/* body {
  padding: 50px;
  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
} */

a {
  color: #00b7ff;
}
body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  background: linear-gradient(to right, #b92b27, #1565c0);
}

@keyframes pulse {
  0% {
    background-color: #001f3f;
  }
  100% {
    background-color: #ff4136;
  }
}

.card {
  margin-bottom: 20px;
  border: none;
  transition: 3s;
  animation: pulse 5s infinite;
}

.box {
  width: 500px;
  padding: 40px;
  position: absolute;
  top: 10%;
  left: 30%;
  background: #191919;
  text-align: center;
  transition: 0.25s;
  margin-top: 100px;
}

.box input[type="text"],
.box input[type="password"] {
  border: 0;
  background: none;
  display: block;
  margin: 20px auto;
  text-align: center;
  border: 2px solid #3498db;
  padding: 10px 10px;
  width: 250px;
  outline: none;
  color: white;
  border-radius: 24px;
  transition: 1s;
}

.box h1 {
  color: white;
  text-transform: uppercase;
  font-weight: 500;
}

.box input[type="submit"]:hover {
  background: #2ecc71;
}