* {
            box-sizing: border-box;
            font-size: 18px;
            color: white;
            font-family: sans-serif;
        }
        h1 {
            font-size: 32px;
            color: #00e5ff;
        }
        form {
            display: block;
            margin: 20px 0 0 0;
        }
        input, select, button {
            font-size: 20px;
            margin: 2px 0;
            padding: 2px 8px;
        }
        button {
            color: white;
            padding: 4px 12px;
            background-color: green;
        }
        select, input, option {
            background-color: white;
            color: black;
        }
        button, select {
            cursor: pointer;
        }
        label {
            display: block;
            margin: 0 0 5px 0;
        }
        body {
            background-image: url("bg.jpg");
            background-repeat: no-repeat;
            background-color: black;
            margin: 20px;
            padding: 0;
        }
        .error, .warning {
            display: inline-block;
            padding: 4px 8px;
            margin: 0 0 5px 0;
        }
        .error {
            background-color: darkred;
            color: white;
        }
        .warning {
            background-color: orange;
            color: black;
        }
        .tip span {
            font-style: italic;
        }
        .main {
            border: 1px solid #00e5ff;
            padding: 20px;
        }
        a {
            color: #00e5ff;
            font-weight: bold;
            font-size: 26px;
        }