/**********************************************
 * Parent-Child Age Calculator - CSS
 * Neobrutalism Design System
 * 2-Column Layout (20% Input | 80% Output)
 **********************************************/

/* Global box-sizing */
.parent-child-age-calculator-container,
.parent-child-age-calculator-container *,
.parent-child-age-calculator-container *::before,
.parent-child-age-calculator-container *::after {
  box-sizing: border-box;
}

/* CSS Variables - Light Mode (Default) */
.parent-child-age-calculator-container {
  /* Background colors */
  --bg-primary: #f5f5f0;
  --bg-secondary: #fff;
  --bg-section: #fff;
  
  /* Borders */
  --border-color: #333;
  
  /* Text colors */
  --text-primary: #222;
  --text-secondary: #555;
  --text-light: #666;
  
  /* Brand colors */
  --color-accent: #3498db;
  --color-success: #27ae60;
  --color-warning: #f39c12;
  --color-danger: #e74c3c;
  --color-purple: #9b59b6;
  --color-teal: #1abc9c;
  --color-orange: #fd7e14;
  
  /* Shadows (neobrutalism) */
  --shadow-sm: 2px 2px 0 rgba(0,0,0,0.1);
  --shadow-md: 4px 4px 0 rgba(0,0,0,0.15);
  --shadow-lg: 8px 8px 0 rgba(0,0,0,0.15);
  
  /* Border radius */
  --radius-container: 8px;
  --radius-section: 6px;
  --radius-button: 4px;
  --radius-input: 4px;
  
  /* Input focus */
  --input-focus-bg: #fffacd;
  
  /* Header title */
  --title-color: #2c3e50;
  --title-shadow: 2px 2px 0 rgba(255,255,255,0.5);
  
  /* Button hover background */
  --btn-hover-overlay: rgba(0,0,0,0.1);
  
  /* Copy button background */
  --copy-btn-bg: #fff;
  --copy-btn-hover-bg: #f0f0f0;
  
  /* Date input icon color */
  --date-icon-filter: none;
}

/* Dark Mode - Manual Toggle */
.parent-child-age-calculator-container.dark {
  /* Background colors */
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-section: #2d2d2d;
  
  /* Borders */
  --border-color: #e0e0e0;
  
  /* Text colors */
  --text-primary: #e8e8e8;
  --text-secondary: #b0b0b0;
  --text-light: #909090;
  
  /* Brand colors - adjusted for dark background */
  --color-accent: #5dade2;
  --color-success: #52c77a;
  --color-warning: #f5b041;
  --color-danger: #ec7063;
  --color-purple: #af7ac5;
  --color-teal: #48d1cc;
  --color-orange: #ffb366;
  
  /* Shadows */
  --shadow-sm: 2px 2px 0 rgba(255,255,255,0.08);
  --shadow-md: 4px 4px 0 rgba(255,255,255,0.12);
  --shadow-lg: 8px 8px 0 rgba(255,255,255,0.12);
  
  /* Input focus */
  --input-focus-bg: #3a3a3a;
  
  /* Header title */
  --title-color: #7fb3d5;
  --title-shadow: 2px 2px 0 rgba(0,0,0,0.5);
  
  /* Button hover background */
  --btn-hover-overlay: rgba(255,255,255,0.1);
  
  /* Copy button background */
  --copy-btn-bg: #3a3a3a;
  --copy-btn-hover-bg: #4a4a4a;
  
  /* Date input icon color - invert for dark mode */
  --date-icon-filter: invert(1);
}

/* System Dark Mode Auto Detection */
@media (prefers-color-scheme: dark) {
  .parent-child-age-calculator-container:not(.dark):not(.light) {
    /* Background colors */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-section: #2d2d2d;
    
    /* Borders */
    --border-color: #e0e0e0;
    
    /* Text colors */
    --text-primary: #e8e8e8;
    --text-secondary: #b0b0b0;
    --text-light: #909090;
    
    /* Brand colors */
    --color-accent: #5dade2;
    --color-success: #52c77a;
    --color-warning: #f5b041;
    --color-danger: #ec7063;
    --color-purple: #af7ac5;
    --color-teal: #48d1cc;
    --color-orange: #ffb366;
    
    /* Shadows */
    --shadow-sm: 2px 2px 0 rgba(255,255,255,0.08);
    --shadow-md: 4px 4px 0 rgba(255,255,255,0.12);
    --shadow-lg: 8px 8px 0 rgba(255,255,255,0.12);
    
    /* Input focus */
    --input-focus-bg: #3a3a3a;
    
    /* Header title */
    --title-color: #7fb3d5;
    --title-shadow: 2px 2px 0 rgba(0,0,0,0.5);
    
    /* Button hover background */
    --btn-hover-overlay: rgba(255,255,255,0.1);
    
    /* Copy button background */
    --copy-btn-bg: #3a3a3a;
    --copy-btn-hover-bg: #4a4a4a;
    
    /* Date input icon color - invert for dark mode */
    --date-icon-filter: invert(1);
  }
}

/**********************************************
 * Main Container
 **********************************************/
.parent-child-age-calculator-container {
  position: relative;
  max-width: 1180px;
  width: 100%;
  margin: 8px auto;
  padding: 8px;
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-container);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Malgun Gothic', sans-serif;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  line-height: 1.5;
}

/**********************************************
 * Dark Mode Toggle Button
 **********************************************/
.dark-mode-toggle {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 6px 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.15);
  font-size: 17.5px;
  font-weight: 600;
  color: var(--text-primary);
  z-index: 10;
  border-radius: var(--radius-button);
}

.dark-mode-toggle:hover {
  transform: translate(0.5px, 0.5px);
  box-shadow: 1.5px 1.5px 0 rgba(0,0,0,0.15);
}

.dark-mode-toggle:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

/**********************************************
 * Header
 **********************************************/
.parent-child-age-calculator-container .header {
  text-align: center;
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.parent-child-age-calculator-container .main-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--title-color);
  margin: 0 0 4px 0;
  text-shadow: var(--title-shadow);
}

.parent-child-age-calculator-container .subtitle {
  font-size: 15px;
  color: var(--text-secondary);
  margin: 0;
}

/**********************************************
 * Main Grid Layout (20% Input | 80% Output)
 **********************************************/
.parent-child-age-calculator-container .main-grid {
  display: grid;
  grid-template-columns: minmax(200px, 20%) 1fr;
  gap: 8px;
}

/**********************************************
 * Sections Common Styles
 **********************************************/
.parent-child-age-calculator-container .input-section,
.parent-child-age-calculator-container .result-section,
.parent-child-age-calculator-container .chart-section,
.parent-child-age-calculator-container .table-section {
  background: var(--bg-section);
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
  box-shadow: var(--shadow-md);
}

.parent-child-age-calculator-container .output-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.parent-child-age-calculator-container .section-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-color);
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
}

.parent-child-age-calculator-container .section-header svg {
  width: 18px;
  height: 18px;
  stroke: var(--color-accent);
  flex-shrink: 0;
}

/**********************************************
 * Input Fields
 **********************************************/
.parent-child-age-calculator-container .input-group {
  margin-bottom: 8px;
}

.parent-child-age-calculator-container .input-group label {
  display: block;
  margin-bottom: 4px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
}

.parent-child-age-calculator-container .input-group input[type="date"] {
  width: 100%;
  padding: 7px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-input);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 16px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Malgun Gothic', sans-serif;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
  color-scheme: light;
}

/* Dark mode date input color scheme */
.parent-child-age-calculator-container.dark .input-group input[type="date"] {
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  .parent-child-age-calculator-container:not(.dark):not(.light) .input-group input[type="date"] {
    color-scheme: dark;
  }
}

/* Date input calendar icon styling for webkit browsers */
.parent-child-age-calculator-container .input-group input[type="date"]::-webkit-calendar-picker-indicator {
  filter: var(--date-icon-filter);
  cursor: pointer;
  opacity: 0.8;
}

.parent-child-age-calculator-container .input-group input[type="date"]::-webkit-calendar-picker-indicator:hover {
  opacity: 1;
}

.parent-child-age-calculator-container .input-group input[type="date"]:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--input-focus-bg);
  box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.1);
}

/**********************************************
 * Radio Button Group
 **********************************************/
.parent-child-age-calculator-container .radio-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.parent-child-age-calculator-container .radio-label {
  display: flex;
  align-items: center;
  padding: 6px 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-input);
  cursor: pointer;
  transition: all 0.2s;
  font-size: 15px;
}

.parent-child-age-calculator-container .radio-label:hover {
  background: var(--input-focus-bg);
}

.parent-child-age-calculator-container .radio-label input[type="radio"] {
  margin-right: 6px;
  accent-color: var(--color-accent);
}

.parent-child-age-calculator-container .radio-label input[type="radio"]:checked + .radio-text {
  color: var(--color-accent);
  font-weight: 600;
}

/**********************************************
 * Buttons
 **********************************************/
/* Main Calculate Button */
.parent-child-age-calculator-container .calculate-btn {
  width: 100%;
  padding: 8px 16px;
  margin-top: 8px;
  background: var(--color-accent);
  color: #fff;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-button);
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.2);
}

.parent-child-age-calculator-container .calculate-btn:hover {
  filter: brightness(1.05);
  transform: translate(1px, 1px);
  box-shadow: 3px 3px 0 rgba(0,0,0,0.2);
}

.parent-child-age-calculator-container .calculate-btn:active {
  transform: translate(4px, 4px);
  box-shadow: none;
}

/* Secondary Buttons */
.parent-child-age-calculator-container .button-group {
  display: flex;
  gap: 6px;
  margin-top: 6px;
}

.parent-child-age-calculator-container .sample-btn,
.parent-child-age-calculator-container .reset-btn {
  flex: 1;
  padding: 6px 8px;
  font-size: 15px;
  font-weight: 500;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  cursor: pointer;
  transition: all 0.15s;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.2);
}

.parent-child-age-calculator-container .sample-btn {
  background: var(--color-success);
  color: #fff;
}

.parent-child-age-calculator-container .reset-btn {
  background: var(--color-warning);
  color: #fff;
}

.parent-child-age-calculator-container .sample-btn:hover,
.parent-child-age-calculator-container .reset-btn:hover {
  transform: translate(0.5px, 0.5px);
  box-shadow: 1.5px 1.5px 0 rgba(0,0,0,0.2);
}

.parent-child-age-calculator-container .sample-btn:active,
.parent-child-age-calculator-container .reset-btn:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

/**********************************************
 * Result Content
 **********************************************/
.parent-child-age-calculator-container .result-content {
  min-height: 60px;
}

.parent-child-age-calculator-container .empty-state {
  text-align: center;
  color: var(--text-light);
  font-style: italic;
  padding: 10px;
  margin: 0;
}

/* Age Difference Highlight */
.parent-child-age-calculator-container .age-difference-highlight {
  text-align: center;
  font-size: 28px;
  font-weight: 700;
  color: var(--color-accent);
  padding: 12px;
  margin-bottom: 8px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
}

/* Age Details */
.parent-child-age-calculator-container .age-detail {
  display: flex;
  justify-content: space-between;
  padding: 8px;
  margin-bottom: 4px;
  background: var(--bg-primary);
  border-radius: var(--radius-input);
}

.parent-child-age-calculator-container .age-detail:last-child {
  margin-bottom: 0;
}

.parent-child-age-calculator-container .age-label {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 15px;
}

.parent-child-age-calculator-container .age-value {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 16px;
  font-family: 'Courier New', monospace;
}

/* Current Ages Section */
.parent-child-age-calculator-container .current-ages {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--border-color);
}

.parent-child-age-calculator-container .current-ages h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 0 0 8px 0;
}

/**********************************************
 * Chart Section
 **********************************************/
.parent-child-age-calculator-container .chart-container {
  height: 280px;
  position: relative;
}

/**********************************************
 * Table Section
 **********************************************/
.parent-child-age-calculator-container .table-container {
  overflow-x: auto;
  max-height: 400px;
  overflow-y: auto;
}

.parent-child-age-calculator-container .results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.parent-child-age-calculator-container .results-table th,
.parent-child-age-calculator-container .results-table td {
  padding: 10px 8px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.parent-child-age-calculator-container .results-table th {
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  position: sticky;
  top: 0;
  z-index: 1;
}

.parent-child-age-calculator-container .results-table tr:nth-child(even) {
  background: var(--bg-primary);
}

.parent-child-age-calculator-container .results-table tr:hover {
  background: var(--input-focus-bg);
}

/* Milestone Highlight Row */
.parent-child-age-calculator-container .milestone-highlight {
  background: rgba(253, 126, 20, 0.1) !important;
  font-weight: 500;
}

/* Dark mode milestone highlight */
.parent-child-age-calculator-container.dark .milestone-highlight {
  background: rgba(255, 179, 102, 0.15) !important;
}

@media (prefers-color-scheme: dark) {
  .parent-child-age-calculator-container:not(.dark):not(.light) .milestone-highlight {
    background: rgba(255, 179, 102, 0.15) !important;
  }
}

.parent-child-age-calculator-container .milestone-highlight td:first-child {
  position: relative;
  padding-left: 12px;
}

.parent-child-age-calculator-container .milestone-highlight td:first-child::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--color-orange);
}

/**********************************************
 * Toast Notification
 **********************************************/
.parent-child-age-calculator-container .toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 10px 16px;
  background: var(--text-primary);
  color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  font-size: 16px;
  font-weight: 500;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.3);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
}

.parent-child-age-calculator-container .toast.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(-5px);
}

.parent-child-age-calculator-container .toast.success {
  background: var(--color-success);
  color: #fff;
}

.parent-child-age-calculator-container .toast.error {
  background: var(--color-danger);
  color: #fff;
}

.parent-child-age-calculator-container .toast.info {
  background: var(--color-accent);
  color: #fff;
}

/**********************************************
 * Responsive - Tablet (768px)
 **********************************************/
@media (max-width: 768px) {
  .parent-child-age-calculator-container {
    margin: 6px 5px;
    padding: 7px;
    width: calc(100% - 10px);
  }
  
  .parent-child-age-calculator-container .main-grid {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  
  .parent-child-age-calculator-container .main-title {
    font-size: 24px;
  }
  
  .parent-child-age-calculator-container .section-header {
    font-size: 16px;
  }
  
  .parent-child-age-calculator-container .input-group label {
    font-size: 15.5px;
  }
  
  .parent-child-age-calculator-container .calculate-btn {
    font-size: 17px;
  }
  
  .parent-child-age-calculator-container .chart-container {
    height: 240px;
  }
  
  .parent-child-age-calculator-container .age-difference-highlight {
    font-size: 24px;
  }
}

/**********************************************
 * Responsive - Mobile (480px)
 **********************************************/
@media (max-width: 480px) {
  .parent-child-age-calculator-container {
    margin: 5px 3px;
    padding: 6px;
    border-width: 1px;
  }
  
  .parent-child-age-calculator-container .main-grid {
    gap: 5px;
  }
  
  .parent-child-age-calculator-container .input-section,
  .parent-child-age-calculator-container .result-section,
  .parent-child-age-calculator-container .chart-section,
  .parent-child-age-calculator-container .table-section {
    padding: 6px;
    border-width: 1px;
  }
  
  .parent-child-age-calculator-container .main-title {
    font-size: 22px;
  }
  
  .parent-child-age-calculator-container .subtitle {
    font-size: 14px;
  }
  
  .parent-child-age-calculator-container .section-header {
    font-size: 15.5px;
  }
  
  .parent-child-age-calculator-container .input-group label {
    font-size: 15px;
  }
  
  .parent-child-age-calculator-container .calculate-btn {
    padding: 7px 14px;
    font-size: 16.5px;
  }
  
  .parent-child-age-calculator-container .sample-btn,
  .parent-child-age-calculator-container .reset-btn {
    font-size: 14px;
    padding: 5px 6px;
  }
  
  .parent-child-age-calculator-container .chart-container {
    height: 200px;
  }
  
  .parent-child-age-calculator-container .age-difference-highlight {
    font-size: 22px;
    padding: 10px;
  }
  
  .parent-child-age-calculator-container .results-table th,
  .parent-child-age-calculator-container .results-table td {
    padding: 8px 6px;
    font-size: 14px;
  }
  
  .parent-child-age-calculator-container .button-group {
    flex-direction: column;
    gap: 4px;
  }
}