* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background: #f4f4f4;
    color: #333;
}
header {
    background: #0f172a;
    color: white;
    padding: 2rem 1rem;
    text-align: center;
}
main {
    padding: 2rem 1rem;
}
.intro, .features, .cta {
    margin-bottom: 2rem;
    text-align: center;
}
.features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.feature {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
footer {
    text-align: center;
    padding: 1rem;
    background: #e2e8f0;
}