* {
  box-sizing: border-box;
}
body {
  font-family: sans-serif;
  padding: 2rem;
  color: #404040;
  background-color: antiquewhite;
}
header {
  display: flex;
  align-items: center;
}
h1 {
  margin-left: 1rem;
}
header img {
  height: 65px;
}
input[type="text"] {
  margin-top: 0.3rem;
  width: 100%;
  max-width: 400px;
  border-radius: 0.5rem;
  border: 1px solid #aaa;
  padding: 0.4rem;
}
@media(min-width: 500px) {
  #mando {
    width: 200px;
  } 
}
#msg {
  margin-top: 1rem;
  color: #900;
}