body {
    margin: 0;
    background-image: url(./wave-haikei.png);
    background-repeat: no-repeat;
    background-size: cover;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: monospace;
}

.container {
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 6px 10px rgba(0, 0, 0, .3);
    width: 85%;
    color: #ADD8E6;
    text-align: center;
}

.heading {
    font-size: 35px;
    font-weight: 600;
    font-family: Georgia, 'Times New Roman', Times, serif;
    text-shadow: 5px 5px 2px rgba(173, 216, 230, .3);
    letter-spacing: 2px;
}

.joke {
    font-size: 25px;
    font-weight: 500;
    margin: 40px;
}


.btn {
    font-size: 18px;
    font-weight: 700;
    border-radius: 8px;
    cursor: pointer;
    padding: 10px;
    color: white;
    background-color: rgba(176, 224, 230, .2);
    text-transform: uppercase;
    width: 300px;
}

.btn:hover {
    background-color: rgba(135, 206, 235, .3);
    transition: all 300ms ease;
}


@media only screen and (max-width: 319px) {
    body {
        background-image: none;
        background-color: rgba(0, 18, 32,.9);
    }

    .container {
        width: 90%;
    }

    .btn {
        font-size: 16px;
        padding: 8px;
        width: 250px;
    }
}