* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

header {
  background-color: #202c33;
  color: white;
  padding: 15px;
  font-size: 1.5rem;
  font-weight: bold;
  text-align: center;
  border-bottom: 1px solid #2a3942;
}

#container {
  display: flex;
  height: 100vh;
  width: 100%;
}

#usuarios {
  width: 35%;
  background-color: #111b21;
  border-right: 1px solid #2a3942;
}

#conversa {
  width: 65%;
  background-color: #222e35;
  display: flex;
  flex-direction: column;
}