:root{
  --bg:#0a0e16;
  --bg-soft:#111827;
  --bg-soft2:#0e1420;
  --fg:#e7e9ee;
  --fg-dim:#8b93a7;
  --accent:#3d9bff;
  --accent-dim:#2f7dd8;
  --line:#1f2733;
  --max:1080px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
html,body{margin:0;padding:0;}
body{
  background:var(--bg);
  color:var(--fg);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px;}
a{color:inherit;}

/* topbar */
.topbar{border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(10,14,22,.9);backdrop-filter:blur(6px);z-index:10;}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:24px;}
.mark{font-weight:600;color:var(--fg);font-size:15px;white-space:nowrap;}

.nav-links{display:flex;gap:28px;flex:1;justify-content:center;}
.nav-links a{color:var(--fg-dim);text-decoration:none;font-size:14px;transition:color .15s;}
.nav-links a:hover{color:var(--fg);}

.topbar-right{display:flex;align-items:center;gap:14px;}
.lang-toggle{background:none;border:1px solid var(--line);color:var(--fg-dim);border-radius:20px;padding:6px 14px;font-size:12px;letter-spacing:.05em;cursor:pointer;}
.lang-toggle:hover{border-color:var(--accent);color:var(--fg);}
.lang-opt{opacity:.5;}
[data-lang-active="ru"] .lang-opt[data-set="ru"]{opacity:1;color:var(--accent);}
[data-lang-active="en"] .lang-opt[data-set="en"]{opacity:1;color:var(--accent);}
.lang-sep{margin:0 4px;opacity:.3;}

.cta-outline{border:1px solid var(--accent-dim);color:var(--fg);text-decoration:none;font-size:13px;padding:9px 18px;border-radius:8px;white-space:nowrap;transition:background .15s,border-color .15s;}
.cta-outline:hover{background:rgba(61,155,255,.1);border-color:var(--accent);}

/* hero */
.hero{display:flex;align-items:center;gap:56px;padding:88px 24px 72px;}
.hero-text{flex:1;}
.hero-text h1{font-size:44px;margin:0 0 14px;font-weight:700;letter-spacing:-.01em;}
.role{color:var(--accent);margin:0 0 18px;font-size:20px;font-weight:600;line-height:1.35;max-width:560px;}
.tagline{color:var(--fg-dim);max-width:560px;margin:0 0 30px;font-size:15.5px;}
.hero-actions{display:flex;align-items:center;gap:22px;}
.hero-photo{flex-shrink:0;}
.hero-photo img{width:260px;height:260px;object-fit:cover;border-radius:16px;filter:grayscale(35%) contrast(1.05);border:1px solid var(--line);}

.btn-primary{display:inline-block;background:var(--accent);color:#04101f;text-decoration:none;font-weight:600;font-size:15px;padding:13px 26px;border-radius:8px;border:none;cursor:pointer;transition:background .15s;}
.btn-primary:hover{background:#63b0ff;}
.btn-block{width:100%;text-align:center;}

.scroll-hint{color:var(--fg-dim);display:flex;align-items:center;transition:color .15s;}
.scroll-hint:hover{color:var(--accent);}

/* sections */
section.wrap{padding:64px 24px;border-top:1px solid var(--line);}
h2{font-size:28px;margin:0 0 10px;font-weight:700;letter-spacing:-.01em;}
h2::after{content:"";display:block;width:44px;height:3px;background:var(--accent);margin-top:12px;border-radius:2px;}
.section-sub{color:var(--fg-dim);max-width:640px;margin:18px 0 36px;font-size:15px;}

/* expertise */
.expertise-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.expertise-card{background:var(--bg-soft);border:1px solid var(--line);border-radius:12px;padding:24px;}
.expertise-wide{grid-column:1 / -1;}
.icon-badge{width:36px;height:36px;border-radius:9px;background:rgba(61,155,255,.12);color:var(--accent);display:flex;align-items:center;justify-content:center;margin-bottom:14px;flex-shrink:0;}
.expertise-card h3{font-size:16px;margin:0 0 8px;font-weight:600;}
.expertise-card p{margin:0;font-size:14px;color:var(--fg-dim);}

/* timeline */
.timeline{position:relative;padding-left:28px;border-left:2px solid var(--line);}
.tl-item{position:relative;padding-bottom:40px;}
.tl-item:last-child{padding-bottom:0;}
.tl-dot{position:absolute;left:-34px;top:4px;width:11px;height:11px;border-radius:50%;background:var(--bg);border:2px solid var(--accent);}
.tl-date{color:var(--accent);font-size:13px;font-weight:600;letter-spacing:.03em;margin:0 0 6px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;}
.tl-item h3{margin:0 0 10px;font-size:18px;font-weight:600;}
.tl-item ul{margin:0;padding:0;list-style:none;}
.tl-item li{color:var(--fg-dim);font-size:14px;margin-bottom:6px;padding-left:16px;position:relative;}
.tl-item li::before{content:"—";position:absolute;left:0;color:var(--line);}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:40px;align-items:start;}
.contact-info{display:flex;flex-direction:column;gap:24px;}
.contact-row-item{display:flex;align-items:center;gap:14px;text-decoration:none;color:var(--fg);width:fit-content;}
.contact-text{display:flex;flex-direction:column;}
.contact-label{font-size:11px;letter-spacing:.08em;color:var(--fg-dim);}
.contact-value{font-size:19px;color:var(--accent);font-weight:600;}
.qr{border-radius:8px;background:#fff;padding:6px;width:120px;height:120px;}

.contact-form{background:var(--bg-soft);border:1px solid var(--line);border-radius:12px;padding:26px;display:flex;flex-direction:column;gap:6px;}
.contact-form label{font-size:13px;color:var(--fg-dim);margin-top:10px;}
.contact-form label:first-child{margin-top:0;}
.contact-form input,.contact-form textarea{background:var(--bg-soft2);border:1px solid var(--line);border-radius:8px;color:var(--fg);padding:11px 13px;font-size:14px;font-family:inherit;resize:vertical;}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--accent);}
.contact-form .btn-primary{margin-top:16px;}
.form-note{margin:10px 0 0;font-size:12px;color:var(--fg-dim);text-align:center;}

footer.wrap{border-top:1px solid var(--line);padding:28px 24px;color:var(--fg-dim);font-size:12px;}

@media (max-width:860px){
  .nav-links{display:none;}
  .cta-outline{font-size:12px;padding:8px 14px;}
}

@media (max-width:720px){
  .hero{flex-direction:column-reverse;text-align:center;padding:48px 20px 40px;gap:32px;}
  .hero-text h1{font-size:34px;}
  .role{max-width:none;font-size:18px;}
  .tagline{max-width:none;margin-left:auto;margin-right:auto;}
  .hero-actions{justify-content:center;}
  .hero-photo img{width:180px;height:180px;}
  .expertise-grid{grid-template-columns:1fr;}
  .expertise-wide{grid-column:auto;}
  .contact-grid{grid-template-columns:1fr;}
  .contact-info{align-items:center;}
}