:root {
  color-scheme: dark;
  --bg: #080c11;
  --surface: #111820;
  --surface-strong: #17212b;
  --text: #f5f2ea;
  --muted: #a8b2bf;
  --line: #263442;
  --accent: #ffc800;
  --accent-strong: #f49a00;
  --success: #57d18c;
  --danger: #ff766f;
  --radius: 16px;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 15% 0%, rgba(255, 200, 0, 0.08), transparent 28rem),
    radial-gradient(circle at 100% 30%, rgba(87, 209, 140, 0.04), transparent 32rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--accent);
  color: #111820;
  font-weight: 800;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(38, 52, 66, 0.8);
  background: rgba(8, 12, 17, 0.86);
  backdrop-filter: blur(18px);
}

.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 200, 0, 0.5);
  border-radius: 12px;
  background: linear-gradient(145deg, rgba(255, 200, 0, 0.18), rgba(255, 200, 0, 0.04));
  color: var(--accent);
  font-size: 13px;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px 22px;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a[aria-current="page"] {
  color: var(--accent);
}

.hero {
  padding: 104px 0 82px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  align-items: center;
  gap: 70px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.14;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 780px;
  margin-bottom: 22px;
  font-size: clamp(42px, 7vw, 76px);
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(28px, 4vw, 44px);
}

h3 {
  margin-bottom: 10px;
  font-size: 19px;
}

.lead {
  max-width: 700px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 22px);
}

.hero-copy .lead + p {
  max-width: 680px;
  margin: 20px 0 0;
  color: var(--muted);
}

.actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 19px;
  border: 1px solid var(--accent);
  border-radius: 10px;
  background: var(--accent);
  color: #111820;
  text-decoration: none;
  font-weight: 900;
  transition: transform 160ms ease, background 160ms ease;
}

.button:hover,
.button:focus-visible {
  background: #ffd633;
  transform: translateY(-2px);
}

.button.secondary {
  border-color: var(--line);
  background: var(--surface);
  color: var(--text);
}

.button.secondary:hover,
.button.secondary:focus-visible {
  border-color: var(--accent);
  background: var(--surface-strong);
}

.button.disabled {
  border-color: var(--line);
  background: transparent;
  color: var(--muted);
  cursor: default;
  transform: none;
}

.device-card {
  position: relative;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 30px;
  background: linear-gradient(155deg, #17212b, #0c1218 72%);
  box-shadow: var(--shadow);
}

.device-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  z-index: -1;
  border-radius: inherit;
  background: linear-gradient(145deg, rgba(255, 200, 0, 0.45), transparent 38%);
  filter: blur(12px);
  opacity: 0.35;
}

.device-top {
  display: flex;
  justify-content: space-between;
  margin-bottom: 26px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.measurement {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(8, 12, 17, 0.7);
}

.measurement-label {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.measurement-value {
  margin: 4px 0 18px;
  color: var(--accent);
  font-size: 46px;
  font-weight: 950;
  letter-spacing: -0.05em;
}

.measurement-value span {
  font-size: 19px;
  letter-spacing: 0;
}

.meter {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--surface-strong);
}

.meter span {
  width: 68%;
  height: 100%;
  display: block;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent-strong), var(--accent));
}

.device-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.device-row {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 13px 15px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.035);
  color: var(--muted);
  font-size: 13px;
}

.device-row strong {
  color: var(--text);
}

.section {
  padding: 78px 0;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 34px;
}

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

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-card {
  min-height: 190px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(155deg, rgba(23, 33, 43, 0.88), rgba(17, 24, 32, 0.78));
}

.feature-index {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  margin-bottom: 36px;
  border-radius: 9px;
  background: rgba(255, 200, 0, 0.12);
  color: var(--accent);
  font-size: 12px;
  font-weight: 900;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.safety {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 22px;
  padding: 30px;
  border: 1px solid rgba(255, 200, 0, 0.35);
  border-radius: var(--radius);
  background: rgba(255, 200, 0, 0.055);
}

.safety-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: #111820;
  font-weight: 950;
}

.safety h2 {
  margin-bottom: 8px;
  font-size: 24px;
}

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

.cta {
  padding: 44px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(255, 200, 0, 0.12), rgba(17, 24, 32, 0.8) 58%);
}

.cta p {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
}

.page-hero {
  padding: 76px 0 42px;
}

.page-hero h1 {
  margin-bottom: 16px;
  font-size: clamp(38px, 6vw, 62px);
}

.page-hero .lead {
  font-size: 19px;
}

.legal-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  align-items: start;
  gap: 54px;
  padding-bottom: 90px;
}

.legal {
  min-width: 0;
}

.legal section {
  padding: 30px 0;
  border-top: 1px solid var(--line);
}

.legal section:first-child {
  border-top: 0;
  padding-top: 0;
}

.legal h2 {
  font-size: 25px;
}

.legal h3 {
  margin-top: 24px;
  font-size: 18px;
}

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

.legal strong {
  color: var(--text);
}

.legal a,
.contact-card a {
  color: var(--accent);
  text-underline-offset: 4px;
}

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

.legal li + li {
  margin-top: 8px;
}

.side-card {
  position: sticky;
  top: 108px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.side-card h2 {
  margin-bottom: 12px;
  font-size: 17px;
}

.side-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.side-card p + p {
  margin-top: 12px;
}

.contact-card {
  max-width: 760px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.contact-card dl {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 16px 24px;
  margin: 0;
}

.contact-card dt {
  color: var(--muted);
  font-weight: 700;
}

.contact-card dd {
  margin: 0;
  color: var(--text);
  font-weight: 800;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(8, 12, 17, 0.7);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  padding: 42px 0;
}

.footer-copy p {
  max-width: 550px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-content: start;
  gap: 10px 24px;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--accent);
}

.footer-bottom {
  padding: 18px 0 28px;
  border-top: 1px solid rgba(38, 52, 66, 0.65);
  color: var(--muted);
  font-size: 12px;
}

:focus-visible {
  outline: 3px solid rgba(255, 200, 0, 0.45);
  outline-offset: 3px;
}

@media (max-width: 860px) {
  .nav {
    padding: 14px 0;
    align-items: flex-start;
  }

  .nav-links {
    max-width: 440px;
  }

  .hero {
    padding-top: 74px;
  }

  .hero-grid,
  .legal-wrap {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 48px;
  }

  .device-card {
    width: min(100%, 520px);
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .legal-wrap {
    gap: 20px;
  }

  .side-card {
    position: static;
    grid-row: 1;
  }
}

@media (max-width: 620px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .nav {
    display: block;
  }

  .nav-links {
    justify-content: flex-start;
    margin-top: 14px;
    gap: 8px 16px;
  }

  .hero {
    padding: 56px 0 54px;
  }

  .feature-grid,
  .footer-grid,
  .footer-links {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 54px 0;
  }

  .feature-card {
    min-height: 0;
  }

  .feature-index {
    margin-bottom: 24px;
  }

  .safety {
    grid-template-columns: 1fr;
    padding: 24px;
  }

  .cta,
  .contact-card {
    padding: 24px;
  }

  .contact-card dl {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .contact-card dd + dt {
    margin-top: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}