:root{
    --bg-0:#0b0d13;
    --bg-1:#12151d;
    --bg-2:#181c26;
    --line:rgba(233,238,246,0.08);
    --line-strong:rgba(233,238,246,0.16);
    --text-0:#eef1f7;
    --text-1:#a4acbd;
    --text-2:#6c7488;

    --r:#d97757;   /* clay / burnt sienna  */
    --g:#5fa88f;   /* deep sage teal       */
    --b:#6b93b0;   /* slate blue           */
    --v:#8b7bb8;   /* dusty plum violet    */
    --amber:#c9a35e; /* muted ochre        */

    --radius:8px;
    --display:'Space Grotesk',sans-serif;
    --mono:'JetBrains Mono',monospace;
    --body:'Inter',sans-serif;
  }
  *{box-sizing:border-box; margin:0; padding:0;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--bg-0);
    color:var(--text-0);
    font-family:var(--body);
    line-height:1.65;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  body::before{
    content:'';
    position:fixed; inset:0;
    background:
      radial-gradient(680px 420px at 12% -6%, rgba(217,119,87,0.10), transparent 60%),
      radial-gradient(680px 420px at 88% 4%, rgba(107,147,176,0.10), transparent 60%),
      radial-gradient(900px 500px at 50% 110%, rgba(95,168,143,0.06), transparent 60%);
    pointer-events:none; z-index:0;
  }
  a{color:inherit; text-decoration:none;}
  ::selection{background:var(--v); color:#0b0d13;}
  .wrap{max-width:1080px; margin:0 auto; padding:0 28px; position:relative; z-index:1;}
  h1,h2,h3{font-family:var(--display); font-weight:600; letter-spacing:-0.01em;}

  .grad-text{
    background:linear-gradient(90deg,var(--r),var(--v) 45%,var(--b));
    -webkit-background-clip:text; background-clip:text; color:transparent;
  }

  /* ---------- terminal-style nav ---------- */
  nav{
    position:sticky; top:0; z-index:50;
    background:rgba(11,13,19,0.82);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
  }
  .nav-inner{
    max-width:1080px; margin:0 auto; padding:16px 28px;
    display:flex; align-items:center; justify-content:space-between; gap:20px; flex-wrap:wrap;
  }
  .prompt{
    font-family:var(--mono); font-size:14.5px; color:var(--text-1);
    display:flex; align-items:center; gap:8px;
  }
  .prompt .sym{color:var(--g); font-weight:700;}
  .prompt .path{color:var(--b);}
  .cursor{
    width:8px; height:16px; background:var(--r);
    animation:blink 1s steps(1) infinite;
    display:inline-block;
  }
  @keyframes blink{ 50%{ opacity:0; } }
  .nav-links{display:flex; gap:20px; align-items:center;}
  .nav-links a:not(.btn){
    font-family:var(--mono); font-size:13px; color:var(--text-1);
    position:relative; padding-bottom:3px;
  }
  .nav-links a:not(.btn)::after{
    content:''; position:absolute; left:0; bottom:0; width:0; height:2px;
    background:linear-gradient(90deg,var(--r),var(--b));
    transition:width 0.25s;
  }
  .nav-links a:not(.btn):hover{color:var(--text-0);}
  .nav-links a:not(.btn):hover::after{width:100%;}
  .btn{
    display:inline-flex; align-items:center; gap:8px;
    font-family:var(--mono); font-size:13px; font-weight:500;
    padding:10px 20px;
    border-radius:var(--radius);
    transition:all 0.2s;
    white-space:nowrap;
    border:1px solid var(--line-strong);
  }
  .btn-primary{
    background:linear-gradient(90deg,var(--r),var(--v) 55%,var(--b));
    color:#0b0d13; font-weight:700; border:none;
  }
  .btn-primary:hover{filter:brightness(1.12); box-shadow:0 6px 26px rgba(139,123,184,0.35); transform:translateY(-1px);}
  .btn-ghost{color:var(--text-0);}
  .btn-ghost:hover{border-color:var(--b); color:var(--b);}
  @media(max-width:840px){ .nav-links a:not(.btn){display:none;} }

  /* ---------- hero ---------- */
  .hero{padding:100px 0 70px; text-align:center;}
  .avatar-wrap{
    position:relative; width:280px; height:280px; margin: 0 auto 30px;
  }
  .avatar-ring{
    position:absolute; inset:0; border-radius:50%;
    background:conic-gradient(from 0deg, var(--r), var(--v), var(--b), var(--g), var(--r));
    padding:4px;
  }
  @keyframes spin{ to{ transform:rotate(360deg); } }
  .avatar-inner{
    width:100%; height:100%; border-radius:50%;
    background:var(--bg-1);
    display:flex; align-items:center; justify-content:center;
    position:relative; z-index:1; overflow:hidden;
  }
  .avatar-photo{
    width:100%; height:100%; object-fit:cover; object-position:center center;
    border-radius:50%; display:block;
  }
  .avatar-tag{
    position:absolute; bottom:-6px; left:50%; transform:translateX(-50%);
    font-family:var(--mono); font-size:10.5px; color:var(--text-2);
    background:var(--bg-0); padding:3px 10px; border:1px solid var(--line-strong); border-radius:20px;
    white-space:nowrap; z-index:2;
  }
  .hero h1{font-size:clamp(34px,5.4vw,52px); margin-bottom:14px;}
  .role-line{
    font-family:var(--mono); font-size:15.5px; color:var(--text-1); margin-bottom:26px;
  }
  .role-line .sep{color:var(--text-2); margin:0 8px;}
  .role-line span:nth-of-type(1){color:var(--r);}
  .role-line span:nth-of-type(2){color:var(--v);}
  .role-line span:nth-of-type(3){color:var(--b);}
  .hero p.lead{
    color:var(--text-1); font-size:16px; max-width:60ch; margin:0 auto 34px;
  }
  .social-row{display:flex; gap:18px; justify-content:center; margin-bottom:34px;}
  .social-row a{
    width:42px; height:42px; border-radius:50%;
    border:1px solid var(--line-strong);
    display:flex; align-items:center; justify-content:center;
    color:var(--text-1); transition:all 0.2s;
  }
  .social-row a:hover{border-color:var(--v); color:var(--v); transform:translateY(-2px);}
  .social-row svg{width:19px; height:19px;}
  .hero-actions{display:flex; gap:14px; justify-content:center; flex-wrap:wrap;}

  /* ---------- stats ---------- */
  .stats{border-top:1px solid var(--line); border-bottom:1px solid var(--line); padding:34px 0; margin-top:70px;}
  .stats-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:24px; text-align:center;}
  @media(max-width:760px){ .stats-grid{grid-template-columns:repeat(2,1fr);} }
  .stat{display:flex; flex-direction:column; align-items:center; gap:2px;}
  .stat b{font-family:var(--display); font-size:19px; font-weight:700; display:block; margin-bottom:6px;}
  .stat b small{font-size:13px; font-weight:500; color:var(--text-2); font-family:var(--mono);}
  .stat:nth-of-type(1) b{color:var(--r);}
  .stat:nth-of-type(2) b{color:var(--g);}
  .stat:nth-of-type(3) b{color:var(--b);}
  .stat:nth-of-type(4) b{color:var(--v);}
  .stat span{font-size:12px; color:var(--text-2); font-family:var(--mono); max-width:22ch;}

  /* ---------- section shell ---------- */
  section{padding:90px 0;}
  .sec-head{margin-bottom:44px; max-width:66ch;}
  .cmd{
    font-family:var(--mono); font-size:13px; color:var(--text-2);
    display:flex; align-items:center; gap:8px; margin-bottom:16px;
  }
  .cmd .p1{color:var(--g);}
  .cmd .p2{color:var(--text-1);}
  .sec-head h2{font-size:clamp(26px,3.4vw,34px); margin-bottom:12px;}
  .sec-head p{color:var(--text-1); font-size:15.5px;}

  /* about */
  .about-grid{display:grid; grid-template-columns:1.4fr 1fr; gap:50px;}
  @media(max-width:820px){ .about-grid{grid-template-columns:1fr;} }
  .about-grid p{color:var(--text-1); font-size:15.5px; margin-bottom:16px;}
  .chip-cloud{display:flex; flex-wrap:wrap; gap:9px;}
  .chip{
    font-family:var(--mono); font-size:12px; padding:7px 13px;
    border-radius:20px; color:var(--text-0);
    border:1px solid transparent;
  }
  .chip.c0{background:rgba(217,119,87,0.12); border-color:rgba(217,119,87,0.35); color:var(--r);}
  .chip.c1{background:rgba(95,168,143,0.12); border-color:rgba(95,168,143,0.35); color:var(--g);}
  .chip.c2{background:rgba(107,147,176,0.12); border-color:rgba(107,147,176,0.35); color:var(--b);}
  .chip.c3{background:rgba(139,123,184,0.12); border-color:rgba(139,123,184,0.35); color:var(--v);}

  /* experience */
  .exp-card{
    border:1px solid var(--line); border-radius:var(--radius);
    padding:30px 32px; background:var(--bg-1); position:relative; overflow:hidden;
  }
  .exp-card::before{
    content:''; position:absolute; top:0; left:0; width:4px; height:100%;
    background:linear-gradient(180deg,var(--r),var(--b));
  }
  .exp-top{display:flex; align-items:center; gap:16px; margin-bottom:16px; flex-wrap:wrap;}
  .exp-logo{
    width:52px; height:52px; border-radius:12px; object-fit:cover;
    border:1px solid var(--line-strong); background:#fff; flex-shrink:0;
  }
  .exp-photo{
    width:52px; height:52px; border-radius:50%; object-fit:cover;
    border:2px solid var(--line-strong); flex-shrink:0; margin-left:auto;
  }
  .exp-head{flex:1 1 auto; display:flex; flex-direction:column; gap:6px; min-width:200px;}
  .exp-head h3{font-size:19px;}
  .exp-head .period{font-family:var(--mono); font-size:12.5px; color:var(--v);}
  .exp-card ul{list-style:none; display:flex; flex-direction:column; gap:10px;}
  .exp-card li{color:var(--text-1); font-size:14.5px; padding-left:22px; position:relative;}
  .exp-card li::before{content:'→'; position:absolute; left:0; color:var(--g);}

  .stack-row{display:flex; flex-wrap:wrap; gap:8px; margin-top:6px;}
  .stack-tag{
    font-family:var(--mono); font-size:11.5px; color:var(--text-1);
    border:1px solid var(--line-strong); padding:5px 10px; border-radius:6px;
  }

  /* projects grid */
  .proj-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:22px; align-items:stretch;}
  @media(max-width:760px){ .proj-grid{grid-template-columns:1fr;} }
  .proj-card{
    position:relative; border:1px solid var(--line); border-radius:var(--radius);
    background:var(--bg-1); padding:0 26px 24px;
    transition:border-color 0.25s, transform 0.25s;
    border-top:3px solid var(--accent, var(--v));
    display:flex; flex-direction:column; height:100%;
    overflow:hidden;
  }
  .proj-card:hover{transform:translateY(-3px); border-color:var(--line-strong); border-top-color:var(--accent, var(--v));}
  .proj-thumb-wrap{
    width:100%; height:190px; margin:0 0 18px;
    display:flex; align-items:center; justify-content:center;
    background:var(--bg-2);
    border-bottom:1px solid var(--line);
    flex-shrink:0;
  }
  .proj-thumb{
    max-width:100%; max-height:100%; width:auto; height:auto;
    object-fit:contain; display:block;
  }
  .proj-thumb-placeholder{
    font-family:var(--mono); font-size:11px; letter-spacing:0.08em; color:var(--text-2);
    background:
      repeating-linear-gradient(135deg, transparent 0 12px, var(--line) 12px 13px),
      var(--bg-2);
  }
  .proj-id{
    font-family:var(--mono); font-size:11px; color:var(--text-2); letter-spacing:0.06em;
    display:flex; justify-content:space-between; margin-bottom:14px;
  }
  .proj-id .conf{color:var(--accent,var(--v)); font-weight:600;}
  .proj-card h3{font-size:17.5px; margin-bottom:10px; line-height:1.3;}
  .proj-card p{color:var(--text-1); font-size:13.8px; margin-bottom:16px;}
  .proj-card .stack-row{margin-bottom:16px;}
  .proj-link{
    font-family:var(--mono); font-size:12px; color:var(--accent,var(--v));
    display:inline-flex; align-items:center; gap:6px; font-weight:600;
    margin-top:auto; padding-top:2px;
  }
  .proj-link::after{content:'↗'; transition:transform 0.2s;}
  .proj-card:hover .proj-link::after{transform:translate(2px,-2px);}

  /* skills */
  .skills-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:26px;}
  @media(max-width:820px){ .skills-grid{grid-template-columns:1fr 1fr;} }
  @media(max-width:560px){ .skills-grid{grid-template-columns:1fr;} }
  .skill-block h4{
    font-family:var(--mono); font-size:12px; letter-spacing:0.08em; text-transform:uppercase;
    margin-bottom:14px; color:var(--accent,var(--v));
  }

  /* achievement */
  .ach-card{
    border:1px solid var(--line); border-radius:var(--radius);
    background:linear-gradient(120deg, var(--bg-1), var(--bg-2));
    padding:30px 32px; display:flex; gap:26px; align-items:flex-start; flex-wrap:wrap;
  }
  .ach-badge{
    font-family:var(--mono); font-size:24px; font-weight:700;
    border-radius:50%;
    width:78px; height:78px; display:flex; align-items:center; justify-content:center;
    flex-shrink:0; text-align:center; line-height:1.1;
    background:conic-gradient(from 120deg,var(--amber),var(--r),var(--v));
    color:#0b0d13;
  }
  .ach-badge small{display:block; font-size:9px; font-weight:600;}
  .ach-card h3{font-size:17px; margin-bottom:6px;}
  .ach-card p{color:var(--text-1); font-size:14px; max-width:60ch;}
  .ach-card .period{font-family:var(--mono); font-size:11.5px; color:var(--text-2); margin-top:8px; display:block;}

  /* education */
  .edu-card{
    border:1px solid var(--line); border-radius:var(--radius); background:var(--bg-1);
    padding:30px 32px; margin-bottom:24px;
  }
  .edu-card .period{font-family:var(--mono); color:var(--b); font-size:12.5px;}
  .edu-card h3{font-size:18px; margin:6px 0 18px;}
  .coursework-group{margin-bottom:14px;}
  .coursework-group b{font-family:var(--mono); font-size:11.5px; color:var(--text-2); text-transform:uppercase; letter-spacing:0.05em;}
  .coursework-group .chip-cloud{margin-top:10px;}

  .cert-grid{display:grid; grid-template-columns:1fr 1fr; gap:24px;}
  @media(max-width:700px){ .cert-grid{grid-template-columns:1fr;} }
  .cert-list{list-style:none; display:flex; flex-direction:column; gap:6px;}
  .cert-list li{font-size:14.5px; color:var(--text-1); position:relative;}
  .cert-list li a{
    display:flex; align-items:center; gap:6px; padding:8px 10px; margin-left:-10px;
    border-radius:6px; color:var(--text-1); transition:background 0.2s, color 0.2s;
  }
  .cert-list li a::before{content:'▪'; color:var(--g); font-size:11px;}
  .cert-list li a:hover{background:rgba(233,238,246,0.05); color:var(--text-0);}
  .cert-list li a:hover b{color:var(--v);}
  .cert-list li b{color:var(--text-0); font-weight:500; transition:color 0.2s;}
  .cert-go{
    margin-left:auto; font-family:var(--mono); font-size:11px; color:var(--text-2);
    opacity:0; transition:opacity 0.2s, transform 0.2s; flex-shrink:0;
  }
  .cert-list li a:hover .cert-go{opacity:1; color:var(--v); transform:translate(2px,-2px);}

  /* footer */
  footer{border-top:1px solid var(--line); padding:70px 0 40px;}
  .contact-grid{display:grid; grid-template-columns:1.2fr 1fr; gap:40px; margin-bottom:60px;}
  @media(max-width:760px){ .contact-grid{grid-template-columns:1fr;} }
  .contact-grid h2{font-size:clamp(28px,4vw,40px); margin-bottom:16px;}
  .contact-grid p{color:var(--text-1); max-width:48ch; margin-bottom:26px;}
  .contact-list{display:flex; flex-direction:column; gap:16px;}
  .contact-list a{display:flex; align-items:center; gap:12px; font-family:var(--mono); font-size:14px; color:var(--text-1); transition:color 0.2s;}
  .contact-list a:hover{color:var(--v);}
  .contact-list .k{color:var(--text-2); width:76px; flex-shrink:0; font-size:11px; text-transform:uppercase; letter-spacing:0.05em;}
  .foot-bottom{
    display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px;
    font-family:var(--mono); font-size:11.5px; color:var(--text-2);
    padding-top:28px; border-top:1px solid var(--line);
  }
  .foot-bottom .ok{color:var(--g);}

  .reveal{opacity:0; transform:translateY(16px); transition:opacity 0.6s ease, transform 0.6s ease;}
  .reveal.in{opacity:1; transform:translateY(0);}

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