Kак прижать книзу все div?

Question

Lavrov95 @Lavrov95

HTML
CSS

Kак прижать книзу все div?

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="">
    <meta name="author" content="">
    <link rel="shortcut icon" href="facivon.ico">

    <title>Facebook like chat</title>
    <link href="style.css" rel="stylesheet">
    <script src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
    <script src="script.js"></script>
</head>
<body>

<div class="chat_box">
    <div class="chat_head"> Chat Box</div>
    <div class="chat_body">
        <div class="user"> Krishna Teja</div>
    </div>
</div>

<div class="msg_box" >

    <div class="msg_head">Krishna Teja
        <div class="close">x</div>
    </div>
    <div class="msg_wrap">
        <div class="msg_body">
            <div class="msg_a">This is from A</div>
            <div class="msg_b">This is from B, and its amazingly kool nah... i know it even i liked it :)</div>
            <div class="msg_a">Wow, Thats great to hear from you man</div>
            <div class="msg_push"></div>
        </div>
        <div class="msg_footer"><textarea class="msg_input" rows="4"></textarea></div>
    </div>
</div>

<div class="msg_box">

    <div class="msg_head">Krishna Teja
        <div class="close">x</div>
    </div>
    <div class="msg_wrap">
        <div class="msg_body">
            <div class="msg_a">This is from A</div>
            <div class="msg_b">This is from B, and its amazingly kool nah... i know it even i liked it :)</div>
            <div class="msg_a">Wow, Thats great to hear from you man</div>
            <div class="msg_push"></div>
        </div>
        <div class="msg_footer"><textarea class="msg_input" rows="4"></textarea></div>
    </div>
</div>
</body>
</html>

style.css

body{
    background:#16a085;
    margin:0px;
    font-family: sans-serif;
}

.chat_box{
    /*position:fixed;*/
    float: right;
    bottom:0px;
    width:250px;
}
.chat_body{
    background:white;
    height:400px;
    padding:5px 0px;
}

.chat_head,.msg_head{
    background:#f39c12;
    color:white;
    padding:15px;
    font-weight:bold;
    cursor:pointer;
    border-radius:5px 5px 0px 0px;
}

.msg_box{
    margin-right: 20px;
    float: right;
    bottom:-5px;
    width:250px;
    background:white;
    border-radius:5px 5px 0px 0px;
}

.msg_head{
    background:#3498db;
}

.msg_body{
    background:white;
    height:200px;
    font-size:12px;
    padding:15px;
    overflow:auto;
    overflow-x: hidden;
}
.msg_input{
    width:100%;
    border: 1px solid white;
    border-top:1px solid #DDDDDD;
    -webkit-box-sizing: border-box; /* Safari/Chrome, other WebKit */
    -moz-box-sizing: border-box;    /* Firefox, other Gecko */
    box-sizing: border-box;
}

.close{
    float:right;
    cursor:pointer;
}
.minimize{
    float:right;
    cursor:pointer;
    padding-right:5px;

}

.user{
    position:relative;
    padding:10px 30px;
}
.user:hover{
    background:#f8f8f8;
    cursor:pointer;

}
.user:before{
    content:'';
    position:absolute;
    background:#2ecc71;
    height:10px;
    width:10px;
    left:10px;
    top:15px;
    border-radius:6px;
}

.msg_a{
    position:relative;
    background:#FDE4CE;
    padding:10px;
    min-height:10px;
    margin-bottom:5px;
    margin-right:10px;
    border-radius:5px;
}
.msg_a:before{
    content:"";
    position:absolute;
    width:0px;
    height:0px;
    border: 10px solid;
    border-color: transparent #FDE4CE transparent transparent;
    left:-20px;
    top:7px;
}


.msg_b{
    background:#EEF2E7;
    padding:10px;
    min-height:15px;
    margin-bottom:5px;
    position:relative;
    margin-left:10px;
    border-radius:5px;
    word-wrap: break-word;
}
.msg_b:after{
    content:"";
    position:absolute;
    width:0px;
    height:0px;
    border: 10px solid;
    border-color: transparent transparent transparent #EEF2E7;
    right:-20px;
    top:7px;
}