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

:root {
  --bg: #ffffff;
  --surface: #f8fafc;
  --text: #1e293b;
  --muted: #64748b;
  --accent: #3451b2;
  --accent-hover: #2b3f8e;
  --accent-light: #eef1fe;
  --border: #e2e8f0;
  --gold: #e8a317;
  --silver: #8993a4;
  --bronze: #cd7c2a;
  --radius: 10px;
}


html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── Navbar ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}


.nav-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s;
}

.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--accent); }

/* ── Layout ── */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
}

/* ── Hero ── */
.hero {
  text-align: center;
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 0.15rem;
}

.muted { color: var(--muted); }

.links {
  margin-top: 1rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.links a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.15s;
}

.links a:hover { color: var(--accent-hover); }

/* ── Sections ── */
section {
  margin-bottom: 2.5rem;
}

h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}

/* ── Publications ── */
.pub {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.pub:last-child {
  border-bottom: none;
}


.pub-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  text-decoration: none;
  line-height: 1.4;
}

a.pub-title:hover { text-decoration: underline; }

.pub-meta {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

.pub-authors {
  font-size: 0.85rem;
  margin-top: 0.2rem;
  color: var(--text);
}

.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.1rem 0.45rem;
  border-radius: 99px;
  background: var(--accent);
  color: #fff;
  vertical-align: middle;
}

/* ── Tags ── */
.pub-tags {
  margin-bottom: 0.35rem;
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  letter-spacing: 0.01em;
}

.tag-agents {
  background: #dbeafe;
  color: #1e40af;
}

.tag-alignment {
  background: #ede9fe;
  color: #5b21b6;
}

.tag-applied {
  background: #d1fae5;
  color: #065f46;
}

.tag-education {
  background: #fef3c7;
  color: #92400e;
}


.pub-summary {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.4rem;
  line-height: 1.5;
}

/* ── Page Header ── */
.page-header {
  margin-bottom: 2rem;
}

.page-header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ── Section Description ── */
.section-desc {
  font-size: 0.88rem;
  color: var(--muted);
  margin-top: -0.6rem;
  margin-bottom: 1rem;
}

.section-desc a {
  color: var(--accent);
  text-decoration: none;
}

.section-desc a:hover { text-decoration: underline; }

/* ── Bio ── */
.bio {
  font-size: 0.92rem;
  line-height: 1.8;
}

.bio p {
  margin-bottom: 0.8rem;
  color: var(--text);
}

.bio a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.bio a:hover { text-decoration: underline; }

/* ── Awards ── */
.awards {
  list-style: none;
}

.awards li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}

.awards li:last-child { border-bottom: none; }

.award-place {
  display: inline-block;
  width: 2.2rem;
  text-align: center;
  font-weight: 700;
  font-size: 0.8rem;
  padding: 0.15rem 0;
  border-radius: 4px;
  margin-right: 0.6rem;
  color: #fff;
}

.award-place.gold { background: var(--gold); }
.award-place.silver { background: var(--silver); }
.award-place.bronze { background: var(--bronze); }

/* ── Experience ── */
.exp {
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--border);
}

.exp:last-child {
  border-bottom: none;
}

.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.exp-date {
  font-size: 0.82rem;
  color: var(--muted);
  white-space: nowrap;
}

.exp p {
  font-size: 0.88rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

.inline-link {
  color: var(--accent);
  text-decoration: none;
}

.inline-link:hover { text-decoration: underline; }

/* ── Hamburger ── */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
}

.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  margin: 4px 0;
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.hamburger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ── Responsive ── */
@media (max-width: 600px) {
  .hero h1 { font-size: 1.7rem; }
  .container { padding: 2rem 1rem 1.5rem; }
  .exp-header { flex-direction: column; gap: 0.2rem; }

  .hamburger { display: block; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 0.75rem 1.5rem;
    gap: 0.75rem;
  }

  .nav-links.open { display: flex; }

  .navbar { position: relative; }
  .nav-inner { position: relative; }
}