:root {
  --bs-border-color: #198754;
}
.navbar {
  --bs-navbar-color: #198754;
  --bs-navbar-hover-color: #198754;
}
html, body {
  height: 100%;
}
body {
  margin-bottom: 60px;
  font-size: 1rem;
  height: 100vh;
}

label {
  font-weight: 600;
  font-size: 1.1rem;
  display: block;
}

.navbar h1, .navbar h2 {
  font-size: 1.5rem;
  margin-bottom: 0;
}

.navbar .tagline {
  display: block;
  font-size: 1rem;
  margin-top: 5px;
  font-weight: 500;
  line-height: 1.2;
}
.nav-item a:hover {
  text-decoration: underline;
}
#letters {
  margin-top: .5em;
  display: flex;
  justify-content: space-between;
}
#letters input {
  margin: 0;
  height: 3rem;
  text-align: center;
  width: 9%;
  font-size: 1rem;
  padding: 0;
}

footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 60px;
  line-height: 60px;
  font-size: 80%;
  background-color: #f5f5f5;
}