:root {
  --bg: #0b1120;
  --bg-2: #0f172a;
  --card: rgba(17, 26, 46, 0.92);
  --card-soft: rgba(255,255,255,0.04);
  --line: rgba(148, 163, 184, 0.18);
  --text: #e5eefc;
  --muted: #a9b8d2;
  --accent: #60a5fa;
  --accent-2: #3b82f6;
  --success: #34d399;
  --shadow-card: 0 20px 50px rgba(0, 0, 0, 0.35);
  --shadow-soft: 0 10px 26px rgba(0, 0, 0, 0.22);
  --radius-xs: 12px;
  --radius-sm: 14px;
  --radius-md: 18px;
  --radius-lg: 22px;
  --container: 1180px;
  --space-1: 8px;
  --space-2: 12px;
  --space-3: 16px;
  --space-4: 20px;
  --space-5: 24px;
  --space-6: 28px;
  --space-7: 32px;
  --space-8: 40px;
  --font-ui: Inter, Arial, sans-serif;
  --lh-tight: 1.05;
  --lh-body: 1.7;
  --letter-tight: -0.02em;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-ui);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(59,130,246,0.18), transparent 24%),
    radial-gradient(circle at top right, rgba(52,211,153,0.14), transparent 22%),
    linear-gradient(180deg, #08101d 0%, #0b1120 100%);
}
a { color: inherit; }
main { flex: 1 0 auto; display: block; width: 100%; }
img { max-width: 100%; display: block; }
.lang-en { display: none; }
body[data-current-lang="en"] .lang-ru { display: none; }
body[data-current-lang="en"] .lang-en { display: inline; }
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent-2);
  color: #fff;
  padding: 10px 16px;
  z-index: 1000;
  border-radius: 0 0 12px 12px;
}
.skip-link:focus { left: 12px; }
.container { width: min(calc(100% - 32px), var(--container)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(18px);
  background: linear-gradient(180deg, rgba(8, 16, 29, 0.92), rgba(8, 16, 29, 0.84));
  border-bottom: 1px solid var(--line);
}
.site-header::after {
  content: "";
  display: block;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(96,165,250,0.35), transparent);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 86px;
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  min-width: 0;
}
.brand img {
  width: 58px;
  height: 58px;
  min-width: 58px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center top;
  border-radius: 50%;
  border: 2px solid rgba(96,165,250,0.38);
  background: #0f172a;
  box-shadow: 0 0 0 4px rgba(96,165,250,0.08), var(--shadow-soft);
}
.brand-title { min-width: 0; }
.brand-title > span {
  display: block;
  font-size: clamp(18px, 2vw, 20px);
  font-weight: 800;
  letter-spacing: var(--letter-tight);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.brand-title small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.nav-wrap { position: relative; display: flex; align-items: center; gap: 16px; }
.site-nav { display: flex; align-items: center; gap: 12px; }
.site-nav a,
.lang-switch button,
.burger,
.print-btn,
.btn,
.btn-secondary {
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  transition: 0.22s ease;
}
.site-nav a,
.lang-switch button,
.burger,
.print-btn {
  font-weight: 500;
  background: transparent;
  padding: 10px 16px;
  font-size: 14px;
}
.site-nav a:hover,
.site-nav a[aria-current="page"],
.lang-switch button:hover,
.lang-switch button.active,
.burger:hover,
.print-btn:hover {
  background: rgba(96,165,250,0.14);
  border-color: rgba(96,165,250,0.3);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}
.lang-switch {
  display: inline-flex;
  gap: 8px;
  padding: 4px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.04);
  border-radius: 999px;
}
.lang-switch button.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: var(--accent-2);
  color: #fff;
}
.burger { display: none; }
.card,
.hero-card,
.info-card,
.section-card,
.service-card,
.faq-card,
.marquee-box,
.profile-card,
.summary-card,
.content-card,
.contact-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}
.btn,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  font-weight: 600;
  border-radius: var(--radius-xs);
}
.btn {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
}
.btn-secondary {
  background: rgba(96,165,250,0.08);
  border-color: rgba(96,165,250,0.28);
}
.hero { padding: 64px 0 48px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr); gap: var(--space-6); align-items: stretch; }
.hero-card, .info-card, .section-card, .service-card, .faq-card, .profile-card, .summary-card, .content-card, .contact-card { padding: var(--space-6); }
.hero-card, .profile-card, .contact-copy { position: relative; overflow: hidden; }
.card, .hero-card, .info-card, .section-card, .service-card, .faq-card, .profile-card, .summary-card, .content-card, .contact-card { backdrop-filter: blur(4px); }
.hero-card::before, .profile-card::before, .contact-copy::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(96,165,250,0.12), transparent 70%);
  pointer-events: none;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--success);
  border: 1px solid rgba(52,211,153,0.25);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13px;
  margin-bottom: var(--space-5);
}
.hero h1, .contact-hero h1 { font-size: clamp(34px, 5vw, 60px); line-height: var(--lh-tight); letter-spacing: var(--letter-tight); margin: 0 0 var(--space-3); }
.lead { margin: 0 0 24px; color: var(--muted); font-size: 18px; line-height: var(--lh-body); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
.hero-points { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.hero-points div {
  min-height: 112px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  background: var(--card-soft);
  color: var(--muted);
}
.hero-points strong { display: block; font-size: 22px; color: var(--text); margin-bottom: 4px; }
.main-sections { padding-bottom: 56px; }
.section-head { display: flex; justify-content: space-between; gap: 20px; align-items: end; margin-bottom: 22px; }
.section-head h2, .summary-card h2, .content-card h2 { margin: 0; font-size: clamp(28px, 3vw, 38px); line-height: 1.12; letter-spacing: var(--letter-tight); }
.section-head p { margin: 10px 0 0; color: var(--muted); max-width: 720px; line-height: var(--lh-body); }
.services-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-4); margin-bottom: 46px; }
.service-card { transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease; }
.service-card:hover, .faq-card:hover, .summary-item:hover, .skill-item:hover, .language-item:hover, .timeline-item:hover, .cert-item:hover, .edu-item:hover {
  transform: translateY(-2px);
  border-color: rgba(96,165,250,0.24);
  box-shadow: var(--shadow-soft);
}
.service-card i {
  display: inline-flex;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xs);
  background: rgba(96,165,250,0.12);
  color: var(--accent);
  margin-bottom: 16px;
}
.service-card h3, .faq-card h3, .timeline-item h3, .cert-item h3, .edu-item h3 { margin: 0 0 10px; font-size: 18px; line-height: 1.25; letter-spacing: -0.01em; }
.service-card p, .faq-card p, .timeline-item p, .timeline-item li, .cert-item p, .edu-item p, .summary-item span, .skill-item span, .language-item span, .section-card p, .section-card li { color: var(--muted); line-height: 1.65; }
.two-column, .resume-hero-grid, .content-grid, .contact-hero-grid { display: grid; gap: var(--space-5); }
.two-column { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-bottom: 46px; }
.section-card ul, .timeline-item ul { margin: 0; padding-left: 18px; }
.pricing-list, .summary-list, .skills-list, .language-list, .timeline { display: grid; gap: 12px; }
.pricing-pill, .summary-item, .skill-item, .language-item, .timeline-item, .cert-item, .edu-item {
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--card-soft);
}
.price-highlight { font-size: 32px; font-weight: 800; color: #fff; margin: 4px 0 12px; }
.faq-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4); margin-bottom: 42px; }
.terminal-marquee {
  overflow: hidden;
  border-radius: var(--radius-md);
  background: #020617;
  border: 1px solid rgba(52, 211, 153, 0.18);
  color: #34d399;
  font-family: "Courier New", monospace;
  padding: 16px 0;
}
.marquee-text { display: inline-block; white-space: nowrap; padding-left: 100%; will-change: transform; animation: marquee 45s linear infinite; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-100%); } }
.resume-hero { padding: 64px 0 48px; }
.resume-hero-grid { grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr); }
.content-grid { grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr); padding-bottom: 56px; }
.profile-card img {
  width: 110px;
  height: 110px;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  margin-bottom: 18px;
  border: 2px solid rgba(96,165,250,0.35);
}
.profile-card h1 { margin: 0 0 10px; font-size: clamp(32px, 5vw, 52px); line-height: var(--lh-tight); }
.profile-card p { margin: 0 0 18px; color: var(--muted); line-height: var(--lh-body); }
.summary-item strong, .skill-item strong, .language-item strong { display: block; margin-bottom: 6px; }
.timeline-item time, .cert-item time, .edu-item time {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
  border: 1px solid rgba(96,165,250,0.28);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
}
.stack { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; }
.stack span {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(96,165,250,0.12);
  border: 1px solid rgba(96,165,250,0.22);
}
.page-contact .hero {
  padding-top: 56px;
  padding-bottom: 72px;
}
.contact-hero-grid {
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.78fr);
  align-items: start;
}
.contact-copy, .contact-card { padding: var(--space-7); }
.page-contact .contact-copy {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.page-contact .contact-copy h1 {
  margin: 0;
  max-width: 11ch;
  font-size: clamp(30px, 4.4vw, 54px);
  line-height: 1.08;
}
.page-contact .contact-copy .lead {
  margin: 0;
  max-width: 62ch;
  font-size: 17px;
}
.page-contact .hero-points {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 2px;
}
.page-contact .hero-points div {
  min-height: 0;
  padding: 18px 16px;
  line-height: 1.55;
}
.page-contact .hero-points div:last-child {
  grid-column: 1 / -1;
}
.krv-contact-title { margin: 0 0 14px; font-size: 1.95rem; text-align: left; }
.krv-contact-lead {
  margin: 0 0 24px;
  color: var(--muted);
  text-align: left;
  line-height: var(--lh-body);
}
.krv-contact-list { display: grid; gap: 14px; }
.krv-contact-item {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 14px;
  min-height: 60px;
  padding: 14px 18px;
  background: var(--card-soft);
  border: 1px solid rgba(96,165,250,0.18);
  border-radius: var(--radius-sm);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}
.krv-contact-item:hover { background: rgba(96,165,250,0.1); border-color: rgba(96,165,250,0.3); transform: translateY(-1px); }
.krv-contact-icon {
  width: 22px;
  height: 22px;
  color: var(--accent);
  flex: 0 0 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.krv-contact-icon svg { width: 100%; height: 100%; display: block; fill: currentColor; }
.krv-contact-item a { text-decoration: none; font-weight: 500; line-height: 1.35; word-break: break-word; }
.krv-contact-item a:hover { color: var(--accent); }
.site-footer {
  margin-top: auto;
  padding: 36px 0 40px;
  color: var(--muted);
  background: linear-gradient(180deg, rgba(8,16,29,0), rgba(8,16,29,0.35));
}
.footer-box {
  display: flex;
  width: 100%;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid var(--line);
  padding-top: var(--space-5);
  align-items: center;
  justify-content: space-between;
}
.footer-links { display: flex; gap: 12px; flex-wrap: wrap; }
.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(96,165,250,0.16);
  background: rgba(255,255,255,0.03);
  text-decoration: none;
  transition: 0.22s ease;
}
.footer-links a:hover {
  background: rgba(96,165,250,0.12);
  border-color: rgba(96,165,250,0.28);
}
@media (max-width: 980px) {
  .hero-grid, .services-grid, .two-column, .faq-grid, .resume-hero-grid, .content-grid, .contact-hero-grid { grid-template-columns: 1fr; }
  .hero-points { grid-template-columns: 1fr; }
  .site-nav {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    right: 16px;
    width: min(320px, calc(100vw - 32px));
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(8, 16, 29, 0.98);
    box-shadow: var(--shadow-card);
    flex-direction: column;
    align-items: stretch;
  }
  .site-nav.open { display: flex; }
  .burger { display: inline-flex; }
}
@media (max-width: 640px) {
  html { scroll-behavior: auto; }
  .header-inner {
    min-height: auto;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 14px;
    padding: 14px 0;
  }
  .brand {
    width: 100%;
    align-items: flex-start;
  }
  .brand img { width: 52px; height: 52px; min-width: 52px; }
  .brand-title {
    flex: 1 1 auto;
    min-width: 0;
  }
  .brand-title > span {
    font-size: 17px;
    line-height: 1.1;
    white-space: normal;
    overflow: visible;
    text-overflow: clip;
  }
  .brand-title small {
    margin-top: 6px;
    font-size: 11px;
    line-height: 1.35;
  }
  .nav-wrap {
    width: 100%;
    gap: 10px;
    align-items: stretch;
  }
  .lang-switch {
    flex: 1 1 auto;
    min-width: 0;
  }
  .lang-switch button {
    flex: 1 1 0;
    min-height: 48px;
    padding-inline: 0;
  }
  .print-btn,
  .burger {
    min-height: 48px;
    padding: 10px 14px;
  }
  .site-nav {
    top: calc(100% + 8px);
    right: 0;
    width: 100%;
  }
  .hero-card, .info-card, .section-card, .service-card, .faq-card, .profile-card, .summary-card, .content-card, .contact-copy, .contact-card { padding: var(--space-4); }
  .hero, .resume-hero { padding: 40px 0 40px; }
  .main-sections, .content-grid, .page-contact .hero { padding-bottom: 40px; }
  .krv-contact-title { font-size: 1.55rem; }
  .page-contact .hero-points { grid-template-columns: 1fr; }
  .page-contact .hero-points div:last-child { grid-column: auto; }
  .krv-contact-item { min-height: 52px; padding: 10px 12px; gap: 10px; }
  .krv-contact-icon { width: 20px; height: 20px; flex-basis: 20px; }
  .site-footer {
    padding: 28px 0 32px;
  }
  .footer-box {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    padding-top: 20px;
  }
  .footer-box > div:first-child {
    font-size: 15px;
    line-height: 1.5;
  }
  .footer-links {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }
  .footer-links a {
    width: 100%;
    min-height: 44px;
    justify-content: center;
    padding: 10px 12px;
    text-align: center;
  }
}
@media (max-width: 420px) {
  .footer-links {
    grid-template-columns: 1fr;
  }
}
@media (prefers-reduced-motion: reduce) {
  .marquee-text { animation: none; padding-left: 0; white-space: normal; }
}