* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: -apple-system, Roboto, sans-serif;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background-color: #4285f4;
  padding: 20px;
}

.wrapper {
  max-width: 500px;
  background-color: #ffffff;
  border-radius: 5px;
  padding: 20px;
}

header h1 {
  font-weight: normal;
  margin-bottom: 10px;
}

header p {
  font-size: 1.125rem;
}

form input {
  width: 100%;
  margin-block: 20px;
  padding: 10px;
  font-size: 1rem;
  color: #141414;
  outline: none;
  border: 2px solid #ededed;
  border-radius: 5px;
}

form input:focus {
  border-color: #80bae0;
}

form button {
  opacity: 0.7;
  width: 100%;
  border: none;
  padding: 10px;
  background-color: #4285f4;
  color: #ffffff;
  font-size: 1rem;
  text-transform: uppercase;
  font-weight: bold;
  border-radius: 5px;
  cursor: pointer;
  pointer-events: none;
}

form input:valid ~ button {
  opacity: 1;
  pointer-events: auto;
}