/* ==========================================================================
   CALCULATOR — Roofing Cost Estimator
   ========================================================================== */

/* --- Layout: two-column on desktop, stacked on mobile --- */
.calc-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--space-8);
  align-items: start;
  max-width: 960px;
  margin: var(--space-8) auto 0;
}

/* --- Form Panel (left column) --- */
.calc-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* --- Individual Step --- */
.calc-step {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: var(--space-5) var(--space-6);
}

.calc-step__label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: var(--space-4);
}

.calc-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-gold);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: var(--font-weight-semibold);
  font-size: var(--text-sm);
  flex-shrink: 0;
}

.calc-step__title {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-semibold);
  font-size: var(--text-lg);
  color: var(--color-text-primary);
}

/* --- Square Footage Display --- */
.sqft-display {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: var(--space-3);
}

.sqft-number {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-extrabold);
  font-size: var(--text-3xl);
  color: var(--color-charcoal);
}

.sqft-unit {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* --- Range Slider --- */
.sqft-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(
    to right,
    var(--color-gold) 0%,
    var(--color-gold) var(--slider-progress, 22%),
    var(--color-border) var(--slider-progress, 22%),
    var(--color-border) 100%
  );
  outline: none;
  cursor: pointer;
  margin: var(--space-2) 0;
}

.sqft-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-gold);
  border: 3px solid var(--color-white);
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
  cursor: pointer;
  transition: transform 0.15s ease;
}

.sqft-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.sqft-slider::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-gold);
  border: 3px solid var(--color-white);
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
  cursor: pointer;
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

/* --- Pitch Grid --- */
.pitch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.pitch-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 1rem 0.5rem;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
  text-align: center;
}

.pitch-btn:hover {
  border-color: var(--color-gold);
  background: var(--color-surface);
}

.pitch-btn.selected {
  border-color: var(--color-gold);
  background: var(--color-surface);
  box-shadow: 0 0 0 1px var(--color-gold);
}

.pitch-btn__icon {
  width: 48px;
  height: 40px;
  flex-shrink: 0;
}

.pitch-btn__label {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-semibold);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  line-height: 1.2;
}

.pitch-btn__sub {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.3;
}

/* --- Material Grid --- */
.material-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.material-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 1.25rem 0.75rem;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
  text-align: center;
  position: relative;
}

.material-card input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.material-card__check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  transition: border-color 0.2s ease, background 0.2s ease;
  flex-shrink: 0;
}

.material-card:hover {
  border-color: var(--color-gold);
}

.material-card.selected {
  border-color: var(--color-gold);
  background: var(--color-surface);
  box-shadow: 0 0 0 1px var(--color-gold);
}

.material-card.selected .material-card__check {
  border-color: var(--color-gold);
  background: var(--color-gold);
  box-shadow: inset 0 0 0 3px var(--color-surface);
}

.material-card__name {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-semibold);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
}

.material-card__sub {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* --- Results Panel (right column) --- */
.calc-results {
  position: sticky;
  top: 100px;
}

.calc-results-card {
  background: var(--color-charcoal);
  border-radius: 14px;
  overflow: hidden;
  color: var(--color-white);
}

.calc-results-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.calc-results-header h3 {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-extrabold);
  font-size: var(--text-2xl);
  color: var(--color-white);
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.calc-results-body {
  padding: var(--space-5);
}

/* --- Price Display --- */
.price-range {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.price-label {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
}

.price-value {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-extrabold);
  font-size: var(--text-3xl);
  color: var(--color-gold);
}

/* --- Summary Table --- */
.calc-summary {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 2rem;
}

.calc-summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.calc-summary-row:last-child {
  border-bottom: none;
}

.calc-summary-row__label {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
}

.calc-summary-row__val {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-semibold);
  font-size: var(--text-sm);
  color: var(--color-white);
}

/* --- Disclaimer --- */
.calc-disclaimer {
  color: rgba(255,255,255,0.45);
  line-height: 1.5;
  margin-top: 2rem;
  font-size: 0.875rem;
}

.calc-disclaimer strong {
  color: rgba(255,255,255,0.7);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .calc-layout {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .calc-results {
    position: static;
  }

  .pitch-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pitch-grid .pitch-btn:last-child {
    grid-column: 1 / -1;
    max-width: 50%;
    justify-self: center;
  }
}

@media (max-width: 480px) {
  .material-grid {
    grid-template-columns: 1fr;
  }

  .pitch-grid {
    grid-template-columns: 1fr 1fr;
  }

  .calc-step {
    padding: var(--space-4);
  }
}