nutty-tools/now-playing/themes/simple/style.css

:root {
    --border-radius: 10px;
}

#main-wrapper {
    width: 500px;
    display: flex;
    flex-direction: row;
    align-items: stretch;
    opacity: 0;
}

#yet-another-wrapper-yup {
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.75em;
    transition: all 0.25s ease-in-out;
}

#album-art-container {
    /* 1. Tell it to maintain a 1:1 square ratio */
    height: 150%;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    border-radius: var(--border-radius);
    position: relative;
    background-size: cover;
    background-position: center;
    display: var(--show-album-art);
    flex-shrink: 0;
}

#album-art-layer,
#album-art-transition-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: opacity 0.5s ease;
}

#album-art-layer {
    z-index: 1;
	transition: all 0.5s ease;
}

#album-art-transition-layer {
    z-index: 0;
}

#song-info-container {
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    flex-grow: 1;
    min-width: 0;
}

#background-transition-layer {
	z-index: 0;
}

/* The content sits on top */
#song-info-wrapper {
    position: relative; /* Keeps it in the document flow */
    z-index: 2;         /* Sits above the background-layer */
    
    padding: 1em 1.75em;
    display: flex;
    flex-direction: column;
    gap: 0.3em;
}

#track-label {
	font-size: 1em;
	font-weight: 600;
    text-align: var(--text-alignment);
}

#artist-label {
	font-size: 0.8em;
	font-weight: 400;
	opacity: 0.6;
    text-align: var(--text-alignment);
}

#progress-container {
	font-size: 0.6em;
	font-weight: 400;
	opacity: 0.6;
    text-align: var(--text-alignment);
    margin-top: 0.5em;
}

.text-label {
	white-space: nowrap;
    overflow: hidden;
    mask-image: var(--trailing-fade);
    -webkit-mask-image: var(--trailing-fade);
    transition: opacity 0.25s ease-in-out;
}