main {
    max-width: 1200px;
    margin: 100px auto;
    padding: 0 50px;
}
@media screen and (max-width: 1024px) {
 main {
        margin: 60px auto 80px;
        padding: 0 20px;
    }

}
/* article */
.post {
    max-width: 900px;
    margin: 0 auto;
}
.postHead {
    margin-bottom: 30px;
}
.postMeta {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}
.postDate {
    color: #888;
        width: 80px;
    font-size: 1.4rem;
    flex-shrink: 0;
}
.postCat {
    font-size: 1.4rem;
    text-align: center;
    border: solid 1px var(--color01);
    border-radius: 3px;
    width: 110px;
    padding: 0 1em;
    color: var(--color01);
    flex-shrink: 0;
}
.postTtl {
    font-size: 3.6rem;
    font-weight: 600;
}
.postThumb {
    margin-bottom: 30px;
}
.postThumb img {
width: 100%;
}
.postContent {
    margin: 30px 0 60px;
}
.postContent {
  line-height: 1.8;
  font-size: 1.8rem;
}

.postContent h2,
.postContent h3,
.postContent h4 {
  margin-top: 2.5em;
  margin-bottom: 1em;
  font-weight: 600;
  line-height: 1.4;
}

.postContent h2 {
  font-size: 3rem;
}

.postContent h3 {
  font-size: 2.6rem;
  border-bottom: 2px solid #ccc;
  padding-bottom: 6px;
}

.postContent h4 {
  font-size: 2.2rem;
}

.postContent p {
  margin-bottom: 1.5em;
}

.postContent ul,
.postContent ol {
  margin-left: 1.5em;
  margin-bottom: 1.5em;
}

.postContent ul li::before {
  content: "・";
  margin-right: 0.5em;
  color: var(--color01);
}

.postContent a {
  text-decoration: underline;
}

.postContent a:hover {
  text-decoration: none;
  opacity: 0.8;
}

.postContent img {
  max-width: 100%;
  height: auto;
  margin: 1.5em 0;
}

.postContent table {
  width: 100%;
  border-collapse: collapse;
  margin: 2em 0;
  font-size: 1.8rem;
}

.postContent table th,
.postContent table td {
  border: 1px solid #ccc;
  padding: 10px;
  text-align: left;
}

.postContent table th {
  background: #f0f0f0;
  font-weight: 600;
}
@media screen and (max-width: 767px) {
    .postTtl {
        font-size: 2.6rem;
    }
    .postContent {
        font-size: 1.5rem;
    }
    .postContent h2 {
        font-size: 2.6rem;
    }
    .postContent h3 {
        font-size: 2.2rem;
    }
    .postContent h4 {
        font-size: 1.8rem;
    }
}