/**
 * MX Printworks — Landing Page Stylesheet
 * @file index.css
 * @version 2.0
 * @author Tom Cranstoun
 *
 * @mx:category mx-corporate
 * @mx:status active
 * @mx:contentType stylesheet
 * @mx:tags printworks, publishing, landing-page
 * @mx:partOf allaboutv2
 */

/* Root Variables — Light Mode Default */
:root {
  /* Colours — Light Mode */
  --primary-bg: #ffffff;
  --primary-text: #1a1a1a;
  --secondary-text: #4a4a4a;
  --heading-color: #2d3748;
  --accent-color: #0066cc;
  --accent-hover: #004499;
  --border-color: #e1e4e8;
  --code-bg: #f6f8fa;
  --code-border: #e1e4e8;
  --intro-bg: #f8f9fa;
  --skip-link-bg: #000000;
  --skip-link-text: #ffffff;
  --principle-bg: #f8f9fa;
  --principle-border: #e1e4e8;
  --principle-number-color: #0066cc;

  /* Typography */
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;

  /* Spacing */
  --max-width: 800px;
  --spacing-unit: 1rem;

  /* Typography Scale */
  --font-size-h1: 2.5rem;
  --font-size-h2: 1.875rem;
  --font-size-h3: 1.5rem;
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  :root {
    --primary-bg: #1a1a1a;
    --primary-text: #e0e0e0;
    --secondary-text: #b0b0b0;
    --heading-color: #e0e0e0;
    --accent-color: #66a3ff;
    --accent-hover: #99c2ff;
    --border-color: #404040;
    --code-bg: #2a2a2a;
    --code-border: #404040;
    --intro-bg: #2a2a2a;
    --skip-link-bg: #ffffff;
    --skip-link-text: #000000;
    --principle-bg: #242424;
    --principle-border: #404040;
    --principle-number-color: #66a3ff;
  }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --primary-text: #000000;
    --secondary-text: #000000;
    --heading-color: #000000;
    --accent-color: #0000ff;
    --accent-hover: #000080;
    --border-color: #000000;
    --principle-border: #000000;
  }
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-body);
  line-height: 1.6;
  color: var(--primary-text);
  background-color: var(--primary-bg);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* Skip to Content Link (WCAG Accessibility) */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--skip-link-bg);
  color: var(--skip-link-text);
  padding: 0.5rem 1rem;
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--skip-link-text);
  outline-offset: 2px;
}

/* Page Header */
.page-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--border-color);
}

.page-header h1 {
  font-size: var(--font-size-h1);
  line-height: 1.2;
  color: var(--heading-color);
  margin-bottom: 0.5rem;
}

.tagline {
  font-size: 1.2rem;
  color: var(--secondary-text);
  font-style: italic;
}

/* Introduction */
.introduction {
  background-color: var(--intro-bg);
  border-left: 4px solid var(--accent-color);
  padding: 1.5rem;
  margin-bottom: 2rem;
  border-radius: 4px;
}

.introduction p {
  margin-bottom: 0.75rem;
  color: var(--primary-text);
}

.introduction p:last-child {
  margin-bottom: 0;
}

/* Principle Sections (card style) */
.principle {
  margin-bottom: 2.5rem;
  padding: 1.5rem;
  background-color: var(--principle-bg);
  border: 1px solid var(--principle-border);
  border-radius: 6px;
  border-left: 4px solid var(--principle-number-color);
}

.principle h2 {
  font-size: var(--font-size-h2);
  color: var(--heading-color);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--principle-border);
}

.principle p {
  margin-bottom: 1rem;
  color: var(--primary-text);
}

.principle p:last-child {
  margin-bottom: 0;
}

/* Lists */
.principle ul {
  list-style: none;
  padding-left: 0;
  margin-bottom: 1rem;
}

.principle li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.4rem;
}

.principle li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent-color);
}

/* Standout text */
.standout {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--accent-color);
  text-align: center;
  padding: 0.5rem 0;
}

/* CTA section */
.cta {
  text-align: center;
}

.cta a {
  font-size: 1.1rem;
  font-weight: 600;
}

/* Links */
a {
  color: var(--accent-color);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  color: var(--accent-hover);
}

a:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
  text-decoration: underline;
}

/* Explore Section */
.explore {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 2px solid var(--border-color);
}

.explore h2 {
  font-size: var(--font-size-h2);
  color: var(--heading-color);
  margin-bottom: 1rem;
}

.explore ul {
  list-style: none;
  padding-left: 0;
}

.explore li {
  margin-bottom: 0.75rem;
  padding-left: 1.5rem;
  position: relative;
}

.explore li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent-color);
}

/* Horizontal Rules */
hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 3rem 0;
}

/* Footer */
footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--secondary-text);
  font-size: 0.9rem;
}

/* Reduced Motion Support (WCAG 2.3.3) */
@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;
  }
}

/* Print Styles */
@media print {
  .skip-link {
    display: none;
  }

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: var(--secondary-text);
  }

  body {
    max-width: 100%;
    padding: 0;
  }

  .principle {
    break-inside: avoid;
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }

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

/* Responsive Design */
@media (max-width: 768px) {
  body {
    padding: 1rem;
  }

  .page-header h1 {
    font-size: 2rem;
  }

  .principle h2 {
    font-size: 1.5rem;
  }

  .standout {
    font-size: 1.15rem;
  }
}