pure CSS wave effect All In One
demos
SVG
<svg class="wave wave-bottom" width="4323" height="250" viewBox="0 0 4323 250" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M4323 149.091C4091.5 100.525 3848.5 186.994 3412 202.614C2750.36 226.291 2638.5 40.8657 2124.5 4.04682C1683.02 -27.5776 1127.5 135.797 721 159.38C314.504 182.963 0 128.418 0 128.418V250H4323C4323 250 4323 27.5687 4323 149.091Z"></path></svg>
codepen copy