:root {
  --bg: #07111f;
  --bg-soft: #0d1c31;
  --panel: #10233d;
  --panel-soft: #f5f8fc;
  --panel-muted: #e9f0f8;
  --text: #10243f;
  --text-on-dark: #eef4fb;
  --muted: #6b7f97;
  --line: #d4e0ec;
  --brand: #0f65c6;
  --brand-dark: #0a4d9a;
  --brand-green: #0f8a4b;
  --brand-red: #c33d2f;
  --shadow: 0 18px 44px rgba(8, 19, 36, 0.12);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background: #f3f7fb;
  line-height: 1.55;
}

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

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

.container {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(12px);
  background: rgba(7, 17, 31, 0.9);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: var(--text-on-dark);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand img {
  width: 160px;
  height: auto;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.nav-links a {
  color: rgba(238, 244, 251, 0.88);
  font-size: 14px;
}

.hero {
  padding: 74px 0 48px;
  background:
    radial-gradient(circle at top right, rgba(15, 101, 198, 0.24), transparent 28%),
    linear-gradient(180deg, var(--bg), #0d1930 66%, #10243f 100%);
  color: var(--text-on-dark);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 12px;
  font-weight: 700;
  color: #8fc0ff;
}

.hero h1,
.section-heading h2,
.cta-copy h2 {
  margin: 0 0 18px;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: clamp(40px, 6vw, 66px);
  max-width: 14ch;
}

.hero-text,
.section-heading p,
.cta-copy p {
  color: rgba(238, 244, 251, 0.85);
  max-width: 66ch;
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

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

.btn-primary {
  background: var(--brand-green);
  color: #fff;
  box-shadow: 0 10px 28px rgba(15, 138, 75, 0.28);
}

.btn-primary:hover {
  background: #0c7740;
}

.btn-secondary {
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--text-on-dark);
  background: rgba(255, 255, 255, 0.04);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
}

.hero-points,
.download-points {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.hero-points li,
.download-points li {
  position: relative;
  padding-left: 18px;
  color: rgba(238, 244, 251, 0.88);
}

.hero-points li::before,
.download-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #74d39d;
}

.hero-visual {
  position: relative;
  min-height: 680px;
}

.hero-card {
  overflow: hidden;
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-card img {
  width: 100%;
  object-fit: cover;
}

.hero-card-main {
  width: min(100%, 430px);
  margin-left: auto;
}

.hero-card-float {
  position: absolute;
  left: 0;
  bottom: 38px;
  width: min(74%, 360px);
}

.trust-strip {
  position: relative;
  z-index: 2;
  margin-top: -28px;
}

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

.trust-item,
.stat-card,
.feature-card,
.badge-card,
.compare-card,
.gallery-card,
.architecture-node,
.value-card {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.trust-item {
  padding: 22px 20px;
}

.trust-item strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
}

.trust-item span {
  color: var(--muted);
  font-size: 14px;
}

.stats-section,
.section {
  padding: 88px 0;
}

.stats-grid,
.feature-grid,
.privacy-badges,
.gallery-grid,
.value-grid {
  display: grid;
  gap: 20px;
}

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

.stat-card {
  padding: 26px 22px;
  text-align: left;
}

.stat-value {
  font-size: 32px;
  font-weight: 800;
  color: var(--brand);
  margin-bottom: 8px;
}

.stat-label {
  color: var(--muted);
}

.section-heading {
  margin-bottom: 34px;
}

.section-heading h2 {
  font-size: clamp(32px, 4vw, 50px);
  color: var(--text);
}

.section-heading p {
  color: var(--muted);
  max-width: 72ch;
}

.section-heading.narrow {
  max-width: 760px;
}

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

.feature-card {
  padding: 28px 24px;
  border: 1px solid var(--line);
}

.feature-card h3,
.compare-card h3,
.value-card h3,
.flow-step h3,
.architecture-node h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.feature-card p,
.compare-card li,
.value-card p,
.flow-step p,
.architecture-node p,
.gallery-card figcaption {
  color: var(--muted);
}

.section-dark {
  background:
    radial-gradient(circle at top left, rgba(15, 101, 198, 0.22), transparent 24%),
    linear-gradient(180deg, #081523 0%, #0d1c31 100%);
  color: var(--text-on-dark);
}

.section-dark .section-heading h2,
.section-dark .section-heading p {
  color: var(--text-on-dark);
}

.section-dark .section-heading p {
  color: rgba(238, 244, 251, 0.82);
}

.privacy-badges {
  grid-template-columns: repeat(5, 1fr);
  margin-bottom: 28px;
}

.badge-card {
  padding: 18px 16px;
  text-align: center;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-on-dark);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.compare-card {
  padding: 28px 24px;
}

.compare-card ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 12px;
}

.compare-card-old {
  background: rgba(255, 255, 255, 0.92);
}

.compare-card-new {
  background: #eff8f2;
  border: 1px solid rgba(15, 138, 75, 0.18);
}

.gallery-grid {
  grid-template-columns: 1.2fr 0.8fr 0.8fr;
  align-items: start;
}

.gallery-card {
  overflow: hidden;
  border: 1px solid var(--line);
}

.gallery-card img {
  width: 100%;
}

.gallery-card figcaption {
  padding: 16px 18px 18px;
  font-size: 14px;
}

.gallery-card-wide {
  grid-row: span 2;
}

.section-accent {
  background: linear-gradient(180deg, #edf5ff 0%, #f7fbff 100%);
}

.flow-rail {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 18px;
  align-items: center;
  margin-bottom: 32px;
}

.flow-step {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}

.flow-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 14px;
}

.flow-arrow {
  color: var(--brand);
  font-weight: 800;
  font-size: 20px;
}

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

.architecture-node {
  padding: 28px 24px;
  border: 1px solid var(--line);
}

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

.value-card {
  padding: 28px 24px;
  border: 1px solid var(--line);
}

.cta-section {
  padding-top: 24px;
}

.cta-card {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: center;
  background: linear-gradient(135deg, var(--bg) 0%, var(--bg-soft) 100%);
  color: var(--text-on-dark);
  border-radius: calc(var(--radius-xl) + 6px);
  padding: 44px;
  box-shadow: 0 30px 70px rgba(7, 17, 31, 0.24);
}

.cta-visual {
  display: flex;
  justify-content: center;
}

.cta-visual img {
  width: min(100%, 240px);
  filter: drop-shadow(0 18px 30px rgba(0, 0, 0, 0.28));
}

.site-footer {
  padding: 28px 0 40px;
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 14px;
}

.footer-grid p {
  margin: 6px 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

@media (max-width: 1100px) {
  .hero-grid,
  .cta-card {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: auto;
    display: grid;
    gap: 20px;
  }

  .hero-card-main,
  .hero-card-float {
    position: static;
    width: 100%;
    margin-left: 0;
  }

  .trust-grid,
  .stats-grid,
  .feature-grid,
  .privacy-badges,
  .value-grid,
  .architecture-card {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-grid {
    grid-template-columns: 1fr 1fr;
  }

  .gallery-card-wide {
    grid-column: 1 / -1;
    grid-row: auto;
  }
}

@media (max-width: 860px) {
  .nav {
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 0;
  }

  .nav-links {
    gap: 14px;
  }

  .flow-rail {
    grid-template-columns: 1fr;
  }

  .flow-arrow {
    justify-self: center;
    transform: rotate(90deg);
  }

  .compare-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(calc(100% - 28px), var(--max));
  }

  .trust-grid,
  .stats-grid,
  .feature-grid,
  .privacy-badges,
  .gallery-grid,
  .value-grid,
  .architecture-card {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 42px;
  }

  .stats-section,
  .section {
    padding: 66px 0;
  }

  .cta-card {
    padding: 32px 22px;
  }

  .brand img {
    width: 138px;
  }

  .footer-grid {
    flex-direction: column;
    align-items: flex-start;
  }
}