/*
  Robotomania design system
  Brand idea: спокойное технологичное медиа о роботах без агрессивного хайпа.
  Visual language: тёмная лабораторная среда, неоновые акценты, карточки с мягким свечением,
  модульная сетка, крупные заголовки и аккуратная редакционная типографика.
*/
:root {
  --color-bg: #07111f;
  --color-bg-soft: #0d1b2e;
  --color-surface: #102238;
  --color-surface-2: #132b45;
  --color-card: rgba(18, 39, 64, 0.82);
  --color-line: rgba(129, 198, 255, 0.18);
  --color-text: #e7f2ff;
  --color-muted: #9fb7ce;
  --color-heading: #f4fbff;
  --color-primary: #35d7ff;
  --color-primary-dark: #0899c3;
  --color-accent: #a6ff4d;
  --color-accent-2: #ffb84d;
  --color-danger: #ff637d;
  --color-link: #66e3ff;
  --color-link-hover: #a6ff4d;
  --shadow-card: 0 20px 50px rgba(0, 0, 0, 0.34);
  --shadow-glow: 0 0 0 1px rgba(53, 215, 255, 0.14), 0 24px 70px rgba(53, 215, 255, 0.10);
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-pill: 999px;
  --font-ui: "Manrope", "Inter", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: "Space Grotesk", "Manrope", "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --container: 1180px;
  --section-y: clamp(56px, 8vw, 104px);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  font-family: var(--font-ui);
  color: var(--color-text);
  background:
    radial-gradient(circle at 16% 0%, rgba(53, 215, 255, 0.18), transparent 30%),
    radial-gradient(circle at 84% 10%, rgba(166, 255, 77, 0.10), transparent 28%),
    linear-gradient(180deg, var(--color-bg) 0%, #09182a 48%, #06101d 100%);
  line-height: 1.65;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(102, 227, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(102, 227, 255, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.9), rgba(0,0,0,.08));
  z-index: -1;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color .18s ease, border-color .18s ease, transform .18s ease;
}

a:hover { color: var(--color-link-hover); }

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(166, 255, 77, .72);
  outline-offset: 3px;
}

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

p { margin: 0 0 1rem; color: var(--color-muted); }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-heading);
  line-height: 1.08;
  margin: 0 0 .75rem;
  letter-spacing: -0.035em;
}

h1 { font-size: clamp(2.45rem, 7vw, 5.75rem); }
h2 { font-size: clamp(1.9rem, 4vw, 3.35rem); }
h3 { font-size: clamp(1.18rem, 2vw, 1.58rem); }

ul, ol { color: var(--color-muted); }

.skip-link {
  position: absolute;
  left: 16px;
  top: 8px;
  padding: 10px 14px;
  background: var(--color-accent);
  color: #05111f;
  border-radius: var(--radius-pill);
  transform: translateY(-140%);
  z-index: 100;
}
.skip-link:focus { transform: translateY(0); }

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--color-line);
  background: rgba(7, 17, 31, .86);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-heading);
  font-family: var(--font-heading);
  font-weight: 800;
  letter-spacing: -.04em;
}

.logo img { width: 42px; height: 42px; }
.logo span { font-size: 1.22rem; }

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.main-nav a {
  padding: 10px 14px;
  border-radius: var(--radius-pill);
  color: var(--color-muted);
  font-size: .95rem;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--color-heading);
  background: rgba(53, 215, 255, .10);
}

.hero {
  padding: clamp(58px, 8vw, 112px) 0 clamp(48px, 7vw, 90px);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, .72fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
}

.hero-copy { position: relative; }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  padding: 8px 12px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  color: var(--color-accent);
  background: rgba(166, 255, 77, .08);
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .02em;
  text-transform: uppercase;
}

.lead {
  max-width: 760px;
  font-size: clamp(1.08rem, 2vw, 1.34rem);
  color: #bdd4e8;
}

.hero-actions,
.cta-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-weight: 760;
  line-height: 1;
}

.btn-primary {
  color: #03121e;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  box-shadow: 0 14px 40px rgba(53, 215, 255, .24);
}

.btn-primary:hover {
  color: #03121e;
  transform: translateY(-2px);
}

.btn-secondary {
  color: var(--color-heading);
  border-color: var(--color-line);
  background: rgba(255, 255, 255, .04);
}

.btn-secondary:hover {
  border-color: rgba(166, 255, 77, .45);
  background: rgba(166, 255, 77, .08);
}

.hero-visual {
  position: relative;
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(255,255,255,.08), rgba(255,255,255,.025)),
    var(--color-card);
  box-shadow: var(--shadow-glow);
  overflow: hidden;
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: auto -24% -34% 26%;
  height: 180px;
  background: radial-gradient(circle, rgba(53,215,255,.26), transparent 70%);
}

.hero-visual img {
  position: relative;
  z-index: 1;
  border-radius: 20px;
}

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

.stat {
  padding: 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, .04);
}

.stat strong {
  display: block;
  color: var(--color-heading);
  font-family: var(--font-heading);
  font-size: 1.55rem;
  line-height: 1;
}

.stat span {
  display: block;
  margin-top: 8px;
  color: var(--color-muted);
  font-size: .88rem;
}

.section {
  padding: var(--section-y) 0;
}

.section.tight { padding-top: 34px; }

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 30px;
}

.section-head p { max-width: 650px; margin-bottom: 0; }

.grid {
  display: grid;
  gap: 20px;
}

.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card,
.article-card,
.panel,
.feature-box {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-card);
  box-shadow: var(--shadow-card);
}

.card,
.article-card,
.panel { padding: clamp(20px, 3vw, 30px); }

.card:hover,
.article-card:hover {
  border-color: rgba(53, 215, 255, .42);
  transform: translateY(-3px);
}

.card { transition: transform .2s ease, border-color .2s ease; }

.card-icon {
  width: 46px;
  height: 46px;
  display: inline-grid;
  place-items: center;
  margin-bottom: 18px;
  border-radius: 16px;
  background: rgba(53, 215, 255, .12);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-weight: 800;
}

.article-card {
  display: grid;
  gap: 18px;
  overflow: hidden;
  transition: transform .2s ease, border-color .2s ease;
}

.article-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 20px;
  border: 1px solid var(--color-line);
  background: var(--color-bg-soft);
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: .78rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 5px 9px;
  border-radius: var(--radius-pill);
  background: rgba(53, 215, 255, .10);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: .76rem;
}

.feature-box {
  overflow: hidden;
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  align-items: center;
  gap: 0;
}

.feature-box img {
  width: 100%;
  min-height: 320px;
  object-fit: cover;
  background: var(--color-bg-soft);
}

.feature-content { padding: clamp(24px, 5vw, 54px); }

.check-list,
.clean-list {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
}

.check-list li,
.clean-list li {
  position: relative;
  padding-left: 30px;
  margin-bottom: 12px;
}

.check-list li::before,
.clean-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .65em;
  width: 14px;
  height: 14px;
  border-radius: 5px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  box-shadow: 0 0 18px rgba(53, 215, 255, .35);
}

.text-block {
  max-width: 890px;
}

.text-block p { font-size: 1.03rem; }

.callout {
  margin: 30px 0;
  padding: clamp(22px, 4vw, 36px);
  border: 1px solid rgba(166, 255, 77, .24);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(166, 255, 77, .10), rgba(53, 215, 255, .07));
}

.callout p:last-child { margin-bottom: 0; }

.timeline {
  display: grid;
  gap: 18px;
  counter-reset: steps;
}

.timeline-item {
  position: relative;
  padding: 24px 24px 24px 76px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.035);
}

.timeline-item::before {
  counter-increment: steps;
  content: counter(steps, decimal-leading-zero);
  position: absolute;
  left: 22px;
  top: 22px;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: #06111f;
  background: var(--color-accent);
  font-family: var(--font-mono);
  font-weight: 800;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
}

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

.compare-table th {
  color: var(--color-heading);
  background: rgba(53, 215, 255, .10);
}

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

.glossary-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.term {
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.035);
}

.term dt {
  margin-bottom: 8px;
  color: var(--color-heading);
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
}

.term dd { margin: 0; color: var(--color-muted); }

.cta-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 5vw, 56px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(53, 215, 255, .25);
  background:
    radial-gradient(circle at 78% 20%, rgba(166,255,77,.20), transparent 30%),
    linear-gradient(135deg, rgba(53,215,255,.13), rgba(18,39,64,.92));
  box-shadow: var(--shadow-glow);
}

.cta-panel::before {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px dashed rgba(231, 242, 255, .12);
  border-radius: calc(var(--radius-lg) - 12px);
  pointer-events: none;
}

.cta-panel > * { position: relative; }

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
  color: var(--color-muted);
  font-size: .92rem;
}

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

.site-footer {
  padding: 46px 0 34px;
  border-top: 1px solid var(--color-line);
  background: rgba(4, 10, 18, .72);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr .9fr;
  gap: 28px;
  align-items: start;
}

.footer-title {
  margin-bottom: 10px;
  color: var(--color-heading);
  font-weight: 800;
}

.footer-links {
  display: grid;
  gap: 8px;
}

.footer-note {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  font-size: .92rem;
}

@media (max-width: 980px) {
  .header-inner { align-items: flex-start; flex-direction: column; padding: 14px 0; }
  .main-nav { justify-content: flex-start; }
  .hero-grid,
  .feature-box,
  .footer-grid { grid-template-columns: 1fr; }
  .grid-3,
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-box img { min-height: 260px; }
}

@media (max-width: 680px) {
  .container { width: min(100% - 24px, var(--container)); }
  .main-nav { gap: 4px; }
  .main-nav a { padding: 8px 10px; font-size: .9rem; }
  .hero { padding-top: 42px; }
  .hero-grid { grid-template-columns: 1fr; }
  .grid-2,
  .grid-3,
  .grid-4,
  .glossary-list,
  .stat-strip { grid-template-columns: 1fr; }
  .section-head { align-items: flex-start; flex-direction: column; }
  .timeline-item { padding-left: 24px; padding-top: 78px; }
  .compare-table { display: block; overflow-x: auto; white-space: nowrap; }
  .logo span { font-size: 1.05rem; }
}