/* 
  Landing Hybrid Style
  Exact dezelfde styling als MERN/JS hybrid, maar met meerdere badge kleuren
*/

:root {
  /* Basis kleuren */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --border-color: #e9ecef;
  
  /* Badge kleuren */
  --js-yellow: #f0db4f;
  --react-blue: #61dafb;
  --mongo-green: #0e793b;
  --native-purple: #9b59b6;
  
  /* Accent kleuren */
  --accent-success: #28a745;
  --accent-warning: #ffc107;
  --accent-danger: #dc3545;
}

[data-theme="dark"] {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --text-primary: #e9ecef;
  --text-secondary: #adb5bd;
  --border-color: #495057;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Theme Toggle */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  background: var(--bg-secondary);
  font-size: 24px;
  cursor: pointer;
  z-index: 1000;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  transform: scale(1.1);
  border-color: var(--text-primary);
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 40px 20px;
}

/* Page Header */
.page-header {
  text-align: center;
  margin-bottom: 60px;
  padding-bottom: 40px;
  border-bottom: 2px solid var(--border-color);
}

.page-title {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
  background: linear-gradient(135deg, var(--js-yellow), var(--react-blue), var(--mongo-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
}

/* Content Wrapper - Sidebar + Main */
.content-wrapper {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 60px;
  align-items: start;
}

/* Sidebar */
.sidebar {
  position: sticky;
  top: 20px;
  background: var(--bg-secondary);
  padding: 24px;
  border-radius: 12px;
  border: 2px solid var(--border-color);
}

.sidebar h3 {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-weight: 600;
}

.sidebar-nav {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sidebar-nav li {
  margin-bottom: 4px;
}

.sidebar-nav a {
  display: block;
  padding: 8px 12px;
  color: var(--text-primary);
  text-decoration: none;
  border-radius: 6px;
  transition: all 0.2s ease;
  font-size: 0.95rem;
}

.sidebar-nav a:hover {
  background: var(--bg-primary);
  color: var(--text-primary);
  padding-left: 16px;
}

.sidebar-nav a.active {
  background: var(--bg-primary);
  font-weight: 600;
  border-left: 3px solid var(--text-primary);
  padding-left: 13px;
}

/* Main Content */
.main-content {
  min-width: 0;
}

/* Content Section */
.content-section {
  margin-bottom: 60px;
  scroll-margin-top: 20px;
}

.content-section h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.content-section h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.content-section p {
  margin-bottom: 20px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.content-section ul {
  margin-bottom: 20px;
  padding-left: 24px;
  color: var(--text-secondary);
}

.content-section ul li {
  margin-bottom: 8px;
  line-height: 1.6;
}

.content-section a {
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 2px solid var(--text-secondary);
  transition: border-color 0.2s ease;
}

.content-section a:hover {
  border-bottom-color: var(--text-primary);
}

/* Topic Cards */
.topic-card {
  display: block;
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
  position: relative;
}

.topic-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
  border-color: var(--text-primary);
}

.topic-card h3 {
  font-size: 1.25rem;
  margin-top: 12px;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.topic-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* Card Logo */
.card-logo {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
}

.card-logo svg {
  width: 100%;
  height: 100%;
}

/* Category Badges */
.category-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.category-badge.javascript {
  background: rgba(240, 219, 79, 0.15);
  color: #b8a83d;
}

[data-theme="dark"] .category-badge.javascript {
  background: rgba(240, 219, 79, 0.2);
  color: var(--js-yellow);
}

.category-badge.react {
  background: rgba(97, 218, 251, 0.15);
  color: #3ba3c4;
}

[data-theme="dark"] .category-badge.react {
  background: rgba(97, 218, 251, 0.2);
  color: var(--react-blue);
}

.category-badge.mern {
  background: rgba(14, 121, 59, 0.15);
  color: #0a5e2f;
}

[data-theme="dark"] .category-badge.mern {
  background: rgba(14, 121, 59, 0.2);
  color: #28a745;
}

.category-badge.native {
  background: rgba(155, 89, 182, 0.15);
  color: #7e4a96;
}

[data-theme="dark"] .category-badge.native {
  background: rgba(155, 89, 182, 0.2);
  color: var(--native-purple);
}

.category-badge.testing {
  background: rgba(153, 66, 91, 0.15);
  color: #99425B;
}

[data-theme="dark"] .category-badge.testing {
  background: rgba(153, 66, 91, 0.2);
  color: #C56782;
}

/* Construction Card */
.construction-card {
  opacity: 0.7;
  cursor: default;
  pointer-events: none;
}

.construction-badge {
  margin-top: 16px;
  padding: 8px 12px;
  background: rgba(255, 193, 7, 0.15);
  border-radius: 6px;
  text-align: center;
}

.construction-badge span {
  color: var(--accent-warning);
  font-weight: 600;
  font-size: 0.9rem;
}

/* Info Boxes */
.info-box,
.warning-box,
.success-box {
  padding: 20px;
  border-radius: 8px;
  margin: 24px 0;
  border-left: 4px solid;
}

.info-box {
  background: rgba(97, 218, 251, 0.1);
  border-left-color: var(--react-blue);
}

.warning-box {
  background: rgba(255, 193, 7, 0.1);
  border-left-color: var(--accent-warning);
}

.success-box {
  background: rgba(40, 167, 69, 0.1);
  border-left-color: var(--accent-success);
}

.info-box p,
.warning-box p,
.success-box p {
  margin-bottom: 0;
  color: var(--text-primary);
}

.info-box strong,
.warning-box strong,
.success-box strong {
  display: block;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.info-box ul,
.warning-box ul,
.success-box ul {
  margin-top: 12px;
  margin-bottom: 0;
}

.info-box ol,
.warning-box ol,
.success-box ol {
  margin-top: 12px;
  margin-bottom: 0;
  padding-left: 20px;
}

/* Responsive */
@media (max-width: 1024px) {
  .content-wrapper {
    grid-template-columns: 220px 1fr;
    gap: 40px;
  }
}

/* Footer */
.footer {
  margin-top: 80px;
  padding: 40px 20px;
  border-top: 2px solid var(--border-color);
  background: var(--bg-primary);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  text-align: center;
}

.footer-divider {
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--js-yellow), var(--react-blue), var(--mongo-green));
  margin: 0 auto 24px;
  border-radius: 2px;
}

.footer-text {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.footer-link {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

.footer-link:hover {
  color: var(--js-yellow);
}

@media (max-width: 768px) {
  .page-title {
    font-size: 2rem;
  }

  .page-description {
    font-size: 1rem;
  }

  .content-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .sidebar {
    position: static;
    margin-bottom: 40px;
  }

  .content-section h2 {
    font-size: 1.5rem;
  }

  .content-section h3 {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 20px 16px;
  }

  .page-header {
    margin-bottom: 40px;
    padding-bottom: 30px;
  }

  .page-title {
    font-size: 1.75rem;
  }

  .theme-toggle {
    width: 45px;
    height: 45px;
    top: 16px;
    right: 16px;
  }
}