body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    margin: 0;
    padding: 0;
}

.calculator-container {
    max-width: 500px;
    margin: 40px auto;
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    color: #2c7a7b;
}

label {
    display: block;
    margin-top: 15px;
    font-weight: bold;
}

input, select {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button {
    margin-top: 20px;
    width: 100%;
    padding: 10px;
    background: #2c7a7b;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
}

button:hover {
    background: #285e61;
}

.result-box {
    margin-top: 20px;
    padding: 15px;
    background: #e6fffa;
    border: 1px solid #b2f5ea;
    border-radius: 5px;
}