body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f8f9fa;
    color: #333;
}

header {
    background-color: #343a40;
    color: white;
    padding: 30px 20px;
    text-align: center;
}

main {
    max-width: 900px;
    margin: auto;
    padding: 20px;
}

h2 {
    color: #007bff;
    margin-top: 40px;
    text-align: center;
}

section {
    margin-top: 40px;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.center {
    text-align: center;
}

video, img {
    width: 90%;
    max-width: 700px;
    display: block;
    margin: 10px auto;
    border: 1px solid #ccc;
    border-radius: 8px;
}

.caption {
    text-align: center;
    font-size: 0.9em;
    color: #6c757d;
}

.github-button {
    background-color: #007bff;
    color: white;
    padding: 12px 20px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
    margin-top: 20px;
    display: inline-block;
}

footer {
    background-color: #343a40;
    color: white;
    text-align: center;
    padding: 10px;
    margin-top: 40px;
}

/* Fade-in animation */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 1s ease-out forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}