/* Paleta: papel frío, tinta, azul señal y amarillo marcador. Modo oscuro automático. */
:root {
  --paper: #f3f5f7;
  --surface: #ffffff;
  --ink: #1a2230;
  --muted: #5b6676;
  --line: #d5dbe3;
  --accent: #2158d9;
  --accent-ink: #ffffff;
  --marker: #ffd84a;
  --radius: 10px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #161b22;
    --surface: #1d232c;
    --ink: #e8edf3;
    --muted: #9aa6b6;
    --line: #313a46;
    --accent: #6c97ff;
    --accent-ink: #0f1620;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 16px/1.55 var(--font);
}
a { color: var(--accent); }
h1, h2 { line-height: 1.15; letter-spacing: -0.015em; font-weight: 700; }
.wrap { width: min(1080px, 100% - 2rem); margin-inline: auto; }
.muted { color: var(--muted); }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 1rem; top: 1rem; background: var(--marker); color: #000; padding: .4rem .7rem; z-index: 50; }
:focus-visible { outline: 3px solid var(--marker); outline-offset: 2px; }

/* Cabecera */
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); }
.bar { display: flex; align-items: center; gap: 1rem; padding-block: .7rem; flex-wrap: wrap; }
.brand { font-weight: 800; font-size: 1.2rem; color: var(--ink); text-decoration: none; letter-spacing: -0.02em; }
.cats { display: flex; gap: .25rem; flex: 1; flex-wrap: wrap; }
.cats a { color: var(--ink); text-decoration: none; padding: .3rem .65rem; border-radius: 6px; }
.cats a:hover { background: var(--paper); }
.btn-search {
  display: inline-flex; align-items: center; gap: .6rem; cursor: pointer;
  background: var(--paper); color: var(--muted); border: 1px solid var(--line);
  border-radius: 8px; padding: .35rem .6rem; font: inherit;
}
kbd { font: .75rem var(--mono); border: 1px solid var(--line); border-radius: 4px; padding: 0 .35rem; background: var(--surface); }
.langs { display: flex; gap: .15rem; }
.langs a { color: var(--muted); text-decoration: none; padding: .25rem .5rem; border-radius: 6px; font-weight: 600; }
.langs a[aria-current] { background: var(--marker); color: #1a2230; }

/* Portada: papel cuadriculado que se desvanece */
.hero {
  margin-top: 1.5rem; padding: 2.5rem 1.5rem 2rem; border: 1px solid var(--line); border-radius: var(--radius);
  background:
    linear-gradient(to bottom, transparent 40%, var(--surface) 100%),
    linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 24px 24px,
    var(--surface);
}
.hero h1 { margin: 0 0 .5rem; font-size: clamp(1.7rem, 4.5vw, 2.8rem); max-width: 22ch; }
.hero p { margin: 0; color: var(--muted); max-width: 60ch; }
.hero-small { padding-block: 1.6rem 1.3rem; }
.hero-small h1 { font-size: clamp(1.5rem, 3.5vw, 2.1rem); }
.section-title { margin: 2.2rem 0 .8rem; font-size: 1.3rem; }
.crumbs { margin-top: 1.2rem; font-size: .9rem; color: var(--muted); }
.crumbs a { color: var(--muted); }

/* Tarjetas */
.grid { display: grid; gap: .8rem; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.card {
  display: flex; flex-direction: column; gap: .3rem; padding: 1rem; text-decoration: none; color: var(--ink);
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
}
.card:hover { border-color: var(--accent); }
.card .muted { font-size: .9rem; }
.glyph {
  display: inline-grid; place-items: center; min-width: 2.2rem; height: 2.2rem; padding-inline: .4rem; margin-bottom: .3rem;
  background: var(--marker); color: #1a2230; border-radius: 6px; font: 700 .95rem var(--mono); width: fit-content;
}

/* Panel de herramienta */
.tool-panel { margin-top: 1rem; padding: 1.2rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.tool label { display: block; font-weight: 600; margin: .8rem 0 .3rem; }
.tool textarea, .tool input[type=text], .tool input[type=number], .tool select {
  width: 100%; padding: .6rem .7rem; font: inherit; color: var(--ink);
  background: var(--paper); border: 1px solid var(--line); border-radius: 8px;
}
.tool textarea { min-height: 9rem; resize: vertical; font-family: var(--mono); font-size: .95rem; }
.tool .row { display: flex; gap: .6rem; flex-wrap: wrap; align-items: end; margin-top: .8rem; }
.tool .row > * { flex: 1 1 140px; }
.tool .row .check { flex: 0 0 auto; display: flex; align-items: center; gap: .4rem; font-weight: 400; margin: 0; }
button, .btn {
  font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; display: inline-block; text-align: center;
  padding: .55rem 1rem; border-radius: 8px; border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink);
}
button.ghost { background: transparent; color: var(--accent); }
.tool .row button { flex: 0 0 auto; }
.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: .6rem; margin: 1rem 0 0; }
.stats div { padding: .7rem; background: var(--paper); border-radius: 8px; }
.stats dt { color: var(--muted); font-size: .85rem; }
.stats dd { margin: 0; font: 700 1.5rem var(--mono); }
.result { margin-top: 1rem; padding: .9rem 1rem; background: var(--paper); border-left: 4px solid var(--marker); border-radius: 6px; font: 600 1.15rem var(--mono); min-height: 1.5em; }
.calc { padding-block: .8rem; border-bottom: 1px solid var(--line); }
.calc:last-child { border-bottom: 0; }

/* FAQ */
.faq { margin-top: 2rem; }
.faq summary { cursor: pointer; font-weight: 600; padding: .5rem 0; }
.faq p { margin: 0 0 .8rem; color: var(--muted); max-width: 70ch; }

/* Anuncios: altura reservada para no provocar saltos de maquetación */
.ad { margin: 1.2rem 0; min-height: 100px; }
.ad-placeholder { display: grid; place-items: center; border: 2px dashed var(--line); color: var(--muted); font: .85rem var(--mono); }

/* Buscador (Ctrl+K) */
dialog#search { width: min(560px, 100% - 2rem); margin-top: 10vh; padding: 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); color: var(--ink); }
dialog#search::backdrop { background: rgb(10 15 22 / .55); }
.search-box { display: flex; gap: .5rem; padding: .8rem; border-bottom: 1px solid var(--line); }
.search-box input { flex: 1; padding: .6rem .7rem; font: inherit; color: var(--ink); background: var(--paper); border: 1px solid var(--line); border-radius: 8px; }
.btn-close { background: transparent; color: var(--muted); border-color: var(--line); }
.results { list-style: none; margin: 0; padding: .4rem; max-height: 50vh; overflow: auto; }
.results a { display: block; padding: .55rem .7rem; border-radius: 8px; color: var(--ink); text-decoration: none; }
.results a:hover, .results a.on { background: var(--paper); }
.results small { display: block; color: var(--muted); }
.results .none { padding: .8rem; color: var(--muted); }

/* Consentimiento */
.consent { position: fixed; inset: auto 1rem 1rem 1rem; z-index: 40; max-width: 640px; margin-inline: auto; display: flex; gap: 1rem; align-items: center; justify-content: space-between; flex-wrap: wrap; padding: .9rem 1rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 6px 24px rgb(0 0 0 / .18); }
.consent[hidden] { display: none; }
.consent p { margin: 0; flex: 1 1 260px; font-size: .92rem; }
.consent div { display: flex; gap: .5rem; }

.site-footer { margin-top: 3rem; padding-block: 1.5rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; animation: none !important; } }

/* Separación entre el hero y la primera rejilla (vistas de categoría) */
.grid-first { margin-top: 1.5rem; }

/* Botones pequeños pegar / borrar sobre las cajas de entrada */
.field-head { display: flex; justify-content: space-between; align-items: flex-end; gap: .5rem; margin: .8rem 0 .3rem; }
.field-head label { margin: 0; }
.field-actions { display: flex; gap: .35rem; }
.field-actions:not(.in-head) { justify-content: flex-end; margin: .8rem 0 .3rem; }
.mini { padding: .15rem .6rem; font-size: .82rem; font-weight: 600; border-radius: 6px; background: transparent; color: var(--muted); border: 1px solid var(--line); }
.mini:hover:not(:disabled) { color: var(--ink); border-color: var(--accent); }
.mini:disabled { opacity: .4; cursor: default; }