/* OH-GY — 共有スタイル */

:root {
  --ground: #FFFEF8;
  --ink: #000000;
  --ink-2: rgba(0, 0, 0, .64);
  --rule: rgba(0, 0, 0, .26);
  --wash: rgba(0, 0, 0, .04);
  --frame: rgba(0, 0, 0, .05);
  --focus: #1B5FBF;

  --serif: "Hiragino Mincho ProN", "Yu Mincho", YuMincho, "Noto Serif JP",
           "Noto Serif CJK JP", "Songti SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
          "Yu Gothic Medium", "Yu Gothic", YuGothic, "Noto Sans JP",
          "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas,
          "Noto Sans Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ground: #1A1917;
    --ink: #F2F0EB;
    --ink-2: rgba(242, 240, 235, .66);
    --rule: rgba(242, 240, 235, .30);
    --wash: rgba(242, 240, 235, .055);
    --frame: rgba(242, 240, 235, .07);
    --focus: #8FB8F0;
  }
}

/* 高コントラスト設定の利用者には, 罫線を 3:1 以上まで上げる */
@media (prefers-contrast: more) {
  :root {
    --ink-2: rgba(0, 0, 0, .82);
    --rule: rgba(0, 0, 0, .62);
  }
  @media (prefers-color-scheme: dark) {
    :root {
      --ink-2: rgba(242, 240, 235, .88);
      --rule: rgba(242, 240, 235, .68);
    }
  }
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.9;
  font-feature-settings: "palt" 1;
}

/* 日本語は文節で折り返す。Chrome 119+ が lang="ja" のときだけ効く。
   非対応ブラウザは通常の折り返しになるだけで, 崩れはしない。 */
p, h1, h2, h3, dd, li, figcaption { word-break: auto-phrase; }

main {
  width: 100%;
  max-width: 34rem;
  margin: 0 auto;
  padding: 0 1rem;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: .28em;
}

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

/* キーボード利用者が本文へ飛べるようにする */
.skip {
  position: absolute;
  left: -9999px;
  padding: .75rem 1rem;
  background: var(--ground);
  border: 1px solid var(--ink);
  font-size: .9375rem;
  text-decoration: none;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 10;
}

/* ---------- 表札 ---------- */

.nameplate {
  padding: clamp(3.5rem, 13vw, 6.5rem) 0 clamp(2.5rem, 8vw, 4rem);
  text-align: center;
}

.mark {
  margin: 0;
  line-height: 0;
}

.mark svg {
  display: inline-block;
  width: min(288px, 58vw);
  height: auto;
  color: var(--ink);
}

.reading {
  margin: 1.75rem 0 0;
  font-family: var(--serif);
  font-size: 1rem;
  letter-spacing: .14em;
  color: var(--ink-2);
}

.lede {
  margin: .85rem auto 0;
  max-width: 24rem;
  font-family: var(--serif);
  font-size: 1.3125rem;
  line-height: 2;
}

/* ---------- 節 ---------- */
/* 罫線は下の見出しに属させたいので, 上の余白より下の余白を広くとる */

.band {
  padding: clamp(2.25rem, 7vw, 3.25rem) 0 clamp(3.25rem, 10vw, 5rem);
  border-top: 1px solid var(--rule);
}

.band > h2 {
  margin: 0 0 1.5rem;
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: .015em;
}

.band > p { margin: 0 0 1.1rem; }

.band > p:last-child { margin-bottom: 0; }

/* ---------- 一覧の項目 (Work / Research 共通) ---------- */

.entries {
  display: flex;
  flex-direction: column;
}

.entry {
  display: block;
  padding: 1.75rem 0;
  text-decoration: none;
  border-top: 1px solid var(--rule);
  transition: background-color .12s ease, box-shadow .12s ease;
}

.entry:first-child {
  border-top: 0;
  padding-top: 0;
}

.entry:hover {
  background: var(--wash);
  box-shadow: 0 0 0 1rem var(--wash);
}

/* 製品の実物。16:10 で枠を確保しておくので, 読み込みで行がずれない (CLS 対策) */
.shot {
  display: block;
  margin: 0 0 1rem;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--frame);
  border: 1px solid var(--rule);
}

.shot img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.entry h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.5;
  text-decoration: underline;
  text-decoration-color: transparent;
  text-decoration-thickness: 1px;
  text-underline-offset: .22em;
  transition: text-decoration-color .12s ease;
}

.entry:hover h3,
.entry:focus-visible h3 { text-decoration-color: currentColor; }

.entry p {
  margin: .3rem 0 0;
  color: var(--ink-2);
  font-size: .9375rem;
  line-height: 1.85;
}

.entry .meta {
  display: block;
  margin-top: .5rem;
  font-size: .8125rem;
  letter-spacing: .02em;
  color: var(--ink-2);
}

/* ---------- 連絡先 ---------- */

.contact {
  margin: 0;
  font-size: .9375rem;
}

.contact > div {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: .75rem;
  align-items: baseline;
  border-top: 1px solid var(--rule);
}

.contact > div:first-child { border-top: 0; }

.contact dt {
  padding: .7rem 0;
  color: var(--ink-2);
}

.contact dd { margin: 0; }

/* 指で押せる大きさを確保する (WCAG 2.2 の 2.5.8 は 24px, ここは 44px) */
.contact dd a {
  display: block;
  padding: .7rem 0;
  min-height: 44px;
}

/* ---------- 奥付 ---------- */

footer {
  padding: clamp(2.75rem, 9vw, 4.25rem) 0 clamp(3.5rem, 11vw, 5.5rem);
  border-top: 1px solid var(--rule);
  font-size: .9375rem;
  color: var(--ink-2);
}

footer p { margin: 0 0 1rem; }

footer a {
  display: inline-block;
  padding: .4rem 0;
}

.copyright {
  margin-top: 2rem;
  font-size: .8125rem;
  letter-spacing: .04em;
}

/* ---------- 記事ページ ---------- */

.back {
  display: inline-block;
  margin: clamp(2rem, 7vw, 3rem) 0 0;
  padding: .5rem 0;
  font-size: .875rem;
  color: var(--ink-2);
}

.article-head {
  padding: 1.5rem 0 clamp(1.75rem, 6vw, 2.5rem);
  border-bottom: 1px solid var(--rule);
}

.article-head h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.5rem, 5.5vw, 1.875rem);
  font-weight: 600;
  line-height: 1.55;
}

.article-head .meta {
  display: block;
  margin-top: .75rem;
  font-size: .875rem;
  letter-spacing: .02em;
  color: var(--ink-2);
}

.article-body {
  padding: clamp(2rem, 7vw, 3rem) 0 clamp(3.5rem, 11vw, 5.5rem);
}

.article-body > :first-child { margin-top: 0; }

.article-body h2 {
  margin: 3rem 0 1rem;
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.6;
}

.article-body h3 {
  margin: 2.25rem 0 .75rem;
  font-family: var(--serif);
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.6;
}

.article-body p { margin: 0 0 1.3rem; }

.article-body ul,
.article-body ol {
  margin: 0 0 1.3rem;
  padding-left: 1.4rem;
}

.article-body li { margin-bottom: .35rem; }

.article-body pre {
  margin: 0 0 1.4rem;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  border: 1px solid var(--rule);
  background: var(--wash);
  font-family: var(--mono);
  font-size: .8125rem;
  line-height: 1.75;
}

.article-body code {
  font-family: var(--mono);
  font-size: .875em;
}

.article-body pre code { font-size: inherit; }

.article-body :not(pre) > code {
  padding: .1em .35em;
  border-radius: 2px;
  background: var(--wash);
}

.article-body figure { margin: 0 0 1.4rem; }

.article-body img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--rule);
}

.article-body figcaption {
  margin-top: .5rem;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--ink-2);
}

.article-body blockquote {
  margin: 0 0 1.4rem;
  padding-left: 1rem;
  border-left: 2px solid var(--rule);
  color: var(--ink-2);
}

.article-body table {
  width: 100%;
  margin: 0 0 1.4rem;
  border-collapse: collapse;
  font-size: .9375rem;
}

.article-body th,
.article-body td {
  padding: .55rem .6rem;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
}

.article-body th {
  font-family: var(--serif);
  font-weight: 600;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}