/* /tools/vat/ — page styles built on the shared design tokens in /assets/css/site.css */

/* Tabs bar ---------------------------------------------------------------- */
.vat-tabs-bar {
  display: flex;
  margin-bottom: clamp(1.25rem, 1rem + 1vw, 2rem);
  max-width: 100%;
}
.vat-tabs-bar .tab { white-space: nowrap; }

/* Small "cell reference" chip used in panel titles */
.panel-cell {
  display: inline-grid;
  place-items: center;
  min-width: 2.1rem;
  height: 1.6rem;
  padding: 0 0.4rem;
  border-radius: var(--radius-xs);
  border: 1px solid var(--accent-soft-strong);
  background: var(--accent-soft);
  color: var(--accent-text);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0;
  flex: none;
}

/* Quick amount buttons */
.quick-row { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.quick-row .btn { font-variant-numeric: tabular-nums; border: 1px solid var(--border); }

.vat-fraction { min-height: 1.45em; margin: 0; }
.vat-fraction:empty { display: none; }

.rate-chips .chip span { font-variant-numeric: tabular-nums; }

/* Split bar (two segments, 2px surface gap between them) ------------------ */
.split {
  display: flex;
  gap: 2px;
  height: 12px;
  border-radius: var(--radius-pill);
  overflow: hidden;
}
.split-seg {
  display: block;
  flex: 0 0 calc(var(--w, 50%) - 1px);
  min-width: 0;
  height: 100%;
  border-radius: 4px;
  transition: flex-basis var(--dur-slow) var(--ease), background-color var(--dur) var(--ease);
}
.split .seg-1 { background: var(--chart-1); }
.split .seg-2 { background: var(--chart-3); }
.split-seg.is-zero { flex-basis: 0; margin-left: -2px; }
.split.is-empty .split-seg { background: var(--surface-2); outline: 1px solid var(--border); outline-offset: -1px; }
/* A loss gets the reserved danger colour plus a hatched texture, so it never relies on colour alone */
.split.is-loss .seg-2 {
  background:
    repeating-linear-gradient(135deg, transparent 0 4px, color-mix(in srgb, var(--bg) 35%, transparent) 4px 6px),
    var(--danger);
}
.legend-val { color: var(--text); font-family: var(--font-mono); font-size: var(--fs-xs); font-variant-numeric: tabular-nums; }

/* Loss row in the ledger */
.ledger .is-loss dd { color: var(--danger); border-bottom-color: var(--danger); }

/* Excel formula card */
.fx-card pre { white-space: pre-wrap; word-break: break-word; }
.fx-card code { font-family: var(--font-mono); }

/* Margin explainer */
.peeve { margin: 0; }

/* Percentages ------------------------------------------------------------- */
.pc-grid {
  display: grid;
  gap: clamp(0.9rem, 0.6rem + 1vw, 1.25rem);
  grid-template-columns: minmax(0, 1fr);
}
@media (min-width: 720px) {
  .pc-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1100px) {
  .pc-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
.pc-card { display: grid; gap: 0.9rem; align-content: start; }
.pc-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: var(--fs-md);
  font-weight: 640;
  letter-spacing: -0.015em;
  line-height: 1.3;
  margin: 0;
}
.pc-sentence {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: end;
  gap: 0.6rem;
}
.pc-word {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--text-muted);
  padding-bottom: 0.8rem;
  text-align: center;
}
.pc-sentence .input { font-variant-numeric: tabular-nums; }
.pc-result {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border);
  min-width: 0;
}
.pc-eq { font-family: var(--font-mono); color: var(--text-faint); font-size: 1.25rem; }
.pc-out {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(1.6rem, 1.3rem + 1.2vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}
.pc-card.is-up .pc-out { color: var(--success); }
.pc-card.is-down .pc-out { color: var(--danger); }
.pc-copy { flex: none; border: 1px solid var(--border); }
.pc-sub { margin: 0; min-height: 1.45em; overflow-wrap: anywhere; }
.pc-sub:empty { display: none; }
.pc-card .field-error { margin: 0; }
.pc-tip { background-color: var(--surface-2); }
.pc-tip strong { color: var(--accent-text); font-weight: 650; }

/* Notes ------------------------------------------------------------------- */
.vat-tools { padding-bottom: clamp(2rem, 1.5rem + 2vw, 3rem); }
.notes-grid {
  display: grid;
  gap: clamp(2rem, 1.5rem + 2vw, 3rem);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}
@media (min-width: 960px) {
  .notes-grid { grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); }
}
.notes-grid .callout { margin: 0; }
.tip-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
  color: var(--text-muted);
}
.tip-list li { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 0.9rem; }
.tip-list li > span:last-child { flex: 1 1 14rem; min-width: 0; }

/* Narrow phones: stack the "X of Y" sentence fields */
@media (max-width: 380px) {
  .pc-sentence { grid-template-columns: minmax(0, 1fr); }
  .pc-word { padding: 0; text-align: left; }
  .segmented-options.is-full { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  .split-seg { transition: none; }
}

/* When the segmented options wrap onto two rows on small screens, a softer radius looks tidier */
@media (max-width: 560px) {
  .vat-tools .segmented-options.is-full { border-radius: var(--radius-lg); }
}

/* Phones: the three tabs share the full width so none hide off the edge */
@media (max-width: 479px) {
  .vat-tabs-bar .tabs { width: 100%; }
  .vat-tabs-bar .tab { flex: 1 1 auto; padding: 0 0.55rem; font-size: 0.85rem; }
}