.gpa-calculator {
    max-width: 600px;
    background: #ffffff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 0 12px rgba(0,0,0,0.1);
    font-family: Arial, sans-serif;
}

.gpa-calculator h3 {
    text-align: center;
}

.gpa-calculator label {
    display: block;
    margin-top: 10px;
    font-weight: 600;
}

.gpa-calculator input,
.gpa-calculator select {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
}

.gpa-calculator button {
    margin-top: 15px;
    padding: 10px;
    width: 100%;
    background: #0073aa;
    color: #fff;
    border: none;
    cursor: pointer;
    border-radius: 6px;
}

.gpa-calculator button:hover {
    background: #005f8d;
}