/* ==========================================================================
   TrueCalc Pro — calculators.css
   The calculator shell: layout, tabs, fields, result panel, history, tables.
   ========================================================================== */

/* ---------- 1. Shell layout (inputs left, results right) ---------- */
.calc {
  display: grid;
  gap: var(--sp-5);
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  align-items: start;
  padding: var(--sp-5);
  border-radius: var(--r-xl);
  background: var(--glass);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  scroll-margin-top: 90px;
}

.calc--single { grid-template-columns: minmax(0, 1fr); }

@media (max-width: 900px) {
  .calc { grid-template-columns: minmax(0, 1fr); padding: var(--sp-4); }
}

.calc-panel {
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
  padding: clamp(1.1rem, 3vw, 1.75rem);
  border-radius: var(--r-lg);
  background: var(--panel-bg);
  border: 1px solid var(--border);
  min-width: 0;
}

.calc-panel__title,
.calc-result__title {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--text-strong);
  padding-bottom: var(--sp-3);
  border-bottom: 2px solid var(--primary);
}
.calc-result__title { border-bottom-color: var(--accent); }

/* ---------- 2. Tabs (calculator modes) ---------- */
.calc-tabs {
  display: flex;
  gap: var(--sp-1);
  padding: 4px;
  border-radius: var(--r-md);
  background: var(--surface-2);
  border: 1px solid var(--border);
  overflow-x: auto;
  scrollbar-width: none;
}
.calc-tabs::-webkit-scrollbar { display: none; }

.calc-tab {
  flex: 1 1 auto;
  min-height: 44px;
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--r-sm);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  transition: background-color var(--t-fast), color var(--t-fast);
}
.calc-tab:hover { color: var(--text-strong); }
.calc-tab[aria-selected="true"] {
  background: var(--cta-bg);
  color: var(--cta-fg);
  box-shadow: var(--shadow-sm);
}

.calc-tabpanel[hidden] { display: none; }
.calc-tabpanel { display: flex; flex-direction: column; gap: var(--sp-5); }

/* ---------- 3. Fields ---------- */
.field-grid {
  display: grid;
  gap: var(--sp-4);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 190px), 1fr));
}
.field-grid--1 { grid-template-columns: minmax(0, 1fr); }
.field-grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 150px), 1fr)); }

.field { display: flex; flex-direction: column; gap: var(--sp-2); min-width: 0; }
.field--full { grid-column: 1 / -1; }

.field > label,
.field__label {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-strong);
}

.field__hint { font-size: var(--fs-xs); color: var(--text-faint); }

.field__error {
  display: none;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-xs);
  font-weight: 550;
  color: var(--danger);
}
.field__error svg { width: 14px; height: 14px; flex: none; }
.field.has-error .field__error { display: flex; }
.field.has-error .input,
.field.has-error .select { border-color: var(--danger-border); background: var(--danger-bg); }

.input,
.select,
.textarea {
  width: 100%;
  min-height: 50px;
  padding: var(--sp-3) var(--sp-4);
  font-size: var(--fs-base);      /* 16px stops iOS zoom-on-focus */
  color: var(--text-strong);
  background: var(--input-bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  transition: border-color var(--t-fast), box-shadow var(--t-fast), background-color var(--t-fast);
  appearance: none;
  -webkit-appearance: none;
}
.textarea { min-height: 110px; resize: vertical; padding-top: var(--sp-3); }
.input::placeholder, .textarea::placeholder { color: var(--text-faint); }
.input:focus, .select:focus, .textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--input-bg-focus);
  box-shadow: 0 0 0 4px var(--ring);
}
.input:disabled, .select:disabled { opacity: .55; cursor: not-allowed; }

/* Hide the native number spinner — we supply our own steppers where useful */
.input[type="number"]::-webkit-outer-spin-button,
.input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.input[type="number"] { -moz-appearance: textfield; }

.select {
  padding-right: 42px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23A49FC0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 18px;
  cursor: pointer;
}
[data-theme="light"] .select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2356506F' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
}

/* Input with a leading/trailing adornment (currency, %, units) */
.input-group { position: relative; display: flex; align-items: stretch; }
.input-group .input { border-radius: var(--r-md); }
.input-group__affix {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-faint);
  pointer-events: none;
}
.input-group--prefix .input { padding-left: 38px; }
.input-group--prefix .input-group__affix { left: 15px; }
.input-group--suffix .input { padding-right: 46px; }
.input-group--suffix .input-group__affix { right: 15px; }

/* Segmented control (unit switches, yes/no) */
.segmented {
  display: inline-flex;
  padding: 4px;
  gap: 4px;
  border-radius: var(--r-md);
  background: var(--surface-2);
  border: 1px solid var(--border);
}
.segmented button {
  min-height: 40px;
  padding: 0 var(--sp-4);
  border-radius: var(--r-sm);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-muted);
  transition: background-color var(--t-fast), color var(--t-fast);
}
.segmented button[aria-pressed="true"] { background: var(--primary); color: #fff; }

/* Quick-pick chips (tip %, discount %) */
.chips { display: flex; flex-wrap: wrap; gap: var(--sp-2); }
.chip {
  min-height: 44px;
  padding: 0 var(--sp-4);
  border-radius: var(--r-pill);
  border: 1px solid var(--border-strong);
  background: var(--surface-2);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--t-fast);
}
.chip:hover { border-color: var(--border-accent); color: var(--text-strong); }
.chip[aria-pressed="true"] {
  background: var(--cta-bg);
  border-color: var(--cta-bg);
  color: var(--cta-fg);
}

/* Range slider */
.range-row { display: flex; align-items: center; gap: var(--sp-4); }
.range {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: var(--r-pill);
  background: var(--surface-3);
  outline: none;
}
.range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--cta-bg);
  border: 3px solid var(--bg-2);
  box-shadow: 0 0 0 1px var(--border-strong);
  cursor: pointer;
}
.range::-moz-range-thumb {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--cta-bg);
  border: 3px solid var(--bg-2);
  cursor: pointer;
}
.range-value {
  min-width: 68px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-weight: 650;
  color: var(--text-strong);
}

/* Repeatable rows (grade calculator, stacked discounts) */
.row-list { display: grid; gap: var(--sp-3); }
.row-item {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1fr) 44px;
  gap: var(--sp-2);
  align-items: center;
}
.row-item--2col { grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) 44px; }
.row-item .input { min-height: 46px; }
.row-remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: var(--r-md);
  border: 1px solid var(--border);
  color: var(--text-faint);
  transition: all var(--t-fast);
}
.row-remove:hover { color: var(--danger); border-color: var(--danger-border); background: var(--danger-bg); }
.row-remove svg { width: 18px; height: 18px; }
.row-head {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1fr) 44px;
  gap: var(--sp-2);
  font-size: var(--fs-xs);
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-faint);
}
.row-head--2col { grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) 44px; }

@media (max-width: 560px) {
  .row-item, .row-item--2col { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) 44px; }
  .row-item .row-name { grid-column: 1 / -1; }
  .row-head, .row-head--2col { display: none; }
}

/* ---------- 4. Result panel ---------- */
.calc-result {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  padding: clamp(1.1rem, 3vw, 1.75rem);
  border-radius: var(--r-lg);
  background: var(--result-bg);
  border: 1px solid var(--border);
  min-width: 0;
  position: relative;
}

.result-rows { display: grid; gap: var(--sp-3); }

.result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: var(--sp-4) var(--sp-5);
  border-radius: var(--r-md);
  background: var(--result-row);
  color: var(--result-row-text);
  box-shadow: var(--shadow-sm);
}
.result-row__label { font-size: var(--fs-sm); font-weight: 500; }
.result-row__value {
  font-size: var(--fs-lg);
  font-weight: 750;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  text-align: right;
  word-break: break-word;
}
.result-row--primary { background: var(--cta-bg); color: var(--cta-fg); }
.result-row--primary .result-row__value { font-size: var(--fs-xl); }
.result-row--muted { background: var(--surface-2); color: var(--text-strong); box-shadow: none; }

.result-empty {
  display: grid;
  place-items: center;
  gap: var(--sp-3);
  padding: var(--sp-10) var(--sp-4);
  text-align: center;
  color: var(--text-muted);
  font-size: var(--fs-sm);
}
.result-empty svg { width: 40px; height: 40px; color: var(--text-faint); opacity: .7; }

/* Progress bar */
.progress-block { display: grid; gap: var(--sp-2); }
.progress-head {
  display: flex;
  justify-content: space-between;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-strong);
}
.progress {
  height: 10px;
  border-radius: var(--r-pill);
  background: var(--surface-3);
  overflow: hidden;
}
.progress__bar {
  height: 100%;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 420ms cubic-bezier(.4, 0, .2, 1);
  width: 0;
}
.progress__bar--split { background: linear-gradient(90deg, var(--primary-2), var(--accent)); }

/* Category scale (BMI) */
.scale { display: grid; gap: var(--sp-2); }
.scale__track {
  position: relative;
  height: 14px;
  border-radius: var(--r-pill);
  overflow: hidden;
  display: flex;
}
.scale__seg { flex: 1; }
.scale__marker {
  position: absolute;
  top: -5px;
  width: 4px;
  height: 24px;
  border-radius: 2px;
  background: var(--text-strong);
  box-shadow: 0 0 0 2px var(--bg-2);
  transform: translateX(-2px);
  transition: left 420ms cubic-bezier(.4, 0, .2, 1);
}
.scale__legend {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  align-self: flex-start;
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--r-pill);
  font-size: var(--fs-sm);
  font-weight: 650;
}
.pill--success { background: var(--success-bg); color: var(--success); }
.pill--warn    { background: var(--warn-bg);    color: var(--warn); }
.pill--danger  { background: var(--danger-bg);  color: var(--danger); }
.pill--info    { background: var(--tag-bg);     color: var(--tag-fg); }

/* Step-by-step working */
.steps {
  display: grid;
  gap: var(--sp-2);
  padding: var(--sp-4);
  border-radius: var(--r-md);
  background: var(--code-bg);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-muted);
  overflow-x: auto;
}
.steps li { white-space: nowrap; }
.steps li:last-child { color: var(--text-strong); font-weight: 650; }

/* Macro / breakdown bars */
.breakdown { display: grid; gap: var(--sp-3); }
.breakdown__item { display: grid; gap: var(--sp-1); }
.breakdown__top {
  display: flex;
  justify-content: space-between;
  font-size: var(--fs-sm);
  color: var(--text-strong);
  font-weight: 600;
}
.breakdown__bar { height: 8px; border-radius: var(--r-pill); background: var(--surface-3); overflow: hidden; }
.breakdown__fill { height: 100%; border-radius: var(--r-pill); transition: width 420ms cubic-bezier(.4,0,.2,1); }
.fill--protein { background: linear-gradient(90deg, #A78BFA, #7C3AED); }
.fill--carbs   { background: linear-gradient(90deg, #5EEAD4, #2DD4BF); }
.fill--fat     { background: linear-gradient(90deg, #FBBF24, #F59E0B); }

/* Result note */
.result-note {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  padding: var(--sp-4);
  border-radius: var(--r-md);
  background: var(--result-row);
  color: var(--result-row-text);
  font-size: var(--fs-xs);
  line-height: 1.55;
}
.result-note svg { width: 18px; height: 18px; flex: none; margin-top: 1px; opacity: .7; }

/* ---------- 5. Action bar ---------- */
.calc-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--border);
}
.calc-actions .btn { flex: 1 1 auto; min-width: 120px; }

@media (max-width: 480px) {
  .calc-actions .btn { flex: 1 1 calc(50% - var(--sp-2)); min-width: 0; }
}

/* ---------- 6. History ---------- */
.history-list { display: grid; gap: var(--sp-2); }
.history-empty { color: var(--text-muted); font-size: var(--fs-sm); text-align: center; padding: var(--sp-8) 0; }

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  width: 100%;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--r-md);
  border: 1px solid var(--border);
  background: var(--surface);
  text-align: left;
  transition: border-color var(--t-fast), background-color var(--t-fast);
}
.history-item:hover { border-color: var(--border-accent); background: var(--surface-2); }
.history-item__main { min-width: 0; }
.history-item__calc { font-size: var(--fs-xs); color: var(--text-faint); text-transform: uppercase; letter-spacing: .06em; }
.history-item__result {
  font-size: var(--fs-sm);
  font-weight: 650;
  color: var(--text-strong);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.history-item__time { font-size: var(--fs-xs); color: var(--text-faint); flex: none; }

/* ---------- 7. Amortization table + chart ---------- */
.amort-wrap { margin-top: var(--sp-6); }
.amort-table { font-size: var(--fs-xs); font-variant-numeric: tabular-nums; }
.amort-table th, .amort-table td { padding: var(--sp-2) var(--sp-3); text-align: right; border-bottom: 1px solid var(--border); white-space: nowrap; }
.amort-table th:first-child, .amort-table td:first-child { text-align: left; }
.amort-table thead th {
  position: sticky;
  top: 0;
  background: var(--bg-2);
  color: var(--text-strong);
  font-weight: 650;
  z-index: 1;
}
.amort-table tbody tr:hover td { background: var(--surface-2); }
.amort-table .year-row td { background: var(--surface-2); font-weight: 650; color: var(--text-strong); }
.amort-scroll { max-height: 440px; overflow: auto; border: 1px solid var(--border); border-radius: var(--r-md); }

.chart-box {
  position: relative;
  width: 100%;
  padding: var(--sp-4);
  border-radius: var(--r-md);
  background: var(--surface);
  border: 1px solid var(--border);
}
.chart-box svg { width: 100%; height: auto; overflow: visible; }
.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4);
  margin-top: var(--sp-3);
  font-size: var(--fs-xs);
  color: var(--text-muted);
}
.chart-legend span { display: inline-flex; align-items: center; gap: var(--sp-2); }
.chart-legend i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }

/* Donut for interest vs principal */
.donut-wrap { display: flex; align-items: center; gap: var(--sp-5); flex-wrap: wrap; }
.donut { width: 132px; height: 132px; flex: none; }
.donut circle { fill: none; stroke-width: 14; }

/* ---------- 8. Unit converter ---------- */
.conv-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 52px minmax(0, 1fr);
  gap: var(--sp-3);
  align-items: end;
}
@media (max-width: 560px) {
  .conv-row { grid-template-columns: minmax(0, 1fr); }
  .conv-swap { justify-self: center; margin-block: calc(var(--sp-2) * -1); }
}
.conv-swap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px; height: 50px;
  border-radius: var(--r-md);
  border: 1px solid var(--border-strong);
  background: var(--surface-2);
  color: var(--accent-text);
  transition: all var(--t-fast);
}
.conv-swap:hover { background: var(--surface-3); transform: rotate(180deg); }
.conv-swap svg { width: 20px; height: 20px; }

.conv-grid { display: grid; gap: var(--sp-2); grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.conv-quick {
  padding: var(--sp-3);
  border-radius: var(--r-md);
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-size: var(--fs-xs);
  color: var(--text-muted);
  text-align: left;
}
.conv-quick strong { display: block; font-size: var(--fs-sm); color: var(--text-strong); font-variant-numeric: tabular-nums; }

/* ---------- 9. Age calculator specifics ---------- */
.age-grid {
  display: grid;
  gap: var(--sp-3);
  grid-template-columns: repeat(auto-fit, minmax(96px, 1fr));
}
.age-cell {
  padding: var(--sp-4) var(--sp-3);
  border-radius: var(--r-md);
  background: var(--result-row);
  color: var(--result-row-text);
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.age-cell__num { font-size: var(--fs-xl); font-weight: 750; font-variant-numeric: tabular-nums; letter-spacing: -.03em; }
.age-cell__unit { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; opacity: .7; }

.fact-list { display: grid; gap: var(--sp-2); }
.fact-list li {
  display: flex;
  justify-content: space-between;
  gap: var(--sp-3);
  padding: var(--sp-2) 0;
  border-bottom: 1px dashed var(--border);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}
.fact-list li:last-child { border-bottom: 0; }
.fact-list b { color: var(--text-strong); font-weight: 650; }

/* ---------- 10. Usage counter ---------- */
.usage-note {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-xs);
  color: var(--text-faint);
}
.usage-note .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 3px var(--success-bg);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: .35; } }

/* ---------- 11. Skeleton / busy state ---------- */
.calc-result.is-busy .result-rows { opacity: .45; transition: opacity var(--t-fast); }
.spinner {
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 2px solid var(--border-strong);
  border-top-color: var(--accent);
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 12. Print view for a calculation ---------- */
@media print {
  .calc { display: block; background: none !important; border: 0 !important; box-shadow: none !important; padding: 0 !important; }
  .calc-panel { page-break-inside: avoid; margin-bottom: 12mm; }
  .calc-result { page-break-inside: avoid; }
  .calc-tabs, .chips, .row-remove, .conv-swap { display: none !important; }
  .result-row { border: 1px solid #ddd; }
  .amort-scroll { max-height: none; overflow: visible; }
}