.form {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    background: #fff;
    width: 300px; 
    padding: 40px;
    box-shadow: 0 0 3px rgba(0, 0, 0, 0.3);
}
.form h2 {
    margin: 0 0 20px;
    line-height: 1;
    color: #6c757d;
    font-size: 18px;
    font-weight: 400;
}
.form input {
    outline: none;
    display: block;
    width: 100%;
    margin: 0 0 20px;
    padding: 10px 15px;
    border: 1px solid #ccc;
    color: #ccc; 
    box-sizing: border-box;
    font-size: 14px;
    font-weight: 400; 
    transition: 0.2s linear;
}
.form input:focus {
    color: #333;
    border: 1px solid #6c757d;
}
.form  .btn-signin{
    cursor: pointer;
    background: #6c757d;
    width: 100%;
    padding: 10px 15px;
    border: 0;
    color: #fff; 
    font-size: 14px;
    font-weight: 400;
}
.form button:hover {
    opacity:0.8;
}