* {
    padding: 0;
    margin: 0;
    border: none;
    outline: none;
}
body{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 10px;
    padding: 10px;
    -webkit-user-select: none;
    -moz-user-select: none;   
    -ms-user-select: none;     
    user-select: none;        
}
p {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: 20px;
}
video {
    width: 100%;
    height: auto;
    cursor: pointer;
    background-color: dimgray;
}

body > div {
    box-sizing: border-box;
    overflow: hidden;
    display: flex;
    gap: 5px;
    flex-direction: column;
}
div button {
    position: absolute;
    right: 5px;
    bottom: 5px;
    z-index: 1;
}

.full-screen {
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
    overflow: auto;
}
.full-screen video {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    background-color: black;
}