check input[type="checkbox"] { width: auto; height: 1.1rem; accent-color: var(--accent); flex-shrink: 0; }
.field.check label { margin-bottom: 0; font-weight: 500; font-size: .9rem; cursor: pointer; }

/* Contenido editorial */
.article { margin-top: 2.6rem; max-width: 68ch; }
.article h2 { font-family: var(--font-display); font-weight: 700; font-size: 1.48rem; margin: 1.8rem 0 .6rem; letter-spacing: -0.01em; }
.article p, .article li { color: #35374f; }
.article ul { padding-left: 1.2rem; }
.disclaimer { margin-top: 2rem; font-size: .82rem; color: var(--ink-soft); border-left: 3px solid var(--amber); padding-left: .9rem; }

/* Sidebar y anuncios */
aside.rail { display: flex; flex-direction: column; gap: 1.2rem; }
.ad-slot {
  min-height: 250px; border: 1.5px dashed #c6cbf0; border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  color: #9a9fc4; font-size: .78rem; letter-spacing: .12em; text-transform: uppercase;
  background: var(--paper-2);
}
.ad-slot.h { min-height: 110px; margin: 2rem 0; }
.related { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1.3rem 1.4rem; }
.related h3 { font-family: var(--font-display); font-size: 1.1rem; margin-bottom: .7rem; font-weight: 700; }
.related a { display: block; color: var(--accent-ink); text-decoration: none; padding: .35rem 0; font-size: .92rem; border-bottom: 1px dashed var(--line); font-weight: 500; }
.related a:last-child { border-bottom: none; }
.related a:hover { color: var(--accent); }

/* Footer */
footer.site { border-top: 1px solid var(--line); background: var(--paper-2); padding: 2.4rem 0; margin-top: var(--space); }
footer.site .wrap { display: flex; flex-wrap: wrap; gap: 1.5rem; justify-content: space-between; align-items: center; }
footer.site nav a { color: var(--ink-soft); text-decoration: none; font-size: .85rem; margin-right: 1.2rem; font-weight: 500; }
footer.site nav a:hover { color: var(--ink); }
footer.site .cc { color: var(--ink-soft); font-size: .85rem; }

/* Banner de consentimiento */
#consent {
  position: fixed; inset: auto 1rem 1rem 1rem; z-index: 100; max-width: 560px; margin: 0 auto;
  background: var(--ink); color: var(--paper); border-radius: var(--radius);
  padding: 1.2rem 1.4rem; box-shadow: 0 24px 60px -14px rgba(20,22,43,.55); display: none;
}
#consent.show { display: block; animation: rise .35s cubic-bezier(.16,1,.3,1); }
#consent p { font-size: .88rem; line-height: 1.5; margin-bottom: .8rem; }
#consent a { color: #8f8ff5; }
#consent .btns { display: flex; gap: .6rem; }
#consent button { flex: 1; padding: .65rem; border-radius: 10px; border: none; cursor: pointer; font-weight: 700; font-size: .9rem; }
#consent .ok { background: var(--accent); color: #fff; }
#consent .no { background: transparent; color: var(--paper); border: 1px solid rgba(245,246,251,.3); }

/* Página legal */
.legal { max-width: 68ch; padding: calc(var(--space) * .6) 0 var(--space); }
.legal h1 { font-family: var(--font-display); font-size: 2.3rem; font-weight: 700; margin-bottom: 1rem; }
.legal h2 { font-family: var(--font-display); font-size: 1.32rem; margin: 1.6rem 0 .5rem; font-weight: 700; }
.legal p, .legal li { color: #35374f; font-size: .97rem; }

/* Regla de tres — intercambiar A/C */
.btn-swap {
  margin-top: .4rem; display: inline-block; font-size: .78rem; font-weight: 700;
  color: var(--accent-ink); background: transparent; border: 1px dashed #c6cbf0;
  border-radius: 999px; padding: .3rem .7rem; cursor: pointer;
}
.btn-swap:hover { border-color: var(--accent); }

/* Regla de tres — error de validación */
.r3-error {
  padding: .9rem 1rem; background: rgba(224,64,90,.09); color: var(--bad);
  border-left: 3px solid var(--bad); border-radius: 0 12px 12px 0; font-size: .92rem; font-weight: 600;
}

/* Regla de tres — planteamiento visual */
.r3-diagram { margin-top: 1.2rem; padding: 1rem 1.1rem; background: #fff; border: 1px solid var(--line); border-radius: 14px; }
.r3-row { display: flex; align-items: baseline; gap: .6rem; font-variant-numeric: tabular-nums; font-size: 1.02rem; }
.r3-row + .r3-row { margin-top: .4rem; }
.r3-arrow { color: var(--accent); font-weight: 700; }
.r3-diagram.inversa .r3-arrow { color: var(--bad); }
.r3-val.r3-x { color: var(--accent-ink); font-weight: 700; }
.r3-nota { margin-top: .7rem; font-size: .82rem; color: var(--ink-soft); }

/* Regla de tres — historial de sesión */
.r3-historial { margin-top: 1rem; }
.hist-title { font-size: .8rem; color: var(--ink-soft); margin-bottom: .4rem; text-transform: uppercase; letter-spacing: .06em; }
.hist-list { display: flex; flex-direction: column; gap: .4rem; }
.hist-item {
  text-align: left; font-size: .86rem; padding: .5rem .7rem; border: 1px dashed #c6cbf0;
  border-radius: 10px; background: #fff; cursor: pointer; font-variant-numeric: tabular-nums; color: var(--ink);
}
.hist-item:hover { border-color: var(--accent); color: var(--accent-ink); }

/* Insignia "Mejor oferta" en el comparador de descuento.html */
.badge-mejor {
  display: inline-block; margin-left: .5rem; padding: .15rem .55rem;
  background: linear-gradient(135deg, var(--accent), var(--amber)); color: #fff; font-size: .72rem; font-weight: 700;
  border-radius: 999px; letter-spacing: .04em; text-transform: uppercase; vertical-align: middle;
}

/* Cuenta atrás en vivo (días-entre-fechas) */
.callout.cuenta-atras { font-variant-numeric: tabular-nums; font-weight: 600; }