:root {
  --bg: #0b1220;
  --surface: #111a2c;
  --surface-2: #172238;
  --text: #eef3fb;
  --muted: #aebbd0;
  --accent: #6db7ff;
  --line: #25344f;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

.hero {
  padding: 78px 0 56px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #0d1729 0%, #0b1220 100%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.6fr .7fr;
  gap: 54px;
  align-items: center;
}
.eyebrow { color: var(--accent); font-size: 13px; letter-spacing: .12em; font-weight: 700; }
h1 { font-size: clamp(2.7rem, 6vw, 5.7rem); margin: 6px 0 18px; line-height: .98; letter-spacing: -.045em; }
.subtitle { font-size: 1.25rem; color: #d5def0; max-width: 800px; }
.credentials { color: var(--muted); font-weight: 600; }
.buttons { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.button {
  display: inline-block;
  padding: 10px 15px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--surface);
  color: var(--text);
}
.button.primary { background: var(--accent); color: #06101e; border-color: var(--accent); font-weight: 700; }
.profile-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
}
.profile-card img { width: 100%; display: block; border-radius: 13px; background: #1b2941; }
.social-links { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 15px; }
.social-links a { background: var(--surface-2); padding: 9px; text-align: center; border-radius: 8px; font-size: .9rem; }

main section { padding: 62px 0; border-bottom: 1px solid var(--line); }
h2 { font-size: 2rem; margin: 0 0 24px; letter-spacing: -.02em; }
h3 { margin-top: 0; }
.section-intro, .meta { color: var(--muted); }
.grid { display: grid; gap: 18px; }
.cards { grid-template-columns: repeat(3, 1fr); }
.card, .feature {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px;
}
.feature-grid { grid-template-columns: repeat(3, 1fr); }
.tag { display: inline-block; margin-bottom: 14px; font-size: .75rem; font-weight: 800; letter-spacing: .1em; color: var(--accent); }
.timeline { border-left: 2px solid var(--line); padding-left: 24px; display: grid; gap: 22px; }
.timeline div { display: grid; grid-template-columns: 150px 1fr; gap: 18px; }
.timeline span { color: var(--muted); }
.publication {
  display: flex;
  justify-content: space-between;
  gap: 25px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}
.pub-links { display: flex; gap: 10px; align-items: flex-start; min-width: 120px; }
footer { padding: 36px 0 54px; color: var(--muted); font-size: .9rem; }

@media (max-width: 850px) {
  .hero-grid, .cards, .feature-grid { grid-template-columns: 1fr; }
  .profile-card { max-width: 360px; }
}
@media (max-width: 600px) {
  .timeline div { grid-template-columns: 1fr; gap: 2px; }
  .publication { flex-direction: column; }
  .social-links { grid-template-columns: 1fr; }
}