:root {
  color-scheme: dark;
  --page-bg: #070a08;
  --surface: #101512;
  --surface-strong: #151b17;
  --line: rgba(219, 232, 221, 0.12);
  --line-soft: rgba(219, 232, 221, 0.075);
  --text: #eef3ed;
  --muted: #a2aca5;
  --quiet: #707c74;
  --accent: #a8e000;
  --accent-soft: #b9d892;
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--page-bg);
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 83% 8%, rgba(168, 224, 0, 0.055), transparent 30rem),
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    var(--page-bg);
  background-size: auto, 56px 56px, 56px 56px, auto;
  color: var(--text);
  font-family: "Manrope", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  transform: translateY(-180%);
  border-radius: 10px;
  background: var(--accent);
  color: #081004;
  padding: 10px 14px;
  font-weight: 800;
}

.skip-link:focus {
  transform: translateY(0);
}

.doc-header {
  position: relative;
  z-index: 5;
  display: flex;
  min-height: 88px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 8, 6, 0.9);
  padding: 14px max(28px, calc((100vw - 1420px) / 2));
  backdrop-filter: blur(18px);
}

.doc-brand {
  display: inline-flex;
  align-items: center;
}

.doc-brand img {
  display: block;
  width: min(270px, 54vw);
  height: auto;
}

.doc-header nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-link {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.025);
  padding: 0 18px;
  color: #c4ccc6;
  font-size: 0.86rem;
  font-weight: 750;
  transition: border-color 160ms ease, color 160ms ease, background 160ms ease;
}

.header-link:hover {
  border-color: rgba(168, 224, 0, 0.3);
  background: rgba(168, 224, 0, 0.06);
  color: var(--text);
}

.header-link.primary {
  border-color: transparent;
  background: var(--accent);
  color: #071003;
}

.doc-main {
  width: min(calc(100% - 56px), 1280px);
  margin: 0 auto;
  padding: 70px 0 96px;
}

.doc-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.38fr);
  gap: 54px;
  align-items: end;
  border-bottom: 1px solid var(--line);
  padding: 0 0 46px;
}

.doc-hero h1 {
  max-width: 860px;
  margin: 0;
  overflow-wrap: anywhere;
  font-size: clamp(2.55rem, 6vw, 5rem);
  hyphens: auto;
  letter-spacing: -0.055em;
  line-height: 0.99;
}

.doc-hero p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.7vw, 1.16rem);
}

.doc-meta {
  display: grid;
  gap: 14px;
  border-left: 1px solid var(--line);
  padding-left: 28px;
}

.doc-meta span {
  color: var(--quiet);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.doc-meta strong {
  display: block;
  margin-top: 2px;
  color: #dce3de;
  font-size: 0.94rem;
}

.doc-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 54px;
  align-items: start;
  padding-top: 42px;
}

.doc-toc {
  position: sticky;
  top: 24px;
  display: grid;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(15, 20, 17, 0.88);
  padding: 12px;
}

.doc-toc strong {
  padding: 10px 12px 12px;
  color: var(--quiet);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.doc-toc a {
  border-radius: 10px;
  padding: 9px 12px;
  color: #aeb7b0;
  font-size: 0.82rem;
  line-height: 1.35;
}

.doc-toc a:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.doc-content {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(14, 19, 16, 0.9);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.24);
  padding: clamp(26px, 4.5vw, 58px);
}

.doc-content section {
  scroll-margin-top: 24px;
}

.doc-content section + section {
  margin-top: 46px;
  border-top: 1px solid var(--line-soft);
  padding-top: 42px;
}

.doc-content h2 {
  margin: 0 0 16px;
  color: var(--text);
  font-size: clamp(1.35rem, 2.5vw, 1.9rem);
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.doc-content h3 {
  margin: 28px 0 10px;
  font-size: 1.02rem;
}

.doc-content p {
  margin: 0 0 15px;
  color: #b5beb7;
}

.doc-content ul,
.doc-content ol {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding-left: 22px;
  color: #b5beb7;
}

.doc-content li::marker {
  color: var(--accent-soft);
}

.doc-content a {
  color: #c2df9e;
  text-decoration: underline;
  text-decoration-color: rgba(194, 223, 158, 0.38);
  text-underline-offset: 3px;
}

.notice {
  margin: 22px 0;
  border: 1px solid rgba(168, 224, 0, 0.18);
  border-radius: 15px;
  background: rgba(168, 224, 0, 0.055);
  padding: 20px 22px;
}

.notice strong {
  display: block;
  margin-bottom: 7px;
  color: #dceacb;
}

.notice p:last-child,
.contact-card p:last-child {
  margin-bottom: 0;
}

.steps {
  counter-reset: steps;
  list-style: none;
  padding: 0 !important;
}

.steps li {
  position: relative;
  min-height: 54px;
  padding: 4px 0 0 62px;
}

.steps li::before {
  position: absolute;
  top: 0;
  left: 0;
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(168, 224, 0, 0.24);
  border-radius: 12px;
  background: rgba(168, 224, 0, 0.06);
  color: var(--accent-soft);
  content: counter(steps, decimal-leading-zero);
  counter-increment: steps;
  font-size: 0.74rem;
  font-weight: 850;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 20px;
}

.contact-card {
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.025);
  padding: 20px;
}

.contact-card span {
  display: block;
  margin-bottom: 7px;
  color: var(--quiet);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.contact-card strong {
  color: var(--text);
}

.doc-footer {
  border-top: 1px solid var(--line);
  background: #060907;
}

.doc-footer-inner {
  display: grid;
  width: min(calc(100% - 56px), 1280px);
  min-height: 112px;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  margin: 0 auto;
  color: var(--quiet);
  font-size: 0.78rem;
}

.doc-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 20px;
}

.doc-footer a:hover {
  color: var(--accent-soft);
}

@media (max-width: 860px) {
  .doc-header {
    min-height: 74px;
    padding-inline: 18px;
  }

  .doc-brand img {
    width: min(210px, 46vw);
  }

  .header-link:not(.primary) {
    display: none;
  }

  .doc-main {
    width: min(calc(100% - 28px), 720px);
    padding: 46px 0 68px;
  }

  .doc-hero {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-bottom: 34px;
  }

  .doc-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-left: 0;
    border-top: 1px solid var(--line);
    padding: 22px 0 0;
  }

  .doc-layout {
    grid-template-columns: 1fr;
    gap: 18px;
    padding-top: 24px;
  }

  .doc-toc {
    position: static;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .doc-toc strong {
    grid-column: 1 / -1;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .doc-footer-inner {
    width: min(calc(100% - 28px), 720px);
    grid-template-columns: 1fr;
    padding: 24px 0;
  }

  .doc-footer nav {
    justify-content: flex-start;
  }
}

@media (max-width: 520px) {
  .doc-header nav .primary {
    min-height: 42px;
    padding-inline: 14px;
  }

  .doc-hero h1 {
    font-size: clamp(2.05rem, 9.2vw, 2.3rem);
    letter-spacing: -0.045em;
    line-height: 1.04;
  }

  .doc-meta,
  .doc-toc {
    grid-template-columns: 1fr;
  }

  .doc-content {
    border-radius: 17px;
    padding: 24px 20px;
  }

  .steps li {
    padding-left: 54px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}