body {
    font-family: sans-serif;
    font-size: 18px;
    color: #4e4e4e;
}

.outer-wrap {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    height: 100%;
    width: 100%;
    display: block;
}

.stech-content {
  text-align: center;
}
.stech-content img {
    max-width: 100%;
    height: auto;
}

.inner-wrap {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    height: 400px;
    width: 80%;
    min-width:400px;
    margin: auto;
}

a.button.btn.btn-primary {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: #990000;
    border-radius: 4px;
    color: #fff;
    font-family: sans-serif;
    text-decoration: none;
    font-weight: 600;
}

a.button.btn.btn-primary:hover {
    background: #FF5722;
}