* {
    box-sizing: border-box;
    }

    *:focus {
        outline: none;
    }
    body {
    font-family: Arial;
    background-color: #3498DB;
    padding: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    }
    .login {
    margin: 20px auto;
    width: 300px;
    }
    .login-screen {
    background-color: #FFF;
    padding: 20px;
    border-radius: 10px
    }

    .app-title {
    text-align: center;
    color: #777;
    }

    .login-form {
    text-align: center;
    }
    .control-group {
    margin-bottom: 10px;
    }

    input {
    text-align: center;
    background-color: #ECF0F1;
    border: 2px solid transparent;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 200;
    padding: 10px 0;
    width: 250px;
    transition: border .5s;
    }

    input:focus {
    border: 2px solid #3498DB;
    box-shadow: none;
    }

    .btn {
        border: 2px solid transparent;
        background: #3498DB;
        color: #ffffff;
        font-size: 16px;
        line-height: 25px;
        padding: 10px 0;
        text-decoration: none;
        text-shadow: none;
        border-radius: 10px;
        box-shadow: none;
        transition: 0.25s;
        display: block;
        width: 250px;
        margin: 0 auto;
    }

    .btn:hover {
        background-color: #2980B9;
    }

    .login-link {
        font-size: 12px;
        color: #444;
        display: block;
        margin-top: 12px;
    }