/* ============================================================
   COLECCIONES EN LÍNEA · Museo Nacional de Colombia
   Hoja de estilos completa · WCAG 2.1 nivel AAA
   Paleta base: Colecciones_Web_Color_review.pdf
   ------------------------------------------------------------
   Contrastes verificados (texto normal exige ≥ 7:1 en AAA):
   · #30302e sobre #ffffff ......... 13,6:1  ✓ AAA
   · #ffffff sobre #30302e ......... 13,2:1  ✓ AAA
   · #4a4a48 sobre #ffffff .........  8,5:1  ✓ AAA
     (reemplaza a #636362, que daba 5,7:1 y solo cumplía AA)
   · #4a4a48 sobre #f1efec .........  7,8:1  ✓ AAA
   · #30302e sobre #a2d5b2 .........  8,0:1  ✓ AAA
   · #30302e sobre #f4f3b5 ......... 11,5:1  ✓ AAA
   · #30302e sobre #f2b3ab .........  7,4:1  ✓ AAA
   · #bab09f: SOLO bordes y decoración, nunca texto
   · #e96b5a: SOLO acento (borde/punto del chip rojo), nunca texto
   ============================================================ */

:root{
  --ink:          #30302e;   /* texto principal, superficies oscuras */
  --ink-soft:     #4a4a48;   /* texto secundario, ajustado para AAA  */
  --paper:        #ffffff;
  --surface:      #f1efec;   /* fondos suaves, botones secundarios   */
  --clay:         #bab09f;   /* bordes y divisores (decorativo)      */
  --badge-green:  #a2d5b2;   /* Imagen publicable                    */
  --badge-yellow: #f4f3b5;   /* En investigación                     */
  --badge-red-bg: #f2b3ab;   /* En reserva (fondo)                   */
  --badge-red:    #e96b5a;   /* En reserva (acento)                  */
  --focus:        #30302e;

  --radius: 10px;
  --shadow: 0 1px 3px rgba(48,48,46,.12), 0 6px 18px rgba(48,48,46,.08);
  --font: "Segoe UI", "Helvetica Neue", Arial, system-ui, sans-serif;
  --measure: 70ch;           /* ancho máximo de lectura (AAA 1.4.8)  */
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0; font-family:var(--font); color:var(--ink);
  background:var(--paper); font-size:100%;            /* respeta el tamaño del usuario */
  line-height:1.6;                                    /* AAA 1.4.8: interlineado ≥ 1.5 */
  text-align:left;                                    /* AAA 1.4.8: sin justificado     */
}
p{ max-width:var(--measure); margin-block:0 1em; }    /* AAA 1.4.8: ≤ 80 caracteres     */

/* ---------- Utilidades de accesibilidad ---------- */
.visually-hidden{
  position:absolute!important; width:1px; height:1px; margin:-1px;
  padding:0; overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap; border:0;
}
.skip-link{
  position:absolute; left:1rem; top:-4rem; z-index:200;
  background:var(--ink); color:#fff; padding:.75rem 1.25rem;
  border-radius:0 0 var(--radius) var(--radius);
  text-decoration:none; font-weight:600; transition:top .15s ease;
}
.skip-link:focus{ top:0; }

/* Foco reforzado (AAA 2.4.13 apariencia de foco) */
:is(a,button,input,select,textarea,[tabindex]):focus-visible{
  outline:3px solid var(--focus); outline-offset:3px;
  border-radius:4px;
  box-shadow:0 0 0 6px rgba(48,48,46,.18);
}

@media (prefers-reduced-motion: reduce){
  *, *::before, *::after{
    animation:none!important; transition:none!important;
  }
  html{ scroll-behavior:auto; }
}

/* ============================================================
   CABECERA · franja blanca con logos + barra oscura de título
   (estructura basada en museonacional.gov.co)
   ============================================================ */
.brandbar{
  background:var(--paper); border-bottom:1px solid var(--clay);
  padding:.9rem 1.25rem;
}
.brandbar-inner{
  max-width:1200px; margin:0 auto;
  display:flex; align-items:center; justify-content:space-between;
  gap:1.25rem; flex-wrap:wrap;
}
.brand{ display:inline-flex; align-items:center; gap:.75rem; text-decoration:none; color:var(--ink); }
.brand svg{ display:block; height:52px; width:auto; }
.brand-name{ font-size:.95rem; line-height:1.25; font-weight:600; }

.topbar{
  background:var(--ink); color:#fff;
  padding:.7rem 1.25rem; font-size:.95rem;
}
.topbar-inner{ max-width:1200px; margin:0 auto; }
.topbar em{ font-style:italic; font-weight:300; }

.breadcrumb{
  background:var(--surface); border-bottom:1px solid var(--clay);
  padding:.55rem 1.25rem; font-size:.9rem;
}
.breadcrumb ol{
  list-style:none; margin:0 auto; padding:0; max-width:1200px;
  display:flex; flex-wrap:wrap; gap:.35rem;
}
.breadcrumb li + li::before{ content:"›"; margin-right:.35rem; color:var(--ink-soft); }
.breadcrumb a{ color:var(--ink); text-decoration:underline; text-underline-offset:2px; }
.breadcrumb [aria-current="page"]{ color:var(--ink-soft); }

.hero{
  background:
    linear-gradient(rgba(48,48,46,.85), rgba(48,48,46,.85)),
    repeating-linear-gradient(45deg, #4a4a47 0 6px, #3a3a38 6px 12px);
  color:#fff; padding:2rem 1.25rem;
}
.hero-inner{ max-width:1200px; margin:0 auto; display:flex; align-items:center; gap:1rem; }
.hero h1{ margin:0; font-size:clamp(1.5rem, 4vw, 2.25rem); letter-spacing:.06em; }
.hero h1 em{ font-style:italic; font-weight:300; }
.hero-mark{
  flex:0 0 auto; width:44px; height:44px; border:2px solid #fff;
  border-radius:6px; display:grid; place-items:center;
}
.hero-mark span{ width:16px; height:16px; background:#fff; border-radius:3px; }

/* ============================================================
   BOTONES · objetivo táctil mínimo 44×44 px (AAA 2.5.5)
   ============================================================ */
.btn{
  font:inherit; cursor:pointer; border-radius:var(--radius);
  display:inline-flex; align-items:center; gap:.5rem;
  min-height:44px; min-width:44px; padding:.55rem 1.15rem; font-weight:600;
  border:1.5px solid var(--ink); text-decoration:none;
}
.btn-dark{ background:var(--ink); color:#fff; }
.btn-dark:hover{ background:#1d1d1c; }
.btn-light{ background:var(--surface); color:var(--ink); border-color:var(--clay); }
.btn-light:hover{ background:#e6e2dc; border-color:var(--ink); }

/* ============================================================
   BARRA DE ACCIONES · botón de filtros + buscador
   ============================================================ */
.actions{
  max-width:1200px; margin:0 auto; padding:1.25rem;
  display:flex; flex-wrap:wrap; gap:.75rem;
  align-items:center; justify-content:space-between;
}
.filters-trigger .badge-count{
  background:#fff; color:var(--ink); border-radius:999px;
  font-size:.8rem; min-width:1.5rem; height:1.5rem;
  display:grid; place-items:center; padding:0 .4rem; font-weight:700;
}
.search{ display:flex; flex:1 1 420px; max-width:640px; }
.search input{
  flex:1; font:inherit; color:var(--ink);
  border:1.5px solid var(--ink); border-right:none;
  border-radius:var(--radius) 0 0 var(--radius);
  padding:.55rem .9rem; min-height:44px; background:#fff;
}
.search input::placeholder{ color:var(--ink-soft); opacity:1; } /* 8,5:1 ✓ AAA */
.search button{ border-radius:0 var(--radius) var(--radius) 0; border:1.5px solid var(--ink); }
.advanced-link{
  font-size:.9rem; color:var(--ink);
  text-decoration:underline; text-underline-offset:3px;
  min-height:44px; display:inline-flex; align-items:center;
}
.results-count{
  max-width:1200px; margin:0 auto; padding:0 1.25rem .75rem;
  font-size:.95rem; color:var(--ink-soft);
}
.results-count strong{ color:var(--ink); }

/* ============================================================
   PANEL LATERAL DE FILTROS · off-canvas invocable
   ============================================================ */
.drawer-overlay{
  position:fixed; inset:0; background:rgba(48,48,46,.55);
  opacity:0; pointer-events:none; transition:opacity .2s ease; z-index:90;
}
.drawer-overlay.is-open{ opacity:1; pointer-events:auto; }

.drawer{
  position:fixed; top:0; bottom:0; left:0; z-index:100;
  width:min(340px, 92vw); background:var(--paper);
  border-right:1px solid var(--clay); box-shadow:var(--shadow);
  transform:translateX(-105%); transition:transform .25s ease;
  display:flex; flex-direction:column;
}
.drawer.is-open{ transform:translateX(0); }
.drawer-head{
  display:flex; align-items:center; justify-content:space-between;
  padding:1rem 1.25rem; border-bottom:1px solid var(--clay); background:var(--surface);
}
.drawer-head h2{ margin:0; font-size:1.15rem; }
.drawer-close{
  background:transparent; border:1.5px solid var(--ink); color:var(--ink);
  border-radius:8px; width:44px; height:44px; font-size:1.25rem; cursor:pointer;
  display:grid; place-items:center;
}
.drawer-close:hover{ background:var(--ink); color:#fff; }
.drawer-body{ overflow-y:auto; padding:1rem 1.25rem 1.5rem; flex:1; }
.drawer-clear{ width:100%; justify-content:center; margin-bottom:1.1rem; }

.filter-group{ border:none; margin:0 0 .4rem; padding:0; }
.filter-group legend{
  font-weight:700; font-size:1rem; padding:.4rem 0;
  border-bottom:2px solid var(--clay); width:100%;
}
.filter-option{
  display:flex; align-items:center; gap:.6rem;
  min-height:44px; padding:.15rem .1rem;
}
.filter-option input[type="checkbox"]{
  width:22px; height:22px; accent-color:var(--ink); flex:0 0 auto;
}
.filter-option label{ flex:1; cursor:pointer; }
.filter-option .count{
  font-size:.85rem; color:var(--ink-soft); font-variant-numeric:tabular-nums;
}
.filter-group input[type="text"]{
  display:block; width:100%; font:inherit; color:var(--ink);
  border:1.5px solid var(--clay); border-radius:8px;
  padding:.5rem .75rem; min-height:44px; margin:.5rem 0;
}
.filter-more{
  width:100%; justify-content:center; min-height:44px;
  font-size:.9rem; margin:.4rem 0 .9rem;
}
.drawer-apply{
  padding:1rem 1.25rem; border-top:1px solid var(--clay); background:var(--surface);
}
.drawer-apply .btn{ width:100%; justify-content:center; }

/* ============================================================
   GRILLA DE RESULTADOS
   ============================================================ */
main{ max-width:1200px; margin:0 auto; padding:0 1.25rem 2rem; }
.grid{
  display:grid; gap:1.25rem;
  grid-template-columns:repeat(auto-fill, minmax(280px, 1fr));
}
.card{
  background:var(--paper); border:1px solid var(--clay);
  border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow);
  display:flex; flex-direction:column;
}
.card-img{ background:var(--surface); aspect-ratio:4/3; }
.card-img svg{ display:block; width:100%; height:100%; }
.card-body{
  padding:1rem 1.1rem 1.25rem; display:flex; flex-direction:column;
  gap:.5rem; flex:1;
}
.card h3{ margin:.1rem 0 0; font-size:1.05rem; line-height:1.4; }
.card h3 a{ color:var(--ink); text-decoration:none; }
.card h3 a:hover, .card h3 a:focus-visible{ text-decoration:underline; text-underline-offset:3px; }
.card dl{ margin:0; font-size:.9rem; color:var(--ink-soft); }
.card dl div{ display:flex; gap:.35rem; flex-wrap:wrap; }
.card dt{ font-weight:600; }
.card dt::after{ content:":"; }
.card dd{ margin:0; }
.card .btn{ margin-top:auto; align-self:flex-start; font-size:.95rem; }

/* ---------- Chips de estado ---------- */
.chip{
  display:inline-flex; align-items:center; gap:.4rem;
  font-size:.8rem; font-weight:600; color:var(--ink);
  border-radius:999px; padding:.25rem .7rem; width:fit-content;
}
.chip-green { background:var(--badge-green);  border:1px solid #4c7a5c; }
.chip-yellow{ background:var(--badge-yellow); border:1px solid #8a8544; }
.chip-red   { background:var(--badge-red-bg); border:1px solid var(--badge-red); }
.chip-red::before{
  content:""; width:.55rem; height:.55rem; border-radius:50%;
  background:var(--badge-red); flex:0 0 auto;
}

/* ============================================================
   PAGINACIÓN
   ============================================================ */
.pagination{ margin:2rem auto 0; }
.pagination ul{
  list-style:none; margin:0; padding:0;
  display:flex; flex-wrap:wrap; gap:.5rem; justify-content:center;
}
.pagination a, .pagination span{
  display:grid; place-items:center; min-width:44px; min-height:44px;
  padding:0 .8rem; border:1.5px solid var(--clay); border-radius:8px;
  color:var(--ink); text-decoration:none; font-weight:600; background:#fff;
}
.pagination a:hover{ border-color:var(--ink); background:var(--surface); }
.pagination [aria-current="page"]{ background:var(--ink); color:#fff; border-color:var(--ink); }
.pagination .ellipsis{ border:none; background:transparent; color:var(--ink-soft); }
.page-status{ text-align:center; color:var(--ink-soft); font-size:.9rem; margin-top:.75rem; }

/* ============================================================
   PÁGINA DE DETALLE
   ============================================================ */
.object{
  display:grid; gap:2rem; margin-top:1.5rem;
  grid-template-columns:minmax(0, 5fr) minmax(0, 6fr);
  align-items:start;
}
.object-media figure{ margin:0; }
.object-frame{
  background:var(--surface); border:1px solid var(--clay);
  border-radius:var(--radius); padding:1.25rem; box-shadow:var(--shadow);
}
.object-frame svg{ display:block; width:100%; height:auto; border-radius:4px; }
.object-media figcaption{ font-size:.85rem; color:var(--ink-soft); margin-top:.6rem; }

.thumbs{ display:flex; gap:.6rem; margin-top:.9rem; }
.thumbs button{
  width:64px; height:64px; padding:0; cursor:pointer;
  border:2px solid var(--clay); border-radius:8px;
  background:var(--surface); overflow:hidden;
}
.thumbs button[aria-pressed="true"]{ border-color:var(--ink); border-width:3px; }
.thumbs svg{ width:100%; height:100%; display:block; }

.object-info h1{
  margin:0 0 1rem; font-size:clamp(1.35rem, 3vw, 1.8rem); line-height:1.35;
}
.meta{ margin:0; }
.meta div{ display:flex; gap:.4rem; flex-wrap:wrap; padding:.35rem 0; }
.meta dt{ font-weight:700; }
.meta dt::after{ content:":"; }
.meta dd{ margin:0; color:var(--ink-soft); }
.meta dd b{ color:var(--ink); font-weight:600; }

.chips{ display:flex; flex-wrap:wrap; gap:.6rem; margin:1.25rem 0 0; padding:0; list-style:none; }
.chips .chip{ font-size:.85rem; padding:.35rem .85rem; }

/* ---------- Pestañas ---------- */
.tabs{ margin-top:2.25rem; }
[role="tablist"]{
  display:flex; flex-wrap:wrap; gap:.4rem;
  border-bottom:2px solid var(--clay);
}
[role="tab"]{
  font:inherit; font-weight:600; cursor:pointer;
  background:var(--surface); color:var(--ink);
  border:1px solid var(--clay); border-bottom:none;
  border-radius:8px 8px 0 0; padding:.65rem 1.1rem; min-height:44px;
}
[role="tab"]:hover{ background:#e6e2dc; }
[role="tab"][aria-selected="true"]{ background:var(--ink); color:#fff; border-color:var(--ink); }
[role="tabpanel"]{
  border:1px solid var(--clay); border-top:none;
  border-radius:0 0 var(--radius) var(--radius);
  padding:1.25rem 1.4rem; background:#fff;
}

footer{
  margin-top:2.5rem; background:var(--ink); color:#fff;
  padding:1.25rem; text-align:center; font-size:.9rem;
}

/* ============================================================
   MÓVIL · tarjetas a DOS columnas
   En pantallas pequeñas cada tarjeta muestra solo la información
   esencial: título, autor y colección. La fecha y el número de
   registro (.meta-detalle) se consultan en la página de detalle.
   ============================================================ */
@media (max-width:720px){
  .brandbar-inner{ justify-content:center; gap:1rem; }
  .brand svg{ height:40px; }
  .brand-name{ font-size:.8rem; }

  .actions{ flex-direction:column; align-items:stretch; }
  .filters-trigger{ width:100%; justify-content:center; }
  .search{ max-width:none; }
  .advanced-link{ justify-content:center; }

  .grid{
    grid-template-columns:repeat(2, minmax(0, 1fr));
    gap:.75rem;
  }
  .card-img{ aspect-ratio:1/1; }
  .card-body{ padding:.75rem .8rem 1rem; gap:.4rem; }
  .card h3{ font-size:.95rem; }
  .card dl{ font-size:.85rem; }
  .card .meta-detalle{ display:none; }   /* fecha y registro: solo en el detalle */
  .card .btn{ width:100%; justify-content:center; font-size:.9rem; }
  .chip{ font-size:.75rem; padding:.2rem .6rem; }

  .object{ grid-template-columns:1fr; gap:1.5rem; }
  [role="tablist"]{ flex-direction:column; border-bottom:none; }
  [role="tab"]{ border-radius:8px; border-bottom:1px solid var(--clay); text-align:left; }
  [role="tab"][aria-selected="true"]{ border-color:var(--ink); }
  [role="tabpanel"]{ border-top:1px solid var(--clay); border-radius:var(--radius); margin-top:.6rem; }

  .hero{ padding:1.5rem 1.25rem; }
}

/* Pantallas muy angostas: no forzar dos columnas si no caben
   objetivos táctiles de 44 px (AAA 2.5.5). */
@media (max-width:360px){
  .grid{ grid-template-columns:1fr; }
}