/* ===========================================================================
   Sistema de diseño — utilidades-web-monetizadas
   Un solo archivo referenciado por TODAS las páginas del sitio.

   DIRECCIÓN DE DISEÑO — "caja de herramientas de escritorio"
   El sitio entrega utilidades pequeñas y precisas, como cajones etiquetados
   de una caja de herramientas: cada herramienta lleva una "etiqueta de
   cajón" (código monoespaciado + franja de color) en vez de un ícono
   genérico. Ver references/04-diseno-visual.md para la explicación completa
   y cómo extender esto a herramientas nuevas.
   =========================================================================== */

:root {
  /* Papel frío (no el beige/crema genérico) + tinta */
  --paper: #F3F5F4;
  --panel: #FFFFFF;
  --ink: #12182B;
  --ink-soft: #535E70;
  --ink-faint: #8A93A3;

  /* Un solo acento "sello" (rojo tinta) para acción/foco,
     un segundo acento "gratis/OK" (verde bosque) para estados positivos */
  --accent: #C1121F;
  --accent-ink: #ffffff;
  --ok: #0B6E4F;

  --line: #DBDFDD;
  --line-strong: #C3C9C6;
  --ad-bg: #FAFBFA;
  --ad-border: #CBD1CE;

  --radius: 3px;
  --shadow: 0 1px 2px rgba(18, 24, 43, 0.06), 0 6px 16px rgba(18, 24, 43, 0.06);

  /* Un solo webfont externo, solo para titulares (2 pesos) — el cuerpo y los
     datos usan pilas de sistema para no pagar costo de red en el texto
     que más se lee. Ver "por qué" en references/04-diseno-visual.md */
  --font-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "IBM Plex Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --max-width: 1080px;
}

* { box-sizing: border-box; }

@media (prefers-reduced-motion: no-preference) {
  .tool-card, .btn { transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease; }
}

html { background: var(--paper); }

body {
  margin: 0;
  font-family: var(--font-body);
  background:
    linear-gradient(90deg, rgba(18,24,43,0.035) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(rgba(18,24,43,0.035) 1px, transparent 1px) 0 0 / 24px 24px,
    var(--paper);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1.15;
}

a { color: var(--ink); }

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header: franja "regla" con marcas, como el borde de una caja de herramientas ---------- */
.site-header {
  background: var(--ink);
  border-bottom: 4px solid var(--accent);
  padding: 0;
  background-image: repeating-linear-gradient(
    90deg, rgba(255,255,255,0.06) 0 1px, transparent 1px 28px
  );
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px; padding-bottom: 14px;
}
.site-header__logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
  color: #fff;
  letter-spacing: -0.01em;
  display: inline-flex; align-items: center; gap: 8px;
}
.site-header__logo::before {
  content: "";
  width: 10px; height: 10px;
  background: var(--accent);
  display: inline-block;
}
.site-header__nav a {
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  margin-left: 22px;
  font-size: 0.88rem;
  font-family: var(--font-mono);
}
.site-header__nav a:hover { color: #fff; }

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 56px;
  padding: 28px 0;
  color: var(--ink-soft);
  font-size: 0.85rem;
}
.site-footer a { color: var(--ink-soft); }
.site-footer__links a { margin-right: 16px; }

/* ---------- Divisor "regla" — elemento de firma, se usa entre secciones ---------- */
.ruler-divider {
  height: 1px;
  margin: 40px 0;
  background-image: repeating-linear-gradient(
    90deg, var(--line-strong) 0 1px, transparent 1px 16px
  );
  border: none;
}

/* ---------- Badge tipo "sello" ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ok);
  border: 1px solid var(--ok);
  padding: 3px 8px;
  border-radius: 999px;
}
.badge::before { content: "●"; font-size: 0.55rem; }

/* ---------- Hero ---------- */
.tool-page__hero { padding: 36px 0 8px; }
.tool-page__hero h1 { margin: 10px 0 8px; font-size: clamp(1.5rem, 1.1rem + 1.6vw, 2.1rem); }
.tool-page__hero p { color: var(--ink-soft); margin: 0; max-width: 60ch; }

/* ---------- Tarjetas de herramientas — "etiqueta de cajón" ---------- */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin: 28px 0;
}
.tool-card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--ink);
  border-radius: var(--radius);
  padding: 20px 20px 18px;
  text-decoration: none;
  color: inherit;
  display: block;
}
.tool-card:hover {
  border-top-color: var(--accent);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.tool-card__code {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-faint);
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 10px;
}
.tool-card__icon { font-size: 1.5rem; line-height: 1; }
.tool-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  margin: 10px 0 4px;
  font-size: 1.02rem;
}
.tool-card__desc { color: var(--ink-soft); font-size: 0.88rem; margin: 0; }
.tool-card--soon {
  border-top-style: dashed;
  border-top-color: var(--line-strong);
  cursor: default;
}
.tool-card--soon:hover { transform: none; box-shadow: none; border-top-color: var(--line-strong); }
.tool-card__badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  border: 1px dashed var(--line-strong);
  padding: 2px 7px;
  border-radius: 999px;
  margin-bottom: 8px;
}

/* ---------- Panel de herramienta (el "cuerpo" de cada utilidad) ---------- */
.tool-panel {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px 24px;
  margin: 20px 0;
}
.tool-panel::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--ink);
}
.tool-panel h2 { font-size: 1.1rem; }

/* ---------- Botones ---------- */
.btn {
  display: inline-block;
  background: var(--ink);
  color: #fff;
  border: none;
  padding: 11px 20px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  font-family: var(--font-body);
}
.btn:hover { background: var(--accent); }
.btn--secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line-strong);
}
.btn--secondary:hover { background: var(--panel); border-color: var(--ink); }

/* ---------- FAQ ---------- */
details {
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
}
details:first-of-type { border-top: 1px solid var(--line); }
summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  list-style: none;
  display: flex; align-items: center; gap: 8px;
}
summary::before {
  content: "+";
  font-family: var(--font-mono);
  color: var(--accent);
  font-weight: 700;
  width: 1em;
}
details[open] summary::before { content: "–"; }
details p { color: var(--ink-soft); margin: 8px 0 0 1.5em; font-size: 0.92rem; }

/* ---------- Ad slots ---------- */
.ad-slot {
  position: relative;
  background: var(--ad-bg);
  border: 1px dashed var(--ad-border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 28px auto;
  overflow: hidden;
}
.ad-slot__label {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  top: 6px;
}
.ad-slot--leaderboard { width: 100%; max-width: 728px; min-height: 90px; }
.ad-slot--rectangle { width: 300px; min-height: 250px; }
.ad-slot--halfpage { width: 300px; min-height: 600px; }
@media (max-width: 640px) {
  .ad-slot--leaderboard { max-width: 320px; min-height: 50px; }
  .ad-slot--halfpage { display: none; }
}

/* ---------- Banner de cookies ---------- */
.cookie-banner {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--ink);
  color: #fff;
  padding: 14px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  z-index: 1000;
  font-size: 0.85rem;
  border-top: 3px solid var(--accent);
}
.cookie-banner a { color: #fff; text-decoration: underline; }
.cookie-banner__actions { display: flex; gap: 8px; }
.cookie-banner .btn { padding: 8px 14px; font-size: 0.85rem; }

/* ---------- Utilidades de impresión (para herramientas imprimibles) ---------- */
@media print {
  .site-header, .site-footer, .ad-slot, .cookie-banner, .no-print { display: none !important; }
  body { background: #fff; }
}