* {
    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: #333;
    background: #f5f5f5;
}

header {
    background: #2c3e50;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav h1 {
    font-size: 1.5rem;
}

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

nav a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
}

nav a:hover {
    opacity: 0.8;
}

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

.hero {
    background: white;
    padding: 3rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
    margin-bottom: 2rem;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.hero p {
    font-size: 1.2rem;
    color: #666;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.feature {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.feature h3 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.feature p {
    color: #666;
}

.about {
    background: white;
    padding: 3rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.about h2 {
    color: #2c3e50;
    margin-bottom: 1rem;
}

.about h3 {
    color: #34495e;
    margin-top: 2rem;
    margin-bottom: 0.5rem;
}

.about ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.about pre {
    background: #f5f5f5;
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    margin-top: 1rem;
}

.about code {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
}

@media (max-width: 768px) {
    nav {
        flex-direction: column;
        gap: 1rem;
    }

    .hero h2 {
        font-size: 2rem;
    }

    .features {
        grid-template-columns: 1fr;
    }
}