styles.css

body {
  width: 100%;
  height: 100vh;
  margin: 0;
  background-color: #1b1b32;
  color: #f5f6f7;
  font-family: sans-serif;
  font-size: 16px;
}

main {
  max-width: 500px;
  min-width: 250px;
  width: 60vw;
  margin: 0 auto;
  padding-bottom: 2em;
}

h1,
p {
  text-align: center;
  margin: 1em auto;
}

p {
  font-style: italic;
}

form {
  border: 1px solid white;
  padding: 1em;
  background: rgba(255, 255, 255, 0.3);
}

fieldset {
  border: none;
}

label {
  display: block;
  margin: 0.5rem 0;
}

input,
textarea,
select {
  display: inline-block;
  width: 100%;
  margin: 10px 0 0 0;
  min-height: 2em;
}

.inline {
  display: inline;
  width: unset;
  margin: 0 0.5em 0 0;
  vertical-align: middle;
}

input[type='submit'] {
  display: block;
  width: 60%;
  margin: 1em auto;
  font-size: 1.1rem;
  min-width: 300px;
  background-color: #3b3b4f;
  color: white;
  border: 1px solid white;
  border-radius: 1em;
}