body > div {
  padding: 30px;
}

#list {
  list-style: none;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
}

#list li {
  flex-grow: 1;
  flex-basis: 270px;
  vertical-align: top;
  min-width: 270px;
  max-width: 270px;
  min-height: 350px;
  display: inline-block;
  padding: 20px;
  box-sizing: border-box;

}

#list li .wrap {
  display: flex;
  position: relative;
  justify-content: space-around;
  flex-direction: column;
  padding: 12px;
  width: 100%;
  height: 100%;
  border: 1px solid #ccc;
  border-radius: 5px;
  box-sizing: border-box;
}

#list li .wrap .date {
  color: #797070;
  position: absolute;
  display: inline-block;
  text-align: right;
  bottom: 10px;
  right: 10px;
}


#list li h3 {
  text-align: center;
}

@media screen and (max-width: 400px) {
  #list li {
    min-width: 100%;
    max-width: 100%;
  }
}