Using CSS masks to fadeout content

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.fadeout-horizontal {
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  mask-image: linear-gradient(
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    to right,
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    transparent,
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    black var(--fade-size, 5rem),
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    black calc(100% - var(--fade-size, 5rem)),
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    transparent
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  );
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}
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.fadeout-vertical {
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  mask-image: linear-gradient(
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    to bottom,
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    transparent,
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    black var(--fade-size, 5rem),
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    black calc(100% - var(--fade-size, 5rem)),
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    transparent
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  );
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}
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.fadeout-left {
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  mask-image: linear-gradient(
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    to right,
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    transparent,
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    black var(--fade-size, 5rem)
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  );
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}
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.fadeout-right {
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  mask-image: linear-gradient(
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    to left,
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    transparent,
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    black var(--fade-size, 5rem)
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  );
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}
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.fadeout-top {
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  mask-image: linear-gradient(
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    to bottom,
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    transparent,
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    black var(--fade-size, 5rem)
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  );
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}
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.fadeout-bottom {
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  mask-image: linear-gradient(
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    to top,
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    transparent,
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    black var(--fade-size, 5rem)
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  );
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}
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.fadeout-circular {
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  mask-image: radial-gradient(
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    circle,
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    black calc(100% - var(--fade-size, 5rem)),
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    transparent
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  );
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}