/* � 2026 TaxBackwards.ca. All rights reserved. */

/* =============================================================================
   1. Design tokens � dark mode default (:root)
   ============================================================================= */

:root {
  /* Page colours */
  --page-bg:        #162640;
  --card-bg:        #1e3352;
  --accent:         #3b82f6;
  --accent-hover:   #2563eb;
  --success:        #10b981;
  --border:         #2e4a6a;

  /* Text colours */
  --text-primary:   #f1f5f9;
  --text-secondary: #8eaabf;
  --text-muted:     #5d7d96;

  /* Semantic colours � same across both themes */
  --error:          #ef4444;
  --on-accent:      #ffffff;

  /* Tooltip � fixed design token, does not theme-switch */
  --tooltip-bg:            #1e293b;
  --tooltip-text:          #ffffff;

  /* Scrollbar � fixed design token */
  --scrollbar-thumb:       #334155;
  --scrollbar-thumb-hover: #475569;

  /* Transitions */
  --transition-theme: 0.3s ease;
  --transition-fast:  0.15s ease;
}

/* =============================================================================
   2. Light mode overrides
   ============================================================================= */

[data-theme="light"] {
  --page-bg:        #e8edf5;
  --card-bg:        #ffffff;
  --accent:         #2563eb;
  --accent-hover:   #1d4ed8;
  --success:        #059669;
  --border:         #cbd5e1;
  --text-primary:   #0f172a;
  --text-secondary: #475569;
  --text-muted:     #94a3b8;
}

/* =============================================================================
   3. Reset
   ============================================================================= */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* =============================================================================
   4. Base / body
   ============================================================================= */

html {
  font-size: 14px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.6;
  background-color: var(--page-bg);
  color: var(--text-primary);
  min-height: 100vh;
  transition:
    background-color var(--transition-theme),
    color var(--transition-theme);
}

/* =============================================================================
   5. Scrollbar
   ============================================================================= */

::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--page-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

/* =============================================================================
   6. Layout � centred column, 480px max-width
   ============================================================================= */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 480px;
  margin: 0 auto;
  padding: 28px 16px 12px;
}

main {
  max-width: 480px;
  margin: 0 auto;
  padding: 0 16px 48px;
}

.site-footer {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px 16px 40px;
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.6;
}

.site-footer p + p {
  margin-top: 4px;
}

.site-footer a {
  color: var(--text-muted);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

.site-footer a:hover {
  color: var(--text-secondary);
}

/* Mobile � full width, reduced padding */
@media (max-width: 479px) {
  .site-header {
    padding-left: 20px;
    padding-right: 20px;
  }

  main {
    padding-left: 0;
    padding-right: 0;
  }

  .site-footer {
    padding-left: 20px;
    padding-right: 20px;
  }
}

/* =============================================================================
   7. Card
   ============================================================================= */

.card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
  transition:
    background-color var(--transition-theme),
    box-shadow var(--transition-theme);
}

[data-theme="light"] .card {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

@media (max-width: 479px) {
  .card {
    border-radius: 0;
    padding: 20px;
  }
}

/* =============================================================================
   8. Logo
   ============================================================================= */

.logo-screen {
  display: block;
  height: 48px;
  width: auto;
  max-width: 240px;
}

.logo-print {
  display: none;
}

/* =============================================================================
   9. Theme toggle
   ============================================================================= */

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 16px;
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    color var(--transition-fast),
    background-color var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.theme-toggle:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Show sun in dark mode (click to go light), show moon in light mode */
.theme-icon-dark  { display: inline; }
.theme-icon-light { display: none;   }

[data-theme="light"] .theme-icon-dark  { display: none;   }
[data-theme="light"] .theme-icon-light { display: inline; }

/* =============================================================================
   10. Field groups � 24px minimum vertical gap
   ============================================================================= */

.field-group {
  margin-bottom: 24px;
}

.field-group:last-of-type {
  margin-bottom: 0;
}

/* Row that holds a label and a help icon side-by-side */
.label-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
}

/* Section label: 11px / 500 / uppercase */
.field-label {
  display: block;
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 8px;
  transition: color var(--transition-theme);
}

.label-row .field-label {
  margin-bottom: 0;
}

/* =============================================================================
   11. Province select � custom arrow, no browser default styling
   ============================================================================= */

.select-wrapper {
  position: relative;
}

/* Custom dropdown arrow */
.select-wrapper::after {
  content: '';
  position: absolute;
  right: 16px;
  top: 50%;
  margin-top: -3px;
  transform: translateY(-50%);
  pointer-events: none;
  border: 5px solid transparent;
  border-top-color: var(--text-secondary);
  border-bottom: none;
}

select {
  appearance: none;
  -webkit-appearance: none;
  display: block;
  width: 100%;
  padding: 14px 44px 14px 16px;
  font-family: inherit;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  background-color: var(--page-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-theme),
    color var(--transition-theme);
}

select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Coming Soon options */
select option:disabled {
  color: var(--text-muted);
  font-style: italic;
}

/* =============================================================================
   12. Price input
   ============================================================================= */

#price-input {
  display: block;
  width: 100%;
  padding: 14px 16px;
  font-family: inherit;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  background-color: var(--page-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-theme),
    color var(--transition-theme);
}

#price-input::placeholder {
  color: var(--text-muted);
  font-weight: 400;
}

#price-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

#price-input.input-error {
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.error-message {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  font-weight: 400;
  color: var(--error);
  min-height: 16px;
  line-height: 1.4;
}

/* =============================================================================
   13. Auditor Mode toggle � custom CSS switch, no native checkbox
   ============================================================================= */

.auditor-group {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.auditor-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: default;
  flex: 1;
  line-height: 1.4;
  transition: color var(--transition-theme);
}

.toggle-switch {
  display: inline-flex;
  align-items: center;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  flex-shrink: 0;
}

.toggle-switch:focus-visible {
  outline: none;
  border-radius: 12px;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.toggle-track {
  display: flex;
  align-items: center;
  width: 44px;
  height: 24px;
  background: var(--border);
  border-radius: 12px;
  padding: 2px;
  transition: background 0.2s ease;
}

.toggle-switch[aria-checked="true"] .toggle-track {
  background: var(--accent);
}

.toggle-thumb {
  width: 20px;
  height: 20px;
  background: var(--card-bg);
  border-radius: 50%;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.toggle-switch[aria-checked="true"] .toggle-thumb {
  transform: translateX(20px);
}

/* =============================================================================
   14. Calculate button � full width, 48px, translateY hover
   ============================================================================= */

/* =============================================================================
   14b. Auditor warning � hidden by default, shown via app.js
   ============================================================================= */

.auditor-warning {
  display: none;
  font-size: 11px;
  color: #f59e0b;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid #f59e0b;
  border-radius: 8px;
  padding: 8px 12px;
  margin-top: 8px;
  line-height: 1.5;
}

.btn-calculate {
  display: block;
  width: 100%;
  height: 48px;
  padding: 0 16px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  color: var(--on-accent);
  background: var(--accent);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-calculate:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.btn-calculate:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-calculate:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
}

/* =============================================================================
   15. Disclaimer � 11px, directly below calculate button
   ============================================================================= */

.disclaimer {
  margin-top: 10px;
  font-size: 11px;
  font-weight: 400;
  color: var(--text-muted);
  line-height: 1.5;
  transition: color var(--transition-theme);
}

/* =============================================================================
   16. Results divider � CSS border-top, never <hr>
   ============================================================================= */

.results-divider {
  border-top: 1px solid var(--border);
  margin: 24px 0;
  transition: border-color var(--transition-theme);
}

/* =============================================================================
   17. Result rows
   ============================================================================= */

.result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
}

.result-row + .result-row {
  border-top: 1px solid var(--border);
}

.result-label-group {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  min-width: 0;
}

/* Section label: 11px / 500 / uppercase */
.result-label-text {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  transition: color var(--transition-theme);
}

.result-value-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* Pre-tax value: 32px / 700 */
.result-pretax {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.1;
  transition: color var(--transition-theme);
}

/* Tax values: 24px / 700 */
.result-tax {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  line-height: 1.2;
  transition: color var(--transition-theme);
}

/* Total row */
.result-total-row {
  justify-content: space-between;
}

.result-total {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition-theme);
}

/* Mobile: scale down the large pretax figure */
@media (max-width: 479px) {
  .result-pretax { font-size: 24px; }
  .result-tax    { font-size: 20px; }
}

/* =============================================================================
   18. Copy buttons � pill shape, ghost at rest, filled flash on copy
   ============================================================================= */

.btn-copy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 28px;
  padding: 0 12px;
  font-family: inherit;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 20px;
  cursor: pointer;
  flex-shrink: 0;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.btn-copy:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-copy:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* 1.2s filled flash on successful copy */
.btn-copy.copied {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}

/* =============================================================================
   19. Verified badge � pill, green
   ============================================================================= */

.verified-badge {
  display: flex;
  justify-content: flex-start;
  padding: 12px 0 4px;
}

.verified-badge-text {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid var(--success);
  color: var(--success);
  border-radius: 20px;
  font-size: 11px;
  font-weight: 500;
  transition: color var(--transition-theme), border-color var(--transition-theme);
}

/* =============================================================================
   20. Clear button
   ============================================================================= */

.btn-clear {
  display: block;
  width: 100%;
  height: 44px;
  margin-top: 16px;
  padding: 0 16px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-clear:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

.btn-clear:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* =============================================================================
   21. Help icon � tooltip trigger
   ============================================================================= */

.help-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  min-width: 16px;
  padding: 0;
  background: var(--border);
  color: var(--text-muted);
  border: none;
  border-radius: 50%;
  font-family: inherit;
  font-size: 10px;
  font-weight: 700;
  line-height: 1;
  cursor: help;
  flex-shrink: 0;
  position: relative;
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
}

.help-icon:hover,
.help-icon:focus-visible {
  background: var(--accent);
  color: var(--on-accent);
}

.help-icon:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* =============================================================================
   22. Tooltips � CSS only, data-tooltip attribute + ::before/::after
       Appear above trigger, arrow points down toward trigger.
   ============================================================================= */

[data-tooltip] {
  position: relative;
}

/* Tooltip bubble */
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  width: 220px;
  padding: 8px 10px;
  background: var(--tooltip-bg);
  color: var(--tooltip-text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 12px;
  font-weight: 400;
  font-style: normal;
  line-height: 1.5;
  text-transform: none;
  letter-spacing: normal;
  text-align: left;
  border-radius: 6px;
  pointer-events: none;
  white-space: normal;
  opacity: 0;
  z-index: 100;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  transition: opacity 0.15s ease;
}

/* Downward-pointing arrow */
[data-tooltip]::before {
  content: '';
  position: absolute;
  bottom: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--tooltip-bg);
  border-bottom: none;
  pointer-events: none;
  opacity: 0;
  z-index: 101;
  transition: opacity 0.15s ease;
}

[data-tooltip]:hover::after,
[data-tooltip]:hover::before,
[data-tooltip]:focus-visible::after,
[data-tooltip]:focus-visible::before {
  opacity: 1;
}

/* =============================================================================
   23. Screen-reader-only utility
   ============================================================================= */

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

/* =============================================================================
   24. Print-only ledger header � hidden on screen
   ============================================================================= */

.print-only-ledger-header {
  display: none;
}

/* =============================================================================
   25. Print styles � all in this file (CSP: no separate stylesheet)
   ============================================================================= */

@media print {
  @page {
    size: letter portrait;
    margin: 0.6in 0.8in;
  }

  /* Force white background, black text regardless of active theme */
  *,
  *::before,
  *::after {
    background: white !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  }

  /* Hide elements that must not appear in print */
  .site-header,
  .site-footer,
  aside,
  .theme-toggle,
  .btn-calculate,
  .btn-copy,
  .btn-clear,
  #auditor-toggle,
  .auditor-group,
  .help-icon,
  .field-group,
  .disclaimer,
  .cookie-banner {
    display: none !important;
  }

  /* Results always visible in print */
  #results-section {
    display: block !important;
  }

  /* Swap logo */
  .logo-screen { display: none   !important; }
  .logo-print  { display: block  !important; }

  /* Show print-only ledger header */
  .print-only-ledger-header {
    display: block;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 14px;
    font-weight: 600;
    padding-bottom: 12px;
    border-bottom: 1px solid black;
    margin-bottom: 16px;
  }

  /* Flatten card styling */
  .card {
    padding: 0;
    border-radius: 0;
  }
}