.note {
    position: relative;
    padding: 1em 1.5em;
    margin: 2em auto;
    color: #fff;
    background: #97C02F;
    overflow: hidden;
}

.note:before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    border-width: 0 16px 16px 0;
    border-style: solid;
    border-color: #fff #fff #658E15 #658E15;
    background: #658E15;
    -webkit-box-shadow: 0 1px 1px rgba(0,0,0,0.3), -1px 1px 1px rgba(0,0,0,0.2);
    -moz-box-shadow: 0 1px 1px rgba(0,0,0,0.3), -1px 1px 1px rgba(0,0,0,0.2);
    box-shadow: 0 1px 1px rgba(0,0,0,0.3), -1px 1px 1px rgba(0,0,0,0.2);
    /* Firefox 3.0 damage limitation */
    display: block; width: 0;
}

.note.rounded {
    -moz-border-radius: 5px 0 5px 5px;
    border-radius: 5px 0 5px 5px;
}

.note.rounded:before {
    border-width: 8px;
    border-color: #fff #fff transparent transparent;
    -moz-border-radius: 0 0 0 5px;
    border-radius: 0 0 0 5px;
}