:root {
  color-scheme: dark;
  --bg: #0f1322;
  --surface: #171d31;
  --surface-soft: rgba(30, 38, 65, 0.72);
  --border: rgba(148, 163, 184, 0.14);
  --text: #f1f5f9;
  --muted: #a6b0c3;
  --accent: #818cf8;
  --accent-strong: #6366f1;
  --success: #34d399;
  --radius: 18px;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  line-height: 1.65;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 10%, rgba(99, 102, 241, 0.2), transparent 32rem),
    radial-gradient(circle at 85% 70%, rgba(217, 70, 239, 0.1), transparent 28rem),
    var(--bg);
}

a {
  color: var(--accent);
}

.container {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  background: rgba(15, 19, 34, 0.84);
  backdrop-filter: blur(18px);
}

.site-header__inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--text);
  font-size: 1.2rem;
  font-weight: 750;
  text-decoration: none;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
}

.nav a {
  color: var(--muted);
  font-size: 0.92rem;
  text-decoration: none;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--text);
}

.hero {
  padding: 100px 0 78px;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  padding: 7px 12px;
  border: 1px solid rgba(129, 140, 248, 0.32);
  border-radius: 999px;
  color: #c7d2fe;
  background: rgba(99, 102, 241, 0.12);
  font-size: 0.84rem;
  font-weight: 650;
}

h1,
h2,
h3 {
  line-height: 1.2;
}

h1 {
  max-width: 830px;
  margin: 24px auto 18px;
  font-size: clamp(2.45rem, 7vw, 4.8rem);
  letter-spacing: -0.055em;
}

.hero__text {
  max-width: 690px;
  margin: 0 auto;
  color: var(--muted);
  font-size: clamp(1rem, 2.4vw, 1.2rem);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 32px;
}

.product-preview {
  position: relative;
  margin: 54px auto 0;
  padding: 10px;
  border: 1px solid rgba(129, 140, 248, 0.26);
  border-radius: 22px;
  background: rgba(23, 29, 49, 0.72);
  box-shadow: 0 35px 100px rgba(0, 0, 0, 0.42);
}

.product-preview::before {
  content: "";
  position: absolute;
  inset: -20px 12% auto;
  height: 70%;
  z-index: -1;
  background: rgba(99, 102, 241, 0.25);
  filter: blur(70px);
}

.product-preview img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 14px;
}

.product-preview--secondary {
  margin-top: 36px;
}

.product-preview figcaption {
  padding: 4px 4px 14px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  text-align: left;
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  margin-top: 20px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--border);
}

.trust-strip span {
  padding: 15px;
  color: #cbd5e1;
  background: rgba(23, 29, 49, 0.95);
  font-size: 0.92rem;
  font-weight: 650;
  text-align: center;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: 11px;
  color: var(--text);
  background: var(--surface);
  font-weight: 650;
  text-decoration: none;
}

.button--primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent-strong), #8b5cf6);
}

.section {
  padding: 48px 0;
}

.section__heading {
  max-width: 700px;
  margin-bottom: 28px;
}

.section__heading h2 {
  margin: 0 0 10px;
  font-size: clamp(1.8rem, 4vw, 2.65rem);
  letter-spacing: -0.035em;
}

.section__heading p,
.muted {
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-soft);
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0 0 9px;
}

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

.privacy-band {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 30px;
  align-items: center;
  padding: 32px;
  border: 1px solid rgba(52, 211, 153, 0.24);
  border-radius: var(--radius);
  background: rgba(16, 185, 129, 0.07);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  counter-reset: steps;
}

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

.step {
  position: relative;
  padding: 28px 24px 24px;
  border-top: 1px solid var(--border);
  counter-increment: steps;
}

.step::before {
  content: "0" counter(steps);
  display: block;
  margin-bottom: 16px;
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.step h3 {
  margin: 0 0 8px;
}

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

.step code {
  color: #c7d2fe;
}

.faq {
  display: grid;
  gap: 12px;
}

.faq details {
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(23, 29, 49, 0.65);
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
}

.faq p {
  margin: 12px 0 0;
  color: var(--muted);
}

.final-cta {
  padding: 42px;
  border: 1px solid rgba(129, 140, 248, 0.28);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 90% 10%, rgba(139, 92, 246, 0.24), transparent 22rem),
    var(--surface-soft);
  text-align: center;
  box-shadow: var(--shadow);
}

.final-cta h2 {
  margin: 0 0 10px;
  font-size: clamp(1.8rem, 4vw, 2.7rem);
}

.final-cta p {
  max-width: 650px;
  margin: 0 auto;
  color: var(--muted);
}

.final-cta .hero__actions {
  margin-top: 22px;
}

.privacy-band h2,
.privacy-band p {
  margin-top: 0;
}

.privacy-points {
  display: grid;
  gap: 10px;
  color: #cbd5e1;
}

.privacy-points span::before {
  content: "✓";
  margin-right: 9px;
  color: var(--success);
}

.content-page {
  width: min(820px, calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0 90px;
}

.content-page h1 {
  margin: 0 0 12px;
  font-size: clamp(2.2rem, 6vw, 3.7rem);
}

.content-page h2 {
  margin-top: 38px;
  font-size: 1.35rem;
}

.content-page p,
.content-page li {
  color: #cbd5e1;
}

.content-page ul,
.content-page ol {
  padding-left: 22px;
}

.callout {
  margin: 28px 0;
  padding: 18px 20px;
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  background: rgba(99, 102, 241, 0.1);
}

.site-footer {
  margin-top: 60px;
  padding: 30px 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px;
}

@media (max-width: 760px) {
  .site-header__inner {
    padding: 12px 0;
    align-items: flex-start;
  }

  .nav {
    gap: 10px 14px;
  }

  .hero {
    padding-top: 70px;
  }

  .grid,
  .privacy-band,
  .steps {
    grid-template-columns: 1fr;
  }

  .trust-strip {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .site-header__inner {
    display: block;
  }

  .nav {
    justify-content: flex-start;
    margin-top: 10px;
  }
}