style.css

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  background-color: #333;
  color: white;
}

.container {
  margin: 10px 15px;
}

img {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

h3 {
  margin-bottom: 15px;
  text-decoration: underline;
  text-align: center;
}

p {
  margin-bottom: 5px;
}

label {
  margin: 5px 0;
  display: inline-block;
}

input {
  height: 30px;
  outline: none;
  border: none;
  padding-left: 15px;
  border-radius: 50px;
}

button {
  width: 100%;
  margin: 20px 0 10px 0;
  height: 30px;
  border: none;
  cursor: pointer;
  font-size: 15px;
  background-color: rgb(43, 174, 255);
  border-radius: 50px;
  color: white;
}

button:hover {
  background-color: rgb(255, 63, 63);
  transition: 0.2s;
}

small {
  display: block;
  text-align: center;
  opacity: 75%;
}