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

html, body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #f0f0f0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100vw;
    overflow: hidden;
    transform: translateZ(0);
}

.container {
    max-width: 800px;
    width: 100%;
    padding: 20px;
    text-align: center;
}

h1 {
    color: #333;
    margin-bottom: 20px;
}

.video-container {
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    transform: translate3d(0, 0, 0);
    will-change: transform;
    overflow: hidden;
}

.background-image {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
}

.background-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    backface-visibility: hidden;
    transform: translateZ(0);
    will-change: transform;
}

video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    backface-visibility: hidden;
    transform: translateZ(0);
}

.instructions {
    margin-top: 20px;
    padding: 15px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    transform: translateZ(0);
}

.instructions p {
    color: #666;
    font-size: 1.1em;
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    transform: translate3d(0, 0, 0);
    will-change: transform;
}

.image-overlay img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    backface-visibility: hidden;
    transform: translateZ(0);
}