* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #24292e;
    background-color: #f6f8fa;
}

/* Navigation */
nav {
    background-color: #fff;
    border-bottom: 1px solid #e1e4e8;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #0d1117;
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    color: #24292e;
    text-decoration: none;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #0366d6;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #0d1117 0%, #1f6feb 100%);
    color: white;
    padding: 100px 20px;
    text-align: center;
}

.hero-content {
    max-width: 1280px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 40px;
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 30px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background-color: white;
    color: #0d1117;
}

.btn-primary:hover {
    background-color: #f6f8fa;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Features Section */
.features {
    padding: 80px 20px;
    background-color: white;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #0d1117;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.feature-card {
    padding: 40px;
    border-radius: 8px;
    background-color: #f6f8fa;
    border: 1px solid #e1e4e8;
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: #0366d6;
    box-shadow: 0 3px 12px rgba(3, 102, 214, 0.15);
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #0d1117;
}

.feature-card p {
    color: #586069;
    line-height: 1.8;
}

/* Projects Section */
.projects {
    padding: 80px 20px;
    background-color: #f6f8fa;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.project-card {
    background-color: white;
    border-radius: 8px;
    padding: 30px;
    border: 1px solid #e1e4e8;
    transition: all 0.3s;
}

.project-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    transform: translateY(-5px);
}

.project-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #0366d6;
    text-decoration: none;
}

.project-card p {
    color: #586069;
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.project-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 15px;
}

.tag {
    background-color: #f1f3f5;
    color: #24292e;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.85rem;
}

/* Stats Section */
.stats {
    background-color: white;
    padding: 60px 20px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    text-align: center;
}

.stat-item h2 {
    font-size: 2.5rem;
    color: #0366d6;
    margin-bottom: 10px;
}

.stat-item p {
    color: #586069;
    font-size: 1.1rem;
}

/* Footer */
footer {
    background-color: #0d1117;
    color: #8b949e;
    padding: 40px 20px;
    text-align: center;
}

.footer-content {
    max-width: 1280px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.footer-links a {
    color: #8b949e;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #c9d1d9;
}

.footer-divider {
    border-top: 1px solid #30363d;
    margin: 20px 0;
}

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

    .hero p {
        font-size: 1.1rem;
    }

    .nav-links {
        gap: 15px;
        font-size: 0.9rem;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .section-title {
        font-size: 1.8rem;
    }
}