/* CSS Custom Properties for theming */
:root {
  --color-primary: #4a90e2;
  --color-primary-dark: #357abd;
  --color-secondary: #2c3e50;
  --color-accent: #27ae60;
  --color-background: #1a1a1a;
  --color-surface: #2d2d2d;
  --color-surface-light: #3a3a3a;
  --color-text-primary: #ffffff;
  --color-text-secondary: #b0b0b0;
  --color-text-muted: #808080;
  --color-border: #404040;
  
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-xxl: 1.5rem;
  --font-size-xxxl: 2rem;
  
  --border-radius: 0.5rem;
  --border-radius-lg: 1rem;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
}

/* Reset and base styles */
* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-background);
  margin: 0;
  padding: var(--spacing-md);
  font-size: var(--font-size-base);
  /* Improve text rendering */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-primary);
  margin-top: 0;
  margin-bottom: var(--spacing-lg);
  line-height: 1.3;
  font-weight: 600;
}

h1 {
  font-size: var(--font-size-xxxl);
  margin-bottom: var(--spacing-xl);
  text-align: center;
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: var(--spacing-md);
}

h2 {
  font-size: var(--font-size-xxl);
  color: var(--color-primary);
  margin-top: var(--spacing-xxl);
  margin-bottom: var(--spacing-lg);
}

h3 {
  font-size: var(--font-size-xl);
  color: var(--color-accent);
}

p {
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-secondary);
}

/* Links */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease;
  /* Ensure minimum touch target size */
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--spacing-xs);
}

a:hover,
a:focus {
  color: var(--color-primary-dark);
  background-color: rgba(74, 144, 226, 0.1);
  outline: 2px solid transparent;
}

a:active {
  background-color: rgba(74, 144, 226, 0.2);
}

/* Focus styles for accessibility */
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Lists */
ul, ol {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-xl);
}

li {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
}

/* Images */
img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  /* Prevent layout shift */
  display: block;
}

/* Responsive image containers */
.image-container {
  text-align: center;
  margin: var(--spacing-lg) 0;
}

/* Tables - Mobile-first approach */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-xl) 0;
  background-color: var(--color-surface);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

/* Mobile table styling */
thead {
  background-color: var(--color-secondary);
}

th, td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-primary);
  vertical-align: top;
}

th {
  font-weight: 600;
  color: var(--color-text-primary);
  background-color: var(--color-primary);
}

/* Zebra striping for better readability */
tbody tr:nth-child(even) {
  background-color: var(--color-surface-light);
}

tbody tr:hover {
  background-color: rgba(74, 144, 226, 0.1);
}

/* Table images */
td img {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: var(--border-radius);
  margin: 0;
}

/* Container for better content structure */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Card-like sections */
.section {
  background-color: var(--color-surface);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-md);
}

/* Guide grid for better organization */
.guide-grid {
  display: grid;
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.guide-card {
  background-color: var(--color-surface);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.guide-card img {
  width: 100%;
  max-width: 120px;
  height: 80px;
  object-fit: cover;
  margin-bottom: var(--spacing-md);
}

/* QR Code styling */
.qr-code {
  text-align: center;
  margin: var(--spacing-xxl) 0;
}

.qr-code img {
  width: 150px;
  height: 150px;
  border: 2px solid var(--color-border);
}

/* Responsive breakpoints */
@media (min-width: 480px) {
  body {
    padding: var(--spacing-lg);
  }
  
  .guide-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
  
  td img {
    width: 80px;
    height: 80px;
  }
}

@media (min-width: 768px) {
  body {
    padding: var(--spacing-xl);
  }
  
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 2rem;
  }
  
  /* Better table layout on larger screens */
  .table-wrapper {
    overflow-x: auto;
  }
  
  td img {
    width: 100px;
    height: 100px;
  }
  
  .guide-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
  }
  
  .guide-card img {
    flex: 0 0 120px;
    margin-bottom: 0;
  }
}

@media (min-width: 1024px) {
  .guide-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .container {
    padding: 0 var(--spacing-lg);
  }
}

/* Print styles */
@media print {
  body {
    background: white;
    color: black;
  }
  
  .guide-card,
  .section {
    background: white;
    box-shadow: none;
    border: 1px solid #ccc;
  }
  
  a {
    color: #0066cc;
    text-decoration: underline;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-background: #000000;
    --color-text-primary: #ffffff;
    --color-primary: #00ccff;
  }
}

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