/* ==========================================================================
   Calculator page components: input card, results, formula box, history
   ========================================================================== */

.calc-layout {
  display: grid;
  grid-template-columns: 1.3fr 0.8fr;
  gap: 26px;
  align-items: start;
}
@media (max-width: 1024px) {
  .calc-layout { grid-template-columns: 1fr; }
}

.calc-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 24px;
  min-width: 0;
}
@media (max-width: 480px) {
  .calc-card { padding: 16px; }
  .calc-sub { font-size: 0.84rem; }
}

.calc-card h2 { margin-bottom: 4px; }
.calc-sub { color: var(--color-text-muted); font-size: 0.9rem; margin-bottom: 18px; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 8px;
}
.form-grid.single-col { grid-template-columns: 1fr; }
@media (max-width: 768px) {
  .form-grid { grid-template-columns: 1fr !important; }
  .result-grid { grid-template-columns: 1fr !important; }
}
.field-group { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field-group.full-width { grid-column: 1 / -1; }

.field-group label {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--color-text);
}
.field-hint { font-size: 0.78rem; color: var(--color-text-muted); }

/* Amortization schedule Monthly / Yearly view toggle */
.schedule-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.schedule-head h3 { margin: 0; }
.schedule-toggle { display: inline-flex; border: 1px solid var(--color-border); border-radius: 999px; overflow: hidden; flex-shrink: 0; }
.schedule-toggle button {
  border: 0;
  background: var(--color-surface);
  color: var(--color-text-muted);
  padding: 7px 16px;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
}
.schedule-toggle button.is-active { background: var(--color-header-bg); color: #fff; }
@media (max-width: 480px) {
  .schedule-head { margin-top: 14px; gap: 8px; }
  .schedule-head h3 { font-size: 1rem; }
  .schedule-toggle button { padding: 6px 12px; font-size: 0.78rem; }
}

.field-group input[type="text"],
.field-group input[type="number"],
.field-group input[type="date"],
.field-group select {
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 1rem;
  width: 100%;
}
.field-group input:focus, .field-group select:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(58, 15, 94, 0.15);
}
.field-group input[aria-invalid="true"] {
  border-color: var(--color-danger);
}
.field-group input[inputmode="decimal"],
.field-group input[inputmode="numeric"],
.field-group input[type="date"] {
  font-family: var(--font-mono);
  font-weight: 500;
}
.field-error {
  font-size: 0.8rem;
  color: var(--color-danger);
  min-height: 1.1em;
  display: block;
}

/* Loan/EMI calculators: uppercase labels + currency-prefixed amount inputs */
.loan-style .field-group label {
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  font-weight: 700;
  color: var(--color-text-muted);
}
.loan-style .input-prefix { position: relative; }
.loan-style .input-prefix .prefix-symbol {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  pointer-events: none;
}
.loan-style .input-prefix input { padding-left: 28px; }

.input-suffix-group { position: relative; }
.input-suffix-group .suffix {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  font-size: 0.85rem;
  pointer-events: none;
}

.radio-row { display: flex; gap: 14px; flex-wrap: wrap; }
.radio-row label { display: flex; align-items: center; gap: 6px; font-weight: 600; font-size: 0.9rem; }

.calc-actions { display: flex; gap: 12px; margin-top: 6px; flex-wrap: wrap; }

.calc-error-banner {
  display: none;
  background: var(--color-danger-bg);
  border: 1px solid var(--color-danger);
  color: var(--color-text);
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 0.9rem;
}
.calc-error-banner.is-visible { display: block; }

.result-panel {
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px dashed var(--color-border);
  display: none;
}
.result-panel.is-visible { display: block; }
.result-panel-title { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text-muted); font-weight: 700; margin-bottom: 12px; }

.result-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 14px; margin-bottom: 8px; }
.result-tile {
  background: var(--color-surface-soft);
  border-radius: var(--radius-sm);
  padding: 16px;
}
.result-tile.is-primary { background: var(--color-primary); color: var(--color-primary-contrast); }
.result-tile .result-label { font-size: 0.78rem; color: var(--color-text-muted); font-weight: 700; text-transform: uppercase; letter-spacing: 0.03em; }
.result-tile.is-primary .result-label { color: var(--color-primary-label); }
.result-tile .result-value { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; margin-top: 6px; color: var(--color-primary-dark); word-break: break-word; }
.result-tile.is-primary .result-value { color: #fff; }
@media (max-width: 480px) {
  .result-tile { padding: 12px; }
  .result-tile .result-value { font-size: 1.15rem; }
  .result-tile .result-label { font-size: 0.7rem; }
}

.result-tools { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }

.formula-box {
  background: var(--color-surface-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  margin: 18px 0;
}
.formula-box .formula-eq {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  margin: 10px 0;
  color: var(--color-primary-dark);
}
.formula-box dl { display: grid; grid-template-columns: max-content 1fr; gap: 4px 12px; margin: 10px 0 0; }
.formula-box dt { font-weight: 700; }
.formula-box dd { margin: 0; color: var(--color-text-muted); }

.example-box {
  border-left: 4px solid var(--color-accent);
  background: var(--color-surface-soft);
  padding: 14px 18px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 18px 0;
}

.howto-list { padding-left: 1.2em; }
.howto-list li { margin-bottom: 8px; }

.aside-stack { display: flex; flex-direction: column; gap: 18px; min-width: 0; }
.aside-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px;
}
.aside-card h3 { font-size: 0.95rem; margin-bottom: 10px; }
.aside-card ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.aside-card a { font-weight: 600; font-size: 0.9rem; }

.age-breakdown-list { list-style: none; padding: 0; margin: 10px 0 0; display: flex; flex-direction: column; gap: 4px; }
.age-breakdown-list li { font-size: 0.92rem; color: var(--color-text-muted); }
.age-breakdown-list li strong { color: var(--color-text); font-weight: 700; }

.history-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; max-height: 220px; overflow-y: auto; }
.history-list li { font-size: 0.85rem; border-bottom: 1px solid var(--color-border); padding-bottom: 8px; color: var(--color-text-muted); }
.history-list li strong { color: var(--color-text); }
.history-empty { font-size: 0.85rem; color: var(--color-text-muted); }

.theme-toggle-track {
  position: relative;
}

/* ==========================================================================
   Date select widget — Month / Day / Year dropdowns + calendar-icon button.
   Wraps a real <input type="date"> (see js/date-select.js) so existing
   calculator logic keeps reading/writing that input's value unchanged.
   ========================================================================== */
.date-select {
  display: flex;
  align-items: stretch;
  gap: 6px;
  flex-wrap: nowrap;
}
.date-select .ds-month,
.date-select .ds-day,
.date-select .ds-year {
  min-height: 46px;
  min-width: 0;
  padding: 10px 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.95rem;
}
.date-select .ds-month { flex: 1.3 1 0; }
.date-select .ds-day { flex: 1 1 0; }
.date-select .ds-year { flex: 1.1 1 0; font-family: var(--font-mono); }
.date-select .ds-month:focus,
.date-select .ds-day:focus,
.date-select .ds-year:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(58, 15, 94, 0.15);
}
.date-select .ds-cal-btn {
  flex: 0 0 auto;
  min-height: 46px;
  min-width: 46px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: filter 0.15s;
}
.date-select .ds-cal-btn:hover { filter: brightness(1.1); }
.date-select .ds-native {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
  border: 0;
  padding: 0;
  margin: -1px;
}
.date-select .ds-native.ds-native-fallback-visible {
  position: static;
  width: auto;
  height: 46px;
  opacity: 1;
  pointer-events: auto;
  margin: 8px 0 0;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  flex: 1 1 100%;
}

@media (max-width: 480px) {
  .date-select { gap: 4px; }
  .date-select .ds-cal-btn { min-width: 38px; font-size: 0.9rem; }
  .date-select .ds-month,
  .date-select .ds-day,
  .date-select .ds-year { padding: 10px 4px; font-size: 0.85rem; }
}
@media (max-width: 360px) {
  .date-select { gap: 3px; }
  .date-select .ds-cal-btn { min-width: 34px; font-size: 0.85rem; }
  .date-select .ds-month,
  .date-select .ds-day,
  .date-select .ds-year { padding: 8px 3px; font-size: 0.8rem; }
}

/* ==========================================================================
   Live scientific calculator widget (js/live-calculator.js)
   ========================================================================== */
.live-calc {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  outline: none;
}

.lc-display {
  position: relative;
  background: var(--color-header-bg);
  color: #fff;
  padding: 18px 18px 14px;
  text-align: right;
}
.lc-history-btn {
  position: absolute;
  top: 10px;
  left: 12px;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: background-color 0.15s;
}
.lc-history-btn:hover { background: rgba(255, 255, 255, 0.22); }
.lc-expr {
  min-height: 20px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.65);
  overflow-x: auto;
  white-space: nowrap;
  word-break: break-all;
}
.lc-result {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 700;
  margin-top: 4px;
  overflow-x: auto;
  white-space: nowrap;
}
.lc-result.is-error { color: #ff9fae; font-size: 1.6rem; }

.lc-history-panel {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 5;
  background: var(--color-header-bg);
  color: #fff;
  padding: 44px 16px 14px;
  overflow-y: auto;
}
.lc-history-panel.is-open { display: block; }
.lc-history-empty { color: rgba(255, 255, 255, 0.65); font-size: 0.85rem; margin: 0 0 10px; }
.lc-history-list { list-style: none; margin: 0 0 12px; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.lc-history-item { text-align: right; cursor: pointer; font-family: var(--font-mono); }
.lc-history-expr { display: block; font-size: 0.8rem; color: rgba(255, 255, 255, 0.6); }
.lc-history-eq { display: none; }
.lc-history-val { display: block; font-size: 1.1rem; font-weight: 700; }
.lc-history-item:hover .lc-history-val { color: var(--color-accent); }

.lc-keypad {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  padding: 12px;
  background: var(--color-surface-soft);
}
.lc-key {
  min-height: 46px;
  border: 0;
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s, transform 0.1s;
}
.lc-key:hover { transform: translateY(-1px); }
.lc-key:active { transform: translateY(0); }
.lc-key-digit { background: var(--color-surface); font-weight: 700; }
.lc-key-op { background: var(--color-surface); color: var(--color-primary); font-weight: 700; }
.lc-key-fn { background: var(--color-surface-soft); border: 1px solid var(--color-border); color: var(--color-text-muted); font-size: 0.82rem; }
.lc-key-fn.is-active { background: var(--color-header-bg); border-color: var(--color-header-bg); color: #fff; }
.lc-key-eq { background: var(--color-primary); color: #fff; font-size: 1.15rem; }
.lc-key-eq:hover { background: var(--color-header-bg); }
.lc-key-toggle {
  background: var(--color-surface-soft);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.lc-key-toggle .lc-sep { opacity: 0.4; }
.lc-key-toggle span.is-active { color: var(--color-primary); font-weight: 700; }

@media (max-width: 480px) {
  .lc-result { font-size: 1.9rem; }
  .lc-keypad { gap: 4px; padding: 8px; }
  .lc-key { min-height: 40px; font-size: 0.82rem; }
  .lc-key-fn { font-size: 0.72rem; }
}
@media (max-width: 360px) {
  .lc-keypad { gap: 3px; padding: 6px; }
  .lc-key { min-height: 36px; font-size: 0.74rem; }
  .lc-key-fn { font-size: 0.64rem; }
  .lc-key-toggle { font-size: 0.66rem; gap: 2px; }
  .lc-result { font-size: 1.6rem; }
}

/* ==========================================================================
   Percentage Calculator — compact inline "mini calculator" widgets
   ========================================================================== */
.pct-mini-block {
  background: var(--color-surface-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 14px;
}
.pct-mini { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.pct-label { font-size: 0.92rem; color: var(--color-text); white-space: nowrap; }
.pct-input {
  width: 80px;
  min-height: 40px;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.95rem;
  font-family: var(--font-mono);
}
select.pct-input { font-family: var(--font-sans); width: auto; padding-right: 28px; }
.pct-input.pct-wide { width: 110px; }
.pct-input:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(58, 15, 94, 0.15);
}
.pct-answer { margin: 8px 0 0; font-weight: 700; color: var(--color-heading); min-height: 1.3em; }
.pct-section-title { font-size: 1.05rem; font-weight: 700; color: var(--color-heading); margin: 24px 0 10px; }
.pct-result-banner {
  display: none;
  background: var(--color-header-bg);
  color: #fff;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 8px;
}
.pct-result-banner.is-visible { display: block; }

@media (max-width: 480px) {
  .pct-input { width: 68px; }
  .pct-input.pct-wide { width: 90px; }
}