Left aligned CSS chat bubble

by someprimetime

HTML

<div id="container">
<div id="outer">
    <div id="inner">Content here</div>
    <div class="left_arrow"></div>
    <div class="left_arrow_bg"></div>
</div>
</div>

CSS

body {
    background-color: #333;
    margin: 20px;
}

#container {
    background: rgba(255,255,255,0.5);
    border-radius: 10px;
    padding:10px;
    float:left;
}

#outer {
    border-radius: 5px;
    float:left;
    display: block;
    background: #aacce1;
    height: 100%;
    width: 100%;
    position: relative;
}

#inner {
    border-radius: 2px;
    margin: 10px;
    padding: 5px;
}

.left_arrow {
    border-top: 10px solid transparent, 20px solid transparent;
    border-bottom: 10px solid transparent, 20px solid transparent;
    border-right: 10px solid #aacce1, 20px solid transparent
    height: 0;
    width: 0;
    position: absolute;
    top: 10px;
    left: -10px;
}
.left_arrow_bg {
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    border-right: 10px solid rgba(255,255,255,0.5);
    height: 0;
    width: 0;
    position: absolute;
    top: 10px;
    left: -20px;
}