/* ---------------------------
  Design System
---------------------------- */
:root{
  --bg:#070a12;
  --bg2:#0b1020;
  --card:rgba(255,255,255,.06);
  --card2:rgba(255,255,255,.08);
  --line:rgba(255,255,255,.12);
  --text:rgba(255,255,255,.92);
  --muted:rgba(255,255,255,.70);
  --faint:rgba(255,255,255,.14);
  --shadow:0 18px 60px rgba(0,0,0,.42);
  --r:18px;
  --r2:26px;
  --max:1120px;

  --a:#7c3aed; /* violet */
  --b:#06b6d4; /* cyan */
  --c:#22c55e; /* green */
  --d:#f59e0b; /* amber */
  --ring:0 0 0 4px rgba(6,182,212,.18);
}

[data-theme="light"]{
  --bg:#f5f7fc;
  --bg2:#eef2fb;
  --card:rgba(15,23,42,.06);
  --card2:rgba(15,23,42,.08);
  --line:rgba(15,23,42,.12);
  --text:rgba(15,23,42,.92);
  --muted:rgba(15,23,42,.68);
  --faint:rgba(15,23,42,.14);
  --shadow:0 20px 70px rgba(15,23,42,.14);
  --ring:0 0 0 4px rgba(124,58,237,.18);
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color:var(--text);
  background:
    radial-gradient(1200px 900px at 8% 12%, rgba(124,58,237,.25), transparent 60%),
    radial-gradient(1000px 800px at 92% 14%, rgba(6,182,212,.18), transparent 55%),
    radial-gradient(900px 700px at 55% 92%, rgba(34,197,94,.16), transparent 55%),
    linear-gradient(180deg, var(--bg), var(--bg2));
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
::selection{background:rgba(124,58,237,.35)}

/* subtle grain overlay */
.grain{
  pointer-events:none;
  position:fixed; inset:0; z-index:0;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='260' height='260'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='260' height='260' filter='url(%23n)' opacity='.18'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-size:cover;
  background-position:center;
  mix-blend-mode:overlay;
  opacity:.22;
  animation: grain 10s steps(10) infinite;
}
@keyframes grain{
  0%,100%{transform:translate(0,0)}
  15%{transform:translate(-2%,-4%)}
  30%{transform:translate(4%,-6%)}
  45%{transform:translate(-6%,2%)}
  60%{transform:translate(6%,5%)}
  75%{transform:translate(2%,-3%)}
  90%{transform:translate(-3%,6%)}
}

/* top progress */
.progress{
  position:fixed; top:0; left:0; right:0; height:3px; z-index:80;
  background:linear-gradient(90deg,var(--a),var(--b),var(--c));
  transform-origin:left;
  transform:scaleX(0);
  box-shadow:0 0 24px rgba(124,58,237,.35);
}

.wrap{max-width:var(--max); margin:0 auto; padding:26px 18px 90px; position:relative; z-index:1}

/* header */
header{
  position:sticky; top:0; z-index:70;
  backdrop-filter: blur(14px);
  background: linear-gradient(180deg, rgba(0,0,0,.22), transparent);
  border-bottom:1px solid var(--faint);
}
.nav{
  max-width:var(--max);
  margin:0 auto;
  padding:14px 18px;
  display:flex; align-items:center; justify-content:space-between; gap:12px;
}
.brand{
  display:flex; align-items:center; gap:12px; font-weight:800; letter-spacing:.2px;
}
.logo{
  width:38px; height:38px; border-radius:14px;
  background: conic-gradient(from 220deg, var(--a), var(--b), var(--c), var(--a));
  box-shadow:var(--shadow);
  position:relative; overflow:hidden;
}
.logo:after{
  content:"";
  position:absolute; inset:-30%;
  background: radial-gradient(circle at 25% 30%, rgba(255,255,255,.85), transparent 45%);
  opacity:.35;
  transform:rotate(18deg);
}
.grad{
  background:linear-gradient(90deg,var(--a),var(--b),var(--c));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}

.pill{
  display:flex; gap:10px; align-items:center;
  padding:8px 10px;
  border-radius:999px;
  border:1px solid var(--faint);
  background:rgba(255,255,255,.05);
}
.pill a{
  padding:8px 10px;
  border-radius:999px;
  color:var(--muted);
  transition:.2s ease;
  white-space:nowrap;
}
.pill a:hover{background:rgba(255,255,255,.06); color:var(--text)}
.pill a.active{background:rgba(124,58,237,.15); color:var(--text); border:1px solid rgba(124,58,237,.22)}

.nav-actions{
  display:flex;
  gap:10px;
  align-items:center;
}

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  padding:10px 14px;
  border-radius:999px;
  border:1px solid var(--faint);
  background:rgba(255,255,255,.05);
  cursor:pointer;
  transition:.2s ease;
  user-select:none;
}
.btn:hover{transform:translateY(-1px); background:rgba(255,255,255,.08)}
.btn:focus{outline:none; box-shadow:var(--ring)}
.btn.primary{
  border-color:rgba(255,255,255,.14);
  background:linear-gradient(90deg, rgba(124,58,237,.92), rgba(6,182,212,.86));
  color:#fff;
}
.icon{width:18px;height:18px; display:inline-block}

/* cards / layout */
.grid{display:grid; grid-template-columns:repeat(12,1fr); gap:18px;}
.card{
  border-radius:var(--r2);
  border:1px solid var(--faint);
  background:var(--card);
  box-shadow:var(--shadow);
  overflow:hidden;
  position:relative;
}
.pad{padding:22px}

/* hero */
.hero{padding:22px 0 6px}
.hero .left{grid-column: span 7}
.hero .right{grid-column: span 5}

.kicker{
  display:inline-flex; gap:10px; align-items:center;
  padding:8px 10px;
  border-radius:999px;
  border:1px solid var(--faint);
  background:rgba(255,255,255,.04);
  color:var(--muted);
  font-size:13px;
}
.dot{width:8px;height:8px;border-radius:99px;background:var(--c); display:inline-block}
h1{
  margin:14px 0 10px;
  font-size: clamp(30px, 4.4vw, 52px);
  line-height:1.06;
  letter-spacing:-0.02em;
}
.subtitle{
  margin:0 0 16px;
  color:var(--muted);
  line-height:1.65;
  max-width:72ch;
}
.heroActions{display:flex; flex-wrap:wrap; gap:10px; align-items:center}
.toast{
  background:rgba(0,0,0,.6); color:#fff; font-size:12px;
  padding:6px 10px; border-radius:999px; opacity:0; transform:translateY(4px);
  transition:.2s ease; margin-left:6px
}

.block{display:block}
.min-width-zero{min-width:0}
.muted-text{color:var(--muted)}
.list-spaced{margin-top:10px}
.chips-spaced{margin-top:12px}
.mini-block{display:block; margin-top:6px}
.footer-actions{display:flex; gap:10px; align-items:center}

.factChart--a{--ring-color:var(--a)}
.factChart--b{--ring-color:var(--b)}
.factChart--c{--ring-color:var(--c)}

.chips{display:flex; flex-wrap:wrap; gap:8px; margin-top:12px; margin-bottom:12px}
.chip{
  font-size:12px; padding:6px 10px; border-radius:999px;
  border:1px solid var(--faint); background:rgba(255,255,255,.05);
  color:var(--muted)
}

.contactBox{padding:20px}
.contactBox .contactTop{display:flex; justify-content:space-between; align-items:flex-start; gap:10px}
.mini{font-size:12px; color:var(--muted)}
.contactBody{margin-top:12px; display:flex; flex-direction:column; gap:10px}
.row{display:flex; align-items:center; justify-content:space-between; gap:12px; border:1px solid var(--faint); border-radius:14px; padding:12px; background:rgba(255,255,255,.04)}
.row b{display:block}
.facts{display:grid; grid-template-columns:repeat(3,1fr); gap:10px; margin-top:14px}
.fact{
  border:1px solid var(--faint);
  border-radius:14px;
  padding:12px;
  text-align:center;
  background:rgba(255,255,255,.04);
  display:grid;
  gap:8px;
  place-items:center;
}
.fact b{font-size:20px}
.factChart{
  width:86px;
  height:86px;
  display:grid;
  place-items:center;
  position:relative;
}
.factChart::after{
  content:"";
  position:absolute;
  inset:6px;
  border-radius:50%;
  background:radial-gradient(circle at 30% 28%, rgba(255,255,255,.2), transparent 55%);
  opacity:.6;
  pointer-events:none;
}
.statRing{width:100%; height:100%; transform:rotate(-90deg)}
.statRingTrack{
  fill:none;
  stroke:rgba(255,255,255,.1);
  stroke-width:10;
}
.statRingValue{
  fill:none;
  stroke:var(--ring-color, var(--b));
  stroke-width:10;
  stroke-linecap:round;
  filter: drop-shadow(0 0 10px color-mix(in srgb, var(--ring-color, var(--b)) 45%, transparent));
  stroke-dasharray: 290;
  stroke-dashoffset: 290;
}
@media (prefers-reduced-motion: reduce){
  .statRingValue{transition:none}
}

.sectionHead{display:flex; justify-content:space-between; align-items:flex-end; gap:12px; margin:26px 0 14px}
.sectionHead h2{margin:0; font-size:24px}
.sectionHead p{margin:6px 0 0; color:var(--muted)}

/* timeline / experience */
.timeline{grid-column: span 12}
.timeline .tl{display:flex; flex-direction:column; gap:18px}
.job{display:grid; grid-template-columns:220px 1fr; gap:18px; padding:14px; border-radius:16px; background:rgba(255,255,255,.03); border:1px solid var(--faint)}
.job .when{color:var(--muted); font-size:13px}
.job h3{margin:0 0 6px}
.role{font-size:17px}
.org{color:var(--muted); font-size:13px; margin-bottom:8px}
.stack{display:flex; flex-wrap:wrap; gap:6px; margin-top:10px}
.tag{font-size:11px; padding:4px 8px; border-radius:999px; background:rgba(124,58,237,.14); border:1px solid rgba(124,58,237,.2)}

/* impact */
.ach{grid-column: span 12; display:grid; gap:16px; grid-template-columns:minmax(0,2fr) minmax(0,1fr)}
.ach .listCard{grid-column:1 / 2}
.ach .metricStack{grid-column:2 / 3; display:flex; flex-direction:column; gap:16px}
.listCard{border-radius:14px; padding:14px; border:1px solid var(--faint); background:rgba(255,255,255,.04)}
.listCard ul{margin:8px 0 0 18px; color:var(--muted)}
.metric{border:1px dashed var(--faint); padding:12px; border-radius:12px; color:var(--muted)}

/* skills */
.skills{grid-column: span 5}
.skillGrid{display:grid; gap:10px}
.skillItem{border:1px solid var(--faint); border-radius:14px; padding:12px; background:rgba(255,255,255,.04)}
.skillItem .top{display:flex; justify-content:space-between; gap:10px; color:var(--muted)}
.skillItem .top b{color:var(--text)}
.bar{height:8px; border-radius:999px; background:rgba(255,255,255,.06); overflow:hidden; margin-top:8px}
.bar i{display:block; height:100%; width:0%; background:linear-gradient(90deg,var(--a),var(--b),var(--c)); border-radius:999px; transition:1.2s ease}

/* education */
footer{margin-top:26px; display:flex; justify-content:space-between; align-items:center; gap:12px; color:var(--muted)}

/* reveal on scroll */
.reveal{opacity:0; transform:translateY(14px); transition:.6s ease}
.reveal.in{opacity:1; transform:none}

/* 3D modelling showcase */
.videoShowcase{display:flex; flex-direction:column; gap:28px}
.videoHero{display:grid; grid-template-columns:minmax(0,1.5fr) minmax(0,1fr); gap:20px; align-items:center; padding:18px; border-radius:18px; border:1px solid var(--faint); background:linear-gradient(120deg, rgba(124,58,237,.08), rgba(14,165,233,.08))}
.videoHero h1{margin:10px 0 10px; font-size:34px}
.videoHeroMeta{display:flex; flex-wrap:wrap; gap:10px; margin-top:16px}
.videoBadge{display:inline-flex; align-items:center; gap:8px; padding:6px 12px; border-radius:999px; font-size:13px; border:1px solid color-mix(in srgb, var(--b) 40%, transparent); background:rgba(124,58,237,.12); color:var(--text)}
.videoBadgeStack{display:flex; flex-wrap:wrap; gap:8px; align-items:center}
.videoHeroPanel{display:grid; gap:12px}
.videoHeroStat{padding:12px 14px; border-radius:14px; border:1px solid var(--faint); background:rgba(15,23,42,.28)}
.videoHeroStat .label{display:block; font-size:12px; color:var(--muted); margin-bottom:6px}
.videoGrid{display:flex; flex-direction:column; gap:18px}
.videoGridInner{display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:16px}
.videoCard{display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1.2fr); gap:16px; padding:16px; border-radius:18px; border:1px solid var(--faint); background:rgba(255,255,255,.04)}
.videoThumb{position:relative; display:block; border-radius:16px; overflow:hidden; min-height:180px}
.videoThumb img{width:100%; height:100%; object-fit:cover; display:block; transform:scale(1); transition:transform .5s ease}
.videoThumb::after{content:\"\"; position:absolute; inset:0; background:linear-gradient(180deg, rgba(15,23,42,0) 0%, rgba(15,23,42,.65) 100%)}
.videoThumb:hover img{transform:scale(1.04)}
.videoPlay{position:absolute; bottom:16px; left:16px; z-index:1; display:inline-flex; align-items:center; justify-content:center; width:44px; height:44px; border-radius:50%; background:rgba(15,23,42,.8); color:#fff; font-size:18px; border:1px solid rgba(255,255,255,.2)}
.videoCardBody{display:flex; flex-direction:column; gap:12px}
.videoCardHeader{display:flex; align-items:center; justify-content:space-between; gap:12px}
.videoCard h3{margin:0; font-size:22px}
.videoMeta{display:flex; align-items:center; justify-content:space-between; gap:10px; color:var(--muted); font-size:13px}
.textLink{color:var(--text); text-decoration:none; font-weight:600}
.textLink:hover{text-decoration:underline}
.videoEmbed{position:relative; padding-top:56.25%; border-radius:18px; overflow:hidden; border:1px solid var(--faint); box-shadow:0 20px 50px rgba(0,0,0,.25)}
.videoEmbed iframe{position:absolute; inset:0; width:100%; height:100%}
.projectBody{display:grid; grid-template-columns:minmax(0,2fr) minmax(0,1fr); gap:20px}
.projectCard{padding:18px; border-radius:18px; border:1px solid var(--faint); background:rgba(255,255,255,.04)}
.projectMeta{display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:12px; margin-top:16px}
.projectMeta .label{display:block; font-size:12px; color:var(--muted); margin-bottom:6px}
.projectSidebar{display:flex; flex-direction:column; gap:14px}
.projectCallout{padding:16px; border-radius:16px; border:1px solid var(--faint); background:rgba(15,23,42,.26)}
.projectCallout h3{margin-top:0}
.relatedGrid .sectionHeader{display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom:16px}
.relatedGrid .videoCard{grid-template-columns:1fr}

@media (max-width: 980px){
  .videoHero{grid-template-columns:1fr}
  .videoCard{grid-template-columns:1fr}
  .videoGridInner{grid-template-columns:repeat(2, minmax(0,1fr))}
  .projectBody{grid-template-columns:1fr}
}
@media (max-width: 640px){
  .videoGridInner{grid-template-columns:1fr}
  .videoMeta{flex-direction:column; align-items:flex-start}
  .projectMeta{grid-template-columns:1fr}
}

/* responsive */
@media (max-width: 980px){
  .hero .left,.hero .right{grid-column: span 12}
  .ach{grid-column: span 12; grid-template-columns:1fr}
  .ach .listCard,.ach .metricStack{grid-column:1 / -1}
  .skills{grid-column: span 12}
}
@media (max-width: 780px){
  .nav{flex-wrap:wrap}
  .pill{width:100%; overflow:auto}
  .job{grid-template-columns:1fr}
  footer{flex-direction:column; align-items:flex-start}
}

/* print */
@media print{
  header,.progress,.grain,.btn,.pill,.toast{display:none !important}
  body{background:#fff; color:#111}
  .card, .job, .listCard, .skillItem, .metric, .row, .fact{
    box-shadow:none !important;
    background:#fff !important;
    border:1px solid #ddd !important;
  }
  .grad{color:#111 !important; -webkit-text-fill-color:#111 !important}
  a{text-decoration:none}
}

@media (prefers-reduced-motion: reduce){
  *{animation:none !important; transition:none !important; scroll-behavior:auto !important}
}