/* ===========================================================================
   hanyuc.com
   Tokens -> base -> layout -> components. No framework.
   =========================================================================== */

/* --- fonts --------------------------------------------------------------- */
@font-face {
  font-family: 'Newsreader';
  src: url('fonts/newsreader-roman.woff2?v=2a589d80') format('woff2-variations');
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Newsreader';
  src: url('fonts/newsreader-italic.woff2?v=2a589d80') format('woff2-variations');
  font-weight: 400 700;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: 'Plex Mono';
  src: url('fonts/plex-mono-400.woff2?v=2a589d80') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Plex Mono';
  src: url('fonts/plex-mono-500.woff2?v=2a589d80') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Noto Serif SC';
  src: url('fonts/noto-serif-sc-subset.woff2?v=2a589d80') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  unicode-range: U+5b87, U+6db5, U+9648; /* subset to exactly these glyphs */
}

/* --- tokens -------------------------------------------------------------- */
:root {
  --serif: 'Newsreader', 'Noto Serif SC', Georgia, 'Times New Roman', serif;
  --mono: 'Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --paper:      #f4f6f5;
  --paper-sunk: #eceff0;
  --ink:        #333c38;
  --ink-soft:   #5f6d68;
  --ink-faint:  #8d9a95;
  --accent:     #4b6e5d;
  --accent-hi:  #344f42;
  --award:      #b4574a;
  --rule:       #d5ded8;

  --measure: 66ch;
  --rail: 15rem;
  --gap: 3.25rem;

  --step--1: 0.8125rem;
  --step-0:  1.0625rem;
  --step-1:  1.1875rem;
  --step-2:  1.5rem;

  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.875rem;
  --sp-4: 1.375rem;
  --sp-5: 2.25rem;
  --sp-6: 3.5rem;

  color-scheme: light;
}

/* Deliberately light-only.
 *
 * Dark mode is blocked on the thumbnails, not on the palette. Three of the six
 * have white baked into the image, so on a dark ground they render as bright
 * rectangles; dimming them (brightness or opacity) only makes that less
 * obtrusive, never absent. The other three are transparent but carry black
 * captions, which disappear without a light plate behind them.
 *
 * Re-exporting those thumbnails - transparent backgrounds, and caption text
 * light enough to survive on a dark ground - is what unblocks it. The palette
 * below is ready for that; `color-scheme: light` keeps browsers from
 * auto-darkening in the meantime.
 */

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: var(--step-0);
  font-weight: 430;
  line-height: 1.6;
  font-synthesis-weight: none;
}

h1, h2, h3 { font-weight: 550; line-height: 1.3; margin: 0; text-wrap: balance; }
p { margin: 0; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent-hi); }

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

.skip-link {
  position: absolute; left: -9999px;
  background: var(--paper); padding: var(--sp-2) var(--sp-3); z-index: 10;
}
.skip-link:focus { left: var(--sp-3); top: var(--sp-3); }

.icon { width: 1em; height: 1em; flex: none; }
.icon-sm { width: 0.875em; height: 0.875em; }

/* --- layout -------------------------------------------------------------- */
.layout {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, var(--measure));
  gap: var(--gap);
  justify-content: center;
  padding: var(--sp-6) var(--sp-4);
}

.rail {
  grid-column: 1;
  position: sticky;
  top: var(--sp-6);
  align-self: start;
}

.main { grid-column: 2; min-width: 0; }

/* --- rail ---------------------------------------------------------------- */
.portrait {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 3px;
  filter: saturate(0.92);
}

.identity { margin-top: var(--sp-4); }

.identity-latin {
  display: block;
  font-size: var(--step-2);
  font-weight: 550;
  letter-spacing: -0.012em;
}

.identity-cjk {
  display: block;
  margin-top: 0.15em;
  margin-right: -0.42em; /* optical trim for the trailing letter-space */
  font-family: 'Noto Serif SC', var(--serif);
  font-size: var(--step-1);
  font-weight: 400;
  letter-spacing: 0.42em;
  color: var(--ink-soft);
}

.rail-links, .rail-nav { display: flex; flex-direction: column; }

.rail-links {
  margin-top: var(--sp-4);
  gap: 0.35rem;
  font-size: var(--step--1);
  font-family: var(--mono);
}

.rail-links a {
  display: flex;
  align-items: center;
  gap: 0.6em;
  text-decoration: none;
  color: var(--ink-soft);
  width: fit-content;
}
.rail-links a:hover { color: var(--accent); }
.rail-links svg { color: var(--ink-faint); }
.rail-links a:hover svg { color: var(--accent); }

.rail-nav {
  margin-top: var(--sp-4);
  padding-top: var(--sp-3);
  border-top: 1px solid var(--rule);
  gap: 0.3rem;
  font-family: var(--mono);
  font-size: var(--step--1);
}
.rail-nav a { color: var(--ink-faint); text-decoration: none; width: fit-content; }
.rail-nav a:hover { color: var(--accent); }

/* --- main ---------------------------------------------------------------- */
.bio { margin-bottom: var(--sp-6); }

section { margin-bottom: var(--sp-6); }

h2 {
  font-family: var(--mono);
  font-size: var(--step--1);
  font-weight: 500;
  text-transform: lowercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  padding-bottom: var(--sp-2);
  border-bottom: 1px solid var(--rule);
  margin-bottom: var(--sp-4);
}

/* --- publications -------------------------------------------------------- */
.pub {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  gap: var(--sp-4);
  padding: var(--sp-4) 0;
  border-bottom: 1px solid var(--rule);
}
.pub:last-child { border-bottom: 0; }

/* No box: each figure keeps its own aspect ratio (they run 1.00-1.27, so any
   fixed ratio letterboxes some of them). `multiply` merges the white that is
   baked into half the thumbnails into the paper, so all six read alike. */
.pub-figure {
  display: block;
  overflow: hidden;
  border-radius: 2px;
}
.pub-figure img {
  width: 100%;
  height: auto;
  display: block;
  mix-blend-mode: multiply;
  transition: transform 0.35s cubic-bezier(0.2, 0, 0, 1);
}
.pub:hover .pub-figure img { transform: scale(1.035); }

.pub-title {
  font-size: 1.125rem;
  font-weight: 520;
  letter-spacing: -0.004em;
  /* `balance` evens the line lengths, which splits noun phrases
     ("Improved Visual / Disambiguation"). `pretty` keeps them intact
     while still avoiding one-word last lines. */
  text-wrap: pretty;
  /* Headings take a tighter measure than the body text under them;
     in ch so it tracks the font size rather than a magic pixel value. */
  max-width: 42ch;
}
.pub-title a { color: var(--ink); text-decoration: none; }
.pub:hover .pub-title a { color: var(--accent); }

.pub-authors { margin-top: 0.2rem; color: var(--ink-soft); }
.pub-authors a { color: var(--ink-soft); text-decoration: none; }
.pub-authors a:hover { color: var(--accent); text-decoration: underline; }
.pub-authors b { color: var(--ink); font-weight: 500; }

.pub-venue {
  margin-top: 0.1rem;
  font-family: var(--mono);
  font-size: var(--step--1);
  color: var(--ink-faint);
}
.venue-year::before { content: '\00b7\00a0'; }
.award { color: var(--award); }
.award::before { content: '\00b7\00a0'; color: var(--ink-faint); }

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: var(--sp-3);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.2em 0.6em;
  border: 1px solid var(--rule);
  border-radius: 3px;
  font-family: var(--mono);
  font-size: var(--step--1);
  line-height: 1.5;
  color: var(--ink-soft);
  text-decoration: none;
  background: none;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.chip:hover { color: var(--accent); border-color: var(--accent); }

.bibtex { position: relative; margin-top: var(--sp-3); }
.bibtex pre {
  margin: 0;
  padding: var(--sp-3);
  background: var(--paper-sunk);
  border-radius: 3px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: var(--step--1);
  line-height: 1.55;
  color: var(--ink-soft);
}
.bibtex-copy {
  position: absolute;
  top: var(--sp-2); right: var(--sp-2);
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: var(--paper);
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: var(--step--1);
  padding: 0.1em 0.5em;
  cursor: pointer;
}
.bibtex-copy:hover { color: var(--accent); border-color: var(--accent); }

/* --- teaching ------------------------------------------------------------ */
.teaching { list-style: none; margin: 0; padding: 0; }
.teaching li { margin-bottom: var(--sp-3); }
.course-code {
  font-family: var(--mono);
  font-size: var(--step--1);
  color: var(--ink-faint);
}
.course-code::before { content: '('; }
.course-code::after { content: ')'; }
.course-role {
  display: block;
  font-family: var(--mono);
  font-size: var(--step--1);
  color: var(--ink-faint);
}

/* --- listening ----------------------------------------------------------- */
.music summary {
  display: flex;
  align-items: center;
  gap: 0.5em;
  width: fit-content;
  cursor: pointer;
  list-style: none;
  font-family: var(--mono);
  font-size: var(--step--1);
  color: var(--ink-soft);
}
.music summary::-webkit-details-marker { display: none; }
.music summary:hover { color: var(--accent); }
.chevron { transition: transform 0.25s ease; }
.music[open] .chevron { transform: rotate(90deg); }

.tracks {
  list-style: none;
  margin: var(--sp-4) 0 0;
  padding: 0;
  max-width: 30rem;
}

.track {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  width: 100%;
  padding: 0.4rem 0.5rem;
  border: 0;
  border-radius: 3px;
  background: none;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.15s;
}
.track:hover { background: var(--paper-sunk); }
.track[aria-current] { background: var(--paper-sunk); }

.track-art { border-radius: 2px; flex: none; }

.track-text { display: flex; flex-direction: column; min-width: 0; flex: 1; }

.track-title {
  font-size: var(--step-0);
  line-height: 1.35;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.track[aria-current] .track-title { color: var(--accent); }

.track-artist {
  font-family: var(--mono);
  font-size: var(--step--1);
  color: var(--ink-faint);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.track-length {
  font-family: var(--mono);
  font-size: var(--step--1);
  color: var(--ink-faint);
  flex: none;
  min-width: 2.6em;
  text-align: right;
}


.player { margin-top: var(--sp-4); max-width: 30rem; }
.player iframe { border-radius: 12px; display: block; }
.player-fallback {
  font-family: var(--mono);
  font-size: var(--step--1);
  color: var(--ink-faint);
}

/* --- footer -------------------------------------------------------------- */
.footer {
  margin-top: var(--sp-6);
  padding-top: var(--sp-3);
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: var(--step--1);
  color: var(--ink-faint);
}
.footer a { color: var(--ink-faint); }
.footer a:hover { color: var(--accent); }

/* --- responsive ---------------------------------------------------------- */
@media (max-width: 62rem) {
  .layout {
    grid-template-columns: minmax(0, 1fr);
    justify-content: start;
    max-width: 40rem;
    margin-inline: auto;
    gap: var(--sp-5);
    padding-top: var(--sp-5);
  }
  .rail, .main { grid-column: 1; }

  .rail {
    position: static;
    display: grid;
    grid-template-columns: 6.5rem minmax(0, 1fr);
    column-gap: var(--sp-4);
    align-items: start;
  }
  .portrait { grid-row: 1 / span 2; }
  .identity { margin-top: 0; }
  .rail-links {
    grid-column: 2;
    flex-direction: row;
    flex-wrap: wrap;
    column-gap: var(--sp-3);
    margin-top: var(--sp-3);
  }
  .rail-nav { display: none; }
}

@media (max-width: 34rem) {
  .pub { grid-template-columns: minmax(0, 1fr); gap: var(--sp-3); }
  .pub-figure { max-width: 14rem; }
  .rail { grid-template-columns: 5rem minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}