/**
 * DASE File Browser — Frontend Styles
 * Diseño moderno, institucional y responsive.
 * Compatible con Kadence Theme y cualquier tema de WordPress.
 */

/* ── Variables CSS ─────────────────────────────────────────── */
:root {
  --dfb-primary:    #2563eb;
  --dfb-accent:     #1d4ed8;
  --dfb-bg:         #ffffff;
  --dfb-bg2:        #f8fafc;
  --dfb-border:     #e5e7eb;
  --dfb-text:       #111827;
  --dfb-muted:      #6b7280;
  --dfb-hover:      #eff6ff;
  --dfb-folder-bg:  #fef9c3;
  --dfb-radius:     6px;
  --dfb-shadow:     0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --dfb-font:       -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

/* ── Contenedor raíz ───────────────────────────────────────── */
.dfb-browser {
  font-family: var(--dfb-font);
  font-size: 14px;
  color: var(--dfb-text);
  background: var(--dfb-bg);
  border: 1px solid var(--dfb-border);
  border-radius: var(--dfb-radius);
  box-shadow: var(--dfb-shadow);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

/* ── Toolbar ───────────────────────────────────────────────── */
.dfb-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
  padding: .75rem 1rem;
  background: var(--dfb-bg2);
  border-bottom: 1px solid var(--dfb-border);
}

.dfb-breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .25rem;
  font-size: 13px;
  min-width: 0;
}
.dfb-bc-sep { color: var(--dfb-muted); }
.dfb-bc-item {
  color: var(--dfb-primary);
  cursor: pointer;
  background: none;
  border: none;
  padding: 2px 4px;
  border-radius: 4px;
  font-size: 13px;
  font-family: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: background .15s;
}
.dfb-bc-item:hover { background: var(--dfb-hover); }
.dfb-bc-item.active { color: var(--dfb-text); text-decoration: none; font-weight: 600; cursor: default; }

/* ── Buscador ──────────────────────────────────────────────── */
.dfb-search-wrap {
  position: relative;
  flex-shrink: 0;
}
.dfb-search {
  padding: .4rem .75rem .4rem 2rem;
  border: 1px solid var(--dfb-border);
  border-radius: 20px;
  font-size: 13px;
  width: 220px;
  background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E") .55rem center / 14px no-repeat;
  transition: border-color .2s, box-shadow .2s;
}
.dfb-search:focus {
  outline: none;
  border-color: var(--dfb-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

/* ── Sort controls ─────────────────────────────────────────── */
.dfb-sort-controls {
  display: flex;
  align-items: center;
  gap: .35rem;
  font-size: 12px;
  color: var(--dfb-muted);
}
.dfb-sort-btn {
  cursor: pointer;
  background: none;
  border: 1px solid var(--dfb-border);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 12px;
  font-family: inherit;
  color: var(--dfb-muted);
  transition: all .15s;
}
.dfb-sort-btn:hover,
.dfb-sort-btn.active { background: var(--dfb-primary); border-color: var(--dfb-primary); color: #fff; }

/* ── Loading / Error ───────────────────────────────────────── */
.dfb-loading, .dfb-error-msg, .dfb-empty {
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: var(--dfb-muted);
  font-size: 14px;
}
.dfb-error-msg { color: #dc2626; }
.dfb-spinner {
  display: inline-block;
  width: 18px; height: 18px;
  border: 2px solid var(--dfb-border);
  border-top-color: var(--dfb-primary);
  border-radius: 50%;
  animation: dfb-spin .7s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}
@keyframes dfb-spin { to { transform: rotate(360deg); } }

/* ═══════════════════════════════════════════════════════════
   MODO TABLA
═══════════════════════════════════════════════════════════ */
.dfb-table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.dfb-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}
.dfb-table thead tr {
  background: var(--dfb-bg2);
  border-bottom: 2px solid var(--dfb-border);
}
.dfb-table thead th {
  padding: .7rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--dfb-muted);
  white-space: nowrap;
}
.dfb-table tbody tr {
  border-bottom: 1px solid var(--dfb-border);
  transition: background .12s;
}
.dfb-table tbody tr:last-child { border-bottom: none; }
.dfb-table tbody tr:hover { background: var(--dfb-hover); }
.dfb-table td {
  padding: .65rem 1rem;
  vertical-align: middle;
}
.dfb-table .dfb-col-name {
  display: flex;
  align-items: center;
  gap: .5rem;
  cursor: pointer;
  min-width: 160px;
}
.dfb-table .dfb-col-name span { word-break: break-word; }
.dfb-table .dfb-col-name:hover span { color: var(--dfb-primary); text-decoration: underline; }
.dfb-table .dfb-col-meta { color: var(--dfb-muted); font-size: 12.5px; white-space: nowrap; }
.dfb-open-btn {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .3rem .75rem;
  background: var(--dfb-primary);
  color: #fff !important;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
  text-decoration: none !important;
  transition: background .15s;
  white-space: nowrap;
}
.dfb-open-btn:hover { background: var(--dfb-accent); }

/* ═══════════════════════════════════════════════════════════
   MODO TARJETAS
═══════════════════════════════════════════════════════════ */
.dfb-cards-wrap {
  padding: 1rem;
}
.dfb-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(155px, 1fr));
  gap: .75rem;
}
.dfb-card-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem .75rem .85rem;
  border: 1px solid var(--dfb-border);
  border-radius: var(--dfb-radius);
  cursor: pointer;
  text-align: center;
  transition: box-shadow .15s, border-color .15s, transform .1s;
  background: #fff;
  text-decoration: none !important;
  color: var(--dfb-text) !important;
  gap: .5rem;
  position: relative;
  overflow: hidden;
}
.dfb-card-item:hover {
  border-color: var(--dfb-primary);
  box-shadow: 0 4px 12px rgba(37,99,235,.15);
  transform: translateY(-2px);
}
.dfb-card-item.dfb-folder-card:hover { border-color: #ca8a04; box-shadow: 0 4px 12px rgba(202,138,4,.15); }
.dfb-card-icon { font-size: 2.5rem; line-height: 1; }
.dfb-card-name {
  font-size: 12px;
  font-weight: 500;
  line-height: 1.3;
  word-break: break-word;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  max-height: 2.6em;
}
.dfb-card-meta { font-size: 11px; color: var(--dfb-muted); }

/* ═══════════════════════════════════════════════════════════
   MODO EXPLORADOR (sidebar + lista)
═══════════════════════════════════════════════════════════ */
.dfb-explorer-wrap {
  display: flex;
  min-height: 320px;
}
.dfb-explorer-sidebar {
  width: 220px;
  flex-shrink: 0;
  border-right: 1px solid var(--dfb-border);
  background: var(--dfb-bg2);
  overflow-y: auto;
  padding: .5rem 0;
}
.dfb-sidebar-title {
  padding: .5rem 1rem;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--dfb-muted);
}
.dfb-tree-item {
  display: flex;
  align-items: center;
  gap: .35rem;
  padding: .4rem .75rem .4rem 1rem;
  cursor: pointer;
  font-size: 13px;
  border-left: 3px solid transparent;
  transition: background .12s, border-color .12s;
  word-break: break-all;
}
.dfb-tree-item:hover { background: var(--dfb-hover); }
.dfb-tree-item.active { background: var(--dfb-hover); border-left-color: var(--dfb-primary); font-weight: 600; color: var(--dfb-primary); }
.dfb-tree-toggle { cursor: pointer; font-size: 10px; color: var(--dfb-muted); user-select: none; }
.dfb-tree-children { padding-left: 1rem; }

.dfb-explorer-main {
  flex: 1;
  overflow-y: auto;
  overflow-x: auto;
  min-width: 0;
}

/* ── Íconos de tipo de archivo ─────────────────────────────── */
.dfb-icon { font-size: 1.2em; flex-shrink: 0; }
.dfb-icon-folder::before     { content: "📁"; }
.dfb-icon-pdf::before        { content: "📄"; }
.dfb-icon-word::before       { content: "📝"; }
.dfb-icon-excel::before      { content: "📊"; }
.dfb-icon-ppt::before        { content: "📰"; }
.dfb-icon-zip::before        { content: "🗜️"; }
.dfb-icon-image::before      { content: "🖼️"; }
.dfb-icon-text::before       { content: "📃"; }
.dfb-icon-video::before      { content: "🎬"; }
.dfb-icon-audio::before      { content: "🎵"; }
.dfb-icon-code::before       { content: "💻"; }
.dfb-icon-file::before       { content: "📎"; }

/* ── Paginación ────────────────────────────────────────────── */
.dfb-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .35rem;
  padding: .75rem 1rem;
  border-top: 1px solid var(--dfb-border);
  background: var(--dfb-bg2);
}
.dfb-page-btn {
  cursor: pointer;
  background: #fff;
  border: 1px solid var(--dfb-border);
  border-radius: 4px;
  padding: .25rem .6rem;
  font-size: 13px;
  font-family: inherit;
  transition: all .15s;
}
.dfb-page-btn:hover { background: var(--dfb-hover); border-color: var(--dfb-primary); }
.dfb-page-btn.active { background: var(--dfb-primary); border-color: var(--dfb-primary); color: #fff; }
.dfb-page-btn:disabled { opacity: .4; cursor: default; }

/* ── Resultado de búsqueda ─────────────────────────────────── */
.dfb-search-results {
  padding: .5rem 1rem;
  font-size: 13px;
  color: var(--dfb-muted);
  background: var(--dfb-bg2);
  border-bottom: 1px solid var(--dfb-border);
}
.dfb-search-tag {
  display: inline-block;
  background: var(--dfb-hover);
  color: var(--dfb-primary);
  border: 1px solid #bfdbfe;
  border-radius: 12px;
  padding: 1px 8px;
  font-size: 12px;
  font-weight: 600;
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
  .dfb-search { width: 160px; }
  .dfb-cards-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
  .dfb-explorer-wrap { flex-direction: column; }
  .dfb-explorer-sidebar { width: 100%; height: auto; max-height: 180px; border-right: none; border-bottom: 1px solid var(--dfb-border); }
  .dfb-table thead th:nth-child(3),
  .dfb-table td:nth-child(3),
  .dfb-table thead th:nth-child(4),
  .dfb-table td:nth-child(4) { display: none; }
}

@media (max-width: 480px) {
  .dfb-toolbar { flex-direction: column; align-items: flex-start; }
  .dfb-search { width: 100%; }
  .dfb-sort-controls { flex-wrap: wrap; }
}