html, body {
  height: 100%;
  padding: 0;
  margin: 0;
}
body {
  display: grid;
  justify-items: center;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr 11fr;
}

nav {
  grid-row: 1;
  grid-column: 1;
  z-index: 1000;
  background-color: rgba(100, 165, 65, 0.5);
  width: 100%;
  position: sticky;
  top: 0;
}

a.navbar-brand {
  color: rgb(100, 20, 20);
  font-weight: bold;
}

a.nav-link {
  color: black;
}

div.body {
  grid-column: 1;
  grid-row: 3;
  display: flex;
  align-items: flex-start;
  flex-direction: column;
}

div.body > div:first-child {
  text-align: center;
  width: 100%;
}

h2 {
  font-size: 1.5em;
  margin-bottom: 20px;
  text-align: center;
}

.form-group {
  margin-bottom: 15px;
}

.form-control {
  width: 300px;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-sizing: border-box;
}

.btn.btn-primary {
  border: 3px solid black;
  display: inline-block;
  padding: 10px 20px;
  font-size: 1.5em;
  font-weight: bold;
  text-align: center;
  text-decoration: none;
  background-color: rgba(50, 85, 30, .5);
  border-radius: 5px;
  cursor: pointer;
  color: black;
}

.mt-3 {
  margin-top: 1rem;
  text-align: center;
}

.alert {
  padding: 15px;
  background-color: red;
  color: white;
  border-radius: 5px;
  text-align: center;
}

.alert-danger {
  background-color: #f8d7da;
  color: #721c24;
  border-color: #f5c6cb;
}

svg {
  width: 100%;
  height: auto;
  max-height: 50vh;
}