:root{
    --ink:#12181F;
    --ink-soft:#4B5563;
    --paper:#F7F5F0;
    --paper-2:#FFFFFF;
    --line:#E3E0D6;
    --teal:#0E7C66;
    --teal-dark:#0B6353;
    --teal-soft:#E4F1EC;
    --amber:#C97A2B;
    --amber-soft:#F7ECDD;
    --nav-bg:rgba(247,245,240,0.9);
    --shadow-sm:0 2px 8px rgba(18,24,31,0.05);
    --shadow-md:0 12px 28px rgba(18,24,31,0.08);

    
    --contact-bg:#12181F;
    --contact-text:#F7F5F0;
    --contact-text-soft:#B7BEC7;
    --contact-border:#3A424D;
    --contact-btn-bg:#F7F5F0;
    --contact-btn-text:#12181F;

    --display:'Space Grotesk', sans-serif;
    --body:'Inter', system-ui, sans-serif;
    --mono:'JetBrains Mono', monospace;
    --maxw:1100px;
    --radius-sm:8px;
    --radius-md:14px;
    --radius-lg:20px;
  }

  
  :root[data-theme="dark"]{
    --ink:#EDEBE5;
    --ink-soft:#9AA1AB;
    --paper:#0F1318;
    --paper-2:#1A1F26;
    --line:#2A2F37;
    --teal:#22B899;
    --teal-dark:#1B9C81;
    --teal-soft:rgba(34,184,153,0.14);
    --amber:#E3A05C;
    --amber-soft:rgba(227,160,92,0.14);
    --nav-bg:rgba(15,19,24,0.86);
    --shadow-sm:0 2px 10px rgba(0,0,0,0.35);
    --shadow-md:0 16px 32px rgba(0,0,0,0.45);

    --contact-bg:#171D24;
    --contact-text:#F2F0EA;
    --contact-text-soft:#9BA3AD;
    --contact-border:#2E353E;
    --contact-btn-bg:#F2F0EA;
    --contact-btn-text:#12181F;
  }

  *{margin:0;padding:0;box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--paper);
    color:var(--ink);
    font-family:var(--body);
    line-height:1.65;
    -webkit-font-smoothing:antialiased;
    transition:background .25s ease, color .25s ease;
  }

  a{color:inherit;text-decoration:none;}
  ul{list-style:none;}
  img{max-width:100%;display:block;}
  ::selection{background:var(--teal-soft); color:var(--teal);}

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

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

  
  header{
    position:sticky; top:0; z-index:50;
    background:var(--nav-bg);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
    transition:background .25s ease, border-color .25s ease;
  }
  .nav{
    display:flex; align-items:center; justify-content:space-between;
    padding:16px 28px;
    max-width:var(--maxw); margin:0 auto;
    gap:16px;
  }
  .logo{
    font-family:var(--display); font-weight:700; font-size:19px; letter-spacing:-0.01em;
    display:flex; align-items:center; gap:8px;
    white-space:nowrap;
  }
  .logo .dot{width:8px;height:8px;border-radius:50%;background:var(--teal); display:inline-block; flex-shrink:0;}
  .navlinks{display:flex; align-items:center; gap:30px;}
  .navlinks a{
    font-size:14px; font-weight:500; color:var(--ink-soft);
    position:relative; padding:4px 0;
    transition:color .15s ease;
  }
  .navlinks a::after{
    content:""; position:absolute; left:0; right:100%; bottom:-2px; height:2px; background:var(--teal);
    transition:right .2s ease;
  }
  .navlinks a:hover{color:var(--ink);}
  .navlinks a.active{color:var(--ink);}
  .navlinks a.active::after{right:0;}

  .nav-right{display:flex; align-items:center; gap:14px; flex-shrink:0;}
  .nav-cta{
    font-size:13.5px; font-weight:600; color:var(--paper-2);
    background:var(--ink); padding:9px 18px; border-radius:100px;
    transition:background .15s ease, transform .15s ease;
    white-space:nowrap;
  }
  .nav-cta:hover{background:var(--teal); transform:translateY(-1px);}

  .theme-toggle{
    display:flex; align-items:center; justify-content:center;
    width:36px; height:36px; border-radius:50%;
    border:1px solid var(--line); background:var(--paper-2);
    cursor:pointer; flex-shrink:0;
    transition:border-color .15s ease, transform .15s ease, background .15s ease;
  }
  .theme-toggle:hover{border-color:var(--teal); transform:translateY(-1px);}
  .theme-toggle svg{width:17px; height:17px; stroke:var(--ink); flex-shrink:0;}
  .theme-toggle .icon-sun{display:none;}
  :root[data-theme="dark"] .theme-toggle .icon-moon{display:none;}
  :root[data-theme="dark"] .theme-toggle .icon-sun{display:block;}

  .burger{display:none; flex-direction:column; gap:4px; background:none; border:none; cursor:pointer; padding:6px; flex-shrink:0;}
  .burger span{width:22px; height:2px; background:var(--ink); display:block; transition:transform .2s ease, opacity .2s ease;}
  .burger.open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
  .burger.open span:nth-child(2){opacity:0;}
  .burger.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

  /* HERO */
  .hero{
    padding:96px 0 72px;
    position:relative;
    overflow:hidden;
  }
  .hero-grid{
    position:absolute; inset:0; z-index:0;
    background-image:
      linear-gradient(var(--line) 1px, transparent 1px),
      linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size:56px 56px;
    mask-image:radial-gradient(ellipse 70% 60% at 70% 20%, black, transparent);
    -webkit-mask-image:radial-gradient(ellipse 70% 60% at 70% 20%, black, transparent);
    opacity:0.6;
  }
  .hero-inner{position:relative; z-index:1;}
  .hero-flex{
    display:grid;
    grid-template-columns:1.25fr auto;
    align-items:center;
    gap:56px;
  }

  .hero-greet{
    font-size:17px; font-weight:500; color:var(--ink-soft); margin-bottom:6px;
  }
  h1.hero-name{
    font-family:var(--display); font-weight:700;
    font-size:clamp(36px, 5.4vw, 58px);
    line-height:1.05; letter-spacing:-0.02em;
    margin-bottom:6px;
  }
  .hero-role{
    font-family:var(--display); font-weight:600;
    font-size:clamp(18px, 2.2vw, 22px);
    color:var(--teal);
    margin-bottom:20px;
  }

  .status-pill{
    display:inline-flex; align-items:center; gap:8px;
    font-family:var(--mono); font-size:12.5px; color:var(--teal);
    background:var(--teal-soft); border:1px solid rgba(14,124,102,0.25);
    padding:7px 14px; border-radius:100px; margin-bottom:24px;
  }
  :root[data-theme="dark"] .status-pill{border-color:rgba(34,184,153,0.35);}
  .status-pill .pulse{
    width:7px;height:7px;border-radius:50%;background:var(--teal);
    box-shadow:0 0 0 0 rgba(14,124,102,0.5);
    animation:pulse 2s infinite;
    flex-shrink:0;
  }
  @keyframes pulse{
    0%{box-shadow:0 0 0 0 rgba(14,124,102,0.45);}
    70%{box-shadow:0 0 0 8px rgba(14,124,102,0);}
    100%{box-shadow:0 0 0 0 rgba(14,124,102,0);}
  }

  .hero-sub{
    font-size:16.5px; color:var(--ink-soft); max-width:560px; margin-bottom:32px;
  }
  .hero-actions{display:flex; gap:14px; flex-wrap:wrap; margin-bottom:48px;}
  .btn{
    font-size:14.5px; font-weight:600; padding:13px 24px; border-radius:var(--radius-sm);
    display:inline-flex; align-items:center; gap:8px;
    transition:transform .15s ease, box-shadow .15s ease, background .15s ease, border-color .15s ease;
    cursor:pointer; border:none;
  }
  .btn-primary{background:var(--ink); color:var(--paper);}
  .btn-primary:hover{background:var(--teal-dark); color:#fff; transform:translateY(-2px); box-shadow:0 8px 20px rgba(18,24,31,0.18);}
  .btn-ghost{background:transparent; color:var(--ink); border:1.5px solid var(--line);}
  .btn-ghost:hover{border-color:var(--ink); transform:translateY(-2px);}

  .hero-meta{
    display:grid; grid-template-columns:repeat(4, auto); gap:32px;
    padding-top:28px; border-top:1px solid var(--line);
  }
  .hero-meta div{display:flex; flex-direction:column; gap:4px;}
  .hero-meta .k{font-family:var(--mono); font-size:11px; text-transform:uppercase; letter-spacing:.06em; color:var(--ink-soft);}
  .hero-meta .v{font-size:14.5px; font-weight:600;}
  .hero-meta .v a:hover{color:var(--teal);}

  /*  Profile photo */
  .hero-avatar{display:flex; justify-content:center;}
  .avatar-ring{
    position:relative;
    width:300px; height:300px; border-radius:50%;
    padding:6px;
    background:var(--paper-2);
    border:1px solid var(--line);
    box-shadow:var(--shadow-md);
  }
  .avatar-img, .avatar-fallback{
    width:100%; height:100%; border-radius:50%;
    object-fit:cover;
  }
  .avatar-fallback{
    display:flex; align-items:center; justify-content:center;
    background:linear-gradient(155deg, var(--teal) 0%, var(--teal-dark) 100%);
    color:#fff;
    font-family:var(--display); font-weight:700; font-size:64px; letter-spacing:-0.02em;
  }
  .avatar-badge{
    position:absolute; bottom:10px; right:6px;
    display:flex; align-items:center; gap:6px;
    background:var(--paper-2); border:1px solid var(--line);
    padding:6px 10px; border-radius:100px;
    font-family:var(--mono); font-size:11px; font-weight:500; color:var(--ink);
    box-shadow:var(--shadow-sm);
  }
  .avatar-badge .pulse{width:6px;height:6px;border-radius:50%;background:var(--teal); animation:pulse 2s infinite; flex-shrink:0;}

  /*
     Section  (shared)
     */
  section{padding:84px 0;}
  section + section{border-top:1px solid var(--line);}
  .section-head{
    display:flex; align-items:baseline; gap:16px; margin-bottom:12px;
  }
  .section-num{
    font-family:var(--mono); font-size:13px; color:var(--teal); font-weight:500;
  }
  .section-title{
    font-family:var(--display); font-size:clamp(24px,3vw,32px); font-weight:700; letter-spacing:-0.01em;
  }
  .section-intro{color:var(--ink-soft); max-width:560px; margin-bottom:40px; font-size:15.5px;}

  .reveal{opacity:0; transform:translateY(18px); transition:opacity .6s ease, transform .6s ease;}
  .reveal.in{opacity:1; transform:translateY(0);}

  /*
     3. ABOUT
     */
  .about-grid{display:grid; grid-template-columns:1.1fr 0.9fr; gap:56px; align-items:start;}
  .about-text p{font-size:16px; color:var(--ink-soft); margin-bottom:16px;}
  .about-text strong{color:var(--ink); font-weight:600;}
  .about-card{
    background:var(--paper-2); border:1px solid var(--line); border-radius:var(--radius-md); padding:28px;
    box-shadow:var(--shadow-sm);
  }
  .about-card h4{font-family:var(--display); font-size:15px; margin-bottom:16px;}
  .stat-row{display:flex; justify-content:space-between; align-items:center; padding:12px 0; border-top:1px solid var(--line); font-size:14px;}
  .stat-row:first-of-type{border-top:none;}
  .stat-row .sk{color:var(--ink-soft);}
  .stat-row .sv{font-weight:600; text-align:right;}
  .status-chip{
    display:inline-block; font-size:12px; font-weight:600; color:var(--teal);
    background:var(--teal-soft); padding:3px 10px; border-radius:100px;
  }

  /* 
     4. SKILLS
      */
  .skills-cols{display:grid; grid-template-columns:repeat(auto-fit, minmax(240px,1fr)); gap:20px;}
  .skill-group{
    background:var(--paper-2); border:1px solid var(--line); border-radius:var(--radius-md);
    padding:22px; box-shadow:var(--shadow-sm);
  }
  .skill-group h4{
    font-family:var(--display); font-size:14.5px; margin-bottom:14px; color:var(--ink);
    display:flex; align-items:center; gap:8px;
  }
  .skill-group h4::before{content:""; width:6px; height:6px; border-radius:50%; background:var(--amber); flex-shrink:0;}
  .pill-row{display:flex; flex-wrap:wrap; gap:8px;}
  .pill{
    font-size:13px; font-weight:500; padding:7px 13px; border-radius:8px;
    background:var(--paper); border:1px solid var(--line); color:var(--ink);
    transition:border-color .15s ease, transform .15s ease, background .15s ease;
  }
  .pill:hover{border-color:var(--teal); background:var(--teal-soft); transform:translateY(-2px);}
  .pill.learning{
    color:var(--amber); background:var(--amber-soft); border-color:rgba(201,122,43,0.25);
  }

  /* 
     5. PROJECTS
     */
  .proj-grid{display:grid; gap:22px;}
  .proj-card{
    background:var(--paper-2); border:1px solid var(--line); border-radius:16px;
    padding:32px; display:grid; grid-template-columns:auto 1fr; gap:28px;
    transition:border-color .2s ease, box-shadow .2s ease;
  }
  .proj-card:hover{border-color:var(--teal); box-shadow:var(--shadow-md);}
  .proj-index{font-family:var(--mono); font-size:13px; color:var(--ink-soft); padding-top:4px;}
  .proj-title{font-family:var(--display); font-size:20px; font-weight:700; margin-bottom:10px;}
  .proj-desc{color:var(--ink-soft); font-size:14.5px; margin-bottom:16px;}
  .proj-points{display:grid; gap:8px; margin-bottom:18px;}
  .proj-points li{font-size:14px; color:var(--ink); padding-left:18px; position:relative;}
  .proj-points li::before{content:"—"; position:absolute; left:0; color:var(--teal);}
  .stack-row{display:flex; flex-wrap:wrap; gap:8px; margin-bottom:20px;}
  .stack-tag{
    font-family:var(--mono); font-size:11.5px; color:var(--teal);
    background:var(--teal-soft); padding:5px 10px; border-radius:6px;
  }
  .proj-actions{display:flex; gap:10px; flex-wrap:wrap;}
  .proj-btn{
    font-size:13px; font-weight:600; padding:9px 16px; border-radius:7px;
    display:inline-flex; align-items:center; gap:7px;
    border:1.5px solid var(--line); color:var(--ink);
    transition:border-color .15s ease, transform .15s ease, background .15s ease;
  }
  .proj-btn svg{width:14px; height:14px; flex-shrink:0;}
  .proj-btn:hover{border-color:var(--ink); transform:translateY(-2px);}
  .proj-btn.live{background:var(--ink); color:var(--paper); border-color:var(--ink);}
  .proj-btn.live:hover{background:var(--teal-dark); border-color:var(--teal-dark); color:#fff;}

  /* 
     6. EDUCATION — simple timeline
     */
  .timeline{position:relative; padding-left:32px;}
  .timeline::before{
    content:""; position:absolute; left:5px; top:6px; bottom:6px; width:2px; background:var(--line);
  }
  .tl-item{position:relative; padding-bottom:38px;}
  .tl-item:last-child{padding-bottom:0;}
  .tl-item::before{
    content:""; position:absolute; left:-32px; top:4px; width:12px; height:12px; border-radius:50%;
    background:var(--paper); border:2.5px solid var(--teal);
  }
  .tl-period{font-family:var(--mono); font-size:12.5px; color:var(--teal); margin-bottom:4px;}
  .tl-title{font-family:var(--display); font-size:17px; font-weight:700; margin-bottom:4px;}
  .tl-org{color:var(--ink-soft); font-size:14px;}
  .tl-score{
    display:inline-block; margin-top:8px; font-family:var(--mono); font-size:12px;
    background:var(--amber-soft); color:var(--amber); padding:4px 10px; border-radius:6px;
  }

  /* 
     7. CERTIFICATIONS 
      */
  .cert-grid{display:grid; grid-template-columns:repeat(auto-fit, minmax(260px,1fr)); gap:18px;}
  .cert-card{
    background:var(--paper-2); border:1px solid var(--line); border-radius:12px; padding:22px;
    box-shadow:var(--shadow-sm);
    transition:border-color .15s ease, transform .15s ease;
  }
  .cert-card:hover{border-color:var(--teal); transform:translateY(-2px);}
  .cert-name{font-weight:600; font-size:15px; margin-bottom:6px;}
  .cert-org{color:var(--ink-soft); font-size:13.5px; margin-bottom:10px;}
  .cert-date{font-family:var(--mono); font-size:11.5px; color:var(--teal);}

  /* 
     8. CONTACT 
      */
  .contact-box{
    background:var(--contact-bg); color:var(--contact-text); border-radius:var(--radius-lg);
    padding:64px 48px; text-align:center;
    transition:background .25s ease;
  }
  .contact-box h2{
    font-family:var(--display); font-size:clamp(26px,4vw,38px); font-weight:700; margin-bottom:14px;
  }
  .contact-box p{color:var(--contact-text-soft); max-width:480px; margin:0 auto 32px; font-size:15.5px;}
  .contact-actions{display:flex; gap:14px; justify-content:center; flex-wrap:wrap; margin-bottom:40px;}
  .contact-box .btn-primary{background:var(--contact-btn-bg); color:var(--contact-btn-text);}
  .contact-box .btn-primary:hover{background:var(--teal); color:#fff;}
  .contact-box .btn-ghost{border-color:var(--contact-border); color:var(--contact-text);}
  .contact-box .btn-ghost:hover{border-color:var(--contact-text);}

  .contact-grid{
    display:grid; grid-template-columns:repeat(4,1fr); gap:12px;
    max-width:640px; margin:0 auto;
  }
  .contact-link{
    display:flex; flex-direction:column; align-items:center; gap:8px;
    padding:16px 10px; border-radius:12px; border:1px solid var(--contact-border);
    font-size:12.5px; font-weight:500; color:var(--contact-text-soft);
    transition:border-color .15s ease, background .15s ease, transform .15s ease;
  }
  .contact-link svg{width:18px; height:18px;}
  .contact-link:hover{border-color:var(--teal); background:rgba(14,124,102,0.14); color:var(--contact-text); transform:translateY(-2px);}

  footer{
    padding:32px 0; text-align:center; font-size:13px; color:var(--ink-soft);
  }

  /*
     RESPONSIVENESS
     */
  @media (max-width:900px){
    .hero-flex{grid-template-columns:1fr; text-align:center;}
    .hero-avatar{order:-1;}
    .avatar-ring{width:160px; height:160px;}
    .avatar-fallback{font-size:44px;}
    .hero-actions{justify-content:center;}
    .hero-meta{grid-template-columns:repeat(2,1fr); justify-items:center; text-align:center;}
  }
  @media (max-width:820px){
    .about-grid{grid-template-columns:1fr;}
    .proj-card{grid-template-columns:1fr; gap:12px;}
    .contact-grid{grid-template-columns:repeat(2,1fr);}
  }
  @media (max-width:700px){
    .navlinks{
      position:fixed; top:60px; left:0; right:0; background:var(--paper-2);
      flex-direction:column; align-items:flex-start; padding:20px 28px; gap:18px;
      border-bottom:1px solid var(--line);
      transform:translateY(-130%); transition:transform .25s ease;
    }
    .navlinks.open{transform:translateY(0);}
    .burger{display:flex;}
    .nav-cta{display:none;}
    .hero{padding:56px 0 48px;}
    section{padding:56px 0;}
    .contact-box{padding:44px 22px;}
    .contact-actions .btn{width:100%; justify-content:center;}
  }
  @media (max-width:420px){
    .hero-meta{grid-template-columns:1fr;}
  }
  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto;}
    .reveal{opacity:1; transform:none; transition:none;}
    .status-pill .pulse, .avatar-badge .pulse{animation:none;}
  }