html,
body {
    font-family: 'Helvetica', sans-serif; 
    font-size: 15px;
    line-height: 19px;
    color: #000;
}
.container {
    display: table;
    width: 95%;
    max-width: 700px;
    margin: 70px auto 100px auto;
    text-align: center;
}
h1 {
    font-size: 40px;
    line-height: 45px;
    margin: 10px auto;
}
p {
    font-size: 20px;
    line-height: 25px;
    margin: 15px auto;
}
.unsubscribe_envelope {
    display: table;
    width: 170px;
    height: auto;
    margin: 30px auto 50px auto;
}
.button {
    display: table;
    width: 95%;
    max-width: 500px;
    padding: 15px 20px;
    margin: 10px auto;
    font-size: 20px;
    line-height: 25px;
    color: #fff;
    background: #6C5CE7;
    border-radius: 10px;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}
.button:hover {
    cursor: pointer;
    opacity: 0.9;
}
.surveyMonkey {
    display: table;
    width: 100%;
    max-width: 600px;
    margin: 20px auto;
}
.small_text {
    font-size: 13px;
    line-height: 15px;
}
.small_text span {
    font-weight: bold;
    color: #6C5CE7;
}