body, div, input, li, p, span, td, textarea {
    font-family: arial, helvetica, sans-serif;
    font-size: 16px;
}

.calculator-container {
    background-color: white;
    width: 90%;
    max-width: 500px;
    margin: 20px auto;
    padding: 25px;
    border-radius: 20px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.calculator-container h1 {
    color: #053b7d;
    font-size: 1.5rem;
    margin-bottom: 20px;
    text-align: center;
}

.input-container {
    display: flex;
    flex-direction: column;
    margin-bottom: 15px;
}

.input-container label {
    font-weight: bold;
    margin-bottom: 5px;
    color: #333;
}

.input-container input {
    width: 100%;
    padding: 12px;
    font-size: 1rem;
    border: 1px solid #cfd1d8;
    border-radius: 5px;
    outline: none;
    box-sizing: border-box;
}

.input-container input:focus {
    border-color: #053b7d;
    box-shadow: 0 0 5px rgba(5, 59, 125, 0.3);
}

#button-container {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
}

#button-container button {
    padding: 12px 30px;
    border: 0;
    color: #fff;
    font-size: 16px;
    background: #084288;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#button-container button:hover {
    background-color: #0a5a9c;
}

#result {
    margin-top: 25px;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 10px;
    text-align: left;
}

#result h3 {
    color: #053b7d;
    margin-top: 0;
    margin-bottom: 15px;
    text-align: center;
}

#result p {
    margin: 8px 0;
    padding: 8px;
    background: white;
    border-radius: 5px;
}

#result .highlight {
    background-color: #e8f4f8;
    font-weight: bold;
    color: #053b7d;
}

#result .cost {
    background-color: #fff3cd;
    color: #856404;
}

@media (max-width: 600px) {
    .calculator-container {
        width: 95%;
        padding: 15px;
    }

    #button-container {
        flex-direction: column;
    }

    #button-container button {
        width: 100%;
    }
}