* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: sans-serif;
    color: #fff;
}

body {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.back-video {
    position: absolute;
    right: 0;
    bottom: 0;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    z-index: -1;
    object-fit: cover;
}

.content {
    text-align: center;
    background: rgba(0, 0, 0, 0.5);
    padding: 20px 40px;
    border-radius: 8px;
}