Common.css

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.info-box {
    background-color: #dcdee0;
    text-align: left; 
    font-size: 100%; 
    overflow:hidden; 
    border-collapse: inherit;
    margin: 0;
    padding: 1rem;
    width: 400px;
}

.info-box-outer {
    margin: 5px
}

.info-box-outer:before, .info-box-outer:after {
    content: "";
    display: block;
    background-color: black;
    height: 10px; }
.info-box-outer:before {
    clip-path: polygon(0px 10px, 100% 10px, calc(100% - 20px) 0px, calc(100% - 20px) 8px, 20px 8px, 20px 0px);
    -webkit-clip-path: polygon(0px 10px, 100% 10px, calc(100% - 20px) 0px, calc(100% - 20px) 8px, 20px 8px, 20px 0px); }
.info-box-outer:after {
    clip-path: polygon(20px 10px, 20px 2px, calc(100% - 20px) 2px, calc(100% - 20px) 10px, 100% 0px, 0px 0px);
    -webkit-clip-path: polygon(20px 10px, 20px 2px, calc(100% - 20px) 2px, calc(100% - 20px) 10px, 100% 0px, 0px 0px); }