:root {
  --bg: #0f1216;
  --panel: #161b22;
  --panel-2: #1c222b;
  --text: #e7ebf0;
  --muted: #98a2b3;
  --line: #262d38;
  --accent: #f0a33c;
  --accent-soft: rgba(240, 163, 60, 0.14);
  --radius: 10px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.62;
}

a { color: var(--accent); text-decoration: none; border-bottom: 1px solid rgba(240, 163, 60, 0.35); }
a:hover { border-bottom-color: var(--accent); }

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 20px;
  background: rgba(15, 18, 22, 0.92);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.brand {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border: 0;
}

.brand b { color: var(--text); font-weight: 600; }

.topbar nav { margin-left: auto; display: flex; align-items: center; gap: 16px; }

.topbar nav a {
  font-size: 14px;
  color: var(--muted);
  border: 0;
}

.topbar nav a:hover, .topbar nav a[aria-current="page"] { color: var(--text); }

.lang {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
}

.lang button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: 600 12px/1 var(--mono);
  letter-spacing: 0.06em;
  padding: 7px 11px;
  cursor: pointer;
}

.lang button[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); }

main { max-width: 760px; margin: 0 auto; padding: 40px 20px 80px; }

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 10px;
}

h1 { font-size: 30px; line-height: 1.2; margin: 0 0 10px; letter-spacing: -0.01em; }

.lead { color: var(--muted); margin: 0 0 6px; }

.meta {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--muted);
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

section.doc {
  margin-top: 34px;
  padding-left: 18px;
  border-left: 2px solid var(--line);
}

section.doc:hover { border-left-color: var(--accent); }

section.doc h2 {
  font-size: 18px;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

section.doc h2 .num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  margin-right: 10px;
}

p { margin: 0 0 12px; }

ul { margin: 0 0 12px; padding-left: 20px; }
li { margin-bottom: 6px; }

.note {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin: 22px 0 0;
}

.note p:last-child { margin-bottom: 0; }

code, .mono { font-family: var(--mono); font-size: 0.92em; color: var(--text); }

.cards { display: grid; gap: 14px; margin-top: 26px; }

@media (min-width: 620px) { .cards { grid-template-columns: 1fr 1fr; } }

.card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  color: var(--text);
}

.card:hover { border-color: var(--accent); }

.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #17130a;
  font-weight: 700;
  border: 0;
  border-radius: 8px;
  padding: 12px 18px;
  cursor: pointer;
  font-size: 15px;
  font-family: inherit;
}

.btn:hover { filter: brightness(1.06); }

.field { margin-bottom: 14px; }

.field label {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}

.field input, .field textarea, .field select {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font: inherit;
  padding: 11px 12px;
}

.field textarea { min-height: 130px; resize: vertical; }

.honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.btn:disabled { opacity: 0.7; cursor: default; }

.status {
  margin: 14px 0 0;
  font-size: 14.5px;
  border-left: 2px solid var(--line);
  padding-left: 12px;
}

.status-ok { border-left-color: #4caf7d; }
.status-error { border-left-color: #e0674f; }

.field input:focus, .field textarea:focus, .field select:focus {
  outline: 0;
  border-color: var(--accent);
}

footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px 60px;
  color: var(--muted);
  font-size: 13.5px;
}

footer hr { border: 0; border-top: 1px solid var(--line); margin: 0 0 18px; }

body [data-l] { display: none; }

body[data-lang="ru"] [data-l="ru"],
body[data-lang="en"] [data-l="en"] { display: block; }

body[data-lang="ru"] .btn[data-l="ru"],
body[data-lang="en"] .btn[data-l="en"] { display: inline-block; }