body {
  margin: 0;
  box-sizing: border-box;
}

/* CSS for header */

header {
  text-align: center;
  margin-top: 10px;
}

h1 {
  font-size: 30px;
  font-weight: bold;
  color: #4b6c73;
  padding: 20px;
}

img {
  max-width: 100%;
}

main {
  margin-top: 10px;
  border-top: 2px solid #4b6c73;
  min-height: 20vh;
  text-align: center;
}

audio {
  padding: 20px;
}

footer {
  text-align: center;
  margin-top: 20px;
}

@media (max-width:800px) {
  header>img {
    max-width: 350px;
  }

  footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;

    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px 0;
    background: transparent;
    z-index: -1;
  }

}