/*
 * 墨 — a lacquer-black page.
 *
 * The ground is the warm black of Chu lacquerware and the ink is paper-white at
 * a few dilutions; hierarchy comes from tone and a single heavier weight, not
 * from colour. The only pigment is the vermilion of the seal. A hairline runs
 * down the fold between the identity column and the text, and the classical
 * note is kept faint: it lives only in the inscription at the foot of the
 * identity column, set in Chu-script glyphs so that it reads like a rubbing.
 *
 * Type: Crimson Pro for text, Ubuntu Mono for the e-mail lines.
 *   medium    the name, section headings (tracked capitals)
 *   regular   everything
 *   semibold  names of things (titles, places)
 *   italic    the descriptor line under a title (venue, role, degree)
 */

/* ---------- Fonts (self-hosted subsets, see tools/subset_fonts.py) ---------- */

@font-face {
  font-family: "Crimson Pro";
  src: url("../fonts/crimson-pro.woff2") format("woff2");
  font-weight: 200 900; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Crimson Pro";
  src: url("../fonts/crimson-pro-italic.woff2") format("woff2");
  font-weight: 200 900; font-style: italic; font-display: swap;
}
@font-face {
  font-family: "Ubuntu Mono";
  src: url("../fonts/ubuntu-mono.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
/* ---------- Tokens ---------- */

:root {
  --ground: #141311;  /* warm black, never pure */
  --ink-1:  #f1ece2;  /* undiluted: the name, titles */
  --ink-2:  #d4cec2;  /* body text */
  --ink-3:  #a09a8e;  /* second voice: dates, venues, roles */
  --ink-4:  #6c675d;  /* marginalia */
  --rule:   #2f2c27;  /* hairlines */
  --verse:  #bcb5a8;  /* the inscription */
  --seal:   #b83a2a;  /* vermilion */
  color-scheme: dark;

  --serif: "Crimson Pro", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --mono:  "Ubuntu Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --side:    14.5rem;
  --gutter:  4rem;
  --measure: 44rem;
  --top:     5.5rem;
}

/* ---------- Ground ---------- */

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

html {
  font-size: 112.5%;
  background: var(--ground);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scrollbar-color: var(--ink-4) var(--ground);
}

body {
  position: relative;
  z-index: 0;
  margin: 0;
  color: var(--ink-2);
  font: 400 1rem/1.64 var(--serif);
  font-kerning: normal;
  font-variant-ligatures: common-ligatures;
  font-variant-numeric: lining-nums proportional-nums;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* A little tooth, and a breath of light from the upper left. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 .07 0 0 0 -.026'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"),
    radial-gradient(ellipse 70% 55% at 18% 0%, rgba(255, 252, 245, .034), transparent 72%);
}

::selection { background: var(--ink-1); color: var(--ground); }

a { color: inherit; }

/* ---------- The page: identity | fold | text ---------- */

.page {
  display: grid;
  grid-template-columns: var(--side) 1px minmax(0, var(--measure));
  grid-template-rows: 1fr auto;
  column-gap: var(--gutter);
  justify-content: center;
  min-height: 100vh;
  padding: 0 1.5rem;
}

.side {
  grid-column: 1;
  grid-row: 1 / span 2;
  align-self: start;
  position: sticky;
  top: 0;
  height: 100vh;
  padding: var(--top) 0 3.4rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-end;
  gap: 3.2rem;
  text-align: right;
}

.axis {
  grid-column: 2;
  grid-row: 1 / span 2;
  background: var(--rule);
}

.main {
  grid-column: 3;
  grid-row: 1;
  padding: var(--top) 0 0;
  min-width: 0;
}

.colophon {
  grid-column: 3;
  grid-row: 2;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .2rem 1.5rem;
  margin-top: 5rem;
  padding: 1.1rem 0 3.4rem;
  border-top: 1px solid var(--rule);
  color: var(--ink-3);
  font-size: .88rem;
}

/* ---------- Identity column ---------- */

.side-top {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.portrait {
  display: block;
  width: 6.6rem;
  height: 6.6rem;
  border-radius: 50%;
  object-fit: cover;
  /* a thin ring, held off the picture */
  outline: 1px solid var(--rule);
  outline-offset: .34rem;
}

.name {
  margin: 1.8rem 0 .7rem;
  font: 500 2.1rem/1.1 var(--serif);
  letter-spacing: 0;
  color: var(--ink-1);
}

.role {
  margin: 0;
  line-height: 1.5;
}
.role a { text-decoration: none; }
.role a:hover { color: var(--ink-1); }

.contact {
  margin: .8rem 0 0;
  color: var(--ink-3);
  font: 400 .8rem/1.7 var(--mono);
}

.links {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  margin-top: 1.2rem;
}
.links a {
  display: block;
  color: var(--ink-3);
  transition: color .25s ease;
}
.links a:hover { color: var(--ink-1); }
.links svg {
  display: block;
  width: 1.2rem;
  height: 1.2rem;
  fill: currentColor;
}

/* ---------- Inscription ---------- */

.inscription { margin: 0; }

/* The verse is drawn from Chu-script glyphs (tools/build_verse_chu.py) and used
   as a mask, so the ink takes its colour from the page. The seal sits under the
   last column, which that script centres at 120/1230 of the width and ends at
   1720/1990 of the height. */
.verse {
  position: relative;
  display: block;
  width: 6.3rem;
}
.verse-glyphs {
  display: block;
  aspect-ratio: 1230 / 1990;
  background: var(--verse);
  -webkit-mask: url("../img/verse-chu.svg") center / contain no-repeat;
  mask: url("../img/verse-chu.svg") center / contain no-repeat;
}
.seal {
  position: absolute;
  left: calc(9.76% - .78rem);
  top: 88.6%;
  display: block;
  width: 1.56rem;
  height: 1.56rem;
  color: var(--seal);
}

/* ---------- Text column ---------- */

.main h2 {
  margin: 3.5rem 0 1.15rem;
  padding-bottom: .6rem;
  border-bottom: 1px solid var(--rule);
  font: 500 .84rem/1.2 var(--serif);
  text-transform: uppercase;
  letter-spacing: .2em;
  color: var(--ink-1);
}
.main > h2:first-child { margin-top: 0; }

.main p { margin: 0 0 1rem; text-wrap: pretty; }

.main a {
  color: var(--ink-1);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: .22em;
  text-decoration-color: var(--ink-4);
  transition: text-decoration-color .25s ease;
}
.main a:hover { text-decoration-color: var(--ink-1); }

.main strong { font-weight: 600; color: var(--ink-1); }

.main ul, .main ol {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
}
.main p + ul, .main p + ol { margin-top: -.35rem; }
.main li {
  position: relative;
  padding-left: 1.35em;
}
.main li + li { margin-top: .12rem; }
/* a short dash with the weight of the text beside it, not a hairline */
.main li::before {
  content: "";
  position: absolute;
  left: .05em;
  top: .78em;
  width: .62em;
  height: 2px;
  border-radius: 1px;
  background: var(--ink-3);
}

.note { color: var(--ink-3); font-style: italic; }

/* ---------- Publications ---------- */

.pub { margin-bottom: 1.5rem; }
.pub-title {
  color: var(--ink-1);
  font-weight: 600;
  line-height: 1.42;
  text-wrap: balance;
}
.pub-authors { margin-top: .15rem; }
.pub-venue { color: var(--ink-3); font-style: italic; }
.pub-links {
  display: flex;
  align-items: center;
  gap: 1.05rem;
  margin-top: .6rem;
}
.main .pub-links a {
  display: block;
  color: var(--ink-3);
  text-decoration: none;
  transition: color .25s ease;
}
.main .pub-links a:hover { color: var(--ink-1); }
.pub-links svg {
  display: block;
  height: 1.12rem;
  width: auto;
  fill: currentColor;
}

/* ---------- Experience & education ---------- */

.exp { margin-bottom: 1.35rem; }
.exp-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0 1.2rem;
}
.exp-org { color: var(--ink-1); font-weight: 600; }
.exp-date {
  margin-left: auto;
  color: var(--ink-3);
  white-space: nowrap;
}
.exp-role { color: var(--ink-3); font-style: italic; }
.exp-desc { margin-top: .25rem; }

.edu { display: flex; align-items: flex-start; gap: 1.05rem; }
.edu-logo {
  flex: none;
  width: 2.7rem;
  height: auto;
  margin-top: .22rem;
}
.edu-body { flex: 1; min-width: 0; }

/* The marks keep their colours and sit directly on the ground. The HUST emblem
   is line art in a deep blue, so it is lifted a little to stay legible; the hues
   are unchanged. */
.edu-logo[src*="hust"] { filter: brightness(1.45) saturate(1.05); }

/* ---------- Arrival ---------- */

@media (prefers-reduced-motion: no-preference) {
  .side-top, .main, .inscription, .colophon {
    animation: settle 1.1s cubic-bezier(.2, .7, .2, 1) both;
  }
  .main { animation-delay: .12s; }
  .inscription { animation-delay: .5s; animation-duration: 1.6s; }
  .colophon { animation-delay: .3s; }
  @keyframes settle {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: none; }
  }
}

/* ---------- Short windows: let the identity column scroll with the page ---------- */

@media (max-height: 740px) {
  .side { position: static; height: auto; min-height: 100vh; }
}

/* ---------- Narrower desks ---------- */

@media (max-width: 1180px) {
  :root { --side: 13rem; --gutter: 3rem; }
}
@media (max-width: 1000px) {
  :root { --side: 12rem; --gutter: 2.4rem; }
  .name { font-size: 1.9rem; }
}

/* ---------- One column ---------- */

@media (max-width: 860px) {
  :root { --top: 3.2rem; }

  .page {
    display: flex;
    flex-direction: column;
    max-width: 38rem;
    margin: 0 auto;
    padding: 0 1.45rem;
  }
  .side { display: contents; }
  .axis { display: none; }

  .side-top {
    order: 1;
    align-items: flex-start;
    padding-top: var(--top);
    text-align: left;
  }
  .portrait { width: 5.4rem; height: 5.4rem; }
  .name { margin-top: 1.5rem; }
  .links { justify-content: flex-start; }

  .main { order: 2; padding-top: 3rem; }
  .main h2 { margin-top: 3rem; }

  .inscription {
    order: 3;
    align-self: center;
    margin: 4.2rem 0 .4rem;
  }

  .colophon { order: 4; margin-top: 3.4rem; }
}