* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body, html {
    height: 100%;
    font-family: Arial, sans-serif;
}

#backgroundVideo {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover; 
    z-index: -1;
}

.content {
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1;
}

.btn {
    padding: 15px 30px;
    background-color: rgba(255, 255, 255, 0.8); 
    color: #000;
    font-size: 20px;
    text-decoration: none;
    border-radius: 8px;
    transition: background-color 0.3s ease;
    font-weight: bold;
}

.btn:hover {
    background-color: rgba(255, 255, 255, 1); 
}

@media (max-width: 768px) {
    #backgroundVideo {
        width: 100vw;
        height: 100vh;
        object-fit: cover;
    }

    .btn {
        font-size: 18px;
        padding: 12px 24px;
    }
}

@media (max-width: 480px) {
    .btn {
        font-size: 16px;
        padding: 10px 20px;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .btn {
        font-size: 20px;
        padding: 15px 30px;
    }
}

@media (min-width: 1025px) {
    .btn {
        font-size: 24px;
        padding: 20px 40px;
    }
}