body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    padding: 100px 20px;
    text-align: center;
    background: linear-gradient(to right, lightgreen, lightblue);
    box-sizing: border-box;
    margin: 0;
}

.container {
    width: 90%;
    max-width: 400px;
    border: none;
    border-radius: 50px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.9);
    background-color: white;
    padding: 30px 20px 50px;
    margin: auto;
    box-sizing: border-box;
}

.heading {
    font-size: 2rem;
    margin: 10px 0;
}

button {
    font-size: 1.8rem;
    padding: 10px 40px;
    border: none;
    border-radius: 50px;
    background-color: cornflowerblue;
    color: white;
    cursor: pointer;
    transition: transform 0.1s ease-in;
    box-sizing: border-box;
}

button:active {
    transform: scale(1.3);
}

@media (max-width: 430px) {
    body {
        padding: 50px 10px;
    }

    button {
        font-size: 1.4rem;
        padding: 8px 25px;
    }

    .heading {
        font-size: 1.5rem;
    }
}

@media (max-width: 360px) {
    button {
        font-size: 1.1rem;
        padding: 6px 20px;
    }

    .heading {
        font-size: 1.2rem;
    }
}