/*
AI Admin design system
Brand tone: технологичный, экспертный, дружелюбный без агрессивной рекламы.
Palette: тёмный графитовый фон, бирюзовый AI-акцент, фиолетовый для сценариев и янтарный для статусов.
Typography: Manrope/Inter-like system stack for headings and UI, JetBrains Mono-like monospace for metrics and labels.
*/
:root {
  --color-bg: #09111f;
  --color-bg-deep: #060b14;
  --color-bg-soft: #0f1b2d;
  --color-surface: rgba(17, 31, 51, 0.82);
  --color-surface-strong: #14243a;
  --color-card: rgba(19, 34, 55, 0.88);
  --color-card-hover: rgba(29, 52, 82, 0.96);
  --color-line: rgba(228, 241, 255, 0.13);
  --color-line-strong: rgba(100, 244, 214, 0.35);
  --color-text: #eef6ff;
  --color-muted: #a8b4c6;
  --color-muted-2: #7e8da3;
  --color-primary: #64f4d6;
  --color-primary-dark: #18bfa4;
  --color-accent: #8f7cff;
  --color-accent-soft: rgba(143, 124, 255, 0.18);
  --color-warning: #ffca73;
  --color-danger: #ff6b8a;
  --color-success: #7df1a8;
  --color-link: #8beaff;
  --gradient-hero: radial-gradient(circle at 20% 10%, rgba(100, 244, 214, 0.28), transparent 28%), radial-gradient(circle at 82% 4%, rgba(143, 124, 255, 0.24), transparent 26%), linear-gradient(135deg, #0b1424 0%, #09111f 48%, #0e1730 100%);
  --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
  --shadow-card: 0 24px 70px rgba(1, 7, 19, 0.38);
  --shadow-soft: 0 16px 48px rgba(0, 0, 0, 0.24);
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --container: 1180px;
  --font-heading: "Manrope", "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--gradient-hero);
  line-height: 1.65;
  min-width: 320px;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  z-index: -1;
}

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

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

a:hover,
a:focus-visible {
  color: var(--color-primary);
}

:focus-visible {
  outline: 3px solid rgba(100, 244, 214, 0.6);
  outline-offset: 3px;
}

.container {
  width: min(100% - 32px, var(--container));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  background: var(--color-primary);
  color: #041018;
  border-radius: var(--radius-sm);
  transform: translateY(-140%);
  z-index: 100;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(22px);
  background: rgba(7, 13, 24, 0.78);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--color-text);
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: inline-grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #06101f;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  box-shadow: 0 0 32px rgba(100, 244, 214, 0.34);
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.main-nav a {
  color: var(--color-muted);
  padding: 9px 12px;
  border-radius: 999px;
  font-size: 0.95rem;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.07);
}

.hero,
.page-hero {
  padding: 86px 0 58px;
}

.hero-grid,
.split-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(320px, 0.94fr);
  gap: 42px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--color-line-strong);
  border-radius: 999px;
  background: rgba(100, 244, 214, 0.08);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-family: var(--font-heading);
  line-height: 1.08;
  letter-spacing: -0.045em;
  margin: 0;
}

h1 {
  margin-top: 18px;
  font-size: clamp(2.55rem, 7vw, 5.65rem);
  max-width: 920px;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
  margin-bottom: 18px;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.lead {
  color: var(--color-muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  max-width: 760px;
  margin: 22px 0 0;
}

.text-muted {
  color: var(--color-muted);
}

.hero-actions,
.section-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 13px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  color: #051018;
  background: var(--color-primary);
  box-shadow: 0 14px 36px rgba(100, 244, 214, 0.21);
}

.btn:hover,
.btn:focus-visible {
  color: #051018;
  transform: translateY(-2px);
  background: #83ffe5;
}

.btn-secondary {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.07);
  border-color: var(--color-line);
  box-shadow: none;
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.12);
}

.visual-card {
  position: relative;
  overflow: hidden;
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  background: var(--gradient-card), rgba(10, 18, 32, 0.74);
  box-shadow: var(--shadow-card);
}

.visual-card::after {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(100, 244, 214, 0.14);
  border-radius: calc(var(--radius-xl) - 10px);
  pointer-events: none;
}

.status-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 22px;
}

.status-item {
  padding: 14px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-line);
}

.status-item strong {
  display: block;
  font-family: var(--font-mono);
  color: var(--color-primary);
  font-size: 1.1rem;
}

.status-item span {
  display: block;
  color: var(--color-muted);
  font-size: 0.86rem;
  margin-top: 3px;
}

.section {
  padding: 68px 0;
}

.section:first-of-type {
  padding-top: 20px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 30px;
  margin-bottom: 28px;
}

.section-head p {
  max-width: 610px;
  margin: 0;
  color: var(--color-muted);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.cards.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card,
.article-card,
.metric-card,
.step,
.note-box {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--gradient-card), var(--color-card);
  box-shadow: var(--shadow-soft);
}

.card,
.article-card,
.metric-card,
.note-box {
  padding: 24px;
}

.card:hover,
.article-card:hover,
.metric-card:hover {
  transform: translateY(-3px);
  background: var(--gradient-card), var(--color-card-hover);
  border-color: rgba(100, 244, 214, 0.24);
  transition: transform 190ms ease, background 190ms ease, border-color 190ms ease;
}

.card img.icon,
.article-card img.icon {
  width: 44px;
  height: 44px;
  margin-bottom: 18px;
}

.card p,
.article-card p,
.metric-card p,
.step p,
.note-box p {
  color: var(--color-muted);
  margin: 0;
}

.link-card {
  display: inline-flex;
  margin-top: 16px;
  font-weight: 800;
}

.feature-list,
.clean-list {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  display: grid;
  gap: 12px;
}

.feature-list li,
.clean-list li {
  position: relative;
  padding-left: 30px;
  color: var(--color-muted);
}

.feature-list li::before,
.clean-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-primary) 0 35%, rgba(100, 244, 214, 0.18) 38% 100%);
  box-shadow: 0 0 18px rgba(100, 244, 214, 0.35);
}

.process {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.step {
  padding: 22px;
  position: relative;
  overflow: hidden;
}

.step-number {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 14px;
  margin-bottom: 16px;
  color: #07111f;
  background: var(--color-primary);
  font-family: var(--font-mono);
  font-weight: 800;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.metric-card strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.55rem;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.page-hero {
  border-bottom: 1px solid var(--color-line);
}

.page-hero h1 {
  font-size: clamp(2.35rem, 6vw, 4.8rem);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
  color: var(--color-muted-2);
  font-size: 0.92rem;
}

.breadcrumbs a {
  color: var(--color-muted);
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(280px, 0.28fr);
  gap: 30px;
  align-items: start;
}

.prose {
  padding: 30px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-line);
  background: rgba(12, 22, 38, 0.64);
}

.prose h2:not(:first-child) {
  margin-top: 42px;
}

.prose h2 {
  font-size: clamp(1.75rem, 3vw, 2.65rem);
}

.prose h3 {
  margin-top: 24px;
}

.prose p {
  color: var(--color-muted);
  margin: 16px 0 0;
}

.prose a {
  border-bottom: 1px solid rgba(139, 234, 255, 0.35);
}

.sidebar {
  position: sticky;
  top: 96px;
  display: grid;
  gap: 16px;
}

.sidebar-card {
  padding: 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-line);
  background: rgba(17, 31, 51, 0.78);
}

.sidebar-card h2,
.sidebar-card h3 {
  font-size: 1.18rem;
}

.sidebar-card ul {
  margin: 14px 0 0;
  padding-left: 18px;
  color: var(--color-muted);
}

.inline-image {
  margin: 24px 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-line);
  background: rgba(255, 255, 255, 0.04);
  padding: 16px;
}

.comparison {
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.035);
  margin-top: 24px;
}

.comparison table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

.comparison th,
.comparison td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-muted);
}

.comparison th {
  color: var(--color-text);
  font-family: var(--font-heading);
  background: rgba(255, 255, 255, 0.05);
}

.comparison tr:last-child td {
  border-bottom: 0;
}

.cta-block {
  position: relative;
  overflow: hidden;
  padding: 38px;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(100, 244, 214, 0.26);
  background: radial-gradient(circle at 20% 10%, rgba(100, 244, 214, 0.20), transparent 28%), radial-gradient(circle at 90% 30%, rgba(143, 124, 255, 0.22), transparent 26%), rgba(12, 22, 38, 0.82);
  box-shadow: var(--shadow-card);
}

.cta-block p {
  color: var(--color-muted);
  max-width: 720px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.form-field {
  display: grid;
  gap: 7px;
}

.form-field.full {
  grid-column: 1 / -1;
}

label {
  color: var(--color-muted);
  font-size: 0.94rem;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: rgba(5, 10, 18, 0.62);
  color: var(--color-text);
  padding: 13px 14px;
  font: inherit;
}

textarea {
  min-height: 126px;
  resize: vertical;
}

.form-note {
  font-size: 0.9rem;
  color: var(--color-muted-2);
  margin-top: 12px;
}

.site-footer {
  margin-top: 46px;
  border-top: 1px solid var(--color-line);
  background: rgba(5, 10, 18, 0.76);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, 1fr);
  gap: 24px;
  padding: 38px 0;
}

.footer-grid p,
.footer-grid li {
  color: var(--color-muted);
}

.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  display: grid;
  gap: 9px;
}

.footer-bottom {
  border-top: 1px solid var(--color-line);
  padding: 16px 0 24px;
  color: var(--color-muted-2);
  font-size: 0.9rem;
}

@media (max-width: 980px) {
  .header-inner,
  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .main-nav {
    justify-content: flex-start;
  }

  .hero-grid,
  .split-grid,
  .content-grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .cards,
  .cards.two,
  .process,
  .metric-grid,
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 22px, var(--container));
  }

  .hero,
  .page-hero {
    padding: 54px 0 40px;
  }

  .section {
    padding: 46px 0;
  }

  .main-nav a {
    padding: 8px 10px;
    font-size: 0.9rem;
  }

  .cards,
  .cards.two,
  .process,
  .metric-grid,
  .status-strip,
  .footer-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .form-field.full {
    grid-column: auto;
  }

  .prose,
  .cta-block,
  .visual-card {
    padding: 20px;
    border-radius: var(--radius-lg);
  }

  .hero-actions,
  .section-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}