body {
  width: 100%;
  min-height: 100vh;
  margin: 0px;
  background-color: #f0f0f0;
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  font-size: 16px;
}

body, h5, h6, a {
  color: #424242;
}

h5, h6 {
  width: 100%;
  margin: 0px auto 10px;
  padding: 0px;
  font-weight: normal;
}

a img {
transition: opacity 0.5s ease 0s;
}

a:hover {
  font-style: italic;
}

a:hover img {
  opacity: 0.7;
}

h5, h6, div, dl {
  text-align: center;
}

.fontcolor1 {
  color: red;
}

.fontcolor2 {
  color: #76d6ff;
}

.flex {
  margin: 20px auto;
  width: 100%;
  display: flex;
  flex-flow: row wrap;
  justify-content: space-around;
  text-align: center;
}

.flex img {
}

#header {
  width: 100%;
  display: flex;
  flex-flow: row wrap;
  justify-content: space-between;
  align-items: center;
  background-color: #828282;
}

#header_left img {
  margin-left: 20px;
}

#header_right img {
  margin-right: 20px;
  margin-left: 20px;
}

#bkbtn {
  width: 100%;
  height: 40px;
  margin-bottom: 20px;
  text-align: right;
  overflow-y: hidden;
}

#bkbtn a {
  margin-right: 20px;
}

#rights {
  width: 100%;
  margin: auto;
  font-size: x-small;
  text-align: center;
}

#footer {
  position: sticky;
  top: 100vh;
  width: 100%;
  display: flex;
  flex-flow: row wrap;
  align-items: center;
  background-color: #828282;
  font-size: x-small;
  color: white;
}

#footer div {
  width: auto;
}

#footer-1 {
  flex: 1 1 298px;
}

#footer-2 {
  flex: 1 1 258px;
}

#footer-3 {
  flex: 1 1 135px;
}

#footer-4 {
  flex: 1 1 269px;
}

#booth {
  margin: 21px;
  width: auto;
box-shadow: 0px 0px 0px 21px white;
}

#kaizoku {
  width: auto;
}

.insta_link {
  box-sizing: border-box;
  margin: 0px auto 20px;
  max-width: 330px;
  border: 1px solid;
  border-collapse: collapse;
  font-size: smaller;
  background-color: white;
}

.insta_link td {
  border: 1px solid;
}

.border_newtopic {
  border: 2px solid red;
}