/* ======================================================================
   REBATE CALCULATOR STYLESHEET
   IMS Heating & Air | Northern Colorado Craft Design System

   Styles the step-by-step rebate calculator wizard with progress tracking,
   option selection, and results display. Integrates with existing design
   system custom properties from style.css.

   ====================================================================== */

/* ======================================================================
   VARIABLE ALIASES
   Maps shorthand names used in this stylesheet to the actual variable
   names defined in style.css (--color-*, --font-family-*).
   Includes hardcoded fallbacks for safety.
   ====================================================================== */

:root {
  --carrier-blue: var(--color-carrier-blue, #1E88E5);
  --midnight: var(--color-primary-navy, #0B1D3A);
  --cta-green: var(--color-success, #43A047);
  --cloud: var(--color-border-light, #D6DCE5);
  --slate: var(--color-text-secondary, #5A6B7D);
  --radius-lg: 16px;
  --radius-md: 12px;
  --font-display: var(--font-family-display, 'Plus Jakarta Sans', sans-serif);
  --font-body: var(--font-family-body, 'DM Sans', sans-serif);
}


/* ======================================================================
   CALCULATOR CONTAINER & LAYOUT
   ====================================================================== */

.calculator {
  max-width: 600px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  box-shadow: 0 2px 8px rgba(11, 29, 58, 0.08);
}

/* Mobile-first: narrower padding */
@media (max-width: 640px) {
  .calculator {
    padding: 1.5rem 1rem;
    border-radius: var(--radius-md);
  }
}


/* ======================================================================
   PROGRESS INDICATOR
   ====================================================================== */

.calculator__step-progress {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
  position: relative;
}

/* Connecting line behind dots */
.calculator__step-progress::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--cloud);
  transform: translateY(-50%);
  z-index: 0;
  pointer-events: none;
}

.progress-dot {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cloud);
  transition: all 0.2s ease;
  z-index: 1;
  cursor: default;
}

.progress-dot.active {
  width: 12px;
  height: 12px;
  background: var(--carrier-blue);
  box-shadow: 0 0 0 3px rgba(0, 75, 135, 0.15);
}

.progress-dot.completed {
  background: var(--cta-green);
  box-shadow: 0 0 0 2px rgba(5, 150, 105, 0.1);
}


/* ======================================================================
   STEP CARDS
   ====================================================================== */

.calculator__step {
  display: block;
  padding: 1.5rem;
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-left: 4px solid var(--carrier-blue);
  border-radius: var(--radius-md);
  animation: slideIn 0.3s ease;
}

.calculator__step.hidden {
  display: none;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.calculator__step-number {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--carrier-blue);
  margin-bottom: 0.5rem;
}

.calculator__question {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--midnight);
  margin-bottom: 1.5rem;
}

@media (max-width: 640px) {
  .calculator__question {
    font-size: 1.125rem;
  }
}


/* ======================================================================
   OPTION BUTTONS
   ====================================================================== */

.calculator__options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 640px) {
  .calculator__options {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
}

.calculator__option {
  padding: 1rem;
  background: #FFFFFF;
  border: 2px solid #E2E8F0;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--slate);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
}

.calculator__option:hover {
  border-color: var(--carrier-blue);
  box-shadow: 0 4px 12px rgba(0, 75, 135, 0.12);
  transform: translateY(-2px);
}

.calculator__option.selected {
  background: var(--carrier-blue);
  color: #FFFFFF;
  border-color: var(--carrier-blue);
  box-shadow: 0 4px 16px rgba(0, 75, 135, 0.2);
  font-weight: 600;
}

.calculator__option.selected:hover {
  box-shadow: 0 6px 20px rgba(0, 75, 135, 0.25);
}

/* Active state for keyboard focus */
.calculator__option:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(0, 75, 135, 0.15);
}


/* ======================================================================
   NAVIGATION BUTTON
   ====================================================================== */

.calculator__next-button {
  width: 100%;
  padding: 0.875rem 1.5rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: #FFFFFF;
  background: linear-gradient(135deg, var(--cta-green) 0%, #059669 100%);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(5, 150, 105, 0.2);
}

.calculator__next-button:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(5, 150, 105, 0.3);
}

.calculator__next-button:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(5, 150, 105, 0.2);
}

.calculator__next-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

@media (max-width: 640px) {
  .calculator__next-button {
    padding: 0.75rem 1.25rem;
    font-size: 0.875rem;
  }
}


/* ======================================================================
   RESULTS SECTION
   ====================================================================== */

.calculator__results {
  display: none;
  padding: 2rem 1.5rem;
  background: linear-gradient(135deg, rgba(0, 75, 135, 0.05) 0%, rgba(5, 150, 105, 0.05) 100%);
  border-radius: var(--radius-md);
  animation: fadeIn 0.4s ease;
}

.calculator__results.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.calculator__results-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--midnight);
  margin-bottom: 1.5rem;
  text-align: center;
}

@media (max-width: 640px) {
  .calculator__results-title {
    font-size: 1.25rem;
  }
}


/* ======================================================================
   RESULTS TABLE
   ====================================================================== */

.calculator__table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-body);
}

.calculator__table thead {
  background: var(--midnight);
  color: #FFFFFF;
}

.calculator__table thead th {
  padding: 0.875rem;
  text-align: left;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.calculator__table tbody tr {
  border-bottom: 1px solid #E2E8F0;
  transition: background-color 0.2s ease;
}

.calculator__table tbody tr:hover {
  background-color: #F8FAFC;
}

.calculator__table tbody td {
  padding: 1rem 0.875rem;
  font-size: 0.95rem;
  color: var(--slate);
}

.calculator__table .amount {
  text-align: right;
  font-weight: 600;
  color: var(--carrier-blue);
}

.calculator__table tr.total {
  background: linear-gradient(90deg, var(--carrier-blue) 0%, #0066B3 100%);
  color: #FFFFFF;
  font-weight: 700;
}

.calculator__table tr.total td {
  padding: 1.25rem 0.875rem;
  color: #FFFFFF;
}

.calculator__table tr.total .amount {
  color: #FFFFFF;
  font-size: 1.25rem;
}


/* ======================================================================
   CALLOUT BOXES
   ====================================================================== */

.urgency-note {
  padding: 1rem;
  background: #FEF3C7;
  border-left: 4px solid #FBBF24;
  border-radius: var(--radius-md);
  margin-top: 1.5rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: #78350F;
  line-height: 1.5;
}

.urgency-note strong {
  font-weight: 700;
}

.hear-callout {
  padding: 1.25rem;
  background: rgba(5, 150, 105, 0.08);
  border: 1px solid rgba(5, 150, 105, 0.2);
  border-left: 4px solid var(--cta-green);
  border-radius: var(--radius-md);
  margin-top: 1.5rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--slate);
  line-height: 1.6;
}

.hear-callout strong {
  color: var(--midnight);
  font-weight: 700;
}

.hear-callout em {
  font-style: italic;
  color: var(--carrier-blue);
}


/* ======================================================================
   ACCESSIBILITY & FOCUS STATES
   ====================================================================== */

/* Ensure high contrast for readability */
@media (prefers-reduced-motion: reduce) {
  .calculator__step,
  .progress-dot,
  .calculator__option,
  .calculator__next-button,
  .calculator__results {
    animation: none;
    transition: none;
  }
}

/* Dark mode DISABLED for PPC landing pages.
   Conversion pages require consistent appearance regardless of OS theme. */


/* ======================================================================
   UTILITY CLASSES
   ====================================================================== */

.calculator__step-hidden {
  display: none;
}

.calculator__results-hidden {
  display: none;
}

/* Optional: Loading state for async operations */
.calculator__option.loading {
  opacity: 0.6;
  cursor: wait;
}

/* Optional: Error state for validation */
.calculator__option.error {
  border-color: #EF4444;
  background-color: #FEE2E2;
}