:root {
  --bg: #07090f;
  --bg-soft: #0c1018;
  --card: #121826;
  --line: rgba(154, 178, 220, 0.14);
  --text: #eef3ff;
  --muted: #93a0b8;
  --accent: #3ee0b4;
  --accent-2: #7b93ff;
  --accent-ink: #06241c;
  --danger: #ff7a90;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --radius: 22px;
  --max: 1120px;
  --font: "Segoe UI Variable", "Segoe UI", "SF Pro Display", system-ui, sans-serif;
  --mono: "Cascadia Code", "SF Mono", Consolas, monospace;
  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #f2f5fb;
  --bg-soft: #e7edf7;
  --card: #ffffff;
  --line: rgba(24, 36, 62, 0.1);
  --text: #101826;
  --muted: #546074;
  --accent: #0c8f6f;
  --accent-2: #3554e0;
  --accent-ink: #ecfff8;
  --danger: #c4334f;
  --shadow: 0 18px 40px rgba(28, 42, 72, 0.08);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scrollbar-gutter: stable; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background:
    radial-gradient(1000px 520px at 85% -10%, color-mix(in srgb, var(--accent-2) 18%, transparent), transparent 55%),
    radial-gradient(820px 420px at -10% 0%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 50%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(color-mix(in srgb, var(--text) 5%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--text) 5%, transparent) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
  opacity: .35;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
a { color: inherit; }
img, svg { display: block; max-width: 100%; }
button, .btn { font: inherit; }

.skip {
  position: absolute;
  left: 12px;
  top: -40px;
  z-index: 20;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 8px 12px;
  border-radius: 8px;
}
.skip:focus { top: 12px; }

.wrap { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--line);
}
.header-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  min-height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 750;
  letter-spacing: -.03em;
}
.brand img { width: 36px; height: 36px; border-radius: 10px; }
.brand span { font-size: 15px; letter-spacing: -.02em; }
.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: nowrap;
  gap: 22px;
  white-space: nowrap;
}
.nav a,
.nav a:link,
.nav a:visited {
  text-decoration: none;
  color: var(--muted);
  font-size: 14px;
  font-weight: 400;
  flex-shrink: 0;
}
.nav a:hover { color: var(--text); }
.header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.icon-btn, .burger {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  border-radius: 12px;
  display: grid;
  place-items: center;
  cursor: pointer;
}
.burger { display: none; }
.burger span, .burger::before, .burger::after {
  content: "";
  width: 16px;
  height: 1.5px;
  background: currentColor;
  display: block;
  margin: 3px 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 16px;
  border-radius: 14px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent-2) 55%, var(--accent)));
  color: var(--accent-ink);
  font-weight: 750;
}
.btn-ghost {
  border-color: var(--line);
  background: color-mix(in srgb, var(--card) 80%, transparent);
}
.btn-lg { min-height: 52px; padding: 0 20px; }
.row-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.row-actions.tight { margin-bottom: 28px; }

.hero { padding: 72px 0 36px; }
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font: 12px/1 var(--mono);
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.kicker i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent);
}
h1, h2, h3 { letter-spacing: -.04em; line-height: 1.12; margin: 0 0 14px; }
h1 { font-size: clamp(34px, 6vw, 64px); max-width: 18ch; text-wrap: balance; }
h2 { font-size: clamp(26px, 4vw, 40px); }
h3 { font-size: 22px; }
.lead, .prose p, .prose li { color: var(--muted); font-size: 17px; }
.lead { max-width: 62ch; margin: 0 0 24px; }
.hero-grid, .split, .cards, .steps, .price-grid, .faq, .constructors {
  display: grid;
  gap: 16px;
}
.hero-grid { grid-template-columns: 1fr; }
.panel {
  background: color-mix(in srgb, var(--card) 88%, transparent);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
}
.stat-row { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 24px; margin-top: 28px; }
.stat { padding: 16px 22px; border: 1px solid var(--line); border-radius: 16px; background: color-mix(in srgb, var(--bg-soft) 70%, transparent); min-width: 160px; }
.stat b { display: block; font-size: 28px; letter-spacing: -.04em; }
.stat span { color: var(--muted); font-size: 13px; }
.slogan { margin: 0; color: var(--muted); font-size: 17px; max-width: 18rem; }
.tag {
  display: inline-flex;
  padding: 4px 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
  font-size: 12px;
}

section { padding: 64px 0; }
.section-head { margin-bottom: 28px; max-width: 70ch; }
.cards { grid-template-columns: repeat(3, 1fr); }
.card {
  padding: 22px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--card) 84%, transparent);
}
.card p, .step p { color: var(--muted); margin: 0; }
.steps { grid-template-columns: repeat(4, 1fr); }
.step {
  padding: 20px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: var(--card);
}
.step b { display: block; font: 12px/1 var(--mono); color: var(--accent); margin-bottom: 10px; }
.constructors { grid-template-columns: repeat(3, 1fr); }
.route {
  text-decoration: none;
  padding: 20px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: var(--card);
  min-height: 150px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.route:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); }
.route code { color: var(--accent); font-family: var(--mono); font-size: 13px; }
.route strong { font-size: 20px; letter-spacing: -.03em; }
.route span { color: var(--muted); font-size: 14px; }

.price-grid { grid-template-columns: 1.1fr .9fr; align-items: stretch; }
.price-box {
  padding: 28px;
  border-radius: 28px;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--accent) 10%, transparent), transparent 40%),
    var(--card);
}
.price-box .sum { font-size: clamp(48px, 8vw, 84px); letter-spacing: -.06em; margin: 8px 0; }
.price-box ul { margin: 16px 0 24px; padding-left: 18px; color: var(--muted); }

.prose { max-width: 78ch; }
.prose h2 { margin-top: 42px; }
.prose h3 { margin-top: 28px; }
.prose a { color: var(--accent-2); }
.crumbs { display: flex; flex-wrap: wrap; gap: 8px; color: var(--muted); font-size: 13px; margin: 24px 0 8px; }
.crumbs a { color: inherit; text-decoration: none; }
.faq details {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
  padding: 16px 18px;
}
.faq summary { cursor: pointer; font-weight: 700; }
.faq p { color: var(--muted); margin: 10px 0 0; }

.footer {
  border-top: 1px solid var(--line);
  padding: 36px 0 88px;
  color: var(--muted);
}
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 24px; }
.footer a { color: var(--text); text-decoration: none; }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }

.fab {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 12;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: #2aa1d8;
  color: #fff;
  box-shadow: 0 12px 30px rgba(20, 130, 180, 0.4);
}
.fab svg { width: 28px; height: 28px; }

.cta-band {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  padding: 28px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: var(--card);
}
.case {
  margin: 0 0 28px;
  background: transparent;
}
.case img {
  width: 100%;
  height: auto;
  display: block;
  background: transparent;
}
.case-body {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--card);
}
.case-body p { color: var(--muted); margin: 0 0 16px; }
.case-links { display: flex; flex-wrap: wrap; gap: 10px; }

@media (max-width: 900px) {
  .cards, .steps, .price-grid, .constructors, .footer-grid { grid-template-columns: 1fr 1fr; }
  .burger { display: flex; flex-direction: column; align-items: center; justify-content: center; }
  .nav {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 76px;
    padding: 16px;
    border-radius: 16px;
    border: 1px solid var(--line);
    background: var(--card);
    flex-direction: column;
    align-items: flex-start;
  }
  .nav.is-open { display: flex; }
  h1 { max-width: none; }
}

@media (max-width: 640px) {
  .cards, .steps, .price-grid, .constructors, .footer-grid, .cta-band { grid-template-columns: 1fr; }
  .header-actions .btn { display: none; }
  .row-actions .btn { width: 100%; }
  section { padding: 48px 0; }
  h1 { font-size: 34px; }
}