/* Ensure full height layout */
html, body {
  height: 100%;
  margin: 0;
  font-family: Arial, sans-serif;
}

.wrapper {
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

/* Push footer to the bottom */
.header, .footer {
  background-color: #f4f4f4;
  padding: 0px 0;
  text-align: center;
}

.container {
  flex: 1;
  padding: 20px;
  text-align: center;
}

.responsive-img {
  max-width: 100%;
  height: auto;
}