/**
 * Time Series Retrieval directory.
 * Desktop (>=1024px): Miller columns. Small screens: collapsible tree.
 */

.tsr {
  --tsr-border: #d0d7de;
  --tsr-accent: #0f599a;
  --tsr-active-bg: #e7f0f8;
  --tsr-hover-bg: #f2f5f8;
  margin: 0 0 2rem;
}

/* Breadcrumb */
.tsr-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 0.5rem;
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}
.tsr-crumb {
  color: #333;
}
.tsr-crumb--root,
button.tsr-crumb {
  background: none;
  border: 0;
  padding: 0;
  color: var(--tsr-accent);
  cursor: pointer;
  font: inherit;
  text-decoration: underline;
}
.tsr-crumb__sep {
  color: #888;
}

/* ---------- Miller columns (desktop) ---------- */
.tsr-browser--columns {
  display: flex;
  align-items: stretch;
  gap: 0;
  border: 1px solid var(--tsr-border);
  border-radius: 4px;
  overflow-x: auto;
  min-height: 320px;
  max-height: 60vh;
}
.tsr-col {
  flex: 0 0 16rem;
  border-right: 1px solid var(--tsr-border);
  overflow-y: auto;
}
.tsr-col:last-child {
  border-right: 0;
}
.tsr-col__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.tsr-col__list li {
  margin: 0;
}
.tsr-col__item,
.tsr-col .tsr-series {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  border-bottom: 1px solid #eef1f4;
  padding: 0.6rem 0.85rem;
  font: inherit;
  cursor: pointer;
  color: #1a1a1a;
  text-decoration: none;
}
.tsr-col__item.has-children::after {
  content: "›";
  color: #888;
  margin-left: 0.5rem;
}
.tsr-col__item:hover,
.tsr-col .tsr-series:hover {
  background: var(--tsr-hover-bg);
}
.tsr-col__item.is-active {
  background: var(--tsr-active-bg);
  font-weight: 600;
}
.tsr-col .tsr-series {
  color: var(--tsr-accent);
}

/* ---------- Collapsible tree (mobile) ---------- */
.tsr-browser--tree {
  border: 1px solid var(--tsr-border);
  border-radius: 4px;
  padding: 0.25rem 0;
}
.tsr-tree__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
/* Indent nested levels. */
.tsr-tree__list .tsr-tree__list {
  margin-left: 1rem;
  border-left: 1px solid #e3e8ee;
}
.tsr-tree__item {
  margin: 0;
}
.tsr-tree__toggle {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  padding: 0.65rem 0.75rem;
  font: inherit;
  cursor: pointer;
  color: #1a1a1a;
}
.tsr-tree__toggle:hover {
  background: var(--tsr-hover-bg);
}
.tsr-tree__caret {
  flex: 0 0 0.9em;
  width: 0.9em;
  height: 0.9em;
  position: relative;
}
.tsr-tree__toggle.has-children .tsr-tree__caret::before {
  content: "+";
  position: absolute;
  inset: 0;
  text-align: center;
  line-height: 0.9em;
  font-weight: 700;
  color: var(--tsr-accent);
}
.tsr-tree__toggle.has-children[aria-expanded="true"] .tsr-tree__caret::before {
  content: "−";
}
.tsr-tree__toggle.is-leaf .tsr-tree__caret::before {
  content: "•";
  position: absolute;
  inset: 0;
  text-align: center;
  color: #aaa;
}
.tsr-tree__toggle.is-loading .tsr-tree__caret::before {
  content: "…";
}
.tsr-tree__item .tsr-series {
  display: block;
  padding: 0.6rem 0.75rem 0.6rem 2.1rem;
  color: var(--tsr-accent);
  text-decoration: none;
}
.tsr-tree__item .tsr-series:hover {
  background: var(--tsr-hover-bg);
  text-decoration: underline;
}

/* ---------- Detail pane ---------- */
.tsr-detail {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 2px solid var(--tsr-border);
}
.tsr-detail__hint {
  color: #666;
  font-style: italic;
}

/* Search box */
.tsr-search {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.tsr-search__input {
  flex: 1 1 auto;
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--tsr-border);
  border-radius: 4px;
  font: inherit;
}
.tsr-search__btn {
  flex: 0 0 auto;
  padding: 0.6rem 1.25rem;
  border: 1px solid var(--tsr-accent);
  border-radius: 4px;
  background: var(--tsr-accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.tsr-search__btn:hover {
  background: #0c4778;
}

/* Search results */
.tsr-search__summary {
  margin: 0.5rem 0 1rem;
  color: #333;
}
.tsr-results {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--tsr-border);
  border-radius: 4px;
}
.tsr-result {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #eef1f4;
}
.tsr-result:last-child {
  border-bottom: 0;
}
.tsr-result__title {
  display: block;
  color: var(--tsr-accent);
  font-weight: 600;
  text-decoration: none;
}
.tsr-result__title:hover {
  text-decoration: underline;
}
.tsr-result__path {
  display: block;
  margin-top: 0.15rem;
  color: #666;
  font-size: 0.9rem;
}
.tsr-search__empty,
.tsr-search__back {
  margin-top: 1rem;
}

/* Back to top (mobile only) */
.tsr-backtop {
  display: none;
  width: 100%;
  margin-top: 1.5rem;
  padding: 0.85rem;
  background: none;
  border: 1px solid var(--tsr-border);
  border-radius: 4px;
  color: var(--tsr-accent);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.tsr-backtop:hover {
  background: var(--tsr-hover-bg);
}
.tsr-backtop__caret {
  margin-right: 0.35rem;
}

/* Show the right layout per breakpoint even before JS toggles classes. */
.tsr-browser--columns { display: flex; }
@media screen and (max-width: 1023px) {
  .tsr-browser--columns { display: block; }
  .tsr-backtop { display: block; }
}