/* ==============================================
   Base Styles for CareAbout Calculators
   Design Philosophy: Empathy, Clarity, Accessibility
   ============================================== */

/* Design Tokens - Consistent values across all calculators */
:root {
  /* Colors - Carefully chosen for accessibility and emotion */
  --color-primary: #4CAF50;          /* Hope, growth, positive action */
  --color-secondary: #2196F3;        /* Trust, stability, information */
  --color-success: #4CAF50;
  --color-warning: #FF9800;          /* Gentle alerts, not alarming */
  --color-error: #F44336;
  --color-text: #333333;             /* High contrast for readability */
  --color-text-light: #666666;
  --color-bg: #FFFFFF;
  --color-bg-light: #F8F9FA;         /* Soft, calming background */
  --color-bg-card: #FAFBFC;
  
  /* Typography - Optimized for all ages */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-base: 16px;            /* Never smaller for body text */
  --font-size-large: 20px;
  --font-size-xlarge: 24px;
  --font-size-small: 14px;           /* Only for less critical info */
  --line-height: 1.6;                /* Easier reading */
  
  /* Spacing - Generous whitespace reduces cognitive load */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  
  /* Borders & Shadows - Soft, approachable */
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --border-color: #E0E0E0;
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  
  /* Transitions - Smooth, not jarring */
  --transition-base: all 0.3s ease;
  --transition-fast: all 0.15s ease;
}

/* Reset & Base Styles */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Container - Mobile-first responsive design */
.calculator-container {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--spacing-lg);
  animation: fadeIn 0.5s ease;
}

@media (max-width: var(--breakpoint-md)) {
  .calculator-container {
    padding: var(--spacing-md);
  }
}

/* Typography Hierarchy */
h1 {
  font-size: clamp(28px, 5vw, 36px);
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 var(--spacing-md) 0;
  color: var(--color-text);
}

h2 {
  font-size: clamp(24px, 4vw, 28px);
  font-weight: 600;
  line-height: 1.4;
  margin: var(--spacing-xl) 0 var(--spacing-lg) 0;
  color: var(--color-text);
}

h3 {
  font-size: clamp(20px, 3.5vw, 24px);
  font-weight: 600;
  line-height: 1.4;
  margin: var(--spacing-lg) 0 var(--spacing-md) 0;
  color: var(--color-text);
}

p {
  margin: 0 0 var(--spacing-md) 0;
  color: var(--color-text-light);
}

/* Lead paragraph - for important context */
.lead {
  font-size: var(--font-size-large);
  line-height: 1.6;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xl);
}

/* Form Styling - Accessible and touch-friendly */
.calculator-form {
  background: var(--color-bg-card);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-xl);
}

@media (max-width: var(--breakpoint-md)) {
  .calculator-form {
    padding: var(--spacing-lg);
  }
}

.form-section {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
}

.form-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
  font-size: var(--font-size-base);
}

/* Input & Select - Large touch targets */
input[type="text"],
input[type="number"],
input[type="email"],
select,
textarea {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  transition: var(--transition-base);
  background-color: var(--color-bg);
  -webkit-appearance: none;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-interactive-focus);
  box-shadow: 0 0 0 var(--focus-ring-width) rgba(74, 144, 184, 0.25);
}

/* Number inputs - remove spinners on mobile */
input[type="number"] {
  -moz-appearance: textfield;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Select styling */
select {
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 20px;
  padding-right: 40px;
}

/* Checkbox & Radio - Larger touch targets */
.checkbox-group,
.radio-group {
  margin: var(--spacing-md) 0;
}

.checkbox-label,
.radio-label {
  display: flex;
  align-items: flex-start;
  margin-bottom: var(--spacing-md);
  cursor: pointer;
  font-weight: normal;
}

.checkbox-label input[type="checkbox"],
.radio-label input[type="radio"] {
  width: 20px;
  height: 20px;
  margin-right: var(--spacing-md);
  margin-top: 2px;
  flex-shrink: 0;
  cursor: pointer;
}

/* Buttons - Clear hierarchy */
.btn {
  display: inline-block;
  padding: 14px 28px;
  border: none;
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-base);
  text-align: center;
  line-height: 1.4;
  font-family: var(--font-family);
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background-color: #45a049;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: white;
}

.btn-secondary:hover {
  background-color: #1976D2;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-large {
  padding: 18px 36px;
  font-size: var(--font-size-large);
  width: 100%;
}

/* Calculate button - Most important action */
.calculate-btn {
  background-color: var(--color-primary);
  color: white;
  padding: 18px 36px;
  border: none;
  border-radius: var(--border-radius);
  font-size: var(--font-size-large);
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: var(--transition-base);
  margin-top: var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

.calculate-btn:hover {
  background-color: #45a049;
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.calculate-btn:active {
  transform: translateY(0);
}

/* Info tooltips - Help without overwhelming */
.info-tooltip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background-color: var(--color-secondary);
  color: white;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 600;
  cursor: help;
  margin-left: var(--spacing-sm);
  transition: var(--transition-fast);
  position: relative;
}

.info-tooltip:hover {
  background-color: #1976D2;
  transform: scale(1.1);
}

.tooltip-content {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: #333;
  color: white;
  border-radius: var(--border-radius);
  font-size: var(--font-size-small);
  font-weight: normal;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-fast);
  z-index: 1000;
  max-width: 250px;
  white-space: normal;
  text-align: left;
}

.info-tooltip:hover .tooltip-content,
.info-tooltip:focus .tooltip-content {
  opacity: 1;
  visibility: visible;
}

/* Results container - Clear presentation */
.results-container {
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: opacity 0.5s ease, max-height 0.5s ease;
}

.results-container.show {
  opacity: 1;
  max-height: none;
  animation: slideIn 0.5s ease;
}

.results-card {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  margin-bottom: var(--spacing-xl);
}

/* Result items - Clear hierarchy */
.result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--border-color);
}

.result-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.result-label {
  font-weight: 500;
  color: var(--color-text-light);
}

.result-value {
  font-weight: 600;
  color: var(--color-text);
  font-size: var(--font-size-large);
}

.result-total {
  font-size: var(--font-size-xlarge);
  font-weight: 700;
  color: var(--color-primary);
  padding-top: var(--spacing-lg);
  margin-top: var(--spacing-lg);
  border-top: 2px solid var(--border-color);
}

/* CTA Section - Natural next steps */
.cta-section {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
  border-radius: var(--border-radius-lg);
  text-align: center;
}

.cta-section h3 {
  margin-top: 0;
  color: var(--color-text);
}

.cta-section p {
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-large);
}

/* Loading states */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(0, 0, 0, 0.1);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* Accessibility - Focus states */
*:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

/* Animations - Smooth, not distracting */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideIn {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Print styles - Clean results for saving */
@media print {
  .calculator-form,
  .cta-section,
  .btn {
    display: none;
  }
  
  .calculator-container {
    max-width: 100%;
    padding: 0;
  }
  
  .results-card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-primary: #0D47A1;
    --color-text: #000000;
    --color-text-light: #000000;
    --border-color: #000000;
  }
  
  input, select, textarea {
    border-width: 3px;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1a1a1a;
    --color-bg-light: #2a2a2a;
    --color-bg-card: #2a2a2a;
    --color-text: #ffffff;
    --color-text-light: #cccccc;
    --border-color: #444444;
  }
  
  input, select, textarea {
    background-color: var(--color-bg);
    color: var(--color-text);
  }
}