:root {
  --bg: #f6f7fb;
  --bg-2: #eef2f7;
  --card: #ffffff;
  --text: #1a1f2b;
  --muted: #5a667a;
  --border: rgba(15,23,42,0.10);
  --accent: #1d4ed8;
  --accent-2: #0ea5e9;
  --accent-3: #f59e0b;
  --shadow: 0 18px 40px rgba(15,23,42,0.12);
  --radius: 18px;
  --max: 1220px;
  --font: "Space Grotesk", "Segoe UI", Arial, sans-serif;
  --title-font: "Playfair Display", "Times New Roman", serif;
  --transition: all 0.35s ease;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: var(--font); scroll-behavior: smooth; }
body { position: relative; min-height: 100vh; background: linear-gradient(180deg, var(--bg), var(--bg-2)); }
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { text-decoration: none; color: #1e40af; }

.container { max-width: var(--max); margin: 0 auto; padding: 22px; position: relative; z-index: 1; }
main { position: relative; z-index: 1; }
section { scroll-margin-top: 110px; }
h2 { font-family: var(--title-font); letter-spacing: 0.2px; font-size: 28px; margin: 0 0 12px; }
h2::after {
  content: "";
  display: block;
  width: 64px;
  height: 3px;
  margin-top: 8px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0.8;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}
.primary, .sidebar { min-width: 0; }
@media (max-width: 1100px) {
  .layout { grid-template-columns: 1fr; }
}
.sidebar { position: relative; }
.sidebar-inner {
  position: sticky;
  top: 110px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.sidebar .grid { grid-template-columns: 1fr; }
@media (max-width: 1100px) {
  .sidebar-inner { position: static; }
}

.bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(30px);
  opacity: 0.25;
  animation: float 12s ease-in-out infinite;
}
.orb-1 {
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(29,78,216,0.35), transparent 65%);
  top: -40px;
  left: -30px;
}
.orb-2 {
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(14,165,233,0.3), transparent 65%);
  top: 140px;
  right: -70px;
  animation-delay: 1.2s;
}
.orb-3 {
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(245,158,11,0.25), transparent 65%);
  bottom: -60px;
  left: 40%;
  animation-delay: 2.2s;
}
.gridlines {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(15,23,42,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(15,23,42,0.05) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(circle at 50% 20%, rgba(0,0,0,0.65), transparent 70%);
  opacity: 0.25;
}

.header {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  padding-top: 28px;
  position: relative;
  z-index: 1;
  animation: fadeInUp 1s ease-out;
  border-bottom: 1px solid rgba(15,23,42,0.08);
  padding-bottom: 18px;
}
@supports (backdrop-filter: blur(12px)) {
  .header {
    position: sticky;
    top: 0;
    background: rgba(246,247,251,0.8);
    backdrop-filter: blur(12px);
    z-index: 5;
  }
}

.brand h1 { margin: 0; font-size: 30px; letter-spacing: 0.3px; font-family: var(--title-font); }
.subtitle { margin: 8px 0 0; color: var(--muted); }
.toplinks { margin-top: 10px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.dot { opacity: 0.7; }

.nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 6px;
}
.nav a {
  color: var(--text);
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: 12px;
  transition: var(--transition);
  position: relative;
}
.nav a:hover {
  border-color: rgba(29,78,216,0.2);
  background: rgba(29,78,216,0.06);
  text-decoration: none;
  transform: translateY(-2px);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 6px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
  opacity: 0.8;
}
.nav a:hover::after { transform: scaleX(1); }
.nav a.active {
  border-color: rgba(29,78,216,0.25);
  background: rgba(29,78,216,0.08);
}
.nav a.active::after { transform: scaleX(1); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 18px;
  box-shadow: var(--shadow);
  transition: transform 0.5s ease, opacity 0.6s ease, box-shadow 0.4s ease, border-color 0.4s ease;
  opacity: 1;
  transform: none;
  position: relative;
  z-index: 1;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, rgba(29,78,216,0.25), rgba(14,165,233,0.18), rgba(245,158,11,0.12));
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.5s ease;
}
.js .card {
  opacity: 0;
  transform: translateY(22px);
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(29,78,216,0.2);
  box-shadow: 0 24px 50px rgba(15,23,42,0.18);
}
.card:hover::before { opacity: 0.8; }
.js .card.in-view {
  opacity: 1;
  transform: translateY(0);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
}
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
}

.hero h2 { margin-top: 0; font-family: var(--title-font); font-size: 30px; }
.hero-side {
  background: rgba(246,247,251,0.9);
  border: 1px solid rgba(15,23,42,0.08);
  border-radius: 16px;
  padding: 16px;
  backdrop-filter: blur(6px);
}
.badge {
  display: inline-block;
  padding: 8px 10px;
  border: 1px solid rgba(29,78,216,0.2);
  border-radius: 999px;
  background: rgba(29,78,216,0.08);
  margin-bottom: 10px;
}
.quick { margin: 10px 0 0; padding-left: 18px; color: var(--muted); }
.quick li { margin: 8px 0; }

.cta { display: flex; gap: 10px; flex-wrap: wrap; margin: 14px 0; }
.links { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 10px; color: var(--muted); }
.links a { color: var(--muted); }
.links a:hover { color: var(--text); text-decoration: none; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 14px;
  border-radius: 999px;
  border: 1px solid rgba(15,23,42,0.12);
  background: rgba(29,78,216,0.04);
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 20px rgba(15,23,42,0.12);
}
.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(29,78,216,0.18), rgba(14,165,233,0.16));
  opacity: 0;
  transition: opacity 0.3s ease;
}
.btn:hover::after { opacity: 1; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn.primary {
  background: linear-gradient(120deg, rgba(29,78,216,0.2), rgba(14,165,233,0.18));
  border-color: rgba(29,78,216,0.35);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; }
}

.panel {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  background: rgba(255,255,255,0.8);
  transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}
.panel:hover {
  transform: translateY(-4px);
  border-color: rgba(29,78,216,0.2);
  box-shadow: 0 18px 36px rgba(15,23,42,0.12);
}
.panel h3 { margin: 0 0 10px; }
.panel ul { margin: 0; padding-left: 18px; color: var(--muted); }
.panel li { margin: 7px 0; }

.timeline {
  border-left: 1px solid rgba(15,23,42,0.1);
  padding-left: 16px;
}
.timeline .item { margin-top: 16px; position: relative; padding-left: 8px; }
.timeline .item::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 0 4px rgba(29,78,216,0.12);
}
.timeline .top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  align-items: baseline;
}
.timeline h3 { margin: 0; }
.meta { color: var(--muted); font-size: 14px; margin: 6px 0 0; }
.stack { color: var(--muted); margin: 10px 0 0; }
.timeline ul { margin: 10px 0 0; padding-left: 18px; color: var(--muted); }
.timeline li { margin: 8px 0; }

.row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}
.search input {
  width: min(460px, 92vw);
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.search input::placeholder { color: rgba(165,177,196,0.7); }
.search input:focus {
  outline: none;
  border-color: rgba(29,78,216,0.45);
  box-shadow: 0 0 0 3px rgba(29,78,216,0.12);
}

.projects {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 14px;
}
@media (max-width: 900px) {
  .projects { grid-template-columns: 1fr; }
}

.project {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  background: #ffffff;
  transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}
.project:hover {
  transform: translateY(-4px);
  border-color: rgba(245,158,11,0.35);
  box-shadow: 0 18px 36px rgba(15,23,42,0.12);
}
.project h3 { margin: 0 0 6px; }
.tags { margin: 0 0 10px; color: var(--muted); font-size: 14px; }
.project p { color: var(--muted); line-height: 1.5; margin: 0 0 8px; }

.edu .edu-item { margin-top: 12px; }
.list { margin: 0; padding-left: 18px; color: var(--muted); }
.list li { margin: 9px 0; }

.award {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  background: #ffffff;
  margin-top: 14px;
}
.award h3 { margin: 0 0 6px; }
.award p { margin: 0; color: var(--muted); }

.note { color: var(--muted); }
code { color: #1d4ed8; }

.footer { text-align: center; color: var(--muted); padding: 18px 0 30px; position: relative; z-index: 1; }

@keyframes float {
  0% { transform: translateY(0); }
  50% { transform: translateY(14px); }
  100% { transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .card { opacity: 1; transform: none; }
}