body {
    background: #ececec;
    text-align: center;
}

.container-fluid {
    max-width: 90%
}
section {
    margin-bottom: 50px;
}
#step2, #step3 {
    display: none;
}
@media (min-width: 481px) {
    .flex {
        display: -ms-flexbox;
        display: -webkit-flex;
        display: flex;
        -webkit-flex-direction: row;
        -ms-flex-direction: row;
        flex-direction: row;
        -webkit-flex-wrap: nowrap;
        -ms-flex-wrap: nowrap;
        flex-wrap: nowrap;
        -webkit-justify-content: center;
        -ms-flex-pack: center;
        justify-content: center;
        -webkit-align-content: stretch;
        -ms-flex-line-pack: stretch;
        align-content: stretch;
        -webkit-align-items: stretch;
        -ms-flex-align: stretch;
        align-items: stretch;
    }
}
.flex ~ p {
    font-size: 26px;
    margin: .82rem 0 .656rem
}
.flex ~ p:last-of-type {
    margin-bottom: 30px;
}
.box, .form-group {
    text-align: left;
    padding: 20px;
    margin: 30px 15px;
    width: calc(25% - 30px);
    box-shadow: 0 2px 5px 0 rgba(0,0,0,.16), 0 2px 10px 0 rgba(0,0,0,.12);
    background: #fff;
}
.form-group {
    text-align: center;
    margin: 30px 15px !important;
    width: calc(100% - 30px);
}
.box img {
    width: 100%;
}
.btn {
    text-transform: uppercase;
    border-radius: 0;
    margin: 0 15px 30px;
    -webkit-transition: all 0.2s ease-in-out;
    -moz-transition: all 0.2s ease-in-out;
    -ms-transition: all 0.2s ease-in-out;
    -o-transition: all 0.2s ease-in-out;
    transition: all 0.2s ease-in-out;
}
.form-control {
    border: 0;
    margin-bottom: 20px;
    height: 60px;
    box-shadow: none;
    border-radius: 0;
    border-bottom: 1px solid #ddd;
}
.form-control:focus {
    box-shadow: 0 1px 0 0 #4caf50;
}
@media (max-width: 768px) {
    h1 {
        font-size: 24px;
    }
    h2 {
        font-size: 20px;
    }
    .box {
        width: calc(50% - 30px);
    }
}
@media (max-width: 480px) {
    h1 {
        font-size: 18px;
    }
    h2 {
        font-size: 16px;
    }
    p {
        font-size: 13px;
    }
    .box {
        width: calc(100% - 30px);
    }
    .flex ~ p {
        font-size: 16px;
    }
    .btn {
        margin: 0 0 30px;
    }
}