/* =============================================================================
   PLAIN — a deliberately minimal, black-on-white, "old-school academic
   homepage" stylesheet. Fully self-contained: no CSS variables shared with
   the kspace design system, no dark mode, no accent colours beyond black,
   white and grey. Used only by /minimal/.
   ============================================================================= */

* { box-sizing: border-box; }

/* Bilingual atom: both languages are rendered, exactly one is shown.
   Mirrors the rule in _sass/kspace/_base.scss but duplicated here so this
   page never has to load the full (dark-themed) site stylesheet. */
html[data-lang="en"] .i18n[lang="zh"],
html[data-lang="zh"] .i18n[lang="en"] { display: none !important; }

html {
  background: #fff;
  color-scheme: light;
}

body.plain {
  margin: 0;
  background: #fff;
  color: #111;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.plain__wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

/* ---- top bar --------------------------------------------------------- */
.plain__bar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .75rem;
  padding-bottom: .9rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid #111;
  font-size: .85rem;
}

.plain__bar a {
  color: #111;
  text-decoration: none;
  border-bottom: 1px solid #111;
}

.plain__bar a:hover { color: #555; border-color: #555; }

.plain__lang button {
  border: 1px solid #111;
  background: #fff;
  color: #111;
  font: inherit;
  font-size: .78rem;
  font-weight: 600;
  padding: .15rem .5rem;
  margin-left: .3rem;
  cursor: pointer;
}

.plain__lang button[aria-pressed="true"] { background: #111; color: #fff; }

/* ---- typography -------------------------------------------------------- */
.plain h1 {
  font-size: 1.9rem;
  font-weight: 700;
  margin: 0 0 .2rem;
  letter-spacing: -.01em;
}

.plain h1 small {
  display: block;
  font-size: 1rem;
  font-weight: 400;
  color: #555;
  margin-top: .15rem;
}

.plain__role {
  font-size: .95rem;
  color: #444;
  margin: .35rem 0 0;
}

.plain__tagline {
  font-size: .85rem;
  color: #777;
  letter-spacing: .01em;
  margin: .15rem 0 0;
}

.plain__links {
  margin: 1.1rem 0 0;
  font-size: .92rem;
  line-height: 1.9;
}

.plain__links a { color: #111; text-decoration: underline; }
.plain__links a:hover { color: #555; }

.plain__links .sep { color: #bbb; padding: 0 .5rem; }

.plain p { margin: 0 0 1rem; }

.plain a { color: #111; text-decoration: underline; text-decoration-color: #999; }
.plain a:hover { color: #000; text-decoration-color: #000; }

.plain strong { color: #000; }

/* ---- section rhythm ----------------------------------------------------- */
.plain section {
  margin-top: 2.4rem;
  padding-top: 1.4rem;
  border-top: 1px solid #111;
}

.plain h2 {
  font-size: 1.05rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin: 0 0 1rem;
}

.plain h3 {
  font-size: .95rem;
  font-weight: 700;
  margin: 1.3rem 0 .5rem;
}

.plain h3:first-child { margin-top: 0; }

/* ---- publication list --------------------------------------------------- */
.plain__pub {
  margin: 0 0 1rem;
  padding-left: 1.6rem;
  position: relative;
}

.plain__pub-index {
  position: absolute;
  left: 0;
  color: #999;
  font-size: .85rem;
}

.plain__pub-title { font-weight: 600; }
.plain__pub-title a { text-decoration: underline; }

.plain__pub-meta {
  display: block;
  font-size: .85rem;
  color: #555;
  margin-top: .15rem;
}

.plain__pub-note {
  display: block;
  font-size: .85rem;
  color: #777;
  margin-top: .15rem;
}

/* ---- plain list (education / experience / awards / etc.) --------------- */
.plain__list {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
}

.plain__list li {
  padding: .5rem 0;
  border-bottom: 1px dotted #ccc;
}

.plain__list li:last-child { border-bottom: 0; }

.plain__list .when {
  display: inline-block;
  min-width: 8.5em;
  color: #777;
  font-size: .85rem;
  vertical-align: top;
}

.plain__list .what { font-weight: 600; }
.plain__list .where { color: #444; }

.plain__list .note {
  display: block;
  font-size: .88rem;
  color: #666;
  margin-top: .15rem;
  padding-left: 8.5em;
}

@media (max-width: 480px) {
  .plain__list .when { display: block; min-width: 0; margin-bottom: .1rem; }
  .plain__list .note { padding-left: 0; }
}

/* ---- footer -------------------------------------------------------------- */
.plain__footer {
  margin-top: 3rem;
  padding-top: 1.2rem;
  border-top: 1px solid #111;
  font-size: .82rem;
  color: #777;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
}

.plain__footer a { color: #111; }