/* Tosho Hirasawa — profile page.
   Self-contained: no webfonts, no CDN, no JavaScript. */

:root {
  --bg: #ffffff;
  --fg: #1c1f24;
  --muted: #6a7280;
  --rule: #e3e6ea;
  --accent: #244a7a;
  --chip-bg: #f2f4f7;
  --chip-fg: #4b5563;
  --self: #111418;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171b;
    --fg: #dfe3e8;
    --muted: #98a1ad;
    --rule: #2a2f36;
    --accent: #8fb4e2;
    --chip-bg: #21262d;
    --chip-fg: #a8b2bf;
    --self: #f2f5f8;
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    "Hiragino Kaku Gothic ProN", "Noto Sans JP", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  font-feature-settings: "palt" 1;
}

.page {
  max-width: 48rem;
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
a:hover { border-bottom-color: currentColor; }

/* ---------- masthead ---------- */

.masthead { margin-bottom: 2.5rem; }

.masthead h1 {
  margin: 0;
  font-size: 1.9rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.masthead-sub {
  margin: 0.15rem 0 0;
  color: var(--muted);
  font-size: 1rem;
}

/* ---------- sections ---------- */

.section { margin-bottom: 2.5rem; }

.section h2 {
  margin: 0 0 0.9rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--rule);
  font-size: 0.8rem;
  font-weight: 650;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
}

.bio { margin: 0 0 1.1rem; }

.note {
  color: var(--muted);
  font-size: 0.85rem;
}

/* ---------- key/value + lists ---------- */

.linklist, .plain, .timeline, .pubs {
  margin: 0;
  padding: 0;
  list-style: none;
}

.linklist li { margin-bottom: 0.2rem; }

.key {
  display: inline-block;
  min-width: 4.5rem;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.sep { color: var(--muted); margin: 0 0.4rem; }

.plain li {
  padding-left: 1.5rem;
  position: relative;
}
.plain li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--muted);
}

/* ---------- period / detail rows ---------- */

.timeline li {
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: 0 0.75rem;
  padding: 0.3rem 0;
}

.period {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-size: 0.9rem;
  padding-top: 0.12rem;
}

.detail .note {
  display: block;
  font-size: 0.85rem;
}

@media (max-width: 34rem) {
  .timeline li { grid-template-columns: 1fr; gap: 0; }
  .period { font-size: 0.8rem; }
}

/* ---------- publications ---------- */

.pub-year { margin-top: 1.6rem; }

.pub-year h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  color: var(--fg);
}

.pub {
  display: grid;
  grid-template-columns: 5.6rem 1fr;
  gap: 0 0.75rem;
  padding: 0.45rem 0;
  border-top: 1px solid var(--rule);
}

.pub-body { display: block; }

.authors { color: var(--muted); }
.self { color: var(--self); font-weight: 600; }
.title { font-weight: 550; }
.venue { color: var(--muted); font-style: italic; }

/* ---------- badges ---------- */

.badge {
  display: inline-block;
  align-self: start;
  margin-top: 0.28rem;
  padding: 0.05rem 0.4rem;
  border-left: 2px solid transparent;
  border-radius: 0 3px 3px 0;
  background: var(--chip-bg);
  color: var(--chip-fg);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  text-align: center;
  white-space: nowrap;
}

.badge-thesis     { border-left-color: #8b5cf6; }
.badge-journal    { border-left-color: #0f8a6a; }
.badge-conference { border-left-color: #2563eb; }
.badge-workshop   { border-left-color: #d97706; }
.badge-preprint   { border-left-color: #9ca3af; }

@media (max-width: 34rem) {
  .pub { grid-template-columns: 1fr; gap: 0; }
  .badge { margin: 0 0 0.2rem; }
}

/* ---------- reference links ---------- */

.reflinks { display: inline; }

.reflink {
  display: inline-block;
  margin-right: 0.3rem;
  padding: 0 0.32rem;
  border: 1px solid var(--rule);
  border-radius: 3px;
  font-size: 0.76rem;
  line-height: 1.5;
  white-space: nowrap;
}
.reflink:hover {
  border-color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ---------- footer ---------- */

.footer {
  margin-top: 3rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.82rem;
}
.footer p { margin: 0; }