body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #f6f8fa;
    margin: 0;
    color: #222;
}
header {
    background: #22223b;
    color: #fff;
    padding: 2rem 0 1rem 0;
    text-align: center;
}
header h1 {
    margin: 0;
    font-size: 2.5rem;
}
header p {
    margin: 0.5rem 0 0 0;
    font-size: 1.2rem;
    font-weight: 500;
}
main {
    max-width: 600px;
    margin: 2rem auto;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.07);
    padding: 2rem;
}
.plan h2 {
    margin-top: 0;
    color: #4a4e69;
}
.plan ol {
    padding-left: 1.2rem;
}
.plan li {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}
footer {
    text-align: center;
    padding: 1rem 0;
    background: #22223b;
    color: #fff;
    position: fixed;
    width: 100%;
    bottom: 0;
    left: 0;
}
@media (max-width: 700px) {
    main {
        margin: 1rem;
        padding: 1rem;
    }
    header h1 {
        font-size: 2rem;
    }
}