html, body {
  height: 100%;
  margin: 0;
}

body {
  display: flex;
  flex-direction: column;
  font-family: Arial, sans-serif;
  text-align: center;
  background-color: #f4f4f4;
}

.container {
  flex: 1;
  background: white;
  border-radius: 10px;
  box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
  display: inline-block;
  margin: 1rem 1rem 0 1rem;
}

.logo {
  margin: 1rem;
  max-width: 100%;
  height: auto;
}

@media (max-width: 600px) {
  .logo {
    width: 80%;
  }
}

@media (min-width: 601px) and (max-width: 1200px) {
  .logo {
    width: 40%;
  }
}

@media (min-width: 1201px) {
  .logo {
    width: 30%;
  }
}

button {
  margin: 2rem;
  padding: 1rem 2rem;
  font-size: 1rem;
  cursor: pointer;
}

footer {
  background-color: black;
  color:#f4f4f4;
  text-align: center;
  margin: 0 1rem 0 1rem;
}