/* ===== VARIABLES ===== */
:root {
  --white: #ffffff;
  --border: #dde4ef;
  --tag-bg: #e8edf7;
  --accent: #2c5282;
  --accent-dark: #1a3a6b;
  --body: #3a4a6b;
  --heading: #1a2744;
  --muted: #8898b8;
  --max-width: 680px;
  --font-heading: 'Archivo', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Public Sans', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  background: var(--white);
  color: var(--body);
  line-height: 1.7;
  font-size: 0.9rem;
}
a { color: var(--accent); }

/* ===== NAV ===== */
nav {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 0.85rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
nav .logo {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 800;
  color: var(--heading);
  letter-spacing: -0.04em;
  text-decoration: none;
}
nav .links { display: flex; gap: 1.75rem; }
nav .links a {
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
  padding-bottom: 2px;
}
nav .links a:hover { color: var(--accent); }
nav .links a.active {
  color: var(--accent);
  border-bottom: 1.5px solid var(--accent);
}

/* ===== LAYOUT ===== */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== HERO ===== */
.hero {
  padding: 2.75rem 0 2rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}
.hero-avatar {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.hero-name {
  font-family: var(--font-heading);
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--heading);
  letter-spacing: -0.06em;
  line-height: 1;
  margin-bottom: 0.3rem;
}
.hero-role {
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 0.85rem;
}
.hero-bio {
  font-size: 0.875rem;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 0.85rem;
}
.hero-bio a { text-decoration: none; }
.hero-bio a:hover { text-decoration: underline; }

/* ===== TAGS ===== */
.tags { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.tag {
  background: var(--tag-bg);
  color: var(--accent);
  padding: 0.2rem 0.65rem;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 500;
}

/* ===== SECTIONS ===== */
.section {
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
}
.section:last-child { border-bottom: none; }
.section-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 1.25rem;
}

/* ===== UPDATES ===== */
.update-row {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 0.6rem;
  align-items: baseline;
}
.update-date {
  font-size: 0.75rem;
  color: var(--muted);
  white-space: nowrap;
  min-width: 4.5rem;
}
.update-text { font-size: 0.85rem; color: var(--body); line-height: 1.55; }
.update-text strong { color: var(--heading); font-weight: 600; }

/* ===== PAPERS ===== */
.paper {
  padding-left: 0.85rem;
  border-left: 2px solid var(--border);
  margin-bottom: 1.5rem;
}
.paper:last-child { margin-bottom: 0; }
.paper-title {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--heading);
  margin-bottom: 0.2rem;
  line-height: 1.4;
}
.paper-meta { font-size: 0.78rem; color: var(--muted); }
.paper-desc {
  font-size: 0.85rem;
  color: var(--body);
  line-height: 1.65;
  margin-top: 0.5rem;
}
.badge {
  display: inline-block;
  background: var(--tag-bg);
  color: var(--accent);
  font-size: 0.65rem;
  font-weight: 600;
  padding: 0.1rem 0.45rem;
  border-radius: 3px;
  margin-left: 0.4rem;
  vertical-align: middle;
  letter-spacing: 0.02em;
}

/* ===== CONFERENCE ROWS ===== */
.conf-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.55rem;
  gap: 1rem;
}
.conf-name { font-family: var(--font-heading); font-size: 0.85rem; color: var(--heading); font-weight: 700; }
.conf-meta { font-size: 0.75rem; color: var(--muted); white-space: nowrap; }

/* ===== PAGE TITLE (inner pages) ===== */
.page-title {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--heading);
  letter-spacing: -0.05em;
  padding: 2.5rem 0 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
}

/* ===== CV SPECIFIC ===== */
.cv-section { padding: 1.75rem 0; border-bottom: 1px solid var(--border); }
.cv-section:last-child { border-bottom: none; }
.cv-entry { margin-bottom: 1rem; }
.cv-entry:last-child { margin-bottom: 0; }
.cv-entry-title { font-family: var(--font-heading); font-size: 0.88rem; font-weight: 700; color: var(--heading); }
.cv-entry-sub { font-size: 0.82rem; color: var(--body); }
.cv-entry-meta { font-size: 0.75rem; color: var(--muted); }
.cv-list { list-style: none; }
.cv-list li {
  font-size: 0.85rem;
  color: var(--body);
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.cv-list li:last-child { border-bottom: none; }
.cv-list li span { color: var(--muted); font-size: 0.78rem; white-space: nowrap; }

.btn-download {
  display: inline-block;
  background: var(--accent);
  color: var(--white);
  text-decoration: none;
  padding: 0.55rem 1.1rem;
  border-radius: 5px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 2rem;
  transition: background 0.15s;
}
.btn-download:hover { background: var(--accent-dark); }

/* ===== CONTACT SPECIFIC ===== */
.contact-item {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  margin-bottom: 0.75rem;
}
.contact-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  min-width: 5rem;
}
.contact-value { font-size: 0.875rem; color: var(--body); }
.contact-value a { color: var(--accent); text-decoration: none; }
.contact-value a:hover { text-decoration: underline; }

/* ===== FOOTER ===== */
footer {
  border-top: 1px solid var(--border);
  padding: 0;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-copy { font-size: 0.75rem; color: var(--muted); }
.footer-email { font-size: 0.75rem; color: var(--accent); text-decoration: none; }
.footer-email:hover { text-decoration: underline; }

/* ===== RESPONSIVE ===== */
@media (max-width: 520px) {
  nav { flex-direction: column; gap: 0.75rem; align-items: flex-start; }
  .hero { flex-direction: column; }
  .conf-row { flex-direction: column; gap: 0.1rem; }
  .conf-meta { white-space: normal; }
  .footer-inner { flex-direction: column; gap: 0.5rem; align-items: flex-start; }
}