/* ==========================================================================
   Skala 360 · Biblioteca (portada del sitio) — tema claro, como skala360.com
   ========================================================================== */

body.biblioteca { background: var(--blanco); color: var(--texto); }

/* --- Portada -------------------------------------------------------------- */
.portada {
  position: relative;
  overflow: hidden;
  padding: clamp(44px, 6vw, 82px) 0 clamp(48px, 7vw, 90px);
  background: linear-gradient(180deg, #FFFFFF 0%, var(--crema) 100%);
}
.portada .contenedor { position: relative; z-index: 2; }
.portada-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
  gap: clamp(30px, 5vw, 68px);
  align-items: center;
}
@media (max-width: 940px) { .portada-grid { grid-template-columns: 1fr; } }

.portada h1 {
  font-family: var(--marca);
  font-weight: 600;
  font-size: clamp(2.4rem, 5.6vw, 3.9rem);
  line-height: 1.04;
  letter-spacing: -.03em;
  color: var(--marron);
  margin: 14px 0 20px;
}
.portada h1 em { font-style: normal; color: var(--bronce); display: block; }
.portada .entrada {
  font-size: clamp(1rem, 1.4vw, 1.12rem);
  line-height: 1.68;
  color: var(--texto);
  max-width: 50ch;
}
.portada .acciones { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

/* Blob cobre detrás del texto, guiño al sitio */
.portada .blob-cobre {
  width: min(560px, 52vw);
  aspect-ratio: 1.35;
  left: -18%;
  top: -14%;
  background: radial-gradient(60% 60% at 50% 50%, rgba(192,126,56,.16), rgba(192,126,56,0) 70%);
}

/* Cifras */
.cifras {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 3.4vw, 42px);
  margin-top: 36px;
  padding-top: 26px;
  border-top: 1px solid var(--crema-3);
}
.cifra b {
  display: block;
  font-family: var(--marca);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--marron);
  line-height: 1.1;
  letter-spacing: -.02em;
}
.cifra span { font-size: .78rem; letter-spacing: .03em; color: var(--gris); }

/* --- Collage de portada --------------------------------------------------- */
.collage {
  position: relative;
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  grid-template-rows: auto auto;
  gap: 14px;
  align-items: stretch;
}
.collage figure { margin: 0; overflow: hidden; background: var(--crema-2); }
.collage img { width: 100%; height: 100%; object-fit: cover; display: block; }
.collage .principal {
  grid-row: 1 / 3;
  border-radius: var(--r-xl) var(--r-xl) 140px var(--r-xl);
  min-height: clamp(300px, 38vw, 440px);
  box-shadow: var(--sombra-md);
}
.collage .secundaria { border-radius: 130px var(--r-xl) var(--r-xl) var(--r-xl); min-height: 140px; }
.collage .terciaria  { border-radius: var(--r-xl) var(--r-xl) var(--r-xl) 130px; min-height: 140px; }
@media (max-width: 940px) {
  .collage { grid-template-columns: 1.4fr 1fr; }
  .collage .principal { min-height: 260px; }
}

/* --- Pilares (por qué resistirá) ----------------------------------------- */
.pilares { padding: clamp(40px, 5.5vw, 68px) 0 0; }
.pilares .antetitulo { margin-bottom: 18px; }
.pilares-rejilla { display: grid; gap: 14px; grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .pilares-rejilla { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .pilares-rejilla { grid-template-columns: 1fr; } }
.pilar {
  padding: 18px 20px;
  border-radius: var(--r-md);
  background: var(--crema-2);
  border: 1px solid var(--crema-3);
}
.pilar svg { width: 28px; height: 28px; color: var(--bronce); margin-bottom: 10px; }
.pilar b { display: block; font-size: .9rem; color: var(--marron); }
.pilar span { font-size: .79rem; color: var(--gris); line-height: 1.45; display: block; margin-top: 4px; }
.pilares-pie { margin-top: 18px; font-size: .88rem; color: var(--gris); }
.pilares-pie a { color: var(--bronce); font-weight: 600; text-decoration: underline; text-underline-offset: 2px; }
.pilares-pie a:hover { color: var(--marron); }

/* --- Catálogo ------------------------------------------------------------- */
.catalogo { padding: clamp(48px, 7vw, 84px) 0 clamp(56px, 8vw, 96px); }
.catalogo-cab { max-width: 62ch; margin-bottom: 30px; }
.catalogo-cab h2 {
  font-family: var(--marca);
  font-weight: 600;
  letter-spacing: -.025em;
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  color: var(--marron);
  margin: 10px 0 12px;
}
.catalogo-cab p { color: var(--gris); font-size: .95rem; }

.herramientas {
  display: flex; flex-wrap: wrap; gap: 14px;
  align-items: center; justify-content: space-between;
  margin-bottom: 30px;
}
.filtros { display: flex; flex-wrap: wrap; gap: 8px; }
.filtro {
  padding: .5em 1.1em;
  border-radius: 999px;
  font-size: .85rem;
  font-weight: 500;
  color: var(--marron);
  background: var(--crema-2);
  border: 1px solid var(--crema-3);
  transition: all var(--transicion);
}
.filtro:hover { border-color: var(--bronce); background: #fff; }
.filtro[aria-pressed='true'] { background: var(--marron); border-color: var(--marron); color: #fff; }

.campo-busqueda {
  display: flex; align-items: center; gap: 9px;
  padding: .58em 1.05em;
  min-width: 262px;
  border-radius: 999px;
  background: var(--crema-2);
  border: 1px solid var(--crema-3);
}
.campo-busqueda:focus-within { border-color: var(--bronce); background: #fff; }
.campo-busqueda svg { width: 16px; height: 16px; color: var(--gris); flex: none; }
.campo-busqueda input { flex: 1; min-width: 0; background: none; border: 0; outline: none; font-size: .9rem; color: var(--tinta); }
.campo-busqueda input::placeholder { color: var(--gris-claro); }

.rejilla {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: clamp(20px, 2.6vw, 30px);
}

.doc {
  display: flex;
  flex-direction: column;
  border-radius: var(--r-lg);
  background: #fff;
  border: 1px solid var(--crema-3);
  overflow: hidden;
  transition: transform var(--transicion), box-shadow var(--transicion), border-color var(--transicion);
  animation: aparecer 500ms cubic-bezier(.22,.61,.36,1) backwards;
}
@keyframes aparecer { from { opacity: 0; transform: translateY(14px); } }
.doc:hover { transform: translateY(-4px); box-shadow: var(--sombra-md); border-color: var(--bronce-suave); }

.doc-portada {
  position: relative;
  display: grid;
  place-items: end center;
  height: clamp(186px, 16vw, 218px);
  padding: 24px 24px 0;
  background: linear-gradient(165deg, var(--crema-2), #EFE6D9);
  overflow: hidden;
}
.doc-portada::before {           /* halo cobre detrás de la portada */
  content: '';
  position: absolute;
  inset: auto -20% -60% -20%;
  height: 150%;
  background: radial-gradient(50% 50% at 50% 40%, rgba(192,126,56,.20), rgba(192,126,56,0) 70%);
}
.doc-portada .hoja {
  position: relative;
  height: 100%;
  border-radius: 4px 8px 0 0;
  overflow: hidden;
  background: #fff;
  box-shadow: -4px 0 0 rgba(104,60,22,.10) inset, 0 10px 26px rgba(104,60,22,.24);
  transform-origin: bottom center;
  transition: transform 420ms cubic-bezier(.22,.61,.36,1);
}
.doc-portada .hoja img { height: 100%; width: auto; max-width: none; object-fit: contain; display: block; }
.doc:hover .doc-portada .hoja { transform: translateY(-6px) rotate(-1.2deg); }
.doc-portada .num {
  position: absolute;
  right: 14px;
  top: 12px;
  z-index: 2;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(6px);
  font-size: .7rem;
  font-weight: 600;
  color: var(--marron);
}
.doc-portada .formato {
  position: absolute;
  left: 14px;
  top: 12px;
  z-index: 2;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--bronce);
  color: #fff;
  font-size: .66rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.doc-cuerpo { flex: 1; display: flex; flex-direction: column; padding: 20px 22px 22px; }
.doc-categoria { align-self: flex-start; background: var(--crema-2); color: var(--marron-medio); margin-bottom: 10px; }
.doc h3 { font-family: var(--marca); font-weight: 600; letter-spacing: -.02em; font-size: 1.12rem; color: var(--marron); line-height: 1.25; }
.doc .sub { font-size: .8rem; color: var(--bronce); margin-top: 4px; font-weight: 500; }
.doc .desc { font-size: .86rem; line-height: 1.55; color: var(--gris); margin-top: 10px; flex: 1; }
.doc-acciones {
  display: flex; align-items: center; gap: 8px;
  margin-top: 18px; padding-top: 16px;
  border-top: 1px solid var(--crema-3);
}
.doc-acciones .btn { flex: 1; }
.doc-pdf {
  display: grid; place-items: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  color: var(--gris);
  border: 1px solid var(--crema-3);
  transition: all var(--transicion);
}
.doc-pdf svg { width: 17px; height: 17px; }
.doc-pdf:hover { color: var(--bronce); border-color: var(--bronce); background: var(--crema-2); }

.sin-resultados { padding: 60px 0; text-align: center; color: var(--gris); }

/* --- Franja de imagen ----------------------------------------------------- */
.franja {
  position: relative;
  min-height: clamp(240px, 30vw, 340px);
  display: grid;
  place-items: center;
  text-align: center;
  overflow: hidden;
  color: #fff;
}
.franja img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.franja::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(51,38,27,.30), rgba(51,38,27,.62));
}
.franja .contenedor { position: relative; z-index: 2; }
.franja h2 {
  font-family: var(--marca);
  font-weight: 600;
  letter-spacing: -.025em;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  margin-bottom: 12px;
  color: #fff;
}
.franja p { color: rgba(255,255,255,.86); max-width: 56ch; margin-inline: auto; }
.franja .acciones { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 24px; }

/* --- Cómo funciona -------------------------------------------------------- */

/* --- Con el respaldo de --------------------------------------------------- */
.respaldo { padding: clamp(40px, 5vw, 64px) 0; background: var(--crema); border-top: 1px solid var(--crema-3); }
.respaldo .contenedor { text-align: center; }
.respaldo h3 {
  font-family: var(--sans);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gris);
  margin-bottom: 26px;
}
.respaldo-logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(14px, 2.4vw, 26px);
}
.respaldo-logo {
  display: grid;
  place-items: center;
  min-width: clamp(160px, 20vw, 230px);
  min-height: 108px;
  padding: 20px 26px;
  border-radius: var(--r-md);
  background: #fff;
  border: 1px solid var(--crema-3);
  transition: transform var(--transicion), box-shadow var(--transicion);
}
.respaldo-logo:hover { transform: translateY(-3px); box-shadow: var(--sombra-md); }
.respaldo-logo img { max-height: 54px; width: auto; object-fit: contain; }
.respaldo-logo.alto img { max-height: 94px; }
.respaldo-pie { margin-top: 20px; font-size: .82rem; color: var(--gris); }
.respaldo-pie b { color: var(--marron); font-weight: 600; }
.respaldo-pie a { color: var(--bronce); font-weight: 600; text-decoration: underline;
                  text-underline-offset: 2px; transition: color var(--transicion); }
.respaldo-pie a:hover { color: var(--marron); }

/* logo de marca en cabecera y pie */
.marca-img { display: inline-flex; align-items: center; }
.marca-img img { height: 26px; width: auto; }
.pie .marca-img img { height: 24px; filter: brightness(0) invert(1) sepia(.2); opacity: .95; }
.pie-logos { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 18px; }
.pie-logos img { height: 26px; width: auto; filter: brightness(0) invert(1); opacity: .72; transition: opacity var(--transicion); }
.pie-logos a:hover img { opacity: 1; }


/* --- El catálogo en el celular -------------------------------------------
   La tarjeta vertical obligaba a un scroll larguísimo: una portada enorme por
   documento. En horizontal caben todas de un vistazo y se sigue viendo la
   portada, que es lo que permite reconocerlas. */
@media (max-width: 620px) {
  .herramientas { gap: 14px; }

  /* Los filtros se desplazan de lado en vez de apilarse en tres líneas */
  .filtros {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .filtros::-webkit-scrollbar { display: none; }
  .filtro { flex: none; }
  .campo-busqueda { min-width: 0; width: 100%; }

  .rejilla { grid-template-columns: 1fr; gap: 14px; }

  .doc { flex-direction: row; align-items: stretch; }
  .doc:hover { transform: none; box-shadow: none; }

  .doc-portada {
    width: 104px;
    flex: none;
    height: auto;
    padding: 14px 10px;
    place-items: center;
    border-right: 1px solid var(--crema-3);
  }
  .doc-portada::before { display: none; }
  .doc-portada .hoja { max-height: 128px; }
  .doc:hover .doc-portada .hoja { transform: none; }
  .doc-portada .formato { display: none; }
  .doc-portada .num {
    top: 8px; left: 8px; right: auto;
    font-size: .6rem; padding: 2px 6px;
  }

  .doc-cuerpo { min-width: 0; padding: 14px 16px 15px; }
  .doc h3 { font-size: 1rem; }
  .doc .sub { font-size: .74rem; }
  .doc .desc {
    margin-top: 7px;
    font-size: .8rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .doc-acciones { margin-top: 12px; padding-top: 12px; gap: 8px; }
  .doc-acciones .btn { font-size: .8rem; padding: .52em .8em; }
  .doc-pdf { width: 34px; height: 34px; flex: none; }
  .doc-pdf svg { width: 15px; height: 15px; }
}