Remember to replace the picture to see the effect
filter:blur(20px);
Filter : vague (20px);
css:
body { min-height:100vh; box-sizing:border-box; margin:0; padding-top:calc(50
vh -6em); font:150%/1.6 Baskerville,Palatino,serif; } .bg_img h3 { font-size:18
px; color:#ffffff; } .bg_img p { font-size:14px; color:#ffffff;
font-variant-ligatures:common-ligatures discretionary-ligatures
historical-ligatures; } body,.bg_img::before { background:url("images/bg.jpg") 0
/ cover fixed; } .bg_img { position:relative; margin:0 auto; padding:1em;
max-width:23em; background:hsla(0,0%,100%,.25) border-box; overflow:hidden;
border-radius:.3em; box-shadow:0 0 0 1px hsla(0,0%,100%,.3) inset,0 .5em 1em
rgba(0,0,0,0.6); text-shadow:0 1px 1px hsla(0,0%,100%,.3); } .bg_img::before {
content:''; position:absolute; top:0; right:0; bottom:0; left:0; margin:-30px;
z-index:-1; -webkit-filter:blur(20px); filter:blur(20px); }
html:
<div class="bg_img"> <h3> The background is fuzzy </h3> <p>
Background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background fuzzy background </p> </
div>

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