/* サイト全体の見た目。色と文字はここで変えられます。 */
:root {
  --paper: #ffffff;
  --ink: #1d2733;
  --muted: #5c6773;
  --rule: #dfe4e8;
  --accent: #0e5a7a;
  --gutter: 4.5rem;          /* 年を置く左の列の幅 */
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #14191f;
    --ink: #e4e8ec;
    --muted: #9aa5b1;
    --rule: #2c3540;
    --accent: #7cc4e0;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-size: 1.0625rem;
  line-height: 1.62;
}
html[lang="en"] body {
  font-family: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
}
html[lang="ja"] body {
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic Medium",
    "Yu Gothic", "Noto Sans JP", Meiryo, sans-serif;
  font-size: 1rem;
  line-height: 1.8;
}

.page { max-width: 46rem; margin: 0 auto; padding: 0 1.25rem 4rem; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.15em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }

/* ---- 上部のページ切り替え ---- */
.sitenav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; padding: 1.25rem 0 0; font-size: 0.9375rem; }
.sitenav a { text-decoration: none; color: var(--muted); }
.sitenav a:hover { color: var(--accent); text-decoration: underline; }
.sitenav a[aria-current="page"] { color: var(--ink); font-weight: 600; }

/* ---- 名前と所属 ---- */
.profile { display: flex; gap: 1.75rem; align-items: center; margin: 2.75rem 0 2.5rem; }
.profile img { width: 8.25rem; height: 8.25rem; object-fit: cover; border-radius: 4px; flex: none; }
.profile h1 { margin: 0 0 0.4rem; font-size: 2.25rem; line-height: 1.15; font-weight: 600; letter-spacing: -0.01em; }
html[lang="ja"] .profile h1 { font-size: 2rem; letter-spacing: 0.02em; }
.profile .role { margin: 0; color: var(--muted); line-height: 1.45; }
.profile .quick { margin: 0.9rem 0 0; display: flex; flex-wrap: wrap; gap: 0.2rem 1.1rem; }

/* ---- 見出し ---- */
h2 { margin: 2.75rem 0 0.9rem; font-size: 1.375rem; line-height: 1.3; font-weight: 600; }
h1 { margin: 2.5rem 0 1rem; font-size: 1.75rem; line-height: 1.25; font-weight: 600; }
h3 { margin: 1.75rem 0 0.5rem; font-size: 1.0625rem; font-weight: 600; }
p { margin: 0 0 0.9rem; }
.lead { color: var(--muted); }

/* ---- 年つきの一覧(論文・発表など) ---- */
.entries { list-style: none; margin: 0; padding: 0; }
.entries > li { display: grid; grid-template-columns: var(--gutter) 1fr; column-gap: 1rem; padding: 0.45rem 0; }
.entries .when { color: var(--muted); font-variant-numeric: tabular-nums; }
/* 期間つきの一覧(職歴)。左の列の幅は、いちばん長い期間に自動で合わせる */
.entries.wide { display: grid; grid-template-columns: max-content 1fr; column-gap: 1.5rem; }
.entries.wide > li { display: contents; }
.entries.wide > li > * { padding: 0.45rem 0; }
.entries.wide .when { white-space: nowrap; }
.entries.num { --gutter: 1.9rem; }          /* 通し番号つきの一覧 */
.entries.num > li { column-gap: 0.6rem; }
.entries.num .when { text-align: right; }
.sub { margin: 0.25rem 0 0; font-size: 0.9375rem; color: var(--muted); }
.sub a { margin-right: 0.9rem; }
.res { white-space: nowrap; margin-left: 0.35rem; }

/* ---- 文章が長い箇条書き(Ph.D. Supervision) ---- */
.prose { margin: 0; padding-left: 1.15rem; }
ol.prose { padding-left: 1.5rem; }
.prose li { margin: 0.6rem 0; }
.prose ol, .prose ul { margin: 0.4rem 0 0; padding-left: 1.5rem; }
.prose ol li, .prose ul li { margin: 0.35rem 0; }

/* ---- ふつうの箇条書き ---- */
.plain { margin: 0; padding-left: 1.15rem; }
.plain li { padding: 0.2rem 0; }

footer { margin-top: 3.5rem; padding-top: 1rem; border-top: 1px solid var(--rule); color: var(--muted); font-size: 0.875rem; }

@media (max-width: 34rem) {
  .profile { flex-direction: column; align-items: flex-start; gap: 1rem; margin-top: 2rem; }
  .profile h1 { font-size: 1.875rem; }
  .entries > li, .entries.wide > li { grid-template-columns: 1fr; }
  .entries .when:empty { display: none; }
  .entries.wide { grid-template-columns: 1fr; }
  .entries.wide > li > .when { padding-bottom: 0; }
  .entries.wide > li > div { padding-top: 0; }
  .entries .when { font-size: 0.875rem; }
  .entries.num > li { grid-template-columns: var(--gutter) 1fr; }
  .entries.num .when { font-size: inherit; }
}