§ index.html

1<!DOCTYPE html>
2<html>
3<head>
4    <title>WebAdmin&lt;/title>
5    <meta charset="utf-8" />
6    <meta name="viewport" content="width=device-width, initial-scale=1">
7    <link rel="stylesheet" href="main.css" />
8    <link href="https://fonts.googleapis.com/css?family=Ubuntu+Mono" rel="stylesheet">
9</head>
10<body>
11    Hello! World!
12</body>
13</html>

§ main.css

1html, body {
2    font-family: Arial, serif;
3    font-size: 16px;
4    margin: 0;
5    padding: 0;
6}
7table {
8    border-collapse: collapse;
9}
10table.border td, table.border th {
11    padding: 5px;
12    border: 1px solid #c0c0c0;
13}
14table.border th {
15    background: #e0e0e0;
16}