body {
    background-color: #f0f0f0;
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

h1, h2, h3 {
    margin: 0;
}

header {
    text-align: center;
    color: rgb(4, 121, 156);
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin: 20px;
    max-width: 800px;
}

header>.left, header>.right {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

header > .left {
    width: 300px;
}

video {
    display: block;
    margin: 20px auto;
    width: 100%;
    max-width: 800px;
    background-color: rgba(4, 121, 156);
}

video::-webkit-media-controls-play-button,
video::-webkit-media-controls-volume-slider {
    background-color: rgba(4, 121, 156, 55);
}

video::-webkit-media-controls-current-time-display,
video::-webkit-media-controls-time-remaining-display {
    color: #fff;
}

@media screen and (max-width: 500px) {
    header {
        flex-direction: column; /* Change to column layout on screens below 500px */
        text-align: center;
    }
}