/* Fresh pastel palette — mint / sky / peach */
:root {
  --bg: #f4fbf8;
  --bg-2: #ffffff;
  --surface: rgba(95,179,182,0.06);
  --surface-2: rgba(95,179,182,0.10);
  --border: rgba(95,179,182,0.18);
  --text: #1f3a3d;
  --text-2: #4b6669;
  --muted: #7a8e90;
  --accent: #4cb5ae;     /* mint */
  --accent-2: #6fb1e8;   /* sky */
  --accent-3: #f6a98a;   /* peach */
  --dot: rgba(76,181,174,0.30);
  --shadow: 0 10px 40px rgba(76,181,174,0.12);
}
:root[data-theme="dark"] {
  --bg: #0e1a1c;
  --bg-2: #122225;
  --surface: rgba(255,255,255,0.04);
  --surface-2: rgba(255,255,255,0.07);
  --border: rgba(255,255,255,0.10);
  --text: #e6f1f0;
  --text-2: #a8c0c1;
  --muted: #7c9395;
  --accent: #6fdcd2;
  --accent-2: #8fc4ef;
  --accent-3: #ffb89a;
  --dot: rgba(111,220,210,0.25);
  --shadow: 0 10px 40px rgba(0,0,0,0.45);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: radial-gradient(1100px 550px at 85% -10%, rgba(76,181,174,0.18), transparent 60%),
              radial-gradient(900px 500px at -10% 25%, rgba(111,177,232,0.16), transparent 60%),
              radial-gradient(700px 400px at 50% 110%, rgba(246,169,138,0.14), transparent 60%),
              var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
:root[data-theme="dark"] body {
  background: radial-gradient(1100px 550px at 85% -10%, rgba(111,220,210,0.18), transparent 60%),
              radial-gradient(900px 500px at -10% 25%, rgba(143,196,239,0.14), transparent 60%),
              var(--bg);
}
#bg-canvas {
  position: fixed; inset: 0;
  z-index: -1;
  width: 100vw; height: 100vh;
  pointer-events: none;
}
a { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent-2); }

/* NAV */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1080px; margin: 0 auto;
  padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
}
.brand {
  font-weight: 800; font-size: 1.2rem; letter-spacing: .5px;
  color: var(--text);
}
.brand span { color: var(--accent); }
.nav-links { display: flex; gap: 22px; font-size: .92rem; }
.nav-links a { color: var(--text-2); font-weight: 500; }
.nav-links a:hover { color: var(--text); }
#theme-toggle {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  width: 36px; height: 36px; border-radius: 10px;
  cursor: pointer; transition: all .2s;
}
#theme-toggle:hover { background: var(--surface-2); transform: translateY(-1px); }

/* HERO */
.hero { padding: 80px 24px 60px; }
.hero-inner {
  max-width: 1080px; margin: 0 auto;
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 50px;
  align-items: center;
}
.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .82rem; font-weight: 600;
  color: var(--text-2);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 6px 14px; border-radius: 999px;
  margin: 0 0 20px;
}
.kicker .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-3);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-3) 30%, transparent);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; }
  50% { opacity: .4; }
}
h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 800; line-height: 1.1;
  margin: 0 0 18px; letter-spacing: -1.5px;
}
.grad {
  background: linear-gradient(135deg, var(--accent), var(--accent-2) 50%, var(--accent-3));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.tagline {
  font-size: 1.15rem; color: var(--text-2);
  margin: 0 0 22px;
}
.bio { color: var(--text-2); margin: 0 0 14px; max-width: 60ch; }
.bio b { color: var(--text); font-weight: 600; }

.cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: 10px;
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text); font-weight: 500; font-size: .92rem;
  transition: all .2s;
}
.btn:hover { background: var(--surface-2); transform: translateY(-2px); color: var(--text); }
.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent; color: #fff;
  box-shadow: 0 6px 20px color-mix(in srgb, var(--accent) 40%, transparent);
}
.btn.primary:hover { color: #fff; opacity: .95; }

.hero-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px; padding: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}
.avatar-ring {
  width: 140px; height: 140px;
  margin: 0 auto 20px;
  border-radius: 50%;
  padding: 4px;
  background: conic-gradient(from 0deg, var(--accent), var(--accent-2), var(--accent-3), var(--accent));
  animation: spin 8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.avatar {
  width: 100%; height: 100%; border-radius: 50%;
  background: var(--bg-2);
  overflow: hidden;
  animation: spin 8s linear infinite reverse;
}
.avatar img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.quick-facts { list-style: none; padding: 0; margin: 0; }
.quick-facts li {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 0;
  color: var(--text-2); font-size: .92rem;
  border-bottom: 1px dashed var(--border);
}
.quick-facts li:last-child { border-bottom: 0; }
.quick-facts i { color: var(--accent); width: 18px; }

/* SECTIONS */
.section { max-width: 1080px; margin: 0 auto; padding: 60px 24px; }
.section h2, .footer h2 {
  font-size: 1.6rem; font-weight: 700;
  margin: 0 0 30px;
  letter-spacing: -.5px;
}
.hash { color: var(--accent); font-family: 'JetBrains Mono', monospace; margin-right: 4px; }
.muted { color: var(--muted); font-size: .92rem; }

/* CARDS */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.cards.cards-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1100px) { .cards.cards-4 { grid-template-columns: repeat(2, 1fr); } }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px; padding: 24px;
  transition: all .25s;
}
.card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--accent) 50%, var(--border)); }
.card-icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 25%, transparent), color-mix(in srgb, var(--accent-2) 25%, transparent));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; color: var(--accent);
  margin-bottom: 14px;
}
.card h3 { margin: 0 0 8px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--text-2); font-size: .92rem; }

/* NEWS */
.news { list-style: none; padding: 0; margin: 0; }
.news li {
  display: flex; align-items: flex-start;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-2); font-size: .95rem;
  line-height: 1.6;
}
.news li:last-child { border-bottom: 0; }
.news li > span:last-child { flex: 1; }
.news .date {
  flex: 0 0 80px;
  font-family: 'JetBrains Mono', monospace;
  font-size: .85rem; color: var(--accent);
  font-weight: 600;
  padding-top: 2px;
}
.news b { color: var(--text); font-weight: 600; }

/* PUBLICATIONS */
.pub {
  display: grid; grid-template-columns: 90px 1fr;
  gap: 20px; padding: 18px 0;
  border-bottom: 1px solid var(--border);
}
.venue {
  text-align: center;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 18%, transparent), color-mix(in srgb, var(--accent-2) 18%, transparent));
  border: 1px solid var(--border);
  border-radius: 12px; padding: 12px 8px;
  font-weight: 700; font-size: .85rem;
  color: var(--accent);
  align-self: start;
  font-family: 'JetBrains Mono', monospace;
}
.venue span { display: block; font-size: .75rem; color: var(--text-2); margin-top: 2px; }
.pub-body h3 { margin: 0 0 6px; font-size: 1rem; font-weight: 600; line-height: 1.4; }
.pub-body h3 a { color: var(--text); }
.pub-body h3 a:hover { color: var(--accent); }
.pub-group {
  margin: 28px 0 12px;
  font-size: .85rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
}
.pub-group::before { content: "// "; opacity: .6; }
.authors { margin: 0; color: var(--text-2); font-size: .88rem; }
.authors b { color: var(--text); }

/* TIMELINE */
.timeline { position: relative; padding-left: 22px; }
.timeline::before {
  content: ''; position: absolute;
  left: 6px; top: 8px; bottom: 8px;
  width: 2px; background: var(--border);
}
.tl-item { position: relative; padding-bottom: 24px; }
.tl-dot {
  position: absolute; left: -22px; top: 6px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 25%, transparent);
}
.tl-content h3 { margin: 0 0 4px; font-size: 1.05rem; }
.tl-content p { margin: 4px 0; color: var(--text-2); }

/* TWO COL */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.two-col h3 { font-size: 1.05rem; margin: 0 0 10px; }
.plain { list-style: none; padding: 0; margin: 0; }
.plain li { padding: 6px 0; color: var(--text-2); border-bottom: 1px dashed var(--border); }
.plain li:last-child { border-bottom: 0; }
.plain b { color: var(--text); }

/* FOOTER */
.footer {
  max-width: 1080px; margin: 40px auto 0;
  padding: 50px 24px 40px;
  border-top: 1px solid var(--border);
  text-align: center;
}
.footer .cta { justify-content: center; margin: 24px 0 30px; }
.copyright { color: var(--muted); font-size: .85rem; margin: 0; }

/* RESPONSIVE */
@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero-card { order: -1; max-width: 320px; margin: 0 auto; }
  .cards { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
  .pub { grid-template-columns: 70px 1fr; gap: 14px; }
  .nav-links { display: none; }
  .news li { gap: 12px; }
  .news .date { flex: 0 0 70px; }
}