body {
  margin:0px;
  padding:0px;
  font-family: sans-serif;
  background: #739cb8;
   
}
 
.box {
  width: 280px;
  padding: 30px;
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius:20px;
  transform: translate(-50%,-50%);
  background: #191919;
  text-align: center;
   
}
.box h1 {
  color: white;
  text-transform: uppercase;
  font-weight: 500;
}
 
.text-input {
  border:0;
  background: none;
  display: block;
  margin: 20px auto;
  text-align: center;
  border: 2px solid #3498db;
  padding: 14px 10px;
  width: 200px;
  outline: none;
  color: white;
  border-radius: 25px;
  transition: 0.25s;
}
 
 
.text-input:focus {
  width: 250px;
  border-color: #2ecc71;
}
 
.box input[type="submit"] {
  border: 0;
  background: none;
  display: block;
  margin: 20px auto;
  text-align: center;
  border: 2px solid #2ecc71;
  padding: 14px 40px;
  outline: none;
  color: white;
  border-radius: 25px;
  transition: 0.25s;
  cursor: pointer;
}
 
.box input[type="submit"]:hover {
  background: #2ecc71;
}