style.css

* {
  margin: 0px;
  padding: 0px;
}
body {
  font-size: 12px;
  background: rgb(247, 247, 247);
  font-family: Arial, Helvetica, sans-serif;
}

.header {
  width: 40vh;
  margin: 50px auto 0px;
  color: rgb(255, 255, 255);
  background: #5F9EA0;
  text-align: center;
  border: 1px solid #B0C4DE;
  border-bottom: none;
  border-radius: 10px 10px 0px 0px;
  padding: 20px;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}
form, .content {
  width: 40vh;
  margin: 0px auto;
  padding: 20px;
  border: 1px solid #B0C4DE;
  background: rgb(247, 247, 247);
  border-radius: 0px 0px 10px 10px;
  /* height: 70vh; */
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}
.input-group {
  margin: 10px 0px 10px 0px;
  height: 8vh;
}
.input-group label {
  display: block;
  text-align: left;
  margin: 3px;
}
.input-group input {
  height: 3vh;
  width: 93%;
  padding: 5px 10px;
  font-size: 16px;
  border-radius: 5px;
  border: 1px solid gray;
}
.input-group input:hover {
  border: 2px solid rgb(0, 151, 151);
}
.btn {
  padding: 10px;
  font-size: 15px;
  color: white;
  background: #5F9EA0;
  border: none;
  border-radius: 5px;
}
.error {
  width: 92%; 
  margin: 0px auto; 
  padding: 10px; 
  border: 1px solid #a94442; 
  color: #a94442; 
  background: #f2dede; 
  border-radius: 5px; 
  text-align: left;
}
.success {
  color: #3c763d; 
  background: #dff0d8; 
  border: 1px solid #3c763d;
  margin-bottom: 20px;
}