:root{
  --bg: #0A0E14;
  --surface: #10161F;
  --surface-2: #141C27;
  --border: #1F2A38;
  --border-soft: #182130;
  --text: #E7ECF2;
  --text-muted: #8A96A3;
  --text-dim: #5A6675;
  --teal: #4FD8C4;
  --teal-dim: #2E7C71;
  --amber: #F2A94E;
  --amber-dim: #8A6329;
  --red: #E5697A;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --font-sans: 'Inter', system-ui, sans-serif;
  --maxw: 1120px;
}

*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important;}
}

body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(255,255,255,0.035) 1px, transparent 0);
  background-size: 28px 28px;
}

a{color:inherit; text-decoration:none;}
::selection{background:var(--teal); color:#06110F;}

a:focus-visible, button:focus-visible, .navlink:focus-visible{
  outline:2px solid var(--teal);
  outline-offset:3px;
  border-radius:2px;
}

.wrap{max-width:var(--maxw); margin:0 auto; padding:0 28px;}
section{position:relative;}

.eyebrow{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:0.06em;
  color:var(--teal);
  display:flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
}
.eyebrow::before{content:"//"; color:var(--text-dim);}

h1,h2,h3{font-family:var(--font-mono); font-weight:700; letter-spacing:-0.01em;}

/* ---------- NAV ---------- */
header.nav{
  position:fixed; top:0; left:0; right:0; z-index:100;
  backdrop-filter:blur(10px);
  background:rgba(10,14,20,0.72);
  border-bottom:1px solid var(--border-soft);
}
.nav-inner{
  max-width:var(--maxw); margin:0 auto; padding:16px 28px;
  display:flex; align-items:center; justify-content:space-between;
}
.logo{
  font-family:var(--font-mono); font-weight:600; font-size:15px; color:var(--text);
}
.logo span{color:var(--teal);}
.navlinks{display:flex; gap:28px; list-style:none;}
.navlink{
  font-family:var(--font-mono); font-size:13px; color:var(--text-muted);
  transition:color .15s ease;
  position:relative;
}
.navlink:hover, .navlink.active{color:var(--teal);}
.nav-toggle{display:none; background:none; border:1px solid var(--border); color:var(--text); font-family:var(--font-mono); font-size:12px; padding:7px 10px; border-radius:4px; cursor:pointer;}

@media (max-width:760px){
  .navlinks{
    position:fixed; top:57px; left:0; right:0;
    background:var(--surface); border-bottom:1px solid var(--border);
    flex-direction:column; gap:0; padding:8px 0;
    transform:translateY(-8px); opacity:0; pointer-events:none;
    transition:opacity .18s ease, transform .18s ease;
  }
  .navlinks.open{opacity:1; transform:translateY(0); pointer-events:auto;}
  .navlink{padding:12px 28px; display:block; border-bottom:1px solid var(--border-soft);}
  .nav-toggle{display:block;}
}

/* ---------- corner bracket panel ---------- */
.panel{
  position:relative;
  border:1px solid var(--border);
  background:var(--surface);
  padding:32px;
}
.panel::before, .panel::after{
  content:""; position:absolute; width:14px; height:14px; pointer-events:none;
}
.panel::before{ top:-1px; left:-1px; border-top:2px solid var(--teal); border-left:2px solid var(--teal); }
.panel::after{ bottom:-1px; right:-1px; border-bottom:2px solid var(--teal); border-right:2px solid var(--teal); }

/* ---------- HERO ---------- */
.hero{
  min-height:100vh;
  display:flex; align-items:center;
  padding:120px 0 80px;
}
.hero-grid{
  display:grid; grid-template-columns:1.05fr 0.95fr; gap:56px; align-items:center; width:100%;
}
@media (max-width:900px){ .hero-grid{grid-template-columns:1fr;} }

.hero-kicker{
  font-family:var(--font-mono); font-size:13px; color:var(--amber); letter-spacing:0.08em;
  margin-bottom:18px; display:flex; align-items:center; gap:10px;
}
.dot-live{width:7px; height:7px; border-radius:50%; background:var(--teal); box-shadow:0 0 0 3px rgba(79,216,196,0.15); animation:pulse 2s ease-in-out infinite;}
@keyframes pulse{ 0%,100%{opacity:1;} 50%{opacity:0.35;} }

.hero h1{
  font-size:clamp(34px, 5vw, 54px);
  line-height:1.08;
  margin-bottom:18px;
}
.hero h1 .accent{color:var(--teal);}
.hero p.lede{
  font-family:var(--font-sans); font-size:17px; color:var(--text-muted); max-width:46ch; margin-bottom:32px;
}
.cta-row{display:flex; gap:14px; flex-wrap:wrap;}
.btn{
  font-family:var(--font-mono); font-size:13.5px; padding:12px 20px;
  border:1px solid var(--border); border-radius:5px; display:inline-flex; align-items:center; gap:9px;
  transition:border-color .15s ease, transform .15s ease, background .15s ease;
}
.btn-primary{background:var(--teal); color:#06110F; border-color:var(--teal); font-weight:600;}
.btn-primary:hover{transform:translateY(-2px); box-shadow:0 6px 18px rgba(79,216,196,0.18);}
.btn-ghost{color:var(--text); }
.btn-ghost:hover{border-color:var(--teal); color:var(--teal); transform:translateY(-2px);}

/* terminal */
.term{
  background:var(--surface); border:1px solid var(--border); border-radius:8px; overflow:hidden;
  box-shadow:0 30px 60px -25px rgba(0,0,0,0.6);
}
.term-bar{
  display:flex; align-items:center; gap:7px;
  padding:11px 14px; background:var(--surface-2); border-bottom:1px solid var(--border);
}
.term-dot{width:10px; height:10px; border-radius:50%;}
.term-bar .term-title{
  margin-left:8px; font-family:var(--font-mono); font-size:11.5px; color:var(--text-dim);
}
.term-body{
  padding:22px 20px; font-family:var(--font-mono); font-size:13.5px; min-height:230px;
}
.term-line{margin-bottom:6px; white-space:pre-wrap; word-break:break-word;}
.term-prompt{color:var(--teal);}
.term-out{color:var(--text-muted); display:block; margin:2px 0 12px;}
.term-cursor{display:inline-block; width:7px; height:15px; background:var(--teal); vertical-align:middle; animation:blink 1s step-end infinite;}
@keyframes blink{ 50%{opacity:0;} }

/* ---------- SECTION HEADERS ---------- */
.sec{padding:110px 0;}
.sec-head{margin-bottom:44px;}
.sec-head h2{font-size:clamp(24px,3vw,32px); color:var(--text);}
.sec-sub{color:var(--text-muted); font-size:15px; margin-top:10px; max-width:60ch;}

/* ---------- ABOUT ---------- */
.about-grid{display:grid; grid-template-columns:1.4fr 1fr; gap:40px;}
@media (max-width:820px){ .about-grid{grid-template-columns:1fr;} }
.about-grid p{color:var(--text-muted); margin-bottom:16px; font-size:15.5px;}
.about-grid p strong{color:var(--text); font-weight:600;}
.awards{list-style:none; display:flex; flex-direction:column; gap:16px;}
.awards li{
  display:flex; gap:12px; align-items:flex-start;
  font-size:14px; color:var(--text-muted);
}
.awards .ic{color:var(--amber); font-family:var(--font-mono); font-size:13px; flex-shrink:0; padding-top:1px;}
.awards strong{color:var(--text); display:block; font-family:var(--font-sans); font-weight:600; font-size:14.5px;}

/* ---------- STACK (code block) ---------- */
.code-block{
  font-family:var(--font-mono); font-size:13.5px; line-height:1.9;
  overflow-x:auto;
}
.code-block .ln{color:var(--text-dim); user-select:none; display:inline-block; width:26px;}
.k{color:var(--teal);}
.s{color:var(--amber);}
.p{color:var(--text-dim);}
.cm{color:var(--text-dim); font-style:italic;}

/* ---------- EXPERIENCE (git log) ---------- */
.gitlog{border-left:2px solid var(--border); margin-left:6px;}
.commit{position:relative; padding:0 0 40px 30px;}
.commit:last-child{padding-bottom:4px;}
.commit::before{
  content:""; position:absolute; left:-7px; top:4px; width:12px; height:12px;
  background:var(--bg); border:2px solid var(--teal); border-radius:50%;
}
.commit-meta{
  font-family:var(--font-mono); font-size:12.5px; color:var(--text-dim);
  display:flex; gap:10px; flex-wrap:wrap; margin-bottom:6px; align-items:center;
}
.commit-hash{color:var(--amber);}
.commit-title{font-family:var(--font-sans); font-weight:600; font-size:16.5px; color:var(--text); margin-bottom:2px;}
.commit-org{color:var(--text-muted); font-size:14px; margin-bottom:12px; font-family:var(--font-sans);}
.diff{list-style:none; display:flex; flex-direction:column; gap:6px;}
.diff li{
  font-family:var(--font-mono); font-size:13.5px; color:var(--text-muted);
  padding-left:20px; position:relative;
}
.diff li::before{content:"+"; position:absolute; left:0; color:var(--teal); font-weight:700;}

/* ---------- PROJECTS ---------- */
.proj-featured{
  display:grid; grid-template-columns:1fr 1fr; gap:0; margin-bottom:32px; overflow:hidden;
}
@media (max-width:820px){ .proj-featured{grid-template-columns:1fr;} }
.proj-video{
  background:var(--surface-2); border-right:1px solid var(--border);
  display:flex; align-items:center; justify-content:center; min-height:260px;
  position:relative;
}
@media (max-width:820px){ .proj-video{border-right:none; border-bottom:1px solid var(--border);} }
.video-slot{
  width:100%; height:100%; position:absolute; inset:0;
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:12px;
  color:var(--text-dim);
}
.play-btn{
  width:56px; height:56px; border-radius:50%; border:1px solid var(--border);
  display:flex; align-items:center; justify-content:center; color:var(--teal);
  background:var(--surface);
}
.video-note{font-family:var(--font-mono); font-size:11.5px; color:var(--text-dim); text-align:center; max-width:220px;}
.proj-featured-body{padding:32px;}
.proj-tag-row{display:flex; gap:8px; flex-wrap:wrap; margin:14px 0 18px;}
.tag{
  font-family:var(--font-mono); font-size:11.5px; color:var(--teal);
  border:1px solid var(--teal-dim); padding:3px 9px; border-radius:20px;
}
.proj-featured-body h3{font-size:20px; margin-bottom:4px;}
.proj-featured-body .sub{font-family:var(--font-mono); font-size:12px; color:var(--amber); margin-bottom:14px;}
.proj-featured-body p{color:var(--text-muted); font-size:14.5px; margin-bottom:18px;}
.proj-links{display:flex; gap:16px;}
.proj-links a{
  font-family:var(--font-mono); font-size:12.5px; color:var(--text-muted); display:flex; align-items:center; gap:6px;
  border-bottom:1px solid transparent;
}
.proj-links a:hover{color:var(--teal); border-color:var(--teal);}

.proj-grid{display:grid; grid-template-columns:repeat(3, 1fr); gap:20px;}
@media (max-width:900px){ .proj-grid{grid-template-columns:repeat(2,1fr);} }
@media (max-width:600px){ .proj-grid{grid-template-columns:1fr;} }
.card{
  background:var(--surface); border:1px solid var(--border); padding:22px;
  display:flex; flex-direction:column; transition:border-color .15s ease, transform .15s ease;
}
.card:hover{border-color:var(--teal-dim); transform:translateY(-3px);}
.card h4{font-family:var(--font-sans); font-size:15.5px; font-weight:600; margin-bottom:8px;}
.card p{color:var(--text-muted); font-size:13.5px; margin-bottom:14px; flex-grow:1;}
.card .proj-tag-row{margin:0 0 14px;}
.card .tag{font-size:10.5px;}
.card .proj-links{margin-top:auto;}

/* ---------- RESEARCH ---------- */
.pub{
  border-left:2px solid var(--amber-dim); padding:4px 0 4px 20px; margin-bottom:26px;
}
.pub:last-child{margin-bottom:0;}
.pub-status{
  font-family:var(--font-mono); font-size:11px; color:var(--amber); letter-spacing:0.05em;
  border:1px solid var(--amber-dim); padding:2px 8px; border-radius:20px; display:inline-block; margin-bottom:10px;
}
.pub h4{font-family:var(--font-sans); font-size:16px; font-weight:600; margin-bottom:5px; line-height:1.4;}
.pub .venue{color:var(--text-dim); font-size:13px; font-family:var(--font-mono); margin-bottom:8px;}
.pub .topics{color:var(--text-muted); font-size:13.5px;}

/* certifications strip */
.cert-strip{
  display:flex; flex-wrap:wrap; gap:10px;
}
.cert-chip{
  font-family:var(--font-mono); font-size:12px; color:var(--text-muted);
  border:1px solid var(--border); padding:8px 14px; border-radius:5px;
  display:flex; gap:8px; align-items:center;
}
.cert-chip .yr{color:var(--text-dim);}

/* ---------- CONTACT ---------- */
.contact-panel{
  display:grid; grid-template-columns:1.2fr 1fr; gap:40px; align-items:center;
}
@media (max-width:820px){ .contact-panel{grid-template-columns:1fr;} }
.contact-panel h2{font-size:clamp(24px,3.4vw,34px); margin-bottom:14px;}
.contact-panel p{color:var(--text-muted); font-size:15px; margin-bottom:24px; max-width:48ch;}
.contact-links{display:flex; flex-direction:column; gap:14px;}
.clink{
  display:flex; align-items:center; gap:12px; font-family:var(--font-mono); font-size:14px;
  color:var(--text-muted); padding:10px 0; border-bottom:1px solid var(--border-soft);
}
.clink svg{color:var(--teal); flex-shrink:0;}
.clink:hover{color:var(--text);}
.langs{display:flex; gap:24px; margin-top:8px;}
.lang{font-family:var(--font-mono); font-size:12.5px; color:var(--text-dim);}
.lang b{color:var(--text-muted); display:block; font-size:13px; margin-bottom:2px;}

/* ---------- FOOTER (status bar) ---------- */
footer{
  border-top:1px solid var(--border-soft);
  padding:16px 0; background:var(--surface);
}
.status-bar{
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:8px;
  font-family:var(--font-mono); font-size:11.5px; color:var(--text-dim);
}
.status-bar .seg{display:flex; align-items:center; gap:6px;}
.status-ok{color:var(--teal);}

.reveal{opacity:0; transform:translateY(16px); transition:opacity .5s ease, transform .5s ease;}
.reveal.in{opacity:1; transform:translateY(0);}