grepp
.browser-mockup {
border-top: 2em solid #48758A;
position: relative;
border-radius: 10px 3px 0 0
}
.browser-mockup:before {
display: block;
position: absolute;
content: '';
top: -1.25em;
left: 1em;
width: 0.5em;
height: 0.5em;
border-radius: 50%;
background-color: #f44;
}
.browser-mockup.with-tab:after {
display: block;
position: absolute;
content: '';
width: 20%;
height: 0em;
border-bottom: 2em solid white;
border-left: 0.8em solid transparent;
border-right: 0.8em solid transparent;
}