:root{
    --blueprint-deep:#13283F;
    --blueprint-mid:#1B3A5C;
    --blueprint-line:rgba(140,180,220,0.16);
    --blueprint-line-strong:rgba(170,205,235,0.32);
    --paper:#F5F1E7;
    --paper-dim:#EDE7D8;
    --ink:#16222E;
    --ink-soft:#4C5C6B;
    --copper:#D98C3D;
    --copper-soft:rgba(217,140,61,0.18);
    --teal:#5FB3A6;
    --mono: 'JetBrains Mono', monospace;
    --sans: 'IBM Plex Sans', sans-serif;
    --maxw: 1080px;
  }
  *{box-sizing:border-box; margin:0; padding:0;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--blueprint-deep);
    color:var(--paper);
    font-family:var(--sans);
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
  }
  .grid-bg{
    position:fixed; inset:0; z-index:0; pointer-events:none;
    background-image:
      linear-gradient(var(--blueprint-line) 1px, transparent 1px),
      linear-gradient(90deg, var(--blueprint-line) 1px, transparent 1px);
    background-size:42px 42px;
    opacity:0.55;
  }
  .grid-bg::after{
    content:""; position:absolute; inset:0;
    background:radial-gradient(ellipse at 20% 0%, rgba(19,40,63,0) 0%, var(--blueprint-deep) 78%);
  }
  a{color:inherit; text-decoration:none;}
  .wrap{max-width:var(--maxw); margin:0 auto; padding:0 28px; position:relative; z-index:1;}

  /* ---------- NAV ---------- */
  header{
    position:sticky; top:0; z-index:50;
    background:rgba(19,40,63,0.86);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--blueprint-line-strong);
  }
  nav{display:flex; align-items:center; justify-content:space-between; padding:18px 28px; max-width:var(--maxw); margin:0 auto;}
  .brand{font-family:var(--mono); font-weight:700; font-size:14px; letter-spacing:0.04em; color:var(--paper); display:flex; gap:8px; align-items:center;}
  .brand .dot{width:8px; height:8px; border-radius:50%; background:var(--teal); box-shadow:0 0 0 4px rgba(95,179,166,0.18);}
  .navlinks{display:flex; gap:30px; font-family:var(--mono); font-size:12.5px; letter-spacing:0.05em; text-transform:uppercase;}
  .navlinks a{color:rgba(245,241,231,0.65); transition:color .2s;}
  .navlinks a:hover{color:var(--copper);}
  .navtoggle{display:none; flex-direction:column; gap:5px; cursor:pointer; background:none; border:none;}
  .navtoggle span{width:22px; height:2px; background:var(--paper);}

  /* ---------- HERO ---------- */
  .hero{padding:84px 0 70px; position:relative;}
  .hero-grid{display:grid; grid-template-columns:1.15fr 0.85fr; gap:48px; align-items:center;}
  .eyebrow{
    font-family:var(--mono); font-size:12.5px; letter-spacing:0.12em; text-transform:uppercase;
    color:var(--copper); display:flex; align-items:center; gap:10px; margin-bottom:18px;
  }
  .eyebrow::before{content:""; width:22px; height:1px; background:var(--copper);}
  h1.name{
    font-family:var(--mono); font-weight:700; font-size:clamp(34px,5vw,54px);
    line-height:1.05; letter-spacing:-0.01em; color:var(--paper); margin-bottom:14px;
  }
  .role{font-size:19px; color:rgba(245,241,231,0.8); margin-bottom:22px; font-weight:500;}
  .role .sep{color:var(--copper); margin:0 8px;}
  .summary{max-width:520px; color:rgba(245,241,231,0.72); font-size:15.5px; margin-bottom:28px;}
  .chips{display:flex; flex-wrap:wrap; gap:10px; margin-bottom:30px;}
  .chip{
    font-family:var(--mono); font-size:12px; letter-spacing:0.02em;
    border:1px solid var(--blueprint-line-strong); border-radius:3px;
    padding:6px 11px; color:rgba(245,241,231,0.75); display:flex; align-items:center; gap:7px;
  }
  .chip svg{width:13px; height:13px; opacity:0.7;}
  .cta-row{display:flex; gap:14px; flex-wrap:wrap;}
  .btn{
    font-family:var(--mono); font-size:13px; letter-spacing:0.03em; font-weight:600;
    padding:13px 22px; border-radius:3px; display:inline-flex; align-items:center; gap:9px;
    transition:transform .18s ease, box-shadow .18s ease;
  }
  .btn-primary{background:var(--copper); color:var(--blueprint-deep);}
  .btn-primary:hover{transform:translateY(-2px); box-shadow:0 10px 24px -8px rgba(217,140,61,0.5);}
  .btn-ghost{border:1px solid var(--blueprint-line-strong); color:var(--paper);}
  .btn-ghost:hover{border-color:var(--copper); color:var(--copper); transform:translateY(-2px);}

  /* schematic illustration */
  .schematic{position:relative; aspect-ratio:1/1; max-width:380px; margin:0 auto;}
  .schematic svg{width:100%; height:100%;}
  .trace{fill:none; stroke:var(--blueprint-line-strong); stroke-width:1.4;}
  .trace-pulse{
    fill:none; stroke:var(--teal); stroke-width:1.6;
    stroke-dasharray:6 220; stroke-dashoffset:0;
    animation:flow 5.5s linear infinite;
    filter:drop-shadow(0 0 4px rgba(95,179,166,0.7));
  }
  .trace-pulse.copper{stroke:var(--copper); animation-duration:7s; animation-delay:0.6s; filter:drop-shadow(0 0 4px rgba(217,140,61,0.7));}
  @keyframes flow{ to{ stroke-dashoffset:-460; } }
  .node{fill:var(--blueprint-deep); stroke:var(--blueprint-line-strong); stroke-width:1.4;}
  .node-live{fill:var(--blueprint-deep); stroke:var(--teal); stroke-width:1.6;}
  .label-tag{font-family:var(--mono); font-size:8px; fill:rgba(245,241,231,0.45); letter-spacing:0.05em;}

  /* ---------- SECTION SHELL ---------- */
  section{padding:64px 0;}
  .section-head{display:flex; align-items:baseline; gap:16px; margin-bottom:34px;}
  .section-tag{font-family:var(--mono); font-size:12px; letter-spacing:0.12em; text-transform:uppercase; color:var(--copper); white-space:nowrap;}
  .section-rule{flex:1; height:1px; background:var(--blueprint-line-strong);}
  h2.section-title{font-family:var(--mono); font-size:26px; font-weight:700; color:var(--paper);}

  /* ---------- STACK ---------- */
  .stack-grid{display:grid; grid-template-columns:repeat(3, 1fr); gap:1px; background:var(--blueprint-line-strong); border:1px solid var(--blueprint-line-strong);}
  .stack-card{background:var(--blueprint-deep); padding:22px 20px;}
  .stack-card .k{font-family:var(--mono); font-size:11px; letter-spacing:0.08em; text-transform:uppercase; color:var(--teal); margin-bottom:10px; display:block;}
  .stack-card .v{font-size:14.5px; color:rgba(245,241,231,0.85); line-height:1.7;}

  /* ---------- PROJECTS ---------- */
  .projects{display:grid; grid-template-columns:repeat(2,1fr); gap:22px;}
  .pcard{
    position:relative; background:var(--paper); color:var(--ink); border-radius:4px;
    padding:26px 24px 22px; transition:transform .22s ease, box-shadow .22s ease;
  }
  .pcard:hover{transform:translateY(-4px); box-shadow:0 18px 34px -14px rgba(0,0,0,0.45);}
  .pcard::before, .pcard::after, .pcard .br1, .pcard .br2{
    content:""; position:absolute; width:14px; height:14px; border-color:var(--copper); opacity:0; transition:opacity .22s;
  }
  .pcard:hover::before,.pcard:hover::after,.pcard:hover .br1,.pcard:hover .br2{opacity:1;}
  .pcard::before{top:6px; left:6px; border-top:2px solid; border-left:2px solid;}
  .pcard::after{bottom:6px; right:6px; border-bottom:2px solid; border-right:2px solid;}
  .pcard .br1{top:6px; right:6px; border-top:2px solid; border-right:2px solid;}
  .pcard .br2{bottom:6px; left:6px; border-bottom:2px solid; border-left:2px solid;}
  .pcard .ptitle{font-family:var(--mono); font-weight:700; font-size:16.5px; margin-bottom:6px; padding-right:6px;}
  .pcard .pstack{font-family:var(--mono); font-size:11px; color:var(--ink-soft); letter-spacing:0.02em; margin-bottom:14px; text-transform:uppercase;}
  .pcard ul{list-style:none; display:flex; flex-direction:column; gap:7px;}
  .pcard li{font-size:13.8px; color:var(--ink-soft); padding-left:16px; position:relative;}
  .pcard li::before{content:"›"; position:absolute; left:0; color:var(--copper); font-weight:700;}
  .pcard .ptag{display:inline-block; font-family:var(--mono); font-size:10px; letter-spacing:0.05em; background:var(--copper-soft); color:#8A5421; padding:3px 8px; border-radius:2px; margin-bottom:12px;}
  .pcard-link{
    display:inline-flex; align-items:center; gap:6px; margin-top:16px;
    font-family:var(--mono); font-size:12.5px; font-weight:600; letter-spacing:0.02em;
    color:var(--ink); border-bottom:1px solid var(--ink-soft); padding-bottom:2px;
    transition:color .18s ease, border-color .18s ease;
  }
  .pcard-link:hover{color:#8A5421; border-color:#8A5421;}

  /* ---------- TIMELINE (experience + education) ---------- */
  .timeline{position:relative; padding-left:26px;}
  .timeline::before{content:""; position:absolute; left:4px; top:6px; bottom:6px; width:1px; background:var(--blueprint-line-strong);}
  .titem{position:relative; padding-bottom:32px;}
  .titem:last-child{padding-bottom:0;}
  .titem::before{content:""; position:absolute; left:-26px; top:4px; width:9px; height:9px; border-radius:50%; background:var(--blueprint-deep); border:2px solid var(--teal);}
  .titem .row{display:flex; justify-content:space-between; flex-wrap:wrap; gap:8px; margin-bottom:6px;}
  .titem .role-t{font-family:var(--mono); font-weight:600; font-size:15px; color:var(--paper);}
  .titem .org{color:var(--copper); font-weight:500;}
  .titem .meta{font-family:var(--mono); font-size:11.5px; color:rgba(245,241,231,0.45);}
  .titem p{color:rgba(245,241,231,0.68); font-size:14px; max-width:640px;}

  /* ---------- ACHIEVEMENTS ---------- */
  .achv-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:22px;}
  .achv-card{
    background:var(--paper); color:var(--ink); border-radius:4px; overflow:hidden;
    transition:transform .22s ease, box-shadow .22s ease;
  }
  .achv-card:hover{transform:translateY(-4px); box-shadow:0 18px 34px -14px rgba(0,0,0,0.45);}
  .achv-img{width:100%; aspect-ratio:16/10; overflow:hidden; background:var(--blueprint-mid);}
  .achv-img img{width:100%; height:100%; object-fit:cover; display:block;}
  .achv-body{padding:20px 22px 22px;}
  .achv-body .ptitle{font-family:var(--mono); font-weight:700; font-size:16px; margin-bottom:8px;}
  .achv-body p{font-size:13.8px; color:var(--ink-soft); line-height:1.65;}

  /* ---------- CERTIFICATES ---------- */
  .cert-list{display:flex; flex-direction:column; border:1px solid var(--blueprint-line-strong); border-radius:4px; overflow:hidden;}
  .cert-row{
    display:grid; grid-template-columns:1fr 230px 90px; align-items:center; gap:18px;
    padding:15px 22px; border-bottom:1px solid var(--blueprint-line);
    background:var(--blueprint-deep); transition:background .18s ease;
  }
  .cert-row:last-child{border-bottom:none;}
  .cert-row:hover{background:var(--blueprint-mid);}
  .cert-row:hover .cert-view{color:var(--teal);}
  .cert-row:hover .cert-name{color:var(--paper);}
  .cert-name{font-family:var(--mono); font-size:14px; font-weight:500; color:rgba(245,241,231,0.9);}
  .cert-issuer{font-family:var(--mono); font-size:11.5px; letter-spacing:0.04em; text-transform:uppercase; color:var(--copper);}
  .cert-view{font-family:var(--mono); font-size:12px; color:rgba(245,241,231,0.45); text-align:right; transition:color .18s ease;}

  /* ---------- CONTACT ---------- */
  .contact-box{
    background:var(--paper); color:var(--ink); border-radius:6px; padding:46px 40px;
    display:flex; justify-content:space-between; align-items:center; gap:30px; flex-wrap:wrap;
  }
  .contact-box h3{font-family:var(--mono); font-size:24px; font-weight:700; margin-bottom:8px;}
  .contact-box p{color:var(--ink-soft); max-width:420px; font-size:14.5px;}
  .contact-box .cta-row .btn-primary{background:var(--blueprint-deep); color:var(--paper);}
  .contact-box .cta-row .btn-ghost{border-color:var(--ink-soft); color:var(--ink);}
  .contact-box .cta-row .btn-ghost:hover{border-color:var(--copper); color:#8A5421;}

  footer{padding:30px 0 50px; text-align:center; font-family:var(--mono); font-size:11.5px; color:rgba(245,241,231,0.35); letter-spacing:0.04em;}

  .reveal{opacity:0; transform:translateY(16px); transition:opacity .6s ease, transform .6s ease;}
  .reveal.in{opacity:1; transform:translateY(0);}

  @media (max-width:860px){
    .hero-grid{grid-template-columns:1fr;}
    .schematic{display:none;}
    .stack-grid{grid-template-columns:repeat(2,1fr);}
    .projects{grid-template-columns:1fr;}
    .achv-grid{grid-template-columns:1fr;}
  }
  @media (max-width:640px){
    .navlinks{display:none;}
    .navtoggle{display:flex;}
    .navlinks.open{
      display:flex; flex-direction:column; position:absolute; top:64px; left:0; right:0;
      background:var(--blueprint-deep); padding:18px 28px; gap:16px; border-bottom:1px solid var(--blueprint-line-strong);
    }
    .stack-grid{grid-template-columns:1fr 1fr;}
    .contact-box{padding:32px 24px;}
    .contact-box{flex-direction:column; align-items:flex-start;}
    .cert-row{grid-template-columns:1fr; gap:4px; padding:14px 18px;}
    .cert-view{text-align:left;}
  }
  @media (prefers-reduced-motion: reduce){
    html{scroll-behavior:auto;}
    .trace-pulse{animation:none;}
    .reveal{transition:none; opacity:1; transform:none;}
  }