.library-tools {
  display: grid;
  margin: -50px 0 82px;
  padding: 18px 0;
  grid-template-columns: 1fr minmax(220px, .5fr);
  gap: 20px 42px;
  align-items: end;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.track-filter { display: flex; flex-wrap: wrap; gap: 7px; }
.track-filter button {
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font: 500 9px/1 var(--mono);
  text-transform: uppercase;
}
.track-filter button:hover { color: var(--blue); border-color: var(--blue); }
.track-filter button.is-active { color: var(--white); border-color: var(--blue); background: var(--blue); }
.search-label { display: grid; gap: 6px; }
.search-label span { color: var(--muted); font: 500 9px/1 var(--mono); text-transform: uppercase; }
.search-label input {
  width: 100%;
  height: 35px;
  padding: 0;
  border: 0;
  border-bottom: 1px solid var(--ink);
  border-radius: 0;
  color: var(--ink);
  background: transparent;
  outline: 0;
  font: 500 12px/1 var(--body);
}
.search-label input:focus { border-color: var(--blue); box-shadow: 0 2px 0 var(--blue); }
.search-label input::placeholder { color: var(--muted); }
#filter-status { grid-column: 1 / -1; margin: 0; color: var(--muted); font: 400 9px/1 var(--mono); }
.lesson-status { margin-left: auto; color: var(--muted); font: 400 9px/1 var(--mono); text-transform: uppercase; }
.index-rail { max-height: calc(100svh - 60px); overflow-y: auto; scrollbar-width: thin; }

@media (max-width: 720px) {
  .library-tools { margin-top: -28px; grid-template-columns: 1fr; gap: 20px; }
  .track-filter { display: grid; grid-template-columns: repeat(3, 1fr); }
  .track-filter button { padding: 0 5px; }
  .lesson-status { width: 100%; margin: 4px 0 0; }
  .index-rail { max-height: none; overflow: visible; }
}