.container {
  margin: 30px auto;
  width: 90vw;
  max-width: 600px;
  box-shadow: 0px 4px 4px 4px rgba(0, 0, 0, 0.05);
  border-radius: 10px;
  padding: 10px;
}

h1 {
  text-align: center;
}

.row-input {
  width: 100%;
  margin-bottom: 10px;
  height: 30px;
  border-radius: 4px;
}

#message {
  height: 100px;
}

button {
  background-color: green;
  color: white;
  border-radius: 5px;
  width: 100%;
  height: 30px;
}

input:focus, textarea:focus {
  border-color: black;
}

input:invalid, select:invalid, textarea:invalid {
  border-color: red;
}

input:valid, select:valid, textarea:valid {
  border-color: green;
}

button:hover {
  background-color: black;
}

.radio-group input[type="radio"]:checked {
  border-color: green;
  background-color: green;
  box-shadow: 0 0 4px 4px white;
}

.radio-group input[type="radio"]:checked + label {
    color: green;
}

input:first-of-type {
  border-radius: 8px;
}