/* Sellbyx Ring — /landing/v5/. Product page rebuilt from the owner-supplied
   reference (https://newo.ai, 2026-09-13 brief): dark theme, large bold
   headings, generous whitespace, left-aligned blocks, cards, minimal
   gradients. Content is ours only — no invented logos/testimonials/metrics/
   certifications (see KB "Карта клиентских фич для маркетинга"). Flat
   static files, same "own-copy, own-assets" pattern as v2/v3/v4 — no build
   step, no external fonts/CDNs (self-hosted Manrope, see fonts.css). Instead
   of the reference's photography: pure typography + CSS/inline-SVG
   compositions (hero call-card + waveform below). */

:root {
  --bg: #0a0c10;
  --bg-raised: #12151c;
  --card: #12151c;
  --card-border: #232733;
  --ink: #f4f5f8;
  --ink-soft: #9ba1b0;
  --ink-faint: #7d8496;
  --accent: #7c8bff;
  --accent-soft: rgba(124, 139, 255, 0.14);
  --line: #232733;
  --radius: 16px;
  --wrap: 1120px;
  font-size: 16px;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Manrope', system-ui, -apple-system, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-inline: 24px;
}

h1, h2, h3, h4 {
  margin: 0;
  letter-spacing: -0.02em;
  font-weight: 800;
}

h1 {
  font-size: clamp(32px, 4.2vw, 50px);
  line-height: 1.1;
}

h2 {
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.12;
}

h3 {
  font-size: 19px;
  line-height: 1.3;
  font-weight: 700;
}

p {
  margin: 0;
}

.section-kicker {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.section-lead {
  margin-top: 14px;
  max-width: 640px;
  color: var(--ink-soft);
  font-size: 17px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
  background: var(--bg-raised);
  border: 1px solid var(--line);
  padding: 8px 14px;
  border-radius: 999px;
}

.pulse, .live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(124, 139, 255, 0.55); }
  70% { box-shadow: 0 0 0 8px rgba(124, 139, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(124, 139, 255, 0); }
}

/* --- buttons --- */

.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button:focus-visible, a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.button-primary {
  background: var(--accent);
  color: #0a0c10;
  box-shadow: 0 10px 24px rgba(124, 139, 255, 0.28);
}

.button-primary:hover {
  background: #93a0ff;
}

.button-light {
  background: #fff;
  color: #0a0c10;
}

.button-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.button-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.button-ghost-light {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
}

.button-ghost-light:hover {
  border-color: #fff;
}

/* --- header --- */

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-block: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  text-decoration: none;
}

.brand-mark {
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: var(--accent);
}

.nav-links {
  display: flex;
  gap: 26px;
  font-weight: 600;
  font-size: 14px;
}

.nav-links a {
  text-decoration: none;
  color: var(--ink-soft);
}

.nav-links a:hover {
  color: var(--ink);
}

.nav-cta {
  padding: 10px 18px;
  background: var(--ink);
  color: #0a0c10;
}

/* --- hero --- */

.hero {
  padding-block: 56px 60px;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 48px;
  align-items: center;
}

.hero h1 {
  margin-top: 18px;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero-text {
  margin-top: 18px;
  max-width: 560px;
  color: var(--ink-soft);
  font-size: 18px;
}

.hero-actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.badge-row {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
}

/* --- hero art: CSS/SVG call-card composition, no photography --- */

.hero-art {
  display: flex;
  justify-content: center;
}

.call-card {
  width: 100%;
  max-width: 380px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 22px 22px 20px;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.45);
}

.call-card-head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-soft);
}

.call-card-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #5ce08a;
  flex: none;
  animation: pulse 2s infinite;
}

.wave {
  width: 100%;
  height: 56px;
  margin-top: 16px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.call-card-transcript {
  margin-top: 18px;
  display: grid;
  gap: 10px;
}

.call-card-transcript p {
  font-size: 13px;
  line-height: 1.4;
  color: var(--ink-soft);
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
}

.call-card-transcript p span {
  display: block;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 4px;
}

.call-card-transcript p.ai {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--ink);
}

.call-card-transcript p.ai span {
  color: var(--accent);
}

.call-card-footer {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.call-card-tag {
  font-size: 11px;
  font-weight: 700;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 10px;
}

/* --- facts strip (replaces client logos) --- */

.facts {
  padding-block: 30px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.facts-row {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  justify-content: space-between;
}

.facts-row li {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-soft);
}

/* --- generic card grids --- */

.card-grid {
  margin-top: 34px;
  display: grid;
  gap: 18px;
}

.card-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.card-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.scenarios, .capabilities, .how, .integrations, .security {
  padding-block: 56px;
}

.scenario-card, .step-card, .ability-card, .integration-card, .security-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 26px 24px;
}

.scenario-card h3, .step-card h3, .ability-card h3, .integration-card h3, .security-card h3 {
  margin-bottom: 10px;
}

.scenario-card p, .step-card p, .ability-card p, .security-card p {
  color: var(--ink-soft);
  font-size: 15px;
}

.ability-index {
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 12px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 800;
  margin-bottom: 12px;
}

/* full-bleed panel treatment for .capabilities — see .final-cta below for
   the known width:100% + margin-inline overflow trap and its width:auto fix
   (found on v4, fixed there, applied here preemptively). */
.capabilities {
  width: auto;
  background: var(--bg-raised);
  border-radius: 28px;
  margin-inline: 12px;
}

.integration-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.integration-card li {
  font-size: 14px;
  color: var(--ink-soft);
  padding-left: 16px;
  position: relative;
}

.integration-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* --- demo section (reused widget, see index.html's mount script) --- */

.demo-section {
  padding-block: 56px 60px;
}

.demo-head {
  max-width: 620px;
  margin: 0 auto 26px;
  text-align: center;
}

.demo-head .eyebrow {
  justify-content: center;
}

.demo-head h2 {
  margin-top: 14px;
}

.demo-head .section-lead {
  margin-inline: auto;
}

.demo-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 30px 28px 22px;
  max-width: 760px;
  margin: 0 auto;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

.demo-root {
  min-height: 96px;
}

.micro {
  font-size: 12px;
  color: var(--ink-soft);
}

.demo-note {
  text-align: center;
  margin-top: 16px;
}

/* --- final cta --- */

.final-cta {
  /* Same width:100% + margin-inline overflow trap the v4 audit caught
     (width:100% plus margin-inline pushes the box past the viewport on
     mobile — margin sits outside width). width:auto lets margin shrink it
     instead of overflowing. */
  width: auto;
  margin: 20px 12px 40px;
  padding: 64px 24px;
  border-radius: 28px;
  background: linear-gradient(180deg, #171b26, #0f1319);
  border: 1px solid var(--card-border);
  color: #fff;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.final-cta h2 {
  color: #fff;
}

.final-cta h2 em {
  font-style: normal;
  color: var(--accent);
}

.final-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

/* --- footer --- */

.footer-wrap {
  padding-block: 44px 30px;
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 28px;
  padding-bottom: 28px;
}

.footer-brand p {
  margin-top: 12px;
  max-width: 260px;
  color: var(--ink-soft);
  font-size: 14px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col h3 {
  margin: 0 0 4px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.footer-col a {
  text-decoration: none;
  font-size: 14px;
  color: var(--ink-soft);
}

.footer-col a:hover {
  color: var(--ink);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: var(--ink-faint);
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.footer-bottom a {
  text-decoration: none;
}

.footer-bottom a:hover {
  color: var(--ink-soft);
}

/* --- responsive --- */

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .hero-art {
    order: -1;
  }
  .call-card {
    max-width: 460px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 880px) {
  .card-grid-3, .card-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .nav-links {
    display: none;
  }
  .facts-row {
    justify-content: flex-start;
  }
}

@media (max-width: 560px) {
  .card-grid-3, .card-grid-4 {
    grid-template-columns: 1fr;
  }
  .wrap {
    padding-inline: 16px;
  }
  .hero-actions .button,
  .final-cta-actions .button {
    width: 100%;
    justify-content: center;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .final-cta {
    margin-inline: 0;
    border-radius: 0;
  }
  .capabilities {
    margin-inline: 0;
    border-radius: 0;
  }
  .demo-card {
    padding: 18px 12px 14px;
  }
}