:root{
    --bg:#0A0F16;
    --surface:#0F1720;
    --surface-2:#141E29;
    --border:rgba(255,255,255,0.08);
    --text:#E8EDF2;
    --text-muted:#7C8798;
    --cyan:#22D3EE;
    --green:#34D399;
    --purple:#A78BFA;
    --grad: linear-gradient(90deg, var(--cyan), var(--green) 55%, var(--purple));
  }

  *{ margin:0; padding:0; box-sizing:border-box; }

  html{ scroll-behavior:smooth; }

  body{
    background:var(--bg);
    color:var(--text);
    font-family:'Inter', sans-serif;
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
  }

  h1,h2,h3{
    font-family:'Space Grotesk', sans-serif;
    font-weight:600;
    letter-spacing:-0.01em;
  }

  .mono{
    font-family:'JetBrains Mono', monospace;
    font-size:0.78rem;
    letter-spacing:0.04em;
    text-transform:uppercase;
    color:var(--text-muted);
  }

  a{ color:inherit; text-decoration:none; }

  ::selection{ background:var(--purple); color:#0A0F16; }

  .container{
    max-width:1080px;
    margin:0 auto;
    padding:0 32px;
  }

  /* ---------- circuit divider (signature element) ---------- */
  .circuit{
    display:flex;
    align-items:center;
    gap:8px;
    margin:0 auto;
    width:fit-content;
  }
  .circuit .line{
    height:1px;
    width:64px;
    background:linear-gradient(90deg, transparent, var(--border));
  }
  .circuit .line.right{ background:linear-gradient(90deg, var(--border), transparent); }
  .circuit .node{
    width:6px; height:6px; border-radius:1px;
    background:var(--green);
    box-shadow:0 0 8px rgba(52,211,153,0.5);
    transform:rotate(45deg);
  }

  /* ---------- header ---------- */
  header{
    position:sticky; top:0; z-index:50;
    background:rgba(10,15,22,0.85);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--border);
  }
  .nav{
    display:flex; 
    align-items:center; 
    justify-content:space-between;
    padding:18px 15px;
  }
  .brand{ display:flex; align-items:center; gap:10px; }
  .brand img{ height:30px; width:auto; display:block; }
  .brand span{ font-family:'Space Grotesk'; font-weight:600; font-size:1rem; }
  .navlinks{ display:flex; gap:32px; }
  .navlinks a{
    font-family:'JetBrains Mono', monospace;
    font-size:0.82rem;
    color:var(--text-muted);
    transition:color .2s ease;
  }
  .navlinks a:hover{ color:var(--text); }
  .navlinks a:focus-visible, .brand:focus-visible{
    outline:1px solid var(--cyan); outline-offset:4px;
  }
  .navtoggle { display:none; background:none; border:none; color:var(--text); font-size: 3rem; cursor: pointer; }  
   

  /* ---------- hero ---------- */
  .hero{
    padding:120px 0 100px;
    position:relative;
    overflow:hidden;
  }
  .hero::before{
    content:'';
    position:absolute;
    top:-200px; right:-200px;
    width:520px; height:520px;
    background:radial-gradient(circle, rgba(34,211,238,0.10), transparent 70%);
    pointer-events:none;
  }
  .hero-grid{
    display:grid;
    grid-template-columns:1.15fr 0.85fr;
    gap:56px;
    align-items:center;
  }
  .eyebrow{
    display:flex; align-items:center; gap:10px;
    margin-bottom:20px;
  }
  .eyebrow .dot{
    width:7px; height:7px; border-radius:50%;
    background:var(--green);
    box-shadow:0 0 10px rgba(52,211,153,0.7);
    animation:pulse 2.4s ease-in-out infinite;
  }
  @keyframes pulse{
    0%,100%{ opacity:1; } 50%{ opacity:0.35; }
  }
  .hero h1{
    font-size:clamp(2.4rem, 5vw, 3.6rem);
    line-height:1.08;
    margin-bottom:20px;
  }
  .hero h1 .grad{
    background:var(--grad);
    -webkit-background-clip:text;
    background-clip:text;
    color:transparent;
  }
  .hero p.lead{
    color:var(--text-muted);
    font-size:1.05rem;
    max-width:480px;
    margin-bottom:32px;
  }
  .cta-row{ display:flex; gap:16px; flex-wrap:wrap; }
  .btn{
    font-family:'JetBrains Mono', monospace;
    font-size:0.85rem;
    padding:13px 24px;
    border-radius:2px;
    border:1px solid var(--border);
    transition:border-color .2s ease, transform .2s ease, background .2s ease;
    display:inline-flex; align-items:center; gap:8px;
  }
  .btn-primary{
    background:var(--text);
    color:var(--bg);
    border-color:var(--text);
    font-weight:500;
  }
  .btn-primary:hover{ transform:translateY(-2px); }
  .btn-ghost:hover{ border-color:var(--cyan); color:var(--cyan); }

  /* terminal card */
  .terminal{
    background:var(--surface);
    border:1px solid var(--border);
    border-radius:8px;
    overflow:hidden;
    box-shadow:0 20px 60px rgba(0,0,0,0.35);
  }
  .terminal-bar{
    display:flex; gap:6px;
    padding:12px 14px;
    border-bottom:1px solid var(--border);
    background:var(--surface-2);
  }
  .terminal-bar span{
    width:9px; height:9px; border-radius:50%;
    background:rgba(255,255,255,0.15);
  }
  .terminal-body{
    padding:22px 20px;
    font-family:'JetBrains Mono', monospace;
    font-size:0.82rem;
    color:var(--text-muted);
  }
  .terminal-body .l{ margin-bottom:10px; }
  .terminal-body .kw{ color:var(--purple); }
  .terminal-body .fn{ color:var(--cyan); }
  .terminal-body .str{ color:var(--green); }
  .terminal-body .cursor{
    display:inline-block; width:7px; height:14px;
    background:var(--green); vertical-align:middle;
    animation:blink 1.1s step-end infinite;
  }
  @keyframes blink{ 50%{ opacity:0; } }

  /* ---------- section shell ---------- */
  section{ padding:90px 0; border-top:1px solid var(--border); }
  .section-head{ margin-bottom:48px; }
  .section-head .mono{ margin-bottom:10px; display:block; }
  .section-head h2{ font-size:clamp(1.6rem, 3vw, 2.1rem); }

  /* ---------- about ---------- */
  .about-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:56px;
  }
  .about-grid p{ color:var(--text-muted); margin-bottom:16px; max-width:480px; }
  .stat-list{ display:flex; flex-direction:column; gap:22px; }
  .stat{ display:flex; justify-content:space-between; border-bottom:1px solid var(--border); padding-bottom:14px; }
  .stat .label{ color:var(--text-muted); font-size:0.92rem; }
  .stat .value{ font-family:'JetBrains Mono', monospace; font-size:0.88rem; color:var(--text); }

  /* ---------- projects ---------- */
  .projects{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
  .card{
    background:var(--surface);
    border:1px solid var(--border);
    border-radius:8px;
    padding:28px 24px;
    transition:border-color .25s ease, transform .25s ease;
  }
  .card:hover{ border-color:rgba(255,255,255,0.18); transform:translateY(-4px); }
  .card .tag{
    display:inline-block;
    font-family:'JetBrains Mono', monospace;
    font-size:0.7rem;
    color:var(--cyan);
    border:1px solid rgba(34,211,238,0.3);
    padding:3px 9px;
    border-radius:20px;
    margin-bottom:16px;
  }
  .card h3{ font-size:1.1rem; margin-bottom:10px; }
  .card p{ color:var(--text-muted); font-size:0.92rem; margin-bottom:18px; }
  .card .stack{ display:flex; flex-wrap:wrap; gap:8px; }
  .card .stack span{
    font-family:'JetBrains Mono', monospace;
    font-size:0.7rem;
    color:var(--text-muted);
    background:var(--surface-2);
    padding:4px 8px;
    border-radius:4px;
  }
  .card .link{
    display:inline-flex; align-items:center; gap:6px;
    margin-top:18px;
    font-family:'JetBrains Mono', monospace;
    font-size:0.78rem;
    color:var(--text);
    border-bottom:1px solid transparent;
  }
  .card .link:hover{ border-color:var(--green); color:var(--green); }

  /* ---------- stack ---------- */
  .stackgrid{
    display:grid;
    grid-template-columns:repeat(5,1fr);
    gap:1px;
    background:var(--border);
    border:1px solid var(--border);
    border-radius:8px;
    overflow:hidden;
  }
  .stackitem{
    background:var(--surface);
    padding:26px 20px;
    text-align:center;
  }
  .stackitem .name{ font-family:'Space Grotesk'; font-weight:600; font-size:0.95rem; margin-bottom:4px; }
  .stackitem .role{ font-family:'JetBrains Mono', monospace; font-size:0.68rem; color:var(--text-muted); text-transform:uppercase; letter-spacing:0.05em; }

  /* ---------- contact ---------- */
  .contact{ text-align:center; }
  .contact h2{ font-size:clamp(1.8rem,4vw,2.6rem); margin-bottom:18px; }
  .contact p{ color:var(--text-muted); max-width:460px; margin:0 auto 36px; }
  .contact .cta-row{ justify-content:center; }
  .socials{ display:flex; justify-content:center; gap:28px; margin-top:44px; }
  .socials a{
    font-family:'JetBrains Mono', monospace;
    font-size:0.8rem;
    color:var(--text-muted);
    border-bottom:1px solid transparent;
    padding-bottom:2px;
  }
  .socials a:hover{ color:var(--text); border-color:var(--green); }

  footer{
    border-top:1px solid var(--border);
    padding:28px 0;
    text-align:center;
  }
  footer p{ font-family:'JetBrains Mono', monospace; font-size:0.74rem; color:var(--text-muted); }

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

  @media (prefers-reduced-motion: reduce){
    html{ scroll-behavior:auto; }
    .reveal{ opacity:1; transform:none; transition:none; }
    .eyebrow .dot, .terminal-body .cursor{ animation:none; }
  }

  /* ---------- responsive ---------- */
  @media (max-width:860px){
    .hero-grid{ grid-template-columns:1fr; }
    .about-grid{ grid-template-columns:1fr; }
    .projects{ grid-template-columns:1fr; }
    .stackgrid{ grid-template-columns:repeat(2,1fr);}
  }
  @media (max-width:640px){
    .navlinks{
      position:fixed; top:20px; left:0; right:0; height: 70vh;
      background: var(--text); border-bottom:1px solid var(--border);
      flex-direction:column; padding:20px 32px; gap:18px; display: none;
    }
    .navlinks a:first-child {
      margin-top: 100px;
    }
    .navlinks a {
      color: #000; font-size: 20px; text-align: center; padding: 15px 0; 
    }
    .navlinks a:hover {
      color: var(--green);
    }

    .navlinks.open{ display:flex; }    
    .navtoggle{ display:block; z-index: 2; }          
    .no-scroll { overflow: hidden;}
    .hero{ padding:80px 0 60px; }
    section{ padding:64px 0; }
  }