.main-block {
  margin-top: 40px;
  display: flex;
}

.column-container {
  width: 250px;
}

.current-column {
  background-color: #143270;
  border: 1px solid #143270;
  color: #ffffff;
  text-align: center;
  padding: 20px;
  font-size: 18px;
  font-weight: bold;
}

.column-list {
  text-align: center;
  border: 1px solid #143270;
}

.column-item {
  margin: 15px;
}

.column-item.selected {
  color: #143270;
  font-weight: bold;
}

.article-container {
  flex: 1;
  margin-left: 40px;
}

.breed-bar {
  padding-bottom: 20px;
  border-bottom: 1px solid #000000;
}

.article-list {
  margin-top: 20px;
}

.article-item {
  display: flex;
  margin: 15px 0;
  padding-bottom: 15px;
  border-bottom: 1px dotted #D8D8D8;
  align-items: center;
}

.article-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 300px;
  flex: 1;
  font-size: 18px;
  font-weight: bold;
}

.article-date {
  color: #999999;
}

@media screen and (max-width: 800px) {
  .main-block {
    flex-direction: column;
  }

  .column-container {
    width: inherit;
  }

  .current-column {
    padding: 0;
    background-color: transparent;
    color: #143270;
    border: none;
    font-size: 22px;
    font-weight: normal;
  }

  .column-list {
    display: none;
  }

  .article-container {
    margin-top: 20px;
    margin-left: 0;
    padding: 0 20px;
  }

  .article-list {

  }

  .article-item {
    border-bottom: none;
    flex-direction: column;
    align-items: flex-start;
    margin: 10px;
    background-color: #fff;
    box-shadow: 0px 0px 8px 0px rgba(0, 0, 0, 0.16);
    padding: 20px;
    margin-top: 20px;
    overflow: hidden;
  }

  .article-title {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 100%;
  }

  .article-date {
    margin-top: 10px;
  }

  .article-date::before {
    
  }
}

@media screen and (max-width: 500px) { 
  .article-title {
    font-size: 14px;
  }
}