/**
 * Learn Section Styles
 * Technical/Terminal-inspired design for tutorials and how-to guides
 */

/* ============================================
   CSS Variables for Learn Section
   ============================================ */
:root {
  --learn-terminal-bg: #0d1117;
  --learn-terminal-header: #161b22;
  --learn-terminal-border: #30363d;
  --learn-terminal-text: #c9d1d9;
  --learn-terminal-green: #3fb950;
  --learn-terminal-yellow: #d29922;
  --learn-terminal-red: #f85149;
  --learn-terminal-blue: #58a6ff;
  --learn-terminal-purple: #bc8cff;
  --learn-terminal-cyan: #39c5cf;
  --learn-code-font: 'Fira Code', 'JetBrains Mono', 'Consolas', monospace;
  --learn-accent: var(--learn-terminal-cyan);
}

/* Dark mode adjustments */
[data-mode="night"] {
  --learn-terminal-bg: #0a0c10;
  --learn-terminal-header: #0d1117;
}

/* ============================================
   Learn Hero Section
   ============================================ */
.learn-hero {
  background: linear-gradient(135deg, var(--learn-terminal-bg) 0%, #1a1f2e 100%);
  padding: 140px 0 60px;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--learn-terminal-border);
}

.learn-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 20% 80%, rgba(57, 197, 207, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(99, 102, 241, 0.06) 0%, transparent 50%);
  pointer-events: none;
}

/* Grid pattern overlay */
.learn-hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(rgba(57, 197, 207, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 197, 207, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
}

.learn-hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
}

.learn-hero .breadcrumb {
  margin-bottom: 1.5rem;
  color: var(--learn-terminal-text);
  font-size: 0.9rem;
  font-family: var(--learn-code-font);
  opacity: 0.7;
}

.learn-hero .breadcrumb::before {
  content: '$ ';
  color: var(--learn-terminal-green);
}

.learn-hero .breadcrumb a {
  color: var(--learn-terminal-blue);
  text-decoration: none;
  transition: color 0.2s;
}

.learn-hero .breadcrumb a:hover {
  color: var(--learn-terminal-cyan);
  text-decoration: underline;
}

/* Hero badges */
.learn-hero-badge {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.tutorial-type {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.9rem;
  background: rgba(57, 197, 207, 0.15);
  border: 1px solid var(--learn-terminal-cyan);
  color: var(--learn-terminal-cyan);
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--learn-code-font);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.difficulty {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.9rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--learn-code-font);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.difficulty-beginner {
  background: rgba(63, 185, 80, 0.15);
  border: 1px solid var(--learn-terminal-green);
  color: var(--learn-terminal-green);
}

.difficulty-intermediate {
  background: rgba(210, 153, 34, 0.15);
  border: 1px solid var(--learn-terminal-yellow);
  color: var(--learn-terminal-yellow);
}

.difficulty-advanced {
  background: rgba(248, 81, 73, 0.15);
  border: 1px solid var(--learn-terminal-red);
  color: var(--learn-terminal-red);
}

.read-time {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.9rem;
  background: rgba(201, 209, 217, 0.1);
  border: 1px solid var(--learn-terminal-border);
  color: var(--learn-terminal-text);
  border-radius: 4px;
  font-size: 0.75rem;
  font-family: var(--learn-code-font);
}

/* Learn title */
.learn-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  margin-bottom: 1rem;
  color: #fff;
  line-height: 1.2;
  font-family: 'Space Grotesk', sans-serif;
}

.learn-subtitle {
  font-size: 1.1rem;
  color: var(--learn-terminal-text);
  max-width: 700px;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  opacity: 0.9;
}

/* Learn meta */
.learn-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 1rem;
  font-family: var(--learn-code-font);
  font-size: 0.85rem;
}

.learn-date,
.learn-author {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--learn-terminal-text);
  opacity: 0.8;
}

.learn-date svg,
.learn-author svg {
  opacity: 0.6;
}

/* Learn tags */
.learn-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.learn-tag {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  background: var(--learn-terminal-header);
  border: 1px solid var(--learn-terminal-border);
  color: var(--learn-terminal-text);
  border-radius: 3px;
  font-size: 0.7rem;
  font-family: var(--learn-code-font);
  opacity: 0.8;
}

.learn-tag::before {
  content: '#';
  color: var(--learn-terminal-purple);
  margin-right: 2px;
}

/* Terminal decoration in hero */
.learn-hero-terminal {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 100%;
  height: 40px;
  background: var(--learn-terminal-header);
  border-top: 1px solid var(--learn-terminal-border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 12px;
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.terminal-dots .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-dots .dot.red { background: var(--learn-terminal-red); }
.terminal-dots .dot.yellow { background: var(--learn-terminal-yellow); }
.terminal-dots .dot.green { background: var(--learn-terminal-green); }

.terminal-title {
  font-family: var(--learn-code-font);
  font-size: 0.8rem;
  color: var(--learn-terminal-text);
  opacity: 0.6;
}

/* ============================================
   Learn Content Area
   ============================================ */
.learn-post {
  padding: 60px 0 80px;
  background: var(--bg-primary);
}

.learn-content-wrapper {
  max-width: 900px;
  margin: 0 auto;
}

.learn-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 3rem;
  margin-bottom: 2rem;
  line-height: 1.8;
  font-size: 1.05rem;
}

/* Headings */
.learn-content h1,
.learn-content h2,
.learn-content h3,
.learn-content h4 {
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.3;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  font-family: 'Space Grotesk', sans-serif;
}

.learn-content h2 {
  font-size: 1.6rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--learn-terminal-cyan);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.learn-content h2::before {
  content: '##';
  color: var(--learn-terminal-cyan);
  font-family: var(--learn-code-font);
  font-size: 0.9em;
  opacity: 0.6;
}

.learn-content h3 {
  font-size: 1.3rem;
  color: var(--learn-terminal-blue);
}

.learn-content h3::before {
  content: '###';
  margin-right: 0.5rem;
  font-family: var(--learn-code-font);
  font-size: 0.85em;
  opacity: 0.5;
}

/* Paragraphs */
.learn-content p {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
}

/* Lists */
.learn-content ul,
.learn-content ol {
  margin: 1.5rem 0;
  padding-left: 1.5rem;
}

.learn-content li {
  margin-bottom: 0.6rem;
  color: var(--text-secondary);
  position: relative;
}

.learn-content ul li::marker {
  color: var(--learn-terminal-cyan);
}

.learn-content ol li::marker {
  color: var(--learn-terminal-green);
  font-family: var(--learn-code-font);
  font-weight: 600;
}

/* Links */
.learn-content a {
  color: var(--learn-terminal-blue);
  text-decoration: none;
  border-bottom: 1px dashed var(--learn-terminal-blue);
  transition: all 0.2s;
}

.learn-content a:hover {
  color: var(--learn-terminal-cyan);
  border-bottom-color: var(--learn-terminal-cyan);
  border-bottom-style: solid;
}

/* Inline code */
.learn-content code {
  background: var(--learn-terminal-header);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-family: var(--learn-code-font);
  font-size: 0.88em;
  color: var(--learn-terminal-cyan);
  border: 1px solid var(--learn-terminal-border);
}

/* Code blocks */
.learn-content pre {
  background: var(--learn-terminal-bg);
  border: 1px solid var(--learn-terminal-border);
  border-radius: 8px;
  padding: 0;
  overflow: hidden;
  margin: 1.5rem 0;
  position: relative;
}

.learn-content pre::before {
  content: '';
  display: block;
  height: 32px;
  background: var(--learn-terminal-header);
  border-bottom: 1px solid var(--learn-terminal-border);
  position: relative;
}

.learn-content pre::after {
  content: '';
  position: absolute;
  top: 10px;
  left: 12px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--learn-terminal-red);
  box-shadow: 
    18px 0 0 var(--learn-terminal-yellow),
    36px 0 0 var(--learn-terminal-green);
}

.learn-content pre code {
  display: block;
  padding: 1.25rem;
  overflow-x: auto;
  background: transparent;
  border: none;
  color: var(--learn-terminal-text);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Blockquotes - styled as notes/tips */
.learn-content blockquote {
  background: rgba(57, 197, 207, 0.08);
  border-left: 4px solid var(--learn-terminal-cyan);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  border-radius: 0 8px 8px 0;
  position: relative;
}

.learn-content blockquote::before {
  content: '💡 Note:';
  display: block;
  font-weight: 600;
  color: var(--learn-terminal-cyan);
  margin-bottom: 0.5rem;
  font-family: var(--learn-code-font);
  font-size: 0.85rem;
}

.learn-content blockquote p {
  margin-bottom: 0;
  color: var(--text-secondary);
  font-style: normal;
}

/* Strong/Bold - highlighted */
.learn-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Horizontal rules */
.learn-content hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--learn-terminal-border), transparent);
  margin: 2.5rem 0;
}

/* Tables */
.learn-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.learn-content th,
.learn-content td {
  padding: 0.75rem 1rem;
  text-align: left;
  border: 1px solid var(--learn-terminal-border);
}

.learn-content th {
  background: var(--learn-terminal-header);
  color: var(--learn-terminal-cyan);
  font-family: var(--learn-code-font);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.learn-content td {
  background: var(--bg-card);
  color: var(--text-secondary);
}

.learn-content tr:hover td {
  background: rgba(57, 197, 207, 0.05);
}

/* ============================================
   Table of Contents Sidebar
   ============================================ */
.toc-sidebar {
  position: fixed;
  top: 120px;
  right: 20px;
  width: 220px;
  max-height: calc(100vh - 160px);
  overflow-y: auto;
  z-index: 100;
  display: none;
}

@media (min-width: 1400px) {
  .toc-sidebar {
    display: block;
  }
}

.toc-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
}

.toc-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

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

.toc-list li {
  margin-bottom: 0.25rem;
}

.toc-list a {
  display: block;
  padding: 0.35rem 0.5rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 4px;
  transition: all 0.2s;
  border-left: 2px solid transparent;
}

.toc-list a:hover {
  color: var(--learn-terminal-cyan);
  background: rgba(57, 197, 207, 0.08);
  border-left-color: var(--learn-terminal-cyan);
}

.toc-list a.active {
  color: var(--learn-terminal-cyan);
  background: rgba(57, 197, 207, 0.1);
  border-left-color: var(--learn-terminal-cyan);
}

/* ============================================
   Learn Footer
   ============================================ */
.learn-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.learn-footer .btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

/* ============================================
   Learn Index Page
   ============================================ */
.learn-section {
  padding: 80px 0;
  background: var(--bg-primary);
}

.learn-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

/* Tutorial Card */
.tutorial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
  position: relative;
}

.tutorial-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
  border-color: var(--learn-terminal-cyan);
}

/* Terminal header on card */
.tutorial-card-header {
  background: var(--learn-terminal-header);
  border-bottom: 1px solid var(--learn-terminal-border);
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.tutorial-card-header .dots {
  display: flex;
  gap: 5px;
}

.tutorial-card-header .dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.tutorial-card-header .dots span:nth-child(1) { background: var(--learn-terminal-red); }
.tutorial-card-header .dots span:nth-child(2) { background: var(--learn-terminal-yellow); }
.tutorial-card-header .dots span:nth-child(3) { background: var(--learn-terminal-green); }

.tutorial-card-header .path {
  font-family: var(--learn-code-font);
  font-size: 0.75rem;
  color: var(--learn-terminal-text);
  opacity: 0.6;
  margin-left: auto;
}

/* Card content */
.tutorial-card-content {
  padding: 1.5rem;
}

.tutorial-card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tutorial-card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.tutorial-card-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.2s;
}

.tutorial-card-title a:hover {
  color: var(--learn-terminal-cyan);
}

.tutorial-card-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}

.tutorial-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.tutorial-card-date {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-family: var(--learn-code-font);
}

.tutorial-card-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--learn-terminal-cyan);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: gap 0.2s;
}

.tutorial-card-link:hover {
  gap: 0.6rem;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
  .learn-hero {
    padding: 120px 0 50px;
  }
  
  .learn-hero-terminal {
    height: 32px;
    padding: 0 12px;
  }
  
  .terminal-dots .dot {
    width: 10px;
    height: 10px;
  }
  
  .learn-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .learn-content {
    padding: 2rem 1.5rem;
  }
  
  .learn-content h2::before,
  .learn-content h3::before {
    display: none;
  }
  
  .learn-footer {
    flex-direction: column;
  }
  
  .learn-footer .btn {
    width: 100%;
    justify-content: center;
  }
  
  .learn-content pre::before {
    height: 28px;
  }
  
  .learn-content pre::after {
    top: 8px;
    width: 10px;
    height: 10px;
    box-shadow: 
      15px 0 0 var(--learn-terminal-yellow),
      30px 0 0 var(--learn-terminal-green);
  }
}

/* ============================================
   Copy Button for Code Blocks
   ============================================ */
.code-block-wrapper {
  position: relative;
}

.copy-btn {
  position: absolute;
  top: 6px;
  right: 10px;
  background: var(--learn-terminal-header);
  border: 1px solid var(--learn-terminal-border);
  color: var(--learn-terminal-text);
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-family: var(--learn-code-font);
  cursor: pointer;
  opacity: 0.7;
  transition: all 0.2s;
  z-index: 10;
}

.copy-btn:hover {
  opacity: 1;
  background: var(--learn-terminal-cyan);
  color: var(--learn-terminal-bg);
}

.copy-btn.copied {
  background: var(--learn-terminal-green);
  color: var(--learn-terminal-bg);
}