/* Main CSS - Design System for MapUnitedStates.com */

/* ===== CSS Variables ===== */
:root {
  /* Colors - Geographic Theme */
  --primary-blue: #2563eb;
  --primary-blue-dark: #1e40af;
  --primary-blue-light: #3b82f6;
  --secondary-green: #059669;
  --secondary-green-dark: #047857;
  --accent-orange: #f59e0b;

  /* Neutrals */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* Spacing Grid (8px base) */
  --space-1: 0.5rem;   /* 8px */
  --space-2: 1rem;     /* 16px */
  --space-3: 1.5rem;   /* 24px */
  --space-4: 2rem;     /* 32px */
  --space-5: 2.5rem;   /* 40px */
  --space-6: 3rem;     /* 48px */
  --space-8: 4rem;     /* 64px */

  /* Typography */
  --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Courier New', monospace;

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

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
  }
}

/* ===== Global Styles ===== */
html {
  scroll-behavior: smooth;
}

body {
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--primary-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-blue-dark);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--primary-blue);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ===== Layout Components ===== */
.hero {
  padding: var(--space-8) 0;
  text-align: center;
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
}

.hero h1 {
  margin-bottom: var(--space-3);
  color: var(--gray-900);
}

.hero p {
  font-size: 1.25rem;
  color: var(--gray-600);
  max-width: 42rem;
  margin: 0 auto var(--space-4);
}

.section {
  padding: var(--space-6) 0;
}

.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ===== Components ===== */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  min-height: 48px;
  gap: 0.5rem;
}

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

.btn-primary:hover {
  background: var(--primary-blue-dark);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: white;
  color: var(--primary-blue);
  border: 2px solid var(--primary-blue);
}

.btn-secondary:hover {
  background: var(--primary-blue);
  color: white;
  text-decoration: none;
}

/* Cards */
.card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card h3 {
  color: var(--gray-900);
  margin-bottom: var(--space-2);
}

.card p {
  color: var(--gray-600);
  font-size: 0.95rem;
}

/* State Card Specific */
.state-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.state-card .state-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-1);
}

.state-card .state-capital {
  font-size: 0.875rem;
  color: var(--gray-500);
  margin-bottom: var(--space-2);
}

.state-card .state-stats {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: var(--space-2);
  border-top: 1px solid var(--gray-200);
}

.state-card .stat {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
}

.state-card .stat-label {
  color: var(--gray-500);
}

.state-card .stat-value {
  font-weight: 600;
  color: var(--gray-900);
}

/* Interactive Map Styles */
.map-container {
  position: relative;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-4);
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.map-svg {
  width: 100%;
  height: auto;
  display: block;
}

.state-path {
  fill: var(--gray-200);
  stroke: white;
  stroke-width: 1.5;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.state-path:hover {
  fill: var(--primary-blue-light);
  stroke: var(--primary-blue-dark);
  stroke-width: 2;
}

.state-path:focus {
  outline: none;
  fill: var(--primary-blue);
  stroke: var(--primary-blue-dark);
  stroke-width: 2.5;
}

.state-path.active {
  fill: var(--primary-blue);
}

/* Navigation Menu */
.nav-menu {
  display: flex;
  gap: var(--space-3);
  list-style: none;
  align-items: center;
}

.nav-menu a {
  color: var(--gray-700);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-menu a:hover {
  background: var(--gray-100);
  color: var(--primary-blue);
  text-decoration: none;
}

.nav-menu a.active {
  background: var(--primary-blue);
  color: white;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  min-height: 48px;
  min-width: 48px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--gray-700);
  margin: 5px 0;
  transition: var(--transition-base);
}

/* Search Box */
.search-box {
  position: relative;
  width: 100%;
  max-width: 400px;
}

.search-input {
  width: 100%;
  padding: 0.75rem 1rem;
  padding-left: 2.5rem;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

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

.search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-400);
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: var(--space-2) 0;
  font-size: 0.875rem;
  color: var(--gray-500);
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--gray-600);
}

.breadcrumbs a:hover {
  color: var(--primary-blue);
}

.breadcrumbs .separator {
  color: var(--gray-400);
}

/* Info Box / Callout */
.info-box {
  background: var(--gray-50);
  border-left: 4px solid var(--primary-blue);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  margin: var(--space-4) 0;
}

.info-box h4 {
  color: var(--primary-blue);
  margin-bottom: var(--space-1);
}

/* Data Table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-4) 0;
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.data-table th,
.data-table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}

.data-table th {
  background: var(--gray-50);
  font-weight: 600;
  color: var(--gray-700);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.data-table tr:hover {
  background: var(--gray-50);
}

.data-table tr:last-child td {
  border-bottom: none;
}

/* Footer */
.footer {
  background: var(--gray-900);
  color: var(--gray-300);
  padding: var(--space-6) 0 var(--space-4);
  margin-top: var(--space-8);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.footer h4 {
  color: white;
  margin-bottom: var(--space-2);
  font-size: 1rem;
}

.footer ul {
  list-style: none;
}

.footer ul li {
  margin-bottom: 0.5rem;
}

.footer a {
  color: var(--gray-400);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer a:hover {
  color: white;
  text-decoration: none;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-4);
  border-top: 1px solid var(--gray-700);
  font-size: 0.875rem;
  color: var(--gray-500);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.hidden { display: none; }

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-2);
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: var(--space-2);
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--gray-200);
  }

  .nav-menu.active {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }

  .hero {
    padding: var(--space-6) 0;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .data-table {
    font-size: 0.875rem;
  }

  .data-table th,
  .data-table td {
    padding: 0.75rem 0.5rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .section {
    padding: var(--space-4) 0;
  }
}

/* ===== Print Styles ===== */
@media print {
  .header,
  .footer,
  .nav,
  .btn,
  .menu-toggle,
  .search-box {
    display: none;
  }

  body {
    background: white;
  }

  .map-container {
    box-shadow: none;
    border: 1px solid black;
  }

  a {
    color: black;
    text-decoration: underline;
  }

  .card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid var(--gray-300);
  }
}

/* ===== 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-width: 0;
}

.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary-blue);
  color: white;
  padding: var(--space-2);
  z-index: 1000;
  text-decoration: none;
}

.skip-to-content:focus {
  top: 0;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}