.calculator-container {
    max-width: 700px;
    margin: 70px auto;
    padding: 30px;
    background: #ffffff;
    border: 1px solid #e6f0ff;
    border-radius: 10px;
    box-shadow: 0px 0px 15px rgba(0, 0, 0, 0.2);
}

    .calculator-container h1 {
        text-align: center;
        margin-bottom: 20px;
        color: #2a5c91;
    }

label {
    font-weight: 600;
    margin-bottom: 12px;
    font-size: 16px;
    color: #2a5c91;
}

select, input {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 6px;
    border: 1px solid #ccc;
    background: #f8faff;
}

::selection {
    background: #007BFF; /* Selection background */
    color: white; /* Selection text color */
}

input.invalid, select.invalid {
    border: 2px solid #ff8800;
}

.calculate-btn {
    width: 100%;
    padding: 12px;
    background: #2a5c91;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
}

    .calculate-btn:hover {
        opacity: 0.9;
    }

.result {
    margin-top: 20px;
    font-size: 18px;
    font-weight: bold;
    text-align: center;
}
    .result.low {
        color: green;
    }

    .result.medium {
        color: orange;
    }

    .result.high {
        color: red;
    }

@media (max-width: 768px) {
    .calculator-container {
        margin: 80px 21px 0px 21px;
        padding: 15px;
    }