:root {
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --text: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --card: #ffffff;
  --shadow: 0 20px 60px rgba(15, 23, 42, 0.10);
  --radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
p { margin: 0 0 1rem; }
h1, h2, h3 { margin: 0; line-height: 1.12; letter-spacing: -0.03em; }
h1 { font-size: clamp(2.4rem, 6vw, 5.2rem); }
h2 { font-size: clamp(2rem, 4vw, 3.3rem); }
h3 { font-size: 1.25rem; }

.container {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}
.logo-mark {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  color: #fff;
  background: var(--text);
}
.logo-text { white-space: nowrap; }
.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.95rem;
}
.site-nav a:hover { color: var(--text); }
.nav-toggle { display: none; }

.hero {
  padding: 88px 0 72px;
  background:
    radial-gradient(circle at 80% 20%, rgba(37, 99, 235, 0.16), transparent 34%),
    linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) 0.75fr;
  gap: 48px;
  align-items: center;
}
.eyebrow {
  margin: 0 0 14px;
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.hero-text {
  max-width: 720px;
  margin-top: 24px;
  color: #334155;
  font-size: 1.18rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 34px 0 26px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  border: 1px solid transparent;
}
.btn-primary {
  color: #fff;
  background: var(--primary);
  box-shadow: 0 12px 26px rgba(37, 99, 235, 0.25);
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary {
  background: #fff;
  border-color: var(--line);
}
.btn-secondary:hover { border-color: #94a3b8; }
.hero-points {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: #334155;
}
.hero-points li::before {
  content: "✓";
  margin-right: 10px;
  color: var(--primary);
  font-weight: 900;
}
.supplier-card {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
}
.card-label {
  display: inline-block;
  margin-bottom: 16px;
  padding: 5px 10px;
  border-radius: 999px;
  background: #dbeafe;
  color: #1e40af;
  font-size: 0.8rem;
  font-weight: 800;
}
.supplier-card h2 { font-size: 1.5rem; margin-bottom: 18px; }
dl { margin: 0; }
dl div {
  padding: 14px 0;
  border-top: 1px solid var(--line);
}
dt {
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
dd { margin: 4px 0 0; font-weight: 700; }
.muted { color: var(--muted); font-size: 0.95rem; }

.section { padding: 88px 0; }
.section.alt { background: var(--bg-alt); }
.section-heading {
  max-width: 760px;
  margin-bottom: 36px;
}
.section-heading p:not(.eyebrow) { color: var(--muted); font-size: 1.05rem; margin-top: 16px; }
.cards {
  display: grid;
  gap: 20px;
}
.cards.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cards.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card, .case-card, .contact-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
}
.card p, .case-card p { color: var(--muted); margin-top: 14px; }
.card:hover, .case-card:hover { box-shadow: 0 16px 40px rgba(15, 23, 42, 0.08); }

.procurement-grid,
.docs-grid,
.contacts-grid,
.support-box {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: start;
}
.procurement-grid p,
.docs-grid p,
.contacts-grid p { color: var(--muted); font-size: 1.05rem; margin-top: 18px; }
.checklist {
  display: grid;
  gap: 12px;
}
.check-item {
  padding: 18px 18px 18px 48px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  position: relative;
  font-weight: 700;
}
.check-item::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 21px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: inset 0 0 0 5px #dbeafe;
}
.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.tech-list span {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: #334155;
  font-weight: 700;
}
.case-topline {
  margin-bottom: 14px;
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.requisites-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}
.requisites-card h3 { margin-bottom: 12px; }
.requisites-card dd { word-break: break-word; }
.contact-note {
  display: block;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  color: #cbd5e1;
  font-weight: 700;
}

.docs-list {
  display: grid;
  gap: 12px;
}
.docs-list a {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  font-weight: 700;
}
.docs-list a:hover { border-color: var(--primary); }
.steps {
  display: grid;
  gap: 14px;
}
.steps div {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 16px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}
.steps span {
  color: var(--primary);
  font-weight: 900;
}
.steps p { margin: 0; color: #334155; }
.contacts { background: #0f172a; color: #fff; }
.contacts .eyebrow { color: #93c5fd; }
.contacts p { color: #cbd5e1; }
.contact-card {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.14);
}
.contact-link {
  display: block;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 1.2rem;
  font-weight: 800;
}
.contact-link:hover { color: #bfdbfe; }
.site-footer {
  padding: 26px 0;
  background: #020617;
  color: #cbd5e1;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
}
.footer-inner p { margin: 0; }
.footer-inner a { color: #fff; font-weight: 700; }

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 40px;
    padding: 0 14px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: #fff;
    font-weight: 800;
    color: var(--text);
  }
  .site-nav {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 68px;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #fff;
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: stretch;
  }
  .site-nav.is-open { display: flex; }
  .hero { padding-top: 56px; }
  .hero-grid,
  .procurement-grid,
  .docs-grid,
  .contacts-grid,
  .support-box { grid-template-columns: 1fr; }
  .cards.three,
  .cards.two { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 520px) {
  .container { width: min(100% - 24px, 1160px); }
  .logo-text { display: none; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; }
  .supplier-card, .card, .case-card, .contact-card { padding: 22px; }
}