body {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
    line-height: 1.8;
    font-family: sans-serif;
}

/* タイトル */

.site-title {
    display: flex;
    align-items: flex-end;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.site-title h1 {
    margin: 0;
    font-size: 2.6rem;
    font-weight: 700;
    line-height: 1;
}

.director {
    font-size: 1rem;
    color: #666;
    line-height: 1;
    padding-bottom: 0.15rem;
}

/* 見出し */

h2 {
    margin-top: 2rem;
}

/* 開設日 */

.note {
    color: #666;
}

/* 記事 */

article {
    margin-top: 3rem;
    padding-top: 1rem;
}

/* 日付 */

time {
    color: #666;
    font-size: 0.9rem;
}

/* リンク */

a {
    color: inherit;
}

/* 区切り線 */

hr {
    margin: 2rem 0;
}

/* 研究日誌一覧 */

.research-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.research-list li {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #ddd;
}

.research-no {
    display: block;
    font-size: 0.85rem;
    color: #666;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.research-list a {
    display: block;
    font-size: 1.15rem;
    line-height: 1.7;
    margin-bottom: 1rem;
    text-decoration: none;
    color: inherit;
}

.research-list a:hover {
    text-decoration: underline;
    color: #0066cc;
}

.research-list small {
    display: block;
    color: #666;
    font-size: 0.9rem;
}

/* 記事画像 */

.article-image{
    display:block;
    max-width:100%;
    height:auto;
    margin:30px auto;
}

/* 記事本文 */

article p{
    margin-bottom:1.5em;
}

.seed-box{
    max-width:700px;
    margin:0 auto 40px;
    border:1px solid #cfcfcf;
    background:#fafafa;
    padding:20px;
}

/* 入力欄 */

input,
textarea{
    box-sizing:border-box;
    font-size:18px;
    padding:10px;
    border:1px solid #bbb;
    border-radius:6px;
    background:#fff;
}

input{
    width:100%;
    max-width:350px;
}

textarea{
    width:100%;
    max-width:650px;
    height:100px;
}

/* ランダム出口 */

#exit-link{
  text-align:center;
  margin:80px 0 30px;
  font-size:0.95rem;
}

#exit-link a{
  text-decoration:none;
  color:#666;
}

#exit-link a:hover{
  opacity:0.7;
}

/* ==========================
   研究動画
========================== */

body {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
    line-height: 1.8;
    font-family: sans-serif;
}

/* タイトル */

.site-title {
    display: flex;
    align-items: flex-end;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.site-title h1 {
    margin: 0;
    font-size: 2.6rem;
    font-weight: 700;
    line-height: 1;
}

.director {
    font-size: 1rem;
    color: #666;
    line-height: 1;
    padding-bottom: 0.15rem;
}

/* 見出し */

h2 {
    margin-top: 2rem;
}

/* 開設日 */

.note {
    color: #666;
}

/* 記事 */

article {
    margin-top: 3rem;
    padding-top: 1rem;
}

/* 日付 */

time {
    color: #666;
    font-size: 0.9rem;
}

/* リンク */

a {
    color: inherit;
}

/* 区切り線 */

hr {
    margin: 2rem 0;
}

/* 研究日誌一覧 */

.research-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.research-list li {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #ddd;
}

.research-no {
    display: block;
    font-size: 0.85rem;
    color: #666;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.research-list a {
    display: block;
    font-size: 1.15rem;
    line-height: 1.7;
    margin-bottom: 1rem;
    text-decoration: none;
    color: inherit;
}

.research-list a:hover {
    text-decoration: underline;
    color: #0066cc;
}

.research-list small {
    display: block;
    color: #666;
    font-size: 0.9rem;
}

/* 記事画像 */

.article-image{
    display:block;
    max-width:100%;
    height:auto;
    margin:30px auto;
}

/* 記事本文 */

article p{
    margin-bottom:1.5em;
}

.seed-box{
    max-width:700px;
    margin:0 auto 40px;
    border:1px solid #cfcfcf;
    background:#fafafa;
    padding:20px;
}

/* 入力欄 */

input,
textarea{
    box-sizing:border-box;
    font-size:18px;
    padding:10px;
    border:1px solid #bbb;
    border-radius:6px;
    background:#fff;
}

input{
    width:100%;
    max-width:350px;
}

textarea{
    width:100%;
    max-width:650px;
    height:100px;
}

/* ランダム出口 */

#exit-link{
  text-align:center;
  margin:80px 0 30px;
  font-size:0.95rem;
}

#exit-link a{
  text-decoration:none;
  color:#666;
}

#exit-link a:hover{
  opacity:0.7;
}

/* ==========================
   研究動画
========================== */

.research-video{
    display: block;
    width: 100%;
    max-width: 500px;   /* 好みで480〜560pxに調整 */
    margin: 30px auto;
    border-radius: 8px;
}