main ul {
    list-style-position: inside;
    padding-left: 1.2rem;
    margin-top: 0.3rem;
}
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    background-image: linear-gradient(to bottom, #007bff, 80%, #b8d9ff);
    padding: 0.5rem 1rem;
    border-radius: 15px;
}
.app-header h2 {
    margin-bottom: 0;
}
.app-header img {
    height: 32px;
    width: auto;
}
.promo-image {
    max-width: 100%;
    height: auto;
    margin-bottom: 1rem;
}
.app-buttons {
    text-align: center;
}
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    margin-right: 1rem;
    margin-top: 1rem;
    background-color: #007bff;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    text-align: center;
    transition: background-color 0.3s ease;
}
.btn:hover {
    background-color: #0056b3;
}
main section:last-of-type {
    margin-bottom: 32px;
}
@media (min-width: 769px) {
    .app-body {
        display: flex;
        gap: 2rem;
    }
    .app-body .promo-image {
        width: 50%;
        flex-shrink: 0;
        margin-bottom: 0;
    }
    .app-body .app-details {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }
    .app-buttons {
        text-align: left;
    }
    .app-header img {
        height: 48px;
    }
}
@media (prefers-color-scheme: dark) {
    .app-header {
        background-image: linear-gradient(to bottom, #222222, 80%, #666666);
    }
    .btn{
        background-color: #222222;
    }
    .btn:hover {
        background-color: #444;
    }
}