*, *:after, *:before {
    box-sizing: border-box;
}

h1, h2, h3, h4, h5, h6 {
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-weight: normal;
}

html, body {
    padding: 0;
    margin: 0;
}

pre {
    padding: 0;
    margin: 0;
}

.site-container {
    width: 100%;
    text-align: left;
}

.demo-container {
    margin: 0 auto;
    position: relative;
}

.demo-container h1,
.demo-container h2,
.demo-container h3,
.demo-container h4,
.demo-container h5,
.demo-container h6 {
    position: absolute;
    bottom: 50px;
    right: 50px;
    color: #fff;
}

.demo-container button {
    padding: 0;
    margin: 0;
    border: 0;
    display: inline-block;
    font-size: 16px;
    line-height: 1;
    padding: 0.5em 0.8em;
    border-radius: 2px;
    background: rgba(0, 0, 0, 0.8);
    color: #fff;
    cursor: pointer;
    transition: background 0.3s ease-in-out;
    outline: 0;
}

.demo-container button:hover {
    background: rgba(0, 0, 0, 0.5);
}

.demo-container button:active {
    background: rgba(0, 0, 0, 1);
}

.demo-container--vh-sm { height: 250px; }
.demo-container--vh-md { height: 500px; }
.demo-container--vh-lg { height: 750px; }
.demo-container--vh-half { height: 50vh; }
.demo-container--vh-full { height: 100vh; }

.demo-container-buttons {
    z-index: 3;
    position: absolute;
    bottom: 50px;
    left: 50px;
}

.demo-container-options {
    z-index: 3;
    position: absolute;
    top: 50px;
    right: 50px;
    background: #fff;
    border-radius: 3px;
    padding: 30px;
    color: rgba(0, 0, 0, 0.66);
    line-height: 1.33;
}

.demo-container-options--left {
    right: inherit;
    left: 50px;
}

.demo-a { background: #26C6DA; }
.demo-b { background: #F5D133; }
.demo-c { background: #4DB6AC; }
.demo-d { background: #5c3ce3; }

.demo-a .wavy-photo {
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -20px 0 0 -20px;
}

.demo-b .wavy-photo {
    position: absolute;
    top: 25%;
    left: 75%;
    margin: -20px 0 0 -20px;
}

.demo-c .wavy-photo {
    position: absolute;
    top: 100px;
    left: 100px;
    margin: -20px 0 0 -20px;
}

.demo-d .wavy-photo {
    position: absolute;
    top: 30%;
    right: 30%;
    margin: -20px 0 0 -20px;
}