body {
  font: 16px/1.6 Avenir, "Avenir Next", sans-serif;
  margin: 0;
  color: #444;
}

nav {
  display: flex;
  gap: 1.25rem;
  padding: 1rem 1.5rem;
  background: #10213a;
}

h1 {
  font-size: 6rem;
  font-weight: 400;
  margin-top: 100px;
  margin-bottom: 20px;
  line-height: .5;
}

h2 {
  font-weight: 400;
}

nav a {
  color: #cfd8e6;
  text-decoration: none;
}

nav a.active,
nav a:hover {
  color: #fff;
}

.subtitle {
  font-size: 2rem;
  color: #aaa;
  letter-spacing: 0.7em;
}

main {
  max-width: 640px;
  margin: 2rem auto;
  padding: 0 1rem;
}

form {
  display: grid;
  gap: 1rem;
}

label {
  display: grid;
  gap: .25rem;
  font-weight: 400;
}

input,
textarea,
button {
  font-family: inherit;
}

input,
textarea {
  font: inherit;
  padding: .5rem;
  border: 1px solid #bbb;
  border-radius: 6px;
  background: #f5f5f5;
}

input:focus,
textarea:focus {
  background: #fff;
}

.button,
button {
  background: #2b6cb0;
  color: #fff;
  border: 0;
  border-radius: 6px;
  padding: .6rem 1.2rem;
  font: inherit;
  cursor: pointer;
  text-decoration: none;
  justify-self: start;
  display: inline-block;
}

.notice {
  padding: .75rem;
  border-radius: 6px;
}

.ok {
  background: #e6f6ea;
}

.err {
  background: #fde8e8;
}

.hp {
  position: absolute;
  left: -9999px;
}

.accent {
  color: #88b;
}

.plain {
  color: inherit;
  text-decoration: none;
}