:root{
    --bg-light:#EEF3FB;
    --bg-white:#FFFFFF;
    --bg-dark:#060B18;
    --bg-dark-2:#0B1830;
    --text-dark:#16233B;
    --text-body:#48566E;
    --text-on-dark:#E8F0FC;
    --text-on-dark-dim:#93A8C9;
    --accent:#2F6FED;
    --accent-bright:#5B8DFF;
    --accent-deep:#1E4FC7;
    --accent-soft:rgba(47,111,237,0.10);
    --border:#D9E3F5;
    --border-dark:#1D2C4B;
    --serif:'Playfair Display', Georgia, serif;
    --sans:'Inter', sans-serif;
  }

  *{box-sizing:border-box; margin:0; padding:0;}
  html{scroll-behavior:smooth;}
  body{font-family:var(--sans); color:var(--text-dark); background:var(--bg-white); line-height:1.6;}
  a{color:inherit; text-decoration:none;}
  img{max-width:100%; display:block;}
  :focus-visible{outline:2px solid var(--accent); outline-offset:3px;}
  ::selection{background:var(--accent-soft); color:var(--text-dark);}

  .wrap{max-width:1680px; margin:0 auto; padding:0 32px;}
  section{padding:96px 0;}

  h1,h2,h3{font-family:var(--serif); font-weight:700; letter-spacing:-0.01em;}

  /* ---------- Nav ---------- */
  header{
    background:var(--bg-white); border-bottom:1px solid var(--border);
    position:sticky; top:0; z-index:100;
  }
  .nav-inner{
    max-width:1680px; margin:0 auto; padding:20px 32px;
    display:flex; align-items:center; justify-content:space-between;
  }
  .logo{font-family:var(--serif); font-size:1.5rem; font-weight:700; color:var(--accent-deep); letter-spacing:0.02em;}
  nav ul{list-style:none; display:flex; gap:34px; align-items:center;}
  nav a{font-size:0.95rem; font-weight:500; color:var(--text-dark);}
  nav a:hover{color:var(--accent);}
  nav a.active{color:var(--accent-deep); font-weight:600;}
  .btn-nav{
    background:var(--accent); color:#fff !important; padding:11px 22px;
    border-radius:4px; font-weight:600;
  }
  .btn-nav:hover{background:var(--accent-deep);}

  /* ---------- Hero ---------- */
  .hero{
    position:relative; overflow:hidden;
    aspect-ratio:1536/660;
    padding:0;
  }
  .hero::before{
    content:''; position:absolute; inset:0;
    background:url('images/hero-bg.jpg');
    background-size:cover; background-position:center;
  }
  .hero::after{
    content:''; position:absolute; inset:0;
    background:linear-gradient(120deg, rgba(6,11,24,0.05) 0%, rgba(6,11,24,0.05) 65%, rgba(6,11,24,0.35) 78%, rgba(6,11,24,0.15) 100%);
  }
  .hero-inner{
    position:relative; z-index:20;
    max-width:1920px; margin:0 auto; padding:32px;
    width:100%; height:100%;
  }
  .hero-copy{
    color:var(--text-on-dark); max-width:480px; text-align:right;
    position:absolute; top:6%; right:3%;
  }
  .hero-copy p{
    font-weight:500; line-height:1.55; letter-spacing:0.01em;
    text-transform:uppercase; font-size:0.95rem; color:var(--text-on-dark);
  }
  .hero-copy p + p{margin-top:16px;}

  .hero-form{
    position:absolute; bottom:0; right:0;
    background:linear-gradient(135deg, var(--accent), var(--accent-deep));
    border-radius:8px 0 0 0; padding:20px 28px 64px;
    width:100%; max-width:400px;
    box-shadow:0 -20px 50px -20px rgba(6,11,24,0.6);
  }
  .hero-form h3{
    font-family:var(--sans); font-size:0.78rem; font-weight:600; color:#fff;
    text-transform:uppercase; letter-spacing:0.06em; margin-bottom:14px;
  }
  .hero-form-row{display:grid; grid-template-columns:1fr 1fr; gap:14px; margin-bottom:12px;}
  .hero-form input{
    width:100%; background:transparent; border:none; border-bottom:1px solid rgba(255,255,255,0.5);
    color:#fff; font-family:var(--sans); font-size:0.85rem; padding:6px 2px;
  }
  .hero-form input::placeholder{color:rgba(255,255,255,0.75);}
  .hero-form input:focus{outline:none; border-bottom-color:#fff;}
  .hero-form button{
    margin-top:14px; background:#fff; color:var(--accent-deep); border:none;
    font-family:var(--sans); font-weight:600; font-size:0.82rem;
    padding:10px 22px; border-radius:4px; cursor:pointer; float:right;
  }
  .hero-form button:hover{background:#EAF1FC;}

  /* ---------- Professional Summary ---------- */
  .summary{background:var(--bg-light);}
  .summary .wrap{max-width:1680px;}
  .summary-grid{display:grid; grid-template-columns:2fr 1.1fr; gap:48px; align-items:start;}
  .summary h2{font-size:2.6rem; margin-bottom:4px; line-height:1.1;}
  .rule{width:48px; height:1px; background:var(--accent); margin-bottom:32px;}
  .summary p.bio{color:var(--text-body); font-size:1.02rem;}
  .core-skills-label{
    font-family:var(--serif); font-weight:700; color:var(--accent-deep);
    font-size:1.2rem; margin-top:36px; margin-bottom:16px;
  }
  .skill-pills{display:flex; flex-wrap:wrap; gap:10px;}
  .skill-pill{
    border:1px solid var(--accent); color:var(--accent-deep);
    background:var(--accent-soft); font-size:0.88rem; font-weight:500;
    padding:8px 16px; border-radius:4px;
  }
  .summary-photo{
    border-radius:6px; overflow:hidden;
  }
  .summary-photo img{
    width:100%; height:auto; object-fit:cover; display:block;
  }

  /* ---------- Core Services ---------- */
  .services{background:var(--bg-white);}
  .services-grid{display:grid; grid-template-columns:0.85fr 1.15fr; gap:64px;}
  .services h2{font-size:2.6rem; line-height:1.1; margin-bottom:18px;}
  .services-intro p{color:var(--text-body); max-width:38ch;}
  .service-list{display:flex; flex-direction:column;}
  .service-item{padding:28px 0; border-top:1px solid var(--border);}
  .service-item:last-child{border-bottom:1px solid var(--border);}
  .service-icon{margin-bottom:14px;}
  .service-item h3{font-size:1.35rem; margin-bottom:10px;}
  .service-item p{color:var(--text-body); font-size:0.96rem; max-width:52ch;}
  .service-cols{display:grid; grid-template-columns:1fr 1fr; column-gap:48px;}

  /* ---------- Resume ---------- */
  .resume-hero{
    background:linear-gradient(135deg, var(--accent), var(--accent-deep));
    color:#fff; text-align:center; padding:88px 0;
  }
  .resume-hero h1{font-size:3rem; color:#fff; margin-bottom:16px;}
  .resume-hero p{font-size:1.1rem; color:rgba(255,255,255,0.88);}

  .resume-block{background:var(--bg-light);}
  .resume-block:nth-of-type(even){background:var(--bg-white);}
  .resume-block h2{font-size:2.2rem; margin-bottom:40px;}
  .resume-block h2.centered{text-align:center;}

  .about-meta{display:flex; flex-direction:column; align-items:center; gap:10px; margin-top:20px;}
  .about-meta span{display:flex; align-items:center; gap:10px; font-size:0.95rem; color:var(--text-dark);}
  .about-meta svg{flex-shrink:0;}
  .about-meta a{color:var(--accent-deep); font-weight:500;}
  .about-meta a:hover{color:var(--accent);}

  .timeline{max-width:900px;}
  .timeline-item{
    border-left:2px solid var(--accent); padding-left:26px; margin-bottom:40px;
  }
  .timeline-item:last-child{margin-bottom:0;}
  .timeline-item h3{font-size:1.3rem; color:var(--accent-deep); margin-bottom:4px;}
  .timeline-item .org{font-weight:600; color:var(--text-dark); font-size:1rem; margin-bottom:6px;}
  .timeline-meta{display:flex; gap:18px; flex-wrap:wrap; color:var(--text-body); font-size:0.85rem; margin-bottom:14px;}
  .timeline-meta span{display:flex; align-items:center; gap:6px;}
  .timeline-item ul{list-style:none;}
  .timeline-item ul li{
    position:relative; padding-left:16px; color:var(--text-body); font-size:0.94rem;
    margin-bottom:7px; line-height:1.55;
  }
  .timeline-item ul li::before{content:'▪'; position:absolute; left:0; color:var(--accent); font-size:0.75rem; top:3px;}

  .cred-grid{display:grid; grid-template-columns:repeat(2, 1fr); gap:36px 56px;}
  .cred-grid-3{display:grid; grid-template-columns:repeat(3, 1fr); gap:36px 40px;}
  .cred-item{border-left:2px solid var(--accent); padding-left:22px;}
  .cred-item .cred-icon{margin-bottom:10px;}
  .cred-item h3{font-size:1.05rem; color:var(--accent-deep); margin-bottom:6px; line-height:1.3;}
  .cred-item .org{font-weight:600; color:var(--text-dark); font-size:0.95rem; margin-bottom:4px;}
  .cred-item .meta-line{display:flex; gap:14px; flex-wrap:wrap; color:var(--text-body); font-size:0.85rem;}
  .cred-item .meta-line span{display:flex; align-items:center; gap:5px;}
  .cred-item .credential-link{
    display:inline-flex; align-items:center; gap:5px; color:var(--accent); font-weight:500;
    font-size:0.9rem; margin-top:4px;
  }
  .cred-item .credential-link:hover{color:var(--accent-deep);}
  .cred-item .lang-level{color:var(--text-body); font-size:0.9rem; margin-top:2px;}

  .ref-grid{display:grid; grid-template-columns:repeat(2, 1fr); gap:40px 56px;}
  .ref-item h3{font-size:1.1rem; color:var(--accent-deep); margin-bottom:8px;}
  .ref-item .ref-name{font-weight:600; color:var(--text-dark); font-size:1rem; margin-bottom:2px;}
  .ref-item .ref-role{color:var(--text-body); font-size:0.9rem; margin-bottom:12px;}
  .ref-item p.ref-note{color:var(--text-body); font-size:0.94rem; max-width:52ch;}

  /* ---------- Portfolio ---------- */
  .portfolio{background:var(--bg-light);}
  .portfolio-head{max-width:60ch; margin-bottom:52px;}
  .portfolio-head h2{font-size:2.6rem; margin-bottom:18px;}
  .portfolio-head p{color:var(--text-body);}
  .portfolio-grid{display:grid; grid-template-columns:repeat(3, 1fr); gap:24px;}
  .portfolio-card{
    background:var(--bg-white); border:1px solid var(--border); border-radius:8px;
    overflow:hidden; display:flex; flex-direction:column;
  }
  .portfolio-card .card-image{
    width:100%; aspect-ratio:4/3; overflow:hidden; background:var(--bg-light);
    display:flex; align-items:center; justify-content:center;
  }
  .portfolio-card .card-image img{width:100%; height:100%; object-fit:cover; display:block;}
  .portfolio-card .card-image .no-image{
    color:var(--text-body); font-size:0.85rem; font-family:var(--sans);
  }
  .portfolio-card .card-body{padding:28px 32px 32px; display:flex; flex-direction:column; flex:1;}
  .portfolio-card h3{font-size:1.4rem; margin-bottom:10px;}
  .portfolio-card p{color:var(--text-body); font-size:0.95rem; flex:1;}
  .portfolio-link{
    margin-top:18px; font-weight:600; color:var(--accent); font-size:0.92rem;
    display:inline-block; width:fit-content;
  }
  .portfolio-link:hover{color:var(--accent-deep);}

  /* ---------- Technical Expertise ---------- */
  .expertise{background:var(--bg-dark); color:var(--text-on-dark);}
  .expertise-grid{display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:center;}
  .expertise-graphic{border-radius:6px; overflow:hidden; aspect-ratio:4/5;}
  .expertise-graphic svg{width:100%; height:100%; display:block;}
  .expertise h2{font-size:2.6rem; color:#fff; margin-bottom:18px; line-height:1.1;}
  .expertise-copy p{color:var(--text-on-dark-dim); max-width:52ch; margin-bottom:28px;}
  .expertise-list{list-style:none;}
  .expertise-list li{
    display:flex; gap:12px; align-items:flex-start; padding:9px 0; font-size:1rem; color:var(--text-on-dark);
  }
  .expertise-list li::before{
    content:''; width:7px; height:7px; border-radius:50%; background:var(--accent-bright);
    margin-top:9px; flex-shrink:0;
  }

  /* ---------- CTA ---------- */
  .cta{
    background:linear-gradient(135deg, var(--accent), var(--accent-deep));
    text-align:center; color:#fff;
  }
  .cta h2{font-size:2.6rem; color:#fff; max-width:16ch; margin:0 auto 20px;}
  .cta p{max-width:56ch; margin:0 auto 32px; color:rgba(255,255,255,0.88); font-size:1.05rem;}
  .cta-btn{
    display:inline-block; background:#fff; color:var(--accent-deep) !important;
    font-weight:600; padding:16px 34px; border-radius:4px; font-size:0.98rem;
  }
  .cta-btn:hover{background:#EAF1FC;}

  /* ---------- Footer ---------- */
  footer{background:var(--bg-dark-2); color:var(--text-on-dark-dim); padding:72px 0 0;}
  .footer-grid{
    display:grid; grid-template-columns:1.3fr 1fr 1fr 1.1fr; gap:40px;
    padding-bottom:48px; border-bottom:1px solid var(--border-dark);
  }
  .footer-brand h3{font-family:var(--serif); color:#fff; font-size:1.5rem; margin-bottom:14px;}
  .footer-brand p{font-size:0.92rem; max-width:32ch;}
  footer h4{color:#fff; font-family:var(--sans); font-size:0.95rem; font-weight:600; margin-bottom:18px;}
  footer ul{list-style:none;}
  footer ul li{margin-bottom:11px;}
  footer ul li a{font-size:0.92rem;}
  footer ul li a:hover{color:var(--accent-bright);}
  .footer-contact li{display:flex; align-items:center; gap:10px; font-size:0.92rem;}
  .footer-socials{display:flex; gap:12px; margin-top:18px;}
  .footer-socials a{
    width:34px; height:34px; border:1px solid var(--border-dark); border-radius:50%;
    display:flex; align-items:center; justify-content:center;
  }
  .footer-socials a:hover{border-color:var(--accent-bright);}
  .footer-bottom{
    text-align:center; padding:24px 0; font-size:0.85rem;
  }

  @media (max-width: 860px){
    section{padding:64px 0;}
    .hero-copy{max-width:80%; font-size:0.78rem; top:4%; right:4%;}
    .summary-grid, .services-grid, .expertise-grid{grid-template-columns:1fr;}
    .summary-photo{max-width:340px; margin:0 auto;}
    .service-cols{grid-template-columns:1fr;}
    .portfolio-grid{grid-template-columns:1fr;}
    .cred-grid, .cred-grid-3, .ref-grid{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr 1fr; row-gap:36px;}
    nav ul{gap:18px;}
  }
  @media (max-width: 560px){
    .nav-inner{padding:16px 20px;}
    nav ul li:not(:last-child){display:none;}
    .wrap{padding:0 20px;}
    .summary h2, .services h2, .portfolio-head h2, .expertise h2, .cta h2, .resume-hero h1, .resume-block h2{font-size:1.9rem !important;}
    .footer-grid{grid-template-columns:1fr;}
  }

/* ---------- Contact Page ---------- */
.contact-hero{
  background:linear-gradient(135deg, var(--accent), var(--accent-deep));
  color:#fff; text-align:center; padding:88px 0;
}
.contact-hero h1{font-size:3rem; color:#fff; margin-bottom:16px;}
.contact-hero p{font-size:1.1rem; color:rgba(255,255,255,0.88);}

.contact-body{background:var(--bg-light);}
.contact-grid{display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:start;}
.contact-grid h2{font-size:2rem; margin-bottom:20px;}
.contact-grid p.lead{color:var(--text-body); font-size:1.02rem; max-width:52ch; margin-bottom:32px;}
.contact-details{display:flex; flex-direction:column; gap:20px;}
.contact-details a{
  display:flex; align-items:center; gap:14px; font-size:1.02rem; color:var(--text-dark);
  padding:16px 20px; background:var(--bg-white); border:1px solid var(--border); border-radius:8px;
}
.contact-details a:hover{border-color:var(--accent); color:var(--accent-deep);}
.contact-details svg{flex-shrink:0;}
.contact-note{background:var(--bg-white); border:1px solid var(--border); border-radius:8px; padding:32px;}
.contact-note h3{font-size:1.2rem; margin-bottom:12px; color:var(--accent-deep);}
.contact-note p{color:var(--text-body); font-size:0.98rem;}

@media (max-width: 860px){
  .contact-grid{grid-template-columns:1fr;}
}