@charset "UTF-8";
/* ============================================================
   鉄骨系構造学領域 — 共通スタイル
   コンセプト: 「構造図面 (Structural Drawing)」
   鋼の質感 × 製図グリッド × 骨組線画
   ============================================================ */

/* ---- Web フォント (IBM Plex: 工学系ブランドの書体) ---- */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans+JP:wght@300;400;500;600;700&display=swap');

/* ---- デザイントークン ---- */
:root {
  --ink:        #15191f;   /* 鋼のような濃墨。本文・骨組線 */
  --ink-soft:   #2a3038;
  --steel:      #2f5d8a;   /* 構造ブルー。主要アクセント／リンク */
  --steel-br:   #3f78ad;   /* 明るい鋼。ホバー */
  --rust:       #b85535;   /* 錆色＝塑性ヒンジ。ごく限定的に使う */
  --paper:      #f3f4f1;   /* 図面用紙のような寒色オフホワイト */
  --surface:    #ffffff;
  --line:       #e2e4df;   /* 細罫線 */
  --line-st:    #c7ccc3;   /* やや濃い罫線 */
  --mute:       #687079;   /* 補助テキスト */
  --text:       #1b1f24;

  --serif: 'IBM Plex Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', 'Meiryo', sans-serif;
  --mono:  'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

  --maxw: 1180px;
  --gutter: 64px;          /* 左の製図グリッド余白 */
}

/* ---- リセット ---- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
  background-color: var(--paper);
  /* 方眼紙のようなごく薄いグリッド */
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: -1px -1px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--steel); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--steel-br); }
h1, h2, h3, h4 { line-height: 1.3; font-weight: 600; margin: 0; }

/* ---- 汎用 ---- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.mono { font-family: var(--mono); }

/* 製図風ラベル（X1, Y1 のようなグリッド符号） */
.eyebrow {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--steel);
  display: inline-flex;
  align-items: center;
  gap: .55em;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 22px;
  border: 1.5px solid var(--steel);
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  font-size: .68rem;
  color: var(--steel);
  line-height: 1;
}
/* 符号入りの丸（data-ref属性で中身を表示） */
.eyebrow[data-ref]::before { content: attr(data-ref); }

/* ============================================================
   ヘッダー（濃墨の細いバー）
   ============================================================ */
.site-header {
  background: var(--ink);
  color: #e8eaed;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 56px;
  padding-top: 8px;
  padding-bottom: 8px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
}
.brand svg { flex: 0 0 auto; }
.brand .mark-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand .mark-en {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: #9fb4c9;
  text-transform: uppercase;
}
.brand .mark-ja { font-size: .92rem; font-weight: 600; letter-spacing: .02em; }
.affil {
  font-family: var(--mono);
  font-size: .68rem;
  color: #8d97a2;
  text-align: right;
  letter-spacing: .03em;
  line-height: 1.55;
}

/* ============================================================
   ナビゲーション（製図番号 01–05 つき・上部固定）
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(243,244,241,.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-st);
}
.nav .wrap { display: flex; align-items: stretch; justify-content: space-between; }
.nav-toggle { display: none; }
.nav ul {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-wrap: wrap;
}
.nav li { display: flex; }
.nav a {
  display: flex;
  align-items: baseline;
  gap: .5em;
  padding: 16px 18px;
  color: var(--ink);
  font-size: .92rem;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
.nav a .num {
  font-family: var(--mono);
  font-size: .68rem;
  color: var(--mute);
}
.nav a .en {
  font-family: var(--mono);
  font-size: .66rem;
  letter-spacing: .1em;
  color: var(--mute);
  text-transform: uppercase;
  display: none;
}
.nav a:hover { color: var(--steel); border-bottom-color: var(--steel); }
.nav a:hover .num { color: var(--steel); }
.nav a[aria-current="page"] {
  color: var(--steel);
  border-bottom-color: var(--steel);
}
.nav a[aria-current="page"] .num { color: var(--steel); }

/* ============================================================
   ヒーロー（鉄骨ラーメン骨組の線画）
   ============================================================ */
.hero {
  position: relative;
  border-bottom: 1px solid var(--line-st);
  overflow: hidden;
}
.hero .wrap {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 40px;
  align-items: center;
  padding-top: 72px;
  padding-bottom: 72px;
}
.hero-copy .eyebrow { margin-bottom: 22px; }
.hero-title {
  font-size: clamp(2rem, 4.4vw, 3.3rem);
  font-weight: 700;
  letter-spacing: .01em;
  line-height: 1.18;
  color: var(--ink);
  margin-bottom: 10px;
}
.hero-title .accent { color: var(--steel); }
.hero-sub {
  font-family: var(--mono);
  font-size: .82rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mute);
  margin-bottom: 26px;
}
.hero-lead {
  max-width: 46ch;
  color: var(--ink-soft);
  margin-bottom: 30px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: .6em;
  padding: 11px 20px;
  font-size: .9rem;
  font-weight: 500;
  border: 1.5px solid var(--ink);
  color: var(--ink);
  background: transparent;
  transition: all .16s ease;
}
.btn .mono { font-size: .72rem; color: var(--mute); }
.btn:hover { background: var(--ink); color: #fff; }
.btn:hover .mono { color: #9fb4c9; }
.btn-primary {
  border-color: var(--steel);
  background: var(--steel);
  color: #fff;
}
.btn-primary:hover { background: var(--ink); border-color: var(--ink); }

/* 骨組図フレーム */
.hero-figure {
  position: relative;
  display: flex;
  flex-direction: column;
}
.frame-svg { width: 100%; height: auto; }
.frame-svg .member { stroke: var(--steel); stroke-width: 2; fill: none; stroke-linecap: round; }
.frame-svg .brace  { stroke: var(--steel); stroke-width: 1.4; fill: none; opacity: .65; }
.frame-svg .ghost  { stroke: var(--steel); stroke-width: 1.2; fill: none; stroke-dasharray: 4 5; opacity: .32; }
/* 変形図：基部(y=320)を固定して上ほど右へ傾ける（skewで層間変形を表現） */
.frame-svg .ghost-group { transform: translateY(320px) skewX(-6.34deg) translateY(-320px); }
.frame-svg .node   { fill: var(--ink); stroke: none; }
.frame-svg .hinge  { fill: var(--rust); }
.frame-svg .ground { stroke: var(--ink); stroke-width: 1.6; }
.frame-svg .hatch  { stroke: var(--mute); stroke-width: 1; }
.frame-svg .dim    { stroke: var(--line-st); stroke-width: 1; }
.frame-svg text    { font-family: var(--mono); fill: var(--mute); font-size: 11px; }
.frame-svg .arrow  { stroke: #d6342a; stroke-width: 1.8; fill: none; }
.frame-svg .arrow-h{ fill: #d6342a; }

.figure-cap {
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .06em;
  color: var(--mute);
  margin-top: 14px;
  padding-left: 2px;
  line-height: 1.6;
}
.figure-cap .key { color: var(--rust); }

/* 骨組の描画アニメーション（モーション許容時のみ） */
@media (prefers-reduced-motion: no-preference) {
  .frame-svg .member, .frame-svg .brace, .frame-svg .ground {
    stroke-dasharray: 600;
    stroke-dashoffset: 600;
    animation: draw 1.6s ease forwards;
  }
  .frame-svg .brace { animation-delay: .5s; }
  .frame-svg .node, .frame-svg .hinge { opacity: 0; animation: pop .4s ease forwards 1.1s; }
  /* 矢印：線が描かれ、矢じりが続いて現れる */
  .frame-svg .arrow {
    stroke-dasharray: 1;
    stroke-dashoffset: 1;
    animation: draw .55s ease forwards 1.1s;
  }
  .frame-svg .arrow-h { opacity: 0; animation: pop .35s ease forwards 1.5s; }
  /* 破線（変形図）：矢印と同時にスタート。まっすぐ→傾いて変形 */
  .frame-svg .ghost-group {
    opacity: 0;
    transform: translateY(320px) skewX(0deg) translateY(-320px);
    animation: deform .6s ease-out forwards 1.1s;
  }
  @keyframes deform {
    from { transform: translateY(320px) skewX(0deg)     translateY(-320px); opacity: 0; }
    to   { transform: translateY(320px) skewX(-6.34deg) translateY(-320px); opacity: 1; }
  }
  @keyframes draw { to { stroke-dashoffset: 0; } }
  @keyframes pop  { to { opacity: 1; } }
}

/* ============================================================
   セクション共通
   ============================================================ */
.section { padding: 64px 0; border-bottom: 1px solid var(--line); }
.section:last-of-type { border-bottom: none; }
.section-head { margin-bottom: 36px; }
.section-head .eyebrow { margin-bottom: 14px; }
.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: .01em;
}
.section-title .en {
  font-family: var(--mono);
  font-size: .8rem;
  font-weight: 400;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mute);
  margin-left: .9em;
}

/* 左ガター付きレイアウト（製図シート感） */
.sheet { display: grid; grid-template-columns: var(--gutter) 1fr; gap: 0; }
.sheet .rail {
  border-right: 1px solid var(--line-st);
  padding-top: 4px;
  padding-right: 16px;
  text-align: right;
}
.sheet .rail .tick {
  font-family: var(--mono);
  font-size: .68rem;
  color: var(--mute);
  letter-spacing: .08em;
  display: block;
  margin-bottom: 6px;
}
.sheet .body { padding-left: 28px; }

/* ============================================================
   トップ: 新着情報
   ============================================================ */
.news-list { list-style: none; margin: 0; padding: 0; }
.news-item {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 20px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  align-items: baseline;
}
.news-item:last-child { border-bottom: 1px solid var(--line); }
.news-date {
  font-family: var(--mono);
  font-size: .82rem;
  color: var(--steel);
  letter-spacing: .04em;
}
.news-body { color: var(--ink-soft); }
.news-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: .64rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mute);
  border: 1px solid var(--line-st);
  padding: 1px 8px;
  margin-right: 10px;
  vertical-align: 2px;
}

/* ============================================================
   トップ: 研究紹介＋ナビカード
   ============================================================ */
.intro-lead {
  font-size: 1.08rem;
  max-width: 60ch;
  color: var(--ink-soft);
  margin-bottom: 40px;
}
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line-st);
  border: 1px solid var(--line-st);
}
.card {
  background: var(--surface);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: background .15s ease;
}
.card:hover { background: #fbfbf9; }
.card .card-num {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--steel);
}
.card .card-title { font-size: 1.15rem; color: var(--ink); }
.card .card-en {
  font-family: var(--mono);
  font-size: .66rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mute);
}
.card p { font-size: .92rem; color: var(--ink-soft); margin: 4px 0 0; }
.card .card-go {
  margin-top: auto;
  padding-top: 14px;
  font-family: var(--mono);
  font-size: .74rem;
  color: var(--steel);
  letter-spacing: .04em;
}
.card .card-go::after { content: " →"; }

/* ============================================================
   メンバー: スタッフ表＋学生
   ============================================================ */
.staff-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 12px;
  margin-bottom: 56px;
}
.staff-card {
  background: var(--surface);
  border: 1px solid var(--line-st);
  padding: 24px 22px;
}
.staff-card .role {
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 8px;
}
.staff-card .name { font-size: 1.3rem; font-weight: 600; color: var(--ink); }
.staff-card .mail {
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--mute);
  margin-top: 8px;
}
.staff-card .mail::after { content: "arch.eng.osaka-u.ac.jp"; color: var(--line-st); }

/* 学生メンバー（学年ごと） */
.grade-block { margin-bottom: 30px; }
.grade-label {
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 8px;
  margin-bottom: 16px;
}
.grade-label .g {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: .08em;
}
.grade-label .g-en { font-family: var(--mono); font-size: .7rem; color: var(--mute); letter-spacing: .1em; }
.grade-label .count { margin-left: auto; font-family: var(--mono); font-size: .72rem; color: var(--mute); }
.member-row {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px 24px;
}
.member {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
}
.member .m-name { color: var(--ink); font-size: .98rem; }
.member .m-mail { font-family: var(--mono); font-size: .72rem; color: var(--mute); margin-left: auto; }

/* ============================================================
   研究: テーマ一覧・論文
   ============================================================ */
.lead-block {
  border-left: 3px solid var(--steel);
  padding-left: 22px;
  margin-bottom: 48px;
}
.lead-block p { color: var(--ink-soft); margin: 0; max-width: 62ch; }

.theme-list { list-style: none; margin: 0; padding: 0; counter-reset: theme; }
.theme-list li {
  counter-increment: theme;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  align-items: baseline;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  color: var(--ink);
}
.theme-list li:last-child { border-bottom: 1px solid var(--line); }
.theme-list li::before {
  content: counter(theme, decimal-leading-zero);
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--steel);
  letter-spacing: .05em;
}
.theme-list li:hover { color: var(--steel); }

.thesis-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 8px; }
.thesis-chip {
  border: 1.5px solid var(--line-st);
  padding: 14px 22px;
  display: flex;
  flex-direction: column;
  min-width: 160px;
  transition: border-color .15s ease;
}
.thesis-chip:hover { border-color: var(--steel); }
.thesis-chip .t-ja { font-weight: 600; color: var(--ink); }
.thesis-chip .t-en { font-family: var(--mono); font-size: .66rem; letter-spacing: .1em; text-transform: uppercase; color: var(--mute); margin-top: 3px; }

/* ============================================================
   教育: 資料カード
   ============================================================ */
.edu-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border: 1px solid var(--line-st);
  background: var(--surface);
  max-width: 720px;
}
.edu-card .edu-head {
  padding: 22px 26px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: baseline;
  gap: 14px;
}
.edu-card .edu-head .t { font-size: 1.25rem; font-weight: 600; color: var(--ink); }
.edu-card .edu-head .tag {
  font-family: var(--mono); font-size: .64rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--steel); border: 1px solid var(--steel); padding: 2px 8px;
}
.edu-card .edu-body { padding: 22px 26px; color: var(--ink-soft); }
.edu-card .edu-body p { margin: 0 0 16px; }
.edu-note {
  font-family: var(--mono);
  font-size: .74rem;
  color: var(--rust);
  display: flex;
  align-items: center;
  gap: .5em;
}
.edu-note::before { content: "▲"; font-size: .7rem; }

/* ============================================================
   リンク
   ============================================================ */
.link-list { list-style: none; margin: 0; padding: 0; max-width: 760px; }
.link-list li { border-top: 1px solid var(--line); }
.link-list li:last-child { border-bottom: 1px solid var(--line); }
.link-list a {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 20px 6px;
  color: var(--ink);
}
.link-list a:hover { color: var(--steel); }
.link-list .l-main { display: flex; flex-direction: column; gap: 3px; }
.link-list .l-title { font-size: 1.05rem; font-weight: 500; }
.link-list .l-desc { font-size: .85rem; color: var(--mute); }
.link-list .l-url { font-family: var(--mono); font-size: .72rem; color: var(--steel); letter-spacing: .02em; }
.link-list .l-url::after { content: " ↗"; }

/* 外部関連リンク（バナー相当） */
.ext-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line-st);
  border: 1px solid var(--line-st);
  margin-top: 40px;
}
.ext-card {
  background: var(--surface);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.ext-card:hover { background: #fbfbf9; }
.ext-card .e-ja { font-weight: 600; color: var(--ink); }
.ext-card .e-en { font-family: var(--mono); font-size: .66rem; letter-spacing: .1em; text-transform: uppercase; color: var(--steel); }
.ext-card .e-en::after { content: " ↗"; }

/* ============================================================
   ページヘッダー（下層ページ用の細いバンド）
   ============================================================ */
.page-banner {
  background: var(--ink);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.page-banner .wrap { padding: 48px 24px; position: relative; z-index: 1; }
.page-banner .eyebrow { color: #9fb4c9; margin-bottom: 14px; }
.page-banner .eyebrow::before { border-color: #9fb4c9; color: #9fb4c9; }
.page-banner h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: .01em;
}
.page-banner .p-en {
  font-family: var(--mono);
  font-size: .8rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #7e8b98;
  margin-top: 8px;
}
/* バナー背景にうっすら骨組グリッド */
.page-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 40px 40px;
  z-index: 0;
}

/* ============================================================
   フッター
   ============================================================ */
.site-footer {
  background: var(--ink);
  color: #c4ccd4;
  padding: 48px 0 28px;
}
.site-footer .wrap {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
}
.foot-brand .f-en {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #7e8b98;
  margin-bottom: 8px;
}
.foot-brand .f-ja { color: #fff; font-weight: 600; font-size: 1.05rem; line-height: 1.6; }
.foot-addr {
  font-size: .88rem;
  line-height: 1.9;
  color: #aab4bd;
}
.foot-addr .mono { font-family: var(--mono); font-size: .8rem; color: #7e8b98; }
.foot-nav { display: flex; flex-direction: column; gap: 10px; }
.foot-nav a { color: #c4ccd4; font-size: .9rem; }
.foot-nav a:hover { color: #fff; }
.foot-bottom {
  border-top: 1px solid #2a3038;
  margin-top: 36px;
  padding-top: 18px;
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .04em;
  color: #6a7079;
  text-align: center;
}

/* ============================================================
   レスポンシブ
   ============================================================ */
@media (max-width: 900px) {
  :root { --gutter: 44px; }
  .hero .wrap { grid-template-columns: 1fr; gap: 36px; padding-top: 48px; padding-bottom: 48px; }
  .hero-figure { order: 2; }
  .cards { grid-template-columns: 1fr; }
  .ext-grid { grid-template-columns: 1fr; }
  .site-footer .wrap { grid-template-columns: 1fr; gap: 28px; }
  .affil { display: none; }

  /* ナビをトグル式に */
  .nav .wrap { flex-wrap: wrap; }
  .nav-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
    padding: 14px 4px;
    background: none;
    border: none;
    font-family: var(--mono);
    font-size: .78rem;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--ink);
    cursor: pointer;
  }
  .nav-toggle .bars { width: 20px; height: 14px; position: relative; display: inline-block; }
  .nav-toggle .bars::before,
  .nav-toggle .bars::after,
  .nav-toggle .bars span {
    content: ""; position: absolute; left: 0; width: 100%; height: 2px; background: var(--ink); transition: .2s;
  }
  .nav-toggle .bars::before { top: 0; }
  .nav-toggle .bars span { top: 6px; }
  .nav-toggle .bars::after { top: 12px; }
  .nav[data-open="true"] .bars::before { top: 6px; transform: rotate(45deg); }
  .nav[data-open="true"] .bars span { opacity: 0; }
  .nav[data-open="true"] .bars::after { top: 6px; transform: rotate(-45deg); }

  .nav ul {
    flex-basis: 100%;
    flex-direction: column;
    max-height: 0;
    overflow: hidden;
    transition: max-height .28s ease;
  }
  .nav[data-open="true"] ul { max-height: 420px; }
  .nav li { width: 100%; }
  .nav a {
    width: 100%;
    border-bottom: 1px solid var(--line);
    padding: 14px 4px;
  }
  .nav a .en { display: inline; }
}

@media (max-width: 560px) {
  .news-item { grid-template-columns: 1fr; gap: 4px; }
  .theme-list li { grid-template-columns: 40px 1fr; gap: 12px; }
  .sheet { grid-template-columns: 1fr; }
  .sheet .rail { display: none; }
  .sheet .body { padding-left: 0; }
  .member-row { grid-template-columns: 1fr; }
  .member .m-mail { display: none; }
  .brand .mark-ja { font-size: .82rem; }
}