form {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    width: 420px;
    margin: auto;
}
label {
    font-weight: bold;
    margin-top: 10px;
    display: block;
}
select, input[type="text"] {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
    border-radius: 4px;
    border: 1px solid #ccc;
}
input[type="submit"] {
    background-color: #007bff;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 20px;
    width: 100%;
}
input[type="submit"]:hover {
    background-color: #0056b3;
}
table {
    width: 100%;
    margin-top: 20px;
    border-collapse: collapse;
}
table, th, td {
    border: 1px solid black;
}
th, td {
    padding: 10px;
    text-align: left;
}
.hidden {
    display: none;
}
.table {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    width: 1200px;
    margin: auto;
    margin-top: 50px;
}
th {
    font-size: 80%;

}
.checkbox-group {
    margin: 10px 0;
}
.checkbox-group label {
    font-weight: normal;
    display: inline-block;
    margin-left: 10px;
}

.error-message {
    color: #dc3232;
    padding: 10px;
    font-size: 1em;
}

.hidden {
    display: none;
}

.error {
    border-color: #dc3232;
}

.calc-version {
    width: 420px;
    margin: 10px auto 0;
    padding: 8px 20px;
    box-sizing: border-box;
    font-size: 12px;
    text-align: right;
}