html, body {
    height: 100%;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background: transparent;
    overflow: hidden;
}

.container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: flex-end;
    padding: 20px;
    box-sizing: border-box;
}

.title {
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    font-size: 24px;
}

@media screen and (min-aspect-ratio: 16/9) {
    .container {
        width: 100%;
        height: 56.25vw; /* 100 / 16 * 9 = 56.25 */
    }
}

@media screen and (max-aspect-ratio: 16/9) {
    .container {
        width: 177.78vh; /* 100 / 9 * 16 = 177.78 */
        height: 100%;
    }
}