style.css

body{

background-color: gray;
}

h1{
  text-align: center;
  margin: 0 auto;
  text-transform: capitalize;
  color: #808080;
  font-size: 60px;
}

.log-in
{
  margin: 30px auto;
  width: 50rem;
  height: 37.5rem;
  background: #67BE4B;
  position: relative;
  border-radius: 10px;
}

.log-in form{
  background:#FFFFFF;
  width: 400px;
  height: 300px;
  margin: 50px auto;
  position: absolute;
  top: 10%;
  left: 25%;
  box-shadow: 6px 6px 20px #000;
  border-radius: 10px;
}

.log-in form .inp
{
  display: block;
  margin: 35px auto;
  padding: 15px 115px 15px 10px;
  background: #F2F2F2;
  border: none;
}

.log-in form input[type="checkbox"]
{
  margin:0 0 20px 55px;
}

.log-in form .lbl
{
  display: inline;
  color: #a08f8f;
  text-transform: capitalize;
}

.log-in form .btn
{
  display: block;
  margin: 0 auto;
  background: #00B242;
  color: #FFF;
  text-transform: capitalize;
  border: none;
  padding: 15px 125px;
}