body {
    font-family: Arial, sans-serif;
    background: linear-gradient(to right, #007BFF, #00C6FF);
    color: #333333;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.ctr-calculator {
    background: #ffffff;
    padding: 20px 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    width: 300px;
}

h1 {
    font-size: 24px;
    margin-bottom: 10px;
}

p {
    font-size: 14px;
    margin-bottom: 20px;
}

.input-group {
    margin-bottom: 15px;
    text-align: left;
}

label {
    display: block;
    font-size: 14px;
    margin-bottom: 5px;
}

input {
    width: 100%;
    padding: 8px;
    font-size: 14px;
    border: 1px solid #cccccc;
    border-radius: 5px;
}

button {
    background: #007BFF;
    color: #ffffff;
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s;
}

button:hover {
    background: #0056b3;
}

.result {
    margin-top: 20px;
    font-size: 16px;
    color: #007BFF;
}