:root {
  --main-color: #0029ae;
  --bg-color: #fafaf7;
  --line-color: #ccd3e8;
}

body {
  background-color: var(--bg-color);
  font-family: 'Yu Mincho', '游明朝', 'MS Mincho', 'MS PMincho', serif;
  color: var(--main-color);
  margin: 20px auto;
  max-width: 700px;
  padding: 0 10px;
  line-height: 1.6;
}

/* 各ページの上に置く、トップへ戻る道とメモの切り替え */
.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--line-color);
  margin-bottom: 1.5rem;
}

.top-nav a {
  text-decoration: none;
}

.top-nav a:hover {
  text-decoration: underline;
}

.memo-switch {
  margin-top: 0.6rem;
  font-size: 0.95rem;
}

.memo-switch span {
  margin: 0 0.8rem;
  cursor: pointer;
}

.memo-switch .here {
  font-weight: bold;
  border-bottom: 2px solid var(--main-color);
}

header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.visitor-counter {
  font-size: 0.8rem;
  opacity: 0.8;
  margin-top: 0.5rem;
}

.visitor-counter img {
  vertical-align: middle;
}

h1 {
  margin: 0;
  font-size: 2rem;
  color: var(--main-color);
}

h2 {
  color: var(--main-color);
}

a {
  color: var(--main-color);
}

nav {
  text-align: center;
  margin-top: 2rem;
}

nav a {
  text-decoration: none;
  color: var(--main-color);
  margin: 0 1rem;
}

nav a:hover {
  text-decoration: underline;
}

/* トップページ: 最新ブログ */
article {
  padding: 1rem 0;
  margin-bottom: 1rem;
}

article h2 {
  margin: 0 0 0.3rem;
  font-size: 1.2rem;
}

article .date {
  font-size: 0.8rem;
  margin-bottom: 0.6rem;
  opacity: 0.8;
}

article .article-title,
.log-view .entry .article-title {
  font-size: 1.5rem;
  opacity: 1;
  margin-left: 1rem;
  border-bottom: 1px solid var(--main-color);
  padding-bottom: 0.1rem;
}

article p {
  margin: 0;
  line-height: 1.5;
}

.section-title {
  font-size: 1rem;
  border-bottom: 1px solid var(--main-color);
  padding-bottom: 0.3rem;
  margin: 2rem 0 1rem;
}

.recent-list {
  list-style: none;
  padding-left: 0;
}

.recent-list li {
  margin: 0.6rem 0;
  font-size: 0.95rem;
}

.recent-list .date {
  font-size: 0.8rem;
  opacity: 0.8;
  margin-right: 0.5rem;
}

.more-link {
  text-align: right;
  margin-top: 0.5rem;
}

/* コメント */
.comment-list {
  margin-bottom: 1.5rem;
}

.comment-entry {
  border-bottom: 1px solid var(--line-color);
  padding: 0.6rem 0;
}

.comment-entry .comment-name {
  font-weight: bold;
  font-size: 0.9rem;
}

.comment-entry .comment-date {
  font-weight: normal;
  font-size: 0.75rem;
  opacity: 0.7;
  margin-left: 0.6rem;
}

.comment-entry .comment-message {
  margin-top: 0.2rem;
  line-height: 1.5;
  white-space: pre-wrap;
}

.comment-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.comment-form input,
.comment-form textarea,
.comment-form button {
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--main-color);
  border: 1px solid var(--line-color);
  background: var(--bg-color);
  padding: 0.5rem;
}

.comment-form textarea {
  min-height: 5rem;
  resize: vertical;
}

.comment-form button {
  cursor: pointer;
  align-self: flex-start;
  padding: 0.4rem 1.5rem;
}

/* 過去ログ: 左にログの列、中央に選んだ記事 */
.log-layout {
  display: flex;
  gap: 2rem;
  align-items: stretch;
  min-height: 16rem;
  border-top: 1px solid var(--line-color);
  border-bottom: 1px solid var(--line-color);
  padding: 1rem 0;
}

.log-list {
  flex: 0 0 13rem;
  border-right: 1px solid var(--line-color);
  padding-right: 1rem;
  font-size: 0.85rem;
  display: flex;
  gap: 1.2rem;
  align-items: flex-start;
}

.log-column {
  min-width: 3.5rem;
}

.log-choice {
  cursor: pointer;
  opacity: 0.85;
  margin-bottom: 0.35rem;
  white-space: nowrap;
}

.log-choice:hover {
  text-decoration: underline;
}

.log-choice.here {
  font-weight: bold;
  opacity: 1;
}

.log-view {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.log-view .entry {
  border: 1px solid var(--line-color);
  padding: 1.5rem 2rem;
  text-align: center;
  min-width: 60%;
}

.log-view .entry-title {
  font-size: 1.5rem;
  border-bottom: 1px solid var(--main-color);
  padding-bottom: 0.2rem;
  margin: 0 auto;
  width: fit-content;
}

.log-view .entry .date {
  font-size: 0.8rem;
  opacity: 0.8;
  margin: 0.6rem 0 1.4rem;
}

.log-view .entry p {
  line-height: 1.6;
}

@media (max-width: 480px) {
  .log-layout {
    flex-direction: column;
  }
  .log-list {
    flex: none;
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--line-color);
    padding-right: 0;
    padding-bottom: 0.8rem;
  }
}

/* キーワードメモ(画面幅に応じて3〜5列くらいに自動で折り返す) */
.keyword-list {
  list-style: none;
  padding-left: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 0.6rem 1.5rem;
  align-items: start;
}

.keyword-list li {
  margin: 0;
  text-align: center;
}

.keyword-list a {
  text-decoration: none;
  font-size: 1.1rem;
}

.keyword-list a:hover {
  text-decoration: underline;
}

.keyword-list li.locked {
  color: #999999;
  font-size: 1.1rem;
  cursor: default;
}

.keyword-list a {
  text-decoration: underline;
}

/* メモを開いているあいだ、後ろの一覧は薄く退く */
#memo-index.behind {
  opacity: 0.25;
  pointer-events: none;
}

/* 解禁されたメモを押すと出てくる、一枚の画面。
   後ろの一覧が見えたままになるよう、真ん中に浮かべる */
.memo-page {
  position: fixed;
  inset: 0;
  margin: auto;
  width: min(26rem, 76vw, 68vh);
  height: min(26rem, 76vw, 68vh);
  overflow-y: auto;
  background-color: var(--bg-color);
  border: 1px solid var(--line-color);
  padding: 1rem 1.2rem 1.5rem;
}

.memo-back {
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.memo-back a {
  text-decoration: none;
}

.memo-word {
  font-size: 1.3rem;
  text-align: center;
  margin-bottom: 1.5rem;
}

.memo-body {
  line-height: 1.9;
  white-space: pre-wrap;
}

.keyword-count {
  font-size: 0.85rem;
  opacity: 0.8;
  margin-bottom: 1rem;
  text-align: center;
}

/* プロフィール */
.profile-box {
  border: 1px solid var(--line-color);
  padding: 1rem 1.2rem;
  margin: 1.5rem 0;
}

.profile-box dt {
  font-weight: bold;
  margin-top: 0.6rem;
}

.profile-box dt:first-child {
  margin-top: 0;
}

.profile-box dd {
  margin: 0.2rem 0 0;
}