:root {
  --bg: #f7f5f2;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-solid: #ffffff;
  --text: #1f2933;
  --muted: #637083;
  --accent: #6d4aff;
  --accent-dark: #4f34cc;
  --accent-soft: #eee9ff;
  --border: #e8e3dc;
  --shadow: 0 18px 55px rgba(35, 29, 52, 0.08);
  --radius: 22px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 8% 5%, rgba(109, 74, 255, 0.10), transparent 30rem),
    radial-gradient(circle at 94% 14%, rgba(255, 179, 128, 0.12), transparent 27rem),
    var(--bg);
  line-height: 1.65;
}

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

img { max-width: 100%; }

.top-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(232, 227, 220, 0.8);
  background: rgba(247, 245, 242, 0.84);
  backdrop-filter: blur(14px);
}

.nav-inner {
  max-width: 1180px;
  margin: 0 auto;
  min-height: 72px;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  color: var(--text);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.nav-links { display: flex; align-items: center; gap: 8px; }

.nav-links a {
  padding: 8px 12px;
  border-radius: 999px;
  color: #4b5563;
  font-size: 14px;
  font-weight: 650;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-dark);
  background: var(--accent-soft);
}

.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 54px 28px 72px;
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr);
  gap: 64px;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 112px;
  padding: 24px;
  border: 1px solid rgba(232, 227, 220, 0.9);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.profile-img {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 18px;
  object-fit: cover;
  object-position: center 25%;
  display: block;
  margin-bottom: 20px;
}

.sidebar h2 {
  margin: 0;
  font-size: 24px;
  line-height: 1.15;
  letter-spacing: -0.025em;
}

.sidebar-bio {
  margin: 8px 0 18px;
  color: var(--muted);
  font-size: 14px;
}

.sidebar-meta {
  display: grid;
  gap: 9px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}

.sidebar-meta span { display: flex; gap: 9px; align-items: flex-start; }
.sidebar-meta .icon { width: 18px; flex: 0 0 18px; text-align: center; }

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.button,
.social-links a,
.publication-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-solid);
  color: #434c59;
  font-size: 13px;
  font-weight: 700;
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.social-links a { padding: 7px 10px; }
.button { padding: 10px 15px; }
.button.primary { background: var(--accent); color: white; border-color: var(--accent); }

.button:hover,
.social-links a:hover,
.publication-links a:hover {
  transform: translateY(-1px);
  border-color: #cfc3ff;
  box-shadow: 0 8px 22px rgba(55, 42, 96, 0.10);
}

.content { min-width: 0; max-width: 830px; }

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.content h1 {
  margin: 0 0 20px;
  font-size: clamp(38px, 6vw, 62px);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

.content h2 {
  margin: 48px 0 20px;
  font-size: 27px;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.content h3 {
  margin: 0 0 8px;
  font-size: 20px;
  line-height: 1.35;
  letter-spacing: -0.015em;
}

.content p { margin: 0 0 16px; }

.lead {
  max-width: 760px;
  color: #4f5a69;
  font-size: 19px;
  line-height: 1.7;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 24px 0 4px; }

.tag-list { display: flex; flex-wrap: wrap; gap: 9px; margin: 18px 0 0; }
.tag {
  padding: 7px 11px;
  border-radius: 999px;
  color: var(--accent-dark);
  background: var(--accent-soft);
  font-size: 13px;
  font-weight: 700;
}

.card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }

.card,
.item {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: 0 10px 32px rgba(35, 29, 52, 0.045);
}

.item { margin-bottom: 16px; }
.item p:last-child { margin-bottom: 0; }

.item-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.year {
  flex: 0 0 auto;
  padding: 4px 9px;
  border-radius: 999px;
  color: var(--accent-dark);
  background: var(--accent-soft);
  font-size: 12px;
  font-weight: 800;
}

.meta { color: var(--muted); font-size: 14px; }
.venue { margin-top: 7px !important; color: #3f4a58; font-weight: 650; }

.publication-links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 15px; }
.publication-links a { padding: 7px 11px; }

.timeline { display: grid; gap: 16px; }
.timeline .item { position: relative; padding-left: 30px; }
.timeline .item::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 30px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

.content ul { margin: 12px 0 0; padding-left: 20px; }
.content li { margin-bottom: 7px; }

.contact-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: center;
  padding: 30px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #28213c, #5e46c5);
  color: white;
  box-shadow: var(--shadow);
}
.contact-card h2 { margin: 0 0 10px; color: white; }
.contact-card p { margin: 0; color: rgba(255,255,255,.82); }
.contact-card .button { background: white; border-color: white; color: #3a2a7a; }

.site-footer {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px 38px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 860px) {
  .nav-inner { min-height: auto; padding: 15px 20px; align-items: flex-start; flex-direction: column; gap: 10px; }
  .nav-links { width: 100%; overflow-x: auto; padding-bottom: 2px; }
  .page { grid-template-columns: 1fr; gap: 34px; padding: 34px 20px 56px; }
  .sidebar { position: static; display: grid; grid-template-columns: 130px 1fr; gap: 18px; }
  .profile-img { margin: 0; }
  .sidebar-meta, .social-links { grid-column: 1 / -1; }
  .card-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .sidebar { display: block; }
  .profile-img { width: 132px; margin-bottom: 16px; }
  .content h1 { font-size: 40px; }
  .item-header { display: block; }
  .year { display: inline-block; margin-top: 10px; }
  .contact-card { grid-template-columns: 1fr; }
}