/* ═══════════════════════════════════════════════════════════════════════════
 * SALES TAX CALCULATOR — sales-tax-calc.css
 * Namespace: stc- (sales tax calculator)
 * All selectors scoped under .stc-wrap to prevent conflicts
 * ═══════════════════════════════════════════════════════════════════════════ */

/* ── SCOPE & RESET ──────────────────────────────────────────────────────── */
.stc-wrap *,
.stc-wrap *::before,
.stc-wrap *::after {
  box-sizing: border-box;
}

.stc-wrap {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--clr-text-primary, #0f172a);
}

/* ── WIDGET HEADING ─────────────────────────────────────────────────────── */
.stc-widget-heading {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--clr-text-primary, #0f172a);
  margin: 0 0 1rem;
  padding-bottom: .6rem;
  border-bottom: 2px solid var(--clr-accent-light, #e0f2fe);
}

/* ── MODE TOGGLE (Calculate / Reverse / Deduct) ─────────────────────────── */
.stc-mode-bar {
  display: flex;
  background: var(--clr-bg-muted, #f1f5f9);
  border-radius: 10px;
  padding: 3px;
  gap: 3px;
  margin-bottom: 1.1rem;
}
.stc-mode-btn {
  flex: 1;
  padding: .38rem .5rem;
  border: none;
  border-radius: 8px;
  font-size: .73rem;
  font-weight: 600;
  color: var(--clr-text-muted, #94a3b8);
  background: transparent;
  cursor: pointer;
  transition: background .18s, color .18s, box-shadow .18s;
  white-space: nowrap;
  text-align: center;
}
.stc-mode-btn.stc-active {
  background: var(--clr-bg, #fff);
  color: var(--clr-accent-dark, #0369a1);
  box-shadow: 0 1px 4px rgba(14,165,233,.12);
}
.stc-mode-btn:hover:not(.stc-active) {
  background: var(--clr-accent-hover, #bae6fd);
  color: var(--clr-accent-dark, #0369a1);
}

/* ── SECTION LABEL ──────────────────────────────────────────────────────── */
.stc-section-label {
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--clr-accent-dark, #0369a1);
  margin: 0 0 .65rem;
  padding-bottom: .35rem;
  border-bottom: 1.5px solid var(--clr-accent-light, #e0f2fe);
}

/* ── MAIN GRID ──────────────────────────────────────────────────────────── */
.stc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  align-items: start;
}
@media (max-width: 820px) {
  .stc-grid { grid-template-columns: 1fr; }
}

/* ── INPUT PANEL ────────────────────────────────────────────────────────── */
.stc-inputs-panel {
  display: flex;
  flex-direction: column;
  gap: .7rem;
}

.stc-field {
  display: flex;
  flex-direction: column;
  gap: .26rem;
}

.stc-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: .775rem;
  font-weight: 600;
  color: var(--clr-text-secondary, #475569);
}

.stc-label-hint {
  font-size: .68rem;
  font-weight: 400;
  color: var(--clr-text-muted, #94a3b8);
}

.stc-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.stc-prefix,
.stc-suffix {
  position: absolute;
  font-size: .8rem;
  font-weight: 600;
  color: var(--clr-text-muted, #94a3b8);
  pointer-events: none;
  user-select: none;
  z-index: 1;
}
.stc-prefix { left: .65rem; }
.stc-suffix { right: .65rem; }

.stc-input {
  width: 100%;
  padding: .5rem .65rem;
  border: 1.5px solid var(--clr-border, #e2e8f0);
  border-radius: 8px;
  font-size: .85rem;
  font-weight: 500;
  color: var(--clr-text-primary, #0f172a);
  background: var(--clr-bg, #fff);
  transition: border-color .18s, box-shadow .18s;
  -moz-appearance: textfield;
}
.stc-input::-webkit-outer-spin-button,
.stc-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.stc-input:focus {
  outline: none;
  border-color: var(--clr-accent, #0ea5e9);
  box-shadow: var(--shadow-focus, 0 0 0 4px rgba(14,165,233,.15));
}
.stc-input.stc-has-prefix { padding-left: 1.75rem; }
.stc-input.stc-has-suffix { padding-right: 2rem; }

/* Select */
.stc-select {
  width: 100%;
  padding: .5rem .65rem;
  padding-right: 2rem;
  border: 1.5px solid var(--clr-border, #e2e8f0);
  border-radius: 8px;
  font-size: .83rem;
  font-weight: 500;
  color: var(--clr-text-primary, #0f172a);
  background: var(--clr-bg, #fff);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' stroke='%2394a3b8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .65rem center;
  cursor: pointer;
  transition: border-color .18s, box-shadow .18s;
}
.stc-select:focus {
  outline: none;
  border-color: var(--clr-accent, #0ea5e9);
  box-shadow: var(--shadow-focus, 0 0 0 4px rgba(14,165,233,.15));
}

/* Rate display badge next to select */
.stc-rate-display {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-top: .3rem;
}
.stc-rate-badge {
  display: inline-flex;
  align-items: center;
  gap: .28rem;
  background: var(--clr-accent-light, #e0f2fe);
  color: var(--clr-accent-dark, #0369a1);
  font-size: .7rem;
  font-weight: 700;
  padding: .22rem .55rem;
  border-radius: 20px;
  white-space: nowrap;
}
.stc-rate-breakdown {
  font-size: .67rem;
  color: var(--clr-text-muted, #94a3b8);
}

/* Two-col field row */
.stc-field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .6rem;
}

/* Divider */
.stc-divider {
  height: 1px;
  background: var(--clr-border-soft, #f1f5f9);
  margin: .2rem 0;
}

/* Tip box */
.stc-tip {
  background: var(--clr-warning-bg, #fffbeb);
  border: 1px solid var(--clr-warning-brd, #fde68a);
  border-radius: 8px;
  padding: .5rem .65rem;
  font-size: .7rem;
  color: var(--clr-warning-text, #b45309);
  line-height: 1.5;
}
.stc-tip strong { font-weight: 700; }

/* Hidden fields toggled by JS */
.stc-hidden { display: none !important; }

/* Buttons */
.stc-btn-row {
  display: flex;
  gap: .6rem;
  margin-top: .4rem;
}
.stc-btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .55rem 1rem;
  border-radius: 8px;
  font-size: .82rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background .18s, transform .1s;
}
.stc-btn:active { transform: scale(.97); }
.stc-btn-primary {
  background: var(--clr-accent, #0ea5e9);
  color: #fff;
  flex: 1;
  justify-content: center;
}
.stc-btn-primary:hover { background: #0284c7; }
.stc-btn-clear {
  background: var(--clr-bg-muted, #f1f5f9);
  color: var(--clr-text-secondary, #475569);
  border: 1.5px solid var(--clr-border, #e2e8f0);
}
.stc-btn-clear:hover { background: var(--clr-border, #e2e8f0); }

/* ── RESULTS PANEL ──────────────────────────────────────────────────────── */
.stc-results-panel {
  display: flex;
  flex-direction: column;
  gap: .85rem;
}

/* Summary Cards */
.stc-cards-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .5rem;
}

.stc-card {
  background: var(--clr-bg-soft, #f8fafc);
  border: 1.5px solid var(--clr-border, #e2e8f0);
  border-radius: 10px;
  padding: .62rem .72rem;
  display: flex;
  flex-direction: column;
  gap: .15rem;
}
.stc-card.stc-card-primary {
  grid-column: 1 / -1;
  background: var(--clr-accent-light, #e0f2fe);
  border-color: var(--clr-accent, #0ea5e9);
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}
.stc-card-label {
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--clr-text-muted, #94a3b8);
}
.stc-card.stc-card-primary .stc-card-label {
  color: var(--clr-accent-dark, #0369a1);
  font-size: .72rem;
}
.stc-card-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-text-primary, #0f172a);
}
.stc-card.stc-card-primary .stc-card-value {
  font-size: 1.5rem;
  color: var(--clr-accent-dark, #0369a1);
}
.stc-card-sub {
  font-size: .67rem;
  color: var(--clr-text-muted, #94a3b8);
}

/* ── STACKED BAR CHART ──────────────────────────────────────────────────── */
.stc-chart-wrap {
  background: var(--clr-bg-soft, #f8fafc);
  border: 1.5px solid var(--clr-border, #e2e8f0);
  border-radius: 10px;
  padding: .75rem .8rem;
}
.stc-chart-title {
  font-size: .7rem;
  font-weight: 700;
  color: var(--clr-text-secondary, #475569);
  margin-bottom: .65rem;
  text-transform: uppercase;
  letter-spacing: .05em;
}

/* Stacked horizontal bar */
.stc-bar-track {
  height: 28px;
  border-radius: 7px;
  overflow: hidden;
  display: flex;
  margin-bottom: .55rem;
  background: var(--clr-bg-muted, #f1f5f9);
}
.stc-bar-seg {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .67rem;
  font-weight: 700;
  color: #fff;
  transition: width .45s cubic-bezier(.4,0,.2,1);
  overflow: hidden;
  white-space: nowrap;
  min-width: 0;
}
.stc-bar-seg span { padding: 0 .3rem; }

/* SVG donut (compact) */
.stc-donut-row {
  display: flex;
  align-items: center;
  gap: .85rem;
  margin-top: .4rem;
}
.stc-donut-svg-wrap {
  position: relative;
  flex-shrink: 0;
}
.stc-donut-svg { display: block; }
.stc-donut-center {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  text-align: center;
  pointer-events: none;
}
.stc-donut-center-lbl {
  display: block;
  font-size: .52rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--clr-text-muted, #94a3b8);
}
.stc-donut-center-val {
  display: block;
  font-size: .82rem;
  font-weight: 700;
  color: var(--clr-text-primary, #0f172a);
}

.stc-donut-legend {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: .38rem;
}
.stc-leg-item {
  display: flex;
  align-items: center;
  gap: .38rem;
}
.stc-leg-dot {
  width: 9px;
  height: 9px;
  border-radius: 2px;
  flex-shrink: 0;
}
.stc-leg-name {
  font-size: .7rem;
  color: var(--clr-text-secondary, #475569);
  font-weight: 500;
  flex: 1;
}
.stc-leg-val {
  font-size: .7rem;
  font-weight: 700;
  color: var(--clr-text-primary, #0f172a);
}
.stc-leg-pct {
  font-size: .65rem;
  color: var(--clr-text-muted, #94a3b8);
  margin-left: .2rem;
}

/* ── STATE TABLE (all-state comparison) ────────────────────────────────── */
.stc-state-table-wrap {
  max-height: 220px;
  overflow-y: auto;
  border-radius: 8px;
  border: 1.5px solid var(--clr-border, #e2e8f0);
  font-size: .71rem;
  margin-top: .2rem;
}
.stc-state-table-wrap::-webkit-scrollbar { width: 4px; }
.stc-state-table-wrap::-webkit-scrollbar-thumb {
  background: var(--clr-border, #e2e8f0);
  border-radius: 2px;
}
.stc-state-table {
  width: 100%;
  border-collapse: collapse;
}
.stc-state-table thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--clr-bg-muted, #f1f5f9);
  padding: .35rem .5rem;
  text-align: left;
  font-size: .67rem;
  font-weight: 700;
  color: var(--clr-text-secondary, #475569);
  text-transform: uppercase;
  letter-spacing: .04em;
  border-bottom: 1.5px solid var(--clr-border, #e2e8f0);
  white-space: nowrap;
}
.stc-state-table thead th:not(:first-child) { text-align: right; }
.stc-state-table tbody td {
  padding: .3rem .5rem;
  border-bottom: 1px solid var(--clr-border-soft, #f1f5f9);
  color: var(--clr-text-secondary, #475569);
}
.stc-state-table tbody td:not(:first-child) { text-align: right; }
.stc-state-table tbody tr:last-child td { border-bottom: none; }
.stc-state-table tbody tr:nth-child(even) td {
  background: var(--clr-bg-soft, #f8fafc);
}
.stc-state-table tbody tr.stc-row-active td {
  background: var(--clr-accent-light, #e0f2fe) !important;
  font-weight: 700;
  color: var(--clr-accent-dark, #0369a1);
}
.stc-td-rate  { font-weight: 700; color: var(--clr-accent-dark, #0369a1); }
.stc-td-tax   { color: var(--clr-interest, #fbbf24); font-weight: 700; }
.stc-td-total { font-weight: 700; color: var(--clr-text-primary, #0f172a); }

/* ── REVERSE / DEDUCT RESULT HIGHLIGHT ─────────────────────────────────── */
.stc-reverse-note {
  background: var(--clr-bg-muted, #f1f5f9);
  border-left: 3px solid var(--clr-teal, #14b8a6);
  border-radius: 0 8px 8px 0;
  padding: .5rem .7rem;
  font-size: .75rem;
  color: var(--clr-text-secondary, #475569);
  line-height: 1.55;
}
.stc-reverse-note strong {
  color: var(--clr-teal, #14b8a6);
  font-weight: 700;
}

/* ── ARTICLE FORMULA ────────────────────────────────────────────────────── */
.stc-wrap .formula-block {
  background: var(--clr-bg-muted, #f1f5f9);
  border-left: 3px solid var(--clr-teal, #14b8a6);
  padding: .65rem .9rem;
  border-radius: 0 8px 8px 0;
  font-family: 'Courier New', monospace;
  font-size: .83rem;
  color: var(--clr-text-primary, #0f172a);
  margin: .7rem 0;
  overflow-x: auto;
}

/* ── RESPONSIVE ─────────────────────────────────────────────────────────── */
@media (max-width: 520px) {
  .stc-cards-grid { grid-template-columns: 1fr; }
  .stc-card.stc-card-primary { flex-direction: column; align-items: flex-start; }
  .stc-field-row { grid-template-columns: 1fr; }
  .stc-donut-row { flex-direction: column; }
  .stc-mode-btn { font-size: .66rem; padding: .35rem .3rem; }
}