/* ============================================
   Odin Lernboard - Stylesheet
   Reines CSS für statische HTML-Seiten
   ============================================ */

/* ============================================
   CSS Reset & Basis-Styles
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Farbschema: Dunkles Design mit Dunkelblau */
  --color-bg-primary: #0a0e1a;
  --color-bg-secondary: #121829;
  --color-bg-card: #1a2234;
  --color-accent: #3b82f6;
  --color-accent-hover: #2563eb;
  --color-text-primary: #e5e7eb;
  --color-text-secondary: #9ca3af;
  --color-border: #2d3748;

  /* Schriftarten */
  --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;

  /* Abstände */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Transitions */
  --transition: all 0.3s ease;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ============================================
   Header & Navigation
   ============================================ */
.main-header {
  background-color: var(--color-bg-secondary);
  border-bottom: 2px solid var(--color-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

/* Logo-Bereich */
.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 50px;
  width: auto;
  /* Fallback für fehlendes Logo */
  background-color: var(--color-bg-card);
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
}

/* Navigation */
.main-nav {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.nav-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  font-weight: 500;
}

.nav-link:hover {
  color: var(--color-accent);
  background-color: var(--color-bg-card);
}

.nav-link.active {
  color: var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
}

/* ============================================
   Hero-Bereich (Startseite)
   ============================================ */
.hero {
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-card) 100%);
  padding: var(--spacing-xl) 0;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto var(--spacing-lg);
  line-height: 1.8;
}

.cta-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  font-size: 1rem;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn-secondary:hover {
  background-color: var(--color-accent);
  color: white;
}

.btn-download {
  background-color: var(--color-accent);
  color: white;
  width: 100%;
  text-align: center;
}

.btn-download:hover {
  background-color: var(--color-accent-hover);
}

/* ============================================
   Sections
   ============================================ */
.info-section,
.learning-section,
.components-section,
.wiki-content,
.downloads-section,
.toc-section,
.info-box-section {
  padding: var(--spacing-xl) 0;
}

.page-header {
  padding: var(--spacing-lg) 0;
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.page-header h1 {
  font-size: 2.2rem;
  margin-bottom: var(--spacing-sm);
}

.page-header p {
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

h2 {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

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

/* ============================================
   Learning Grid (Startseite)
   ============================================ */
.learning-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.learning-card {
  background-color: var(--color-bg-card);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.learning-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  border-color: var(--color-accent);
}

.learning-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   Board-Komponenten Grid
   ============================================ */
.components-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.component-card {
  background-color: var(--color-bg-card);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.component-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.component-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.component-description {
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.component-example {
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-accent);
  margin-top: var(--spacing-sm);
}

.component-example strong {
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--spacing-xs);
}

.component-example p {
  margin: 0;
  font-size: 0.95rem;
}

/* Neue Komponenten-Karten können nach diesem Muster hinzugefügt werden */

/* ============================================
   Board-Image Section
   ============================================ */
.board-image-section {
  padding: var(--spacing-lg) 0;
  background-color: var(--color-bg-secondary);
}

.board-image-placeholder {
  background-color: var(--color-bg-card);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  position: relative;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.board-image-placeholder img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  display: none; /* Wird angezeigt, wenn echtes Bild vorhanden */
}

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

/* Wenn ein echtes Bild vorhanden ist, Platzhalter-Text ausblenden */
.board-image-placeholder img[src]:not([src=""]) {
  display: block;
}

.board-image-placeholder img[src]:not([src=""]) ~ .placeholder-text {
  display: none;
}

/* ============================================
   Wiki-Inhaltsverzeichnis
   ============================================ */
.toc-box {
  background-color: var(--color-bg-card);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  max-width: 800px;
  margin: 0 auto;
}

.toc-box h2 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.toc-list {
  list-style: none;
}

.toc-list li {
  margin-bottom: var(--spacing-sm);
}

.toc-list a {
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: var(--spacing-xs) var(--spacing-sm);
  display: block;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  border-left: 3px solid transparent;
}

.toc-list a:hover {
  color: var(--color-accent);
  background-color: var(--color-bg-secondary);
  border-left-color: var(--color-accent);
  padding-left: var(--spacing-md);
}

/* ============================================
   Wiki-Artikel
   ============================================ */
.wiki-article {
  background-color: var(--color-bg-card);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  margin-bottom: var(--spacing-lg);
  scroll-margin-top: 100px; /* Für Anker-Links */
}

.wiki-article h2 {
  color: var(--color-accent);
  border-bottom: 2px solid var(--color-border);
  padding-bottom: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.wiki-article h3 {
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.wiki-article ol,
.wiki-article ul {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
}

.wiki-article li {
  margin-bottom: var(--spacing-xs);
  line-height: 1.8;
}

.wiki-article li strong {
  color: var(--color-text-primary);
}

/* Code-Blöcke */
.wiki-article pre {
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: var(--spacing-md) 0;
  border: 1px solid var(--color-border);
}

.wiki-article code {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  color: #a5d6ff;
}

/* Neue Wiki-Abschnitte können nach diesem Muster hinzugefügt werden */

/* ============================================
   Downloads Grid
   ============================================ */
.downloads-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.download-card {
  background-color: var(--color-bg-card);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.download-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.download-icon {
  font-size: 3rem;
  text-align: center;
  margin-bottom: var(--spacing-sm);
}

.download-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
  text-align: center;
}

.download-description {
  flex: 1;
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.download-size {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  text-align: center;
  margin-bottom: var(--spacing-md);
  font-style: italic;
}

/* Neue Download-Karten können nach diesem Muster hinzugefügt werden */

/* ============================================
   Info-Box
   ============================================ */
.info-box {
  background-color: var(--color-bg-card);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-accent);
  max-width: 800px;
  margin: 0 auto;
}

.info-box h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.info-box p {
  margin-bottom: var(--spacing-sm);
  line-height: 1.8;
}

/* ============================================
   Footer
   ============================================ */
.main-footer {
  background-color: var(--color-bg-secondary);
  border-top: 2px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  text-align: center;
  margin-top: auto;
}

.main-footer p {
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-secondary);
}

.footer-link {
  color: var(--color-accent);
  text-decoration: none;
  transition: var(--transition);
}

.footer-link:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

.footer-note {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-top: var(--spacing-sm);
}

/* ============================================
   Responsive Design
   ============================================ */

/* Tablets */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

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

  .header-content {
    flex-direction: column;
    text-align: center;
  }

  .main-nav {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

  .learning-grid,
  .components-grid,
  .downloads-grid {
    grid-template-columns: 1fr;
  }

  h2 {
    font-size: 1.7rem;
  }
}

/* Mobile */
@media (max-width: 480px) {
  :root {
    --spacing-xl: 2rem;
    --spacing-lg: 1.5rem;
  }

  .hero h1 {
    font-size: 1.7rem;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .cta-buttons {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
    text-align: center;
  }

  .main-nav {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .nav-link {
    width: 100%;
    text-align: center;
  }

  h2 {
    font-size: 1.5rem;
  }

  .wiki-article pre {
    font-size: 0.8rem;
    padding: var(--spacing-sm);
  }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center {
  text-align: center;
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}