/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0d1117;
  --bg2:       #161b22;
  --bg3:       #21262d;
  --border:    #30363d;
  --accent:    #58a6ff;
  --accent2:   #3fb950;
  --muted:     #8b949e;
  --text:      #e6edf3;
  --text-soft: #c9d1d9;
  --wip:       #d29922;
  --font:      'Inter', system-ui, sans-serif;
  --mono:      'JetBrains Mono', monospace;
  --radius:    8px;
  --max-w:     860px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text-soft);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

h1, h2, h3, h4 { color: var(--text); font-weight: 600; line-height: 1.3; }
h1 { font-size: 2rem; }
h2 { font-size: 1.35rem; margin: 2rem 0 0.75rem; }
h3 { font-size: 1.1rem; margin: 1.25rem 0 0.5rem; }

hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }

ul, ol { padding-left: 1.4em; }
li { margin-bottom: 0.25rem; }

/* ── Nav ── */
.topnav {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: 52px;
}

.nav-brand {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
  letter-spacing: 1px;
  flex-shrink: 0;
}
.nav-brand:hover { text-decoration: none; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  flex-wrap: wrap;
  flex: 1;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 0.3rem 0.55rem;
  border-radius: var(--radius);
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--text); background: var(--bg3); text-decoration: none; }
.nav-links a.active { color: var(--accent); }

.nav-cv {
  margin-left: auto;
  background: var(--accent) !important;
  color: var(--bg) !important;
  padding: 0.25rem 0.7rem !important;
  border-radius: var(--radius) !important;
  font-weight: 600 !important;
}
.nav-cv:hover { opacity: 0.85; }

.nav-toggle { display: none; background: none; border: none; color: var(--muted); font-size: 1.2rem; cursor: pointer; }

/* ── Page content ── */
.page-content {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
  flex: 1;
  width: 100%;
}

/* ── Hero (home page) ── */
.hero {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 2.5rem 0 2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

.hero-avatar {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  border: 2px solid var(--border);
  flex-shrink: 0;
  object-fit: cover;
}

.hero-name {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 0.2rem;
}

.hero-title {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.hero-location {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.9rem;
}

.tag {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text-soft);
  font-size: 0.75rem;
  padding: 0.2rem 0.55rem;
  border-radius: 20px;
  font-family: var(--mono);
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.hero-links a {
  color: var(--muted);
  font-size: 0.82rem;
  border: 1px solid var(--border);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius);
  transition: color 0.15s, border-color 0.15s;
}
.hero-links a:hover { color: var(--accent); border-color: var(--accent); text-decoration: none; }

/* ── News / updates strip ── */
.news-strip {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent2);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 2rem;
}

.news-strip h2 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent2);
  margin: 0 0 0.75rem;
}

.news-item {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  padding: 0.3rem 0;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
}
.news-item:first-of-type { border-top: none; }

.news-date {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.75rem;
  flex-shrink: 0;
  min-width: 70px;
}

/* ── Cards ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: border-color 0.15s;
}
.card:hover { border-color: var(--accent); }

.card-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.card h3 { margin: 0 0 0.4rem; font-size: 0.95rem; }
.card p  { font-size: 0.82rem; color: var(--muted); margin: 0; }

/* ── Publication entries ── */
.pub-entry {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
}

.pub-entry h3 { font-size: 1rem; margin: 0 0 0.35rem; }
.pub-venue { font-size: 0.8rem; color: var(--muted); margin-bottom: 0.5rem; }
.pub-authors { font-size: 0.8rem; color: var(--muted); margin-bottom: 0.6rem; font-style: italic; }
.pub-meta { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin-bottom: 0.6rem; }
.pub-meta .tag { font-size: 0.7rem; }

.badge {
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: 20px;
  font-weight: 600;
  font-family: var(--mono);
}
.badge-accepted  { background: rgba(63,185,80,0.15); color: var(--accent2); border: 1px solid rgba(63,185,80,0.3); }
.badge-published { background: rgba(88,166,255,0.15); color: var(--accent);  border: 1px solid rgba(88,166,255,0.3); }
.badge-wip       { background: rgba(210,153,34,0.15); color: var(--wip);     border: 1px solid rgba(210,153,34,0.3); }

.section-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4rem;
  margin: 2rem 0 1rem;
}

/* ── Experience entries ── */
.exp-entry {
  border-left: 2px solid var(--border);
  padding-left: 1.25rem;
  margin-bottom: 2rem;
  position: relative;
}
.exp-entry::before {
  content: '';
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  position: absolute;
  left: -5px; top: 6px;
}

.exp-title { font-size: 1rem; font-weight: 600; color: var(--text); margin-bottom: 0.1rem; }
.exp-org   { color: var(--accent); font-size: 0.85rem; }
.exp-meta  { font-size: 0.78rem; color: var(--muted); margin: 0.15rem 0 0.75rem; }

.skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.75rem;
}

.skill-block {
  margin-bottom: 2rem;
}

.edu-table {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-top: 1rem;
  font-size: 0.84rem;
}

.edu-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 4rem;
  gap: 1rem;
  align-items: center;
  padding: 0.45rem 0.7rem;
  border-top: 1px solid var(--border);
}

.edu-row:first-child {
  border-top: 0;
}

.edu-row:nth-child(even) {
  background: var(--bg2);
}

.edu-head {
  background: var(--bg3);
  color: var(--text);
  font-weight: 600;
}

.edu-row strong {
  color: var(--accent2);
  text-align: right;
  font-family: var(--mono);
  font-size: 0.8rem;
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg2);
  padding: 1.25rem 1.5rem;
  font-size: 0.78rem;
  color: var(--muted);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer-links { display: flex; gap: 1rem; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--accent); text-decoration: none; }

/* ── Tables ── */
table { width: 100%; border-collapse: collapse; font-size: 0.85rem; margin: 1rem 0; }
th { background: var(--bg3); color: var(--text); padding: 0.5rem 0.75rem; text-align: left; border: 1px solid var(--border); }
td { padding: 0.4rem 0.75rem; border: 1px solid var(--border); color: var(--text-soft); }
tr:nth-child(even) td { background: var(--bg2); }

/* ── Misc ── */
blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  margin: 1rem 0;
  color: var(--muted);
  font-style: italic;
}

code {
  background: var(--bg3);
  padding: 0.1em 0.4em;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 0.85em;
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .hero { flex-direction: column; text-align: center; }
  .hero-tags, .hero-links { justify-content: center; }
  .hero-avatar { width: 100px; height: 100px; }
  .nav-links { display: none; flex-direction: column; position: absolute; top: 52px; left: 0; right: 0; background: var(--bg2); border-bottom: 1px solid var(--border); padding: 0.75rem 1.5rem; gap: 0.25rem; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .nav-cv { margin-left: 0 !important; }
  .footer-inner { flex-direction: column; text-align: center; }
  .news-item { flex-direction: column; gap: 0.2rem; }
}