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

:root {
    /* Primary Colors */
    --primary-green: #00ff88;
    --secondary-green: #00cc6a;
    
    /* Background Colors */
    --dark-bg: #0a0a0a;
    --darker-bg: #050505;
    --card-bg: #111111;
    --card-hover: #1a1a1a;
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #707070;
    
    /* Semantic Colors */
    --danger: #ff3366;
    --warning: #ffaa00;
    --info: #00a8ff;
    --purple: #aa55ff;
    --pink: #ff55aa;
    
    /* UI Colors */
    --border-color: #222;
    --locked: #333333;
    
    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-medium: 0.5s ease;
    --transition-slow: 0.6s ease;
}

/* ========================================
   Base Styles
   ======================================== */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(180deg, var(--dark-bg) 0%, var(--darker-bg) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ========================================
   Animations
   ======================================== */
@keyframes pulse {
    0%, 75% { transform: scale(1); }
    87.5% { transform: scale(1.0125); }
    100% { transform: scale(1); }
}

@keyframes slideIn {
    from { 
        opacity: 0; 
        transform: translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

@keyframes fadeInSmooth {
    from { 
        opacity: 0; 
        transform: translateX(-50%) translateY(5px);
    }
    to { 
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* ========================================
   Layout Components
   ======================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* ========================================
   Header Section
   ======================================== */
.header {
    text-align: center;
    margin-bottom: 3rem;
    animation: slideIn var(--transition-slow);
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary), var(--primary-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.terminal-line {
    font-family: 'Courier New', monospace;
    color: var(--primary-green);
    font-size: 1rem;
    margin-bottom: 1rem;
    opacity: 0.8;
}

.terminal-line::before {
    content: "> ";
    animation: pulse 2s infinite;
}

/* ========================================
   Stats Bar
   ======================================== */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
    animation: slideIn 0.7s ease;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-green);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ========================================
   Quiz Section
   ======================================== */
.quiz-section {
    background: var(--card-bg);
    border: 2px solid var(--primary-green);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 3rem;
    animation: slideIn 0.7s ease;
}

.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.quiz-title {
    font-size: 1.5rem;
    color: var(--primary-green);
}

.quiz-progress {
    display: flex;
    gap: 0.5rem;
}

.progress-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-color);
    transition: all var(--transition-fast);
}

.progress-dot.active {
    background: var(--primary-green);
    box-shadow: 0 0 10px var(--primary-green);
}

.quiz-content {
    text-align: center;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.quiz-question {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.quiz-options {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.quiz-option {
    padding: 1rem 2rem;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1rem;
    min-width: 150px;
    color: var(--text-primary);
}

.quiz-option:hover {
    border-color: var(--primary-green);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 255, 136, 0.2);
}

.quiz-option.selected {
    background: linear-gradient(135deg, var(--primary-green), var(--secondary-green));
    color: #000;
    border-color: var(--primary-green);
    font-weight: bold;
}

/* Quiz Result */
.quiz-result {
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.1), rgba(0, 204, 106, 0.1));
    border: 1px solid var(--primary-green);
    border-radius: 8px;
    padding: 1.5rem;
    margin-top: 2rem;
    display: none;
}

.quiz-result.show {
    display: block;
    animation: slideIn var(--transition-medium);
}

.result-title {
    font-size: 1.2rem;
    color: var(--primary-green);
    margin-bottom: 1rem;
}

.result-path {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.path-item {
    background: var(--card-bg);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    border: 1px solid var(--primary-green);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.path-item:hover {
    background: linear-gradient(135deg, var(--primary-green), var(--secondary-green));
    color: #000 !important;
    box-shadow: 0 4px 12px rgba(0, 255, 136, 0.4);
    border-color: var(--secondary-green);
}

.path-arrow {
    color: var(--primary-green);
}

.result-stats {
    display: flex;
    gap: 2rem;
    margin-top: 1rem;
}

.result-stat {
    flex: 1;
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    color: var(--primary-green);
    font-weight: bold;
}

.quiz-result-hint {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: left;
}

.highlight-purple {
    color: var(--purple);
}

.quiz-reset-btn {
    margin-top: 1.5rem;
    padding: 0.75rem 1.5rem;
    background: transparent;
    border: 1px solid var(--primary-green);
    border-radius: 4px;
    color: var(--primary-green);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.quiz-reset-btn:hover {
    background: rgba(0, 255, 136, 0.1);
}

/* ========================================
   Journey Map
   ======================================== */
.journey-map {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 3rem;
    position: relative;
    overflow: visible;
}

/* Search Bar */
.search-container {
    margin-bottom: 1.5rem;
    position: relative;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

#courseSearch {
    padding: 0.85rem 3rem 0.85rem 1.5rem;
    background: var(--card-bg);
    border: 1px solid transparent;
    border-radius: 8px;
    color: var(--text-primary);
    width: 100%;
    font-size: 1rem;
    box-shadow: 0 0 15px rgba(0, 255, 136, 0.1);
    transition: all var(--transition-fast);
}

#courseSearch:hover {
    border-color: rgba(0, 255, 136, 0.5) !important;
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.15);
}

#courseSearch:focus {
    outline: none;
    border-color: var(--primary-green) !important;
    box-shadow: 0 0 25px rgba(0, 255, 136, 0.2);
}

#clearSearchBtn {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 5px;
    display: none;
    transition: all var(--transition-fast);
}

#clearSearchBtn:hover {
    color: var(--primary-green);
    transform: translateY(-50%) scale(1.2);
}

/* Map Controls */
.map-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.control-btn {
    padding: 0.75rem 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.control-btn:hover {
    border-color: var(--primary-green);
    color: var(--primary-green);
}

.control-btn.active {
    background: linear-gradient(135deg, var(--primary-green), var(--secondary-green));
    color: #000;
    border-color: var(--primary-green);
    font-weight: bold;
}

/* Map Container */
.map-container {
    position: relative;
    min-height: 1000px;
    width: 100%;
    overflow: visible;
}

/* Course Grid */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    padding: 2rem;
    overflow: visible;
}

.course-level {
    margin-bottom: 3rem;
    overflow: visible;
}

.level-title {
    font-size: 1.2rem;
    color: var(--primary-green);
    margin-bottom: 1.5rem;
    padding-left: 1rem;
    border-left: 3px solid var(--primary-green);
}

/* ========================================
   Course Nodes
   ======================================== */
.course-node {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    transition: all var(--transition-fast);
    position: relative;
    overflow: visible;
    display: flex;
    flex-direction: column;
    min-height: 180px;
}

/* Course Node States */
.course-node.in-path {
    border-color: var(--primary-green);
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.3);
    animation: pulse 4s infinite;
    opacity: 1;
}

.course-node.optional {
    border-color: var(--purple);
    box-shadow: 0 0 20px rgba(170, 85, 255, 0.3);
    opacity: 1;
}

.course-node.all-map {
    border-color: var(--primary-green);
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.3);
    opacity: 1;
}

.course-node.next-step {
    border-color: var(--warning);
    box-shadow: 0 0 20px rgba(255, 170, 0, 0.3);
    opacity: 1;
}

.course-node.available {
    opacity: 0.6;
    border-color: var(--border-color);
}

.course-node.available:hover {
    opacity: 1;
    border-color: var(--text-secondary);
}

.course-node.completed {
    border-color: rgba(0, 204, 106, 0.6);
    background: rgba(0, 204, 106, 0.02);
    opacity: 0.7;
    box-shadow: 0 0 10px rgba(0, 204, 106, 0.15);
}

.course-node.completed::after {
    content: "✔";
    position: absolute;
    top: 0.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 24px;
    background: rgba(0, 204, 106, 0.7);
    color: rgba(0, 0, 0, 0.8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 14px;
}

.course-node.completed:hover {
    border-color: rgba(0, 204, 106, 0.8);
    opacity: 0.85;
}

.course-node.locked {
    opacity: 0.4;
    border-color: var(--locked);
}

.course-node.locked:hover {
    opacity: 0.5;
}

.course-node:not(.locked):hover {
    box-shadow: 0 10px 30px rgba(0, 255, 136, 0.3);
}

.course-node.optional:hover {
    border-color: var(--purple);
    box-shadow: 0 10px 30px rgba(170, 85, 255, 0.4);
}

/* Course Node Content */
.node-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.node-icon {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 1.2rem;
}

.node-category {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.node-title {
    font-size: 0.95rem;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: auto;
    padding-bottom: 0.5rem;
    min-height: 2.5rem;
}

.node-duration {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.node-prereq {
    font-size: 0.75rem;
    color: var(--danger);
    margin-bottom: 0.5rem;
    display: block;
}

.course-node.in-path .node-prereq {
    color: var(--secondary-green);
}

.course-node.completed .node-prereq {
    color: rgba(0, 204, 106, 0.7);
}

/* Course Badge */
.course-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.course-badge.coming-soon {
    background: linear-gradient(135deg, var(--danger), #ff1744);
    color: #fff;
    box-shadow: 0 2px 8px rgba(255, 51, 102, 0.3);
}

/* Node Actions */
.node-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: auto;
    padding-top: 0.5rem;
}

.node-btn {
    flex: 1;
    padding: 0.4rem;
    font-size: 0.75rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    text-align: center;
}

.node-btn.primary {
    background: linear-gradient(135deg, var(--primary-green), var(--secondary-green));
    color: #000;
    font-weight: bold;
}

.node-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 255, 136, 0.4);
}

.node-btn.secondary {
    background: transparent;
    border: 1px solid var(--primary-green);
    color: var(--primary-green);
}

.node-btn.secondary:hover {
    background: rgba(0, 255, 136, 0.1);
    transform: translateY(-1px);
}

.course-node.locked .node-btn {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ========================================
   Quick View Tooltips
   ======================================== */
.quick-view {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: 280px;
    padding: 1rem;
    background: var(--card-bg);
    border: 1px solid var(--info);
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 168, 255, 0.3);
    display: none;
    z-index: 100;
    margin-bottom: 10px;
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
}

/* Universal Quick View Hover */
.course-node:hover {
    z-index: 10;
}

.course-node:hover .quick-view {
    display: block !important;
    opacity: 1;
    transition-delay: 0.05s;
    animation: fadeInSmooth 0.3s ease;
    pointer-events: auto;
}

/* ========================================
   Legend
   ======================================== */
.legend {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 3rem;
}

.legend-title {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.legend-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#legend-completed {
    display: none;
}

.legend-item span {
    color: var(--text-secondary);
}

.legend-icon {
    width: 30px;
    height: 20px;
    border: 2px solid;
    border-radius: 4px;
    position: relative;
}

.legend-icon.completed-icon {
    border-color: rgba(0, 204, 106, 0.6);
    background: rgba(0, 204, 106, 0.02);
}

.legend-icon.completed-icon::after {
    content: "✔";
    position: absolute;
    top: -5px;
    right: -5px;
    background: rgba(0, 204, 106, 0.7);
    color: rgba(0, 0, 0, 0.8);
    border-radius: 50%;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: bold;
}

.legend-icon.in-path-icon {
    border-color: var(--primary-green);
    background: rgba(0, 255, 136, 0.1);
}

.legend-icon.next-step-icon {
    border-color: var(--warning);
    background: rgba(255, 170, 0, 0.1);
}

.legend-icon.optional-icon {
    border-color: var(--purple);
    background: rgba(170, 85, 255, 0.1);
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.1), rgba(0, 204, 106, 0.1));
    border: 2px solid var(--primary-green);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
}

.cta-title {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.cta-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

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

.cta-btn {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: bold;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    display: inline-block;
}

.cta-btn.primary {
    background: linear-gradient(135deg, var(--primary-green), var(--secondary-green));
    color: #000;
}

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

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 255, 136, 0.4);
}

/* ========================================
   Scroll to Top Button
   ======================================== */
.scroll-top {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    width: 45px;
    height: 45px;
    background: rgba(17, 17, 17, 0.8);
    border: 1px solid var(--primary-green);
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    color: var(--primary-green);
    z-index: 1000;
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
}

.scroll-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 255, 136, 0.3);
    background: rgba(0, 255, 136, 0.1);
}

.scroll-top.show {
    display: flex;
}

/* ========================================
   Footer
   ======================================== */
footer {
    background: var(--darker-bg);
    padding: 3rem 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-muted);
}

footer a {
    color: var(--primary-green);
    text-decoration: none;
    transition: color var(--transition-fast);
}

footer a:hover {
    color: var(--secondary-green);
}

.footer-links {
    margin-top: 1rem;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .quiz-question {
        font-size: 1.1rem;
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .course-node {
        width: 100%;
    }
    
    .map-controls {
        flex-direction: column;
    }
    
    .control-btn {
        width: 100%;
    }
    
    .search-container {
        max-width: 100% !important;
    }
    
    .quick-view {
        display: none !important;
    }
}