:root {
  --buin-primary: #6eb5ed;
  --buin-dark: #343434;
  --buin-bg: #f6f9fc;
  --buin-text: #222;
  --buin-muted: #666;
  --buin-border: #e6edf3;
  --buin-white: #fff;
  --buin-radius: 22px;
  --buin-shadow: 0 18px 45px rgba(52, 52, 52, .10);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--buin-text);
  background: var(--buin-bg);
  line-height: 1.55;
}

a {
  text-decoration: none;
}

.page {
  overflow: hidden;
}

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
}

.hero {
  background:
    radial-gradient(circle at top right, rgba(110, 181, 237, .35), transparent 35%),
    linear-gradient(135deg, #343434 0%, #252525 100%);
  color: #fff;
  padding: 72px 20px 90px;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 70px;
}

.nav-logo {
  height: 36px;
}

.nav-cta,
.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  padding: 14px 24px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform .15s ease, box-shadow .15s ease;
}

.nav-cta {
  padding: 12px 20px;
  background: var(--buin-primary);
  color: var(--buin-dark);
}

.btn:hover,
.nav-cta:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--buin-primary);
  color: var(--buin-dark);
  box-shadow: 0 12px 28px rgba(110, 181, 237, .32);
}

.btn-secondary {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .28);
  background: rgba(255, 255, 255, .08);
}

.btn-outline {
  color: #fff;
  border: 2px solid rgba(255, 255, 255, .4);
  background: transparent;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 52px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, .10);
  border: 1px solid rgba(255, 255, 255, .18);
  padding: 8px 13px;
  border-radius: 999px;
  font-size: 14px;
  margin-bottom: 22px;
}

h1 {
  font-size: clamp(36px, 5.5vw, 62px);
  line-height: 1.04;
  margin: 0 0 24px;
  letter-spacing: -2px;
}

.hero p {
  font-size: 19px;
  color: rgba(255, 255, 255, .82);
  max-width: 660px;
  margin: 0 0 34px;
}

.actions,
.cta-btns {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-card {
  background: rgba(255, 255, 255, .10);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 28px;
  padding: 26px;
  box-shadow: var(--buin-shadow);
  backdrop-filter: blur(12px);
}

.mock-window {
  background: #fff;
  color: var(--buin-dark);
  border-radius: 20px;
  padding: 20px;
}

.mock-top {
  display: flex;
  gap: 7px;
  margin-bottom: 18px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #ddd;
}

.metric {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  padding: 14px;
  border: 1px solid var(--buin-border);
  border-radius: 16px;
  margin-bottom: 10px;
  background: #fafcff;
}

.metric strong {
  display: block;
  font-size: 15px;
}

.metric span {
  color: var(--buin-muted);
  font-size: 13px;
}

section {
  padding: 76px 20px;
}

.integrations {
  background: #fff;
  border-top: 1px solid var(--buin-border);
  border-bottom: 1px solid var(--buin-border);
}

.integrations-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.integrations-inner span {
  color: var(--buin-muted);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}

.integrations-inner img {
  height: 28px;
  opacity: .8;
}

.section-tag {
  display: inline-block;
  background: rgba(110, 181, 237, .15);
  color: #2a7dbf;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.section-title {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-title h2 {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.12;
  margin: 0 0 14px;
  color: var(--buin-dark);
  letter-spacing: -1px;
}

.section-title p {
  color: var(--buin-muted);
  font-size: 18px;
  margin: 0;
}

.split {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 34px;
  align-items: center;
}

.highlight {
  background: var(--buin-dark);
  color: #fff;
  border-radius: 30px;
  padding: 38px;
  box-shadow: var(--buin-shadow);
}

.highlight h2 {
  margin: 0 0 14px;
  font-size: 34px;
  line-height: 1.12;
}

.highlight p {
  color: rgba(255, 255, 255, .78);
  font-size: 18px;
  margin: 0 0 18px;
}

.card {
  background: var(--buin-white);
  border: 1px solid var(--buin-border);
  border-radius: var(--buin-radius);
  padding: 26px;
  box-shadow: 0 10px 28px rgba(52, 52, 52, .06);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 19px;
  color: var(--buin-dark);
}

.card p {
  margin: 0;
  color: var(--buin-muted);
}

.problem-grid,
.features-grid,
.benefits-grid,
.audience-grid,
.related-grid {
  display: grid;
  gap: 18px;
}

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

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

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

.check-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 13px;
}

.check-list li {
  background: #fff;
  border: 1px solid var(--buin-border);
  border-radius: 16px;
  padding: 15px 17px;
  color: var(--buin-dark);
  font-weight: 650;
}

.check-list li::before {
  content: "OK";
  color: var(--buin-primary);
  font-weight: 900;
  margin-right: 10px;
}

.faq-grid {
  display: grid;
  gap: 14px;
  max-width: 820px;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--buin-border);
  border-radius: 18px;
  overflow: hidden;
}

.faq-item summary {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 17px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 22px;
  color: var(--buin-primary);
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item[open] summary::after {
  content: "-";
}

.faq-body {
  padding: 0 24px 20px;
  color: var(--buin-muted);
  font-size: 16px;
  line-height: 1.6;
}

.related-card {
  display: block;
}

.cta-final {
  background: linear-gradient(135deg, #343434 0%, #1f1f1f 100%);
  color: #fff;
  text-align: center;
  padding: 80px 20px;
}

.cta-final h2 {
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.1;
  margin: 0 0 16px;
}

.cta-final p {
  color: rgba(255, 255, 255, .78);
  max-width: 680px;
  margin: 0 auto 28px;
  font-size: 19px;
}

.footer {
  padding: 28px 20px;
  text-align: center;
  color: var(--buin-muted);
  background: #fff;
  border-top: 1px solid var(--buin-border);
}

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

@media (max-width: 900px) {
  .hero-grid,
  .split {
    grid-template-columns: 1fr;
  }

  .problem-grid,
  .features-grid,
  .benefits-grid,
  .audience-grid,
  .related-grid {
    grid-template-columns: 1fr 1fr;
  }

  .nav {
    margin-bottom: 44px;
  }
}

@media (max-width: 620px) {
  .hero {
    padding-top: 34px;
  }

  .problem-grid,
  .features-grid,
  .benefits-grid,
  .audience-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }

  .nav {
    align-items: flex-start;
    gap: 14px;
    flex-direction: column;
  }

  .actions,
  .cta-btns {
    flex-direction: column;
  }

  .btn,
  .nav-cta {
    width: 100%;
  }
}