@charset "UTF-8";

html {
  font-size: 10px;
}

body {
  margin: 0;
  padding: 0;
  font-size: 1.6rem;
  font-family: "游ゴシック Medium", YuGothic,YuGothicM, "Hiragino Kaku Gothic ProN", "Hiragino Kaku Gothic Pro", メイリオ, Meiryo, sans-serif;
  text-align: justify;
  text-justify: inter-ideograph;
  color: #727171;
}

section, header, footer {
  width: 1000px;
  margin: 0 auto;
}

a {
  text-decoration: none;
}

a:link {
  color: blue;
}

a:visited {
  color: blue;
}

a:hover {
  color: red;
}

a:active {
  color: red;
}

a:hover img {
  filter: alpha(opacity=70);
  opacity: 0.7;
}

.no_mouse_over a:hover img, /* クラス単位でopacityを戻す */
a:hover img.no_mouse_over   /* 画像単位でopacityを戻す */
{
  filter: alpha(opacity=100);
  opacity: 1;
}

.flexBox {
  display: webkit-flex;
  display: flex;
  flex-wrap: wrap;
}

.circle {
  position: absolute;
  left: 0;
  right: 0;
  width: 128px;
  height: 128px;
  font-size: 2rem;
  font-weight: bold;
  text-align: center;
  background-color: white;
  padding-top: 44px;
  border-radius: 50%;
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.65);
  margin: auto;
  z-index: 1000;
}

.circle span {
  font-size: 1.2rem;
}

header nav a:link {
  color: #727171;
}

header nav a:visited {
  color: #727171;
}

header nav a:hover {
  color: #bbb;
}

header nav a:active {
  color: #bbb;
}

header nav ul {
  flex-wrap: nowrap;
  justify-content: space-around;
  font-size: 1.2rem;
  border-top: solid 1px #807f80;
  padding: 5px 60px;
  border-bottom: solid 1px #807f80;
  margin: 0;
}

header nav ul li {
  width: 20%;
  text-align: center;
  cursor: pointer;
}

header nav ul li a {
  display: block;
}

footer {
  text-align: center;
  color: black;
  line-height: 2;
}

footer a:link {
  color: black;
}

footer a:visited {
  color: black;
}

footer a:hover {
  color: black;
}

footer a:active {
  color: black;
}

footer p:first-child {
  margin: 50px 0 0;
}

footer .copyright {
  margin: 20px 0;
}