:root {
    --primary-color: #2dd4bf;
}
body {
    font-family: system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: #0f172a;
    color: #e2e8f0;
}
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}
.header {
    text-align: center;
    margin-bottom: 3rem;
}
.header h1 {
    color: var(--primary-color);
    font-size: 2.5rem;
    margin-bottom: 1rem;
}
.nav {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}
.nav a {
    color: #e2e8f0;
    text-decoration: none;
    margin: 0 1rem;
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.3s;
}
.nav a:hover, .nav a.active {
    border-color: var(--primary-color);
}
.content {
    background: #1e293b;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}
.section {
    margin-bottom: 2rem;
}
.section h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}
a {
    color: var(--primary-color);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    .header h1 {
        font-size: 2rem;
    }
}