:root {
  --bg: #050816;
  --bg-accent: #0f172a;
  --bg-soft: #020617;
  --primary: #38bdf8;
  --primary-soft: rgba(56, 189, 248, 0.1);
  --primary-strong: #0ea5e9;
  --text-main: #e5e7eb;
  --text-muted: #9ca3af;
  --danger: #f97373;
  --border-subtle: rgba(148, 163, 184, 0.3);
  --radius-lg: 18px;
  --radius-full: 999px;
  --shadow-soft: 0 24px 60px rgba(15, 23, 42, 0.8);
  --shadow-glow: 0 0 40px rgba(56, 189, 248, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #1d2951 0, #020617 40%, #000 90%);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

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

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 20px 60px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  margin-bottom: 28px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.7));
  backdrop-filter: blur(18px);
  position: sticky;
  top: 14px;
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 12px;
  background: radial-gradient(circle at 30% 0, #e0f2fe, #0f172a);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.brand-logo img {
  width: 26px;
  height: 26px;
  display: block;
}

.brand-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-title {
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.brand-tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.nav-links a {
  padding: 4px 0;
  position: relative;
  opacity: 0.9;
  transition: color 0.15s ease, opacity 0.15s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), var(--primary-strong));
  transition: width 0.18s ease;
}

.nav-links a:hover {
  color: var(--primary);
  opacity: 1;
}

.nav-links a:hover::after {
  width: 100%;
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 14px;
}

.badge-live {
  padding: 3px 10px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(56, 189, 248, 0.5);
  background: radial-gradient(circle at 0 0, rgba(56, 189, 248, 0.35), rgba(15, 23, 42, 0.9));
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  gap: 6px;
  color: #e0f2fe;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.35);
}

.btn {
  border: none;
  cursor: pointer;
  font: inherit;
  border-radius: var(--radius-full);
  padding: 9px 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease,
    background 0.15s ease,
    border-color 0.15s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: #0b1220;
  font-weight: 600;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 50px rgba(56, 189, 248, 0.65);
}

.btn-outline {
  background: transparent;
  border: 1px solid rgba(148, 163, 184, 0.6);
  color: var(--text-main);
  font-size: 0.9rem;
}

.btn-outline:hover {
  border-color: var(--primary);
  background: rgba(15, 23, 42, 0.9);
}

main {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

@media (max-width: 960px) {
  header {
    position: static;
    border-radius: 14px;
    flex-wrap: wrap;
  }

  main {
    gap: 28px;
  }

  .nav-links {
    flex: 1 1 100%;
    justify-content: center;
    flex-wrap: wrap;
  }
}

@media (max-width: 640px) {
  .shell {
    padding: 16px 14px 40px;
  }

  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .nav-links {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
    row-gap: 4px;
  }

  .header-cta {
    width: 100%;
    justify-content: space-between;
  }

  .btn {
    padding-inline: 14px;
  }
}

.hero {
  background: radial-gradient(circle at top left, #1e293b, #020617 55%);
  border-radius: 26px;
  padding: 26px 26px 24px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -80px;
  background:
    radial-gradient(circle at 0 0, rgba(56, 189, 248, 0.13), transparent 55%),
    radial-gradient(circle at 100% 0, rgba(96, 165, 250, 0.14), transparent 55%);
  opacity: 0.8;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(15, 23, 42, 0.92);
  font-size: 0.78rem;
  color: #e5e7eb;
  margin-bottom: 14px;
}

.eyebrow-kicker {
  padding: 3px 8px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.71rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #fef3c7;
  background: rgba(251, 191, 36, 0.12);
  border: 1px solid rgba(252, 211, 77, 0.4);
}

.hero-title {
  font-size: clamp(2.2rem, 3.1vw + 1rem, 3rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin: 0 0 12px;
}

.hero-highlight {
  background: linear-gradient(120deg, #fef3c7, #e0f2fe, #a5b4fc);
  -webkit-background-clip: text;
  color: transparent;
}

.hero-subtitle {
  font-size: 1.03rem;
  color: var(--text-muted);
  max-width: 36rem;
  margin-bottom: 20px;
}

.hero-subtitle strong {
  color: #e5e7eb;
  font-weight: 600;
}

.hero-cta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.hero-note {
  font-size: 0.86rem;
  color: var(--text-muted);
}

.hero-note strong {
  color: #e5e7eb;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 10px;
}

.hero-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 9px;
  border-radius: var(--radius-full);
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.5);
}

.hero-chip span {
  opacity: 0.95;
}

.hero-chip-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
}

.hero-chip-dot--ru {
  background: linear-gradient(to bottom, #f97373 0, #fff 50%, #3b82f6 100%);
}

.hero-chip-dot--en {
  background: linear-gradient(45deg, #22c55e, #38bdf8, #6366f1);
}

.hero-chip-dot--multi {
  background: conic-gradient(
    from 0deg,
    #22c55e,
    #eab308,
    #0ea5e9,
    #6366f1,
    #ec4899,
    #22c55e
  );
}

.hero-list-title {
  margin: 20px 0 8px;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-muted);
}

.hero-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

.hero-list-item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.9rem;
  color: var(--text-main);
}

.hero-list-bullet {
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.16);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #e0f2fe;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.hero-list-text small {
  display: block;
  color: var(--text-muted);
  margin-top: 2px;
  font-size: 0.78rem;
}

.section {
  background: radial-gradient(circle at top right, #020617, #020617 55%);
  border-radius: 24px;
  padding: 26px 26px 22px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: var(--shadow-soft);
}

.section--features {
  background: radial-gradient(circle at top left, #020617, #020617 55%);
}

.section--subscribe {
  background: radial-gradient(circle at center top, #020617, #020617 55%);
}

.section--audience {
  background: radial-gradient(circle at bottom right, #020617, #020617 55%);
}

.section--cta {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.18), rgba(15, 23, 42, 0.98));
  border-radius: 26px;
  border: 1px solid rgba(56, 189, 248, 0.6);
  box-shadow: var(--shadow-glow);
}

.section-header {
  margin-bottom: 18px;
  max-width: 38rem;
}

.section-kicker {
  font-size: 0.77rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-muted);
  margin: 0 0 6px;
}

.section-title {
  font-size: 1.6rem;
  letter-spacing: -0.03em;
  margin: 0 0 6px;
}

.section-subtitle {
  margin: 0;
  font-size: 0.96rem;
  color: var(--text-muted);
}

.section-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.section-cta-inner .section-title {
  font-size: 1.4rem;
}

.section-cta-inner .section-subtitle {
  max-width: 24rem;
}

.panel-right {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.panel {
  background: radial-gradient(circle at top right, #020617, #020617 50%);
  border-radius: 24px;
  border: 1px solid var(--border-subtle);
  padding: 18px 18px 16px;
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.panel-heading > div {
  flex: 1;
}

.panel-heading > .btn {
  flex-shrink: 0;
}

.panel-title {
  font-size: 0.96rem;
  font-weight: 600;
}

.panel-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.qr-layout {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: flex-start;
}

@media (max-width: 640px) {
  .qr-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

.qr-box {
  background: radial-gradient(circle at top, #020617, #020617 55%);
  border-radius: 20px;
  padding: 10px 10px 8px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
}

.qr-box img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 280px;
  border-radius: 24px;
}

.qr-caption {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
}

.qr-caption strong {
  color: #e5e7eb;
}

.qr-url {
  margin-top: 10px;
  padding: 8px 10px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.6);
  font-size: 0.84rem;
  color: #e0f2fe;
  text-align: center;
  word-break: break-all;
}

.qr-url a {
  color: #e0f2fe;
  text-decoration: underline;
  text-decoration-style: dotted;
  text-decoration-thickness: 1px;
}

.bot-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: center;
}

@media (max-width: 640px) {
  .bot-card {
    grid-template-columns: minmax(0, 1fr);
  }
}

.bot-avatar {
  width: 82px;
  height: 82px;
  border-radius: 26px;
  padding: 6px;
  background: radial-gradient(circle at 30% 0, #e0f2fe, #1d293b 60%, #020617);
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
}

.bot-avatar img {
  width: 100%;
  height: 100%;
  border-radius: 22px;
  display: block;
}

.bot-copy-title {
  font-size: 0.96rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.bot-copy-sub {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.bot-copy-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 4px;
  font-size: 0.82rem;
  color: var(--text-main);
}

.bot-copy-list li::before {
  content: "•";
  color: var(--primary);
  display: inline-block;
  width: 0.9em;
  margin-left: -0.6em;
}

footer {
  margin-top: 30px;
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  border-top: 1px solid rgba(30, 64, 175, 0.7);
  padding-top: 14px;
}

.footer-note strong {
  color: #e5e7eb;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.78rem;
}

.footer-links a:hover {
  color: var(--primary);
}