#js-billboard,
#js-billboard--sp {
  display: none;  /* 初期値：非表示 */
}

#js-billboard.is-closed,
#js-billboard--sp.is-closed  {
  display: none !important;
}

.billboard {
  box-sizing: border-box;
  position: fixed;
  right: 0;
  bottom: 0;
  z-index: 10000;
}

.billboard.billboard--sp {
  width: 100%;
  left: 0;
  right: auto;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  background-color: #fff;
  box-shadow: 0 -2px 5px rgba(0,0,0,0.12);
  text-align: center;
}

.billboard.billboard--signup {
  right: 13px;
}

.billboard__close-button {
  position: absolute;
  top: 5px;
  right: 5px;
  padding: 0.4em 0.5em;
  background-color: #333;
  border-radius: 50%;
  color: #fff;
  font-size: 0.75rem;
  line-height: 1;
  cursor: pointer;
}

.billboard__close-button.billboard__close-button--sp {
  top: -12px;
}

.billboard__close-button.billboard__close-button--signup {
  top: -10px;
  right: -9px
}

.billboard__anchor {
  display: block;
}

.billboard.billboard--sp .billboard__anchor {
  display: inline-block;
}

.billboard__banner {
  /* border: 2px solid #87de58; */
  vertical-align: bottom;
}

.billboard__banner:hover {
  opacity: 0.90 !important;
}

@media screen and (max-width: 640px) {
  .billboard__banner.billboard__banner--300x250 {
    width: 200px;
    height: auto;
  }
}