Use CSS Media Queries
You can use CSS Media Query to create layout for different devices and screen sizes.
<html>
<head>
<style>
/** Gear, Gear 2 and Gear 2 Neo **/
@media all and (min-width: 320px) and (max-width: 320px) {
#clock {
position: absolute;
top: 10px;
left: 10px;
width: 300px;
height: 100px;
background: #ff0000;
}
}
/** Gear S **/
@media all and (min-width: 360px) and (max-width: 360px) {
#clock {
position: absolute;
top: 10px;
left: 10px;
width: 340px;
height: 150px;
background: #ff0000;
}
}
</style>
</head>
<body>
<div id="clock"></div>
</body>
</html>