:root {
  /* Brand Colors */
  --primary: #1a365d;
  --primary-color: #1a365d; /* Alias for consistency */
  --primary-dark: #0f2a44; /* Add this missing variable */
  --secondary: #2c7a7b;
  --accent: #ed8936;
  --dark: #2d3748;
  --gray: #718096;
  --light-gray: #e2e8f0;
  --very-light: #f7fafc;
  --white: #ffffff;

  /* Light Theme */
  --bg-primary: var(--very-light);
  --bg-secondary: var(--white);
  --bg-color: var(--very-light); /* Alias for consistency */
  --card-bg: var(--white); /* Alias for consistency */
  --text-primary: var(--dark);
  --text-secondary: var(--gray);
  --text-color: var(--dark); /* Alias for consistency */
  --text-light: var(--gray); /* Alias for consistency */
  --border-color: var(--light-gray);
  
  /* Font */
  --font-family: 'Inter', sans-serif;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;

  /* Border Radius */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);

  /* Transitions */
  --transition-fast: 0.2s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
}

[data-theme="dark"] {
  --bg-primary: #1a202c;
  --bg-secondary: #2d3748;
  --bg-color: #1a202c;
  --card-bg: #2d3748;
  --text-primary: var(--very-light);
  --text-secondary: var(--light-gray);
  --text-color: var(--very-light);
  --text-light: var(--light-gray);
  --border-color: #4a5568;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Header & Navigation */
header {
  background-color: var(--bg-secondary);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
}

.logo {
  display: flex;
  align-items: center;
  font-weight: 700;
}

.favicon {
  font-size: 1.5rem;
  margin-right: var(--spacing-xs);
}

.brand-name {
  font-size: 1.2rem;
  color: var(--primary);
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-links a {
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a:hover {
  color: var(--secondary);
}

.nav-links a.active {
  color: var(--secondary);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--secondary);
  border-radius: 2px;
}

.theme-toggle {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  transition: transform var(--transition-fast);
  padding: var(--spacing-xs);
}

.theme-toggle:hover {
  transform: scale(1.1);
}

/* Hero Section */
.hero {
  padding: var(--spacing-xxl) 0;
  background-color: var(--primary);
  color: var(--white);
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  font-weight: 700;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-xl);
  opacity: 0.9;
}

.cta-button {
  display: inline-block;
  background-color: var(--accent);
  color: var(--white);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--border-radius-md);
  text-decoration: none;
  font-weight: 600;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.cta-button:hover {
  background-color: #dd7722;
  transform: translateY(-2px);
}

/* Calculator Page Layout */
.calculator-page {
  padding: var(--spacing-xl) 0;
  min-height: calc(100vh - 200px);
}

.breadcrumb {
  margin-bottom: var(--spacing-lg);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.breadcrumb a {
  color: var(--secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.calculator-page h1 {
  font-size: 2.2rem;
  margin-bottom: var(--spacing-md);
  color: var(--primary);
  font-weight: 700;
}

.calculator-intro {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

/* Calculator Card Enhancements */
.calculator-card {
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
  transition: transform var(--transition-fast), box-shadow var(--transition-normal), background-color 0.3s ease;
  border: 1px solid var(--border-color);
}

.calculator-card.highlight {
  background-color: var(--light-gray);
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .calculator-card.highlight {
  background-color: var(--dark);
}

/* Input Groups */
.calculator-inputs {
  display: grid;
  gap: var(--spacing-lg);
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.input-group label {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.input-group input, 
.input-group select {
  padding: var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-md);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input-group input:focus,
.input-group select:focus {
  outline: none;
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(44, 122, 123, 0.1);
}

.input-group small {
  display: block;
  margin-top: 4px;
  color: var(--text-light);
  font-size: 0.85rem;
}

/* Calculate Button */
.calculate-button {
  background-color: var(--secondary);
  color: var(--white);
  border: none;
  border-radius: var(--border-radius-md);
  padding: var(--spacing-md) var(--spacing-xl);
  font-family: var(--font-family);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  margin-top: var(--spacing-md);
  height: 48px;
  min-height: 48px;
  line-height: 1.2;
  box-sizing: border-box;
}

.calculate-button:hover {
  background-color: #236c6c;
  transform: translateY(-2px);
}

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

/* Calculator Results */
.calculator-results {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

.result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  background-color: var(--bg-primary);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
}

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

.result-value {
  font-weight: 700;
  color: var(--secondary);
  font-size: 1.1rem;
}

.result-value.positive {
  color: #10b981;
}

.result-value.negative {
  color: #ef4444;
}

/* Section Styling */
.section-title {
  color: var(--primary-color);
  font-size: 1.5rem;
  margin: 30px 0 20px;
  padding-top: 20px;
  border-top: 2px solid var(--border-color);
}

.section-title:first-child {
  border-top: none;
  padding-top: 0;
}

/* Card Layouts */
.formula-grid,
.concept-grid,
.comparison-grid,
.examples-grid,
.concept-tabs,
.applications-grid,
.tips-grid,
.education-grid,
.benefits-grid,
.steps-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.formula-card,
.concept-card,
.comparison-item,
.example-card,
.concept-tab,
.application-card,
.tip-card,
.education-card,
.benefit-item,
.step-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  transition: all 0.3s ease;
}

.formula-card:hover,
.concept-card:hover,
.example-card:hover,
.application-card:hover,
.education-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Formula and Code Styling */
.formula-box,
.formula-highlight {
  background: var(--bg-color);
  border-radius: 8px;
  padding: 16px;
  margin: 16px 0;
  border: 1px solid var(--border-color);
}

.formula {
  display: block;
  font-family: 'Courier New', monospace;
  font-size: 1.1rem;
  color: var(--text-color);
  background: rgba(59, 130, 246, 0.05);
  padding: 12px;
  border-radius: 6px;
  text-align: center;
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.metric-formula {
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 4px;
  padding: 8px;
  margin: 8px 0;
  font-family: 'Courier New', monospace;
  font-size: 0.85rem;
  color: var(--primary);
}

/* Variables and Lists */
.variables-grid {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.variable-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px;
  background: var(--bg-color);
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.variable-symbol {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--primary-color);
  background: rgba(59, 130, 246, 0.1);
  padding: 8px 16px;
  border-radius: 6px;
  min-width: 60px;
  text-align: center;
}

.styled-list {
  list-style: none;
  padding: 0;
}

.styled-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 8px;
  color: var(--text-light);
}

.styled-list li:before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

/* Tables */
.comparison-table,
.cost-comparison table,
.aid-impact-table table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin: 20px 0;
}

.comparison-table th,
.cost-comparison th,
.aid-impact-table th {
  background: var(--primary-color);
  color: white;
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
}

.comparison-table td,
.cost-comparison td,
.aid-impact-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table tr:last-child td,
.cost-comparison tr:last-child td,
.aid-impact-table tr:last-child td {
  border-bottom: none;
}

.comparison-table tr:hover,
.cost-comparison tr:hover,
.aid-impact-table tr:hover {
  background: rgba(59, 130, 246, 0.05);
}

/* Icons and Numbers */
.card-icon,
.calculator-icon,
.benefit-icon,
.tip-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.concept-number,
.step-number {
  width: 36px;
  height: 36px;
  background: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  margin: 0 auto 12px;
  font-size: 1.2rem;
}

/* Info Boxes and Highlights */
.info-box,
.curve-explanation,
.tax-example {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(99, 102, 241, 0.05) 100%);
  border-left: 4px solid var(--primary-color);
  padding: 24px;
  border-radius: 8px;
  margin: 30px 0;
}

.discount-breakdown,
.duration-analysis,
.comparison-analysis,
.affordability-analysis {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  margin-top: 20px;
}

/* Feature Tags and Labels */
.calculator-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 15px 0;
}

.feature-tag {
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid rgba(59, 130, 246, 0.2);
}

/* Dark Mode Adjustments */
[data-theme="dark"] .feature-tag {
  background: rgba(59, 130, 246, 0.2);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

[data-theme="dark"] .formula {
  background: rgba(59, 130, 246, 0.1);
  border-color: rgba(59, 130, 246, 0.3);
}

[data-theme="dark"] .comparison-table,
[data-theme="dark"] .cost-comparison table,
[data-theme="dark"] .aid-impact-table table {
  box-shadow: var(--shadow-lg);
}

/* Tools Grid Styling */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.tool-card {
    background: var(--card-bg); /* Change from var(--card-background) to var(--card-bg) */
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.tool-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.tool-card p {
    color: var(--text-color);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.tool-link {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.tool-link:hover {
    background: var(--primary-dark);
}

/* Content Section Styling */
.content-section {
    background: var(--section-background, #f8f9fa);
    padding: 4rem 0;
}

.content-block {
    margin-bottom: 3rem;
}

.content-block h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.content-block p {
    color: var(--text-color);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.content-block ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.content-block li {
    color: var(--text-color);
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

/* Responsive Enhancements */
@media (max-width: 768px) {
  .calculator-page h1 {
    font-size: 1.8rem;
  }
  
  .calculator-intro {
    font-size: 1rem;
  }
  
  .calculator-card {
    padding: var(--spacing-lg);
  }
  
  .calculator-inputs {
    grid-template-columns: 1fr;
  }
  
  .formula-grid,
  .concept-grid,
  .comparison-grid,
  .examples-grid,
  .concept-tabs,
  .applications-grid,
  .tips-grid,
  .education-grid,
  .benefits-grid,
  .steps-section {
    grid-template-columns: 1fr;
  }
  
  .variable-item {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }
  
  .result-item {
    flex-direction: column;
    gap: var(--spacing-xs);
    text-align: center;
  }
  
  .comparison-table,
  .cost-comparison,
  .aid-impact-table {
    overflow-x: auto;
    display: block;
    white-space: nowrap;
  }
}

@media (max-width: 480px) {
  .calculator-page {
    padding: var(--spacing-lg) 0;
  }
  
  .calculator-page h1 {
    font-size: 1.6rem;
  }
  
  .section-title {
    font-size: 1.3rem;
  }
  
  .calculator-card {
    padding: var(--spacing-md);
  }
  
  .concept-number,
  .step-number {
    width: 30px;
    height: 30px;
    font-size: 1rem;
  }
}

/* ROAS Calculator Styles */
.platform-comparison {
    margin: 40px 0;
}

.strategy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.strategy-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    transition: all 0.3s ease;
}

.strategy-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

.strategy-card h3 {
    color: var(--primary);
    margin-bottom: 16px;
}

.metrics-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.metric-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.metric-card h3 {
    color: var(--primary);
    margin-bottom: 12px;
    font-size: 1.1rem;
}

.metric-card p {
    margin: 8px 0;
    color: var(--text-light);
}

.metric-card p strong {
    color: var(--text-color);
}

.metric-note {
    font-style: italic;
    font-size: 0.9rem;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

/* Dark mode adjustments */
.dark-mode .strategy-card:hover,
.dark-mode .metric-card {
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

/* Discount Calculator Styles */
.section-title {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin: 20px 0 15px;
    padding-top: 20px;
    border-top: 2px solid var(--border-color);
}

.discount-types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.discount-type-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
}

.discount-type-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

.discount-type-card h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

/* Discount Breakdown */
.discount-breakdown {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-top: 20px;
}

.discount-breakdown h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.breakdown-step {
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.breakdown-step:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.breakdown-step .step-number {
    background: var(--primary-color);
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin-right: 15px;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-description {
    font-weight: 600;
    margin-bottom: 5px;
}

.step-calculation {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 5px;
}

.step-result {
    color: var(--primary-color);
    font-weight: 600;
}

/* College Savings Calculator Styles */
.college-overview {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    margin: 30px 0;
}

/* College Costs */
.college-costs {
    margin: 40px 0;
}

.cost-comparison {
    overflow-x: auto;
    margin: 20px 0;
}

.cost-note {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-top: 10px;
}

/* Savings Strategies */
.savings-strategies {
    margin: 40px 0;
}

.strategy-benefits {
    margin-top: 16px;
}

.strategy-benefits h4 {
    color: var(--primary);
    margin: 12px 0 8px 0;
    font-size: 0.95rem;
}

/* Financial Aid Impact */
.financial-aid-impact {
    margin: 40px 0;
}

.aid-impact-table {
    overflow-x: auto;
    margin: 20px 0;
}

/* Cost Reduction Strategies */
.cost-reduction-strategies {
    margin: 40px 0;
}

.reduction-strategies {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.reduction-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.reduction-section h3 {
    color: var(--primary);
    margin-bottom: 16px;
}

/* Inflation Impact */
.inflation-impact {
    margin: 40px 0;
}

.inflation-examples {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.inflation-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.inflation-card h3 {
    color: var(--primary);
    margin-bottom: 16px;
}

.projection-table h4 {
    color: var(--primary);
    margin: 16px 0 12px 0;
    font-size: 0.95rem;
}

.projection-list {
    list-style: none;
    padding: 0;
}

.projection-list li {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    padding: 8px 12px;
    margin: 4px 0;
    border-radius: 4px;
    font-weight: 500;
}

/* Planning Timeline */
.planning-timeline {
    margin: 40px 0;
}

.timeline-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.timeline-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
}

.timeline-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

.timeline-card h3 {
    color: var(--primary);
    margin-bottom: 16px;
}

/* Affordability Analysis */
.affordability-analysis {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-top: 20px;
}

.affordability-analysis h3 {
    color: var(--primary);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

/* College Tips */
.college-tips {
    margin: 40px 0;
}

/* Bond Calculator Styles */
.bond-overview {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    margin: 30px 0;
}

/* Bond Types */
.bond-types {
    margin: 40px 0;
}

.bond-types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.bond-type-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
}

.bond-type-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

.bond-type-card h3 {
    color: var(--primary);
    margin-bottom: 12px;
}

.bond-desc {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-weight: 500;
}

.bond-features {
    margin-top: 16px;
}

.bond-features h4 {
    color: var(--primary);
    margin: 12px 0 8px 0;
    font-size: 0.95rem;
}

/* Duration Analysis */
.duration-analysis {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-top: 20px;
}

.duration-analysis h3 {
    color: var(--primary);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

/* Comparison Analysis */
.comparison-analysis {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-top: 20px;
}

.comparison-analysis h3 {
    color: var(--primary);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

/* Bond Pricing */
.bond-pricing {
    margin: 40px 0;
}

.pricing-examples {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.pricing-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.pricing-card h3 {
    color: var(--primary);
    margin-bottom: 16px;
}

/* Yield Curve */
.yield-curve {
    margin: 40px 0;
}

.curve-explanation {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.curve-explanation h3 {
    color: var(--primary);
    margin-bottom: 12px;
}

/* Risk Metrics */
.risk-metrics {
    margin: 40px 0;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin: 20px 0;
}

.metric-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
}

.metric-card h4 {
    color: var(--primary);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.metric-formula {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 4px;
    padding: 8px;
    margin: 8px 0;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: var(--primary);
}

/* Interest Rate Risk */
.interest-rate-risk {
    margin: 40px 0;
}

.risk-strategies {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.strategy-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.strategy-section h3 {
    color: var(--primary);
    margin-bottom: 16px;
}

/* Credit Analysis */
.credit-analysis {
    margin: 40px 0;
}

.credit-factors {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.factor-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.factor-section h3 {
    color: var(--primary);
    margin-bottom: 16px;
}

/* Tax Considerations */
.tax-considerations {
    margin: 40px 0;
}

.tax-strategies {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.tax-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.tax-section h3 {
    color: var(--primary);
    margin-bottom: 16px;
}

.tax-example {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 8px;
    padding: 16px;
    margin: 16px 0;
}

.tax-example h4 {
    color: #059669;
    margin-bottom: 12px;
}

.calculation-steps {
    list-style: none;
    padding: 0;
}

.calculation-steps li {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    margin: 4px 0;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

/* Bond Examples */
.bond-examples {
    margin: 40px 0;
}

.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.example-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.example-card h3 {
    color: var(--primary);
    margin-bottom: 16px;
}

.example-details h4 {
    color: var(--primary);
    margin: 16px 0 12px 0;
    font-size: 1rem;
}

.example-inputs {
    display: grid;
    gap: 8px;
    margin-bottom: 16px;
}

.input-item {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 500;
}

.example-results {
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
}

.result-list {
    list-style: none;
    padding: 0;
}

.result-list li {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 6px 10px;
    margin: 4px 0;
    border-radius: 4px;
    font-size: 0.85rem;
}

/* Bond Tips */
.bond-tips {
    margin: 40px 0;
}

/* Footer Styling */
footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-logo .favicon {
    font-size: 1.5rem;
}

.footer-logo .brand-name {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.footer-logo p {
    color: var(--text-light);
    font-size: 0.9rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-column h4 {
    color: var(--primary-color);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-column a {
    display: block;
    color: var(--text-light);
    text-decoration: none;
    padding: 0.25rem 0;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.copyright {
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.copyright p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Footer Responsive Design */
@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    footer {
        padding: 2rem 0 1rem;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .footer-column {
        text-align: center;
    }
}

/* Finance Hub Specific Styles */
.hub-overview {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin: 2rem 0;
}

.overview-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1.5rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 500;
}

/* Calculator Categories */
.calculator-categories {
    margin: 3rem 0;
}

.category-section {
    margin: 3rem 0;
}

.category-section h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.calculators-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.calculator-card-hub {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.calculator-card-hub:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.calculator-card-hub .calculator-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.calculator-card-hub h4 {
    margin-bottom: 1rem;
}

.calculator-card-hub h4 a {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 600;
}

.calculator-card-hub h4 a:hover {
    color: var(--secondary);
    text-decoration: underline;
}

.calculator-card-hub p {
    color: var(--text-color);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.calculator-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.feature-tag {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.calculator-uses {
    margin-top: 1rem;
}

.calculator-uses h5 {
    color: var(--primary-color);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.calculator-uses ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.calculator-uses li {
    color: var(--text-light);
    font-size: 0.85rem;
    padding: 0.25rem 0;
    padding-left: 1rem;
    position: relative;
}

.calculator-uses li:before {
    content: "•";
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* Finance Education Section */
.finance-education {
    margin: 3rem 0;
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.education-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s ease;
}

.education-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.education-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.education-card p {
    color: var(--text-color);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.education-card ul {
    list-style: none;
    padding: 0;
}

.education-card li {
    color: var(--text-light);
    padding: 0.25rem 0;
    padding-left: 1.2rem;
    position: relative;
}

.education-card li:before {
    content: "✓";
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* Calculator Benefits */
.calculator-benefits {
    margin: 3rem 0;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.benefit-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
}

.benefit-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.benefit-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.benefit-item h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.benefit-item p {
    color: var(--text-color);
    line-height: 1.6;
}

/* Getting Started Section */
.getting-started {
    margin: 3rem 0;
}

.steps-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.step-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
}

.step-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin: 0 auto 1rem;
    font-size: 1.2rem;
}

.step-item h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.step-item p {
    color: var(--text-color);
    line-height: 1.6;
}

/* Dark mode adjustments */
[data-theme="dark"] .feature-tag {
    background: rgba(59, 130, 246, 0.2);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .calculators-grid {
        grid-template-columns: 1fr;
    }
    
    .overview-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .calculator-card-hub {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .overview-stats {
        grid-template-columns: 1fr;
    }
    
    .calculator-card-hub {
        padding: 1rem;
    }
}