body, html {
    height: 100%; /*distancia */
}

body {
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    background: #FDFEFE;   /*#2f3542*/
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    /* No Scrollbar */
    overflow: hidden;
}

.form-box {
    /*formulario*/
    width: 400px;
    padding: 50px;
    background: #FDFEFE; /*#191919;*/
    text-align: center; 
    border: 2px solid #;
    border-radius: 24px;
    border: 2px solid #4CAF50;*/
}

.form-title {
    color: #1E8449; /*#52BE80;#fff; colo del titulo *//
    text-transform: uppercase;
    font-weight: 500;
}

.form-box input[type="text"], .form-box input[type="password"], .form-box button[type="submit"] {
    border: 0;
    background: transparent;
    display: block;
    margin: 20px auto;
    text-align: center;
    border: 2px solid #1E8449; /*#3742fa;*/
    padding: 14px 10px;
    width: 350px;
    outline: none;
    color: black; /*white;*/
    border-radius: 24px;
    transition: 0.25s;
}

.form-box input[type="text"]:focus, .form-box input[type="password"]:focus,  {
    width: 280px;
    border-color: black; /*#ffffff;*/
}

.form-box button[type="submit"] {
    border: 0;
    background: #5352ed;
    display: block;
    margin: 20px auto;
    text-align: center;
    border: 2px solid #3742fa;
    padding: 14px 40px;
    outline: none;
    color: white;
    border-radius: 24px;
    transition: 0.25s;
    cursor: pointer;
}

.form-box button[type="submit"]:hover {
    background:  #4CAF50; /*none;*/
    border: 2px solid #4CAF50;
}

.form-box .avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  position: absolute;
  top: -50px;
  left: calc(50% - 50px);
}
/*https://www.youtube.com/watch?v=7wFzIVXZUxg*/