* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}
body {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f0f0f0;
    color: #333;
}
.main {
    text-align: center;
}
h1 {
    font-size: 35px;
    margin-bottom: 20px;
}
img {
    border: 10px solid #000000;
    margin-top: 20px;
    border-radius: 50%;
    animation: fananim linear infinite;
    width: 400px;
    margin-bottom: 20px;
}
@keyframes fananim {
    100% {
        transform: rotate(360deg);
    }
}
button {
    width: 70px;
    height: 70px;
    margin: 10px;
    font-size: 18px;
    font-weight: bold;
    border: none;
    background-color: #3f3f3f;
    color: white;
    border-radius: 50%;
    transition: 0.3s ease;
    cursor: pointer;
}
button:hover {
    background-color: #0056b3;
}
button:active {
    box-shadow: 0px 5px 10px rgba(0, 0, 0, 0.2);
    transform: scale(0.95);
}
.btn-on {
    background-color: #28a745;
}
.btn-off {
    background-color: #dc3545;
}