<!DOCTYPE html>
<html>
<head>
<title>Counter</title>
<style>
* {
font-family: sans-serif;
font-size: 16pt;
}
h1 {
font-size: 18pt;
font-weight: bold;
margin: 0;
}
button {
padding: 5px 10px;
border: none;
background: slategrey;
margin: 10px auto;
color: white;
}
body {
width: 400px;
margin: auto;
}
#container,
.counter {
display: flex;
flex-flow: column;
justify-content: flex-start;
align-items: flex-start;
align-content: flex-start;
}
.counter {
margin-bottom: 10px;
background: steelblue;
color: white;
align-items: center;
width: 100%;
}
.field {
display: flex;
flex-flow: row;
justify-content: space-around;
width: 100%;
}
</style>
</head>
<body>
<button id="add-counter" type="button">add counter</button>
<div id="container">
</div>
</body>
</html>