:root {
  color-scheme: light dark;
  --bg: #0f172a;
  --panel: #172554;
  --text: #f8fafc;
  --subtext: #cbd5f5;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.2);
  --code-bg: #0d1b2a;
  --font: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #eff6ff;
    --panel: #ffffff;
    --text: #0f172a;
    --subtext: #475569;
    --accent: #0284c7;
    --accent-soft: rgba(2, 132, 199, 0.15);
    --code-bg: #e2e8f0;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 20%, rgba(56, 189, 248, 0.25), transparent 45%),
    var(--bg);
  font-family: var(--font);
  color: var(--text);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 32px 16px 48px;
}

main {
  width: min(1100px, 100%);
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  border-radius: 36px;
  padding: clamp(24px, 5vw, 56px);
  box-shadow: 0 28px 90px rgba(15, 23, 42, 0.4);
  border: 1px solid rgba(248, 250, 252, 0.08);
  backdrop-filter: blur(24px);
  display: grid;
  grid-template-columns: minmax(220px, 260px) minmax(0, 1fr);
  column-gap: 32px;
  row-gap: 24px;
}

header {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
  border-right: 1px solid rgba(248, 250, 252, 0.12);
  padding-right: 24px;
  grid-column: 1;
  grid-row: 1 / -1;
  position: sticky;
  top: 24px;
  align-self: flex-start;
}

header h1 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin: 0;
}

header .tagline {
  font-size: 1rem;
  color: var(--subtext);
}

.contact-icons {
  margin-top: 10px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.contact-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: #ffffff;
  border: 1px solid rgba(148, 163, 184, 0.5);
  padding: 4px;
  transition: 0.2s;
}

.contact-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.contact-icon i {
  font-size: 18px;
  color: #0f172a;
}

.contact-icon:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.45);
}

nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
}

nav a {
  display: block;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid rgba(248, 250, 252, 0.2);
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: 0.2s;
}

nav a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.lang-toggle {
  padding: 9px 22px;
  border-radius: 999px;
  border: 2px solid var(--accent);
  background: var(--accent);
  color: var(--panel);
  font-weight: 600;
  letter-spacing: 0.02em;
  font-size: 1rem;
  cursor: pointer;
  min-width: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: 0.2s;
}

.lang-toggle:hover {
  background: transparent;
  color: var(--accent);
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.35);
}

.content {
  line-height: 1.75;
  font-size: 1.05rem;
  grid-column: 2;
}

.content h1,
.content h2,
.content h3,
.content h4 {
  margin-top: 2.4rem;
  margin-bottom: 0.85rem;
  position: relative;
}

.content h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 54px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  border-radius: 999px;
}

.content p {
  margin: 1rem 0;
  color: var(--subtext);
}

.content ul,
.content ol {
  padding-left: 1.2em;
  color: var(--subtext);
}

.content li.list-subitem {
  margin-left: 1.4em;
}

.content a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent-soft);
  transition: 0.2s;
}

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

.content blockquote {
  margin: 1.6rem 0;
  padding: 1.1rem 1.5rem;
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 18px 18px 0;
  color: var(--text);
}

.profile-photo {
  width: 100%;
  max-width: 180px;
  height: auto;
  border-radius: 999px;
  object-fit: cover;
  display: block;
  margin: 1rem auto 0.5rem;
  border: 2px solid rgba(248, 250, 252, 0.2);
  box-shadow: none;
}

.pub-link {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid transparent;
  text-decoration: none;
  margin-right: 8px;
  margin-top: 4px;
}

.content a.pub-link {
  border-bottom: none;
}

.pub-link--conf {
  background: rgba(56, 189, 248, 0.16);
  color: #38bdf8;
  border-color: #38bdf8;
}

.pub-link--journal {
  background: rgba(34, 197, 94, 0.18);
  color: #4ade80;
  border-color: #4ade80;
}

.pub-link--arxiv {
  background: rgba(244, 114, 182, 0.18);
  color: #f472b6;
  border-color: #f472b6;
}

pre {
  background: var(--code-bg);
  padding: 18px;
  border-radius: 18px;
  overflow-x: auto;
  border: 1px solid rgba(248, 250, 252, 0.1);
}

code {
  font-family: "JetBrains Mono", "Fira Code", Consolas, monospace;
  font-size: 0.95rem;
}

footer {
  margin-top: 36px;
  font-size: 0.9rem;
  color: var(--subtext);
  text-align: center;
  grid-column: 2;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.status-chip span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

@media (max-width: 640px) {
  body {
    padding: 20px 12px 36px;
  }

  main {
    padding: clamp(20px, 6vw, 40px);
    display: block;
  }

  header {
    position: static;
    border-right: none;
    padding-right: 0;
    margin-bottom: 24px;
    border-bottom: 1px solid rgba(248, 250, 252, 0.12);
    padding-bottom: 20px;
  }

  nav {
    flex-direction: row;
    flex-wrap: wrap;
  }

  nav a {
    flex: 1;
    text-align: center;
  }

  .lang-toggle {
    flex: 0 0 auto;
  }
}