/* ==========================================================================
   Colección.org — hoja de estilos única
   Sin fuentes externas, sin imágenes: rendimiento 100/100 por diseño.
   ========================================================================== */

:root {
  --bg: #faf7f1;
  --surface: #ffffff;
  --ink: #241f18;
  --muted: #655c4f;
  --line: #e6ddcd;
  --brand: #94470e;
  --brand-strong: #7a3a0b;
  --brand-soft: #f4e7d7;
  --focus: #1d4ed8;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16130e;
    --surface: #1f1a13;
    --ink: #ede5d8;
    --muted: #b0a591;
    --line: #372f22;
    --brand: #e3a35c;
    --brand-strong: #eeb877;
    --brand-soft: #2b2214;
    --focus: #93b4f8;
  }
}

/* --- Base ----------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
}

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 .5em;
  text-wrap: balance;
}

h1 { font-size: clamp(1.9rem, 4.5vw, 2.75rem); }
h2 { font-size: clamp(1.4rem, 3vw, 1.8rem); margin-top: 2.2em; }
h3 { font-size: 1.15rem; margin-top: 1.6em; }

p, ul, ol { margin: 0 0 1em; }

a {
  color: var(--brand);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover { color: var(--brand-strong); }

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

.wrap {
  max-width: 68rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--surface);
  color: var(--ink);
  padding: .6rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: .5rem; top: .5rem; }

/* --- Cabecera ------------------------------------------------------------- */

.site-head {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}

.site-head .bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
  flex-wrap: wrap;
  padding-top: .5rem;
  padding-bottom: .5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
}
.brand em { font-style: normal; color: var(--brand); }
.brand svg { display: block; }

.nav-btn {
  display: none;
  appearance: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: .5rem;
  padding: .45rem .7rem;
  font: inherit;
  color: var(--ink);
  cursor: pointer;
}

.site-nav {
  display: flex;
  gap: 1.35rem;
  flex-wrap: wrap;
}
.site-nav a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
  font-size: .98rem;
  padding: .35rem 0;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--brand);
  border-bottom-color: var(--brand);
}

@media (max-width: 46rem) {
  .nav-btn { display: inline-block; }
  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0;
    padding: .25rem 0 .75rem;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: .55rem 0; border-bottom: 1px solid var(--line); }
  /* Sin JavaScript la navegación queda siempre visible */
  .no-js .site-nav { display: flex; }
  .no-js .nav-btn { display: none; }
}

/* --- Migas de pan --------------------------------------------------------- */

.breadcrumb {
  font-size: .88rem;
  color: var(--muted);
  margin: 1.4rem 0 0;
}
.breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
}
.breadcrumb li + li::before { content: "›"; margin-right: .35rem; }
.breadcrumb a { color: var(--muted); }

/* --- Héroe y secciones ---------------------------------------------------- */

.hero { padding: 3.5rem 0 2.5rem; }
.hero .lead,
.lead {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 46rem;
  text-wrap: pretty;
}

.kicker {
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: .8rem;
}

main { padding-bottom: 3.5rem; }

.section { margin-top: 2.5rem; }

/* --- Tarjetas -------------------------------------------------------------- */

.cards {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15.5rem, 1fr));
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: .75rem;
  padding: 1.15rem 1.25rem;
  position: relative;
  transition: border-color .15s ease;
}
.card:hover { border-color: var(--brand); }

.card h3, .card .card-t {
  font-family: var(--serif);
  font-size: 1.12rem;
  font-weight: 600;
  margin: 0 0 .35rem;
}
.card a {
  color: var(--ink);
  text-decoration: none;
}
/* Toda la tarjeta es clicable */
.card a::after { content: ""; position: absolute; inset: 0; }
.card a:hover { color: var(--brand); }
.card p {
  margin: 0;
  font-size: .93rem;
  color: var(--muted);
}

/* --- Prosa ----------------------------------------------------------------- */

.prose { max-width: 46rem; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose li { margin-bottom: .35em; }

.note {
  background: var(--brand-soft);
  border-left: 4px solid var(--brand);
  border-radius: 0 .5rem .5rem 0;
  padding: .9rem 1.1rem;
  margin: 1.5rem 0;
  font-size: .97rem;
}
.note p:last-child { margin: 0; }

/* --- Listas de definiciones (glosario) ------------------------------------ */

.glossary dt {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.05rem;
  margin-top: 1.1rem;
}
.glossary dd {
  margin: .2rem 0 0;
  color: var(--muted);
  max-width: 44rem;
}

/* --- FAQ -------------------------------------------------------------------- */

.faq details {
  border: 1px solid var(--line);
  border-radius: .6rem;
  background: var(--surface);
  padding: 0 1.1rem;
  margin-bottom: .6rem;
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  padding: .85rem 0;
  list-style-position: outside;
}
.faq details[open] summary { border-bottom: 1px solid var(--line); }
.faq details p { padding: .8rem 0 .2rem; color: var(--muted); }

/* --- Botones ----------------------------------------------------------------- */

.btn {
  display: inline-block;
  background: var(--brand);
  color: var(--bg);
  font-weight: 600;
  text-decoration: none;
  padding: .7rem 1.3rem;
  border-radius: .55rem;
  margin-top: .5rem;
}
.btn:hover { background: var(--brand-strong); color: var(--bg); }

/* --- Pie de página ------------------------------------------------------------ */

.site-foot {
  border-top: 1px solid var(--line);
  background: var(--surface);
  margin-top: 2rem;
  font-size: .92rem;
}

.foot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: 2rem;
  padding-top: 2.5rem;
  padding-bottom: 1.5rem;
}
.foot-grid .foot-brand {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: .4rem;
}
.foot-grid h2 {
  font-family: var(--sans);
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted);
  margin: 0 0 .6rem;
}
.foot-grid ul { list-style: none; margin: 0; padding: 0; }
.foot-grid li { margin-bottom: .35rem; }
.foot-grid a { color: var(--ink); text-decoration: none; }
.foot-grid a:hover { color: var(--brand); text-decoration: underline; }
.foot-grid p { color: var(--muted); }

.foot-legal {
  border-top: 1px solid var(--line);
  padding-top: 1rem;
  padding-bottom: 1.25rem;
  color: var(--muted);
  font-size: .85rem;
}
.foot-legal p { margin: 0; }

/* --- Utilidades ----------------------------------------------------------------- */

.related { margin-top: 3rem; }
.related h2 { font-size: 1.25rem; }

@media print {
  .site-head, .site-foot, .nav-btn { display: none; }
}