/* ==========================================================================
   Richard F. M. Lim — single-page site
   Palette seeded from the old "mint" theme.
   ========================================================================== */

/* Chinese characters render in KaiTi; Latin text is unaffected because the
   unicode-range limits this family to CJK blocks. src is local-only — no webfont
   is downloaded, so this degrades to the normal fallback where KaiTi is absent. */
@font-face {
  font-family: "KaiTi CJK";
  src: local("Kaiti SC"), local("KaitiSC"), local("STKaitiSC-Regular"),
       local("Kaiti TC"), local("STKaitiTC-Regular"), local("STKaiti"),
       local("Kaiti"), local("KaiTi"), local("KaiTi_GB2312"),
       local("BiauKai"), local("DFKai-SB"), local("AR PL UKai CN"),
       local("\6977\4F53");
  unicode-range: U+2E80-2EFF, U+3000-303F, U+3040-30FF, U+3200-33FF,
                 U+3400-4DBF, U+4E00-9FFF, U+F900-FAFF, U+FE30-FE4F,
                 U+FF00-FFEF, U+20000-2A6DF, U+2A700-2EBEF;
  font-display: swap;
}

:root {
  --bg: #f3f6f6;
  --surface: #ffffff;
  --text: #40514e;
  --text-muted: #5c6d6a;
  --accent: #11999e;
  --accent-hover: #0d7377;
  --border: #d0d7d6;
  --radius: 4px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1b2422;
    --surface: #222d2b;
    --text: #dbe3e1;
    --text-muted: #a3b2af;
    --accent: #30e3ca;
    --accent-hover: #6cf0dd;
    --border: #3a4745;
  }
}

:root[data-theme="dark"] {
  --bg: #1b2422;
  --surface: #222d2b;
  --text: #dbe3e1;
  --text-muted: #a3b2af;
  --accent: #30e3ca;
  --accent-hover: #6cf0dd;
  --border: #3a4745;
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "KaiTi CJK", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  text-align: justify;
  hyphens: auto;
  /* Don't hyphenate short words or acronyms (SZTAKI must not become SZ-TAKI):
     require an 8-character word, 4 characters before the break, 3 after. */
  hyphenate-limit-chars: 8 4 3;
}

/* Headings and UI chrome stay flush left; only running prose is justified. */
h1, h2, h3,
.links,
.news__date,
.proj__meta,
.proj__people {
  text-align: left;
  hyphens: manual;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover, a:focus { color: var(--accent-hover); text-decoration: underline; }

img { max-width: 100%; height: auto; }

/* --------------------------------------------------------------- layout --- */

.page {
  max-width: 46rem;
  margin: 0 auto;
  padding: 3rem 1rem 1rem;
}

.section { margin-top: 3rem; }

h1, h2, h3 { line-height: 1.25; }

h1 {
  margin: 0 0 0.5rem;
  font-size: 1.9rem;
  letter-spacing: -0.02em;
}

h2 {
  margin: 0 0 1.25rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

/* ---------------------------------------------------------------- intro --- */

.intro {
  display: flex;
  flex-wrap: wrap;
  flex-direction: row-reverse;
  justify-content: flex-end;
  gap: 1.75rem;
  align-items: flex-start;
}

.intro__photo {
  flex: 0 0 auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border);
}

.intro__text { flex: 1 1 18rem; min-width: 0; }

.intro__bio, .news__text, .proj__body { overflow-wrap: break-word; }

.intro__name-sep {
  margin: 0 0.45rem;
  font-weight: 400;
}

/* KaiTi has no bold face, so synthetic bold would smear the strokes; regular
   weight is deliberate. Color matches the English name. */
.intro__name-zh { font-weight: 400; }

.intro__bio { margin: 0 0 0.75rem; }

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

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 0;
}

.links__item {
  display: inline-block;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  font-size: 0.875rem;
  line-height: 1.4;
}

.links__item:hover, .links__item:focus {
  border-color: var(--accent);
  text-decoration: none;
}

.links--pub { margin-top: 0.75rem; }

/* ----------------------------------------------------------------- news --- */

.news { margin: 0; padding: 0; list-style: none; }

.news__item {
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.75rem;
  padding: 0.4rem 0;
}

.news__date {
  flex: 0 0 5rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
  padding-top: 0.15rem;
}

.news__text { flex: 1 1 16rem; min-width: 0; }

/* --------------------------------------------------------- projects ------ */

.proj {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--border);
}

.proj:first-of-type { border-top: 0; padding-top: 0; }

.proj__figure { flex: 0 0 11rem; }

.proj__figure img {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.proj__body { flex: 1 1 18rem; min-width: 0; }

.proj__title { margin: 0 0 0.3rem; font-size: 1.05rem; }

.proj__meta,
.proj__people {
  margin: 0 0 0.3rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.proj__role { font-weight: 600; }

.proj__description { margin-top: 0.6rem; }

.proj__description p { margin: 0 0 0.6rem; }

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

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

.site-footer {
  max-width: 46rem;
  margin: 3rem auto 0;
  padding: 1rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.site-footer p { margin: 0; }

/* ----------------------------------------------------------- responsive --- */

@media (max-width: 34rem) {
  .page { padding-top: 2rem; }

  .intro {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
  }

  .intro__photo { width: 128px; height: 128px; }

  .intro__text { flex: 1 1 100%; }

  .news__item { gap: 0.15rem 0; }

  .news__date { flex: 1 1 100%; }

  .news__text { flex: 1 1 100%; }

  .proj__figure { flex: 1 1 100%; }

  .proj__body { flex: 1 1 100%; }
}