/* ============================================================
   Local AI For Companies — design system v2
   Тёмный техно-премиум: почти-чёрный + тёплый белый,
   янтарный акцент обязательств + доверительный синий
   ============================================================ */
:root {
  /* палитра v2 — теплее и контрастнее (тёплый белый на почти-чёрном) */
  --bg-0: #05080f;          /* hero, footer, metrics */
  --bg-1: #090e17;          /* основной фон секций */
  --bg-2: #101a2b;          /* карточки */
  --bg-3: #16243c;          /* карточки hover */
  --line: #21304a;          /* тонкие границы */
  --txt-1: #f6f4ee;         /* тёплый белый */
  --txt-2: #a7b3c7;
  --txt-3: #66748e;
  --accent: #5b9dff;        /* доверительный синий (CTA) */
  --accent-2: #38bdf8;
  --amber: #e9a03b;         /* янтарь: обязательства, цифры, unix-$ */
  --ok: #34d399;
  --err: #f87171;

  --radius: 14px;
  --radius-sm: 8px;
  --max-w: 1140px;
  --display: "Space Grotesk", "Inter", "Segoe UI", system-ui, sans-serif;
  --font: "Inter", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", "Cascadia Code", Consolas, monospace;

  --shadow-1: 0 4px 24px rgba(2, 8, 20, .45);
  --shadow-2: 0 14px 56px rgba(2, 8, 20, .65);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
  font-family: var(--font);
  background: var(--bg-1);
  color: var(--txt-1);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); }

h1, h2, h3 { font-family: var(--display); }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* ---------- шапка ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(5, 8, 15, .85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(33, 48, 74, .6);
}
.nav { display: flex; align-items: center; gap: 28px; height: 68px; }
.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--display);
  font-weight: 700; font-size: 18px; color: var(--txt-1);
  letter-spacing: -.01em; white-space: nowrap;
}
.brand:hover { color: var(--txt-1); }
.brand .brand-ai { color: var(--accent); }
.nav-links { display: flex; gap: 24px; list-style: none; margin-left: auto; }
.nav-links a { color: var(--txt-2); font-size: 15px; font-weight: 500; }
.nav-links a:hover { color: var(--txt-1); }

.lang-drop { position: relative; margin-left: 12px; }
.lang-toggle {
  display: flex; align-items: center; gap: 6px;
  font: inherit; font-size: 13px; font-weight: 700; letter-spacing: .04em;
  color: var(--txt-1); background: var(--bg-2);
  border: 1px solid var(--line); border-radius: 8px;
  padding: 6px 10px; cursor: pointer;
}
.lang-toggle:hover { border-color: var(--accent); }
.lang-chev { transition: transform .18s ease; }
.lang-drop.open .lang-chev { transform: rotate(180deg); }
.lang-menu {
  position: absolute; top: calc(100% + 8px); right: 0; z-index: 120;
  min-width: 168px; padding: 6px;
  background: var(--bg-2); border: 1px solid var(--line); border-radius: 12px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, .45);
  display: none;
}
.lang-drop.open .lang-menu { display: block; }
.lang-menu a {
  display: flex; align-items: center; gap: 10px;
  font-size: 14px; color: var(--txt-2); padding: 8px 10px; border-radius: 8px;
}
.lang-menu a .flag, .lang-toggle .flag {
  flex: 0 0 auto; width: 20px; height: 14px;
  border-radius: 3px; overflow: hidden; display: block;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, .12);
}
.lang-menu a .flag svg, .lang-toggle .flag svg { display: block; width: 100%; height: 100%; }
.lang-toggle .flag[hidden] { display: none; }
.lang-menu a::after { content: attr(data-code); margin-left: auto; font-size: 11px; font-weight: 700; color: var(--txt-3); letter-spacing: .06em; }
.lang-menu a:hover { color: var(--txt-1); background: var(--bg-3); }
.lang-menu a.active { color: var(--accent); background: rgba(91, 157, 255, .12); }
.lang-menu a.active::after { color: var(--accent); }

.burger { display: none; }

/* ---------- hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(ellipse 60% 50% at 75% 8%, rgba(91, 157, 255, .14), transparent 60%),
    radial-gradient(ellipse 45% 40% at 12% 90%, rgba(233, 160, 59, .07), transparent 60%),
    var(--bg-0);
  padding: 150px 0 90px;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(91, 157, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 157, 255, .05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 75%);
}
.hero .container { position: relative; }
.hero-grid {
  display: grid; grid-template-columns: 1.08fr .92fr;
  gap: 56px; align-items: center;
}
.hero-kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 13px; letter-spacing: .06em;
  color: var(--amber);
  border: 1px solid rgba(233, 160, 59, .35); border-radius: 999px;
  padding: 6px 14px; margin-bottom: 26px;
  background: rgba(233, 160, 59, .06);
}
.hero h1 {
  font-size: clamp(38px, 4.9vw, 60px);
  line-height: 1.08; letter-spacing: -.025em; font-weight: 800;
}
.hero h1 .grad {
  background: linear-gradient(92deg, var(--accent) 10%, var(--accent-2) 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lede { margin-top: 22px; max-width: 580px; font-size: clamp(16px, 1.8vw, 19px); color: var(--txt-2); }
.hero-cta { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-note {
  margin-top: 20px; font-family: var(--mono); font-size: 12.5px;
  color: var(--txt-3); letter-spacing: .02em;
}
.hero-note b { color: var(--ok); font-weight: 500; }

/* терминал в hero (unix-эстетика, дозированно) */
.terminal {
  background: #03060b; border: 1px solid var(--line); border-radius: 12px;
  box-shadow: var(--shadow-2); font-family: var(--mono); font-size: 13.5px;
  overflow: hidden;
}
.term-bar { display: flex; align-items: center; gap: 6px; padding: 11px 14px; border-bottom: 1px solid var(--line); background: #060b14; }
.term-bar i { width: 10px; height: 10px; border-radius: 50%; background: #22304a; }
.term-bar i:first-child { background: rgba(233, 160, 59, .4); }
.term-title { margin-left: 10px; color: var(--txt-3); font-size: 12px; }
.term-body { padding: 16px 18px 18px; line-height: 2.05; overflow-x: auto; }
.term-body div { white-space: pre; }
.t-cmd { color: var(--amber); }
.t-flag { color: var(--txt-2); }
.t-ok { color: var(--ok); }
.t-note { color: var(--txt-3); }
.t-ready { color: var(--accent-2); }

/* ---------- кнопки ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: inherit; font-weight: 600; font-size: 16px;
  padding: 14px 26px; border-radius: var(--radius-sm);
  border: 1px solid transparent; cursor: pointer;
  transition: transform .15s ease, filter .2s ease, border-color .2s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(92deg, var(--accent), #3d6fe0);
  color: #fff; box-shadow: 0 6px 24px rgba(91, 157, 255, .35);
}
.btn-primary:hover { color: #fff; filter: brightness(1.08); }
.btn-ghost { border-color: var(--line); color: var(--txt-1); background: transparent; }
.btn-ghost:hover { border-color: var(--accent); color: var(--txt-1); }

/* ---------- полоса обязательств (гигантские цифры) ---------- */
.metrics { background: var(--bg-0); border-block: 1px solid var(--line); padding: 64px 0; }
.metrics .mono-kicker {
  font-family: var(--mono); font-size: 13px; color: var(--txt-3); margin-bottom: 36px;
}
.metrics .mono-kicker b { color: var(--amber); font-weight: 500; }
.metrics-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.metric .num {
  font-family: var(--display); font-weight: 800; letter-spacing: -.03em;
  font-size: clamp(42px, 5vw, 62px); line-height: 1; color: var(--amber);
}
.metric .num small { font-size: .5em; color: var(--txt-2); font-weight: 700; }
.metric .lab { margin-top: 10px; color: var(--txt-2); font-size: 15px; max-width: 230px; }

/* ---------- секции ---------- */
section { padding: 92px 0; }
section.alt { background: var(--bg-0); }
.section-head { max-width: 760px; margin-bottom: 52px; }
.section-kicker {
  font-family: var(--mono); font-size: 13px; letter-spacing: .12em;
  color: var(--accent); margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(28px, 3.4vw, 40px); letter-spacing: -.02em; line-height: 1.15; font-weight: 800; }
.section-head p { margin-top: 14px; color: var(--txt-2); font-size: 18px; }

/* ---------- карточки ---------- */
.grid { display: grid; gap: 24px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--bg-2); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px 26px;
  transition: border-color .2s ease, background .2s ease, transform .2s ease;
}
.card:hover { border-color: rgba(91, 157, 255, .45); background: var(--bg-3); transform: translateY(-3px); }
.card .icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(91, 157, 255, .12); color: var(--accent);
  margin-bottom: 18px;
}
.card .icon svg { width: 23px; height: 23px; }
.card h3 { font-size: 18.5px; margin-bottom: 9px; letter-spacing: -.01em; }
.card p { color: var(--txt-2); font-size: 15px; }

/* ---------- процесс ---------- */
.steps { counter-reset: step; }
.step { position: relative; padding: 24px 26px 24px 82px; background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); }
.step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  position: absolute; left: 26px; top: 24px;
  font-family: var(--mono); font-size: 21px; font-weight: 700; color: var(--amber);
}
.step h3 { font-size: 18px; margin-bottom: 4px; }
.step .time { display: inline-block; font-family: var(--mono); font-size: 12px; color: var(--accent-2); margin-bottom: 8px; }
.step p { color: var(--txt-2); font-size: 15px; }

.ownership {
  margin-top: 36px; padding: 22px 28px; text-align: center;
  border: 1px dashed rgba(233, 160, 59, .55); border-radius: 12px;
  background: rgba(233, 160, 59, .05);
  font-family: var(--display); font-weight: 600; font-size: 17px;
}
.ownership b { color: var(--amber); }

/* ---------- engagement-форматы (build-эстетика) ---------- */
.build-card { display: flex; flex-direction: column; }
.build-card .kind {
  font-family: var(--mono); font-size: 12px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--amber); margin-bottom: 10px;
}
.build-card h3 { font-size: 21px; margin-bottom: 10px; }
.build-card .meta {
  margin-top: auto; padding-top: 18px; font-family: var(--mono); font-size: 12.5px;
  color: var(--txt-3); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
.build-card .meta .st { color: var(--ok); }

/* ---------- команда ---------- */
.expertise { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.expertise span {
  font-size: 14px; font-weight: 500; color: var(--txt-2);
  border: 1px solid var(--line); border-radius: 999px;
  padding: 8px 16px; background: var(--bg-2);
}

/* ---------- контакты ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 52px; align-items: start; }
.contact-mail {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 21px; font-weight: 700; letter-spacing: -.01em;
  color: var(--txt-1); margin: 16px 0 8px;
}
.contact-mail:hover { color: var(--amber); }
.contact-note { color: var(--txt-2); font-size: 15.5px; max-width: 440px; }
.contact-mono { margin-top: 26px; font-family: var(--mono); font-size: 12.5px; color: var(--txt-3); }
.contact-mono b { color: var(--amber); font-weight: 500; }

.form-card {
  background: var(--bg-2); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow-1);
}
.form-card h3 { font-size: 20px; margin-bottom: 6px; }
.form-card .form-sub { color: var(--txt-2); font-size: 15px; margin-bottom: 22px; }

.field { margin-bottom: 17px; }
.field label { display: block; font-family: var(--mono); font-size: 12.5px; font-weight: 500; letter-spacing: .06em; color: var(--txt-2); margin-bottom: 7px; text-transform: uppercase; }
.field label::before { content: "$ "; color: var(--amber); }
.field input, .field textarea {
  width: 100%; font: inherit; font-size: 15.5px; color: var(--txt-1);
  background: var(--bg-0); border: 1px solid var(--line);
  border-radius: var(--radius-sm); padding: 13px 15px;
  transition: border-color .2s ease;
}
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(91, 157, 255, .18);
}
.field textarea { min-height: 130px; resize: vertical; }
.hp-field { position: absolute !important; left: -9999px !important; }

.form-status { margin-top: 14px; font-size: 15px; font-weight: 600; min-height: 22px; }
.form-status.ok { color: var(--ok); }
.form-status.err { color: var(--err); }

/* ---------- футер ---------- */
.site-footer { background: var(--bg-0); border-top: 1px solid var(--line); padding: 40px 0; }
.footer-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-row p { color: var(--txt-3); font-size: 14px; }

/* ---------- адаптив ---------- */
@media (max-width: 1000px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .terminal { max-width: 560px; }
}
@media (max-width: 900px) {
  .grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .grid.cols-3 { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .nav { gap: 10px; }
  .brand span { display: none; }
  .brand::after { content: "Local AI"; font-family: var(--display); font-weight: 700; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; gap: 0;
    position: absolute; top: 68px; left: 0; right: 0;
    background: var(--bg-0); border-bottom: 1px solid var(--line);
    padding: 12px 24px 20px;
  }
  .nav-links.open a { display: block; padding: 12px 0; font-size: 17px; }
  .burger {
    display: flex; flex-direction: column; gap: 5px;
    background: none; border: none; cursor: pointer; padding: 8px;
    margin-left: auto;
  }
  .burger span { width: 22px; height: 2px; background: var(--txt-1); border-radius: 2px; }
  .lang-drop { margin-left: 12px; }
  .hero { padding-top: 128px; }
  section { padding: 60px 0; }
  .grid.cols-4, .grid.cols-2, .grid.cols-3 { grid-template-columns: 1fr; }
  .metrics-grid { grid-template-columns: 1fr 1fr; gap: 26px; }
}

/* utility classes (замена inline-стилей — CSP без 'unsafe-inline') */
.ok-text { color: var(--ok); }
.mt-24 { margin-top: 24px; }
.brand-sm { font-size: 16px; }
.hero-404 { min-height: 70vh; display: flex; align-items: center; }