html {
  background-color: white;
}

html, body, p, img, div,a{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  height: 100vh;
  position: relative;
  display: flex;
  flex-direction: column;
}

.member__center {
  position: absolute;
  top:1.5em;
  right: 6em;
  z-index:100;
  background-color: #ffae00e5;
  color: white;
  padding: 1em 2em;
  text-decoration: none;
  border-radius: 2em;
  font-weight: bold;
  line-height: 1em;
  font-size: 1.2em;
  transition: background-color 0.3s ease;
}

.member__center:hover {
  background-color: #ffaf04;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

#mainbody{
  background-image: url('images/background.png');
  background-size: cover;
  background-position: center;
  flex: 1;
  margin: 0;
  padding: 0;
  line-height:0;
  /* height: cal(100vh - 100px); */
}

#mainbody img{
  height: 100%;
  object-fit: cover;
  display: block;
}

div.footer {
  flex: 0 0 150px;
  text-align: center;
  font-weight: bold;
  line-height: 2em;
  /* height: 150px; */
  background: linear-gradient(90deg, rgba(137, 188, 241, 1) 0%, rgba(231, 245, 255, 1) 100%);
  display: flex;
  justify-content: center;
  align-items: center;
}