/* ==========================================================================
   MoneyPathway Calculators Styling
   Interactive controls, synchronized sliders, visual donut charts,
   amortization schedules, formula cards, and FAQ accordions.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Calculator Layouts
   -------------------------------------------------------------------------- */
.calculator-suite-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: var(--space-5);
}

.featured-calc-wrapper {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.calc-split-container {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
}

@media (max-width: 900px) {
  .calc-split-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .calc-number-input {
    width: 118px;
    padding: 8px 10px;
    font-size: var(--text-sm);
  }
  .calc-number-input.has-prefix {
    padding-left: 24px;
  }
  .calc-number-input.has-suffix {
    padding-right: 30px;
  }
  .primary-result-value {
    font-size: 1.9rem;
  }
  .calc-summary-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2);
  }
  .summary-tile {
    padding: var(--space-3);
  }
  .summary-tile-value {
    font-size: 1rem;
  }
  .calc-header-title {
    font-size: 1.15rem;
  }
  .calc-inputs-col,
  .calc-results-col {
    padding: var(--space-5);
  }
  .calc-breakdown-legend {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }
  .preset-btn {
    padding: 5px 10px;
    font-size: 11px;
  }
}

/* Left: Controls Column */
.calc-inputs-col {
  padding: var(--space-8);
  border-right: 1px solid var(--color-border);
}

@media (max-width: 900px) {
  .calc-inputs-col {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-6);
  }
}

/* Right: Results Column */
.calc-results-col {
  padding: var(--space-8);
  background-color: #fcfdfe;
  display: flex;
  flex-direction: column;
}

@media (max-width: 900px) {
  .calc-results-col {
    padding: var(--space-6);
  }
}

/* Header within calculator */
.calc-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.calc-header-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.calc-reset-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 600;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  transition: all var(--transition-fast);
}

.calc-reset-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-border-hover);
  background-color: var(--color-surface-hover);
}

/* --------------------------------------------------------------------------
   Input Groups & Sliders
   -------------------------------------------------------------------------- */
.calc-field-group {
  margin-bottom: var(--space-6);
}

.calc-field-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2);
}

.calc-field-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
}

.calc-input-box-wrapper {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.calc-input-prefix,
.calc-input-suffix {
  position: absolute;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  pointer-events: none;
}

.calc-input-prefix {
  left: 10px;
}

.calc-input-suffix {
  right: 10px;
}

.calc-number-input {
  width: 140px;
  padding: 7px 12px;
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: right;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.calc-number-input.has-prefix {
  padding-left: 26px;
}

.calc-number-input.has-suffix {
  padding-right: 28px;
}

.calc-number-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12);
}

/* Range Slider */
.calc-slider-wrapper {
  margin-top: var(--space-3);
  position: relative;
}

.calc-range-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  background: #e2e8f0;
  outline: none;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.calc-range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ffffff;
  border: 2.5px solid var(--color-accent);
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.calc-range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 2px 5px rgba(15, 118, 110, 0.25);
}

.calc-range-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ffffff;
  border: 2.5px solid var(--color-accent);
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
  transition: transform var(--transition-fast);
}

.calc-slider-scale {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--color-text-subtle);
  margin-top: 6px;
}

/* Preset Buttons */
.calc-presets {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-2);
  flex-wrap: wrap;
}

.preset-btn {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background-color: var(--color-surface-sunken);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.preset-btn:hover {
  background-color: var(--color-surface-hover);
  border-color: var(--color-border-hover);
  color: var(--color-primary);
}

/* Select Dropdown */
.calc-select-input {
  width: 100%;
  padding: 8px 12px;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  cursor: pointer;
}

.calc-select-input:focus {
  border-color: var(--color-accent);
}

/* Toggle Switch */
.calc-toggle-wrapper {
  margin-top: var(--space-1);
}

.calc-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0;
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

.calc-toggle-track {
  position: relative;
  width: 40px;
  height: 22px;
  background-color: #cbd5e1;
  border-radius: var(--radius-full);
  transition: background-color var(--transition-fast);
  flex-shrink: 0;
}

.calc-toggle-btn.active .calc-toggle-track {
  background-color: var(--color-accent);
}

.calc-toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  background-color: #ffffff;
  border-radius: 50%;
  transition: transform var(--transition-fast);
  box-shadow: 0 1px 2px rgba(0,0,0,0.15);
}

.calc-toggle-btn.active .calc-toggle-thumb {
  transform: translateX(18px);
}

.calc-toggle-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Results Display Column
   -------------------------------------------------------------------------- */
.calc-primary-result-box {
  background-color: #f8fafc;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-5);
  margin-bottom: var(--space-4);
  text-align: left;
}

.primary-result-label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin-bottom: 4px;
}

.primary-result-value {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  line-height: 1.15;
}

.primary-result-hint {
  font-size: 11px;
  color: var(--color-text-subtle);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
}

/* Subtle Proportional Breakdown Bar */
.calc-breakdown-wrapper {
  margin: var(--space-4) 0;
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.calc-breakdown-bar {
  display: flex;
  width: 100%;
  height: 10px;
  border-radius: 4px;
  overflow: hidden;
  background-color: #e2e8f0;
  margin-bottom: var(--space-3);
}

.calc-breakdown-bar .breakdown-segment {
  height: 100%;
  transition: width 0.25s ease;
}

.calc-breakdown-bar .breakdown-segment.principal {
  background-color: var(--color-primary);
}

.calc-breakdown-bar .breakdown-segment.interest {
  background-color: var(--color-accent);
}

.calc-breakdown-legend {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.calc-breakdown-legend .legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.calc-breakdown-legend .legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  flex-shrink: 0;
}

.calc-breakdown-legend .legend-swatch.principal {
  background-color: var(--color-primary);
}

.calc-breakdown-legend .legend-swatch.interest {
  background-color: var(--color-accent);
}

.calc-breakdown-legend .legend-label {
  color: var(--color-text-muted);
  font-weight: 500;
}

.calc-breakdown-legend .legend-val {
  color: var(--color-primary);
  font-weight: 600;
}

/* Summary Grid */
.calc-summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.summary-tile {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
}

.summary-tile-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: 2px;
  font-weight: 500;
}

.summary-tile-value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
}

/* Toggle Schedule Button */
.calc-action-row {
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* --------------------------------------------------------------------------
   Amortization / Schedule Table
   -------------------------------------------------------------------------- */
.calc-schedule-card {
  margin-top: var(--space-8);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-xs);
}

.schedule-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.finance-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  text-align: right;
}

.finance-table th {
  background-color: var(--color-surface-sunken);
  color: var(--color-primary);
  font-weight: 600;
  padding: 10px 12px;
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}

.finance-table th:first-child,
.finance-table td:first-child {
  text-align: left;
}

.finance-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-body);
  white-space: nowrap;
}

.finance-table tr:hover td {
  background-color: var(--color-surface-hover);
}

/* --------------------------------------------------------------------------
   Educational Sections Below Calculator
   Formula, Example, FAQs, Related Guides
   -------------------------------------------------------------------------- */
.calc-editorial-sections {
  margin-top: var(--space-12);
  display: flex;
  flex-direction: column;
  gap: var(--space-10);
}

.calc-explanation-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-xs);
}

.calc-explanation-card-em {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-xs);
}

/* Factors that affect the result */
.factor-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.factor-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: var(--space-4);
  border-left: 3px solid var(--color-border);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-text-body);
}

.factor-item strong {
  color: var(--color-primary);
  font-size: var(--text-base);
}

/* Related calculators grid */
.related-calcs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.related-calc-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-surface-sunken);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-body);
  text-decoration: none;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.related-calc-link:hover {
  border-color: var(--color-accent);
  color: var(--color-primary);
}

.related-calc-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.related-calc-name {
  font-size: var(--text-sm);
  font-weight: 600;
}

.formula-display-box {
  background-color: var(--color-surface-sunken);
  border-left: 3px solid var(--color-accent);
  padding: var(--space-4) var(--space-6);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--color-primary);
  margin: var(--space-4) 0;
  overflow-x: auto;
}

.formula-variable-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-4);
  font-size: var(--text-sm);
}

.formula-variable-list li {
  background-color: #f8fafc;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

/* Step-by-step example */
.example-steps-list {
  list-style: none;
  counter-reset: example-counter;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.example-step-item {
  counter-increment: example-counter;
  position: relative;
  padding-left: 36px;
}

.example-step-item::before {
  content: counter(example-counter);
  position: absolute;
  left: 0;
  top: 2px;
  width: 24px;
  height: 24px;
  background-color: var(--color-surface-sunken);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary);
}

/* FAQ Accordion */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.faq-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-border-hover);
}

.faq-question-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-primary);
  text-align: left;
}

.faq-chevron {
  transition: transform var(--transition-fast);
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.faq-item.open .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease-out;
  padding: 0 var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text-body);
  line-height: 1.65;
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding-bottom: var(--space-5);
}

/* Related Guides Callout */
.related-guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-4);
}