* {
    box-sizing: border-box
}

body {
    background-color: #f8f9fa;
    font-family: sans-serif;
    margin: 10px 0
}

h1 {
    font-size: 32px;
    text-align: center;
    margin: 20px 0
}

li,
p {
    font-size: 18px;
    line-height: 1.4
}

a {
    color: #007bff
}

small {
    font-size: 14px
}

img {
    margin-top: 20px;
    width: 100%
}

.container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: 10px;
    background-color: #fff;
    box-shadow: 0 0 10px #ddd
}

.badge {
    padding: 5px 10px;
    background-color: #e8e9ea;
    color: #68696a;
    border-radius: 6px;
    font-size: 14px
}

.icon {
    line-height: 0;
    color: #fd0b0b
}

.btn {
    display: inline-block;
    margin-bottom: 20px;
    font-weight: 700;
    font-size: 18px;
    -webkit-text-decoration: none;
    text-decoration: none;
    border-radius: 6px;
    color: #fff;
    background-color: #007bff;
    padding: 20px 40px
}

.adv,
.btn,
.footer,
.text-center {
    text-align: center
}

.adv,
.footer {
    padding: 10px;
    font-size: 13px;
    font-weight: 300;
    color: #98999a
}

.footer {
    width: 100%;
    max-width: 800px;
    margin: 100px auto 0
}

.footer a {
    color: inherit
}

.footer ol {
    text-align: left
}

.footer li {
    font-size: inherit
}

.adv {
    display: none
}

@media (min-width:768px) {
    h1 {
        font-size: 36px
    }

    .btn {
        font-size: 20px
    }

    .adv {
        display: block
    }
}