/* Formula help (static/js/formula_assist.js): function autocomplete, argument hint card, "All functions" dialog
   and the colours of referenced ranges. */

/* ---------------------------------------------------------------- reference colours
   colorFormulaRefs() returns cssVar: var(--fa-ref-N); .fa-ref-N colours text (outlines can use the variable);
   formulaTextNodes() wraps each reference in <span class="fa-ref fa-ref-N">. */
:root {
  --fa-ref-0: #d56e0c; --fa-ref-1: #1a73e8; --fa-ref-2: #9334e6; --fa-ref-3: #188038;
  --fa-ref-4: #d93025; --fa-ref-5: #0f8b8d; --fa-ref-6: #c2185b; --fa-ref-7: #8d6e63;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --fa-ref-0: #ffa94d; --fa-ref-1: #7cacf8; --fa-ref-2: #c58af9; --fa-ref-3: #5bb974;
    --fa-ref-4: #f28b82; --fa-ref-5: #4ecdc4; --fa-ref-6: #f48fb1; --fa-ref-7: #c4ada5;
  }
}
:root[data-theme="dark"] {
  --fa-ref-0: #ffa94d; --fa-ref-1: #7cacf8; --fa-ref-2: #c58af9; --fa-ref-3: #5bb974;
  --fa-ref-4: #f28b82; --fa-ref-5: #4ecdc4; --fa-ref-6: #f48fb1; --fa-ref-7: #c4ada5;
}
.fa-ref-0 { color: var(--fa-ref-0); } .fa-ref-1 { color: var(--fa-ref-1); }
.fa-ref-2 { color: var(--fa-ref-2); } .fa-ref-3 { color: var(--fa-ref-3); }
.fa-ref-4 { color: var(--fa-ref-4); } .fa-ref-5 { color: var(--fa-ref-5); }
.fa-ref-6 { color: var(--fa-ref-6); } .fa-ref-7 { color: var(--fa-ref-7); }

/* ---------------------------------------------------------------- popups (fixed, appended to <body>) */
.fa-pop { position: fixed; z-index: 970; background: var(--surface); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; box-shadow: var(--shadow-3); font: 13px/1.4 var(--font); text-align: left;
  animation: fa-in .1s ease-out; }
@keyframes fa-in { from { opacity: 0; transform: translateY(-2px); } }
.fa-pop kbd { font-size: 10.5px; padding: 0 4px; line-height: 16px; }

/* autocomplete */
.fa-suggest { display: flex; flex-direction: column; width: 400px; max-width: calc(100vw - 16px); overflow: hidden; }
.fa-suggest-list { position: relative; flex: 1 1 auto; min-height: 0; max-height: 300px; overflow-y: auto; padding: 4px 0; }
.fa-opt { padding: 5px 12px; cursor: pointer; }
.fa-opt:hover { background: var(--surface-2); }
.fa-opt.on { background: var(--accent-weak); }
.fa-opt-line { display: flex; align-items: baseline; min-width: 0; white-space: nowrap; }
.fa-opt-name { flex: none; font: 12.5px/20px var(--mono); font-weight: 600; color: var(--text); }
.fa-opt-name b { font-weight: 700; color: var(--accent); }
.fa-opt-args { min-width: 0; overflow: hidden; text-overflow: ellipsis; font: 12px/20px var(--mono); color: var(--text-3); }
.fa-opt-sum { display: none; margin: 1px 0 2px; font-size: 12.5px; line-height: 1.4; color: var(--text-2); white-space: normal; }
.fa-opt.on .fa-opt-sum { display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 3; line-clamp: 3; overflow: hidden; }
.fa-opt.on .fa-opt-args { color: var(--text-2); }
.fa-suggest-foot { flex: none; display: flex; flex-wrap: wrap; gap: 4px 14px; padding: 5px 12px; font-size: 11.5px;
  color: var(--text-3); background: var(--surface-2); border-top: 1px solid var(--border); }

/* argument hint card */
.fa-hint { width: max-content; min-width: 260px; max-width: min(460px, calc(100vw - 16px)); padding: 6px 6px 8px 12px;
  overflow-y: auto; }
.fa-hint-head { display: flex; align-items: flex-start; gap: 2px; }
.fa-hint-syntax { flex: 1; min-width: 0; padding: 4px 6px 0 0; font: 12.5px/1.55 var(--mono); color: var(--text-2);
  overflow-wrap: anywhere; }
.fa-hint-fn { font-weight: 700; color: var(--text); }
.fa-hint-arg.on { font-weight: 700; color: var(--accent); }
.fa-hint-btn { flex: none; display: inline-grid; place-items: center; width: 26px; height: 26px; padding: 0; border: 0;
  border-radius: 50%; background: transparent; color: var(--text-3); cursor: pointer; }
.fa-hint-btn:hover { background: var(--surface-2); color: var(--text); }
.fa-hint-btn .icon { transition: transform .15s; }
.fa-hint-btn[aria-expanded="true"] .icon { transform: rotate(180deg); }
.fa-hint-warn { margin: 6px 6px 0 0; padding: 4px 8px; border-radius: 6px; font-size: 12.5px; background: var(--danger-weak);
  color: var(--danger); }
.fa-hint-body { display: flex; flex-direction: column; gap: 2px; margin: 6px 6px 0 0; padding-top: 8px;
  border-top: 1px solid var(--border); }
.fa-hint-label { margin-top: 6px; font-size: 11px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  color: var(--text-3); }
.fa-hint-label:first-child { margin-top: 0; }
.fa-hint-text { font-size: 13px; color: var(--text); }
.fa-hint-argname { font: 12.5px var(--mono); font-weight: 700; color: var(--accent); }
.fa-hint-qual { margin-left: 8px; font-size: 12px; color: var(--text-3); }
.fa-hint-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 10px; margin-top: 10px; font-size: 11.5px;
  color: var(--text-3); }
.fa-hint-cat { display: inline-flex; align-items: center; height: 20px; padding: 0 8px; border-radius: 999px;
  background: var(--surface-2); color: var(--text-2); font-weight: 600; }
.fa-hint-keys { margin-left: auto; }
.fa-hint-mini { position: fixed; z-index: 970; display: grid; place-items: center; width: 24px; height: 24px; padding: 0;
  border: 1px solid var(--border-strong); border-radius: 50%; background: var(--surface); color: var(--accent);
  font: 700 13px/1 var(--font); box-shadow: var(--shadow-2); cursor: pointer; }
.fa-hint-mini:hover { background: var(--accent-weak); }

@media (prefers-reduced-motion: reduce) {
  .fa-pop { animation: none; }
  .fa-hint-btn .icon { transition: none; }
}

/* ---------------------------------------------------------------- "All functions" dialog */
.modal.fa-dialog { max-width: 880px; }
.fa-dlg { display: flex; flex-direction: column; gap: 8px; }
.fa-dlg-bar { display: flex; align-items: center; gap: 8px; }
.fa-dlg-search { position: relative; display: block; flex: 1; min-width: 0; }
.fa-dlg-search .icon { position: absolute; left: 11px; top: 50%; transform: translateY(-50%); color: var(--text-3);
  pointer-events: none; }
.fa-dlg-search .input { padding-left: 34px; }
.fa-dlg-cat { flex: none; width: auto; max-width: 230px; }
.fa-dlg-status { display: flex; align-items: center; gap: 12px; min-height: 18px; font-size: 12.5px; color: var(--text-3); }
.fa-dlg-keys { margin-left: auto; }
.fa-dlg-list { position: relative; height: min(56vh, 520px); overflow-y: auto; border: 1px solid var(--border);
  border-radius: 8px; background: var(--surface); }
.fa-dlg-head { position: sticky; top: 0; z-index: 1; display: flex; align-items: center; gap: 8px; padding: 6px 14px;
  font-size: 11.5px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--text-2);
  background: var(--surface-2); border-bottom: 1px solid var(--border); }
.fa-dlg-count { font-weight: 600; letter-spacing: 0; color: var(--text-3); }
.fa-dlg-row { display: grid; grid-template-columns: minmax(120px, 190px) 1fr auto; gap: 2px 16px; align-items: start;
  padding: 8px 14px; border-bottom: 1px solid var(--border); }
.fa-dlg-group:last-child .fa-dlg-row:last-child { border-bottom: 0; }
.fa-dlg-row.pick { cursor: pointer; }
.fa-dlg-row:hover { background: var(--surface-2); }
.fa-dlg-row.on { background: var(--accent-weak); }
.fa-dlg-name { font: 12.5px/1.6 var(--mono); font-weight: 700; color: var(--text); overflow-wrap: anywhere; }
.fa-dlg-info { min-width: 0; }
.fa-dlg-syntax { font: 12px/1.6 var(--mono); color: var(--text-2); overflow-wrap: anywhere; }
.fa-dlg-sum { margin-top: 1px; font-size: 13px; color: var(--text); }
.fa-dlg-insert { align-self: center; font-size: 12.5px; font-weight: 600; color: var(--accent); visibility: hidden; }
.fa-dlg-row.on .fa-dlg-insert, .fa-dlg-row.pick:hover .fa-dlg-insert { visibility: visible; }
.fa-dlg-empty { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
  height: 100%; padding: 24px; text-align: center; color: var(--text-2); }
.fa-mark { padding: 0 1px; border-radius: 2px; color: inherit; background: color-mix(in srgb, var(--accent) 24%, transparent); }

@media (max-width: 600px) {
  .fa-dlg-bar { flex-wrap: wrap; }
  .fa-dlg-cat { width: 100%; max-width: none; }
  .fa-dlg-keys { display: none; }
  .fa-dlg-row { grid-template-columns: 1fr; padding: 8px 12px; }
  .fa-dlg-insert { display: none; }
  .fa-suggest-foot { display: none; }
}