style.css

body {
  background: #fff;
  padding: 0px;
  margin: 0px;
  font-family: 'Nunito', sans-serif;
  font-size: 16px;
  text-align: center;
}

.img-logo {
  width: 100px;
}

input, button {
  font-family: 'Nunito', sans-serif;
  font-weight: 700;
}

.main-div, .loggedin-div {
  width: 20%;
  margin: 0px auto;
  padding: 20px;
  display: none;
}

.main-div {
  margin-top: 50px;
}

.loggedin-div {
  margin-top: 10px;
}

.main-div input, .loggedin-div input {
  display: block;
  border: 1px solid #ccc;
  border-radius: 5px;
  background: #fff;
  padding: 15px;
  outline: none;
  width: 100%;
  margin-bottom: 20px;
  transition: 0.3s;
  -webkit-transition: 0.3s;
  -moz-transition: 0.3s;
}

.main-div input:focus {
  border: 1px solid #777;
}

.main-div button, .loggedin-div button {
  background: #F1F1F1;
  color: #000000;
  border: 1px solid #000000;
  border-radius: 5px;
  padding: 15px;
  display: block;
  margin-bottom: 20px;
  width: 100%;
  transition: 0.3s;
  -webkit-transition: 0.3s;
  -moz-transition: 0.3s;
}

.main-div button:hover, .loggedin-div button:hover {
  background: #3D3D3D;
  color: #fff;
  border: 1px solid #fff;
  cursor: pointer;
}