body {
  margin: 3rem 1%;
  padding-bottom: 3rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

h1 {
  font-size: 1.5em;
  line-height: 2em;
  padding: .5em;
  max-height: 2em;
  overflow-y: auto;
  background: #ddd;
  border: 1px solid #000;
}

ul li {
  margin-bottom: 1rem;
}

#errorMsg {
  color: gray;
}

#form {
  background: rgba(0, 0, 0, 0.15);
  padding: 0.25rem;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  height: 3rem;
  box-sizing: border-box;
  backdrop-filter: blur(10px);
}

#input {
  border: none;
  padding: 0 1rem;
  flex-grow: 1;
  border-radius: 2rem;
  margin: 0.25rem;
}

#input:focus {
  outline: none;
}

#form > button {
  border: none;
  padding: 0 1rem;
  margin: 0.25rem;
  border-radius: 3px;
  outline: none;
}

#messages {
  list-style-type: none;
  margin: 0 10px;
  padding: 0;
}

#messages > li {
  padding: 0.5rem 1rem;
}

#messages > li:nth-child(odd) {
  background: #efefef;
}