/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --dark-bg: #1a0b2e;
    --darker-bg: #0f0720;
    --purple: #8b5cf6;
    --pink: #ec4899;
    --neon-green: #bef264;
    --neon-yellow: #fbbf24;
    --cyan: #06b6d4;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --card-bg: rgba(139, 92, 246, 0.1);
    --border-color: rgba(139, 92, 246, 0.3);
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--darker-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

code, pre, .terminal-body {
    font-family: 'JetBrains Mono', monospace;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 7, 32, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neon-green);
}

.logo img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--neon-green);
}

.nav-buttons {
    display: flex;
    gap: 1rem;
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-large, .btn-course {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: linear-gradient(135deg, var(--purple), var(--pink));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(139, 92, 246, 0.4);
}

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

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-course {
    width: 100%;
    margin-top: 1rem;
    background: var(--card-bg);
    color: var(--neon-green);
    border: 1px solid var(--border-color);
}

.btn-course:hover {
    background: var(--purple);
    color: white;
}

/* Hero Section */
.hero {
    margin-top: 80px;
    padding: 6rem 0;
    background: linear-gradient(180deg, var(--darker-bg) 0%, var(--dark-bg) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.2) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.terminal-window {
    max-width: 600px;
    margin: 0 auto 2rem;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.terminal-header {
    background: rgba(30, 20, 50, 0.8);
    padding: 0.75rem;
    display: flex;
    gap: 0.5rem;
}

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

.dot.red { background: #ef4444; }
.dot.yellow { background: #fbbf24; }
.dot.green { background: #22c55e; }

.terminal-body {
    padding: 1.5rem;
    font-size: 0.95rem;
}

.prompt {
    color: var(--neon-green);
    margin-right: 0.5rem;
}

.output {
    color: var(--cyan);
    margin: 0.25rem 0;
}

.cursor {
    color: var(--neon-green);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero h1 {
    font-size: 4rem;
    text-align: center;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.gradient-text {
    background: linear-gradient(135deg, var(--purple), var(--pink), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    text-align: center;
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 2rem;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 4rem;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
}

.stat {
    text-align: center;
}

.stat h3 {
    font-size: 2.5rem;
    color: var(--neon-green);
    margin-bottom: 0.5rem;
}

.stat p {
    color: var(--text-secondary);
}

/* Courses Section */
.courses {
    padding: 6rem 0;
    background: var(--dark-bg);
}

.courses h2, .challenges h2, .community h2, .leaderboard h2 {
    font-size: 3rem;
    text-align: center;
    margin-bottom: 1rem;
}

.section-description {
    text-align: center;
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.course-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s;
}

.course-card:hover {
    transform: translateY(-5px);
    border-color: var(--purple);
    box-shadow: 0 10px 30px rgba(139, 92, 246, 0.3);
}

.course-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.course-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--neon-green);
}

.course-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    min-height: 60px;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.difficulty {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.difficulty.beginner {
    background: rgba(34, 197, 94, 0.2);
    color: #22c55e;
}

.difficulty.intermediate {
    background: rgba(251, 191, 36, 0.2);
    color: #fbbf24;
}

.difficulty.advanced {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

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

/* Challenges Section */
.challenges {
    padding: 6rem 0;
    background: var(--darker-bg);
}

.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.challenge-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s;
}

.challenge-card:hover {
    transform: translateY(-5px);
    border-color: var(--cyan);
    box-shadow: 0 10px 30px rgba(6, 182, 212, 0.3);
}

.challenge-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.challenge-header h3 {
    font-size: 1.5rem;
    color: var(--neon-green);
}

.points {
    background: linear-gradient(135deg, var(--purple), var(--pink));
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.9rem;
}

.challenge-card > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.challenge-tags {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tag {
    background: rgba(139, 92, 246, 0.2);
    color: var(--purple);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.85rem;
}

.challenge-stats {
    display: flex;
    gap: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Community Section */
.community {
    padding: 6rem 0;
    background: var(--dark-bg);
}

.community-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.community-feature {
    text-align: center;
    padding: 2rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s;
}

.community-feature:hover {
    transform: translateY(-5px);
    border-color: var(--pink);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.community-feature h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--neon-green);
}

.community-feature p {
    color: var(--text-secondary);
}

.recent-posts {
    margin-top: 4rem;
}

.recent-posts h3 {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.posts-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.post-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
}

.post-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.post-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--purple), var(--pink));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.post-author h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.post-time {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.post-category {
    background: rgba(6, 182, 212, 0.2);
    color: var(--cyan);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.85rem;
}

.post-content {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.post-actions {
    display: flex;
    gap: 1rem;
}

.post-actions button {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.post-actions button:hover {
    background: var(--purple);
    color: white;
    border-color: var(--purple);
}

/* Leaderboard Section */
.leaderboard {
    padding: 6rem 0;
    background: var(--darker-bg);
}

.leaderboard-table {
    max-width: 800px;
    margin: 0 auto;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.leaderboard-header {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr 1fr;
    gap: 1rem;
    padding: 1.5rem;
    background: rgba(139, 92, 246, 0.2);
    font-weight: 700;
    border-bottom: 1px solid var(--border-color);
}

.leaderboard-row {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr 1fr;
    gap: 1rem;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    align-items: center;
    transition: all 0.3s;
}

.leaderboard-row:hover {
    background: rgba(139, 92, 246, 0.1);
}

.leaderboard-row:last-child {
    border-bottom: none;
}

.rank {
    font-weight: 700;
    font-size: 1.1rem;
}

.rank-1 { background: rgba(255, 215, 0, 0.1); }
.rank-2 { background: rgba(192, 192, 192, 0.1); }
.rank-3 { background: rgba(205, 127, 50, 0.1); }

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.leaderboard-row .points {
    color: var(--neon-green);
    font-weight: 700;
}

/* CTA Section */
.cta {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--purple), var(--pink));
    text-align: center;
}

.cta h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.cta p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
}

/* Footer */
footer {
    background: var(--darker-bg);
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--neon-green);
}

.footer-section p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: var(--neon-green);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

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

    .stats {
        flex-direction: column;
        gap: 2rem;
    }

    .courses h2, .challenges h2, .community h2, .leaderboard h2 {
        font-size: 2rem;
    }

    .courses-grid, .challenges-grid {
        grid-template-columns: 1fr;
    }

    .leaderboard-header, .leaderboard-row {
        grid-template-columns: 0.5fr 2fr 1fr 0.8fr;
        font-size: 0.9rem;
        padding: 1rem;
    }
}