:root {
  --fog: #f4f6f8;
  --paper: #ffffff;
  --ink: #0f1720;
  --river: #0f766e;
  --river-2: #115e59;
  --stone: #64748b;
  --line: #dbe3ea;
  --ok: #0f766e;
  --err: #b42318;
  --sans: "Sora", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--fog);
  color: var(--ink);
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font-family: inherit; }

.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 36px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 30;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -.04em;
  font-size: 22px;
}
.brand em { font-style: normal; color: var(--river); }
.nav { display: flex; gap: 20px; font-size: 14px; color: var(--stone); }
.nav a:hover { color: var(--ink); }
.lang { display: flex; background: var(--fog); border-radius: 999px; overflow: hidden; }
.lang button { border: 0; background: transparent; padding: 7px 12px; cursor: pointer; font-size: 12px; font-weight: 700; color: var(--stone); }
.lang button.on { background: var(--ink); color: #fff; }
.burger { display: none; border: 0; background: var(--ink); color: #fff; width: 40px; height: 40px; border-radius: 10px; cursor: pointer; }

.hero {
  padding: 72px 36px 48px;
  display: grid;
  grid-template-columns: 1.3fr .7fr;
  gap: 40px;
  align-items: end;
  position: relative;
  overflow: hidden;
}
.hero:before {
  content: "УЖ";
  position: absolute;
  right: -20px;
  top: -40px;
  font-size: 280px;
  font-weight: 800;
  letter-spacing: -.08em;
  color: rgba(15,118,110,.08);
  pointer-events: none;
}
.kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--river);
  margin-bottom: 16px;
}
.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  line-height: .98;
  letter-spacing: -.05em;
  font-weight: 700;
  max-width: 14ch;
}
.hero p { margin: 20px 0 28px; max-width: 54ch; color: var(--stone); font-size: 18px; }
.status {
  background: var(--ink);
  color: #dbe7e6;
  padding: 24px;
  border-radius: 18px;
  font-family: var(--mono);
  font-size: 13px;
}
.status b { color: #5eead4; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 20px; border-radius: 999px; font-weight: 700; cursor: pointer; border: 0; font-size: 14px;
}
.btn-fill { background: var(--river); color: #fff; }
.btn-line { background: transparent; border: 1px solid var(--ink); margin-left: 8px; }

.flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--line);
  border-block: 1px solid var(--line);
}
.flow div { background: var(--paper); padding: 20px 16px; }
.flow b { display: block; font-family: var(--mono); color: var(--river); margin-bottom: 6px; font-size: 12px; }

section { padding: 72px 36px 0; }
section h2 { font-size: clamp(28px, 3.5vw, 40px); letter-spacing: -.04em; margin-bottom: 10px; }
.lead { color: var(--stone); max-width: 68ch; margin-bottom: 28px; }

.stack { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 24px;
}
.card h3 { font-size: 22px; margin-bottom: 8px; letter-spacing: -.03em; }
.card p { color: var(--stone); }
.card ul { margin: 12px 0 0 18px; }

.rack {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 8px 16px;
  background: var(--ink);
  color: #dbe7e6;
  border-radius: 20px;
  padding: 24px;
  font-family: var(--mono);
  font-size: 13px;
}
.led { width: 10px; height: 10px; border-radius: 50%; background: #5eead4; display: inline-block; margin-right: 8px; }
.led.warn { background: #fbbf24; }

.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.faq details { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; margin-bottom: 8px; }
.faq summary { cursor: pointer; font-weight: 700; }
.faq p { color: var(--stone); margin-top: 8px; }

.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding-bottom: 72px; }
.form { display: grid; gap: 10px; }
.form input, .form textarea, .form select {
  border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; background: #fff;
}
.form textarea { min-height: 120px; }
.note { min-height: 20px; font-size: 14px; }
.note.ok { color: var(--ok); }
.note.err { color: var(--err); }

footer {
  margin-top: 24px;
  padding: 24px 36px 32px;
  color: var(--stone);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
}

@media (max-width: 980px) {
  .nav { display: none; position: absolute; left: 0; right: 0; top: 64px; background: #fff; flex-direction: column; padding: 16px; border-bottom: 1px solid var(--line); }
  .nav.open { display: flex; }
  .burger { display: block; }
  .hero, .flow, .stack, .row2, .contact, .rack { grid-template-columns: 1fr; }
  .hero, section, .bar, footer { padding-left: 18px; padding-right: 18px; }
}