.otto-catfish-calculator {
    max-width: 500px;
    margin: auto;
    padding: 20px;
    background: #f4fff4;
    border: 2px solid #2e7d32;
    border-radius: 10px;
    font-family: Arial;
}

.otto-catfish-calculator h2 {
    color: #2e7d32;
    text-align: center;
}

.otto-catfish-calculator label {
    display: block;
    margin-top: 10px;
    font-weight: bold;
}

.otto-catfish-calculator input {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
}

.otto-catfish-calculator button {
    margin-top: 15px;
    width: 100%;
    padding: 10px;
    background: #2e7d32;
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

.otto-catfish-calculator button:hover {
    background: #1b5e20;
}

#result p {
    margin: 5px 0;
}