Modifying a toggleable menu - html

Question

Hello guys I have a login menu, that when you hit the element "log-in" it will drop down a loggin menu. The thing is that I can't move the log in box to the left.
The reason I want to do this is when the users use a smaller screen half of the box won't show up properly.
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Sample code below:
#login-dp{
min-width: 250px;
padding: 14px 14px 0;
overflow:hidden;
background-color:rgba(255,255,255,.8);
}
#login-dp .help-block{
font-size:12px
}
#login-dp .bottom{
background-color:rgba(255,255,255,.8);
border-top:1px solid #ddd;
clear:both;
padding:14px;
}
#login-dp .social-buttons{
margin:12px 0
}
#login-dp .social-buttons a{
width: 49%;
}
#login-dp .form-group {
margin-bottom: 10px;
}
.btn-fb{
color: #fff;
background-color:#3b5998;
}
.btn-fb:hover{
color: #fff;
background-color:#496ebc
}
.btn-tw{
color: #fff;
background-color:#55acee;
}
.btn-tw:hover{
color: #fff;
background-color:#59b5fa;
}
#media(max-width:768px){
#login-dp{
background-color: inherit;
color: #fff;
}
#login-dp .bottom{
background-color: inherit;
border-top:0 none;
}
}
<li class="dropdown">
<b>Login</b> <span class="caret"></span>
<ul id="login-dp" class="dropdown-menu">
<li>
<div class="row">
<div class="col-md-12">
Login via
<div class="social-buttons">
<i class="fa fa-facebook"></i> Facebook
<i class="fa fa-twitter"></i> Twitter
</div>
or
<form class="form" role="form" method="post" action="login" accept-charset="UTF-8" id="login-nav">
<div class="form-group">
<label class="sr-only" for="exampleInputEmail2">Email address</label>
<input type="email" class="form-control" id="exampleInputEmail2" placeholder="Email address" required>
</div>
<div class="form-group">
<label class="sr-only" for="exampleInputPassword2">Password</label>
<input type="password" class="form-control" id="exampleInputPassword2" placeholder="Password" required>
<div class="help-block text-right">Forget the password ?</div>
</div>
<div class="form-group">
<button type="submit" class="btn btn-primary btn-block">Sign in</button>
</div>
<div class="checkbox">
<label>
<input type="checkbox"> keep me logged-in
</label>
</div>
</form>
</div>
<div class="bottom text-center">
New here ? <b>Join Us</b>
</div>
</div>
</li>
</ul>
</li>
</ul>