/* CSS Variables for theming and consistency */
:root {
  /* Colors */
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary-color: #64748b;
  --accent-color: #f59e0b;
  --success-color: #10b981;
  --error-color: #ef4444;

  /* Text Colors */
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;

  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-overlay: rgba(0, 0, 0, 0.5);

  /* Border Colors */
  --border-color: #e5e7eb;
  --border-focus: #2563eb;

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

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  /* Layout */
  --container-max-width: 1200px;
  --header-height: 64px;
}

/* Dark theme variables */
[data-theme="dark"] {
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-muted: #9ca3af;
  --bg-primary: #111827;
  --bg-secondary: #1f2937;
  --bg-tertiary: #374151;
  --border-color: #374151;
}

/* Reset and base styles */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-primary);
}

body {
  min-height: 100vh;
  background-color: var(--bg-primary);
}

/* Utility classes */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

@media (min-width: 640px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }

.mb-2 { margin-bottom: var(--spacing-xs); }
.mb-4 { margin-bottom: var(--spacing-sm); }
.mb-6 { margin-bottom: var(--spacing-md); }
.mb-8 { margin-bottom: var(--spacing-lg); }
.mb-12 { margin-bottom: var(--spacing-xl); }

.mt-2 { margin-top: var(--spacing-xs); }
.mt-4 { margin-top: var(--spacing-sm); }
.mt-6 { margin-top: var(--spacing-md); }
.mt-8 { margin-top: var(--spacing-lg); }
.mt-12 { margin-top: var(--spacing-xl); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

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

.btn-secondary {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-tertiary);
}

/* Header */
.header {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav {
  height: var(--header-height);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  gap: var(--spacing-lg);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary-color), #1e40af);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 18px;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
}

.logo-text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--primary-color);
  margin: 0;
  letter-spacing: -0.025em;
}

.logo a {
  text-decoration: none;
}

/* Search */
.search-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex: 1;
  max-width: 400px;
}

.search-input {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

.search-input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-button {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--primary-color);
  color: white;
  border: 1px solid var(--primary-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.search-button:hover {
  background-color: var(--primary-hover);
}

/* Menu toggle for mobile */
.menu-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.menu-toggle span {
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  margin: 2px 0;
  transition: 0.3s;
}

/* Navigation menu */
.nav-menu {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-menu a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-menu a:hover {
  color: var(--primary-color);
}

/* Menu toggle button - hidden by default on desktop */
.menu-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.menu-toggle span {
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  margin: 2px 0;
  transition: 0.3s;
}

/* Mobile styles */
@media (max-width: 768px) {
  .nav-container {
    padding: 0 var(--spacing-sm);
  }

  .search-container {
    margin: 0 var(--spacing-sm);
    flex: 1;
  }

  .menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
}

/* Main content */
.main {
  min-height: calc(100vh - var(--header-height) - 200px);
}

/* Hero section */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
  color: white;
  padding: var(--spacing-2xl) 0;
}

.hero-container {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  padding: 0 var(--spacing-md);
}

.hero h2 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
}

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

.hero-search {
  max-width: 600px;
  margin: 0 auto;
}

/* Categories section */
.categories {
  padding: var(--spacing-2xl) 0;
  background-color: var(--bg-secondary);
}

.categories h3 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--text-primary);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.category-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.category-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
}

.category-card h4 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
}

.category-card p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

/* Popular calculators */
.popular-calculators {
  padding: var(--spacing-2xl) 0;
}

.popular-calculators h3 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--text-primary);
}

.calculators-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.calculator-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
  position: relative;
}

.calculator-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
}

.calculator-card:not(.coming-soon) {
  cursor: pointer;
}

.calculator-card:not(.coming-soon):hover .calculator-link {
  color: var(--primary-hover);
  text-decoration: underline;
}

/* Legal Pages Styling */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
}

.legal-content section {
  margin-bottom: 2rem;
}

.legal-content h2 {
  color: var(--text-primary);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.legal-content h3 {
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem 0;
}

.legal-content p {
  margin-bottom: 1rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.legal-content ul {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.legal-content li {
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.legal-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

.disclaimer-box {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.disclaimer-box p {
  margin: 0;
  font-weight: 600;
}

.disclaimer-footer {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.disclaimer-footer p {
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.disclaimer-footer strong {
  color: var(--text-primary);
}

.calculator-card h4 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.calculator-card p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-md);
}

.calculator-card a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

.calculator-card a:hover {
  text-decoration: underline;
}

/* Coming Soon Badge */
.coming-soon-badge {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: #f59e0b;
  color: #ffffff;
  border-radius: 0.375rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: none;
}

.calculator-card.coming-soon {
  opacity: 0.8;
  position: relative;
}

/* Subcategory Tabs */
.subcategory-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-md);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.tab-button {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.tab-button:hover {
  background-color: var(--bg-primary);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.tab-button.active {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: var(--text-on-primary);
  font-weight: 600;
}

/* Navigation Dropdowns */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-menu > a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  position: relative;
}

.nav-menu > a:hover {
  background-color: var(--bg-secondary);
  color: var(--primary-color);
}

/* Dropdown Menu Styles */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-toggle {
  cursor: pointer;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.dropdown-toggle:hover {
  background-color: var(--bg-secondary);
}

.dropdown-toggle::after {
  content: '▼';
  font-size: 0.75rem;
  transition: transform 0.2s ease;
}

.dropdown.open .dropdown-toggle::after {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s ease;
  z-index: 1000;
  margin-top: var(--spacing-xs);
}

.dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-primary);
  text-decoration: none;
  transition: all 0.2s ease;
  border-bottom: 1px solid var(--border-color);
}

.dropdown-item:last-child {
  border-bottom: none;
}

.dropdown-item:hover {
  background-color: var(--bg-secondary);
  color: var(--primary-color);
}

.dropdown-item i {
  margin-right: var(--spacing-sm);
  width: 16px;
  text-align: center;
}

/* Mobile Menu Styles */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
  }

  .nav-menu.mobile-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    margin-left: var(--spacing-md);
  }

  .mobile-menu-toggle span {
    width: 100%;
    height: 3px;
    background-color: var(--text-primary);
    transition: all 0.3s ease;
    border-radius: 2px;
  }

  .mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  /* Mobile dropdown styles */
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    margin-top: var(--spacing-sm);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
  }

  .dropdown.open .dropdown-menu {
    display: block;
  }

  .dropdown-toggle::after {
    content: '+';
    font-size: 1rem;
    transition: transform 0.2s ease;
  }

  .dropdown.open .dropdown-toggle::after {
    transform: rotate(45deg);
  }
}

/* Category Description */
.category-description {
  margin-top: 3rem;
  padding: 2rem 0;
  border-top: 1px solid #e5e7eb;
}

.category-description h2 {
  text-align: center;
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2rem;
}

.description-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.description-item {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}

.description-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.description-item h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.75rem;
}

.description-item p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.5;
}

/* Features section */
.features {
  padding: var(--spacing-2xl) 0;
  background-color: var(--bg-secondary);
}

.features h3 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--text-primary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.feature-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.feature-card h4 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

/* Footer */
.footer {
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.footer-section p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-md);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-sm);
}

.footer-section ul li a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color 0.2s ease;
}

.footer-section ul li a:hover {
  color: var(--primary-color);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacing-lg);
  text-align: center;
}

.footer-bottom p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-overlay);
  z-index: 1000;
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background-color: var(--bg-primary);
  border-radius: var(--radius-lg);
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  cursor: pointer;
  color: var(--text-secondary);
  padding: var(--spacing-xs);
}

.search-results {
  padding: var(--spacing-lg);
}

/* Loading and empty states */
.loading {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-secondary);
}

.empty {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-muted);
}

/* Accessibility */
.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;
}

/* Focus styles */
.btn:focus,
.search-input:focus,
.category-card:focus,
.calculator-card:focus {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* Breadcrumb navigation */
.breadcrumb {
  margin-bottom: var(--spacing-lg);
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  gap: var(--spacing-sm);
  padding: 0;
  margin: 0;
  font-size: var(--font-size-sm);
}

.breadcrumb li {
  color: var(--text-secondary);
}

.breadcrumb li:not(:last-child)::after {
  content: '/';
  margin-left: var(--spacing-sm);
  color: var(--text-muted);
}

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

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

.breadcrumb li[aria-current="page"] {
  color: var(--text-primary);
  font-weight: 500;
}

/* Calculator layout */
.calculator-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-xl);
}

@media (min-width: 1024px) {
  .calculator-layout {
    grid-template-columns: 400px 1fr;
  }
}

/* Content grid for calculator pages - matches calculator-layout behavior */
.content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-xl);
}

/* Desktop: side-by-side layout */
@media (min-width: 1024px) {
  .content-grid {
    grid-template-columns: 400px 1fr;
  }
}

.calculator-section {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

.calculator-header {
  margin-bottom: var(--spacing-xl);
}

.calculator-header h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.calculator-header p {
  color: var(--text-secondary);
  font-size: var(--font-size-base);
}

.calculator-form {
  margin-bottom: var(--spacing-xl);
}

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

.calculator-instruction {
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background-color: #f8fafc;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary-color);
}

.calculator-instruction p {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.calculator-tip {
  margin-top: var(--spacing-lg);
  text-align: center;
}

.calculator-tip small {
  font-style: italic;
}

/* Percentage input styling */
.calculator-input-group {
  position: relative;
}

.calculator-input-group .percent-symbol {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: #9ca3af;
  font-size: 1rem;
  font-weight: 600;
  pointer-events: none;
  z-index: 1;
}

/* Input field with percentage symbol needs extra padding */
.calculator-input-group.has-percent input {
  padding-right: 2.5rem;
}

.calculator-input-group label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.calculator-input-group input,
.calculator-input-group select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

.calculator-input-group input:focus,
.calculator-input-group select:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.calculator-result {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  min-height: 100px;
}

.calculator-result h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.result-value {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.result-steps {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

.calculator-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.content-section {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

.content-section h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.content-section h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.content-section p {
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
  color: var(--text-secondary);
}

.content-section ul,
.content-section ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-xl);
}

.content-section li {
  margin-bottom: var(--spacing-sm);
  line-height: 1.6;
  color: var(--text-secondary);
}

.content-section table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-md);
}

.content-section th,
.content-section td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.content-section th {
  background-color: var(--bg-secondary);
  font-weight: 600;
  color: var(--text-primary);
}

.content-section code {
  background-color: var(--bg-secondary);
  padding: 2px var(--spacing-xs);
  border-radius: var(--radius-sm);
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.9em;
  color: var(--text-primary);
}

.content-section blockquote {
  border-left: 4px solid var(--primary-color);
  padding-left: var(--spacing-md);
  margin: var(--spacing-md) 0;
  color: var(--text-secondary);
  font-style: italic;
}

.related-calculators {
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
}

.related-calculators h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.related-calculators ul {
  list-style: none;
  padding: 0;
}

.related-calculators li {
  margin-bottom: var(--spacing-sm);
}

.related-calculators a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

.related-calculators a:hover {
  text-decoration: underline;
}

/* Category page styles */
.category-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  padding: var(--spacing-2xl) 0;
}

.category-header h1 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.category-header p {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Loading states */
.calculator-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  color: var(--text-secondary);
}

.calculator-loading::after {
  content: '';
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top: 2px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-left: var(--spacing-md);
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Error states */
.calculator-error {
  background-color: var(--error-color);
  color: white;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
}

.calculator-error::before {
  content: '⚠️ ';
  font-weight: bold;
}

/* Success states */
.calculator-success {
  background-color: var(--success-color);
  color: white;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
}

.calculator-success::before {
  content: '✅ ';
  font-weight: bold;
}

/* Print styles */
@media print {
  .header,
  .footer,
  .modal,
  .calculator-actions {
    display: none !important;
  }

  .main {
    min-height: auto;
  }

  .calculator-layout {
    grid-template-columns: 1fr;
  }

  .content-grid {
    grid-template-columns: 1fr;
  }

  .calculator-section,
  .content-section {
    box-shadow: none;
    border: 1px solid #000;
  }
}