@charset "UTF-8";

/* =========================================================
   Team.KusuNoKi — デザインシステム

   「捜査資料」を思わせる紙面。明朝を主役に、罫線と余白で組む。
   セクションごとに紙（生成り）と墨（暗色）を切り替えて章立てを示す。

   1. 面は「紙」と「墨」の2種類。交互に配置して区切りをつくる。
   2. 罫線・番号・英字ラベルで資料らしさを出す。
   3. 日本語は明朝。英字の見出しはセリフのイタリック。ラベルはサンセリフ。
   4. アクセントは赤。分類・強調・記号にだけ使う。
   ========================================================= */

:root {
  /* --- 紙 --- */
  --paper:      #f4f1e8;
  --paper-2:    #eae5d8;
  --stone:      #a5aca4;

  /* --- 墨 --- */
  --ink:        #1c1b19;
  --ink-2:      #232220;

  /* --- 文字：紙の上 --- */
  --on-paper:      #1c1b19;
  --on-paper-dim:  #6f6b62;
  --on-paper-faint:#a09b90;

  /* --- 文字：墨の上 --- */
  --on-ink:      #f0ede4;
  --on-ink-dim:  #9d998e;
  --on-ink-faint:#6a675f;

  /* --- 罫線 --- */
  --rule-paper: rgba(28, 27, 25, 0.18);
  --rule-ink:   rgba(240, 237, 228, 0.16);

  /* --- アクセント --- */
  --accent:     #d0503c;

  /* --- 書体 --- */
  --mincho: "Hiragino Mincho ProN", "ヒラギノ明朝 ProN", "Yu Mincho", "游明朝",
            "YuMincho", "MS PMincho", serif;
  --serif:  "Times New Roman", Times, Georgia, serif;
  --sans:   "Helvetica Neue", Helvetica, Arial, "Hiragino Sans", "Yu Gothic", sans-serif;

  /* --- 寸法 --- */
  --wrap: 1300px;
  --gutter: 44px;
  --header-h: 96px;
}

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

html { scroll-behavior: smooth; }

/* ヘッダーが固定なので、ページ内リンクの着地点を下げる */
:target,
main > section[id] { scroll-margin-top: calc(var(--header-h) - 22px); }
.hero[id] { scroll-margin-top: 0; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--on-paper);
  font-family: var(--mincho);
  font-size: 16px;
  line-height: 2;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

/* ---------------------------------------------------------
   共通パーツ：ラベル・番号・罫線
   --------------------------------------------------------- */

/* 英字の小さなラベル。資料の見出し記号として全面的に使う */
.label {
  font-family: var(--sans);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin: 0;
}
.label--accent { color: var(--accent); }

/* 章番号。セリフのイタリックで大きく置く */
.index-no {
  font-family: var(--serif);
  font-style: italic;
  font-size: 2.6rem;
  line-height: 1;
  letter-spacing: 0.02em;
  margin: 0 0 6px;
}

/* 見出しの上に置く赤い短い罫 */
.tick {
  display: inline-block;
  width: 46px;
  height: 1px;
  background: var(--accent);
  vertical-align: middle;
  margin-right: 18px;
}

.rule { height: 1px; background: var(--rule-paper); border: 0; margin: 0; }
.sheet--ink .rule { background: var(--rule-ink); }

/* ---------------------------------------------------------
   シート（章）
   紙と墨を交互に敷いて区切る
   --------------------------------------------------------- */

.sheet {
  position: relative;
  background: var(--paper);
  color: var(--on-paper);
  padding: 128px 0;
  overflow: hidden;
}

.sheet--ink {
  background: var(--ink);
  color: var(--on-ink);
}

.sheet--tight { padding: 88px 0; }

/* 方眼。紙のシートにだけ薄く敷く */
.sheet--grid::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(28, 27, 25, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 27, 25, 0.05) 1px, transparent 1px);
  background-size: 26px 26px;
  pointer-events: none;
}

/* 墨のシートに置く、ぼんやりとした光 */
.sheet--ink::after {
  content: "";
  position: absolute;
  left: 50%; top: 55%;
  width: min(70vw, 900px);
  aspect-ratio: 1 / 1;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(240, 237, 228, 0.045), transparent 62%);
  pointer-events: none;
}

.wrap {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------------------------------------------------------
   ヘッダー
   --------------------------------------------------------- */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  color: var(--on-ink);
  transition: background .4s ease, height .4s ease;
}
.site-header.is-scrolled {
  height: 74px;
  background: rgba(28, 27, 25, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.site-header__inner {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand { display: flex; align-items: center; gap: 16px; }
.brand__mark {
  width: 46px; height: 46px;
  border-radius: 50%;
  object-fit: cover;
  flex: none;
}
.brand__name {
  font-family: var(--serif);
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
  margin: 0;
}

/* ナビは番号付き。項目名は日本語なので明朝で組む */
.global-nav ul {
  display: flex;
  align-items: center;
  gap: 30px;
  margin: 0; padding: 0;
  list-style: none;
}
.global-nav a {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--mincho);
  font-size: 0.86rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--on-ink);
  opacity: .78;
  transition: opacity .25s ease;
}
.global-nav a:hover,
.global-nav a[aria-current] { opacity: 1; }
.global-nav .no {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.64rem;
  color: var(--accent);
  letter-spacing: 0;
}

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  background: none;
  border: 0;
  cursor: pointer;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 10px;
  width: 24px; height: 1px;
  background: var(--on-ink);
  transition: transform .3s ease, opacity .2s ease;
}
.nav-toggle span:nth-child(1) { top: 17px; }
.nav-toggle span:nth-child(2) { top: 23px; }
.nav-toggle span:nth-child(3) { top: 29px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------------------------------------------------------
   ヒーロー
   --------------------------------------------------------- */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--ink);
  color: var(--on-ink);
}

/* 写真。マウスに合わせてゆっくり動く */
.hero__photo {
  position: absolute;
  inset: -5%;
  background: url("/images/hero-bg.jpg") center 40% / cover no-repeat;
  filter: grayscale(.34) contrast(1.06) brightness(.86) sepia(.14);
  transform:
    scale(1.08)
    translate3d(var(--mx, 0px), calc(var(--my, 0px) + var(--photo-shift, 0px)), 0);
  transition: transform .9s cubic-bezier(.16, 1, .3, 1);
  will-change: transform;
}
.hero__photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(28, 27, 25, .88) 0%, rgba(28, 27, 25, .26) 28%,
                            rgba(28, 27, 25, .36) 68%, rgba(28, 27, 25, .94) 100%),
    linear-gradient(90deg, rgba(28, 27, 25, .74) 0%, rgba(28, 27, 25, .06) 58%);
}

.hero__inner { position: relative; z-index: 2; width: 100%; }

.hero__eyebrow {
  display: flex;
  align-items: center;
  margin: 0 0 22px;
  font-family: var(--mincho);
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  color: var(--on-ink);
}

/* 大タイポ。上段はセリフのイタリック、下段はサンセリフの極太 */
.hero__title { margin: 0 0 40px; }
.hero__line1 {
  display: block;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(2.6rem, 8.4vw, 7rem);
  line-height: .98;
  letter-spacing: 0.01em;
}
.hero__line2 {
  display: block;
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(2.8rem, 9.6vw, 8rem);
  line-height: .96;
  letter-spacing: -0.015em;
}
.hero__dot {
  display: inline-block;
  width: .16em; height: .16em;
  background: var(--accent);
  vertical-align: baseline;
  margin-left: .06em;
}

.hero__desc {
  font-size: 0.98rem;
  line-height: 2.1;
  letter-spacing: 0.08em;
  color: var(--on-ink);
  margin: 0;
  max-width: 42em;
}

/* 右下：最新作へのショートカット */
.hero__latest {
  position: absolute;
  right: var(--gutter); bottom: 104px;
  z-index: 2;
  display: block;
  max-width: 300px;
  padding: 18px 26px 20px;
  border: 1px solid var(--rule-ink);
  background: rgba(28, 27, 25, 0.42);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  transition: background .3s ease, border-color .3s ease, transform .3s ease;
}
.hero__latest:hover {
  background: rgba(28, 27, 25, 0.72);
  border-color: var(--accent);
  transform: translateY(-3px);
}
.hero__latest-label {
  display: block;
  font-family: var(--sans);
  font-size: 0.56rem;
  letter-spacing: 0.2em;
  color: var(--accent);
}
.hero__latest-title {
  display: block;
  font-family: var(--mincho);
  font-size: 1.06rem;
  letter-spacing: 0.08em;
  line-height: 1.6;
  margin: 8px 0 6px;
}
.hero__latest-title::after {
  content: " ↗";
  font-size: 0.8rem;
  color: var(--on-ink-dim);
}
.hero__latest-meta {
  display: block;
  font-family: var(--sans);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--on-ink-dim);
}

/* 右端の縦書き */
.hero__coord {
  position: absolute;
  right: 18px; top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  writing-mode: vertical-rl;
  font-family: var(--sans);
  font-size: 0.56rem;
  letter-spacing: 0.3em;
  color: var(--on-ink-faint);
  margin: 0;
}

/* ---------------------------------------------------------
   舞い落ちる葉（ヒーローを見ている間だけ）
   --------------------------------------------------------- */

.leaves {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
  pointer-events: none;
  transition: opacity 1s ease;
}
.leaves[data-hidden="true"] { opacity: 0; }

.leaf {
  position: absolute;
  top: -14vh;
  left: var(--x, 50%);
  width: var(--size, 18px);
  animation: leaf-fall var(--fall, 16s) linear var(--delay, 0s) infinite;
  will-change: transform;
}
.leaf__inner {
  display: block;
  animation: leaf-sway var(--sway, 5s) ease-in-out var(--delay, 0s) infinite alternate;
  transform-origin: 50% 30%;
}
.leaf svg {
  display: block;
  width: 100%; height: auto;
  color: #cbb98f;
  opacity: var(--opa, .3);
}

@keyframes leaf-fall {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(var(--drift, 40px), 122vh, 0); }
}
@keyframes leaf-sway {
  from { transform: translateX(calc(var(--amp, 26px) * -1)) rotate(var(--tilt-a, -24deg)); }
  to   { transform: translateX(var(--amp, 26px)) rotate(var(--tilt-b, 30deg)); }
}

/* ---------------------------------------------------------
   章見出し
   --------------------------------------------------------- */

.chapter {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 0 34px;
  margin-bottom: 64px;
}

.chapter__no { color: var(--on-paper-faint); }
.sheet--ink .chapter__no { color: var(--on-ink-faint); }
.chapter__no .label { margin-top: 2px; }

.chapter__eyebrow {
  font-family: var(--sans);
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--on-paper-dim);
  margin: 0 0 20px;
}
.sheet--ink .chapter__eyebrow { color: var(--on-ink-dim); }

.chapter__title {
  font-family: var(--mincho);
  font-weight: 400;
  font-size: clamp(2rem, 5.4vw, 3.6rem);
  line-height: 1.3;
  letter-spacing: 0.06em;
  margin: 0;
}
.chapter__title .em { color: var(--accent); }


.chapter__lead {
  font-size: 0.95rem;
  line-height: 2.1;
  letter-spacing: 0.06em;
  color: var(--on-paper-dim);
  margin: 24px 0 0;
  max-width: 38em;
}
.sheet--ink .chapter__lead { color: var(--on-ink-dim); }

/* 見出しの右にメタ情報を出したいとき */

/* ---------------------------------------------------------
   概要（トップページの ABOUT セクション）
   --------------------------------------------------------- */

/* 章の冒頭に置く一行 */
.about-statement {
  font-family: var(--mincho);
  font-size: clamp(1.4rem, 2.8vw, 2.2rem);
  font-weight: 400;
  line-height: 1.8;
  letter-spacing: 0.08em;
  margin: 0 0 56px;
}
.about-statement .em { color: var(--accent); }

/* 概要の本文。項目が増えたら 2 → 3 段に折り返す */
.about-lead {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(268px, 1fr));
  gap: 40px 56px;
  max-width: 46em;
}
.about-lead h3 {
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule-ink);
  font-family: var(--sans);
  font-size: 0.64rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--on-ink-dim);
}
.sheet:not(.sheet--ink) .about-lead h3 {
  border-color: var(--rule-paper);
  color: var(--on-paper-dim);
}
.about-lead p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 2.2;
  letter-spacing: 0.06em;
  color: var(--on-ink-dim);
}
.sheet:not(.sheet--ink) .about-lead p { color: var(--on-paper-dim); }


/* ---------------------------------------------------------
   お知らせ（罫線で区切る一覧）
   --------------------------------------------------------- */

.record-list { list-style: none; margin: 0; padding: 0; }
.record-list > li { border-top: 1px solid var(--rule-paper); }
.record-list > li:last-child { border-bottom: 1px solid var(--rule-paper); }
.sheet--ink .record-list > li { border-color: var(--rule-ink); }

.record {
  display: grid;
  grid-template-columns: 96px 150px 130px 1fr 40px;
  align-items: center;
  gap: 0 16px;
  padding: 26px 8px;
  position: relative;
  transition: background .35s ease, padding-left .35s ease;
}
a.record:hover { background: rgba(28, 27, 25, 0.045); padding-left: 20px; }
.sheet--ink a.record:hover { background: rgba(240, 237, 228, 0.05); }

.record__no {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--on-paper-faint);
}
.sheet--ink .record__no { color: var(--on-ink-faint); }

.record__date {
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--on-paper-dim);
  font-variant-numeric: tabular-nums;
}
.sheet--ink .record__date { color: var(--on-ink-dim); }

.record__tag {
  font-family: var(--sans);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--accent);
}

.record__title {
  font-size: 0.98rem;
  letter-spacing: 0.04em;
  line-height: 1.8;
}

.record__arrow {
  justify-self: end;
  font-size: 1.15rem;
  line-height: 1;
  color: var(--on-paper);
  transition: transform .35s cubic-bezier(.16, 1, .3, 1);
}
.sheet--ink .record__arrow { color: var(--on-ink); }
a.record:hover .record__arrow { transform: translate(4px, -4px); }

/* ---------------------------------------------------------
   作品（資料仕立て）
   --------------------------------------------------------- */

.case { position: relative; }

/* 背後に置く巨大な薄い文字 */
.case__watermark {
  position: absolute;
  left: -2%; top: -6%;
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(6rem, 16vw, 15rem);
  line-height: .9;
  letter-spacing: -0.02em;
  color: rgba(28, 27, 25, 0.055);
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
}
.sheet--ink .case__watermark { color: rgba(240, 237, 228, 0.045); }

.case__body {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 72px;
  align-items: center;
}

/* 左：傾けて置いた冊子 */
.case__visual { position: relative; }
.case__photo {
  position: relative;
  aspect-ratio: 3 / 4;
  background: var(--stone);
  overflow: hidden;
  transform: rotate(-2.2deg);
  transition: transform .7s cubic-bezier(.16, 1, .3, 1);
}
.case__photo img { width: 100%; height: 100%; object-fit: cover; }
.case:hover .case__photo { transform: rotate(-1deg) translateY(-6px); }

/* 冊子の内側に引いた細い枠 */
.case__photo::after {
  content: "";
  position: absolute;
  inset: 16px;
  border: 1px solid rgba(240, 237, 228, 0.42);
  pointer-events: none;
}

.case__stamp {
  position: absolute;
  right: -12px; bottom: 34px;
  background: var(--accent);
  color: #fff;
  padding: 10px 18px;
  transform: rotate(-2deg);
  font-family: var(--sans);
}
.case__stamp small {
  display: block;
  font-size: 0.54rem;
  letter-spacing: 0.18em;
  opacity: .85;
}
.case__stamp strong {
  display: block;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

/* 右：タイトルと概要 */
.case__label {
  font-family: var(--sans);
  font-size: 0.64rem;
  letter-spacing: 0.22em;
  color: var(--on-paper-dim);
  margin: 0 0 26px;
}
.sheet--ink .case__label { color: var(--on-ink-dim); }

.case__title {
  margin: 0 0 30px;
  padding-left: 26px;
  border-left: 1px solid var(--on-paper);
}
.sheet--ink .case__title { border-color: var(--on-ink); }
.case__ruby {
  display: block;
  font-family: var(--mincho);
  font-size: 0.82rem;
  letter-spacing: 0.24em;
  margin-bottom: 6px;
}
.case__name {
  display: block;
  font-family: var(--mincho);
  font-weight: 400;
  font-size: clamp(2rem, 4.8vw, 3.4rem);
  line-height: 1.25;
  letter-spacing: 0.08em;
}

.case__text {
  font-size: 0.9rem;
  line-height: 2.1;
  letter-spacing: 0.05em;
  color: var(--on-paper);
  margin: 0 0 36px;
}
.sheet--ink .case__text { color: var(--on-ink); }

/* 仕様の3列表 */
.spec {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule-paper);
  border-bottom: 1px solid var(--rule-paper);
}
.sheet--ink .spec { border-color: var(--rule-ink); }

.spec > div { padding: 18px 22px; }
.spec > div + div { border-left: 1px solid var(--rule-paper); }
.sheet--ink .spec > div + div { border-color: var(--rule-ink); }

.spec dt {
  font-family: var(--sans);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  color: var(--on-paper-dim);
  margin: 0 0 6px;
}
.sheet--ink .spec dt { color: var(--on-ink-dim); }
.spec dd {
  font-family: var(--mincho);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  margin: 0;
}

/* ---------------------------------------------------------
   引用（プロローグ）
   --------------------------------------------------------- */

.prologue { position: relative; display: grid; grid-template-columns: 1fr 1fr; align-items: center; }
.prologue__photo { position: relative; aspect-ratio: 4 / 5; overflow: hidden; }
.prologue__photo img { width: 100%; height: 100%; object-fit: cover; }
.prologue__photo::after {
  content: "";
  position: absolute;
  inset: 22px;
  border: 1px solid rgba(240, 237, 228, 0.4);
}

.prologue__quote {
  position: relative;
  background: var(--ink);
  color: var(--on-ink);
  padding: 66px 56px 52px;
  margin-left: -14%;
}
.prologue__mark {
  position: absolute;
  left: 46px; top: 14px;
  font-family: var(--serif);
  font-size: 3.4rem;
  line-height: 1;
  color: var(--accent);
}
.prologue__text {
  font-family: var(--mincho);
  font-size: clamp(1rem, 1.5vw, 1.22rem);
  line-height: 2.2;
  letter-spacing: 0.08em;
  margin: 0 0 26px;
}
.prologue__from {
  font-family: var(--sans);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--on-ink-dim);
  margin: 0;
}

/* ---------------------------------------------------------
   3本柱（PLACE / STORY / DISCOVERY）
   --------------------------------------------------------- */

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule-ink);
  border-bottom: 1px solid var(--rule-ink);
}
.pillars > div { padding: 26px 30px; display: flex; align-items: baseline; gap: 24px; }
.pillars > div + div { border-left: 1px solid var(--rule-ink); }
.pillars .no {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.7rem;
  color: var(--accent);
}
.pillars .name {
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.2em;
}

/* 紙のシートに置く場合 */
.sheet:not(.sheet--ink) .pillars { border-color: var(--rule-paper); }
.sheet:not(.sheet--ink) .pillars > div + div { border-color: var(--rule-paper); }

/* ---------------------------------------------------------
   流れる帯
   --------------------------------------------------------- */

.marquee {
  border-top: 1px solid var(--rule-ink);
  border-bottom: 1px solid var(--rule-ink);
  overflow: hidden;
  padding: 18px 0;
}
.sheet:not(.sheet--ink) .marquee { border-color: var(--rule-paper); }

.marquee__inner {
  display: flex;
  width: max-content;
  animation: marquee 38s linear infinite;
}
.marquee span {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.2rem, 2.4vw, 1.9rem);
  letter-spacing: 0.06em;
  color: var(--on-ink-faint);
  padding-right: 1.2em;
  white-space: nowrap;
}
.sheet:not(.sheet--ink) .marquee span { color: var(--on-paper-faint); }

@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ---------------------------------------------------------
   ボタン（矩形。塗りと線の2種）
   --------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
  min-width: 300px;
  padding: 22px 28px;
  background: var(--ink);
  color: var(--on-ink);
  font-family: var(--sans);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  border: 1px solid var(--ink);
  transition: background .3s ease, color .3s ease;
}
.btn::after { content: "↗"; font-size: 1.1rem; }
.btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

.sheet--ink .btn { background: var(--on-ink); color: var(--ink); border-color: var(--on-ink); }
.sheet--ink .btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

.btn--line {
  background: transparent;
  color: var(--on-paper);
  border-color: var(--rule-paper);
}
.btn--line:hover { background: var(--ink); border-color: var(--ink); color: var(--on-ink); }
.sheet--ink .btn--line { background: transparent; color: var(--on-ink); border-color: var(--rule-ink); }
.sheet--ink .btn--line:hover { background: var(--on-ink); color: var(--ink); }

.btn-row { display: flex; flex-wrap: wrap; gap: 16px; }

/* 文中のリンク */
.link-inline {
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
  transition: color .25s ease;
}
.link-inline:hover { color: var(--accent); }

/* ---------------------------------------------------------
   メンバー
   --------------------------------------------------------- */

.member-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule-paper);
}
.member {
  padding: 36px 30px 40px;
  border-bottom: 1px solid var(--rule-paper);
  border-right: 1px solid var(--rule-paper);
  transition: background .35s ease;
}
.member:hover { background: rgba(28, 27, 25, 0.04); }

.member__photo {
  width: 96px;
  aspect-ratio: 1 / 1;
  margin: 0 0 22px;
  background: var(--paper-2);
  overflow: hidden;
}
.member__photo img { width: 100%; height: 100%; object-fit: cover; }
.member__photo-ph {
  display: flex; align-items: center; justify-content: center;
  width: 100%; height: 100%;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.5rem;
  color: var(--on-paper-faint);
}
.member__role {
  font-family: var(--sans);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin: 0 0 8px;
}
.member__name {
  font-family: var(--mincho);
  font-size: 1.15rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  margin: 0 0 12px;
}
.member__text {
  font-size: 0.84rem;
  line-height: 2;
  color: var(--on-paper-dim);
  margin: 0;
}

/* 横送りにしたときの位置表示。狭い画面でだけ出す */
.member-dots {
  display: none;
  justify-content: center;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}
.member-dots button {
  display: block;
  width: 7px; height: 7px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--on-paper-faint);
  opacity: .45;
  cursor: pointer;
  transition: opacity .3s ease, transform .3s ease, background .3s ease;
}
.sheet--ink .member-dots button { background: var(--on-ink-faint); }
.member-dots button[aria-current="true"] {
  background: var(--accent);
  opacity: 1;
  transform: scale(1.3);
}

/* 墨のシートに置いたとき */
.sheet--ink .member-grid { border-top-color: var(--rule-ink); }
.sheet--ink .member { border-bottom-color: var(--rule-ink); border-right-color: var(--rule-ink); }
.sheet--ink .member:hover { background: rgba(240, 237, 228, 0.05); }
.sheet--ink .member__photo { background: var(--ink-2); }
.sheet--ink .member__photo-ph { color: var(--on-ink-faint); }
.sheet--ink .member__text { color: var(--on-ink-dim); }

/* 章見出しの下に置く一行の説明 */
.section-lead {
  max-width: 40em;
  margin: 0 0 52px;
  font-size: 0.92rem;
  line-height: 2.2;
  letter-spacing: 0.06em;
  color: var(--on-paper-dim);
}
.sheet--ink .section-lead { color: var(--on-ink-dim); }

/* ---------------------------------------------------------
   本文
   --------------------------------------------------------- */

.prose { max-width: 44em; }
.prose h2 {
  font-family: var(--mincho);
  font-size: 1.4rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  margin: 62px 0 22px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--rule-paper);
}
.sheet--ink .prose h2 { border-color: var(--rule-ink); }
.prose h2:first-child { margin-top: 0; }
.prose h3 {
  font-family: var(--mincho);
  font-size: 1.08rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  margin: 36px 0 12px;
}
.prose p { margin: 0 0 22px; letter-spacing: 0.04em; }
.prose ul, .prose ol { margin: 0 0 22px; padding-left: 1.5em; }
.prose li { margin-bottom: 10px; letter-spacing: 0.04em; }
.prose li::marker { color: var(--accent); }
.prose strong { font-weight: 600; }

.note {
  border-left: 2px solid var(--accent);
  padding: 6px 0 6px 24px;
  margin: 0 0 26px;
  font-size: 0.88rem;
  line-height: 2.1;
  color: var(--on-paper-dim);
}
.sheet--ink .note { color: var(--on-ink-dim); }
.note p:last-child { margin-bottom: 0; }

/* 資料表（縦並びの明細） */
.detail-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
.detail-table th,
.detail-table td {
  text-align: left;
  padding: 18px 12px;
  border-bottom: 1px solid var(--rule-paper);
  vertical-align: top;
}
.sheet--ink .detail-table th,
.sheet--ink .detail-table td { border-color: var(--rule-ink); }
.detail-table tr:first-child th,
.detail-table tr:first-child td { border-top: 1px solid var(--rule-paper); }
.sheet--ink .detail-table tr:first-child th,
.sheet--ink .detail-table tr:first-child td { border-color: var(--rule-ink); }
.detail-table th {
  width: 13em;
  font-family: var(--sans);
  font-size: 0.64rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--on-paper-dim);
  white-space: nowrap;
  padding-top: 22px;
}
.sheet--ink .detail-table th { color: var(--on-ink-dim); }

/* ---------------------------------------------------------
   下層ページの見出し
   --------------------------------------------------------- */

.page-head {
  background: var(--ink);
  color: var(--on-ink);
  padding: calc(var(--header-h) + 76px) 0 76px;
  position: relative;
  overflow: hidden;
}
.page-head::after {
  content: "";
  position: absolute;
  left: 50%; top: 40%;
  width: min(60vw, 760px);
  aspect-ratio: 1 / 1;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(240, 237, 228, 0.05), transparent 62%);
}
.page-head__inner { position: relative; z-index: 1; }
.page-head .breadcrumb { margin: 0 0 34px; }
.page-head__label {
  font-family: var(--sans);
  font-size: 0.64rem;
  letter-spacing: 0.24em;
  color: var(--accent);
  margin: 0 0 18px;
}
.page-head__title {
  font-family: var(--mincho);
  font-weight: 400;
  font-size: clamp(2rem, 5.6vw, 3.6rem);
  line-height: 1.3;
  letter-spacing: 0.08em;
  margin: 0 0 22px;
}
.page-head__sub {
  font-size: 0.95rem;
  line-height: 2.1;
  letter-spacing: 0.06em;
  color: var(--on-ink-dim);
  margin: 0;
  max-width: 40em;
}

.breadcrumb {
  font-family: var(--sans);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  color: var(--on-ink-faint);
}
.breadcrumb a:hover { color: var(--on-ink); }

/* ---------------------------------------------------------
   締めのCTA
   --------------------------------------------------------- */

.closing { position: relative; overflow: hidden; }
.closing__kanji {
  position: absolute;
  right: -4%; bottom: -22%;
  font-family: var(--mincho);
  font-size: clamp(14rem, 30vw, 30rem);
  line-height: 1;
  color: rgba(28, 27, 25, 0.045);
  pointer-events: none;
  user-select: none;
}
.closing__title {
  font-family: var(--mincho);
  font-weight: 400;
  font-size: clamp(2rem, 5.6vw, 4rem);
  line-height: 1.4;
  letter-spacing: 0.06em;
  margin: 0 0 30px;
}
.closing__text {
  font-size: 0.92rem;
  letter-spacing: 0.06em;
  color: var(--on-paper-dim);
  margin: 0 0 40px;
}


/* ---------------------------------------------------------
   フッター
   --------------------------------------------------------- */

.site-footer {
  background: var(--ink);
  color: var(--on-ink);
  padding: 56px 0;
}
.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.copyright {
  font-family: var(--sans);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: var(--on-ink-dim);
  margin: 0;
}
.to-top {
  font-family: var(--sans);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: var(--on-ink-dim);
  transition: color .25s ease;
}
.to-top:hover { color: var(--on-ink); }

.footer-nav { display: flex; flex-wrap: wrap; gap: 26px; margin: 0; padding: 0; list-style: none; }
.footer-nav a {
  font-family: var(--sans);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--on-ink-dim);
  transition: color .25s ease;
}
.footer-nav a:hover { color: var(--on-ink); }

/* ---------------------------------------------------------
   マウスに追従するぼんやりした光
   --------------------------------------------------------- */

.glow {
  position: fixed;
  left: 0; top: 0;
  width: 520px; height: 520px;
  margin: -260px 0 0 -260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(208, 80, 60, 0.10), transparent 62%);
  pointer-events: none;
  z-index: 3;
  opacity: 0;
  transform: translate3d(var(--gx, 50vw), var(--gy, 50vh), 0);
  transition: opacity .6s ease;
  mix-blend-mode: screen;
}
.glow.is-on { opacity: 1; }

/* 触れると明るくなる面 */
.lift { position: relative; overflow: hidden; }
.lift::before {
  content: "";
  position: absolute;
  left: var(--lx, 50%); top: var(--ly, 50%);
  width: 460px; height: 460px;
  margin: -230px 0 0 -230px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(28, 27, 25, 0.07), transparent 62%);
  opacity: 0;
  transition: opacity .45s ease;
  pointer-events: none;
}
.sheet--ink .lift::before { background: radial-gradient(circle, rgba(240, 237, 228, 0.09), transparent 62%); }
.lift:hover::before { opacity: 1; }

/* ---------------------------------------------------------
   スクロール連動
   --------------------------------------------------------- */

.js [data-reveal] {
  opacity: 0;
  transition:
    opacity 1.1s cubic-bezier(.16, 1, .3, 1),
    transform 1.1s cubic-bezier(.16, 1, .3, 1);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
.js [data-reveal="up"]    { transform: translateY(34px); }
.js [data-reveal="left"]  { transform: translateX(-34px); }
.js [data-reveal="right"] { transform: translateX(34px); }
.js [data-reveal="scale"] { transform: scale(.96); }
.js [data-reveal].is-visible { opacity: 1; transform: none; }

.js [data-split] { opacity: 1 !important; transform: none !important; }
.js .char {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.4em);
  transition:
    opacity .8s cubic-bezier(.16, 1, .3, 1),
    transform .8s cubic-bezier(.16, 1, .3, 1);
  transition-delay: var(--char-delay, 0ms);
}
.js .is-visible .char { opacity: 1; transform: none; }

.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px; width: 100%;
  transform: scaleX(0);
  transform-origin: left;
  background: var(--accent);
  z-index: 200;
  pointer-events: none;
}

/* ---------------------------------------------------------
   ローディング
   --------------------------------------------------------- */

.loader {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity .9s ease, visibility .9s ease;
}
.loader[data-done="true"] { opacity: 0; visibility: hidden; }
.loader__mark {
  width: min(30vw, 160px);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  overflow: hidden;
  animation: loader-in 1.6s cubic-bezier(.16, 1, .3, 1) forwards;
}
.loader__mark img { width: 100%; height: 100%; object-fit: cover; }
@keyframes loader-in {
  0%   { opacity: 0; transform: scale(.88) rotate(-12deg); }
  100% { opacity: 1; transform: scale(1) rotate(0deg); }
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------------------------------------------------------
   レスポンシブ
   --------------------------------------------------------- */

@media (max-width: 1024px) {
  :root { --gutter: 28px; --header-h: 82px; }

  .chapter { grid-template-columns: 1fr; gap: 18px; }
  .index-no { font-size: 2rem; }

  .case__body { grid-template-columns: 1fr; gap: 48px; }
  .case__visual { max-width: 420px; }

  .prologue { grid-template-columns: 1fr; }
  .prologue__quote { margin-left: 0; padding: 48px 32px 40px; }
  .prologue__mark { left: 24px; }

  .record { grid-template-columns: 56px 110px 1fr 32px; row-gap: 6px; }
  .record__tag { grid-column: 3; }
  .record__title { grid-column: 3; }
  .record__arrow { grid-column: 4; grid-row: 1 / span 2; }

  .pillars, .spec { grid-template-columns: 1fr; }
  .pillars > div + div,
  .spec > div + div { border-left: 0; border-top: 1px solid var(--rule-ink); }
  .sheet:not(.sheet--ink) .spec > div + div { border-top-color: var(--rule-paper); }
}

@media (max-width: 860px) {
  .nav-toggle { display: block; }

  .global-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    background: rgba(28, 27, 25, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    max-height: 0;
    overflow: hidden;
    transition: max-height .4s cubic-bezier(.16, 1, .3, 1);
  }
  .global-nav[data-open="true"] { max-height: 76svh; }
  .global-nav ul { flex-direction: column; align-items: stretch; gap: 0; padding: 12px 0 24px; }
  .global-nav li + li { border-top: 1px solid var(--rule-ink); }
  .global-nav a { padding: 18px var(--gutter); font-size: 0.88rem; }

  .sheet { padding: 88px 0; }
  /* 狭い画面では最新作カードを本文の下に流し込む */
  .hero {
    flex-direction: column;
    justify-content: center;
    padding: calc(var(--header-h) + 32px) 0 104px;
  }
  .hero__inner { flex: none; }
  .hero__latest {
    position: static;
    align-self: stretch;
    margin: 34px var(--gutter) 0;
    max-width: none;
    padding: 14px 20px 16px;
  }
  .hero__latest-title { font-size: 0.98rem; margin: 6px 0 4px; }
  .hero__coord { display: none; }
  .about-statement { margin-bottom: 40px; }
  .btn { min-width: 0; width: 100%; gap: 24px; }

  .member-grid { border-top: 0; }
  .member { border-right: 0; }
}

/* ---------------------------------------------------------
   スマートフォン
   横に並べていたものを、素直に縦へ積み直す
   --------------------------------------------------------- */

@media (max-width: 620px) {
  :root { --gutter: 22px; }

  .sheet { padding: 72px 0; }
  .index-no { font-size: 1.8rem; }

  /* お知らせ：日付と分類を1行目、見出しを2行目に置く。
     横4列のままだと見出しの幅が数文字分しか残らないため */
  .record {
    grid-template-columns: auto auto 1fr auto;
    column-gap: 14px;
    row-gap: 10px;
    padding: 22px 2px;
    align-items: baseline;
  }
  .record__no    { grid-column: 1; grid-row: 1; font-size: 0.95rem; }
  .record__date  { grid-column: 2; grid-row: 1; }
  .record__tag   { grid-column: 3; grid-row: 1; justify-self: start; }
  .record__arrow { grid-column: 4; grid-row: 1; font-size: 1rem; }
  .record__title {
    grid-column: 1 / -1;
    grid-row: 2;
    font-size: 0.94rem;
    line-height: 1.9;
  }

  /* 作品タイトル：「クスノキが枯れた日」で一つの題名なので、
     上下で分けず同じ大きさで続けて組む */
  .case__title { padding-left: 16px; margin-bottom: 24px; }
  .case__ruby,
  .case__name {
    display: inline;
    font-family: var(--mincho);
    font-weight: 400;
    font-size: 1.55rem;
    line-height: 1.5;
    letter-spacing: 0.05em;
    margin: 0;
  }

  .case__watermark { display: none; }
  .case__stamp { transform: scale(.85); transform-origin: right bottom; }

  /* 肩書きが単語の途中で折り返さないよう、字間と大きさを詰める */
  .hero__eyebrow { font-size: 0.76rem; letter-spacing: 0.14em; }
  .tick { width: 28px; margin-right: 12px; }
  .hero__desc { font-size: 0.92rem; line-height: 2; }

  .about-statement { font-size: 1.3rem; line-height: 1.9; }
  .closing__title { font-size: 1.7rem; }
  .chapter__title { font-size: 1.9rem; }

  /* メンバー：縦に積まず、1人ずつ中央に送る。
     scroll-snap-stop で、勢いよく払っても2枚以上飛ばさないようにする */
  .member-grid {
    display: flex;
    gap: 12px;
    border-top: 0;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    margin: 0 calc(var(--gutter) * -1);
    padding: 12px 0;
  }
  .member-grid::-webkit-scrollbar { display: none; }
  /* 前後に余白を挟んで、最初と最後のカードも中央に来るようにする。
     余白もカードも同じ基準（枠の内寸）の割合なので、幅が変わってもずれない */
  .member-grid::before,
  .member-grid::after {
    content: "";
    flex: 0 0 calc(12.5% - 12px);
  }
  .member {
    flex: 0 0 75%;
    scroll-snap-align: center;
    scroll-snap-stop: always;
    border: 1px solid var(--rule-paper);
    padding: 28px 24px 32px;
  }
  .sheet--ink .member { border-color: var(--rule-ink); }
  .member:hover { background: none; }
  .member__photo { width: 76px; margin-bottom: 18px; }

  /* 中央の1枚だけを前に出し、両隣は落として奥に見せる。
     出現アニメーションより後に効かせたいので詳細度を上げてある */
  .js .member[data-reveal],
  .js .member[data-reveal].is-visible {
    opacity: .28;
    transform: scale(.93);
    transition: opacity .18s ease-out, transform .24s ease-out, box-shadow .24s ease-out;
  }
  .js .member[data-reveal].is-active,
  .js .member[data-reveal].is-visible.is-active {
    opacity: 1;
    transform: scale(1);
    box-shadow: 0 16px 38px rgba(0, 0, 0, .38);
  }
  .sheet:not(.sheet--ink) .js .member[data-reveal].is-active {
    box-shadow: 0 16px 34px rgba(28, 27, 25, .16);
  }

  .member-dots { display: flex; }

  .spec > div { padding: 14px 16px; }
  .detail-table th { width: auto; display: block; padding-bottom: 0; border-bottom: 0; }
  .detail-table td { display: block; padding-top: 6px; }
}

/* 画面がとくに狭い端末。文が語の途中で折り返さないよう、少しだけ縮める */
@media (max-width: 380px) {
  :root { --gutter: 18px; }

  .about-statement { font-size: 1.15rem; letter-spacing: 0.03em; }
  .closing__title { font-size: 1.45rem; letter-spacing: 0.03em; }
  .chapter__title { font-size: 1.7rem; }
  .hero__desc { font-size: 0.88rem; letter-spacing: 0.04em; }
  .hero__eyebrow { font-size: 0.72rem; letter-spacing: 0.08em; }
  .case__ruby,
  .case__name { font-size: 1.4rem; }
  .member { flex-basis: 82%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  .js [data-reveal], .js .char { opacity: 1 !important; transform: none !important; }
  .leaves, .glow, .scroll-progress, .loader { display: none; }
  .marquee__inner { animation: none; }
  .hero__photo { transform: scale(1.08) !important; }
}