/* zobithecat.github.io — minimal academic-style personal page
   Single column, system fonts, no JS, no external CDN.
   Accent color: deep teal.  Dark mode via prefers-color-scheme. */

:root {
  --fg:        #1a1a1a;
  --fg-muted:  #5a5a5a;
  --bg:        #fafafa;
  --bg-card:   #ffffff;
  --accent:    #0a6e6e;
  --accent-hi: #058686;
  --border:    #e4e4e4;
  --maxw:      720px;
  --r:         6px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg:        #e4e4e4;
    --fg-muted:  #999;
    --bg:        #161616;
    --bg-card:   #1f1f1f;
    --accent:    #5fc7c7;
    --accent-hi: #8be0e0;
    --border:    #2a2a2a;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", "Apple SD Gothic Neo", "Noto Sans CJK KR",
    "Nanum Gothic", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 56px 24px 96px;
}

/* ---------- typography ---------- */

h1, h2, h3 {
  font-weight: 600;
  line-height: 1.25;
  color: var(--fg);
}

h1 {
  font-size: 2.0rem;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

h1 .hangul {
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--fg-muted);
  margin-left: 8px;
}

h2 {
  font-size: 1.25rem;
  margin: 48px 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 1.05rem;
  margin: 24px 0 6px;
}

p {
  margin: 0 0 14px;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 100ms;
}
a:hover { border-bottom-color: var(--accent-hi); color: var(--accent-hi); }

strong { font-weight: 600; }

.tagline {
  color: var(--fg-muted);
  margin: 0 0 16px;
  font-size: 0.95rem;
}

.muted {
  color: var(--fg-muted);
  font-size: 0.9rem;
}

/* ---------- header / nav ---------- */

header {
  margin-bottom: 8px;
}

nav.links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 0.95rem;
  margin-top: 4px;
}
nav.links a {
  border-bottom: 1px solid transparent;
}

/* ---------- project article ---------- */

article {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 18px 20px;
  margin: 16px 0 22px;
}
article h3 {
  margin: 0 0 8px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}
article .year {
  color: var(--fg-muted);
  font-weight: 400;
  font-size: 0.9rem;
}
article .oneline {
  font-style: italic;
  color: var(--fg-muted);
  margin-bottom: 8px;
}
article .meta {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-top: 12px;
  margin-bottom: 0;
}

/* ---------- research areas ---------- */

.area {
  margin: 16px 0 8px;
}
.area h3 {
  margin-bottom: 4px;
  font-size: 1rem;
}
.area p {
  margin-bottom: 8px;
  font-size: 0.95rem;
}

/* ---------- patents list ---------- */

ol.patents {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: pat;
}
ol.patents li {
  padding: 10px 0;
  border-bottom: 1px dotted var(--border);
  font-size: 0.93rem;
  counter-increment: pat;
}
ol.patents li:last-child { border-bottom: none; }

ol.patents .patno {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85rem;
  color: var(--fg-muted);
}
ol.patents .date {
  color: var(--fg-muted);
  font-size: 0.85rem;
}
ol.patents .assignee {
  color: var(--accent);
  font-size: 0.85rem;
}
ol.patents .ptitle {
  margin-top: 3px;
  color: var(--fg);
  line-height: 1.45;
}

/* ---------- affiliations ---------- */

ul.affil {
  list-style: none;
  padding: 0;
  margin: 0;
}
ul.affil li {
  padding: 4px 0;
  font-size: 0.95rem;
}

/* ---------- CV-style lists (education, career, grants, pubs) ---------- */

ul.cv {
  list-style: none;
  padding: 0;
  margin: 0;
}
ul.cv li {
  padding: 10px 0;
  border-bottom: 1px dotted var(--border);
  font-size: 0.94rem;
  line-height: 1.55;
}
ul.cv li:last-child { border-bottom: none; }
ul.cv strong { color: var(--fg); }
ul.cv em { color: var(--fg-muted); font-style: italic; }

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

footer {
  margin-top: 64px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  text-align: center;
}
footer .muted { font-size: 0.85rem; }

/* ---------- mobile ---------- */

@media (max-width: 520px) {
  main { padding: 32px 18px 64px; }
  h1 { font-size: 1.7rem; }
  h1 .hangul { display: block; margin-left: 0; margin-top: 4px; }
  article { padding: 14px 16px; }
}