body {
        background-image: url('back_img4.jpg');
        background-repeat: no-repeat;
        background-attachment: fixed;
        background-size: cover;
        //background: #3b5998;
        font-size: 1.1em;
        font-family: sans-serif;
}
a {
        text-decoration: none;
}
form {
        width: 800px;
        margin: 70px auto;
        background: white;
        padding: 30px;
        border-radius: 3px;
        opacity: 0.9;
        border: 1px solid #dee3d7
        transition: all .3s;
        box-shadow: 7px 8px 10px rgba(0,0,0,.2);
}
h2.form-title {
        text-align: center;
}
input {
        display: block;
        box-sizing: border-box;
        width: 100%;
        padding: 8px;
}
form .form-group {
        margin: 10px auto;
}
form button {
        width: 100%;
        border: none;
        color: white;
        background: #3b5998;
        padding: 15px;
        border-radius: 5px;
}
.msg {
        margin: 5px auto;
        border-radius: 5px;
        border: 1px solid red;
        background: pink;
        text-align: left;
        color: brown;
        padding: 10px;
}
label {
        font-size:12px;
}