body {
    font-family: Arial, sans-serif;
    display: flex;
    height: 100vh;
    justify-content: center;
    align-items: center;
    background-color: #6d6969;
}

.container {
    text-align: center;
    background: rgb(130, 184, 152);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

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

.result {
    font-size: 24px;
    font-weight: bold;
    margin-top: 20px;
}

.btn-group button {
    padding: 10px 20px;
    margin: 5px;
    font-size: 16px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    transition: 0.3s;
}

.btn-group button:hover {
    opacity: 0.8;
}

#redBtn {
    background-color: red;
    color: white;
}

#greenBtn {
    background-color: green;
    color: white;
}

#blueBtn {
    background-color: blue;
    color: white;
}