@charset "UTF-8";
/* ==========================================================================
   一般社団法人持続する平和を科学する — Institute for Sustainable Peace
   白基調・黒文字。アクセント色を持たない、罫線と級数差だけで構造を作る組版。
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. トークン
   -------------------------------------------------------------------------- */
:root {
  /* 色：白と黒とその間だけ。グレーは AA（4.5:1）を満たす範囲に留める */
  --paper:      #ffffff;
  --paper-sub:  #fafafa;
  --ink:        #0a0a0a;
  --ink-70:     #3d3d3d;
  --ink-50:     #767676; /* on #fff = 4.54:1 */
  --rule:       #e2e2e2;
  --rule-mid:   #c7c7c7;

  /* 書体：Webフォントを使わない。理念と見出しは明朝、本文はゴシック */
  --serif: "Hiragino Mincho ProN", "Hiragino Mincho Pro", "Yu Mincho", YuMincho,
           "Noto Serif JP", "Source Han Serif JP", "Times New Roman", serif;
  --sans:  -apple-system, BlinkMacSystemFont, "Hiragino Sans",
           "Hiragino Kaku Gothic ProN", "Yu Gothic", YuGothic,
           "Noto Sans JP", "Helvetica Neue", Arial, sans-serif;
  --mono:  ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* 寸法 */
  --w-max:    1120px;
  --w-prose:  720px;
  --pad:      clamp(20px, 5vw, 40px);
  --sec:      clamp(72px, 11vw, 136px);
  --header-h: 74px;
}

/* --------------------------------------------------------------------------
   2. リセット
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 2;
  font-feature-settings: "palt" 1;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
table { border-collapse: collapse; width: 100%; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
}

/* --------------------------------------------------------------------------
   3. 共通レイアウト
   -------------------------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.prose { max-width: var(--w-prose); }

.section { padding-block: var(--sec); }
.section + .section { border-top: 1px solid var(--rule); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  padding: 12px 20px;
  font-size: 14px;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   4. タイポグラフィ
   -------------------------------------------------------------------------- */

/* セクションラベル：小さく、字間を開いた通し番号 */
.label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  line-height: 1;
  color: var(--ink-50);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}
.label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--rule);
}

/* 見出し */
.h-display {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(30px, 6.4vw, 60px);
  line-height: 1.42;
  letter-spacing: .02em;
  text-wrap: balance;
}

.h-section {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.6;
  letter-spacing: .02em;
  text-wrap: balance;
}

.h-sub {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.75;
  letter-spacing: .02em;
}

.lede {
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 2.15;
  color: var(--ink-70);
}

.body-text { line-height: 2.15; color: var(--ink-70); }
.body-text + .body-text { margin-top: 1.6em; }

.note {
  font-size: 13px;
  line-height: 1.95;
  color: var(--ink-50);
}

.en {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink-50);
  text-transform: uppercase;
}

/* 明朝の引用・宣言文 */
.statement {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(19px, 2.7vw, 27px);
  line-height: 1.95;
  letter-spacing: .02em;
  text-wrap: pretty;
}

/* --------------------------------------------------------------------------
   5. ヘッダー
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: var(--header-h);
}

.brand {
  display: block;
  text-decoration: none;
  padding-block: 14px;
}
.brand__ja {
  display: block;
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.4;
  letter-spacing: .04em;
  white-space: nowrap;
}
.brand__en {
  display: block;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .14em;
  color: var(--ink-50);
  text-transform: uppercase;
  margin-top: 3px;
  white-space: nowrap;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.4vw, 32px);
}
.nav__link {
  font-size: 13px;
  letter-spacing: .05em;
  text-decoration: none;
  padding-block: 6px;
  border-bottom: 1px solid transparent;
  transition: border-color .18s ease;
}
.nav__link:hover { border-bottom-color: var(--ink); }
.nav__link[aria-current="page"] { border-bottom-color: var(--ink); }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  margin-right: -10px;
  padding: 0;
  background: none;
  border: 0;
  cursor: pointer;
  position: relative;
}
.nav-toggle__bar {
  position: absolute;
  left: 11px;
  width: 22px;
  height: 1px;
  background: var(--ink);
  transition: transform .22s ease, opacity .22s ease;
}
.nav-toggle__bar:nth-child(1) { top: 17px; }
.nav-toggle__bar:nth-child(2) { top: 22px; }
.nav-toggle__bar:nth-child(3) { top: 27px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
    max-height: 0;
    overflow: hidden;
    transition: max-height .28s ease;
  }
  .nav[data-open="true"] { max-height: calc(100dvh - var(--header-h)); }
  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px var(--pad) 32px;
  }
  .nav__link {
    display: block;
    padding: 16px 0;
    font-size: 15px;
    border-bottom: 1px solid var(--rule);
  }
  .nav__link:hover,
  .nav__link[aria-current="page"] { border-bottom-color: var(--rule); }
  .nav__link[aria-current="page"]::before { content: "— "; color: var(--ink-50); }
}

/* --------------------------------------------------------------------------
   6. ヒーロー／ページヘッド
   -------------------------------------------------------------------------- */
.hero {
  padding-block: clamp(80px, 15vw, 176px) clamp(64px, 10vw, 120px);
  border-bottom: 1px solid var(--rule);
}
.hero__title { margin-bottom: 40px; }
.hero__sub {
  font-family: var(--serif);
  font-size: clamp(15px, 1.9vw, 19px);
  line-height: 2;
  letter-spacing: .03em;
  color: var(--ink-70);
  max-width: 40em;
}
.hero__meta {
  margin-top: clamp(48px, 8vw, 88px);
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 32px;
}

.page-head {
  padding-block: clamp(56px, 9vw, 104px) clamp(40px, 6vw, 64px);
  border-bottom: 1px solid var(--rule);
}
.page-head__title { margin-bottom: 28px; }
.page-head__lede { max-width: var(--w-prose); }

/* パンくず */
.crumbs {
  font-size: 12px;
  color: var(--ink-50);
  padding-top: 20px;
}
.crumbs a { text-decoration: none; border-bottom: 1px solid var(--rule); }
.crumbs a:hover { border-bottom-color: var(--ink); }
.crumbs span { margin-inline: 8px; }

/* --------------------------------------------------------------------------
   7. 罫線グリッド（四本柱・カード類）
   -------------------------------------------------------------------------- */
.grid {
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.grid > * {
  background: var(--paper);
  padding: clamp(28px, 4vw, 44px);
}
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 860px) { .grid--3 { grid-template-columns: 1fr; } }
@media (max-width: 640px) { .grid--2 { grid-template-columns: 1fr; } }

.pillar__no {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink-50);
  margin-bottom: 20px;
}
.pillar__name {
  font-family: var(--serif);
  font-size: clamp(21px, 2.6vw, 26px);
  line-height: 1.5;
  letter-spacing: .04em;
  margin-bottom: 6px;
}
.pillar__gloss {
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--ink-50);
  margin-bottom: 22px;
}
.pillar__desc { font-size: 14.5px; line-height: 2.05; color: var(--ink-70); }

/* --------------------------------------------------------------------------
   8. 連番リスト（活動・体制）
   -------------------------------------------------------------------------- */
.stack { border-top: 1px solid var(--ink); }

.item {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 0 32px;
  padding-block: clamp(28px, 4vw, 40px);
  border-bottom: 1px solid var(--rule);
}
@media (max-width: 720px) {
  .item { grid-template-columns: 1fr; gap: 14px; }
}

.item__no {
  font-family: var(--serif);
  font-size: clamp(30px, 4.6vw, 44px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--ink);
  font-variant-numeric: lining-nums;
}
.item__body { max-width: 46em; }
.item__title {
  font-family: var(--serif);
  font-size: clamp(17px, 2.1vw, 21px);
  line-height: 1.7;
  letter-spacing: .03em;
  margin-bottom: 12px;
}
.item__desc { font-size: 14.5px; line-height: 2.1; color: var(--ink-70); }
.item__tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--ink-50);
  margin-top: 14px;
}

/* 層の見出し */
.layer-head {
  margin-top: clamp(56px, 8vw, 88px);
  margin-bottom: 32px;
}
.layer-head:first-of-type { margin-top: 0; }
.layer-head__key {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 5px 11px;
  display: inline-block;
  margin-bottom: 18px;
}
.layer-head__name {
  font-family: var(--serif);
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.6;
  letter-spacing: .03em;
  margin-bottom: 10px;
}
.layer-head__desc { font-size: 14px; color: var(--ink-50); }

/* --------------------------------------------------------------------------
   9. 問いと答え（理念ページ）
   -------------------------------------------------------------------------- */
.qa { border-top: 1px solid var(--ink); }
.qa__block {
  padding-block: clamp(40px, 6vw, 64px);
  border-bottom: 1px solid var(--rule);
}
.qa__q {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink-50);
  margin-bottom: 16px;
}
.qa__question {
  font-family: var(--serif);
  font-size: clamp(19px, 2.6vw, 25px);
  line-height: 1.8;
  letter-spacing: .03em;
  margin-bottom: 32px;
}
.qa__answer {
  border-left: 1px solid var(--ink);
  padding-left: clamp(20px, 3vw, 32px);
  max-width: 42em;
}
.qa__headline {
  font-family: var(--serif);
  font-size: clamp(17px, 2.1vw, 20px);
  line-height: 1.8;
  letter-spacing: .03em;
  margin-bottom: 20px;
}

/* --------------------------------------------------------------------------
   10. 定義表
   -------------------------------------------------------------------------- */
.deftable { border-top: 1px solid var(--ink); }
.deftable tr { border-bottom: 1px solid var(--rule); }
.deftable th,
.deftable td {
  text-align: left;
  vertical-align: top;
  padding-block: 24px;
  font-weight: 400;
  font-size: 14.5px;
  line-height: 2.05;
}
.deftable th {
  width: 190px;
  padding-right: 24px;
  color: var(--ink);
  letter-spacing: .06em;
  white-space: nowrap;
}
.deftable td { color: var(--ink-70); }
@media (max-width: 640px) {
  .deftable th, .deftable td { display: block; width: auto; white-space: normal; }
  .deftable th { padding-block: 22px 4px; }
  .deftable td { padding-block: 0 22px; }
}

/* --------------------------------------------------------------------------
   10b. 役員
   -------------------------------------------------------------------------- */
.officers { border-top: 1px solid var(--ink); }

.officer {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 0 clamp(28px, 4vw, 48px);
  align-items: start;
  padding-block: clamp(36px, 5vw, 56px);
  border-bottom: 1px solid var(--rule);
}
@media (max-width: 720px) {
  .officer { grid-template-columns: 1fr; gap: 24px; }
  .officer__photo { max-width: 180px; }
}

.officer__photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: var(--paper-sub);
}

.officer__role {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  line-height: 1;
  color: var(--ink-50);
  margin-bottom: 16px;
}
.officer__name {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(21px, 2.6vw, 26px);
  line-height: 1.4;
  letter-spacing: .05em;
}
.officer__name-en {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ink-50);
  margin-top: 9px;
}
.officer__affil {
  font-size: 13px;
  line-height: 1.9;
  color: var(--ink-70);
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
}
.officer__bio { margin-top: 20px; max-width: 44em; }
.officer__bio p {
  font-size: 14.5px;
  line-height: 2.1;
  color: var(--ink-70);
}
.officer__bio p + p { margin-top: 1.5em; }

/* --------------------------------------------------------------------------
   10c. 規程ページ（プライバシーポリシー等）
   -------------------------------------------------------------------------- */
.item__body > .item__desc + .item__desc,
.item__body > .item__desc + .deftable,
.item__body > .deftable + .item__desc,
.item__body > .item__desc + ul { margin-top: 1.4em; }

.item__body ul.phase__list li { font-size: 14.5px; }

.inline-link {
  text-decoration: none;
  border-bottom: 1px solid var(--rule-mid);
}
.inline-link:hover { border-bottom-color: var(--ink); }

.doc-meta {
  margin-top: clamp(40px, 6vw, 64px);
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  font-size: 13px;
  line-height: 1.95;
  color: var(--ink-50);
}

/* --------------------------------------------------------------------------
   11. ロードマップ
   -------------------------------------------------------------------------- */
.phase {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 0 32px;
  padding-block: clamp(28px, 4vw, 36px);
  border-bottom: 1px solid var(--rule);
}
.phase:first-child { border-top: 1px solid var(--ink); }
@media (max-width: 720px) { .phase { grid-template-columns: 1fr; gap: 12px; } }
.phase__when {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ink-50);
  padding-top: 6px;
}
.phase__name {
  font-family: var(--serif);
  font-size: clamp(17px, 2vw, 20px);
  letter-spacing: .04em;
  margin-bottom: 14px;
}
.phase__list { font-size: 14.5px; line-height: 2.05; color: var(--ink-70); }
.phase__list li { padding-left: 1.1em; text-indent: -1.1em; }
.phase__list li::before { content: "— "; color: var(--ink-50); }

/* --------------------------------------------------------------------------
   12. リンク・ボタン
   -------------------------------------------------------------------------- */
.link {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  font-size: 14px;
  letter-spacing: .05em;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 3px;
  transition: opacity .18s ease;
}
.link:hover { opacity: .55; }
.link::after { content: "→"; font-size: 12px; }

.btn {
  display: inline-block;
  text-decoration: none;
  font-size: 14px;
  letter-spacing: .08em;
  padding: 17px 40px;
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  transition: background-color .2s ease, color .2s ease;
}
.btn:hover { background: var(--ink); color: var(--paper); }

/* 大きな遷移ブロック */
.next {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--rule);
  border-block: 1px solid var(--rule);
}
@media (max-width: 640px) { .next { grid-template-columns: 1fr; } }
.next__item {
  background: var(--paper);
  padding: clamp(32px, 5vw, 56px);
  text-decoration: none;
  transition: background-color .2s ease;
}
.next__item:hover { background: var(--paper-sub); }
.next__label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  color: var(--ink-50);
  margin-bottom: 16px;
}
.next__title {
  font-family: var(--serif);
  font-size: clamp(19px, 2.4vw, 24px);
  letter-spacing: .03em;
  line-height: 1.6;
}
.next__desc { font-size: 13.5px; color: var(--ink-50); margin-top: 12px; }

/* --------------------------------------------------------------------------
   13. お知らせ
   -------------------------------------------------------------------------- */
.news { border-top: 1px solid var(--ink); }
.news__item {
  display: grid;
  grid-template-columns: 130px 110px 1fr;
  gap: 0 24px;
  align-items: baseline;
  padding-block: 26px;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
}
@media (max-width: 720px) {
  .news__item { grid-template-columns: 1fr; gap: 8px; }
}
.news__date {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-50);
}
.news__cat {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--ink-50);
  border: 1px solid var(--rule-mid);
  padding: 3px 0;
  text-align: center;
  justify-self: start;
  min-width: 96px;
}
.news__title { font-size: 15px; line-height: 1.9; }
.news__empty {
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--rule);
  padding-block: clamp(56px, 9vw, 96px);
  text-align: center;
  color: var(--ink-50);
  font-size: 14.5px;
}

/* --------------------------------------------------------------------------
   14. フッター
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--ink);
  padding-block: clamp(56px, 8vw, 88px) 40px;
}
.site-footer__top {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(40px, 6vw, 72px);
  padding-bottom: clamp(40px, 6vw, 64px);
}
@media (max-width: 780px) { .site-footer__top { grid-template-columns: 1fr; } }

.site-footer__ja {
  font-family: var(--serif);
  font-size: clamp(17px, 2.2vw, 21px);
  letter-spacing: .04em;
  line-height: 1.6;
}
.site-footer__en {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  color: var(--ink-50);
  text-transform: uppercase;
  margin-top: 8px;
}
.site-footer__tagline {
  font-family: var(--serif);
  font-size: 14px;
  color: var(--ink-70);
  margin-top: 24px;
  letter-spacing: .03em;
}

.fnav {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px 24px;
  align-content: start;
}
.fnav a {
  font-size: 13.5px;
  text-decoration: none;
  padding-block: 7px;
  display: inline-block;
  border-bottom: 1px solid transparent;
}
.fnav a:hover { border-bottom-color: var(--ink); }

.site-footer__bottom {
  border-top: 1px solid var(--rule);
  padding-top: 28px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 24px;
}
.copyright {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: var(--ink-50);
}

/* --------------------------------------------------------------------------
   15. ユーティリティ
   -------------------------------------------------------------------------- */
.mt-xs { margin-top: 16px; }
.mt-s  { margin-top: 24px; }
.mt-m  { margin-top: 40px; }
.mt-l  { margin-top: clamp(48px, 7vw, 80px); }
.rule-top { border-top: 1px solid var(--rule); padding-top: clamp(32px, 5vw, 48px); }
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* 印刷 */
@media print {
  .site-header, .nav-toggle, .next, .skip-link { display: none !important; }
  body { font-size: 11pt; line-height: 1.8; }
  .section { padding-block: 24pt; }
  a { text-decoration: none; }
}