footer{
 /*   border-top: 1px solid #8f8f8f;*/
    background-color: #ffd28d;
}

.footer-ul {
    display: flex;
    justify-content: center;
    padding-top: 30px;
}
.footer-ul>li{
    margin-bottom: initial;
    list-style: none;
}
.copyright{
    text-align: center;
    margin: 0px;
    color: #1c1c1c;
    padding-bottom: 10px;
}
.top-btn-container {
    text-align: center;
    margin: 30px 0px
}

.top-btn {
    display: inline-block;
    padding: 13px 25px;
    background-color: #fffffff7;
    color: #5f5f5f;
    text-decoration: none;
    font-weight: bold;
    border-radius: 10px;
    border: 1px solid #333;
}

.top-btn:hover {
    background-color: #cb82fc;
    transform: translateY(-2px);
}

  /* PC */
@media (min-width: 768px) {
  .footer-ul>li{
      padding: 8px 25px;
  }
}
/* スマホ */
@media (max-width: 767px) {
  footer{
      position: sticky;
      top: 100vh;
  }
  .footer-ul {
      display: flex;
      justify-content: center;
      flex-direction: column;
  }

  .footer-ul>li {
      text-align: center;
      margin-bottom: 10px;
  }

}