.apush-calculator {
    padding: 20px;
    border-radius: 5px;
    max-width: 600px;
    margin: 0 auto;
}
.apush-calculator-title {
    margin-bottom: 10px;
}
.apush-calculator-description {
    margin-bottom: 20px;
}
.apush-form-field {
    margin-bottom: 15px;
}
.apush-form-field label {
    display: block;
    margin-bottom: 5px;
}
.apush-form-field input {
    width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}
.apush-calculator button {
    cursor: pointer;
}
.apush-calculator button:hover {
    opacity: 0.9;
}
.apush-calculator-result {
    margin-top: 20px;
    font-weight: bold;
}
@media (max-width: 600px) {
    .apush-calculator {
        padding: 15px;
    }
}