body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #72edf2, #5151e5);
    color: #333333;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.calculator {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    padding: 30px;
    text-align: center;
    max-width: 400px;
    width: 100%;
}

h1 {
    color: #333333;
    font-size: 24px;
    margin-bottom: 20px;
}

label {
    display: block;
    font-weight: bold;
    margin-top: 15px;
    color: #555555;
}

input {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    border: 1px solid #dddddd;
    border-radius: 5px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    background: #5151e5;
    color: #ffffff;
    border: none;
    border-radius: 5px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 20px;
    transition: background 0.3s;
}

button:hover {
    background: #3333cc;
}

#result {
    margin-top: 20px;
    font-size: 18px;
    color: #333333;
}