* {
  box-sizing: border-box;
}

*:focus {
  outline: none;
}
body {
  font-family: Arial;
  background-color: #8fda52;
  background-image: linear-gradient(to right, cyan, yellow);
  padding: 50px;
}
.login {
  margin: 20px auto;
  width: 300px;
}
.login-screen {
  background-color: #fff;
  padding: 20px;
  border-radius: 5px;
}

.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: 3px;
  font-size: 16px;
  font-weight: 200;
  padding: 10px 0;
  width: 250px;
  transition: border 0.5s;
}

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: 3px;
  box-shadow: none;
  transition: 0.25s;
  display: block;
  width: 250px;
  margin: 0 auto;
}

.btn:hover {
  background-color: #2980b9;
}

.loadingscreen {
  width: 750px;
  height: 230px;
  background-color: rgba(0, 0, 0, 0.6);
  margin: 0 auto;
  padding: 80px;
  text-align: center;
  color: #fff;
  border-radius: 25px;
  border: 2px solid #f0f0f0;
}

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

.sk-cube-grid {
  width: 40px;
  height: 40px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.sk-cube-grid .sk-cube {
  width: 33%;
  height: 33%;
  background-color: #fff;
  float: left;
  -webkit-animation: sk-cubeGridScaleDelay 1.3s infinite ease-in-out;
  animation: sk-cubeGridScaleDelay 1.3s infinite ease-in-out;
}
.sk-cube-grid .sk-cube1 {
  -webkit-animation-delay: 0.2s;
  animation-delay: 0.2s;
}
.sk-cube-grid .sk-cube2 {
  -webkit-animation-delay: 0.3s;
  animation-delay: 0.3s;
}
.sk-cube-grid .sk-cube3 {
  -webkit-animation-delay: 0.4s;
  animation-delay: 0.4s;
}
.sk-cube-grid .sk-cube4 {
  -webkit-animation-delay: 0.1s;
  animation-delay: 0.1s;
}
.sk-cube-grid .sk-cube5 {
  -webkit-animation-delay: 0.2s;
  animation-delay: 0.2s;
}
.sk-cube-grid .sk-cube6 {
  -webkit-animation-delay: 0.3s;
  animation-delay: 0.3s;
}
.sk-cube-grid .sk-cube7 {
  -webkit-animation-delay: 0s;
  animation-delay: 0s;
}
.sk-cube-grid .sk-cube8 {
  -webkit-animation-delay: 0.1s;
  animation-delay: 0.1s;
}
.sk-cube-grid .sk-cube9 {
  -webkit-animation-delay: 0.2s;
  animation-delay: 0.2s;
}

@-webkit-keyframes sk-cubeGridScaleDelay {
  0%,
  70%,
  100% {
    -webkit-transform: scale3D(1, 1, 1);
    transform: scale3D(1, 1, 1);
  }
  35% {
    -webkit-transform: scale3D(0, 0, 1);
    transform: scale3D(0, 0, 1);
  }
}

@keyframes sk-cubeGridScaleDelay {
  0%,
  70%,
  100% {
    -webkit-transform: scale3D(1, 1, 1);
    transform: scale3D(1, 1, 1);
  }
  35% {
    -webkit-transform: scale3D(0, 0, 1);
    transform: scale3D(0, 0, 1);
  }
}