/* ===== Calculator Tab Styles ===== */

.calculator {
  max-width: var(--article-w);
  margin: 0 auto;
  padding: 40px 0 80px;
}

.article.calculator-active.loaded {
  animation: fadeUp 0.3s var(--ease);
}

.calc-title {
  font: 700 1.85rem/1.2 var(--font);
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.calc-subtitle {
  font-size: 0.94rem;
  line-height: 1.65;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.calc-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 36px;
}

.calc-stat {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  padding: 16px 14px;
  text-align: center;
}

.calc-stat-value {
  font: 600 1.35rem/1 var(--font);
  color: var(--text-primary);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.calc-stat-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 7px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.calc-section-title {
  font: 600 1.15rem/1.3 var(--font);
  color: var(--text-primary);
  margin: 36px 0 8px;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.calc-section-desc {
  font-size: 0.83rem;
  line-height: 1.58;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.calc-figure {
  margin: 0 0 20px;
}

.calc-chart-container {
  position: relative;
  height: 380px;
  margin: 0 -20px 12px;
  padding: 0 8px;
}

.calc-cost-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(280px, 0.95fr);
  gap: 20px;
  align-items: start;
}

.calc-cost-primary,
.calc-cost-secondary {
  min-width: 0;
}

.calc-cost-primary {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.calc-cost-secondary {
  padding: 18px 18px 16px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(250, 250, 250, 0.94) 100%);
  border: 1px solid var(--border-light);
  border-radius: 16px;
  box-shadow: 0 14px 34px rgba(17, 17, 17, 0.04);
}

.calc-figure-annual,
.calc-figure-frontier {
  margin-bottom: 0;
}

.calc-chart-container--annual {
  height: 360px;
  margin: 0 -16px 14px;
  padding: 0 4px;
}

.calc-chart-container--frontier {
  height: 250px;
  margin: 0 -10px 14px;
  padding: 0 2px;
}

.calc-panel-title {
  font: 600 0.96rem/1.3 var(--font);
  color: var(--text-primary);
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.calc-section-desc-secondary {
  font-size: 0.79rem;
  line-height: 1.55;
  margin-bottom: 14px;
}

.calc-chart-caption,
.calc-chart-summary,
.calc-chart-empty {
  font-size: 0.78rem;
  line-height: 1.55;
}

.calc-chart-caption {
  color: var(--text-muted);
}

.calc-chart-summary {
  color: var(--text-secondary);
  margin-top: 8px;
}

.calc-chart-empty {
  margin-top: 10px;
  padding: 10px 12px;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: 10px;
}

.calc-cost-summary-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.calc-cost-summary-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 11px 12px;
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: 12px;
}

.calc-cost-summary-swatch {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--summary-color);
  flex-shrink: 0;
  margin-top: 4px;
  box-shadow: 0 0 0 4px rgba(17, 17, 17, 0.04);
}

.calc-cost-summary-copy {
  min-width: 0;
}

.calc-cost-summary-label {
  font: 500 0.75rem/1.45 var(--font);
  color: var(--text-primary);
}

.calc-cost-summary-value {
  margin-top: 2px;
  font: 400 0.73rem/1.45 var(--font);
  color: var(--text-muted);
}

.calc-frontier-milestones {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.calc-frontier-milestone {
  padding: 12px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid var(--border-light);
  border-radius: 12px;
}

.calc-frontier-milestone-label {
  font: 500 0.69rem/1.3 var(--font);
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.calc-frontier-milestone-value {
  margin-top: 7px;
  font: 600 0.95rem/1.2 var(--font);
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.calc-frontier-milestone-detail {
  margin-top: 5px;
  font: 400 0.73rem/1.45 var(--font);
  color: var(--text-secondary);
}

.calc-slider-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 28px;
  margin: 0 0 12px;
}

.calc-slider-group,
.calc-cost-slider {
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: 12px;
}

.calc-slider-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
}

.calc-slider-label {
  font: 500 0.82rem/1.2 var(--font);
  color: var(--text-primary);
}

.calc-slider-value {
  font: 500 0.78rem/1 var(--font);
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.calc-slider-note {
  margin-top: 10px;
  font-size: 0.74rem;
  line-height: 1.5;
  color: var(--text-muted);
}

.calc-range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(
    to right,
    var(--text-primary) 0%,
    var(--text-primary) var(--fill, 50%),
    var(--border) var(--fill, 50%),
    var(--border) 100%
  );
  transition: background 0.1s ease;
}

.calc-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--text-primary);
  cursor: pointer;
  transition: transform 0.15s var(--ease), box-shadow 0.15s var(--ease);
}

.calc-range::-webkit-slider-thumb:hover {
  transform: scale(1.12);
  box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.06);
}

.calc-range::-webkit-slider-thumb:active {
  transform: scale(1.04);
  box-shadow: 0 0 0 6px rgba(0, 0, 0, 0.08);
}

.calc-range::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--text-primary);
  cursor: pointer;
  transition: transform 0.15s var(--ease), box-shadow 0.15s var(--ease);
}

.calc-range::-moz-range-track {
  height: 4px;
  border-radius: 999px;
  background: var(--border);
}

.calc-range::-moz-range-progress {
  height: 4px;
  border-radius: 999px;
  background: var(--text-primary);
}

.calc-range:focus-visible {
  outline: 2px solid rgba(17, 17, 17, 0.45);
  outline-offset: 6px;
}

.calc-ref-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  padding: 14px;
  margin-bottom: 0;
  background: linear-gradient(180deg, rgba(250, 250, 250, 0.98) 0%, rgba(247, 247, 247, 0.96) 100%);
  border: 1px solid var(--border-light);
  border-radius: 16px;
}

.calc-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.calc-ref-label {
  display: inline-flex;
  align-items: stretch;
  cursor: pointer;
}

.calc-ref-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 8px 12px;
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: 999px;
  transition: background-color 0.15s var(--ease), border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}

.calc-ref-label:hover .calc-ref-chip {
  background: var(--hover);
  border-color: var(--border);
}

.calc-ref-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ref-color);
  opacity: 0.35;
  transition: opacity 0.15s var(--ease), transform 0.15s var(--ease);
}

.calc-ref-text {
  font: 400 0.78rem/1.35 var(--font);
  color: var(--text-secondary);
}

.calc-ref-check:checked + .calc-ref-chip {
  border-color: var(--ref-color);
  background: var(--hover);
}

.calc-ref-check:checked + .calc-ref-chip .calc-ref-dot {
  opacity: 1;
  transform: scale(1.05);
}

.calc-ref-check:checked + .calc-ref-chip .calc-ref-text {
  color: var(--text-primary);
}

.calc-ref-label:focus-within .calc-ref-chip {
  outline: 2px solid rgba(17, 17, 17, 0.45);
  outline-offset: 2px;
}

.calc-bottom-controls {
  display: flex;
  align-items: flex-end;
  gap: 24px;
  margin: 20px 0 0;
}

.calc-cost-slider {
  flex: 1;
}

.calc-buttons {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  flex-shrink: 0;
}

.calc-btn {
  padding: 10px 16px;
  font: 500 0.78rem/1 var(--font);
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text-primary);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s var(--ease), border-color 0.15s var(--ease), color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}

.calc-btn:hover {
  background: var(--hover);
  border-color: var(--text-muted);
}

.calc-btn:focus-visible {
  outline: 2px solid rgba(17, 17, 17, 0.45);
  outline-offset: 2px;
}

.calc-btn-secondary {
  color: var(--text-muted);
}

.calc-methodology {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
}

.calc-methodology h3 {
  font: 600 0.88rem/1.3 var(--font);
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.calc-methodology p {
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.calc-methodology a {
  color: var(--text-secondary);
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-underline-offset: 2px;
}

.calc-methodology a:hover {
  color: var(--text-primary);
  text-decoration-color: var(--text-muted);
}

@media (max-width: 860px) {
  .calculator {
    padding: 24px 0 60px;
  }

  .calc-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .calc-slider-grid {
    grid-template-columns: 1fr;
  }

  .calc-cost-layout {
    grid-template-columns: 1fr;
  }

  .calc-cost-secondary {
    padding: 16px;
  }

  .calc-frontier-milestones {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .calc-bottom-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .calc-buttons {
    justify-content: flex-start;
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .calc-title {
    font-size: 1.45rem;
  }

  .calc-chart-container {
    height: 290px;
    margin: 0 -12px 12px;
  }

  .calc-chart-container--annual {
    height: 310px;
    margin: 0 -10px 12px;
  }

  .calc-chart-container--frontier {
    height: 220px;
    margin: 0 -8px 12px;
  }

  .calc-stats {
    gap: 8px;
  }

  .calc-stat {
    padding: 12px 10px;
  }

  .calc-stat-value {
    font-size: 1.1rem;
  }

  .calc-ref-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .calc-ref-label,
  .calc-ref-chip {
    width: 100%;
  }

  .calc-ref-controls {
    padding: 12px;
  }

  .calc-cost-summary-row,
  .calc-frontier-milestones {
    grid-template-columns: 1fr;
  }

  .calc-cost-summary-item,
  .calc-frontier-milestone {
    padding: 11px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .article.calculator-active.loaded {
    animation: none;
  }

  .calc-range,
  .calc-range::-webkit-slider-thumb,
  .calc-range::-moz-range-thumb,
  .calc-ref-chip,
  .calc-ref-dot,
  .calc-btn {
    transition: none;
  }
}