/*
  Designed by instan <https://instan.fc2.page>
  003 — snow shadow（クリーム紙 + 藍紫の影 + Hina Mincho × Italiana）
  ライト固定（藍紫の影は雪の上に落ちる色なのでダーク反転は意図しない）
*/

/* ===== カラー・フォントの設定（ここを変えると全体の見た目が変わります） ===== */
:root {
  color-scheme: light only;

  /* 色（クリーム紙 + 墨 + 雪に落ちる藍紫の影） */
  --color-bg: #f1e8cf;
  --color-bg-soft: #e9dfc2;
  --color-text: #1c1813;
  --color-muted: #534838;
  --color-faint: #8c8273;
  --color-line: #cfc4a8;
  --color-shadow: #a6a9b3;
  --color-shadow-tint: rgba(166, 169, 179, 0.18);
  --color-hl: rgba(166, 169, 179, 0.55);

  /* フォント */
  --font-serif-ja: "Hina Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-serif-en: "Cormorant Garamond", "EB Garamond", serif;
  --font-display: "Italiana", "Cormorant Garamond", serif;
  --font-body: var(--font-serif-ja);

  /* レイアウト */
  --content-width: 640px;
  --reading-width: 36rem;
  --header-height: 56px;
}

/* Scroll-driven animation 用の registered custom properties */
@property --header-bg-alpha {
  syntax: "<number>";
  inherits: false;
  initial-value: 0;
}

/* ===== 文字まわりの基本設定 ===== */
html {
  font-feature-settings:
    "palt" 1,
    "pkna" 1;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 2;
  word-break: auto-phrase;
  line-break: strict;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* ページ全体に薄く落ちる藍紫のヴェール（雪原の影） */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 60% at 50% 0%, transparent 0%, var(--color-shadow-tint) 80%),
    radial-gradient(80% 50% at 100% 80%, var(--color-shadow-tint) 0%, transparent 70%),
    radial-gradient(60% 40% at 0% 60%, var(--color-shadow-tint) 0%, transparent 70%);
  z-index: -1;
}

::selection {
  background: var(--color-text);
  color: var(--color-bg);
}

a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--color-line);
  transition:
    border-color 0.2s,
    color 0.2s;
}

a:hover {
  border-bottom-color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 400;
  line-height: 1.5;
  text-wrap: balance;
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.2rem);
  margin: 2.5rem 0 1.25rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--color-line);
  letter-spacing: 0.06em;
}

h2 {
  font-size: 1.35rem;
  margin: 2.25rem 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--color-line);
  letter-spacing: 0.06em;
}

h3 {
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 1.15rem;
  margin: 2rem 0 0.75rem;
  color: var(--color-muted);
}

h4 {
  font-size: 1rem;
  margin: 1.75rem 0 0.6rem;
  letter-spacing: 0.08em;
}

h5 {
  font-size: 0.92rem;
  margin: 1.5rem 0 0.5rem;
  color: var(--color-muted);
  letter-spacing: 0.14em;
}

h6 {
  font-family: var(--font-serif-en);
  font-size: 0.75rem;
  margin: 1.25rem 0 0.4rem;
  color: var(--color-faint);
  text-transform: uppercase;
  letter-spacing: 0.24em;
}

p + p {
  margin-top: 1em;
}

/* ===== 強調 / 引用 / 区切り / コード ===== */
em {
  font-family: var(--font-serif-en);
  font-style: italic;
  color: var(--color-text);
}

strong {
  background: linear-gradient(
    transparent 62%,
    var(--color-hl) 62%,
    var(--color-hl) 92%,
    transparent 92%
  );
  padding: 0 0.04em;
}

mark {
  background: transparent;
  color: inherit;
  border-bottom: 1px dotted var(--color-text);
  padding: 0 0.04em;
}

blockquote {
  margin: 1.6em 0;
  padding: 18px 22px;
  background: var(--color-shadow-tint);
  color: var(--color-text);
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 0.95rem;
  line-height: 1.85;
  border-left: 1px solid var(--color-shadow);
}

blockquote cite {
  display: block;
  margin-top: 10px;
  font-style: normal;
  font-family: var(--font-serif-en);
  font-size: 0.7rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--color-muted);
}

ul {
  margin: 1em 0;
  padding-left: 1.75em;
  list-style: disc;
}

ol {
  margin: 1em 0;
  padding-left: 1.75em;
  list-style: decimal;
}

dl {
  margin: 1em 0;
}

dt {
  margin-top: 0.75em;
  color: var(--color-text);
}

dd {
  margin-left: 1.5em;
}

table {
  width: 100%;
  margin: 1.5em 0;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  padding: 0.5em 0.75em;
  border-bottom: 1px solid var(--color-line);
  text-align: left;
}

th {
  color: var(--color-muted);
}

hr {
  border: 0;
  border-top: 1px solid var(--color-line);
  margin: 2em 0;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.88em;
  background: color-mix(in oklab, var(--color-text) 7%, transparent);
  padding: 0.1em 0.3em;
  border-radius: 2px;
}

pre {
  margin: 1.5em 0;
  padding: 1em;
  background: color-mix(in oklab, var(--color-text) 5%, transparent);
  border-radius: 2px;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.6;
}

pre code {
  background: transparent;
  padding: 0;
}

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

/* ===== フォーム要素 ===== */
label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 0.3em;
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="email"],
input[type="search"],
input[type="url"],
input[type="tel"],
textarea,
select {
  -webkit-appearance: none;
  border: 1px solid var(--color-line);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 0.5rem;
  border-radius: 0;
}

textarea {
  width: 100%;
  min-height: 4rem;
  margin: 0.5rem 0;
  resize: vertical;
}

select {
  padding-right: 1.75rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23534838' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
}

button,
input[type="button"],
input[type="submit"],
input[type="reset"] {
  -webkit-appearance: none;
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-line);
  padding: 0.5rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  cursor: pointer;
  touch-action: manipulation;
  letter-spacing: 0.05em;
}

button:hover,
input[type="button"]:hover,
input[type="submit"]:hover,
input[type="reset"]:hover {
  border-color: var(--color-muted);
}

.form-actions {
  display: block;
  text-align: center;
}

/* ===== 画面上部の固定ヘッダー（サイト名 + メニュー） ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  height: var(--header-height);
  border-bottom: 1px solid transparent;
  background: color-mix(in oklab, var(--color-bg) calc(var(--header-bg-alpha) * 100%), transparent);
}

@supports (animation-timeline: scroll()) {
  .site-header {
    animation: header-solidify linear both;
    animation-timeline: scroll(root);
    animation-range: 0 80px;
  }

  @keyframes header-solidify {
    from {
      --header-bg-alpha: 0;
      border-bottom-color: transparent;
    }
    to {
      --header-bg-alpha: 1;
      border-bottom-color: var(--color-line);
    }
  }
}

/* JS fallback (main.js が .scrolled クラスを付与) */
.site-header.scrolled {
  --header-bg-alpha: 1;
  border-bottom-color: var(--color-line);
}

.site-header-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  height: 100%;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--color-text);
  letter-spacing: 0.18em;
  border: 0;
}

/* ===== ナビゲーション =====
   1 つの <nav class="site-nav"> をリンク編集の唯一の場所として運用する。
   SP では .drawer を popover + transform: translateX で右からスライドインするドロワー化、
   PC では .drawer を display: contents でフラット化してヘッダー内インラインにする。 */

/* SP: ハンバーガーで開くドロワー（デフォルト挙動） */
.drawer {
  --drawer-width: min(20rem, 80dvw);
  position: fixed;
  inset: 0 0 0 auto;
  width: var(--drawer-width);
  height: 100dvh;
  margin: 0;
  padding: 0;
  border: 0;
  background: var(--color-bg);
  border-left: 1px solid var(--color-line);
  box-shadow: -8px 0 24px -12px rgba(0, 0, 0, 0.2);
  color: var(--color-text);
  overflow: hidden;
  transform: translateX(105%);
  transition:
    transform 0.28s cubic-bezier(0.3, 0.7, 0.3, 1),
    display 0.28s allow-discrete,
    overlay 0.28s allow-discrete;
}

.drawer:popover-open {
  transform: translateX(0);
}

@starting-style {
  .drawer:popover-open {
    transform: translateX(105%);
  }
}

.drawer::backdrop {
  background: rgba(28, 24, 19, 0.45);
  opacity: 0;
  transition:
    opacity 0.28s ease,
    display 0.28s allow-discrete,
    overlay 0.28s allow-discrete;
}

.drawer:popover-open::backdrop {
  opacity: 1;
}

@starting-style {
  .drawer:popover-open::backdrop {
    opacity: 0;
  }
}

.site-nav {
  height: 100%;
  overflow-y: auto;
  scrollbar-width: none;
}

.site-nav::-webkit-scrollbar {
  display: none;
}

.site-nav ul {
  padding: 4rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  /* base ul の list-style / margin を打ち消す */
  list-style: none;
  margin: 0;
}

.site-nav a {
  display: block;
  padding: 0.9rem 0.5rem;
  font-family: var(--font-serif-en);
  font-size: 0.95rem;
  color: var(--color-text);
  border: 0;
  border-bottom: 1px solid var(--color-line);
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-text);
  border-bottom-color: var(--color-text);
}

.drawer-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-line);
  border-radius: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 16px;
  cursor: pointer;
  touch-action: manipulation;
  z-index: 1;
}

.drawer-close:hover {
  border-color: var(--color-text);
}

.nav-toggle {
  touch-action: manipulation;
  display: inline-flex;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 0;
}

.nav-toggle:hover {
  background: color-mix(in oklab, var(--color-text) 6%, transparent);
}

/* PC: ヘッダー内インラインに切り替え（768px以上） */
@media (min-width: 768px) {
  .drawer {
    display: contents;
  }

  .site-nav {
    display: block;
    height: auto;
    overflow: visible;
  }

  .site-nav ul {
    flex-direction: row;
    gap: 1.75rem;
    padding: 0;
  }

  .site-nav a {
    display: inline;
    padding: 0;
    border-bottom: 0;
    font-size: 0.78rem;
    color: var(--color-muted);
  }

  .site-nav a:hover,
  .site-nav a[aria-current="page"] {
    color: var(--color-text);
  }

  .drawer-close,
  .nav-toggle {
    display: none;
  }
}

/* ===== 本文エリアの共通レイアウト ===== */
.site-main {
  flex: 1;
  width: 100%;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

section + section {
  margin-top: 3rem;
}

.page-title {
  font-family: var(--font-display), var(--font-serif-ja);
  font-size: clamp(1.8rem, 4vw, 2.2rem);
  text-align: center;
  /* base h1 の margin shorthand / 罫線を打ち消す */
  margin: 1rem 0 1rem;
  padding-bottom: 0;
  border-bottom: 0;
  letter-spacing: 0.12em;
}

.page-title + p {
  text-align: center;
  color: var(--color-muted);
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 0.9rem;
  margin: 0 0 3rem;
}

.section-title {
  font-family: var(--font-serif-en), var(--font-serif-ja);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  text-align: center;
  /* base h2 の margin / 罫線を打ち消す */
  margin: 0 0 1.25rem;
  padding-bottom: 0;
  border-bottom: 0;
}

/* ===== トップページの masthead（hero）===== */
.hero {
  text-align: center;
  position: relative;
  padding: 2.5rem 0 2rem;
  margin-bottom: 2.5rem;
}

.hero-title {
  display: block;
  font-family: var(--font-display), var(--font-serif-ja);
  font-size: clamp(2.4rem, 7vw, 3.4rem);
  letter-spacing: 0.04em;
  line-height: 1.1;
  /* base h1 の margin / 罫線を打ち消す */
  margin: 0;
  padding-bottom: 0;
  border-bottom: 0;
}

/* hero / intro を仕切る中央ヘアライン */
.intro::before,
.intro::after {
  content: "";
  display: block;
  width: 120px;
  height: 1px;
  background: var(--color-line);
  margin: 2rem auto;
}

/* ===== トップページ：イントロ段落 ===== */
.intro {
  text-align: center;
  margin: 0 auto 3.5rem;
  max-width: 520px;
}

.intro p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 2.05;
  text-align: justify;
  hanging-punctuation: allow-end;
  text-wrap: pretty;
}

/* ===== ブログ feed（post 一覧）===== */
.post-feed {
  display: flex;
  flex-direction: column;
}

.post {
  padding: 3rem 0;
  border-top: 1px solid var(--color-line);
}

.post:first-child {
  border-top: 0;
  padding-top: 0.5rem;
}

.post-meta {
  text-align: center;
  margin-bottom: 1.1rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.post-meta .date {
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 0.88rem;
  color: var(--color-muted);
  letter-spacing: 0.06em;
}

.post-meta .sep {
  display: inline-block;
  width: 18px;
  height: 1px;
  background: var(--color-shadow);
  opacity: 0.6;
}

.post-meta .cat {
  font-family: var(--font-serif-en);
  font-size: 0.7rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--color-faint);
}

.post-title {
  text-align: center;
  font-family: var(--font-serif-ja);
  font-size: 1.55rem;
  line-height: 1.7;
  /* base h2 の margin / 罫線を打ち消す */
  margin: 0 0 1.6rem;
  padding-bottom: 0;
  border-bottom: 0;
  letter-spacing: 0.06em;
}

.post-title a {
  border: 0;
}

.post-title a:hover {
  color: var(--color-muted);
}

.post-excerpt p {
  margin: 0 0 1.1em;
  text-align: justify;
  hanging-punctuation: allow-end;
  text-wrap: pretty;
  font-size: 0.94rem;
  line-height: 2.05;
}

.post-excerpt p:last-child {
  margin-bottom: 0;
}

/* 各 entry の最初の段落に dropcap */
.post-excerpt p:first-of-type::first-letter {
  font-family: var(--font-display);
  font-size: 3.2em;
  line-height: 0.95;
  float: left;
  padding: 0.1em 0.18em 0 0;
  color: var(--color-text);
}

.post-more {
  display: block;
  text-align: center;
  margin-top: 1.75rem;
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 0.82rem;
  color: var(--color-muted);
  letter-spacing: 0.06em;
  border: 0;
}

.post-more::after {
  content: "  →";
  font-style: normal;
}

.post-more:hover {
  color: var(--color-text);
}

/* ===== ページ送り ===== */
.pagination {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-line);
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 0.82rem;
  color: var(--color-muted);
  letter-spacing: 0.06em;
}

.pagination a {
  border: 0;
}

.pagination a:hover {
  color: var(--color-text);
}

.pagination .current {
  font-size: 0.7rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  font-style: normal;
}

/* ===== modules（サイドメニュー領域：footer 寄りの paper-soft 帯） ===== */
.modules {
  margin-top: 4rem;
  padding: 4rem 0 0;
  border-top: 1px solid var(--color-line);
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
}

.module h2 {
  font-family: var(--font-serif-ja);
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  text-align: center;
  /* base h2 の margin / 罫線を打ち消す */
  margin: 0 0 1.2rem;
  padding: 0;
  border-bottom: 0;
}

.module p,
.module li {
  font-size: 0.88rem;
  line-height: 1.95;
}

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

/* about-mini */
.about-mini {
  text-align: center;
  max-width: 480px;
  margin: 0 auto;
  line-height: 2;
}

.about-mini p {
  margin: 0;
}

.about-mini .signature {
  display: block;
  margin-top: 1.1rem;
  font-family: var(--font-serif-en);
  font-style: italic;
  color: var(--color-muted);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

/* links（2 カラム column-count） */
.links-list {
  max-width: 420px;
  margin: 0 auto;
  columns: 2;
  column-gap: 2.25rem;
  line-height: 2.4;
}

.links-list li {
  break-inside: avoid;
}

.links-list a {
  border: 0;
}

.links-list a::before {
  content: "·";
  margin-right: 0.5em;
  color: var(--color-shadow);
}

.links-list a:hover {
  color: var(--color-muted);
}

/* archive-month（footer module 内：月別アーカイブ） */
.archive-month {
  max-width: 460px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.archive-month li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.9rem;
  padding: 0.5rem 0;
  border-bottom: 1px dotted var(--color-line);
}

.archive-month a {
  border: 0;
  flex: 1;
}

.archive-month .count {
  font-family: var(--font-serif-en);
  font-style: italic;
  color: var(--color-faint);
  font-size: 0.82rem;
}

/* banners */
.banners-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.banner {
  display: inline-block;
  line-height: 0;
}

.banner img {
  display: block;
  width: 200px;
  max-width: 100%;
  height: auto;
}

.banner:hover {
  opacity: 0.85;
}

.banner-self {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
}

/* tagcloud（4 段階の大きさ） */
.tagcloud {
  text-align: center;
  max-width: 480px;
  margin: 0 auto;
  line-height: 2.4;
}

.tagcloud a {
  border: 0;
  display: inline-block;
  margin: 0 0.5rem;
  color: var(--color-muted);
  font-size: 0.88rem;
}

.tagcloud a:hover {
  color: var(--color-text);
}

.tagcloud a.s1 {
  font-size: 0.78rem;
  color: var(--color-faint);
}

.tagcloud a.s2 {
  font-size: 0.88rem;
}

.tagcloud a.s3 {
  font-size: 1.05rem;
  color: var(--color-text);
}

.tagcloud a.s4 {
  font-size: 1.3rem;
  color: var(--color-text);
  font-style: italic;
  font-family: var(--font-serif-ja);
}

/* contacts（mail / wavebox 等のリンク） */
.contacts {
  text-align: center;
  max-width: 420px;
  margin: 0 auto;
  font-size: 0.88rem;
  line-height: 2.1;
}

.contacts-note {
  display: block;
  margin: 0 0 0.6rem;
  font-family: var(--font-serif-en);
  font-style: italic;
  color: var(--color-muted);
}

.contacts-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.5rem;
}

.contacts-list a {
  border: 0;
}

.contacts-list a:hover {
  color: var(--color-text);
  border-bottom: 1px solid var(--color-text);
}

/* ===== 全記事一覧（archive.html）===== */
.archive-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.archive-item {
  display: grid;
  grid-template-columns: 7rem 5rem 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-line);
  align-items: baseline;
}

.archive-date {
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--color-muted);
}

.archive-cat {
  font-family: var(--font-serif-en);
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-faint);
}

.archive-title {
  font-size: 0.98rem;
}

.archive-title a {
  border: 0;
}

.archive-title a:hover {
  border-bottom: 1px solid var(--color-text);
}

@media (max-width: 560px) {
  .archive-item {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}

/* ===== つぶやきタイムライン（timeline.html）===== */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.timeline-item {
  padding: 2rem 0;
  border-top: 1px solid var(--color-line);
}

.timeline-item:first-child {
  border-top: 0;
  padding-top: 0.5rem;
}

/* ピン留め：藍紫の影をうっすら敷いて、左に細いアクセント罫を足す控えめな強調 */
.timeline-item.is-pinned {
  position: relative;
  padding: 2rem 1.25rem;
  background: var(--color-shadow-tint);
}

.timeline-item.is-pinned::before {
  content: "";
  position: absolute;
  top: 2rem;
  bottom: 2rem;
  left: 0;
  width: 1px;
  background: var(--color-shadow);
}

.timeline-meta {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  margin-bottom: 0.85rem;
}

/* pinned ラベル：イタリック小キャプスの控えめなマーカー */
.timeline-pin {
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: lowercase;
  color: var(--color-faint);
}

.timeline-time {
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: var(--color-muted);
}

.timeline-body {
  line-height: 2;
}

.timeline-body p {
  margin: 0;
  font-size: 0.94rem;
  text-align: justify;
  hanging-punctuation: allow-end;
  text-wrap: pretty;
}

.timeline-body p + p {
  margin-top: 1em;
}

/* 添付画像：1 枚なら幅を抑えて、複数なら整然と折り返すグリッド */
.timeline-media {
  margin-top: 1.1rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.6rem;
  max-width: 420px;
}

.timeline-media:has(a:only-child) {
  grid-template-columns: minmax(0, 320px);
}

.timeline-media a {
  display: block;
}

.timeline-media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--color-line);
}

/* ===== ブログ本文ページ（posts/NNN.html）===== */
.post-back {
  display: inline-block;
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
  border: 0;
}

.post-back:hover {
  color: var(--color-text);
}

.post-header {
  text-align: center;
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-line);
}

.post-header .post-meta {
  margin-bottom: 1.25rem;
}

.post-header-title {
  font-family: var(--font-serif-ja);
  font-size: clamp(1.5rem, 5vw, 1.85rem);
  line-height: 1.6;
  /* base h1 の margin / 罫線を打ち消す */
  margin: 0;
  padding-bottom: 0;
  border-bottom: 0;
  letter-spacing: 0.06em;
}

.post-body {
  max-width: var(--reading-width);
  margin: 2.5rem auto 3rem;
  line-height: 2.05;
}

.post-body p {
  margin: 0 0 1.4em;
  text-align: justify;
  hanging-punctuation: allow-end;
  text-wrap: pretty;
}

.post-body p:last-child {
  margin-bottom: 0;
}

.post-footer {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--color-line);
}

.post-footer-back {
  display: inline-block;
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--color-muted);
  border: 0;
}

.post-footer-back:hover {
  color: var(--color-text);
}

/* ===== about ページ ===== */
.about-section {
  margin-bottom: 2rem;
}

.about-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem 1.5rem;
  margin-top: 1rem;
}

.about-list dt {
  font-family: var(--font-serif-en);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-muted);
  padding-top: 0.25rem;
  /* base dt の margin-top を打ち消す（grid 表示で不要） */
  margin-top: 0;
}

/* ===== サイトフッター（colophon） ===== */
.site-footer {
  max-width: var(--content-width);
  margin: 4rem auto 0;
  padding: 2.5rem 1.5rem 3.5rem;
  border-top: 1px solid var(--color-line);
  text-align: center;
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 0.78rem;
  color: var(--color-muted);
  letter-spacing: 0.06em;
  line-height: 1.9;
}

.site-footer-mark {
  font-family: var(--font-display);
  font-style: normal;
  font-size: 0.78rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--color-faint);
  display: block;
  margin-top: 0.5rem;
}

.site-footer nav {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.site-footer nav a {
  color: var(--color-muted);
  border: 0;
}

.site-footer nav a:hover {
  color: var(--color-text);
}

/* ===== 「まだありません」表示用 ===== */
.empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-muted);
  font-family: var(--font-serif-en);
  font-style: italic;
}

/* ===== レスポンシブ ===== */
@media (max-width: 720px) {
  .hero {
    padding-top: 1.5rem;
  }

  .post {
    padding: 2.5rem 0;
  }

  .post-title {
    font-size: 1.3rem;
  }

  .post-excerpt p:first-of-type::first-letter {
    font-size: 2.6em;
  }

  .links-list {
    columns: 1;
  }
}