如何在：focus上更改文本区域的边框颜色

请原谅我这是一个愚蠢的问题，但我需要帮助。我想重点更改TEXTAREA的边框颜色。但我的代码似乎无法正常工作。

请查看小提琴上的代码。

<form name = "myform" method = "post" action="insert.php"  onsubmit="return validateform()" style="width:40%">
        <input type="text" placeholder="Enter Name." name="name" maxlength="300" class="input">
        <input type="email" placeholder="Enter E-mail." name="address" maxlength="300" class="input">
        <textarea placeholder="Enter Message." name="descrip" class="input" ></textarea>    
<br>
<input class="button secondary" type=submit name="submit" value="Submit" >
</form>

这是CSS

.input {
border:0; 
padding:10px; 
font-size:1.3em; 
font-family:"Ubuntu Light","Ubuntu","Ubuntu Mono","Segoe Print","Segoe UI";
color:#ccc; 
border:solid 1px #ccc; 
margin:0 0 20px; 
width:300px;
-moz-box-shadow: inset 0 0 4px rgba(0,0,0,0.2); 
-webkit-box-shadow: inset 0 0 4px rgba(0, 0, 0, 0.2); 
box-shadow: inner 0 0 4px rgba(0, 0, 0, 0.2);
-webkit-border-radius: 3px; 
-moz-border-radius: 3px; 
border-radius: 3px;

}
input:focus { 
    outline: none !important;
    border-color: #719ECE;
    box-shadow: 0 0 10px #719ECE;
}