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

/* ── VARIABLES ── */
:root {
  --bg: #ffffff;
  --bg-alt: #f8f8f8;
  --text: #111111;
  --text-mid: #4a4a4a;
  --text-light: #888888;
  --accent: #2563eb;
  --accent-light: #eff6ff;
  --border: #e5e5e5;
  --radius: 8px;
  --max-w: 640px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── NAV ── */
nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #ffffff;
  border-bottom: 1px solid var(--border);
}
nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
nav .logo {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}
nav .links { display: flex; gap: 24px; }
nav .links a {
  font-size: 13px;
  color: var(--text-light);
  text-decoration: none;
  transition: color 0.15s;
}
nav .links a:hover { color: var(--text); }
nav .links a.active { color: var(--text); font-weight: 600; }

/* ── HERO ── */
.hero {
  padding: 80px 0 64px;
}
.hero h1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 16px;
}
.hero .role {
  font-size: 16px;
  color: var(--text-mid);
  margin-bottom: 12px;
}
.hero .role strong {
  color: var(--text);
}
.hero .intro {
  color: var(--text-mid);
  font-size: 15px;
  line-height: 1.7;
  max-width: 520px;
}
.hero .social {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}
.hero .social a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-mid);
  text-decoration: none;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: all 0.15s;
}
.hero .social a:hover {
  color: var(--text);
  border-color: var(--text-mid);
}
.hero .social svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

/* ── SECTIONS ── */
section { padding: 48px 0; }
section + section { border-top: 1px solid var(--border); }

.section-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-light);
  margin-bottom: 24px;
}

/* ── FADE-IN ANIMATION ── */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── INTERESTS / TAGS ── */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  font-size: 13px;
  color: var(--text-mid);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 5px 14px;
  border-radius: 999px;
  transition: all 0.15s;
}
.tag:hover {
  color: var(--text);
  border-color: var(--text-mid);
}

/* ── EXPERIENCE / EDUCATION ── */
.entry {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 16px;
  margin-bottom: 28px;
}
.entry:last-child { margin-bottom: 0; }
.entry .date {
  font-size: 13px;
  color: var(--text-light);
  padding-top: 2px;
  white-space: nowrap;
}
.entry .info h3 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 2px;
}
.entry .info .org {
  font-size: 14px;
  color: var(--text-mid);
  margin-bottom: 4px;
}
.entry .info p {
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.6;
}
.entry .info p a {
  color: var(--text);
  text-decoration: none;
}
.entry .info p a:hover {
  text-decoration: underline;
}

/* ── PUBLICATION ── */
.pub {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  transition: border-color 0.15s;
}
.pub:last-child { margin-bottom: 0; }
.pub:hover {
  border-color: var(--text-light);
}
.pub h3 {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
}
.pub h3 a {
  color: var(--text);
  text-decoration: none;
  transition: color 0.15s;
}
.pub h3 a:hover {
  text-decoration: underline;
}
.pub .authors {
  font-size: 14px;
  color: var(--text-mid);
  margin-bottom: 8px;
}
.pub .authors strong { color: var(--text); }
.pub .venue {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}
.pub .badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-light);
  padding: 2px 10px;
  border-radius: 999px;
  margin-left: 4px;
}

/* ── CONTACT ── */
.contact-intro {
  color: var(--text-mid);
  margin-bottom: 16px;
}
.contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-mid);
}
.contact-item svg {
  width: 16px;
  height: 16px;
  fill: var(--text-light);
  flex-shrink: 0;
}
.contact-item a {
  color: var(--text);
  text-decoration: none;
}
.contact-item a:hover { text-decoration: underline; }

/* ── FOOTER ── */
footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}
footer p {
  font-size: 13px;
  color: var(--text-light);
}

/* ── RESPONSIVE ── */
@media (max-width: 600px) {
  .hero { padding: 56px 0 48px; }
  .hero h1 { font-size: 28px; }
  .entry {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  nav .links { gap: 16px; }
}