* {
  text-align: center;
  font-family: 'Avenir','Helvetica Neue','Arial','Hiragino Sans', YuGothic, YuGothicM, san-serif;
}
a {
  text-decoration-line: none;
  font-size: 24px;
  color: #252525;
}
body {
  margin: 0 auto;
}
footer {
  width: 320px;
  bottom: -900px;
  text-align: center;
  margin-left: 0px; 
}
footer p {
  margin: 0;
}
li {
  list-style: none;
}
img {
  width: 200px;
  object-fit: cover;
}
ul {
  padding-left: 15px;
  position: relative;
  top: -10px;
}
header {
  height: 300px;
}
h1,
h2 {
  margin: 0 auto;
  font-size: 24px;
  color: #252525;
}
h1 {
  margin: 10px auto;
  padding: 20px 0 10px;
  position: relative;
  left: -8px;
}
h2{
  padding: 20px 0 0;
  margin-top: 2px;
  padding: 15px 0;
}
h3 {
  margin-top: 2px;
  padding: 15px 0;
  font-size: 20px;
}
p {
  font-size: 20px;
}
.container {
  width: 320px;
  margin: 0 auto;
}
.btn{
  font-size: 16px;
  width: 90px;
  display: block;
  float: center;
  text-align: center;
  border: 1px solid silver;
  background-color: white;
  border-radius: 4px;
  padding: 6px 5px;
  margin: 6px 1px 10px;
  box-shadow: 0px 0px 2px 1px #ccc;
}
.contents {
  display: inline-table;
  position: relative;
  top: -10px;
}

@media (min-width: 530px) {
  header {
    height: 200px;
  }
  h1,
  h2,
  h3 {
    width: 800px;
  }
  .container {
    width: 800px;
  }
  .btn{
    width: 110px;
    display: block;
    float: left;
    text-align: center;
    border: 1px solid silver;
    padding: 10px 25px;
    border-radius: 4px;
    margin: 6px 10px 20px;
  }
  footer {
    margin-left: 232px;
    bottom: -500px;
  }
}