body {
  font-family: 'Noto Sans JP', 'Zen Maru Gothic';
  margin: 0;
  padding: 0;
}

body {
  background: #f3f3f3;
}
header {
  position: sticky;
  top: 0;
  z-index: 35;
}

/* 背景色 */
.bg_blue {
  background-color: #0084e7;
}
/* global-navigation */
#global-navigation a {
  font-weight: bold;
}
#global-navigation a:hover {
  background-color: #0084e7;
  color: #FFFFFF;
}

/* button */
a.btn {
  text-align: center;
  display: block;
  border-radius: 100vh;
  border: 3px solid #333333;
  background: #FFFFFF;
  margin: 0 auto;
  font-weight: bold;
  background: #FFFFFF;
}
a.btn.btn-black {
  background: #333333;
  color: #FFFFFF;
}
a.btn.btn-yellow {
  background: #ffd800;
  border: 2px solid #333333;
}
a.btn.btn-sm {
  width: 200px;
  line-height: 36px;
  padding: 0;
  font-size: 1.2rem;
  box-shadow: 0px 1px 0px var(--box-shadow-color);
}
a.btn.btn-lg {
  width: 300px;
  line-height: 36px;
  padding: 0;
  font-size: 1.2rem;
  box-shadow: 0px 4px 0px var(--box-shadow-color);
} 
@media screen and (max-width:768px) {
  a.btn.btn-lg {
    width: auto;
  } 
}