#blog-title{
    margin-top: 3rem;
    margin-bottom: 3rem;
    padding-top: 1rem;
    padding-bottom: 1rem;
    border-top: dashed #000;
    border-bottom: dashed #000;
}

#blog-title h2{
    margin-top: 0;
}

h3{
    margin-top: 2rem;
}

h4{
    margin-top: 2rem;
    font-size: 1.3rem;
}

#main-contents p{
    margin-top: 0.5rem;
}

/* 横並び */

.flex {
    display: flex; /*横並び*/
  }
  .flex .image {
    width: 320px; /*画像サイズ指定*/
    margin: 0;
    padding: 0;
    overflow: hidden;
    position: relative;
  }
  .flex .text {
    margin: 0 0 0 20px;
    padding: 0;
  }