/* CogNovaMX Homepage Styles
 * @file index.css
 * @version 1.0
 * @author Tom Cranstoun
 *
 * @mx:category mx-tools
 * @mx:status active
 * @mx:contentType stylesheet
 * @mx:tags homepage, landing-page
 * @mx:partOf mx-os
 */

/* Root Variables - Light Mode Default */
:root {
  --primary-bg: #ffffff;
  --primary-text: #1a1a1a;
  --secondary-text: #4a4a4a;
  --heading-color: #2d3748;
  --accent-color: #0066cc;
  --accent-hover: #004499;
  --accent-light: #e8f0fe;
  --border-color: #e1e4e8;
  --alt-bg: #f8f9fa;
  --card-bg: #ffffff;
  --card-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --hero-bg: #1a365d;
  --hero-text: #ffffff;
  --cta-bg: #1a365d;
  --cta-text: #ffffff;
  --skip-link-bg: #000000;
  --skip-link-text: #ffffff;

  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  --max-width: 1100px;
}

/* 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;
    --accent-light: #2a3a4a;
    --border-color: #404040;
    --alt-bg: #222222;
    --card-bg: #2a2a2a;
    --card-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    --hero-bg: #0d1b2a;
    --hero-text: #e0e0e0;
    --cta-bg: #0d1b2a;
    --cta-text: #e0e0e0;
    --skip-link-bg: #ffffff;
    --skip-link-text: #000000;
  }
}

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

/* Reset */
*,
*::before,
*::after {
  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);
}

/* Skip Link */
.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;
}

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

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

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

/* Header */
.site-header {
  background-color: var(--primary-bg);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--heading-color);
  letter-spacing: -0.02em;
}

.header-nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.header-nav a {
  color: var(--secondary-text);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
}

.header-nav a:hover {
  color: var(--accent-color);
  text-decoration: none;
}

/* Hero */
.hero {
  background-color: var(--hero-bg);
  color: var(--hero-text);
  padding: 4rem 1.5rem;
  text-align: center;
}

.hero-inner {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.25rem;
  line-height: 1.2;
  margin-bottom: 1.25rem;
  color: var(--hero-text);
  font-weight: 700;
}

.hero-subtitle {
  font-size: 1.1rem;
  line-height: 1.6;
  opacity: 0.9;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.2s, transform 0.15s;
  min-width: 44px;
  min-height: 44px;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn:focus {
  outline: 2px solid var(--hero-text);
  outline-offset: 2px;
}

.btn-primary {
  background-color: #ffffff;
  color: var(--hero-bg);
}

.btn-primary:hover {
  background-color: #f0f0f0;
  color: var(--hero-bg);
}

.btn-secondary {
  background-color: transparent;
  color: #ffffff;
  border: 2px solid rgba(255, 255, 255, 0.6);
}

.btn-secondary:hover {
  border-color: #ffffff;
  color: #ffffff;
}

/* Content Sections */
.content-section {
  padding: 3.5rem 1.5rem;
}

.content-section.alt-bg {
  background-color: var(--alt-bg);
}

.content-section h2 {
  font-size: 1.875rem;
  color: var(--heading-color);
  margin-bottom: 1rem;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

.content-section > p {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 1.25rem;
  color: var(--primary-text);
}

.section-cta {
  max-width: var(--max-width);
  margin: 2rem auto 0;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.section-cta a {
  font-weight: 600;
}

/* Pillar Grid */
.pillar-grid {
  max-width: var(--max-width);
  margin: 2rem auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.pillar {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: var(--card-shadow);
}

.pillar h3 {
  font-size: 1.25rem;
  color: var(--heading-color);
  margin-bottom: 0.75rem;
}

.pillar p {
  color: var(--secondary-text);
  line-height: 1.6;
}

/* Service Grid */
.service-grid {
  max-width: var(--max-width);
  margin: 2rem auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.service-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: var(--card-shadow);
}

.service-card h3 {
  font-size: 1.15rem;
  color: var(--heading-color);
  margin-bottom: 0.75rem;
}

.service-card p {
  color: var(--secondary-text);
  line-height: 1.6;
  font-size: 0.95rem;
}

/* Resource Grid */
.resource-grid {
  max-width: var(--max-width);
  margin: 2rem auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.resource-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: var(--card-shadow);
}

.resource-card h3 {
  font-size: 1.1rem;
  color: var(--heading-color);
  margin-bottom: 0.5rem;
}

.resource-card p {
  color: var(--secondary-text);
  line-height: 1.5;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.resource-card a {
  font-weight: 600;
  font-size: 0.9rem;
}

/* Book Grid */
.book-grid {
  max-width: var(--max-width);
  margin: 2rem auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.book-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-color);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: var(--card-shadow);
}

.book-card h3 {
  font-size: 1.25rem;
  color: var(--heading-color);
  margin-bottom: 0.75rem;
  font-style: italic;
}

.book-card p {
  color: var(--secondary-text);
  line-height: 1.6;
}

/* About */
.about-content {
  max-width: var(--max-width);
  margin: 0 auto;
}

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

/* CTA Section */
.cta-section {
  background-color: var(--cta-bg);
  color: var(--cta-text);
  padding: 3.5rem 1.5rem;
  text-align: center;
}

.cta-section h2 {
  font-size: 1.875rem;
  margin-bottom: 1rem;
  color: var(--cta-text);
}

.cta-section p {
  max-width: 600px;
  margin: 0 auto 2rem;
  font-size: 1.05rem;
  opacity: 0.9;
}

.cta-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Footer */
.site-footer {
  background-color: var(--alt-bg);
  border-top: 1px solid var(--border-color);
  padding: 3rem 1.5rem 1.5rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-brand {
  margin-bottom: 2rem;
}

.footer-brand strong {
  font-size: 1.1rem;
  color: var(--heading-color);
}

.footer-brand p {
  color: var(--secondary-text);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

.footer-nav {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.footer-col h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--secondary-text);
  margin-bottom: 0.75rem;
}

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

.footer-col li {
  margin-bottom: 0.4rem;
}

.footer-col a {
  color: var(--primary-text);
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: var(--accent-color);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer-bottom p {
  color: var(--secondary-text);
  font-size: 0.85rem;
}

/* Responsive — Tablet */
@media (min-width: 600px) {
  .hero {
    padding: 5rem 2rem;
  }

  .hero h1 {
    font-size: 2.75rem;
  }

  .pillar-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .resource-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .book-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-nav {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Responsive — Desktop */
@media (min-width: 900px) {
  .hero {
    padding: 6rem 2rem;
  }

  .hero h1 {
    font-size: 3rem;
  }

  .content-section {
    padding: 4.5rem 2rem;
  }

  .resource-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 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;
  }
}

/* Print */
@media print {
  .skip-link,
  .site-header,
  .hero-actions,
  .cta-section,
  .cta-actions {
    display: none;
  }

  body {
    color: #000;
    background: #fff;
  }

  .hero {
    background: #fff;
    color: #000;
    padding: 1rem 0;
  }

  .hero h1 {
    color: #000;
  }

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666;
  }
}