/* ══════════════════════════════════════════════════════════════
   Лаборатория ботов — design system
   Aesthetic: dark laboratory bench · acid-lime signal · blueprint grid
   ══════════════════════════════════════════════════════════════ */

:root {
  /* base */
  --ink: #08090b;
  --ink-2: #0b0d11;
  --panel: #0f1216;
  --panel-2: #14181e;
  --fg: #f1f4ee;
  --muted: #9aa2ac;
  --muted-2: #8b93a0; /* WCAG AA ≥4.5:1 on all surface tokens */
  --line: rgba(240, 244, 238, 0.08);
  --line-2: rgba(240, 244, 238, 0.14);

  /* signature accent */
  --acid: #c6f24e;
  --acid-deep: #a8db31;
  --acid-dim: rgba(198, 242, 78, 0.14);
  --acid-glow: rgba(198, 242, 78, 0.35);

  /* platform tones */
  --tg: #4ab3e6; /* Telegram brand cue */

  /* status */
  --ok: #6fe28a;
  --red: #ff5d5d;

  /* type */
  --display: "Unbounded", "Manrope", system-ui, sans-serif;
  --sans: "Manrope", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", monospace;

  /* metrics */
  --wrap: 1200px;
  --radius: 16px;
  --radius-sm: 10px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
:where(section[id], main[id]) { scroll-margin-top: 74px; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body::before {
  /* faint blueprint grid over the whole page */
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 90%);
  opacity: 0.5;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }
.mono { font-family: var(--mono); }

.accent { color: var(--acid); }

::selection { background: var(--acid); color: var(--ink); }

/* focus */
:focus-visible {
  outline: 2px solid var(--acid);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: fixed;
  top: -100px; left: 16px; z-index: 200;
  background: var(--acid); color: var(--ink);
  padding: 10px 16px; border-radius: 8px; font-weight: 700;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 16px; }

/* ── Buttons ─────────────────────────────────────────── */
.btn {
  --btn-pad-y: 15px;
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-family: var(--sans); font-weight: 700; font-size: 0.98rem;
  padding: var(--btn-pad-y) 26px;
  border-radius: 999px; border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.18s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  white-space: nowrap;
}
.btn-sm { --btn-pad-y: 10px; padding: 10px 20px; font-size: 0.92rem; }
.btn-primary {
  background: var(--acid); color: var(--ink);
  box-shadow: 0 0 0 rgba(198, 242, 78, 0);
}
.btn-primary:hover {
  background: #d3fb63;
  transform: translateY(-2px);
  box-shadow: 0 12px 34px -12px var(--acid-glow);
}
.btn-ghost {
  background: transparent; color: var(--fg);
  border-color: var(--line-2);
}
.btn-ghost:hover { border-color: var(--acid); color: var(--acid); transform: translateY(-2px); }
.btn-block { width: 100%; }
.btn-arrow { transition: transform 0.2s var(--ease); }
.btn:hover .btn-arrow { transform: translateX(3px); }

/* ── Header ──────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--ink) 72%, transparent);
  backdrop-filter: blur(14px) saturate(1.3);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.site-header.scrolled { border-bottom-color: var(--line); background: color-mix(in srgb, var(--ink) 88%, transparent); }
.header-inner { display: flex; align-items: center; gap: 24px; height: 70px; }

.brand { display: inline-flex; align-items: center; gap: 11px; font-family: var(--display); font-weight: 700; font-size: 1.02rem; letter-spacing: -0.02em; }
.brand-mark { color: var(--acid); display: grid; place-items: center; transition: transform 0.4s var(--ease); }
.brand:hover .brand-mark { transform: rotate(60deg); }
.brand-text { color: var(--fg); }

.nav { display: flex; gap: 6px; margin-left: auto; }
.nav a {
  padding: 8px 14px; border-radius: 8px; color: var(--muted);
  font-weight: 600; font-size: 0.94rem;
  transition: color 0.18s var(--ease), background 0.18s var(--ease);
}
.nav a:hover { color: var(--fg); background: var(--acid-dim); }
.header-cta { display: flex; }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px; justify-content: center;
  width: 44px; height: 44px; background: none; border: 1px solid var(--line-2); border-radius: 10px; cursor: pointer; margin-left: auto;
}
.nav-toggle span { width: 18px; height: 2px; background: var(--fg); margin: 0 auto; border-radius: 2px; transition: transform 0.25s var(--ease), opacity 0.2s var(--ease); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav { display: none; flex-direction: column; gap: 4px; padding: 12px 24px 22px; border-bottom: 1px solid var(--line); background: var(--ink-2); }
.mobile-nav a { padding: 13px 12px; border-radius: 10px; color: var(--fg); font-weight: 600; border-bottom: 1px solid var(--line); }
.mobile-nav a:last-child { border-bottom: none; margin-top: 8px; justify-content: center; }
.mobile-nav .btn { border-bottom: none; }

/* ── Section scaffolding ─────────────────────────────── */
.section { padding: clamp(72px, 9vw, 130px) 0; position: relative; }
.section-head { max-width: 720px; margin-bottom: clamp(38px, 5vw, 60px); }
.section-tag { color: var(--acid); font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase; margin: 0 0 16px; font-weight: 500; }
.section-title {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(1.9rem, 4.2vw, 3rem);
  line-height: 1.08; letter-spacing: -0.03em; margin: 0 0 18px;
}
.section-lead { color: var(--muted); font-size: clamp(1rem, 1.6vw, 1.18rem); margin: 0; max-width: 60ch; }

/* ── Hero ────────────────────────────────────────────── */
.hero { position: relative; padding: clamp(52px, 8vw, 96px) 0 clamp(56px, 7vw, 90px); overflow: hidden; }
.hero-grid-bg {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--line-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-2) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(120% 80% at 20% 10%, #000, transparent 70%);
  opacity: 0.4;
}
.hero-glow {
  position: absolute; z-index: 0; pointer-events: none;
  width: 720px; height: 720px; top: -280px; right: -180px;
  background: radial-gradient(circle, var(--acid-glow), transparent 62%);
  filter: blur(30px); opacity: 0.5;
}
.hero-inner { display: flex; flex-direction: column; gap: clamp(34px, 5vw, 58px); }
.hero-head { max-width: 1160px; }
.hero-body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 460px); gap: clamp(32px, 4vw, 60px); align-items: center; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 0.82rem; color: var(--muted);
  padding: 7px 14px; border: 1px solid var(--line-2); border-radius: 999px; margin: 0 0 26px;
  background: rgba(255,255,255,0.02);
}
.eyebrow-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--acid); box-shadow: 0 0 0 0 var(--acid-glow); animation: pulse 2.4s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 var(--acid-glow); } 70% { box-shadow: 0 0 0 9px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }

.hero-title {
  font-family: var(--display); font-weight: 800;
  font-size: clamp(1.7rem, 7.6vw, 4.5rem);
  line-height: 1.04; letter-spacing: -0.045em; margin: 0;
  overflow-wrap: break-word; hyphens: none;
}
.hero-title .accent { position: relative; }
.max-word {
  padding: 0 0.12em; border-radius: 8px;
  background: linear-gradient(120deg, var(--acid), var(--acid-deep));
  color: var(--ink); -webkit-text-fill-color: var(--ink);
}
.hero-sub { color: var(--muted); font-size: clamp(1.02rem, 1.7vw, 1.24rem); max-width: 54ch; margin: 0 0 34px; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 44px; }

.hero-meta { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin: 0; padding: 28px 0 0; border-top: 1px solid var(--line); }
.hero-meta b { display: block; font-family: var(--display); font-weight: 700; font-size: clamp(1.1rem, 2vw, 1.4rem); letter-spacing: -0.02em; }
.hero-meta span { display: block; color: var(--muted-2); font-size: 0.85rem; line-height: 1.4; margin-top: 6px; }

/* ── Bridge diagram (signature) ──────────────────────── */
.bridge {
  background: linear-gradient(180deg, var(--panel), var(--ink-2));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; position: relative;
  box-shadow: 0 40px 90px -50px rgba(0,0,0,0.9), inset 0 1px 0 rgba(255,255,255,0.03);
}
.bridge::after {
  /* corner crop-marks */
  content: ""; position: absolute; inset: 10px; border-radius: 10px; pointer-events: none;
  background:
    linear-gradient(var(--acid),var(--acid)) 0 0/14px 1.5px no-repeat,
    linear-gradient(var(--acid),var(--acid)) 0 0/1.5px 14px no-repeat,
    linear-gradient(var(--acid),var(--acid)) 100% 0/14px 1.5px no-repeat,
    linear-gradient(var(--acid),var(--acid)) 100% 0/1.5px 14px no-repeat,
    linear-gradient(var(--acid),var(--acid)) 0 100%/14px 1.5px no-repeat,
    linear-gradient(var(--acid),var(--acid)) 0 100%/1.5px 14px no-repeat,
    linear-gradient(var(--acid),var(--acid)) 100% 100%/14px 1.5px no-repeat,
    linear-gradient(var(--acid),var(--acid)) 100% 100%/1.5px 14px no-repeat;
  opacity: 0.5;
}
.bridge-label { color: var(--muted-2); font-size: 0.74rem; letter-spacing: 0.04em; margin-bottom: 26px; }
.bridge-track { display: grid; grid-template-columns: auto 1fr auto 1fr auto; align-items: center; gap: 4px; }

.node { display: flex; flex-direction: column; align-items: center; gap: 10px; text-align: center; position: relative; }
.node-glyph {
  width: 58px; height: 58px; display: grid; place-items: center; border-radius: 16px;
  border: 1px solid var(--line-2); background: var(--panel-2); color: var(--tg);
}
.node-glyph--tg { background: transparent; border: none; padding: 0; overflow: hidden; box-shadow: 0 8px 22px -10px rgba(42, 171, 238, 0.7); }
.node-glyph--tg svg { width: 100%; height: 100%; display: block; }
.node-glyph--max { background: transparent; border: none; padding: 0; overflow: hidden; box-shadow: 0 8px 22px -10px rgba(88, 54, 238, 0.75); }
.node-glyph--max svg { width: 100%; height: 100%; display: block; }
.node-name { font-size: 0.72rem; color: var(--muted); letter-spacing: 0.02em; }

.node-core .core-glyph { color: var(--acid); border-color: var(--acid); background: var(--acid-dim); width: 66px; height: 66px; }
.core-ring { position: absolute; top: -4px; left: 50%; width: 66px; height: 66px; transform: translateX(-50%); border: 1px solid var(--acid); border-radius: 20px; opacity: 0; animation: ring 3s var(--ease) infinite; }
.core-ring-2 { animation-delay: 1.5s; }
@keyframes ring { 0% { transform: translateX(-50%) scale(0.8); opacity: 0.7; } 100% { transform: translateX(-50%) scale(1.5); opacity: 0; } }

.bridge-wire { position: relative; height: 60px; }
.wire-svg { width: 100%; height: 100%; }
.wire-base { fill: none; stroke: var(--line-2); stroke-width: 2; stroke-dasharray: 4 5; }
.wire-live { fill: none; stroke: var(--acid); stroke-width: 2; stroke-dasharray: 14 186; animation: flow 2.6s linear infinite; filter: drop-shadow(0 0 5px var(--acid-glow)); }
.wire-live--warm { animation-delay: 1.3s; }
@keyframes flow { from { stroke-dashoffset: 200; } to { stroke-dashoffset: 0; } }

.packet { position: absolute; top: 50%; width: 7px; height: 7px; border-radius: 50%; background: var(--acid); margin-top: -3.5px; box-shadow: 0 0 8px var(--acid-glow); animation: travel 2.6s linear infinite; }
.packet-1 { animation-delay: 0s; } .packet-2 { animation-delay: 0.9s; } .packet-3 { animation-delay: 1.8s; }
.packet-4 { animation-delay: 0.4s; } .packet-5 { animation-delay: 1.5s; }
@keyframes travel { from { left: -4px; opacity: 0; } 10% { opacity: 1; } 90% { opacity: 1; } to { left: calc(100% + 4px); opacity: 0; } }

.bridge-readout { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 26px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 0.76rem; color: var(--muted); }
.bridge-readout span { display: inline-flex; align-items: center; gap: 7px; }
.bridge-readout i { width: 6px; height: 6px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 6px rgba(111,226,138,0.5); }
.bridge-readout b { color: var(--ok); font-weight: 500; }

/* ── Stats ───────────────────────────────────────────── */
.stats { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--ink-2); }
.stats-inner { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; }
.stat { padding: clamp(30px, 4vw, 48px) 20px; text-align: left; position: relative; }
.stat + .stat::before { content: ""; position: absolute; left: -0.5px; top: 22%; bottom: 22%; width: 1px; background: var(--line); }
.stat-num { font-family: var(--display); font-weight: 700; font-size: clamp(2rem, 4.4vw, 3.1rem); letter-spacing: -0.03em; color: var(--fg); }
.stat-plus { font-family: var(--display); font-weight: 700; font-size: clamp(1.3rem, 2.4vw, 1.8rem); color: var(--acid); vertical-align: top; }
.stat p { color: var(--muted); font-size: 0.9rem; margin: 8px 0 0; max-width: 24ch; }

/* ── Cards (services) ────────────────────────────────── */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  position: relative; padding: 30px 26px 28px; border-radius: var(--radius);
  background: var(--panel); border: 1px solid var(--line);
  transition: transform 0.28s var(--ease), border-color 0.28s var(--ease), background 0.28s var(--ease);
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: linear-gradient(160deg, var(--acid-glow), transparent 40%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity 0.3s var(--ease);
}
.card:hover { transform: translateY(-5px); border-color: var(--line-2); background: var(--panel-2); }
.card:hover::before { opacity: 1; }
.card-num { position: absolute; top: 22px; right: 24px; color: var(--muted-2); font-size: 0.82rem; }
.card-ico { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 12px; background: var(--acid-dim); color: var(--acid); margin-bottom: 22px; transition: transform 0.28s var(--ease); }
.card:hover .card-ico { transform: translateY(-2px) rotate(-4deg); }
.card h3 { font-family: var(--sans); font-weight: 700; font-size: 1.16rem; letter-spacing: -0.015em; margin: 0 0 10px; }
.card p { color: var(--muted); font-size: 0.95rem; margin: 0; }
.card-featured { background: linear-gradient(165deg, rgba(198,242,78,0.08), var(--panel) 55%); border-color: rgba(198,242,78,0.28); }
.card-featured .card-ico { background: var(--acid); color: var(--ink); }
.card-flag { display: inline-block; margin-top: 16px; font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--acid); border: 1px solid rgba(198,242,78,0.35); border-radius: 999px; padding: 4px 11px; }

/* ── MAX migration ───────────────────────────────────── */
.section-max { background: var(--ink-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.max-inner { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 5vw, 72px); align-items: center; }
.check-list { list-style: none; padding: 0; margin: 30px 0 34px; display: grid; gap: 15px; }
.check-list li { display: flex; gap: 14px; align-items: flex-start; color: var(--fg); font-size: 1.02rem; }
.check { flex: 0 0 auto; width: 24px; height: 24px; margin-top: 2px; border-radius: 7px; background: var(--acid-dim); position: relative; }
.check::after { content: ""; position: absolute; left: 8px; top: 5px; width: 6px; height: 11px; border: solid var(--acid); border-width: 0 2px 2px 0; transform: rotate(42deg); }

.max-panel { background: var(--panel); border: 1px solid var(--line-2); border-radius: var(--radius); overflow: hidden; box-shadow: 0 40px 90px -55px rgba(0,0,0,0.9); }
.panel-head { display: flex; align-items: center; gap: 10px; padding: 14px 18px; border-bottom: 1px solid var(--line); background: var(--panel-2); }
.panel-head .dot-live { width: 9px; height: 9px; border-radius: 50%; background: var(--acid); box-shadow: 0 0 0 0 var(--acid-glow); animation: pulse 2.4s infinite; }
.panel-file { color: var(--fg); font-size: 0.8rem; }
.panel-status { margin-left: auto; color: var(--ok); font-size: 0.72rem; display: inline-flex; align-items: center; gap: 6px; }
.panel-status::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 6px rgba(111,226,138,0.5); }
.panel-body { padding: 10px 6px; }
.migrow { display: grid; grid-template-columns: 108px 1fr; gap: 14px; align-items: center; padding: 13px 16px; border-radius: 10px; transition: background 0.2s var(--ease); }
.migrow:hover { background: var(--acid-dim); }
.migkey { color: var(--acid); font-size: 0.82rem; }
.migval { color: var(--muted); font-size: 0.92rem; }
.migrow-ok .migkey { color: var(--ok); }

/* ── Process ─────────────────────────────────────────── */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
.step { position: relative; padding: 30px 24px 28px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--line); transition: transform 0.28s var(--ease), border-color 0.28s var(--ease); }
.step:hover { transform: translateY(-4px); border-color: var(--line-2); }
.step-num { font-family: var(--display); font-weight: 700; font-size: 2.4rem; letter-spacing: -0.04em; color: transparent; -webkit-text-stroke: 1.4px var(--acid); display: block; margin-bottom: 16px; }
.step h3 { font-family: var(--sans); font-weight: 700; font-size: 1.08rem; letter-spacing: -0.015em; margin: 0 0 9px; }
.step p { color: var(--muted); font-size: 0.92rem; margin: 0; }
.step::after { content: ""; position: absolute; top: 46px; right: -12px; width: 24px; height: 1px; background: var(--line-2); z-index: 2; }
.step:last-child::after { display: none; }

/* ── Cases ───────────────────────────────────────────── */
.section-cases { background: var(--ink-2); border-top: 1px solid var(--line); }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.case { padding: 28px 26px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--line); transition: transform 0.28s var(--ease), border-color 0.28s var(--ease); }
.case:hover { transform: translateY(-5px); border-color: var(--line-2); }
.case-tag { display: inline-block; font-size: 0.72rem; letter-spacing: 0.05em; color: var(--acid); text-transform: uppercase; margin-bottom: 16px; padding: 5px 11px; border: 1px solid var(--line-2); border-radius: 999px; }
.case h3 { font-family: var(--sans); font-weight: 700; font-size: 1.18rem; letter-spacing: -0.015em; margin: 0 0 10px; }
.case p { color: var(--muted); font-size: 0.94rem; margin: 0 0 22px; }
.case-stat { list-style: none; display: flex; gap: 26px; padding: 18px 0 0; margin: 0; border-top: 1px solid var(--line); }
.case-stat b { display: block; font-family: var(--display); font-weight: 700; font-size: 1.32rem; letter-spacing: -0.02em; color: var(--acid); }
.case-stat span { display: block; color: var(--muted-2); font-size: 0.78rem; margin-top: 4px; }

/* ── Tech marquee ────────────────────────────────────── */
.tech { padding: 40px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); overflow: hidden; }
.tech-label { max-width: var(--wrap); margin: 0 auto 22px; padding: 0 24px; color: var(--acid); font-size: 0.78rem; letter-spacing: 0.06em; text-transform: uppercase; }
.marquee { position: relative; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee-track { display: inline-flex; align-items: center; gap: 20px; white-space: nowrap; animation: marquee 34s linear infinite; will-change: transform; }
.marquee-track span { font-family: var(--display); font-weight: 600; font-size: clamp(1.1rem, 2.4vw, 1.7rem); color: var(--fg); letter-spacing: -0.02em; }
.marquee-track i { color: var(--acid); font-style: normal; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ── FAQ ─────────────────────────────────────────────── */
.faq-wrap { max-width: 860px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 18px;
  padding: 24px 4px; font-family: var(--sans); font-weight: 700; font-size: clamp(1.02rem, 1.8vw, 1.22rem); letter-spacing: -0.015em;
  transition: color 0.2s var(--ease);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--acid); }
.faq-plus { position: relative; flex: 0 0 auto; width: 22px; height: 22px; }
.faq-plus::before, .faq-plus::after { content: ""; position: absolute; background: var(--acid); border-radius: 2px; transition: transform 0.28s var(--ease); }
.faq-plus::before { top: 10px; left: 2px; width: 18px; height: 2px; }
.faq-plus::after { top: 2px; left: 10px; width: 2px; height: 18px; }
.faq-item[open] .faq-plus::after { transform: rotate(90deg); opacity: 0; }
.faq-body { overflow: hidden; }
.faq-body p { color: var(--muted); margin: 0 0 24px; max-width: 68ch; font-size: 1rem; }
.faq-item[open] .faq-body { animation: faqopen 0.35s var(--ease); }
@keyframes faqopen { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: translateY(0); } }

/* ── Contact ─────────────────────────────────────────── */
.section-contact { position: relative; overflow: hidden; border-top: 1px solid var(--line); }
.contact-glow { width: 640px; height: 640px; top: auto; bottom: -320px; left: -160px; right: auto; opacity: 0.4; }
.contact-inner { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 5vw, 72px); align-items: start; }
.contact-list { list-style: none; padding: 0; margin: 30px 0 0; display: grid; gap: 14px; }
.contact-list li { display: flex; align-items: center; gap: 14px; }
.contact-ico { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 11px; background: var(--acid-dim); color: var(--acid); font-size: 0.9rem; font-weight: 700; }
.contact-list a { font-family: var(--sans); font-weight: 700; font-size: 1.08rem; letter-spacing: -0.015em; transition: color 0.2s var(--ease); }
.contact-list a:hover { color: var(--acid); }

.contact-form { background: var(--panel); border: 1px solid var(--line-2); border-radius: var(--radius); padding: clamp(24px, 3vw, 34px); position: relative; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 0.9rem; font-weight: 600; color: var(--fg); margin-bottom: 8px; }
.req { color: var(--acid); }
.field input, .field select, .field textarea {
  width: 100%; font-family: var(--sans); font-size: 1rem; color: var(--fg);
  background: var(--ink-2); border: 1px solid var(--line-2); border-radius: var(--radius-sm);
  padding: 13px 15px; transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.field textarea { resize: vertical; min-height: 84px; }
.field input::placeholder, .field textarea::placeholder { color: var(--muted-2); }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--acid); box-shadow: 0 0 0 3px var(--acid-dim); }
.field select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%239aa2ac' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 15px center; padding-right: 42px; }
.field-error { color: var(--red); font-size: 0.82rem; margin: 8px 0 0; }
.field input[aria-invalid="true"] { border-color: var(--red); }
.form-note { color: var(--muted-2); font-size: 0.74rem; margin: 14px 0 0; line-height: 1.5; }
/* Honeypot: убираем из вида, но оставляем в DOM (боты заполняют) */
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; opacity: 0; pointer-events: none; }

.form-success { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; text-align: center; padding: 30px; background: var(--panel); border-radius: var(--radius); animation: faqopen 0.4s var(--ease); }
.form-success:focus { outline: none; }
.form-success b { font-family: var(--display); font-size: 1.3rem; }
.form-success span { color: var(--muted); }
.success-mark { width: 58px; height: 58px; border-radius: 50%; background: var(--acid-dim); position: relative; margin-bottom: 8px; }
.success-mark::after { content: ""; position: absolute; left: 21px; top: 15px; width: 11px; height: 22px; border: solid var(--acid); border-width: 0 3px 3px 0; transform: rotate(42deg); }

/* ── Footer ──────────────────────────────────────────── */
.site-footer { border-top: 1px solid var(--line); background: var(--ink-2); padding: clamp(46px, 6vw, 72px) 0 26px; }
.footer-inner { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 36px; padding-bottom: 40px; border-bottom: 1px solid var(--line); }
.footer-tagline { color: var(--muted); font-size: 0.95rem; margin: 16px 0 0; max-width: 34ch; }
.footer-nav, .footer-contacts { display: flex; flex-direction: column; gap: 12px; }
.footer-nav a, .footer-contacts a { color: var(--muted); font-weight: 600; font-size: 0.95rem; transition: color 0.2s var(--ease); width: fit-content; }
.footer-nav a:hover, .footer-contacts a:hover { color: var(--acid); }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 24px; color: var(--muted-2); font-size: 0.78rem; }

/* ── Reveal animation ────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 1000px) {
  .hero-body { grid-template-columns: 1fr; }
  .bridge { max-width: 560px; margin-inline: auto; }
  .max-inner, .contact-inner { grid-template-columns: 1fr; }
  .cards, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step::after { display: none; }
}
@media (max-width: 860px) {
  .nav, .header-cta { display: none; }
  .nav-toggle { display: flex; }
  .mobile-nav.open { display: flex; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3)::before, .stat:nth-child(odd)::before { display: none; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .wrap { padding: 0 18px; }
  .cards, .case-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .hero-meta { grid-template-columns: 1fr; gap: 16px; }
  .stats-inner { grid-template-columns: 1fr; }
  .stat + .stat::before { display: none; }
  .stat { border-top: 1px solid var(--line); }
  .stats-inner .stat:first-child { border-top: none; }
  .footer-inner { grid-template-columns: 1fr; }
  .case-stat { gap: 20px; }
  .bridge-track { grid-template-columns: 1fr; justify-items: center; gap: 0; }
  .bridge-wire { height: 34px; width: 2px; }
  .bridge-wire .wire-svg, .bridge-wire .packet { display: none; }
  .bridge-wire { background: repeating-linear-gradient(180deg, var(--line-2) 0 4px, transparent 4px 9px); }
  .node { padding: 6px 0; }
  .bridge-readout { justify-content: space-between; }
}

/* ── Reduced motion ──────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
  .marquee-track { animation: none; }
  .wire-live, .packet, .core-ring, .eyebrow-dot { animation: none; }
  .wire-live { stroke-dasharray: none; }
}