/* Books: PDF library, upload, and reader. */

.topbar .tabs { display: flex; gap: 4px; margin-left: 10px; }
.topbar .tabs a {
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 13.5px;
  color: var(--text-dim);
}
.topbar .tabs a:hover { background: var(--bg-hover); color: var(--text); }
.topbar .tabs a.on { background: var(--bg-hover); color: var(--accent); font-weight: 600; }

/* ---------- upload ---------- */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 30px 24px;
  text-align: center;
  color: var(--text-dim);
  margin-bottom: 28px;
  transition: border-color .15s ease, background .15s ease;
  cursor: pointer;
}
.dropzone:hover { border-color: var(--accent); color: var(--text); }
.dropzone.over {
  border-color: var(--accent);
  background: rgba(232,85,78,.07);
  color: var(--text);
}
.dropzone b { color: var(--text); }
.dropzone .sub { font-size: 12.5px; margin-top: 6px; }

.uploads { margin-bottom: 24px; display: grid; gap: 8px; }
.up {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  background: var(--bg-elev);
  font-size: 13px;
}
.up .top { display: flex; gap: 10px; align-items: center; }
.up .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.up .pct { color: var(--text-dim); font-size: 12px; }
.up .bar { height: 4px; background: var(--bg); border-radius: 3px; margin-top: 8px; overflow: hidden; }
.up .bar i { display: block; height: 100%; background: var(--accent); width: 0; transition: width .15s; }
.up.done .bar i { background: #57c26b; }
.up.err { border-color: rgba(232,85,78,.5); }
.up.err .msg { color: var(--accent); font-size: 12px; margin-top: 5px; }

/* ---------- book cards ---------- */
.bk-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(126px, 1fr));
  gap: 14px;
}
.bk-card .thumb {
  aspect-ratio: 3 / 4;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .15s ease, border-color .15s ease;
}
.bk-card:hover .thumb { transform: translateY(-3px); border-color: var(--accent); }
.bk-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.bk-card .thumb .noimg { color: var(--text-dim); font-size: 30px; }
.bk-card .badge {
  position: absolute; right: 8px; bottom: 8px;
  background: rgba(0,0,0,.78); color: #fff;
  border-radius: 6px; padding: 3px 7px; font-size: 11.5px;
}
.bk-card h3 { margin: 8px 0 2px; font-size: 12.5px; font-weight: 600; line-height: 1.3; }
.bk-card .sub { color: var(--text-dim); font-size: 11.5px; }

/* ---------- reader ---------- */
body.bookview { overflow: hidden; height: 100vh; }
.topbar.slim { height: 50px; gap: 10px; }
.bk-title { font-weight: 600; font-size: 14px; }
.bk-meta { color: var(--text-dim); font-size: 12.5px; }

.bk-body { display: flex; height: calc(100vh - 50px); }
.bk-frame { flex: 1; background: #23242a; }
.bk-frame iframe { width: 100%; height: 100%; border: 0; display: block; }

.bk-toc {
  width: 270px;
  flex: none;
  background: var(--bg-elev);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 12px 0;
}
.bk-toc a {
  display: block;
  padding: 7px 16px;
  font-size: 13px;
  color: var(--text-dim);
  border-left: 2px solid transparent;
}
.bk-toc a:hover { background: var(--bg-hover); color: var(--text); border-left-color: var(--accent); }
.bk-toc .lv2 { padding-left: 30px; font-size: 12.5px; }
.bk-toc .lv3 { padding-left: 44px; font-size: 12px; }
.bk-toc .none { color: var(--text-dim); padding: 14px 16px; font-size: 12.5px; line-height: 1.6; }

@media (max-width: 640px) {
  .bk-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 14px; }
  .bk-toc { position: absolute; z-index: 20; height: calc(100vh - 50px); }
  .bk-title { display: none; }
}