:root {
  --bg: #0b0b0c;
  --bg-alt: #111113;
  --card: #151517;
  --line: #26262a;
  --text: #f2f2f0;
  --muted: #a1a1a6;
  --accent: #f5c518;
  --accent-ink: #141100;
  --radius: 16px;
  --max: 1160px;
  --font: "Inter", system-ui, -apple-system, sans-serif;
  --display: "Space Grotesk", var(--font);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-family: var(--display); line-height: 1.1; margin: 0; letter-spacing: -0.02em; }
p { margin: 0; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }

.skip {
  position: absolute; left: 16px; top: -60px; z-index: 100;
  background: var(--accent); color: var(--accent-ink); padding: 8px 14px; border-radius: 8px;
}
.skip:focus { top: 16px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* Nav */
.nav {
  position: fixed; inset: 0 0 auto; z-index: 50;
  transition: background .3s, border-color .3s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(11, 11, 12, .82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-color: var(--line);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 24px; }
.logo { font-family: var(--display); font-weight: 700; font-size: 18px; }
.logo span, h1 span { color: var(--accent); }
.nav__links { display: flex; gap: 32px; font-size: 15px; color: var(--muted); }
.nav__links a { transition: color .2s; }
.nav__links a:hover { color: var(--text); }
.nav__right { display: flex; align-items: center; gap: 12px; }

.lang { display: flex; padding: 3px; border: 1px solid var(--line); border-radius: 999px; }
.lang button {
  border: 0; background: none; color: var(--muted); cursor: pointer;
  font: 600 12px var(--font); padding: 6px 11px; border-radius: 999px;
}
.lang button:hover { color: var(--text); }
.lang button.is-active { background: var(--accent); color: var(--accent-ink); }

.burger { display: none; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 10px; background: none; cursor: pointer; position: relative; }
.burger span { position: absolute; left: 11px; right: 11px; height: 2px; background: var(--text); transition: transform .25s, top .25s; }
.burger span:first-child { top: 15px; }
.burger span:last-child { top: 23px; }
.burger[aria-expanded="true"] span:first-child { top: 19px; transform: rotate(45deg); }
.burger[aria-expanded="true"] span:last-child { top: 19px; transform: rotate(-45deg); }

/* Hero */
.hero {
  position: relative; min-height: 100vh; min-height: 100svh;
  display: flex; align-items: center; overflow: hidden;
  background: radial-gradient(ellipse 80% 60% at 50% 40%, #1a1607 0%, var(--bg) 70%);
}
.hero__bg { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero__content { position: relative; padding-top: 120px; padding-bottom: 96px; max-width: 820px; }
.eyebrow { color: var(--accent); font: 600 13px var(--font); letter-spacing: .18em; text-transform: uppercase; margin-bottom: 16px; }
h1 { font-size: clamp(48px, 9vw, 96px); margin-bottom: 24px; }
.hero__lead { font-size: clamp(18px, 2.2vw, 21px); color: #c9c9cc; max-width: 600px; margin-bottom: 36px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 40px; }
.hero__chips { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.hero__chips li {
  font-size: 13px; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px;
  background: rgba(17, 17, 19, .6);
}

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 50px; padding: 0 26px; border-radius: 999px;
  font: 600 15px var(--font); cursor: pointer; border: 1px solid transparent;
  transition: transform .2s, background .2s, border-color .2s, box-shadow .2s;
}
.btn--primary { background: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px -10px rgba(245, 197, 24, .6); }
.btn--ghost { border-color: var(--line); background: rgba(17, 17, 19, .6); }
.btn--ghost:hover { border-color: var(--muted); }
.btn:disabled { opacity: .6; cursor: progress; transform: none; }

/* Sections */
.section { padding: 112px 0; }
.section--alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section__head { max-width: 640px; margin-bottom: 56px; }
h2 { font-size: clamp(34px, 5vw, 52px); margin-bottom: 16px; }
.section__lead { color: var(--muted); font-size: 18px; }

.grid { display: grid; gap: 20px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px; transition: border-color .25s, transform .25s;
}
.card:hover { border-color: rgba(245, 197, 24, .45); transform: translateY(-3px); }
.card h3 { font-size: 21px; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 15.5px; }
.card__icon {
  width: 44px; height: 44px; padding: 10px; margin-bottom: 22px;
  border-radius: 12px; background: rgba(245, 197, 24, .1);
  fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
}

.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: s; }
.step { position: relative; padding-top: 28px; border-top: 1px solid var(--line); }
.step::before { content: ""; position: absolute; top: -1px; left: 0; width: 48px; height: 2px; background: var(--accent); }
.step__n { font: 600 14px var(--display); color: var(--accent); display: block; margin-bottom: 14px; }
.step h3 { font-size: 22px; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 15.5px; }

.card--case { display: flex; flex-direction: column; gap: 16px; padding: 36px; }
.case__top { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px; }
.card--case h3 { font-size: 24px; margin: 0; }
.case__where { font-size: 13px; color: var(--muted); }
.tags { list-style: none; padding: 0; margin: auto 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.tags li { font-size: 12.5px; font-weight: 500; color: var(--accent); background: rgba(245, 197, 24, .1); padding: 4px 12px; border-radius: 999px; }

/* Contact */
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.contact .section__lead { margin-bottom: 28px; }
.contact__mail {
  display: inline-block; font: 600 clamp(19px, 2.4vw, 24px) var(--display); margin-bottom: 36px;
  border-bottom: 2px solid var(--accent); padding-bottom: 2px; word-break: break-all;
}
.contact__mail:hover { color: var(--accent); }
.company { margin: 0; display: grid; gap: 14px; font-size: 15px; }
.company dt { font-weight: 600; }
.company dd { margin: 0; color: var(--muted); }

.form {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px; display: grid; gap: 18px;
}
.form label { display: grid; gap: 8px; font-size: 14px; font-weight: 500; }
.form input, .form textarea {
  width: 100%; background: var(--bg); color: var(--text);
  border: 1px solid var(--line); border-radius: 10px; padding: 13px 14px;
  font: 16px var(--font); transition: border-color .2s;
}
.form textarea { resize: vertical; min-height: 130px; }
.form input:focus, .form textarea:focus { outline: none; border-color: var(--accent); }
.form .is-invalid { border-color: #e5484d; }
.form .btn { width: 100%; }
.form__status { font-size: 14px; min-height: 1.4em; color: var(--muted); }
.form__status.is-ok { color: #46c47a; }
.form__status.is-err { color: #ff8a8a; }
.hp { position: absolute; left: -9999px; }

.footer { padding: 32px 0; font-size: 14px; color: var(--muted); }
.footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.footer a:hover { color: var(--text); }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .card { transition: none; }
}

/* Responsive */
@media (max-width: 960px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); row-gap: 40px; }
  .contact { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 760px) {
  .container { padding: 0 16px; }
  .burger { display: block; }
  .nav__links {
    position: fixed; top: 68px; left: 0; right: 0;
    flex-direction: column; gap: 0; padding: 8px 16px 20px;
    background: rgba(11, 11, 12, .97); border-bottom: 1px solid var(--line);
    font-size: 17px; color: var(--text);
    transform: translateY(-8px); opacity: 0; visibility: hidden;
    transition: opacity .2s, transform .2s, visibility .2s;
  }
  .nav__links a { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav__links a:last-child { border-bottom: 0; }
  .nav.is-open { background: rgba(11, 11, 12, .97); border-color: var(--line); }
  .nav.is-open .nav__links { opacity: 1; transform: none; visibility: visible; }
  .logo { font-size: 16px; }
  .lang button { padding: 6px 9px; }

  .section { padding: 80px 0; }
  .section__head { margin-bottom: 40px; }
  .grid--3, .grid--2, .steps { grid-template-columns: 1fr; }
  .card, .card--case, .form { padding: 24px; }
  .hero__cta .btn { flex: 1 1 auto; }
}