/* ai-roadmap.css */

/* --- Roadmap Layout Variables --- */
:root {
    --roadmap-line-color: #333;
    --roadmap-node-bg: #0a0a0a;
    --roadmap-node-border: #00ff41; /* "Cyber Blue" AI feel can be swapped here */
    --roadmap-text-color: #eee;
    --spine-width: 6px;
}

.roadmap-header.centered-header {
    position: relative;
    padding: 60px 20px;
    margin: 80px auto;
    max-width: 900px;
    border: 1px solid rgba(97, 218, 251, 0.1);
    background: radial-gradient(circle at center, rgba(97, 218, 251, 0.05) 0%, transparent 70%);
    /* Creating HUD corners using pseudo-elements */
  }
  
  /* Technical Corner Brackets */
  .roadmap-header::before,
  .roadmap-header::after {
    content: '';
    position: absolute;
    width: 30px;
    height: 30px;
    border: 2px solid var(--react-cyan);
  }
  
  .roadmap-header::before {
    top: 0;
    left: 0;
    border-right: none;
    border-bottom: none;
  }
  
  .roadmap-header::after {
    bottom: 0;
    right: 0;
    border-left: none;
    border-top: none;
  }
  
  /* --- The Glitch Text Effect --- */
  .glitch-text {
    position: relative;
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: 4px;
    color: var(--text-primary);
    text-transform: uppercase;
    margin: 0;
  }
  
  /* Creating the RGB split glitch layers */
  .glitch-text::before,
  .glitch-text::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.8;
  }
  
  .glitch-text::before {
    color: #ff00c1; /* Magenta shift */
    z-index: -1;
    animation: glitch-offset 3s infinite linear alternate-reverse;
  }
  
  .glitch-text::after {
    color: #00fff9; /* Cyan shift */
    z-index: -2;
    animation: glitch-offset 2s infinite linear alternate;
  }
  
  @keyframes glitch-offset {
    0% { transform: translate(0); }
    20% { transform: translate(-2px, 2px); }
    40% { transform: translate(-2px, -2px); }
    60% { transform: translate(2px, 2px); }
    80% { transform: translate(2px, -2px); }
    100% { transform: translate(0); }
  }
  
  /* --- The Subtitle Typing Effect --- */
  .subtitle {
    font-family: 'JetBrains Mono', monospace;
    color: var(--react-cyan);
    font-size: 1.1rem;
    margin-top: 15px;
    display: inline-block;
    overflow: hidden; 
    white-space: nowrap; 
    border-right: 3px solid var(--react-cyan); /* The Cursor */
    width: 0;
    animation: 
      typing-header 3s steps(40, end) forwards,
      blink-caret 0.75s step-end infinite;
  }
  
  @keyframes typing-header {
    from { width: 0 }
    to { width: 100% }
  }
  
  @keyframes blink-caret {
    from, to { border-color: transparent }
    50% { border-color: var(--react-cyan) }
  }
  
  /* --- Light Mode Adjustments --- */
  body.light-mode .roadmap-header {
    background: radial-gradient(circle at center, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    border-color: rgba(59, 130, 246, 0.2);
  }
  
  body.light-mode .glitch-text {
    color: var(--text-primary);
    text-shadow: 2px 2px rgba(59, 130, 246, 0.1);
  }
  
  body.light-mode .subtitle {
    color: var(--react-blue);
    border-right-color: var(--react-blue);
  }
  /* react-road.css - Advanced Flex-Stability & Theme-Aware Version */
  @keyframes spineScanner {
    0% { top: -10%; opacity: 0; }
    50% { opacity: 1; }
    100% { top: 110%; opacity: 0; }
  }
  
  @keyframes magneticPulse {
    0%, 100% { transform: scale(1); box-shadow: 0 0 10px var(--react-cyan); }
    50% { transform: scale(1.3); box-shadow: 0 0 25px var(--react-cyan); }
  }
  @keyframes spineFlow {
    0% { background-position: 0% 0%; }
    100% { background-position: 0% 200%; }
  }
  @keyframes floatCard {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
  }
  :root {
    /* Core Brand Colors */
    --react-cyan: #61dafb;
    --react-blue: #4a90e2;
  
    /* Dark Mode Variables (Default) */
    --bg-main: #0a0a0a;
    --text-primary: #ffffff;
    --text-secondary: #999999;
    --glass: rgba(10, 10, 10, 0.9);
    --node-border: #333333;
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    --spine-color: linear-gradient(
      to bottom,
      transparent,
      var(--react-cyan),
      var(--react-blue),
      transparent
    );
    --accent-glow: 0 0 12px var(--react-cyan);
  }
  body.light-mode {
    /* Soft Azure Shade Background */
    --bg-main: #f0f7ff; 
    
    /* Frosted Glass Cards (Replaces the dark gray) */
    --glass: rgba(255, 255, 255, 0.85); 
    
    /* Text & Border High Contrast */
    --text-primary: #0f172a; /* Deep Slate Navy */
    --text-secondary: #475569;
    --node-border: #bfdbfe; /* Soft Sky Blue */
    
    /* Modern Clean Shadows */
    --card-shadow: 0 10px 30px rgba(148, 163, 184, 0.12);
    
    /* Vibrant Spine Gradient */
    --spine-color: linear-gradient(
      to bottom, 
      transparent, 
      #3b82f6, 
      #60a5fa, 
      transparent
    );
    --accent-glow: 0 4px 15px rgba(59, 130, 246, 0.3);
  }
  
  
  /* Global Styles */
  body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
    font-family: 'JetBrains Mono', monospace;
  }
  
  .centered-header {
    text-align: center;
    margin-top: 100px;
    margin-bottom: 50px;
  }
  
  /* Roadmap Structure */
  .roadmap-wrapper {
    position: relative;
    max-width: 1100px;
    margin: 60px auto;
    padding: 40px 20px;
    min-height: 100vh;
  }
  
  .roadmap-spine {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--spine-color);
    transform: translateX(-50%);
    animation: spineFlow 5s linear infinite;
    z-index: 0;
  }
  /* --- Spine 'Scanner' Light Effect --- */
  .roadmap-spine::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100px;
    background: linear-gradient(to bottom, transparent, #fff, transparent);
    animation: spineScanner 4s linear infinite;
    z-index: 1;
  }
  .roadmap-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 60px;
    width: 100%;
  }
  
  /* Roadmap Nodes */
  .chapter-node {
    position: relative;
    width: 44%;
    background: var(--glass);
    border: 1px solid var(--node-border);
    border-radius: 20px;
    padding: 30px;
    backdrop-filter: blur(10px);
    box-shadow: var(--card-shadow);
    z-index: 1;
    animation: floatCard 6s ease-in-out infinite;
    transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
    color: var(--text-primary);
  }
  
  .chapter-node.left {
    align-self: flex-start;
    text-align: right;
  }
  
  .chapter-node.right {
    align-self: flex-end;
    text-align: left;
  }
  
  .chapter-node:hover {
    /* 1. Enhanced Lift and Scale */
    transform: translateY(-12px) scale(1.03); 
    
    /* 2. Stronger Border visibility for Light Mode */
    border-color: var(--react-blue); 
    
    /* 3. Deep Ambient Shadow for Elevation */
    box-shadow: 
      0 20px 25px -5px rgba(0, 0, 0, 0.1), 
      0 10px 10px -5px rgba(0, 0, 0, 0.04),
      0 0 20px rgba(59, 130, 246, 0.1); /* Subtle blue tint to the shadow */
      
    /* 4. Increase focus */
    background: rgba(88, 171, 240, 0.1); 
    color: #0f172a;
    z-index: 10;
    
    /* 5. Smooth Transition (Ensures this matches your base class) */
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  }
  
  
  
  /* Connectivity Indicators */
  .chapter-node::after {
    content: '';
    position: absolute;
    top: 35px;
    width: 16px;
    height: 16px;
    background: var(--react-cyan);
    border-radius: 50%;
    box-shadow: var(--accent-glow);
    animation: magneticPulse 3s infinite ease-in-out;
  }
  /* Ensure the connecting dot also reacts to the hover */
  .chapter-node:hover::after {
    background: var(--react-blue);
    transform: scale(1.3);
    box-shadow: 0 0 15px var(--react-blue);
  }
  .chapter-node.left::after {
    right: -13.5%;
  }
  
  .chapter-node.right::after {
    left: -13.5%;
  }
  
  /* Node Elements */
  .node-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
  }
  
  .chapter-node.left .node-header {
    flex-direction: row-reverse;
  }
  
  .node-header h3 {
    color: var(--react-cyan);
    font-size: 1.2rem;
    margin: 0;
  }
  
  .toggle-btn {
    background: rgba(97, 218, 251, 0.1);
    border: 1px solid var(--react-cyan);
    color: var(--react-cyan);
    width: 35px;
    height: 35px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.3s;
  }
  
  .toggle-btn.active {
    background: var(--react-cyan);
    color: #000;
    transform: rotate(45deg);
  }
  
  
  /* Details and Links */
  .chapter-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s;
    opacity: 0;
  }
  
  .chapter-details.open {
    max-height: 1000px;
    opacity: 1;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--node-border);
  }
  
  .module-link {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 12px;
    margin: 8px 0;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    transition: 0.3s;
  }
  /* --- Enhanced h4 Design for Skill Nodes --- */
  .skill-node h4 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    font-weight: 700;
    margin: 15px 0 5px 0;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    display: inline-block; /* Required for the underline effect */
    transition: color 0.3s ease;
  }
  
  /* The Animated Underline */
  .skill-node h4::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0; /* Start hidden */
    height: 2px;
    background: var(--react-cyan);
    transition: width 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 0 8px var(--react-cyan);
  }
  
  /* --- Hover Effects --- */
  .skill-node:hover h4 {
    color: var(--react-cyan);
    text-shadow: 0 0 10px rgba(97, 218, 251, 0.5);
  }
  
  .skill-node:hover h4::after {
    width: 100%; /* Slide underline out */
  }
  
  /* Light Mode Specific Adjustment */
  body.light-mode .skill-node h4::after {
    background: var(--react-blue);
    box-shadow: 0 2px 4px rgba(97, 218, 251, 0.5);
  }
  
  body.light-mode .skill-node:hover h4 {
    color: var(--react-blue);
  }
  body.light-mode .module-link {
    background: rgba(97, 218, 251, 0.5);
  }
  
  .module-link:hover {
    color: var(--text-primary);
    background: rgba(97, 218, 251, 0.2);
    padding-left: 20px;
  }
  /* --- Final Visibility Fix for h2 --- */
  h2 {
    /* DARK MODE (Default) */
    /* We use var(--react-cyan) or #ffffff to ensure it is bright */
    color: #61dafb !important; 
    
    /* FIX: Changed from 0.04 opacity to solid cyan */
    text-decoration-color: #61dafb !important;
    text-underline-offset: 12px;
    
    /* Increased shadow spread for a stronger glow effect */
    text-shadow: 0 0 15px rgba(97, 218, 251, 0.6);
    
    font-family: 'JetBrains Mono', monospace;
    text-transform: uppercase;
    letter-spacing: 4px;
    margin: 80px 0 40px 0;
    transition: all 0.3s ease;
  }
  
  /* LIGHT MODE ADJUSTMENT */
  body.light-mode h2 {
    /* High contrast Navy for light backgrounds */
    color: #0f172a !important; 
    
    /* Strong blue underline for visibility */
    text-decoration-color: #3b82f6 !important;
    
    /* Remove glow in light mode to keep text crisp */
    text-shadow: none;
  }
  
  /* Explore-Other-Courses Fixes */
  #other-courses {
    margin-top: 70px;
    margin-bottom: 20px;
    padding: 40px 10px;
    background: var(--glass);
    border: 2px solid var(--react-blue);
    border-radius: 15px;
    box-shadow: var(--card-shadow);
  }
  
  #other-courses h2 {
    text-align: center;
    color: var(--text-primary);
    text-decoration: underline;
    text-decoration-thickness: 1px;
  }
  
  .skill-node h4 {
    color: var(--text-primary);
  }
  
  /* Navbar Theme Correction */
  #navbar-placeholder a {
    color: var(--text-primary) !important;
    transition: color 0.2s ease;
  }
  
  #navbar-placeholder a:hover {
    color: var(--react-cyan) !important;
  }
  
  /* Responsive Design */
  @media (max-width: 768px) {
    .roadmap-spine {
      left: 20px;
    }
    .chapter-node {
      width: 85%;
      align-self: flex-end;
      text-align: left;
    }
    .chapter-node.left .node-header {
      flex-direction: row;
    }
    .chapter-node.left::after,
    .chapter-node.right::after {
      left: -34px;
    }
}

/* =========================================
   FIX: Explore Other Courses Layout
   ========================================= */

.skill-path-wrapper {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  padding: 20px;
}

.skill-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 180px;
  padding: 20px;
  background: var(--roadmap-node-bg); /* Use existing BG var */
  border: 1px solid #333;
  border-radius: 12px;
  text-decoration: none;
  transition: all 0.3s ease;
  backdrop-filter: blur(5px);
}

.skill-node:hover {
  transform: translateY(-5px);
  border-color: var(--roadmap-node-border); /* Use green theme color */
  box-shadow: 0 8px 20px rgba(0, 255, 65, 0.15);
}

.node-icon {
  font-size: 2.5rem;
  color: #888;
  margin-bottom: 12px;
  transition: color 0.3s ease;
}

.skill-node:hover .node-icon {
  color: var(--roadmap-node-border); /* Use green theme color */
}

.skill-node h4 {
  color: #fff;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  margin: 8px 0;
  text-align: center;
}

.node-level {
  font-size: 0.75rem;
  color: #888;
  font-family: 'JetBrains Mono', monospace;
  background: rgba(255, 255, 255, 0.05);
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}