.container.calc {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    border-radius: 8px;
}

.container.calc .form-group {
    margin-bottom: 15px;
}

.container.calc label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.container.calc input, .container.calc select, .container.calc button {
    width: 100%;
    padding: 10px;
    font-size: 1.25rem;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.container.calc button {
    font-size: 1.75rem;
}

.container.calc button {
    background-color: #007bff;
    color: white;
    border: none;
    cursor: pointer;
}

.container.calc button:hover {
    background-color: #0056b3;
}

.container.calc .result {
    margin-top: 20px;
    padding: 10px;
    background-color: #e7f5e7;
    border: 1px solid #d4edda;
    border-radius: 4px;
    font-size: 1.75rem;
    text-align: center;
}

.container.calc .info {
    font-size: 1.5rem;
    color: #555;
    margin-top: 5px;
}

.container.calc #inviteInfo {
    min-height: 20px;
    display: block;
}