html, body {
     margin: 0;
     width: 100%;
     height: 100%;
     font-family: sans-serif;
}

h1 {
     position: absolute;
     top: 50%;
     left: 50%;
     transform: translate(-50%, -50%);
     font-family: Poppins;
     text-transform: uppercase;
     color: #fff;
     text-align: center;
     font-weight: 600;
     font-size: 16px;
     letter-spacing: 30px;
}

@media only screen and (max-width: 768px) {
     h1 {
          font-size: 12px;
          letter-spacing: 4px;
     }
}



.login-box{
    width: 320px;
    height: 370px;
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    top: 50%;
    left: 50%;
    position: absolute;
    transform: translate(-50%,-50%);
    box-sizing: border-box;
    padding: 70px 30px;
}
.avatar{
    width: 100px;
    height: 100px;
    border-radius: 50%;
    position: absolute;
    top: -50px;
    left: calc(50% - 50px);
}
h1{
    margin: 0;
    padding: 0 0 20px;
    text-align: center;
    font-size: 22px;
}
.login-box p{
    margin: 0;
    padding: 0;
    font-weight: bold;
}
.login-box input{
    width: 100%;
    margin-bottom: 20px;
}
.login-box input[type="text"], input[type="password"]
{
    border: none;
    border-bottom: 1px solid #fff;
    background: transparent;
    outline: none;
    height: 40px;
    color: #fff;
    font-size: 16px;
}

#register-link, #index-link
{
    border: none;
    outline: none;
    height: 40px;
    color: #fff;
    font-size: 18px;
}

#register-link:hover, #index-link:hover
{
    border: none;
    outline: none;
    height: 40px;
    color: lightblue;
    font-size: 18px;
}

.login-box input[type="submit"]
{
    border: none;
    outline: none;
    height: 40px;
    background: #1c8adb;
    color: #fff;
    font-size: 18px;
    border-radius: 20px;
}
.login-box input[type="submit"]:hover
{
    cursor: pointer;
    background: lightblue;
    color: #000;
}

.login-box a{
    text-decoration: none;
    font-size: 14px;
    color: #fff;
}
.login-box a:hover
{
    color: #39dc79;
}