/* ===========================================================================
   LIBRARY — the scale catalogue, comparison, custom scales, notes.
   Loaded after cipher.css, which owns the tokens.

   The catalogue is set as an index: rows and rules, not tiles. A reader should
   be able to scan eighty-seven entries without the page shouting.
   =========================================================================== */

/* ------------------------------------------------------------ filter bar */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0 clamp(16px, 2.2vw, 30px);
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 4px;
}
.filter-actions { display: flex; align-items: center; gap: 16px; margin-bottom: 14px; }
.filter-actions .check { margin-bottom: 0; }

/* ------------------------------------------------------------- catalogue */

.scale-rail { max-height: 460px; overflow-y: auto; padding-right: 4px; }
.scale-rail::-webkit-scrollbar { width: 10px; }
.scale-rail::-webkit-scrollbar-track { background: transparent; }
.scale-rail::-webkit-scrollbar-thumb { background: var(--line-soft); }
.scale-rail::-webkit-scrollbar-thumb:hover { background: var(--fg-3); }

.cat { margin-bottom: 2px; }

.cat-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  width: 100%;
  background: none;
  border: 0;
  border-bottom: 1px solid var(--line-soft);
  padding: 12px 2px 10px;
  cursor: pointer;
  color: var(--fg);
  font-family: var(--f-sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  text-align: left;
  transition: color .16s var(--ease);
}
.cat-head:hover { color: var(--green); }

/* A short keyline in the category hue: an index mark, not decoration. */
.cat-dot {
  width: 16px;
  height: 2px;
  background: var(--cat, var(--fg));
  flex: none;
  align-self: center;
  transition: width .16s var(--ease);
}
.cat-name { flex: 1; }
.cat-count { font-family: var(--f-mono); font-size: 11px; color: var(--fg-3); letter-spacing: .04em; }
/* Open sections are marked structurally as well as by weight. */
.cat-head[aria-expanded="true"] { border-bottom-color: var(--line); }
.cat-head[aria-expanded="true"] .cat-dot { width: 30px; }

.cat-blurb, .cat-standing {
  margin: 12px 0 4px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--fg-2);
  max-width: 68ch;
}
.cat-standing {
  margin-bottom: 14px;
  font-size: 13px;
  font-style: italic;
  color: var(--fg-3);
}

.scale-btn {
  display: grid;
  grid-template-columns: minmax(0, 15rem) minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 4px 20px;
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  border-bottom: 1px solid var(--line-hair);
  padding: 9px 2px;
  color: var(--fg-2);
  font-family: var(--f-sans);
  cursor: pointer;
  transition: color .14s var(--ease), background .14s var(--ease);
}
.scale-btn:hover { color: var(--fg); background: rgba(216, 222, 219, .035); }
.scale-btn[aria-pressed="true"] { color: var(--green); background: rgba(86, 217, 138, .07); }

.scale-btn-top { display: contents; }
.scale-btn-name { font-family: var(--f-sans); font-size: 13px; letter-spacing: .02em; }
/* Selected entries carry a printed marker, not only a tint. */
.scale-btn[aria-pressed="true"] .scale-btn-name::before {
  content: "▸ ";
  color: var(--green);
}
.scale-btn-count {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--fg-3);
  text-align: right;
  grid-column: 3;
}

.scale-btn-formula {
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--fg-3);
  letter-spacing: .02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  grid-column: 2;
  grid-row: 1;
}
.scale-btn-reason {
  grid-column: 1 / -1;
  font-size: 12.5px;
  font-style: italic;
  color: var(--green);
}
.scale-btn-flag {
  grid-column: 1 / -1;
  justify-self: start;
  font-family: var(--f-sans);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--fg-3);
  border: 1px solid var(--line-soft);
  padding: 1px 7px;
  margin-top: 3px;
}

/* --------------------------------------------------------------- record */

.facts {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  margin: 0 0 20px;
  font-size: 13.5px;
}
.facts dt {
  font-family: var(--f-sans);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--fg-3);
  padding: 6px 18px 6px 0;
  border-bottom: 1px solid var(--line-hair);
  white-space: nowrap;
}
.facts dd {
  margin: 0;
  padding: 6px 0;
  border-bottom: 1px solid var(--line-hair);
  font-family: var(--f-mono);
  font-size: 12.5px;
  color: var(--fg);
}

.meta-line { margin: 0 0 12px; font-size: 14px; color: var(--fg-2); }
.meta-line b, .meta-source b {
  display: block;
  font-family: var(--f-sans);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-bottom: 3px;
}
.meta-source { margin: 16px 0 0; font-size: 13px; color: var(--fg-3); }

/* Marginal notes, set as editorial asides and marked with a printed sigil. */
.flag {
  border-top: 1px solid var(--line-soft);
  padding: 12px 0 0;
  margin: 0 0 16px;
}
.flag b {
  display: block;
  font-family: var(--f-sans);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  margin-bottom: 6px;
  color: var(--fg-3);
}
.flag p { margin: 0; font-size: 13.5px; line-height: 1.6; color: var(--fg-2); }
.flag-review b::before { content: "※ "; color: var(--green); }
.flag-tradition b::before { content: "† "; color: var(--green-2); }
.flag-related b::before { content: "= "; color: var(--flat); }

.related-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.related-btn {
  background: none;
  border: 1px solid var(--line-soft);
  color: var(--fg-2);
  font-family: var(--f-mono);
  font-size: 11.5px;
  padding: 5px 10px;
  cursor: pointer;
  transition: border-color .14s var(--ease), color .14s var(--ease);
}
.related-btn:hover { color: var(--fg); border-color: var(--line); }

/* ------------------------------------------------------------ comparison */

.compare-chips { display: flex; flex-wrap: wrap; gap: 18px; margin-bottom: 24px; }
.compare-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  border-bottom: 2px solid var(--cat, var(--fg));
  padding: 2px 0 4px;
  font-family: var(--f-mono);
  font-size: 12.5px;
  color: var(--fg);
}
.chip-x {
  background: none; border: 0; color: var(--fg-3);
  font-size: 15px; line-height: 1; padding: 0; cursor: pointer;
}
.chip-x:hover { color: var(--green); }

.table-scroll { overflow-x: auto; margin-bottom: 20px; }

table.compare {
  border-collapse: collapse;
  font-family: var(--f-mono);
  font-size: 13px;
  width: 100%;
}
table.compare th, table.compare td {
  border-bottom: 1px solid var(--line-hair);
  border-right: 1px solid var(--line-hair);
  padding: 7px 8px;
  text-align: center;
  white-space: nowrap;
}
table.compare thead th { border-bottom: 1px solid var(--line); }
.compare-corner, .compare-name {
  text-align: left;
  font-family: var(--f-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--fg-2);
  position: sticky;
  left: 0;
  background: var(--bg);
}
.compare-pc { display: block; font-size: 10px; color: var(--fg-3); }
.compare-generic { display: block; font-size: 12px; color: var(--fg-3); }
table.compare th.is-shared { background: rgba(216, 222, 219, .05); }

/* Shared, unique and disagreeing cells are separated by tone and by a printed
   mark, so the grid still reads with the colour taken away. */
.compare-cell { color: var(--fg-3); }
.compare-cell.is-on { color: var(--fg); }
.compare-cell.is-shared { background: rgba(216, 222, 219, .07); }
.compare-cell.is-unique { background: rgba(86, 217, 138, .13); }
.compare-cell.is-unique::after { content: " •"; color: var(--green); font-size: 10px; }
.compare-cell.is-disagree { box-shadow: inset 0 -2px 0 var(--green); }

.compare-legend { font-size: 12.5px; color: var(--fg-3); margin: 0 0 22px; }
.swatch {
  display: inline-block;
  width: 12px; height: 12px;
  vertical-align: -1px;
  margin: 0 3px 0 14px;
  border: 1px solid var(--line-soft);
}
.swatch-shared { background: rgba(216, 222, 219, .18); }
.swatch-unique { background: rgba(86, 217, 138, .35); }
.swatch-disagree { background: none; box-shadow: inset 0 -3px 0 var(--green); }

.compare-summary { font-size: 14px; color: var(--fg-2); max-width: 72ch; }
.compare-summary p { margin: 0 0 8px; }
.compare-summary b { font-family: var(--f-mono); font-weight: 500; color: var(--fg); }
.compare-aliases { color: var(--fg-3); }

.compare-heading {
  margin: 30px 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--f-sans);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--fg-3);
}
.compare-maps { display: grid; gap: 22px; }
.compare-map h4 {
  margin: 0 0 8px;
  font-family: var(--f-sans);
  font-size: 17px;
  font-weight: 400;
  color: var(--fg);
}
.compare-map-row, .custom-preview-map { display: flex; flex-wrap: wrap; }
.compare-map-cell {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  min-width: 30px;
  padding: 4px 8px 4px 0;
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--fg);
}
.compare-map-cell b { font-size: 9px; font-weight: 400; color: var(--fg-3); letter-spacing: .1em; }

/* ----------------------------------------------------------- custom scale */

.custom-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  gap: 0 clamp(18px, 3vw, 40px);
}

.key-picker {
  display: flex;
  flex-wrap: wrap;
  margin: 8px 0 24px;
  border-left: 1px solid var(--line-hair);
}
.pick {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  min-width: 52px;
  border: 0;
  border-right: 1px solid var(--line-hair);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: transparent;
  padding: 9px 10px 8px;
  cursor: pointer;
  font-family: var(--f-mono);
  font-size: 14px;
  color: var(--fg-2);
  transition: background .14s var(--ease), color .14s var(--ease);
}
.pick-black { background: rgba(0, 0, 0, .5); }
.pick:hover { background: rgba(216, 222, 219, .1); color: var(--fg); }
.pick[aria-pressed="true"] { background: var(--green); color: var(--bg); }
.pick[aria-pressed="true"] .acc-flat,
.pick[aria-pressed="true"] .acc-sharp,
.pick[aria-pressed="true"] .pick-pc { color: var(--bg); }
.pick-pc { font-size: 9px; color: var(--fg-3); letter-spacing: .08em; }

.custom-preview { margin-bottom: 10px; }
.custom-error { color: var(--alert); font-size: 13.5px; margin: 0 0 6px; }

.custom-row {
  display: flex;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid var(--line-hair);
  padding: 11px 0;
}
.custom-open {
  flex: 1;
  min-width: 0;
  text-align: left;
  background: none;
  border: 0;
  color: var(--fg);
  cursor: pointer;
  font-family: var(--f-sans);
  font-size: 16px;
  padding: 0;
}
.custom-open:hover { color: var(--green); }
.custom-formula {
  display: block;
  font-family: var(--f-mono);
  font-size: 11.5px;
  color: var(--fg-3);
  margin-top: 2px;
}

/* --------------------------------------------------------- notes / about */

.standing, .unresolved {
  padding: 14px 0;
  border-bottom: 1px solid var(--line-hair);
  display: grid;
  grid-template-columns: minmax(0, 16rem) minmax(0, 1fr);
  gap: 4px 24px;
  align-items: baseline;
}
.standing b, .unresolved b {
  font-family: var(--f-sans);
  font-size: 17px;
  font-weight: 400;
  color: var(--fg);
}
.standing b::before {
  content: "";
  display: inline-block;
  width: 14px; height: 2px;
  vertical-align: middle;
  margin-right: 9px;
  background: var(--cat, var(--fg-3));
}
.standing-count, .unresolved-status {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--fg-3);
  grid-column: 1;
}
.unresolved b::before { content: "※ "; color: var(--green); }
.standing p, .unresolved p {
  grid-column: 2;
  grid-row: 1 / span 2;
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--fg-2);
  max-width: 70ch;
}

/* ------------------------------------------------------------- responsive */

@media (max-width: 900px) {
  .custom-form { grid-template-columns: 1fr; }
  .scale-btn { grid-template-columns: minmax(0, 1fr) auto; }
  .scale-btn-formula { grid-column: 1 / -1; grid-row: auto; }
  .standing, .unresolved { grid-template-columns: 1fr; }
  .standing p, .unresolved p { grid-column: 1; grid-row: auto; margin-top: 6px; }
  .scale-rail { max-height: none; }
}