*{
    margin: 0;
    padding: 0;
}

body{
    background-color: #202124;
    font-family: Arial, Helvetica, sans-serif;
    vertical-align: top;
}

h1,h3{
    color: #fff;
}

h1{
    font-size: 30px;
}

h3{
    font-size: 15px;
}

.sms{
    margin: 30px 100px 30px 100px;
    padding: 50px;
    text-align: center;
    background-color: darkblue;
    border-radius: 0 150px;
}

.audio{
    margin: 50px 200px 50px 200px;
    padding: 50px;
    text-align: center;
    outline: 15px solid darkblue;
}

section article{
    background-color: darkblue;
    margin: 50px;
    border-radius: 50px;
}

section article i{
    color: #fff;
    font-size: 80px;
    margin: 40px;
}

section article audio{
    width: 60%;
    max-width: 100%;
}

footer{
    background-color: darkblue;
    color: #fff;
    width: 100%;
    height: 20px;
    text-align: center;
    padding: 20px 0px;
}

footer a{
    color: #fff;
}

@media (max-width: 768px) {
    .sms{
        margin: 20px 30px;
        padding: 35px;
        border-radius: 0 100px;
    }

    h1{
        font-size: 26px;
    }

    h3{
        font-size: 14px;
    }

    .audio{
        margin: 30px 30px;
        padding: 35px;
        outline-width: 10px;
    }

    section article{
        margin: 30px;
        border-radius: 40px;
    }

    section article i{
        font-size: 60px;
        margin: 30px;
    }

    footer{
        height: 18px;
        padding: 18px 0;
        font-size: 14px;
    }
}

@media (max-width: 425px) {
    .sms{
        margin: 15px 15px;
        padding: 30px 20px;
        border-radius: 0 60px;
    }

    h1{
        font-size: 22px;
    }

    h3{
        font-size: 13px;
    }

    .audio{
        margin: 20px 15px;
        padding: 25px 15px;
        outline-width: 8px;
        text-align: center;
    }

    section article{
        margin: 20px auto;
        padding: 15px 10px;
        max-width: 100%;
        border-radius: 30px;
        display: block;

    }

    section article i{
        font-size: 40px;
        margin: 0 auto 15px auto;
        display: block;
    }

    section article audio{
        display: block;
        width: 100%;
        margin: 0 auto;
        max-width: 100%;
        border-radius: 25px;
    }

    footer{
        height: 16px;
        padding: 16px 0;
        font-size: 13px;
    }
}

@media (max-width: 375px) {
    .sms{
        margin: 10px 10px;
        padding: 20px 15px;
        border-radius: 0 40px;
    }

    h1{
        font-size: 20px;
    }

    h3{
        font-size: 12px;
    }

    .audio{
        margin: 15px 10px;
        padding: 20px 10px;
        outline-width: 6px;
    }

    section article{
        margin: 15px 5px;
        border-radius: 25px;
    }

    section article i{
        font-size: 35px;
        margin: 15px;
    }

    footer{
        height: 14px;
        padding: 14px 0;
        font-size: 12px;
    }
}

@media (max-width: 320px) {
    .sms{
        margin: 8px 8px;
        padding: 15px 12px;
        border-radius: 0 30px;
    }

    h1{
        font-size: 17px;
    }

    h3{
        font-size: 11px;
    }

    .audio{
        margin: 10px 8px;
        padding: 15px 8px;
        outline-width: 5px;
    }

    section article{
        margin: 10px 3px;
        border-radius: 20px;
    }

    section article i{
        font-size: 28px;
        margin: 12px;
    }

    footer{
        height: 12px;
        padding: 12px 0;
        font-size: 11px;
    }
}