<!DOCTYPE html>
<html>
<head>
<title>Bingo Card Generator</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
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<style type="text/css" >
body { background-color: #eee; }
.main {
background-color: #fff;
width: 800px;
margin-left: auto;
margin-right: auto;
margin-top: 20px;
padding: 40px;
}
.help { padding: 10px; }
</style>
</head>
<body>
<div class="main">
<h1>Bingo Card Creator</h1>
<div class="help">
To use this, create an excel spreadsheet with all the possible
cells you want along the left-hand side, with each cell being
a different row but all in the first column, and then upload
it here.
</div>
<div class="help">
Once you get to the bingo card, you can refresh it to create a
new bingo card, or bookmark it to create more bingo cards
later without having to re-upload the spreadsheet.
</div>
<div>
<form id="mainform" enctype="multipart/form-data" action="/process" method="post">
<div class="form-group" id="bingo-fields">
<input name="file" type="file">
</div>
<button type="submit" class="btn btn-primary">Create Bingo Card</button>
</form>
</div>
</div>
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</body>
</html>