/* ============================================================================
   APEXAPRO · styles.css — ÚNICA hoja de estilos del sitio
   ----------------------------------------------------------------------------
   5 capas:
     1) TOKENS ............ variables de diseño (editar SOLO aquí para rediseñar)
     2) RESET / BASE ...... normalización y defaults
     3) LAYOUT ............ contenedores y grillas
     4) COMPONENTES ....... nav, hero, buscador, acordeones, cards, forms, footer
     5) PUBLICIDAD ........ slots con altura reservada (anti-CLS)
   Identidad: "instrumento de precisión" — papel milimetrado, tinta grafito,
   naranja de tecla de calculadora, numerales en monospace.
   ============================================================================ */


/* ════════════════════════════════════════════════════════════════════════
   1. TOKENS
   ════════════════════════════════════════════════════════════════════════ */
:root{
  /* --- Primitivos (paleta cruda) --- */
  --graphite-900:#1b1d21;
  --graphite-600:#5b616c;
  --graphite-400:#9297a1;
  --paper-0:#ffffff;
  --paper-100:#f5f6f4;
  --paper-200:#ebedea;
  --line-200:#e2e4e0;
  --orange-500:#ea5a0b;   /* naranja "tecla de operador" */
  --orange-600:#c64a05;
  --orange-050:#fdeee1;

  /* --- Semánticos (los componentes consumen SOLO estos) --- */
  --bg:            var(--paper-100);
  --surface:       var(--paper-0);
  --surface-2:     var(--paper-200);
  --text:          var(--graphite-900);
  --text-muted:    var(--graphite-600);
  --text-faint:    var(--graphite-400);
  --border:        var(--line-200);
  --border-strong: var(--graphite-900);
  --primary:        var(--orange-500);
  --primary-strong: var(--orange-600);
  --primary-tint:   var(--orange-050);
  --on-primary:    #ffffff;
  --grid-line:     rgba(27,29,33,.055);
  --grid-dot:      rgba(27,29,33,.13);

  /* --- Geometría / sombra / tipografía --- */
  --radius:    10px;
  --radius-sm: 7px;
  --shadow-pop: 6px 6px 0 var(--border-strong);      /* firma visual del sitio */
  --font-sans: system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --font-mono: ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --container: 1080px;

  /* --- Publicidad: reservas de altura anti-CLS (coinciden con la unidad servida) --- */
  --ad-bg: var(--paper-200);
  --ad-h-leaderboard-mobile: 100px;  /* unidad 320×100 */
  --ad-h-leaderboard-desktop: 90px;  /* unidad 728×90  */
  --ad-h-rect:   250px;              /* unidad 300×250 */
  --ad-h-native: 100px;              /* nativo in-article */
}

/* Tema alternativo listo para usar: <html data-theme="dark"> */
[data-theme="dark"]{
  --bg:#111216;
  --surface:#191b20;
  --surface-2:#22242b;
  --text:#eceded;
  --text-muted:#a4a8b0;
  --text-faint:#70747d;
  --border:#2b2d35;
  --border-strong:#eceded;
  --grid-line:rgba(236,237,237,.06);
  --grid-dot:rgba(236,237,237,.14);
  --primary-tint:rgba(234,90,11,.16);
  --ad-bg:#22242b;
}


/* ════════════════════════════════════════════════════════════════════════
   2. RESET / BASE
   ════════════════════════════════════════════════════════════════════════ */
*,*::before,*::after{ box-sizing:border-box; }
*{ margin:0; }
html{ -webkit-text-size-adjust:100%; }
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:1rem;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img,svg{ display:block; max-width:100%; }
a{ color:inherit; }
button{ font:inherit; color:inherit; }
h1,h2,h3,h4{ line-height:1.15; overflow-wrap:break-word; }
[hidden]{ display:none !important; }

/* Fondo de puntos flotantes (canvas, ver js/bg-particles.js) — fijo detrás
   de todo el contenido. z-index:-1 alcanza sin envolver el resto del body,
   porque el resto del contenido no está posicionado (stacking normal). */
#bg-particles{
  position:fixed; inset:0; z-index:-1;
  pointer-events:none;
}

::selection{ background:var(--primary-tint); color:var(--text); }

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

.visually-hidden{
  position:absolute; width:1px; height:1px;
  padding:0; margin:-1px; overflow:hidden;
  clip:rect(0 0 0 0); white-space:nowrap; border:0;
}

.skip-link{
  position:absolute; left:12px; top:-48px; z-index:100;
  background:var(--surface); color:var(--text);
  border:1.5px solid var(--border-strong); border-radius:var(--radius-sm);
  padding:8px 14px; font:600 .85rem var(--font-sans); text-decoration:none;
  transition:top .15s ease;
}
.skip-link:focus{ top:12px; }

.mono{ font-family:var(--font-mono); }
.muted{ color:var(--text-muted); }

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
}


/* ════════════════════════════════════════════════════════════════════════
   3. LAYOUT
   ════════════════════════════════════════════════════════════════════════ */
.container{
  max-width:var(--container);
  margin-inline:auto;
  padding-inline:20px;
}
.section{ padding-block:34px; }

.grid-cards{
  display:grid;
  gap:14px;
  grid-template-columns:repeat(auto-fill, minmax(245px, 1fr));
}


/* ════════════════════════════════════════════════════════════════════════
   4. COMPONENTES
   ════════════════════════════════════════════════════════════════════════ */

/* ── Barra de navegación ── */
.nav{
  position:sticky; top:0; z-index:50;
  background:var(--bg);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  display:flex; align-items:center; justify-content:space-between;
  height:60px;
}
.brand{
  display:flex; align-items:center; gap:9px;
  font-family:var(--font-mono);
  font-weight:700; font-size:1.02rem; letter-spacing:-.02em;
  text-decoration:none;
}
.brand-mark{ display:inline-block; margin-right:2px; }

.lang-switch{
  display:flex; gap:2px;
  border:1px solid var(--border); border-radius:999px;
  background:var(--surface); padding:3px;
  font-family:var(--font-mono); font-size:.78rem;
}
.lang-switch a{
  padding:4px 12px; border-radius:999px;
  text-decoration:none; color:var(--text-muted);
}
.lang-switch a[aria-current="true"]{
  background:var(--text); color:var(--bg); font-weight:700;
}
.lang-switch a:not([aria-current="true"]):hover{ color:var(--text); }

/* ── Hero sobre papel milimetrado (firma del sitio, 0 KB de imágenes) ── */
.hero{
  text-align:center;
  padding:58px 0 48px;
  border-bottom:1px solid var(--border);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size:26px 26px;
}
.kicker{
  display:inline-block;
  font-family:var(--font-mono); font-size:.7rem; font-weight:600;
  letter-spacing:.15em; text-transform:uppercase;
  color:var(--primary-strong);
  background:var(--surface);
  border:1px solid var(--border); border-radius:999px;
  padding:5px 13px; margin-bottom:16px;
}
.hero h1{
  font-size:clamp(1.95rem, 4.6vw, 3.05rem);
  font-weight:800; letter-spacing:-.032em;
  margin-bottom:12px;
}
.hero .lead{
  color:var(--text-muted);
  max-width:580px;
  margin:0 auto 28px;
}

/* ── Buscador local ── */
.search-wrap{ position:relative; max-width:620px; margin-inline:auto; }
.search-input{
  width:100%; height:58px;
  padding:0 54px 0 48px;
  font:1rem var(--font-sans); color:var(--text);
  background:var(--surface);
  border:1.5px solid var(--border-strong);
  border-radius:var(--radius);
}
.search-input::placeholder{ color:var(--text-faint); }
.search-icon{
  position:absolute; left:16px; top:50%; translate:0 -50%;
  width:20px; height:20px; color:var(--text-faint);
  pointer-events:none;
}
.search-kbd{
  position:absolute; right:14px; top:50%; translate:0 -50%;
  font-family:var(--font-mono); font-size:.72rem;
  color:var(--text-faint); background:var(--bg);
  border:1px solid var(--border); border-bottom-width:2px;
  border-radius:6px; padding:2px 8px;
}
@media (hover:none), (max-width:640px){ .search-kbd{ display:none; } }

/* ── Resultados de búsqueda ── */
.results-meta{
  font-family:var(--font-mono); font-size:.78rem;
  color:var(--text-muted); margin-bottom:14px;
}
.no-results{
  grid-column:1 / -1;
  text-align:center; padding:36px 20px;
  background:var(--surface);
  border:1px dashed var(--border); border-radius:var(--radius);
  color:var(--text-muted);
}
.no-results p{ margin-bottom:4px; }

/* ── Acordeones por categoría (details/summary nativo: 0 JS, indexable) ── */
.accordion{
  background:var(--surface);
  border:1px solid var(--border); border-radius:var(--radius);
  margin-bottom:14px;
  overflow:hidden;
}
.accordion summary{
  list-style:none; cursor:pointer; user-select:none;
  display:flex; align-items:center; gap:12px;
  padding:16px 20px;
}
.accordion summary::-webkit-details-marker{ display:none; }
.accordion summary:hover{ background:var(--bg); }
.acc-title{ font-weight:700; font-size:1.02rem; letter-spacing:-.01em; }
.acc-count{
  font-family:var(--font-mono); font-size:.7rem;
  color:var(--text-faint);
  border:1px solid var(--border); border-radius:999px;
  padding:2px 9px;
}
.acc-chevron{
  margin-left:auto; flex:0 0 auto;
  width:9px; height:9px;
  border-right:2px solid var(--text-faint);
  border-bottom:2px solid var(--text-faint);
  transform:rotate(45deg) translate(-1px,-1px);
  transition:transform .18s ease;
}
details[open] .acc-chevron{ transform:rotate(-135deg) translate(-2px,-2px); }
.acc-body{ padding:4px 20px 20px; }

/* ── Tarjeta de herramienta ── */
.card{
  display:flex; align-items:flex-start; gap:14px;
  background:var(--surface);
  border:1px solid var(--border); border-radius:var(--radius);
  padding:16px;
  text-decoration:none; color:inherit;
  transition:transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.card:hover{
  border-color:var(--border-strong);
  transform:translate(-3px,-3px);
  box-shadow:var(--shadow-pop);
}
.card-icon{
  flex:0 0 auto;
  width:42px; height:42px;
  display:grid; place-items:center;
  background:var(--primary-tint);
  color:var(--primary-strong);
  border:1px solid var(--border); border-radius:var(--radius-sm);
}
.card-icon svg{ width:22px; height:22px; }
.card h3{ font-size:.98rem; letter-spacing:-.01em; margin-bottom:4px; }
.card p{ font-size:.85rem; line-height:1.45; color:var(--text-muted); }

/* ── Botones (plantilla de calculadoras) ── */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  height:46px; padding:0 20px;
  font:600 .95rem var(--font-sans);
  background:var(--surface); color:var(--text);
  border:1.5px solid var(--border-strong); border-radius:var(--radius-sm);
  cursor:pointer; text-decoration:none;
  transition:transform .12s ease, box-shadow .12s ease;
}
.btn:hover{ transform:translate(-2px,-2px); box-shadow:4px 4px 0 var(--border-strong); }
.btn:active{ transform:translate(0,0); box-shadow:none; }
.btn--primary{
  background:var(--primary); color:var(--on-primary);
  border-color:var(--primary-strong);
}
.btn--primary:hover{ box-shadow:4px 4px 0 var(--primary-strong); }

/* ── Campos e inputs (plantilla de calculadoras) ── */
.field{ margin-bottom:18px; }
.field > label{
  display:block; margin-bottom:6px;
  font-family:var(--font-mono); font-size:.7rem; font-weight:600;
  letter-spacing:.12em; text-transform:uppercase;
  color:var(--text-muted);
}
.input{
  width:100%; height:48px; padding:0 14px;
  font:1rem var(--font-sans); color:var(--text);
  background:var(--surface);
  border:1.5px solid var(--border); border-radius:var(--radius-sm);
}
.input:focus{ border-color:var(--border-strong); }
.input--num{ font-family:var(--font-mono); }

.range{
  -webkit-appearance:none; appearance:none;
  width:100%; height:6px; border-radius:999px;
  background:var(--surface-2);
  outline-offset:6px;
}
.range::-webkit-slider-thumb{
  -webkit-appearance:none; appearance:none;
  width:22px; height:22px; border-radius:50%;
  background:var(--primary);
  border:2.5px solid var(--surface);
  box-shadow:0 0 0 1.5px var(--primary-strong);
  cursor:pointer;
}
.range::-moz-range-thumb{
  width:22px; height:22px; border-radius:50%;
  background:var(--primary);
  border:2.5px solid var(--surface);
  box-shadow:0 0 0 1.5px var(--primary-strong);
  cursor:pointer;
}

/* ── Footer ── */
.footer{
  margin-top:56px;
  background:var(--surface);
  border-top:1px solid var(--border);
  padding:42px 0 26px;
}
.footer-grid{
  display:grid; gap:30px;
  grid-template-columns:2fr 1fr 1fr;
}
@media (max-width:720px){ .footer-grid{ grid-template-columns:1fr; } }
.footer-blurb{ font-size:.88rem; color:var(--text-muted); max-width:340px; margin-top:10px; }
.footer h4{
  font-family:var(--font-mono); font-size:.7rem; font-weight:600;
  letter-spacing:.13em; text-transform:uppercase;
  color:var(--text-faint);
  margin-bottom:12px;
}
.footer-links a{
  display:block; padding:4px 0;
  font-size:.88rem; color:var(--text-muted); text-decoration:none;
}
.footer-links a:hover{ color:var(--text); }
.footer-bottom{
  margin-top:30px; padding-top:18px;
  border-top:1px solid var(--border);
  display:flex; justify-content:space-between; gap:10px; flex-wrap:wrap;
  font-family:var(--font-mono); font-size:.74rem; color:var(--text-faint);
}


/* ════════════════════════════════════════════════════════════════════════
   5. PUBLICIDAD — reservas fijas anti-CLS
   Regla: el min-height del slot SIEMPRE coincide con la unidad fija servida
   en ese breakpoint. Nunca Auto Ads. Nunca unidades de altura variable.
   ════════════════════════════════════════════════════════════════════════ */
.ad-unit{ margin:28px auto; }
.ad-label{
  display:block; text-align:center;
  font-family:var(--font-mono); font-size:.6rem;
  letter-spacing:.16em; text-transform:uppercase;
  color:var(--text-faint);
  margin-bottom:6px;
}
.ad-slot{
  display:flex; align-items:center; justify-content:center;
  background:var(--ad-bg);
  border:1px dashed var(--border);
  border-radius:var(--radius-sm);
  overflow:hidden;
  color:var(--text-faint);
  font-family:var(--font-mono); font-size:.68rem; letter-spacing:.06em;
}

/* Superior: 320×100 en móvil · 728×90 en desktop */
.ad-slot--leaderboard{
  min-height:var(--ad-h-leaderboard-mobile);
  max-width:728px; margin-inline:auto;
}
@media (min-width:768px){
  .ad-slot--leaderboard{ min-height:var(--ad-h-leaderboard-desktop); }
}

/* Rectángulo medio 300×250 (fin de catálogo / sidebar de calculadoras) */
.ad-slot--rect{
  min-height:var(--ad-h-rect);
  max-width:336px; margin-inline:auto;
}

/* Nativo in-article dentro del bloque SEO */
.ad-slot--native{ min-height:var(--ad-h-native); }


/* ════════════════════════════════════════════════════════════════════════
   6. PLANTILLA DE CALCULADORAS
   Zonas: 1) nav (§4)  2) banner superior (§5)  3) instrucciones (.accordion)
          4) bloque interactivo (.calc-layout)  5) bloque SEO (.article)
   ════════════════════════════════════════════════════════════════════════ */

/* ── Migas de pan ── */
.breadcrumb{
  font-family:var(--font-mono); font-size:.75rem;
  color:var(--text-faint);
  padding:16px 0 0;
}
.breadcrumb a{ color:var(--text-muted); text-decoration:none; }
.breadcrumb a:hover{ color:var(--text); }
.breadcrumb span{ margin:0 6px; }

/* ── Encabezado de herramienta ── */
.tool-head{ padding:14px 0 26px; }
.tool-head h1{
  font-size:clamp(1.6rem, 3.6vw, 2.3rem);
  font-weight:800; letter-spacing:-.028em;
  margin-bottom:8px;
}
.tool-head .lead{ color:var(--text-muted); max-width:640px; }

/* ── Tabs (modos de cálculo) ── */
.tabs{
  display:flex; flex-wrap:wrap; gap:6px;
  margin-bottom:20px;
}
.tab-btn{
  height:38px; padding:0 15px;
  font:600 .83rem var(--font-sans); color:var(--text-muted);
  background:var(--surface);
  border:1.5px solid var(--border); border-radius:999px;
  cursor:pointer;
}
.tab-btn:hover{ border-color:var(--border-strong); color:var(--text); }
.tab-btn.active{
  background:var(--text); color:var(--bg); border-color:var(--text);
}

/* ── Layout interactivo: contenido + rail de anuncio ──
   En mobile el aside queda naturalmente DESPUÉS del bloque (orden del DOM);
   en desktop se acomoda como columna lateral pegajosa. */
.calc-layout{
  display:grid; grid-template-columns:1fr; gap:26px;
  align-items:start;
}
@media (min-width:960px){
  .calc-layout{ grid-template-columns:1fr 300px; }
}
.calc-aside{ }
@media (min-width:960px){
  .calc-aside{ position:sticky; top:76px; }
}

.calc-main{
  background:var(--surface);
  border:1px solid var(--border); border-radius:var(--radius);
  padding:22px;
}

.tabpanel[hidden]{ display:none; }
.tabpanel .field:last-child{ margin-bottom:0; }

/* ── Panel de resultado ── */
.result-panel{
  margin-top:22px; padding:20px;
  background:var(--primary-tint);
  border:1.5px solid var(--primary-strong); border-radius:var(--radius);
}
.result-label{
  display:block;
  font-family:var(--font-mono); font-size:.7rem; font-weight:600;
  letter-spacing:.12em; text-transform:uppercase;
  color:var(--primary-strong); margin-bottom:6px;
}
.result-value{
  font-family:var(--font-mono); font-weight:700;
  font-size:clamp(1.8rem, 5vw, 2.4rem);
  letter-spacing:-.02em; color:var(--text);
  margin-bottom:6px;
}
.calc-note{ font-size:.9rem; color:var(--text-muted); }

/* ── Bloque SEO / artículo ── */
.article{ max-width:720px; }
.article h2{
  font-size:1.28rem; font-weight:800; letter-spacing:-.02em;
  margin:34px 0 12px;
}
.article h2:first-child{ margin-top:0; }
.article p{ margin-bottom:14px; color:var(--text); }
.article ul, .article ol{ margin:0 0 14px 1.2em; }
.article li{ margin-bottom:6px; }
.article .formula{
  font-family:var(--font-mono); font-size:.92rem;
  background:var(--surface-2);
  border:1px solid var(--border); border-radius:var(--radius-sm);
  padding:14px 16px; margin-bottom:14px;
  overflow-x:auto; white-space:pre;
}

/* ── FAQ (reutiliza .accordion) ── */
.faq-list .accordion{ margin-bottom:10px; }
.faq-list summary{ padding:14px 18px; }
.faq-list .acc-body{ padding:0 18px 16px; color:var(--text-muted); font-size:.92rem; }

/* ── Slider + número sincronizado (reutilizable en cualquier calculadora) ── */
.range-row{ display:flex; align-items:center; gap:12px; }
.range-row .range{ flex:1; }
.range-value{
  font-family:var(--font-mono); font-size:.85rem;
  min-width:56px; text-align:right; color:var(--text-muted);
}

/* ── Gráfico inline (SVG generado en JS, sin librerías) ── */
.chart-wrap{ margin-top:24px; }
.chart-legend{
  display:flex; gap:18px;
  font-family:var(--font-mono); font-size:.72rem; color:var(--text-muted);
  margin-bottom:10px;
}
.chart-legend-item{ display:flex; align-items:center; gap:6px; }
.chart-swatch{ width:10px; height:10px; border-radius:2px; display:inline-block; }

/* ── Dados (Dice Roller) ── */
.dice-tray{
  display:flex; flex-wrap:wrap; gap:10px;
  margin:18px 0;
  min-height:60px;
}
.die{
  width:52px; height:52px;
  display:flex; align-items:center; justify-content:center;
  background:var(--surface);
  border:1.5px solid var(--border-strong); border-radius:var(--radius-sm);
  font-family:var(--font-mono); font-weight:700; font-size:1.15rem;
  box-shadow:3px 3px 0 var(--border-strong);
}
.dice-tray.rolling .die{ animation:dice-roll .5s ease; }
@keyframes dice-roll{
  0%{ transform:rotate(0deg) scale(1); }
  30%{ transform:rotate(180deg) scale(1.1); }
  60%{ transform:rotate(360deg) scale(.92); }
  100%{ transform:rotate(720deg) scale(1); }
}
@media (prefers-reduced-motion: reduce){
  .dice-tray.rolling .die{ animation:none; }
}

/* ── Recomendaciones (bloque data-driven, ver js/related.js) ── */
.related-title{
  font-size:1.1rem; font-weight:800; letter-spacing:-.02em;
  margin-bottom:14px;
}
