:root {
  --ink: #111418;
  --text: #3d434b;
  --muted: #8a9099;
  --line: #e6e8eb;
  --bg: #ffffff;
  --blue: #1f63d6;
  --red: #dc2645;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
h1, h2, h3 { color: var(--ink); margin: 0; font-weight: 400; letter-spacing: -.025em; }
h1 { font-size: clamp(2.4rem, 6vw, 4.75rem); line-height: 1.05; font-weight: 300; max-width: 15ch; }
h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); line-height: 1.25; font-weight: 300; max-width: 24ch; margin-bottom: 56px; }
h3 { font-size: 1.05rem; font-weight: 500; letter-spacing: -.01em; line-height: 1.4; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
address { font-style: normal; }

.container { width: 100%; max-width: 1180px; margin: 0 auto; padding-inline: 32px; }

/* Label */
.label {
  font-size: .78rem; font-weight: 500;
  letter-spacing: .08em; text-transform: uppercase;
  color: var(--muted);
}
.label span { color: var(--blue); margin-right: 10px; }

/* Buttons & links */
.btn {
  display: inline-block;
  padding: 14px 28px;
  background: var(--ink); color: #fff;
  font: 500 .92rem/1 "Inter", sans-serif;
  border: 0; border-radius: 0;
  cursor: pointer;
  transition: background .2s;
}
.btn:hover { background: var(--blue); }
.btn:disabled { opacity: .5; cursor: default; }
.link-arrow { font-size: .92rem; font-weight: 500; color: var(--ink); border-bottom: 1px solid var(--ink); padding-bottom: 2px; transition: color .2s, border-color .2s; }
.link-arrow::after { content: " \2192"; }
.link-arrow:hover { color: var(--blue); border-color: var(--blue); }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.site-header.scrolled { border-color: var(--line); }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }

.logo { display: inline-flex; align-items: center; gap: 10px; }
.logo-img { width: 38px; height: auto; display: block; }
.logo-text { display: flex; flex-direction: column; font-family: "Montserrat", "Inter", sans-serif; line-height: 1.05; }
.logo-name { font-weight: 700; font-size: 1.02rem; color: var(--blue); letter-spacing: .01em; }
.logo-sub { font-weight: 600; font-size: .55rem; color: var(--red); letter-spacing: .17em; margin-top: 3px; }

.main-nav { display: flex; gap: 36px; }
.main-nav a { font-size: .9rem; color: var(--text); transition: color .2s; }
.main-nav a:hover, .main-nav a.active { color: var(--blue); }

.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 1.5px; background: var(--ink); margin: 5px 0; transition: transform .25s, opacity .25s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Hero */
.hero { padding-block: 120px 128px; }
.hero .label { margin-bottom: 32px; }
.hero-foot {
  display: flex; justify-content: space-between; align-items: flex-end; flex-wrap: wrap; gap: 32px;
  margin-top: 64px; padding-top: 32px; border-top: 1px solid var(--line);
}
.lead { max-width: 520px; font-size: 1.05rem; }
.hero-actions { display: flex; align-items: center; gap: 28px; }

/* Sections */
.section { padding-block: 104px; border-top: 1px solid var(--line); }
.split { display: grid; grid-template-columns: 220px 1fr; gap: 32px; }
.split > .label { padding-top: 10px; }

.cols-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.values { list-style: none; padding: 0; margin: 48px 0 0; display: flex; flex-wrap: wrap; gap: 12px 40px; }
.values li { color: var(--ink); font-weight: 500; }
.values li::before { content: ""; display: inline-block; width: 6px; height: 6px; background: var(--blue); border-radius: 50%; margin-right: 12px; vertical-align: middle; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; column-gap: 56px; }
.item { padding-block: 28px; border-top: 1px solid var(--line); }
.item h3 { margin-bottom: 8px; }
.item p { font-size: .95rem; }

/* Equipment rows */
.rows { list-style: none; padding: 0; margin: 0; border-bottom: 1px solid var(--line); }
.rows li {
  display: grid; grid-template-columns: 90px 1fr 1.3fr; gap: 24px; align-items: baseline;
  padding-block: 28px; border-top: 1px solid var(--line);
}
.row-key { font-size: .75rem; font-weight: 600; letter-spacing: .08em; color: var(--blue); }
.row-title small { display: block; color: var(--muted); font-size: .85rem; margin-top: 2px; }
.rows p { font-size: .95rem; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 64px; }
.contact-details { margin: 0; }
.contact-details dt { font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.contact-details dd { margin: 4px 0 28px; color: var(--ink); line-height: 1.6; }
.contact-details a { border-bottom: 1px solid var(--line); transition: border-color .2s, color .2s; }
.contact-details a:hover { color: var(--blue); border-color: var(--blue); }

.contact-form { display: grid; gap: 28px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.contact-form label { display: grid; gap: 4px; font-size: .78rem; color: var(--muted); letter-spacing: .02em; }
.contact-form input, .contact-form select, .contact-form textarea {
  width: 100%; font: 400 1rem "Inter", sans-serif; color: var(--ink);
  padding: 8px 0; border: 0; border-bottom: 1px solid #cfd3d8; border-radius: 0;
  background: transparent; transition: border-color .2s;
}
.contact-form select {
  appearance: none; -webkit-appearance: none; cursor: pointer;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%238a9099'/%3E%3C/svg%3E") no-repeat right 4px center;
}
.contact-form textarea { resize: vertical; min-height: 96px; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { outline: none; border-color: var(--blue); }
.contact-form .invalid { border-color: var(--red); }
.form-foot { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; }
.form-status { font-size: .9rem; }
.form-status.success { color: var(--blue); }
.form-status.error { color: var(--red); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding-top: 56px; font-size: .88rem; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 32px; align-items: start; padding-bottom: 48px; }
.footer-links { display: grid; gap: 4px; }
.footer-links a:hover { color: var(--blue); }
.footer-bottom { padding-block: 24px; border-top: 1px solid var(--line); color: var(--muted); font-size: .8rem; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

/* Responsive */
@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .main-nav {
    position: absolute; top: 72px; left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 0 32px 16px; display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 14px 0; border-top: 1px solid var(--line); }

  .split { grid-template-columns: 1fr; gap: 20px; }
  .split > .label { padding-top: 0; }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .rows li { grid-template-columns: 70px 1fr; }
  .rows li p { grid-column: 2; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid .logo { grid-column: 1 / -1; }
}

@media (max-width: 600px) {
  .container { padding-inline: 20px; }
  .main-nav { padding-inline: 20px; }
  .hero { padding-block: 72px 80px; }
  .hero-foot { margin-top: 48px; }
  .section { padding-block: 72px; }
  h2 { margin-bottom: 40px; }
  .cols-2, .grid-2, .form-row, .footer-grid { grid-template-columns: 1fr; }
  .cols-2 { gap: 16px; }
  .rows li { grid-template-columns: 1fr; gap: 6px; }
  .rows li p { grid-column: auto; }
}