:root {
  --bg: #07101c;
  --bg-elevated: #0b1624;
  --bg-soft: #0e1a2a;
  --card: rgba(14, 26, 42, 0.76);
  --text: #f4f7fb;
  --muted: #9ba9ba;
  --line: rgba(255,255,255,0.11);
  --line-strong: rgba(255,255,255,0.2);
  --accent: #7ee7d3;
  --accent-2: #94b7ff;
  --accent-dim: rgba(126,231,211,0.14);
  --shadow: 0 24px 70px rgba(0,0,0,0.32);
  --radius: 24px;
  --max: 1180px;
}

html[data-theme="light"] {
  --bg: #f5f7f9;
  --bg-elevated: #ffffff;
  --bg-soft: #edf1f5;
  --card: rgba(255,255,255,0.85);
  --text: #101723;
  --muted: #5e6c7b;
  --line: rgba(16,23,35,0.11);
  --line-strong: rgba(16,23,35,0.2);
  --accent: #087f72;
  --accent-2: #315fc4;
  --accent-dim: rgba(8,127,114,0.1);
  --shadow: 0 24px 70px rgba(38,49,61,0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(circle at 12% 8%, rgba(126,231,211,0.10), transparent 28%),
    radial-gradient(circle at 90% 22%, rgba(148,183,255,0.10), transparent 25%);
  pointer-events: none;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
.container { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.section { padding: 112px 0; }
.section-bordered { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-soft { background: var(--bg-soft); }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 999; padding: 10px 14px; background: var(--text); color: var(--bg); border-radius: 8px; }
.skip-link:focus { top: 12px; }

.site-header { position: sticky; top: 0; z-index: 50; backdrop-filter: blur(18px); background: color-mix(in srgb, var(--bg) 80%, transparent); border-bottom: 1px solid var(--line); }
.nav { height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -0.02em; }
.brand-mark { width: 36px; height: 36px; border: 1px solid var(--line-strong); border-radius: 11px; display: grid; place-items: center; color: var(--accent); font-size: 0.78rem; }
.nav-links { display: flex; gap: 28px; color: var(--muted); font-size: 0.92rem; }
.nav-links a { transition: color .2s ease; }
.nav-links a:hover { color: var(--text); }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.icon-button { width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--line); background: transparent; color: var(--text); cursor: pointer; }

.button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 13px 18px; border-radius: 12px; background: var(--text); color: var(--bg); font-weight: 700; font-size: 0.92rem; border: 1px solid var(--text); transition: transform .2s ease, opacity .2s ease; }
.button:hover { transform: translateY(-2px); opacity: .92; }
.button-ghost { background: transparent; color: var(--text); border-color: var(--line-strong); }
.button-small { padding: 9px 13px; border-radius: 10px; font-size: .84rem; }

.hero { min-height: calc(100vh - 76px); display: grid; grid-template-columns: 1.15fr .85fr; gap: 70px; align-items: center; padding-top: 88px; padding-bottom: 88px; }
.eyebrow { margin: 0 0 20px; color: var(--muted); font-size: .78rem; letter-spacing: .13em; text-transform: uppercase; font-weight: 700; }
.status-dot { display: inline-block; width: 8px; height: 8px; margin-right: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 6px var(--accent-dim); vertical-align: 1px; }
h1,h2,h3,p { margin-top: 0; }
h1 { font-size: clamp(3.6rem, 7.2vw, 7.2rem); line-height: .92; letter-spacing: -0.065em; margin-bottom: 30px; max-width: 920px; }
.accent-text { color: var(--accent); }
.hero-lede { max-width: 740px; color: var(--muted); font-size: clamp(1.04rem, 1.4vw, 1.2rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 34px 0 44px; }
.hero-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; border-top: 1px solid var(--line); padding-top: 24px; max-width: 700px; }
.hero-metrics strong { display: block; font-size: 1.22rem; }
.hero-metrics span { color: var(--muted); font-size: .82rem; }
.hero-panel { display: grid; gap: 20px; }
.profile-orbit { width: min(100%, 420px); aspect-ratio: 1; margin-left: auto; position: relative; display: grid; place-items: center; }
.avatar-wrap { width: 58%; aspect-ratio: 1; border-radius: 32%; overflow: hidden; position: relative; z-index: 2; border: 1px solid var(--line-strong); box-shadow: var(--shadow); background: var(--bg-elevated); }
.avatar-wrap img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.88) contrast(1.03); }
.orbit { position: absolute; border: 1px solid var(--line); border-radius: 50%; }
.orbit-one { width: 84%; height: 84%; animation: spin 16s linear infinite; }
.orbit-one::after { content:""; position:absolute; width: 10px; height:10px; border-radius:50%; background: var(--accent); top: 12%; left: 18%; box-shadow: 0 0 24px var(--accent); }
.orbit-two { width: 100%; height: 58%; transform: rotate(-22deg); }
@keyframes spin { to { transform: rotate(360deg); } }
.terminal-card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; overflow: hidden; box-shadow: var(--shadow); }
.terminal-top { display:flex; gap:6px; padding: 12px 14px; border-bottom:1px solid var(--line); }
.terminal-top span { width:8px; height:8px; border-radius:50%; background: var(--line-strong); }
.terminal-card pre { margin:0; padding: 20px; overflow:auto; color:var(--muted); font: 12px/1.75 ui-monospace, SFMono-Regular, Menlo, monospace; }
.code-key { color: var(--accent-2); } .code-value { color: var(--accent); }

.two-col { display: grid; grid-template-columns: .8fr 1.2fr; gap: 100px; }
.section-heading h2 { font-size: clamp(2.3rem, 4.4vw, 4.8rem); line-height: 1.03; letter-spacing: -0.05em; margin-bottom: 0; }
.section-heading-row { display: flex; justify-content: space-between; align-items: end; gap: 50px; margin-bottom: 54px; }
.section-heading-row > p { max-width: 430px; margin-bottom: 6px; color: var(--muted); }
.about-copy { font-size: 1.18rem; color: var(--muted); }
.about-copy p { margin-bottom: 24px; }
.availability-card { margin-top: 34px; display: flex; align-items: center; gap: 16px; padding: 20px; border: 1px solid var(--line); border-radius: 18px; background: var(--card); }
.availability-card strong, .availability-card span { display:block; }
.availability-card strong { color:var(--text); font-size:.98rem; }
.availability-card div span { font-size:.9rem; }

.timeline { border-top: 1px solid var(--line); }
.timeline-item { display: grid; grid-template-columns: .38fr 1fr; gap: 50px; padding: 40px 0; border-bottom: 1px solid var(--line); }
.timeline-meta { display: flex; flex-direction: column; gap: 5px; color: var(--muted); font-size: .9rem; }
.timeline-meta span:last-child { color: var(--accent); }
.timeline-body h3 { font-size: 1.55rem; letter-spacing: -0.03em; margin-bottom: 12px; }
.timeline-body p { max-width: 820px; color: var(--muted); }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.tag-row span { padding: 6px 10px; border:1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: .76rem; background: color-mix(in srgb, var(--bg-elevated) 75%, transparent); }

.skill-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 50px; }
.skill-card { min-height: 250px; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); display: flex; flex-direction: column; }
.skill-card:hover { border-color: var(--line-strong); }
.skill-index { color: var(--accent); font: 600 .78rem/1 ui-monospace, monospace; }
.skill-card h3 { margin: auto 0 12px; font-size: 1.42rem; }
.skill-card p { color: var(--muted); margin: 0; font-size: .94rem; }

.project-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.project-card { min-height: 420px; padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); display: flex; flex-direction: column; overflow: hidden; position: relative; }
.project-card::before { content:""; position:absolute; inset:auto -15% -35% auto; width:220px; height:220px; border-radius:50%; background: radial-gradient(circle, var(--accent-dim), transparent 65%); pointer-events:none; }
.project-card-large { grid-row: span 2; min-height: 856px; }
.project-top { display:flex; justify-content:space-between; gap:20px; color:var(--muted); font-size:.76rem; text-transform:uppercase; letter-spacing:.1em; }
.project-number { color:var(--accent); }
.project-card h3 { margin: auto 0 14px; max-width: 530px; font-size: clamp(1.55rem, 2.5vw, 2.5rem); line-height:1.1; letter-spacing:-.04em; }
.project-card p { color:var(--muted); max-width:600px; }
.project-stat { border-top:1px solid var(--line); margin-top:24px; padding-top:20px; }
.project-stat strong, .project-stat span { display:block; }
.project-stat strong { font-size:1.7rem; color:var(--accent); }
.project-stat span { color:var(--muted); font-size:.84rem; }
.github-block { margin-top: 70px; border-top: 1px solid var(--line); padding-top: 34px; }
.github-heading { display:flex; justify-content:space-between; gap:20px; align-items:end; margin-bottom: 20px; }
.github-heading h3 { margin:0; font-size:1.5rem; }
.github-heading .eyebrow { margin-bottom:6px; }
.github-heading > a { color: var(--accent); font-size:.9rem; }
.repo-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:12px; }
.repo-card { border:1px solid var(--line); border-radius:18px; padding:22px; background:var(--card); min-height:190px; display:flex; flex-direction:column; transition:transform .2s ease, border-color .2s ease; }
.repo-card:hover { transform:translateY(-3px); border-color:var(--line-strong); }
.repo-card h4 { margin:0 0 10px; font-size:1rem; word-break:break-word; }
.repo-card p { margin:0 0 16px; color:var(--muted); font-size:.86rem; }
.repo-meta { margin-top:auto; display:flex; gap:14px; color:var(--muted); font-size:.76rem; }
.repo-language::before { content:""; display:inline-block; width:7px; height:7px; margin-right:6px; border-radius:50%; background:var(--accent); }
.repo-loading { grid-column:1/-1; color:var(--muted); padding:24px 0; }

.research-grid { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.research-card { border:1px solid var(--line); border-radius:var(--radius); padding:34px; min-height:330px; display:flex; flex-direction:column; background:var(--card); transition:transform .2s ease, border-color .2s ease; }
.research-card:hover { transform:translateY(-3px); border-color:var(--line-strong); }
.research-year { color:var(--accent); font:600 .8rem ui-monospace,monospace; }
.research-card h3 { margin:auto 0 14px; font-size:1.6rem; line-height:1.16; letter-spacing:-.03em; max-width:500px; }
.research-card p { color:var(--muted); }
.text-link { margin-top:14px; color:var(--accent); font-size:.88rem; }

.education-list { margin-top:50px; border-top:1px solid var(--line); }
.education-item { display:flex; justify-content:space-between; gap:50px; align-items:center; padding:32px 0; border-bottom:1px solid var(--line); }
.education-year { color:var(--muted); font-size:.82rem; }
.education-item h3 { margin:6px 0 0; font-size:1.35rem; }
.education-item p { margin:0; color:var(--muted); }

.contact-section { background:linear-gradient(135deg, var(--bg-soft), var(--bg)); border-top:1px solid var(--line); }
.contact-grid { display:grid; grid-template-columns:1fr 1fr; gap:90px; align-items:start; }
.contact-grid h2 { font-size:clamp(2.5rem,5vw,5.4rem); line-height:.98; letter-spacing:-.055em; margin-bottom:24px; }
.contact-lede { color:var(--muted); max-width:620px; }
.contact-actions { border-top:1px solid var(--line); }
.contact-link { display:grid; grid-template-columns:100px 1fr auto; align-items:center; gap:20px; padding:22px 0; border-bottom:1px solid var(--line); }
.contact-link span:first-child { color:var(--muted); font-size:.82rem; }
.contact-link strong { font-size:.96rem; overflow-wrap:anywhere; }
.contact-link span:last-child { color:var(--accent); }

.footer { border-top:1px solid var(--line); padding:28px 0; color:var(--muted); font-size:.8rem; }
.footer-inner { display:flex; justify-content:space-between; gap:20px; align-items:center; }
.footer p { margin:0; }
.footer a { color:var(--text); }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity:1; transform:none; }

@media (max-width: 920px) {
  .nav-links { display:none; }
  .hero { grid-template-columns:1fr; gap:45px; min-height:auto; }
  .hero-panel { grid-template-columns: .8fr 1.2fr; align-items:center; }
  .profile-orbit { width:100%; }
  .two-col, .contact-grid { grid-template-columns:1fr; gap:48px; }
  .section-heading-row { display:block; }
  .section-heading-row > p { margin-top:20px; }
  .skill-grid, .repo-grid { grid-template-columns:repeat(2,1fr); }
  .project-card-large { grid-row:auto; min-height:420px; }
}

@media (max-width: 660px) {
  .container { width:min(calc(100% - 28px), var(--max)); }
  .section { padding:76px 0; }
  .brand-name { display:none; }
  .nav { height:68px; }
  .nav-actions .button-small { display:none; }
  .hero { padding-top:60px; }
  h1 { font-size:clamp(3.2rem,17vw,5rem); }
  .hero-metrics { grid-template-columns:1fr; gap:14px; }
  .hero-panel { grid-template-columns:1fr; }
  .profile-orbit { width:82%; margin:0 auto; }
  .timeline-item { grid-template-columns:1fr; gap:18px; }
  .skill-grid, .project-grid, .research-grid, .repo-grid { grid-template-columns:1fr; }
  .skill-card { min-height:210px; }
  .education-item { display:block; }
  .education-item p { margin-top:12px; }
  .github-heading { align-items:start; flex-direction:column; }
  .contact-link { grid-template-columns:70px 1fr auto; gap:12px; }
  .footer-inner { flex-direction:column; align-items:flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior:auto; }
  *, *::before, *::after { animation-duration:.01ms !important; animation-iteration-count:1 !important; transition-duration:.01ms !important; }
  .reveal { opacity:1; transform:none; }
}
.notfound { min-height:70vh; display:grid; place-items:center; text-align:center; }
.notfound h1 { font-size:clamp(3rem,10vw,7rem); }