body {
    background-color: #f9fddc;
    font-family: "Georgia", serif;
    text-align: center;
    margin: 0;
    padding: 0;
}

h1 {
    text-transform: uppercase;
    margin-top: 30px;
    margin-bottom: 20px;
}

.content {
    background-color: #f4f297;
    padding: 20px;
    border-radius: 10px;
    display: inline-block;
}

label {
    font-weight: bold;
    font-size: 14px;
    margin-right: 5px;
}

input[type="text"],
input[type="number"],
select {
    padding: 5px;
    margin: 5px;
    border-radius: 4px;
    border: 1px solid #999;
    font-size: 14px;
}

button {
    padding: 5px 10px;
    margin: 10px 5px;
    font-weight: bold;
    font-size: 14px;
    border-radius: 4px;
    border: 1px solid #999;
    background-color: #eaeaea;
    cursor: pointer;
}

button:hover {
    background-color: #ccc;
}

.container {
    margin-top: 20px;
    text-align: left;
    display: inline-block;
}

.container > div {
    margin-bottom: 10px;
}

.result {
    margin-top: 20px;
    font-size: 16px;
    font-weight: bold;
}

.res {
    color: #003300;
}

.err,
#s_error {
    color: red;
    font-size: 14px;
}