:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #273449;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #334155;
  --mark: #fde047;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: inherit; }

header {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 10;
}

header h1 {
  font-size: 1.25rem;
  margin: 0;
  white-space: nowrap;
}

.brand-dot { color: var(--accent); }

.container { max-width: 1100px; margin: 0 auto; padding: 24px; }

/* --- Buscador --- */
.search-wrap { flex: 1; position: relative; }

#search-input {
  width: 100%;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font-size: 1rem;
}
#search-input:focus { outline: 2px solid var(--accent); border-color: transparent; }

.hint { color: var(--muted); font-size: 0.8rem; margin-top: 6px; }

/* --- Zona de subida --- */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 28px;
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  transition: border-color .15s, background .15s;
  margin-bottom: 24px;
}
.dropzone.dragover { border-color: var(--accent); background: rgba(37,99,235,.08); color: var(--text); }
.dropzone strong { color: var(--text); }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 9px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
  text-decoration: none;
}
.btn:hover { background: var(--accent-hover); }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--muted); }
.btn-ghost:hover { background: var(--panel-2); color: var(--text); }

/* --- Estado de subida --- */
#upload-status { margin-bottom: 16px; }
.upload-item { font-size: 0.9rem; padding: 4px 0; }
.upload-item.ok { color: #4ade80; }
.upload-item.err { color: #f87171; }

/* --- Resultados de busqueda --- */
.section-title { font-size: 1.05rem; margin: 24px 0 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }

.result {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 10px;
  display: block;
  text-decoration: none;
  transition: border-color .15s;
}
.result:hover { border-color: var(--accent); }
.result-head { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 6px; }
.result-title { font-weight: 600; }
.result-page { color: var(--muted); font-size: 0.85rem; white-space: nowrap; }
.result-snippet { color: var(--muted); font-size: 0.92rem; }
.result-snippet mark { background: var(--mark); color: #1e293b; border-radius: 3px; padding: 0 2px; }

/* --- Rejilla del catalogo --- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 18px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.card-thumb {
  aspect-ratio: 3 / 4;
  background: var(--panel-2);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.card-thumb img { width: 100%; height: 100%; object-fit: cover; }
.card-thumb .placeholder { color: var(--muted); font-size: 2.5rem; }
.card-body { padding: 12px; flex: 1; display: flex; flex-direction: column; gap: 6px; }
.card-title { font-weight: 600; font-size: 0.95rem; word-break: break-word; }
.card-meta { color: var(--muted); font-size: 0.8rem; }
.card-actions { display: flex; gap: 8px; margin-top: auto; padding-top: 8px; }
.card-actions .btn, .card-actions .btn-ghost { flex: 1; text-align: center; padding: 6px 8px; font-size: 0.85rem; }
.badge-warn { color: #fbbf24; font-size: 0.78rem; }

.empty { color: var(--muted); text-align: center; padding: 40px 0; }

/* --- Portada / Hero --- */
.btn-lg { padding: 12px 22px; font-size: 1.05rem; }

.hero {
  display: flex;
  gap: 28px;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  flex-wrap: wrap;
}
.hero-cover {
  flex: 0 0 auto;
  width: 240px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .45);
  transition: transform .15s;
  background: #fff;
}
.hero-cover:hover { transform: translateY(-3px); }
.hero-cover img { width: 100%; height: auto; display: block; }
.hero-info h2 { margin: 0 0 4px; }
.hero-meta { color: var(--muted); margin: 0 0 16px; }

/* --- Lista de administración --- */
.admin-list { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.admin-row {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 12px;
}
.admin-thumb {
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
  border-radius: 6px;
  overflow: hidden;
  background: var(--panel-2);
  display: flex; align-items: center; justify-content: center;
}
.admin-thumb img { width: 100%; height: 100%; object-fit: cover; }
.admin-thumb .placeholder { font-size: 1.4rem; color: var(--muted); }
.admin-meta { flex: 1; min-width: 0; }
.admin-name { font-weight: 600; word-break: break-word; }

/* Botón rojo (eliminar / vaciar) */
.btn-danger { background: #b91c1c; }
.btn-danger:hover { background: #991b1b; }

/* Estado de subida en el panel de administración */
.upload-line { color: var(--muted); font-size: 0.85rem; margin: 4px 0; }
.upload-ok { color: #4ade80; font-size: 0.85rem; margin: 4px 0; }
.upload-err { color: #f87171; font-size: 0.85rem; margin: 4px 0; }

/* --- Login administración --- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  width: 100%;
  max-width: 360px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.login-card h1 { margin: 0; font-size: 1.3rem; }
.login-card input {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font-size: 1rem;
}
.login-card input:focus { outline: 2px solid var(--accent); border-color: transparent; }
.login-error {
  background: rgba(248, 113, 113, .15);
  color: #fca5a5;
  border: 1px solid #7f1d1d;
  border-radius: 8px;
  padding: 8px 12px;
  font-size: .9rem;
}
.login-back { text-align: center; margin-top: 4px; }

/* --- Interruptor de modo mantenimiento (panel admin) --- */
.switch-row { display: flex; align-items: center; gap: 14px; margin-top: 10px; }
.switch { position: relative; display: inline-block; width: 52px; height: 28px; flex: 0 0 auto; }
.switch input { position: absolute; opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.switch-slider {
  position: absolute; inset: 0;
  background: var(--panel-2); border: 1px solid var(--border);
  border-radius: 999px; transition: background .18s, border-color .18s;
  pointer-events: none;
}
.switch-slider::before {
  content: ""; position: absolute; height: 20px; width: 20px; left: 3px; top: 3px;
  background: #fff; border-radius: 50%; transition: transform .18s;
}
.switch input:checked + .switch-slider { background: #b91c1c; border-color: #b91c1c; }
.switch input:checked + .switch-slider::before { transform: translateX(24px); }
.switch input:disabled + .switch-slider { opacity: .5; }
.switch input:focus-visible + .switch-slider { outline: 2px solid var(--accent); outline-offset: 2px; }
.switch-label { font-weight: 600; }
.switch-label.on { color: #fca5a5; }

/* --- Formulario SEO (admin) --- */
.seo-form { display: flex; flex-direction: column; gap: 6px; max-width: 640px; }
.seo-form label { font-weight: 600; font-size: .92rem; margin-top: 10px; display: block; }
.seo-form input[type="text"],
.seo-form select,
.seo-form textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font: inherit;
}
.seo-form textarea { min-height: 90px; resize: vertical; }
.seo-form input[type="text"]:focus,
.seo-form textarea:focus { outline: 2px solid var(--accent); border-color: transparent; }
.seo-form input[type="file"] { color: var(--muted); }
.seo-form .btn-lg { margin-top: 18px; align-self: flex-start; }

/* Caja verde de "guardado correctamente" */
.ok-box {
  background: rgba(74, 222, 128, .12);
  border: 1px solid #166534;
  color: #86efac;
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 18px;
  font-size: .92rem;
}

/* --- Aviso --- */
.warn-box {
  background: rgba(251, 191, 36, .12);
  border: 1px solid #92660a;
  color: #fcd34d;
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 18px;
  font-size: .92rem;
}
.warn-box code { background: rgba(0, 0, 0, .3); padding: 1px 6px; border-radius: 4px; }

/* --- Visor / Flipbook --- */
.viewer-body { overflow: hidden; }
.viewer-page { display: flex; flex-direction: column; height: 100vh; }
.viewer-bar { background: var(--panel); border-bottom: 1px solid var(--border); padding: 10px 18px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.viewer-bar .title { font-weight: 600; }
.viewer-bar a.title { text-decoration: none; }
.viewer-bar a.title:hover { color: var(--accent); }
/* Logotipo de la marca en la barra (admin -> SEO). El alto lo fija el admin
   (28/44/60 px, estilo en linea); vale apaisado o cuadrado. */
.brand-logo {
  display: block;
  height: 44px;              /* respaldo si faltara el estilo en linea */
  width: auto;
  max-width: 240px;
  object-fit: contain;
  border-radius: 8px;        /* los logos cuadrados con fondo quedan suaves */
}
.viewer-bar .spacer { flex: 1; }
.viewer-bar .btn[disabled] { opacity: .4; cursor: default; }
.viewer-note { color: var(--muted); font-size: 0.9rem; min-width: 130px; text-align: center; }

/* Contador de página editable (clicable para saltar a una página) */
.page-jump { display: inline-flex; align-items: center; gap: 6px; min-width: auto; }
.page-input {
  width: 56px;
  padding: 5px 8px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font-size: 0.9rem;
  text-align: center;
  -moz-appearance: textfield;
}
.page-input:focus { outline: 2px solid var(--accent); border-color: transparent; }
.page-input::-webkit-outer-spin-button,
.page-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.page-sep { color: var(--muted); }
.zoom-btn { font-weight: 700; }

/* Capa que se amplía/reduce con la lupa o el pellizco (pinch) */
.zoom-layer {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  transform-origin: center center;
}

/* Menú desplegable (descargar / imprimir) */
.menu-wrap { position: relative; }
.menu-dropdown {
  position: absolute; left: 0; top: calc(100% + 6px);
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 10px; box-shadow: 0 10px 30px rgba(0, 0, 0, .45);
  z-index: 40; min-width: 250px; max-width: 86vw; padding: 6px;
  display: flex; flex-direction: column; gap: 2px;
}
.menu-dropdown[hidden] { display: none; }
.menu-dropdown button {
  text-align: left; background: transparent; border: 0; color: var(--text);
  padding: 11px 12px; border-radius: 8px; cursor: pointer; font: inherit; white-space: nowrap;
}
.menu-dropdown button:hover { background: var(--panel-2); }

/* --- Responsive (móvil): barra compacta y página a pantalla completa --- */
@media (max-width: 640px) {
  .viewer-bar { padding: 6px 8px; gap: 6px; }
  .viewer-bar .spacer { display: none; }     /* los botones fluyen a la izq. */
  .viewer-bar .title { display: none; }
  .viewer-bar .lbl { display: none; }        /* deja solo los iconos */
  .viewer-bar .btn { padding: 9px 11px; }
  #toggle-mode { display: none; }            /* en móvil, una sola página */
  .flip-stage { padding: 6px; touch-action: none; }
  .viewer-note { min-width: auto; font-size: 1rem; }
  .page-input { width: 44px; }
}

/* Panel de búsqueda deslizante (izquierda) */
.search-panel {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: 360px;
  max-width: 88vw;
  background: var(--panel);
  border-right: 1px solid var(--border);
  box-shadow: 6px 0 30px rgba(0, 0, 0, .45);
  transform: translateX(-100%);
  transition: transform .28s ease;
  z-index: 30;
  display: flex;
  flex-direction: column;
}
.search-panel.open { transform: translateX(0); }

.search-panel-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.search-panel-head strong { font-size: 1.05rem; }

.search-panel-input { padding: 12px 16px 6px; }
.search-panel-input input {
  width: 100%;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font-size: 0.95rem;
}
.search-panel-input input:focus { outline: 2px solid var(--accent); border-color: transparent; }

.search-panel-count { padding: 4px 16px 8px; color: var(--muted); font-size: 0.85rem; }

.search-results {
  flex: 1;
  overflow-y: auto;
  padding: 4px 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.search-hit {
  display: flex;
  gap: 12px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-2);
  cursor: pointer;
  text-align: left;
  color: var(--text);
  font: inherit;
  transition: border-color .15s, background .15s;
}
.search-hit:hover { border-color: var(--accent); background: #2c3a52; }
.search-hit-thumb {
  flex: 0 0 auto;
  width: 64px;
  height: 90px;
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
  display: flex; align-items: center; justify-content: center;
}
.search-hit-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.search-hit-body { min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.search-hit-page { font-weight: 600; font-size: 0.9rem; }
.search-hit-snippet { color: var(--muted); font-size: 0.82rem; line-height: 1.35; }
.search-hit-snippet mark { background: var(--mark); color: #1e293b; border-radius: 3px; padding: 0 2px; }

.search-backdrop {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, .25);
  z-index: 25;
}

/* Escenario con fondo tipo "mesa" donde reposa el catalogo */
.flip-stage {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
  background: radial-gradient(circle at 50% 30%, #2b3a52 0%, #0b1220 80%);
  overflow: hidden;
  cursor: grab;   /* pista: se puede deslizar para pasar página */
}

/* El tamaño del libro lo fija JS; aquí lo centramos. La transición anima el
   desplazamiento al centrar la portada/contraportada. */
.flip-book { margin: auto; transition: transform .45s ease; }

/* Cada hoja del libro. OJO: NO fijar position/display aquí; la librería las
   gestiona en .stf__item (position:absolute, display:none hasta mostrarlas). */
.flip-book .page {
  background: #fff;
}

/* Sombra del lomo: con el libro abierto a doble página, cada hoja se oscurece
   suavemente hacia el centro (el "dobladillo"), como un catálogo de papel.
   Va en un ::after por encima de la imagen y no intercepta clics ni gestos. */
.flip-book .page::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
}
.flip-book.mode-two .page-left::after {
  background: linear-gradient(to right,
    rgba(0, 0, 0, 0) 86%,
    rgba(0, 0, 0, .05) 93%,
    rgba(0, 0, 0, .14) 98%,
    rgba(0, 0, 0, .30) 100%);
}
.flip-book.mode-two .page-right::after {
  background: linear-gradient(to left,
    rgba(0, 0, 0, 0) 86%,
    rgba(0, 0, 0, .05) 93%,
    rgba(0, 0, 0, .14) 98%,
    rgba(0, 0, 0, .30) 100%);
}
.flip-book .page .page-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  object-fit: fill;
  background: #fff;
}

/* Capa de texto transparente (PDF.js) -> permite SELECCIONAR el texto */
.textLayer {
  position: absolute;
  inset: 0;
  overflow: hidden;
  line-height: 1;
  text-align: initial;
  forced-color-adjust: none;
}
.textLayer span {
  position: absolute;
  white-space: pre;
  color: transparent;
  cursor: text;
  transform-origin: 0 0;
}
.textLayer span.hl {
  background: rgba(253, 224, 71, .55);
  border-radius: 2px;
}
.textLayer ::selection { background: rgba(37, 99, 235, .35); }
.textLayer ::-moz-selection { background: rgba(37, 99, 235, .35); }

.flip-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 1rem;
  pointer-events: none;
}