.main-container {
    width: 100%;
    height: 100vh;
     transition: 0.4s linear;
}

.box {
    width: 400px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    /*background: url('https://images.pexels.com/photos/176851/pexels-photo-176851.jpeg?w=1260&h=1000&auto=compress&cs=tinysrgb');*/
    background: #2b2b2b;

    padding: 40px;
    box-sizing: border-box;
    box-shadow: 0px 15px 25px rgba(0, 0, 0, .5);
    border-radius: 10px;
}

.box h2 {
    margin: 0 0 30px;
    padding: 0;
    color: #fff;
    text-align: center;
}

.box p {
    margin-bottom: 0;
}

.box p:nth-child(even) {
    margin-top: 0;
}

.box a {
    color: #9a9d9e;
    font-size: 14px;
    text-decoration: none;
}

.box .input-box {
    position: relative;
}

.box .input-box input {
    width: 100%;
    padding: 10px 0;
    font-size: 16px;
    margin-bottom: 30px;
    color: #fff;
    border: 1px solid #fff;
    border: none;
    border-bottom-style: solid;
    outline: none;
    letter-spacing: 1px;
    background: transparent;
}

.box .input-box label {
    position: absolute;
    color: #fff;
    top: 0;
    left: 0;
    padding: 10px 0;
    font-size: 16px;
    pointer-events: none;
    transition: .5s;
}

.box .input-box input:focus ~ label,
.box .input-box input:valid ~ label{
    top: -18px;
    left: 0;
    color: #03a9f4;
    font-size: 12px;
}

.box input[type=submit] {
    background: transparent;
    border: none;
    outline: none;
    background: #03a9f4;
    color: #fff;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 5px;
}

#logged-in {
    width: 100%;
    height: auto;
    text-align: center;
    margin: auto;
    position: absolute;
    top: 50px;
    display: none;
}

.login-true {
    opacity: 0;
}