@font-face {
  font-family: "MurechoSub";
  src: url("/parts/murecho-600.woff2") format("woff2");
  font-weight: 600;
  font-display: swap;
}

:root {
  --bg: #f5f6f1;
  --card: #ffffff;
  --ink: #2a2b25;
  --sub: #63665a;
  --line: #dfe2d6;
  --olive: #55652f;
  --olive-pale: #e6ebd7;
  --sky: #cfe4f1;
  --sky-mid: #8dbcdb;
  --sky-deep: #3f7da6;
  --sky-ink: #24506e;
  --radius: 12px;
  --head: "MurechoSub", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "YuGothic", "Meiryo", sans-serif;
  --text: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic Medium", "YuGothic", "Meiryo", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--text);
  font-size: 1rem;
  line-height: 1.95;
  overflow-wrap: anywhere;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--olive); text-underline-offset: 0.2em; }
a:hover { color: var(--ink); }
a:focus-visible { outline: 2px solid var(--sky-deep); outline-offset: 2px; border-radius: 4px; }

h1, h2, h3 { font-family: var(--head); font-weight: 600; line-height: 1.5; }

#skip {
  position: absolute;
  left: -9999px;
  top: 8px;
  background: var(--card);
  color: var(--ink);
  padding: 8px 12px;
  z-index: 10;
}
#skip:focus { left: 8px; }

/* ---------- ヘッダー：左オリーブ／右空色の2色 ---------- */

#masthead {
  background: linear-gradient(90deg, var(--olive) 0 50%, var(--sky) 50% 100%);
}
#mh-in {
  max-width: 1040px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
}
#mh-title {
  margin: 0;
  font-family: var(--head);
  font-weight: 600;
  line-height: 1.5;
  padding: 30px 32px 30px 16px;
  background: var(--olive);
}
#mh-title a { color: #fff; text-decoration: none; display: block; }
#mh-name { display: block; font-size: 1.65rem; letter-spacing: 0.02em; }
#mh-sub { display: block; margin-top: 4px; font-size: 0.86rem; color: #e3e9d0; }
#mh-catch {
  margin: 0;
  padding: 30px 16px 30px 36px;
  background: var(--sky);
  color: var(--sky-ink);
  font-family: var(--head);
  font-weight: 600;
  font-size: 1.12rem;
  align-self: stretch;
  display: flex;
  align-items: center;
}

/* ---------- 2カラム：左サイドバー＋メイン ---------- */

#frame {
  max-width: 1040px;
  margin: 36px auto 56px;
  padding: 0 16px;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  grid-template-areas: "side main";
  gap: 40px;
  align-items: start;
}
#main { grid-area: main; max-width: 720px; min-width: 0; }
#sidebar { grid-area: side; display: grid; gap: 20px; }

/* ---------- サイドバー ---------- */

#sidebar > section,
#sidebar > nav {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
}
#sidebar h2 { margin: 0 0 8px; font-size: 1rem; color: var(--olive); }
#about p { margin: 0 0 8px; font-size: 0.88rem; line-height: 1.85; color: var(--sub); }
#about p:first-of-type { color: var(--ink); font-weight: 700; }
#about p:last-child { margin-bottom: 0; }
#side-posts ul { list-style: none; margin: 0; padding: 0; }
#side-posts li { position: relative; padding: 7px 0 7px 18px; font-size: 0.88rem; line-height: 1.65; }
#side-posts li + li { border-top: 1px solid var(--line); }
#side-posts li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.95em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--sky-mid);
}
#side-posts a { color: var(--ink); text-decoration: none; }
#side-posts a:hover { color: var(--olive); text-decoration: underline; }
#side-posts a[aria-current="page"] { color: var(--olive); font-weight: 700; }

/* ---------- TOP：1列のフィード ---------- */

#feed article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 28px 26px;
  margin-bottom: 28px;
}
#feed time { font-size: 0.84rem; color: var(--sub); }
#feed h2 { margin: 2px 0 14px; font-size: 1.32rem; }
#feed h2 a { color: var(--ink); text-decoration: none; }
#feed h2 a:hover { color: var(--olive); text-decoration: underline; }
#feed img {
  width: 100%;
  max-width: 640px;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius);
}
#feed p {
  margin: 14px 0 10px;
  font-size: 0.95rem;
  color: var(--sub);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
#feed article > a:last-child { font-weight: 700; font-size: 0.95rem; }

/* ---------- パンくず ---------- */

#crumbs ol {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: var(--sub);
  line-height: 1.7;
}
#crumbs li + li::before { content: "|"; margin: 0 0.7em; color: #a9ae9a; }

/* ---------- 記事ページ ---------- */

#entry h1 { margin: 0 0 20px; font-size: 1.6rem; }
#eyecatch { position: relative; margin: 0 0 28px; max-width: 640px; }
#eyecatch img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; border-radius: var(--radius); }
#eyecatch figcaption {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--sky-deep);
  color: #fff;
  font-size: 0.8rem;
  line-height: 1.6;
  padding: 3px 10px;
  border-radius: 8px;
}

#toc {
  background: var(--sky);
  border-radius: var(--radius);
  padding: 20px 26px 22px;
  margin-bottom: 36px;
}
#toc-h { margin: 0 0 8px; font-family: var(--head); font-weight: 600; color: var(--sky-ink); }
#toc ul { list-style: none; margin: 0; padding: 0; font-size: 0.92rem; line-height: 1.7; }
#toc > ul > li { position: relative; padding: 4px 0 4px 1.5em; }
#toc > ul > li::before { content: "→"; position: absolute; left: 0; top: 4px; color: var(--olive); font-weight: 700; }
#toc li ul { padding: 2px 0 0 0.2em; font-size: 0.86rem; }
#toc li li { position: relative; padding: 2px 0 2px 1.1em; }
#toc li li::before { content: "-"; position: absolute; left: 0; color: var(--sub); }
#toc a { color: var(--ink); text-decoration: none; }
#toc a:hover { color: var(--olive); text-decoration: underline; }

#body h2 {
  margin: 2.4em 0 1em;
  padding-bottom: 0.45em;
  font-size: 1.32rem;
  background:
    linear-gradient(var(--sky-mid), var(--sky-mid)) left bottom / 56px 6px no-repeat,
    linear-gradient(var(--olive), var(--olive)) left bottom / 100% 2px no-repeat;
  scroll-margin-top: 16px;
}
#body h3 {
  position: relative;
  margin: 1.9em 0 0.6em;
  padding-left: 1.2em;
  font-size: 1.1rem;
  scroll-margin-top: 16px;
}
#body h3::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.6em;
  width: 8px;
  height: 8px;
  background: var(--olive);
  transform: rotate(45deg);
}
#body p { margin: 0 0 1.3em; }
#body > h2:first-child { margin-top: 0; }

#pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 48px 0 0;
}
#pager a {
  display: flex;
  gap: 12px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.86rem;
  line-height: 1.6;
}
#pager a:hover { border-color: var(--olive); }
#pager a[rel="next"] { grid-column: 2; }
#pager img { width: 96px; height: 64px; object-fit: cover; border-radius: 8px; flex: none; }
#pager small { display: block; color: var(--olive); font-weight: 700; }

#related { margin-top: 40px; }
#related h2 { margin: 0 0 12px; font-size: 1.15rem; }
#related ul {
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
#related li + li { border-top: 1px solid var(--line); }
#related a { display: block; padding: 12px 18px; color: var(--ink); text-decoration: none; line-height: 1.65; }
#related a:hover span { color: var(--olive); text-decoration: underline; }
#related time { display: block; font-size: 0.78rem; color: var(--sub); }

/* ---------- プライバシーポリシー・404 ---------- */

#paper,
#missing {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 32px;
}
#paper h1,
#missing h1 { margin: 0 0 20px; font-size: 1.5rem; }
#paper #body h2 { font-size: 1.12rem; margin-top: 2em; }
#paper #body > h2:first-child { margin-top: 0; }
#enacted { margin: 28px 0 0; text-align: right; font-size: 0.9rem; color: var(--sub); }
#missing p { margin: 0 0 1em; }
#missing p:last-child { margin: 0; font-weight: 700; }

/* ---------- フッター ---------- */

#colophon { background: var(--olive); color: #fff; }
#ft-in { max-width: 1040px; margin: 0 auto; padding: 28px 16px 24px; }
#ft-links { list-style: none; margin: 0 0 12px; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 24px; font-size: 0.92rem; }
#ft-links a { color: #fff; }
#ft-links a:hover { color: var(--sky); }
#ft-note { margin: 0 0 14px; font-size: 0.84rem; line-height: 1.85; color: #eef1e2; max-width: 760px; }
#ft-sign { margin: 0; font-size: 0.78rem; color: #d6ddc0; }

/* ---------- 幅900px未満：1カラム（サイドバーは下へ） ---------- */

@media (max-width: 899px) {
  #masthead { background: none; }
  #mh-in { display: block; }
  #mh-title { padding: 18px 16px 16px; }
  #mh-name { font-size: 1.35rem; }
  #mh-catch { padding: 10px 16px; font-size: 0.98rem; }
  #frame {
    display: block;
    margin: 20px auto 40px;
  }
  #main { max-width: 720px; margin: 0 auto; }
  #sidebar { max-width: 720px; margin: 40px auto 0; }
}

@media (max-width: 600px) {
  body { line-height: 1.9; }
  #feed article { padding: 18px 16px 20px; }
  #feed h2 { font-size: 1.16rem; }
  #entry h1 { font-size: 1.32rem; }
  #toc { padding: 16px 18px 18px; }
  #body h2 { font-size: 1.18rem; }
  #body h3 { font-size: 1.04rem; }
  #pager { grid-template-columns: 1fr; }
  #pager a[rel="next"] { grid-column: auto; }
  #paper, #missing { padding: 22px 18px; }
}