/* ═══════════════════════════════════════════════════════
   戦争を防ぐ提案 ── 課題4
   黒い紙、象牙色の文字、真鍮の組み立て。
   朱は「戦争そのもの」のためだけに取っておく。
   配色は黒の一本。ライトモードは持たない。
   ═══════════════════════════════════════════════════════ */

:root {
  --paper:   #0a0a0c;
  --ink:     #e9e7e1;
  --ink-2:   #a5a399;
  --ink-3:   #6e6d66;
  --rule:    #24252b;
  --rule-2:  #34353d;

  --brass:   #c2a263;          /* 組み立ての色。見出し番号・罫・印 */
  --brass-2: rgba(194, 162, 99, .13);
  --red:     #b5463a;          /* 戦争そのもの。使うのは4か所だけ */
  --red-dim: rgba(181, 70, 58, .15);
  --blue:    #6f9bff;          /* 世界・加盟国 */

  --sheet:     #f1ede3;        /* 原本の紙 */
  --sheet-ink: #1b1c20;
  --sheet-rule:#cdc6b6;

  --serif: "Shippori Mincho B1", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans:  "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Sans", sans-serif;
  --num:   "Shippori Mincho B1", ui-monospace, "SFMono-Regular", monospace;

  --col:  min(100% - 2.6rem, 50rem);
  --ease: cubic-bezier(.22, .68, .24, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  color-scheme: dark;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 2.05;
  font-feature-settings: "palt" 1;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body.is-locked { overflow: hidden; }

/* 紙の粒 */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: 1;
  pointer-events: none; opacity: .4; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E");
}

::selection { background: var(--brass); color: #16160f; }
.col { width: var(--col); margin-inline: auto; }

/* ─────────────────────────────  上の帯 */
#rail { position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 70; background: var(--rule); }
#rail i {
  display: block; height: 100%; width: 100%;
  background: var(--brass); transform: scaleX(0); transform-origin: 0 50%;
  transition: transform .08s linear;
}

#top-bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 60;
  display: flex; align-items: center; gap: .6rem;
  padding: .85rem clamp(1rem, 4vw, 2.2rem);
  font-size: .72rem; letter-spacing: .16em; color: var(--ink-3);
  background: linear-gradient(var(--paper) 40%, transparent);
  pointer-events: none;
}
#top-bar > * { pointer-events: auto; }
#top-bar .tb-title {
  font-family: var(--serif); font-weight: 600; letter-spacing: .1em;
  color: var(--ink-2); text-decoration: none; white-space: nowrap;
}
#top-bar .tb-sp { flex: 1; }

.tb-btn {
  border: 1px solid var(--rule-2); background: transparent; color: var(--ink-2);
  font: inherit; font-size: .72rem; letter-spacing: .14em; cursor: pointer;
  padding: .3rem .75rem; border-radius: 1px; text-decoration: none; white-space: nowrap;
  transition: color .25s, border-color .25s;
}
.tb-btn:hover { color: var(--brass); border-color: var(--brass); }

#menu-btn { display: inline-flex; align-items: center; gap: .45rem; }
#menu-btn i { display: block; width: 14px; height: 1px; background: currentColor; position: relative; }
#menu-btn i::before, #menu-btn i::after {
  content: ""; position: absolute; left: 0; width: 14px; height: 1px; background: currentColor;
}
#menu-btn i::before { top: -4px; } #menu-btn i::after { top: 4px; }

/* ─────────────────────────────  目次 */
#toc {
  position: fixed; inset: 0; z-index: 85;
  background: var(--paper);
  display: grid; place-items: center;
  opacity: 0; visibility: hidden;
  transition: opacity .35s var(--ease), visibility .35s;
  overflow-y: auto;
}
#toc.is-open { opacity: 1; visibility: visible; }
#toc ol { list-style: none; margin: 4rem 0; padding: 0; width: var(--col); }
#toc li { border-top: 1px solid var(--rule); }
#toc li:last-child { border-bottom: 1px solid var(--rule); }
#toc a {
  display: flex; align-items: baseline; gap: 1.2rem;
  padding: clamp(.45rem, 1.6vw, .8rem) .2rem;
  text-decoration: none; color: var(--ink-2);
  transition: color .22s, padding-left .22s;
}
#toc a:hover { color: var(--brass); padding-left: 1rem; }
#toc a b {
  font-family: var(--num); font-size: .78rem; color: var(--brass);
  letter-spacing: .12em; width: 3.2rem; flex: none;
}
#toc a span { font-family: var(--serif); font-size: clamp(1rem, 2.8vw, 1.3rem); font-weight: 600; }
#toc .toc-close { position: fixed; top: 1rem; right: clamp(1rem, 4vw, 2.2rem); }

/* ─────────────────────────────  扉 */
#cover {
  min-height: 100svh;
  display: flex; flex-direction: column; justify-content: center;
  padding: 7rem 0 3rem;
  position: relative;
}
#cover .kicker { font-size: .7rem; letter-spacing: .3em; color: var(--brass); margin: 0 0 clamp(1.4rem, 4vw, 2.4rem); }
#cover h1 {
  font-family: var(--serif); font-weight: 800;
  font-size: clamp(2.3rem, 9vw, 5.4rem);
  line-height: 1.26; letter-spacing: .02em;
  margin: 0 0 1.4rem; text-indent: -.1em;
}
#cover h1 .br { display: block; }
#cover h1 i, #cover h1 em { font-style: normal; color: var(--brass); }
#cover .sub {
  font-family: var(--serif); font-size: clamp(1rem, 3.4vw, 1.5rem);
  color: var(--ink-2); margin: 0 0 clamp(2rem, 6vw, 3.4rem);
  letter-spacing: .06em; font-weight: 600;
}
#cover .meta {
  display: flex; flex-wrap: wrap; gap: .4rem 1.8rem;
  font-size: .78rem; color: var(--ink-3); letter-spacing: .1em;
  padding-top: 1.1rem; border-top: 1px solid var(--rule);
}

/* 原本カード：「ここで開く」と「保存」 */
.origin {
  display: flex; align-items: stretch;
  margin: 0 0 clamp(2.4rem, 7vw, 4rem);
  border: 1px solid var(--rule-2);
}
.origin-open {
  flex: 1; min-width: 0;
  display: flex; align-items: center; gap: clamp(.8rem, 3vw, 1.6rem);
  padding: clamp(.9rem, 2.6vw, 1.3rem) clamp(1rem, 3vw, 1.5rem);
  background: transparent; border: 0; color: inherit; font: inherit;
  text-align: left; cursor: pointer; position: relative; overflow: hidden;
}
.origin-open::after {
  content: ""; position: absolute; inset: 0; background: var(--brass);
  opacity: 0; transform: translateY(101%);
  transition: transform .45s var(--ease), opacity .45s;
}
.origin-open:hover::after { transform: translateY(0); opacity: .07; }
.origin:focus-within { border-color: var(--brass); }
.origin .oi { flex: none; color: var(--brass); }
.origin .oi svg { display: block; width: 1.6rem; height: 1.6rem; }
.origin .om { flex: 1; min-width: 0; line-height: 1.7; }
.origin .ol { display: block; font-size: .64rem; letter-spacing: .26em; color: var(--ink-3); }
.origin .on {
  display: block; font-family: var(--serif); font-weight: 600;
  font-size: clamp(.92rem, 2.6vw, 1.08rem); letter-spacing: .02em;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.origin .os { display: block; font-size: .72rem; color: var(--ink-3); letter-spacing: .06em; }
.origin .od {
  flex: none; display: inline-flex; align-items: center; gap: .5rem;
  font-size: .74rem; letter-spacing: .16em; color: var(--brass);
  border-bottom: 1px solid currentColor; padding-bottom: .15rem;
}
.origin .od svg { width: .85rem; height: .85rem; }
.origin-dl {
  flex: none; display: inline-flex; flex-direction: column;
  align-items: center; justify-content: center; gap: .35rem;
  padding: 0 clamp(.9rem, 2.6vw, 1.3rem);
  border-left: 1px solid var(--rule-2);
  color: var(--ink-3); text-decoration: none;
  font-size: .68rem; letter-spacing: .14em;
  transition: color .25s, background .25s;
}
.origin-dl:hover { color: var(--brass); background: var(--brass-2); }
.origin-dl svg { width: .95rem; height: .95rem; }

@media (max-width: 560px) {
  .origin { flex-wrap: wrap; }
  .origin-open { flex-basis: 100%; }
  .origin .od { font-size: .7rem; }
  .origin-dl {
    flex-basis: 100%; flex-direction: row; gap: .5rem;
    border-left: 0; border-top: 1px solid var(--rule-2); padding: .7rem;
  }
}

.scroll-cue {
  position: absolute; bottom: 1.6rem; left: 0;
  font-size: .64rem; letter-spacing: .3em; color: var(--ink-3);
  display: flex; align-items: center; gap: .7rem;
}
.scroll-cue i { display: block; width: 40px; height: 1px; background: var(--rule-2); position: relative; overflow: hidden; }
.scroll-cue i::after {
  content: ""; position: absolute; inset: 0; background: var(--brass);
  animation: cue 2.4s var(--ease) infinite;
}
@keyframes cue { 0% { transform: translateX(-100%); } 60%, 100% { transform: translateX(100%); } }
@media (prefers-reduced-motion: reduce) { .scroll-cue i::after { animation: none; } }

/* ─────────────────────────────  紙の節 */
.sec { padding: clamp(4rem, 12vw, 9rem) 0 clamp(2rem, 6vw, 4rem); position: relative; }

.sec-head { margin-bottom: clamp(2rem, 6vw, 3.4rem); }
.sec-head .rule {
  display: block; height: 1px; background: var(--rule-2);
  transform: scaleX(0); transform-origin: 0 50%;
  transition: transform 1.1s var(--ease);
  margin-bottom: 1.3rem;
}
.in .sec-head .rule, .sec-head.in .rule { transform: scaleX(1); }
.sec-head .no { display: block; font-family: var(--num); font-size: .7rem; letter-spacing: .3em; color: var(--brass); margin-bottom: .9rem; }
.sec-head h2 {
  font-family: var(--serif); font-weight: 800;
  font-size: clamp(1.5rem, 5.2vw, 2.6rem); line-height: 1.5;
  letter-spacing: .02em; margin: 0;
}
.sec-head .lead { margin: .9rem 0 0; font-size: .84rem; color: var(--ink-3); letter-spacing: .08em; }

.prose p { margin: 0 0 1.6rem; font-size: clamp(.92rem, 2.3vw, 1rem); line-height: 2.15; color: var(--ink-2); }
.prose p:last-child { margin-bottom: 0; }

.bullets { list-style: none; margin: 1.2rem 0 0; padding: 0; }
.bullets li {
  position: relative; padding: 1rem 0 1rem 1.4rem; border-top: 1px solid var(--rule);
  font-size: .88rem; line-height: 2.05; color: var(--ink-2);
}
.bullets li::before { content: ""; position: absolute; left: 0; top: 1.95em; width: .6rem; height: 1px; background: var(--brass); }
.bullets li b { color: var(--ink); font-weight: 700; }

/* ─────────────────────────────  地球儀の舞台 */
#stage3d { position: relative; z-index: 2; background: transparent; height: calc(var(--stage-vh, 3000) * 1vh); }
#globe { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; opacity: 0; pointer-events: none; }
#labels { position: fixed; inset: 0; z-index: 2; pointer-events: none; }

.lbl {
  position: absolute; top: 0; left: 0;
  font-size: .68rem; letter-spacing: .14em; white-space: nowrap;
  color: var(--ink); opacity: 0; visibility: hidden;
  padding: .12rem .5rem;
  background: color-mix(in srgb, var(--paper) 72%, transparent);
  border: 1px solid var(--rule-2);
  backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px);
}
.lbl.is-war  { color: var(--red); border-color: color-mix(in srgb, var(--red) 55%, transparent); }
.lbl.is-gold { color: var(--brass); border-color: color-mix(in srgb, var(--brass) 55%, transparent); }
.lbl.is-sm   { font-size: .62rem; letter-spacing: .1em; }

/* キャプションの下敷き（画面いっぱい） */
#scrim { position: fixed; inset: 0; z-index: 1; pointer-events: none; opacity: 0; will-change: opacity; }
#scrim.l {
  background: linear-gradient(97deg, var(--paper) 0%,
    color-mix(in srgb, var(--paper) 97%, transparent) 20%,
    color-mix(in srgb, var(--paper) 86%, transparent) 32%,
    color-mix(in srgb, var(--paper) 44%, transparent) 48%, transparent 68%);
}
#scrim.r {
  background: linear-gradient(263deg, var(--paper) 0%,
    color-mix(in srgb, var(--paper) 97%, transparent) 20%,
    color-mix(in srgb, var(--paper) 86%, transparent) 32%,
    color-mix(in srgb, var(--paper) 44%, transparent) 48%, transparent 68%);
}
#scrim.m {
  background: radial-gradient(ellipse 58% 52% at 50% 50%, var(--paper) 0%, var(--paper) 30%,
    color-mix(in srgb, var(--paper) 82%, transparent) 58%,
    color-mix(in srgb, var(--paper) 34%, transparent) 82%, transparent 100%);
}

#stage3d .ch { position: sticky; top: 0; height: 100svh; pointer-events: none; }
#stage3d .cap {
  position: absolute; z-index: 3;
  left: clamp(1.3rem, 5vw, 4rem);
  bottom: clamp(3.2rem, 11vh, 7rem);
  width: min(100% - 2.6rem, 27rem);
  opacity: 0; visibility: hidden; pointer-events: none;
  will-change: opacity, transform;
}
#stage3d .cap.r { left: auto; right: clamp(1.3rem, 5vw, 4rem); }
#stage3d .cap.mid {
  top: 50%; bottom: auto; transform: translate3d(0, -50%, 0);
  left: 50%; margin-left: -17rem; width: min(100% - 2.6rem, 34rem);
  text-align: center;
}
@media (max-width: 899px) { #stage3d .cap.mid { left: 1.3rem; margin-left: 0; } }

.cap .cno { display: block; font-family: var(--num); font-size: .66rem; letter-spacing: .3em; color: var(--brass); margin-bottom: .8rem; }
.cap h3 {
  font-family: var(--serif); font-weight: 800;
  font-size: clamp(1.2rem, 4.2vw, 1.85rem); line-height: 1.55;
  margin: 0 0 .9rem; letter-spacing: .02em;
  text-shadow: 0 2px 24px var(--paper), 0 1px 3px var(--paper);
}
.cap h3 em { font-style: normal; color: var(--red); }
.cap h3 i  { font-style: normal; color: var(--brass); }
.cap p {
  margin: 0; font-size: clamp(.82rem, 2.3vw, .92rem); line-height: 2.05; color: var(--ink-2);
  text-shadow: 0 2px 20px var(--paper), 0 1px 2px var(--paper);
}
.cap p + p { margin-top: .8rem; }
.cap .src { display: block; margin-top: .9rem; font-size: .7rem; color: var(--ink-3); letter-spacing: .08em; }

.cap .verdict { display: inline-flex; align-items: baseline; gap: .6rem; font-family: var(--serif); font-weight: 800; margin-bottom: .8rem; letter-spacing: .1em; }
.cap .verdict b { font-size: 1.9rem; line-height: 1; }
.cap .verdict span { font-size: .76rem; letter-spacing: .14em; }
.cap .verdict.p b, .cap .verdict.p span { color: var(--brass); }
.cap .verdict.f b, .cap .verdict.f span { color: var(--red); }

.clock {
  display: inline-flex; align-items: baseline; gap: .7rem;
  margin: .2rem 0 1rem; padding: .5rem .9rem;
  border: 1px solid var(--brass); color: var(--brass); background: var(--brass-2);
}
.clock b { font-family: var(--num); font-size: 1.7rem; line-height: 1; letter-spacing: .06em; font-weight: 700; }
.clock b.is-zero { color: var(--red); }
.clock span { font-size: .66rem; letter-spacing: .2em; }

.cap ul { list-style: none; margin: .6rem 0 0; padding: 0; }
.cap ul li {
  position: relative; padding-left: 1.1rem; margin-bottom: .5rem;
  font-size: clamp(.78rem, 2.1vw, .86rem); line-height: 1.95; color: var(--ink-2);
  text-shadow: 0 2px 20px var(--paper);
}
.cap ul li::before { content: ""; position: absolute; left: 0; top: .85em; width: .42rem; height: 1px; background: var(--brass); }

/* 章の表示 */
#gl-hud {
  position: fixed; z-index: 3;
  right: clamp(1.3rem, 5vw, 2.4rem); top: 50%; transform: translateY(-50%);
  display: flex; flex-direction: column; align-items: flex-end; gap: .5rem;
  font-size: .64rem; letter-spacing: .2em; color: var(--ink-3);
  opacity: 0; pointer-events: none;
}
#gl-hud .idx { font-family: var(--num); font-size: 1.5rem; color: var(--brass); letter-spacing: .06em; line-height: 1; }
#gl-hud .nm { writing-mode: vertical-rl; letter-spacing: .32em; color: var(--ink-2); font-size: .68rem; height: 7rem; }
#gl-hud .bar { width: 1px; height: 5rem; background: var(--rule-2); position: relative; overflow: hidden; }
#gl-hud .bar i { position: absolute; inset: 0; background: var(--brass); transform-origin: 50% 0; transform: scaleX(0); }
@media (max-width: 760px) { #gl-hud { display: none; } }

@media (max-width: 760px) {
  #scrim.l, #scrim.r, #scrim.m {
    background: linear-gradient(to top, var(--paper) 0%, var(--paper) 26%,
      color-mix(in srgb, var(--paper) 86%, transparent) 42%,
      color-mix(in srgb, var(--paper) 40%, transparent) 58%, transparent 76%);
  }
  #stage3d .cap, #stage3d .cap.r, #stage3d .cap.mid {
    left: 1.3rem; right: 1.3rem; width: auto; margin-left: 0;
    top: auto; bottom: clamp(2.4rem, 8vh, 4rem); text-align: left;
  }
}

/* 紙の節は地球儀の上に乗せる */
main > section, main > footer { position: relative; z-index: 3; background: var(--paper); }

/* ─────────────────────────────  原本ビューア */
#genbun {
  position: fixed; inset: 0; z-index: 90;
  display: flex; flex-direction: column;
  background: color-mix(in srgb, var(--paper) 94%, #000);
  opacity: 0; visibility: hidden;
  transition: opacity .32s var(--ease), visibility .32s;
}
#genbun.is-open { opacity: 1; visibility: visible; }

.gb-bar {
  flex: none; display: flex; align-items: center; gap: .6rem;
  padding: .8rem clamp(1rem, 4vw, 2.2rem);
  border-bottom: 1px solid var(--rule);
  font-size: .72rem; letter-spacing: .14em; color: var(--ink-3);
  background: var(--paper);
}
.gb-bar .gb-t {
  font-family: var(--serif); color: var(--ink-2); letter-spacing: .08em;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.gb-bar .gb-sp { flex: 1; }
@media (max-width: 560px) { .gb-bar .gb-t { font-size: .66rem; } }

.gb-scrollarea {
  flex: 1; overflow-y: auto; overscroll-behavior: contain;
  padding: clamp(1.2rem, 4vw, 3rem) clamp(.8rem, 3vw, 2rem) 6rem;
  -webkit-overflow-scrolling: touch;
}

.gb-sheet {
  max-width: 48rem; margin-inline: auto;
  background: var(--sheet); color: var(--sheet-ink);
  padding: clamp(1.6rem, 5vw, 4rem) clamp(1.2rem, 4.5vw, 3.4rem);
  box-shadow: 0 1px 2px rgba(0,0,0,.3), 0 30px 70px -30px rgba(0,0,0,.8);
  font-size: 15px; line-height: 1.95;
  transform: translateY(14px); opacity: 0;
  transition: transform .5s var(--ease) .06s, opacity .5s var(--ease) .06s;
}
#genbun.is-open .gb-sheet { transform: none; opacity: 1; }

.gb-sheet .gb-wait { color: #8a8678; text-align: center; letter-spacing: .14em; font-size: .78rem; }
.gb-sheet h1 {
  font-family: var(--serif); font-size: clamp(1.4rem, 4.4vw, 2rem); font-weight: 800;
  margin: 0 0 .4rem; letter-spacing: .03em; line-height: 1.5;
}
.gb-sheet h2 {
  font-family: var(--serif); font-size: clamp(1.1rem, 3.2vw, 1.35rem); font-weight: 700;
  margin: 2.8rem 0 1rem; padding-bottom: .5rem; letter-spacing: .03em; line-height: 1.6;
  border-bottom: 2px solid var(--sheet-ink);
}
.gb-sheet h3 {
  font-family: var(--serif); font-size: clamp(1rem, 2.8vw, 1.12rem); font-weight: 700;
  margin: 2rem 0 .8rem; letter-spacing: .03em; line-height: 1.7;
}
.gb-sheet h4 {
  font-family: var(--serif); font-size: 1rem; font-weight: 700;
  margin: 1.8rem 0 .7rem; padding-left: .8rem; line-height: 1.7;
  border-left: 3px solid #b8a05c;
}
.gb-sheet p { margin: 0 0 1.1rem; }
.gb-sheet b { font-weight: 700; }
.gb-sheet a { color: #2f5fc0; text-underline-offset: .2em; word-break: break-all; }
.gb-sheet blockquote {
  margin: 0 0 1.4rem; padding: 1rem 1.2rem;
  border: 1px solid var(--sheet-rule); background: rgba(0,0,0,.025);
}
.gb-sheet ol { margin: 0 0 1.2rem; padding-left: 1.6rem; }
.gb-sheet li { margin-bottom: .5rem; }
.gb-sheet figure { margin: 1.6rem 0; }
.gb-sheet img { display: block; width: 100%; height: auto; border: 1px solid var(--sheet-rule); }
.gb-sheet .gb-tab { display: inline-block; width: 1.6em; }
.gb-scroll { overflow-x: auto; margin: 0 0 1.6rem; -webkit-overflow-scrolling: touch; }
.gb-sheet table { border-collapse: collapse; width: 100%; min-width: 30rem; font-size: 13px; line-height: 1.85; }
.gb-sheet th, .gb-sheet td {
  border: 1px solid var(--sheet-rule); padding: .55rem .7rem;
  vertical-align: top; text-align: left;
}
.gb-sheet th { background: rgba(0,0,0,.05); font-weight: 700; }
.gb-sheet th.nw, .gb-sheet td.nw { white-space: nowrap; }
.gb-sheet td:first-child { font-weight: 600; }
/* 横に長い表は、はみ出しているのがわかるように縁をつける */
.gb-scroll { border-left: 1px solid transparent; border-right: 1px solid transparent; }
.gb-scroll::-webkit-scrollbar { height: 6px; }
.gb-scroll::-webkit-scrollbar-thumb { background: var(--sheet-rule); border-radius: 3px; }

/* ─────────────────────────────  奥付 */
.colophon {
  padding: clamp(3rem, 9vw, 6rem) 0 clamp(2rem, 6vw, 4rem);
  border-top: 1px solid var(--rule-2);
  font-size: .76rem; color: var(--ink-3); letter-spacing: .08em; line-height: 2.1;
}
.colophon .cx { display: flex; flex-wrap: wrap; gap: 1rem 2rem; align-items: center; }
.colophon .cx a, .colophon .cx .foot-open {
  display: inline-flex; align-items: center; gap: .5rem;
  color: var(--brass); text-decoration: none; cursor: pointer;
  background: transparent; border: 0; border-bottom: 1px solid currentColor;
  padding: 0 0 .15rem; font: inherit; letter-spacing: .08em;
}
.colophon .cx a:hover, .colophon .cx .foot-open:hover { color: var(--ink); }
.colophon .cx svg { width: .8rem; height: .8rem; }

/* ─────────────────────────────  あらわれ方 */
.rv { opacity: 0; transform: translateY(14px); transition: opacity .75s var(--ease), transform .75s var(--ease); }
.rv.in { opacity: 1; transform: none; }
.rv-d1 { transition-delay: .06s; } .rv-d2 { transition-delay: .12s; }
.rv-d3 { transition-delay: .18s; } .rv-d4 { transition-delay: .24s; }

@media (prefers-reduced-motion: reduce) {
  .rv { opacity: 1; transform: none; transition: none; }
  .sec-head .rule { transform: scaleX(1); transition: none; }
  .gb-sheet { opacity: 1; transform: none; transition: none; }
}

@media print {
  #globe, #labels, #gl-hud, #rail, #top-bar, #toc, #scrim, .scroll-cue, #genbun { display: none !important; }
  #stage3d { height: auto !important; }
  #stage3d .ch { position: static; height: auto; page-break-inside: avoid; }
  #stage3d .cap { position: static; opacity: 1 !important; visibility: visible !important; width: auto; transform: none !important; margin-bottom: 2rem; }
  body { background: #fff; color: #000; }
}