.topicslist {
  border-collapse: collapse;
}

.topicslist td {
  box-sizing: border-box;
}

@media screen and (max-width: 640px) {
  .topicslist {
    width: 100%;
  }
  
  .topicslist td {
    display: block;
    width: 100%;
    border-bottom: none;
    padding-bottom: 5px;
  }
}

/** ボタンエリア */
.buttonarea {
  margin: 0 auto;
  text-align: center;
  padding: 2em 0;
}

.buttonarea a {
  background: #EDEDED;
  border-radius: 50px;
  position: relative;
  display: flex;
  justify-content: space-around;
  align-items: center;
  margin: 0 auto;
  max-width: 260px;
  padding: 10px 25px;
  color: #333333;
  transition: 0.3s ease-in-out;
  font-weight: 500;
}

.buttonarea a:after {
  position: absolute;
  top: 50%;
  right: 20px;
  border-radius: 1px;
  transition: 0.2s ease-in-out;
  font-weight: 900;
  transform: translateY(-50%);
}

.buttonarea a:hover {
  background: #2B2C2E;
  color: #FFFFFF;
  text-decoration: none;
}