/* One stylesheet for the pages of yeonsu-jung.github.io outside the portfolio: Home,
   Publications and the CV. Same type and colours as /portfolio/, which carries its own copy. */
:root {
  color-scheme: light dark;
  --bg: #f3f4f6;
  --surface: #ffffff;
  --ink: #121820;
  --ink-2: #414b58;
  --ink-3: #636d7a;
  --rule: #d4dae1;
  --rule-strong: #b3bcc7;
  --accent: #0b5fa5;
  --accent-soft: #e1ecf7;
  --screen: #0d1117;

  --f-display: "IBM Plex Sans Condensed", "Arial Narrow", "Roboto Condensed", system-ui, sans-serif;
  --f-body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --fs-h1: clamp(2.7rem, 4.6vw + 1rem, 4.8rem);
  --fs-h2: clamp(1.5rem, 1vw + 1.1rem, 1.9rem);
  --fs-lede: clamp(1.08rem, 0.35vw + 1rem, 1.22rem);
  --fs-body: 1.0325rem;
  --fs-small: 0.925rem;
  --fs-mono: 0.8125rem;
  --fs-micro: 0.74rem;

  --gutter: 24px;
  --maxw: 1240px;
  --bar: 49px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --surface: #151b23;
    --ink: #e7ebf0;
    --ink-2: #b4bdc9;
    --ink-3: #8a95a3;
    --rule: #252d38;
    --rule-strong: #3a4552;
    --accent: #6fb2f2;
    --accent-soft: #13283c;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: var(--bar); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: var(--fs-body);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }
img { max-width: 100%; display: block; }
h1, h2, h3, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
button { font: inherit; color: inherit; }

.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.eyebrow {
  font-family: var(--f-mono);
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.me { color: var(--ink); font-weight: 600; }
.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--bg); padding: 8px 12px; z-index: 30; }
.skip:focus { left: 8px; top: 8px; }

/* ---------- top bar: the three tabs of the site ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}
.topbar .wrap { display: flex; align-items: center; gap: 6px 28px; min-height: var(--bar); }
.topbar .who { font-family: var(--f-display); font-weight: 600; font-size: 1.08rem; color: var(--ink); text-decoration: none; white-space: nowrap; }
.tabs { display: flex; gap: 4px; }
.tabs a {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-2);
  padding: 5px 11px;
  border-radius: 999px;
  white-space: nowrap;
}
.tabs a:hover { color: var(--accent); }
.tabs a[aria-current="page"] { background: var(--ink); color: var(--bg); }

/* ---------- home ---------- */
.hero { padding-block: 58px 54px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 52px; align-items: center; }
.hero h1 {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: var(--fs-h1);
  line-height: 0.96;
  letter-spacing: -0.015em;
  margin: 14px 0 12px;
}
.hero .role { font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--ink-2); margin-bottom: 22px; }
.hero .role a { color: inherit; }
.hero .role a:hover { color: var(--accent); }
.hero .lede { font-size: var(--fs-lede); line-height: 1.55; max-width: 34em; margin-bottom: 14px; }
.hero .how { color: var(--ink-2); max-width: 36em; margin-bottom: 24px; }
.hero .how b { color: var(--ink); font-weight: 600; }
.links { display: flex; flex-wrap: wrap; gap: 8px 10px; }
.links a, .links button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--f-mono);
  font-size: var(--fs-mono);
  color: var(--ink);
  text-decoration: none;
  background: var(--surface);
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  padding: 6px 13px;
  line-height: 1.3;
  cursor: pointer;
}
.links a:hover, .links button:hover { border-color: var(--accent); color: var(--accent); }
.links .primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.links .primary:hover { background: var(--accent); border-color: var(--accent); color: var(--bg); }

/* six of the portfolio's panels, as a way in */
.sheet { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.sheet a {
  position: relative;
  display: block;
  aspect-ratio: 16 / 10;
  border-radius: 7px;
  overflow: hidden;
  background: var(--screen);
  border: 1px solid var(--rule);
  text-decoration: none;
  isolation: isolate;
}
.sheet img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.35s ease; }
.sheet a:hover img { transform: scale(1.045); }
.sheet a:hover, .sheet a:focus-visible { border-color: var(--accent); }
.sheet span {
  position: absolute;
  inset: auto 0 0 0;
  padding: 18px 9px 6px;
  font-family: var(--f-mono);
  font-size: 0.69rem;
  letter-spacing: 0.03em;
  line-height: 1.25;
  color: #fff;
  background: linear-gradient(to top, rgba(6, 9, 13, 0.86), rgba(6, 9, 13, 0));
}
.sheet-note { margin-top: 10px; font-family: var(--f-mono); font-size: var(--fs-micro); color: var(--ink-3); }
@media (prefers-reduced-motion: reduce) { .sheet img { transition: none; } }

section.block { padding-block: 52px; border-top: 1px solid var(--rule); }
.block h2 {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: var(--fs-h2);
  line-height: 1.1;
  margin: 8px 0 22px;
}

.interests { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 24px 26px; }
.interests li { border-top: 2px solid var(--ink); padding-top: 12px; }
.interests li.lead { border-top-color: var(--accent); }
.interests li.lead h3 { color: var(--accent); }
.interests h3 { font-family: var(--f-display); font-weight: 600; font-size: 1.22rem; line-height: 1.18; margin-bottom: 6px; }
.interests p { font-size: var(--fs-small); color: var(--ink-2); }
.interests .see { margin-top: 8px; font-family: var(--f-mono); font-size: var(--fs-micro); }

.two { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: 34px 56px; align-items: start; }
.facts { display: grid; grid-template-columns: 7.2em minmax(0, 1fr); }
.facts dt, .facts dd { padding: 9px 0; border-top: 1px solid var(--rule); font-size: var(--fs-small); }
.facts dt { font-family: var(--f-mono); font-size: var(--fs-micro); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); padding-top: 12px; }
.facts dd { color: var(--ink-2); }
.facts dd b { color: var(--ink); font-weight: 600; }

/* ---------- lists of papers (home and publications) ---------- */
.pubs li { display: grid; grid-template-columns: 4.2em minmax(0, 1fr); gap: 2px 16px; padding: 12px 0; border-top: 1px solid var(--rule); }
.pubs .yr { font-family: var(--f-mono); font-size: var(--fs-mono); color: var(--ink-3); padding-top: 2px; }
.pubs .t { font-weight: 600; color: var(--ink); line-height: 1.35; }
.pubs .t a { color: inherit; text-decoration: none; }
.pubs .t a:hover { color: var(--accent); text-decoration: underline; }
.pubs .a { font-size: var(--fs-small); color: var(--ink-2); }
.pubs .v { font-family: var(--f-mono); font-size: var(--fs-micro); color: var(--ink-3); }
.more { margin-top: 14px; font-family: var(--f-mono); font-size: var(--fs-mono); }
.page-head { padding-block: 46px 26px; }
.page-head h1 { font-family: var(--f-display); font-weight: 600; font-size: clamp(2.2rem, 3vw + 1rem, 3.4rem); line-height: 1; margin: 12px 0 12px; }
.page-head p { color: var(--ink-2); max-width: 44em; }
.pub-group { padding-block: 10px 34px; max-width: 60rem; }
.pub-group h2 { font-family: var(--f-mono); font-size: var(--fs-micro); font-weight: 500; letter-spacing: 0.09em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 6px; }

/* ---------- footer ---------- */
footer.contact { border-top: 2px solid var(--ink); padding-block: 38px 56px; }
.contact-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; }
.contact-row code { font-family: var(--f-mono); font-size: 1rem; color: var(--ink); background: var(--surface); border: 1px solid var(--rule-strong); border-radius: 6px; padding: 6px 12px; user-select: all; }
.copy-status { font-family: var(--f-mono); font-size: var(--fs-micro); color: var(--accent); min-height: 1.2em; }
.fine { font-family: var(--f-mono); font-size: var(--fs-micro); color: var(--ink-3); margin-top: 22px; }

@media (max-width: 1040px) {
  .hero-grid, .two { grid-template-columns: minmax(0, 1fr); gap: 34px; }
  .interests { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .interests li.lead { grid-column: 1 / -1; }
}
@media (max-width: 720px) {
  :root { --gutter: 16px; }
  .hero { padding-block: 34px 36px; }
  section.block { padding-block: 40px; }
  .topbar .wrap { gap: 6px 14px; }
  .tabs a { padding: 5px 8px; }
  .interests { grid-template-columns: minmax(0, 1fr); }
  .pubs li { grid-template-columns: minmax(0, 1fr); }
  .facts { grid-template-columns: minmax(0, 1fr); }
  .facts dt { padding-bottom: 0; }
  .facts dd { border-top: 0; padding-top: 2px; }
}