:root {
  --bg: #0c0c0d;
  --bg-raised: #161618;
  --ink: #f4eee6;
  --muted: #9a9188;
  --line: rgba(255, 255, 255, 0.08);
  --ember: #ff6a00;
  --ember-deep: #e55e00;
  --ember-soft: rgba(255, 106, 0, 0.16);
  --navy: #1d2073;
  --coral: #ff7e5f;
  --header-bg: #ffffff;
  --green: #34c759;
  --serif: "Fraunces", "Noto Serif SC", "Noto Serif", Georgia, serif;
  --sans: "IBM Plex Sans", "Noto Sans SC", system-ui, sans-serif;
  --mono: "IBM Plex Mono", "Noto Sans SC", ui-monospace, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html[lang="ru"] {
  --serif: "Noto Serif", "Fraunces", Georgia, serif;
}

html[lang^="zh"] {
  --serif: "Noto Serif SC", "Fraunces", Georgia, serif;
  --sans: "Noto Sans SC", "IBM Plex Sans", system-ui, sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.35'/%3E%3C/svg%3E");
  opacity: 0.07;
  mix-blend-mode: overlay;
  z-index: 0;
}

a {
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

.wrap {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.skip {
  position: absolute;
  left: -999px;
}

.skip:focus {
  left: 16px;
  top: 16px;
  z-index: 20;
  background: var(--ember);
  color: #111;
  padding: 8px 12px;
}

.draft-bar {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 20px;
  background: repeating-linear-gradient(
    -45deg,
    #1a0e07,
    #1a0e07 8px,
    #241408 8px,
    #241408 16px
  );
  border-bottom: 1px solid var(--ember);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ember);
}

.site-header {
  position: relative;
  z-index: 2;
  background: var(--header-bg);
  border-bottom: 1px solid rgba(29, 32, 115, 0.1);
  color: var(--navy);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex: 0 1 auto;
  min-width: 0;
}

.brand img.logo {
  height: 44px;
  width: auto;
  max-width: min(220px, 52vw);
}

.langs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-left: auto;
}

.langs a {
  text-decoration: none;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 9px;
  border: 1px solid transparent;
  color: #5c5e8f;
}

.langs a[aria-current="page"] {
  color: var(--navy);
  border-color: rgba(29, 32, 115, 0.16);
  background: #f3f4fb;
}

.langs a:hover {
  color: var(--navy);
}

.nav-source {
  font-size: 13px;
  text-decoration: none;
  border: 1px solid rgba(29, 32, 115, 0.18);
  padding: 8px 12px;
  color: var(--navy);
}

.nav-source:hover {
  border-color: var(--coral);
  color: var(--coral);
}

.notice {
  position: relative;
  z-index: 2;
  margin: 12px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--ember);
  background: var(--ember-soft);
}

.notice p {
  margin: 0;
  font-size: 14px;
}

.notice p + p {
  margin-top: 8px;
}

.hero {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding: 48px 0 72px;
}

.hero::after {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  right: -80px;
  top: -40px;
  background: radial-gradient(circle, rgba(255, 106, 0, 0.28), transparent 62%);
  pointer-events: none;
  z-index: -1;
}

.kicker {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ember);
}

h1,
h2 {
  font-family: var(--serif);
  font-weight: 560;
  letter-spacing: -0.03em;
  line-height: 1.08;
}

h1 {
  margin: 0;
  font-size: clamp(2.6rem, 6vw, 5.1rem);
}

.lead {
  margin: 22px 0 28px;
  max-width: 38rem;
  font-size: 1.12rem;
  color: #d8d0c7;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  background: var(--ember);
  color: #140a04;
  font-weight: 600;
  padding: 12px 16px;
}

.btn:hover {
  background: #ff8124;
}

.ghost {
  font-size: 13px;
  color: var(--muted);
  font-family: var(--mono);
}

.stage {
  position: relative;
  min-height: 420px;
}

.mesh {
  position: absolute;
  inset: 18px 0 0;
  width: 100%;
  height: 360px;
}

.node {
  fill: #1c1c1e;
  stroke: var(--ember);
  stroke-width: 1.5;
}

.node-label {
  fill: var(--muted);
  font-size: 11px;
  font-family: var(--mono);
}

.phone {
  position: relative;
  margin-left: auto;
  width: 250px;
  background: #121212;
  border: 1px solid #2c2c2e;
  border-radius: 28px;
  padding: 16px 14px 18px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}

.phone-top {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 16px;
}

.phone-name {
  font-weight: 600;
}

.phone-status {
  font-size: 11px;
  color: var(--green);
}

.bubble {
  max-width: 88%;
  padding: 9px 12px;
  margin-bottom: 10px;
  font-size: 14px;
}

.bubble.in {
  background: #2a2a2c;
  border-radius: 14px 14px 14px 4px;
}

.bubble.out {
  margin-left: auto;
  background: var(--ember);
  color: #fff;
  border-radius: 14px 14px 4px 14px;
}

.bubble .meta {
  display: block;
  margin-top: 4px;
  font-size: 10px;
  opacity: 0.75;
}

.section {
  position: relative;
  z-index: 1;
  padding: 28px 0 64px;
  border-top: 1px solid var(--line);
}

h2 {
  margin: 0 0 28px;
  font-size: clamp(1.8rem, 3.4vw, 2.7rem);
  max-width: 18ch;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.card {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  padding: 20px 18px 22px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.card p,
.step p,
.plat p,
.prose p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.step {
  padding: 18px 16px 20px;
  border-top: 2px solid var(--ember);
  background: linear-gradient(180deg, rgba(255, 106, 0, 0.08), transparent 42%);
}

.step .n {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ember);
}

.step h3 {
  margin: 10px 0 8px;
}

.plats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.plat {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
  padding: 22px;
  border: 1px dashed var(--line);
}

.glyph {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: var(--ember);
  color: #140a04;
  font-weight: 700;
}

.source-block {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 32px;
  align-items: end;
}

.prose {
  max-width: 42rem;
}

.disclaimer {
  margin-top: 36px;
  padding: 20px 22px;
  background: #1a1010;
  border: 1px solid #5a2a1a;
}

.disclaimer h3 {
  margin: 0 0 8px;
  color: #ffb089;
}

.site-footer {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  padding: 24px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 900px) {
  .hero,
  .source-block {
    grid-template-columns: 1fr;
  }

  .hero::after {
    right: 10%;
    top: auto;
    bottom: -60px;
  }

  .cards,
  .steps,
  .plats {
    grid-template-columns: 1fr;
  }

  .phone {
    margin: 12px auto 0;
  }

  .nav-source {
    display: none;
  }

  .site-header-inner {
    flex-wrap: wrap;
  }
}

@media (max-width: 640px) {
  .wrap {
    width: min(1120px, calc(100% - 28px));
  }

  .brand img.logo {
    height: 38px;
  }

  h1 {
    font-size: 2.4rem;
  }
}