:root {
  --bg: #1c1e21;
  --surface: #282828;
  --card: #2e3136;
  --line: #3c4046;
  --text: #e8eef2;
  --muted: #b7c2cc;
  --faint: #9aa4b0;
  --accent: #2eabec;
  --accent-hover: #57c0f1;
  --ink: #06202c;
  --danger: #ffb4b4;
  --ok: #b7ebc8;
  --header: 76px;
  --radius: 18px;
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-padding-top: calc(var(--header) + 12px);
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(ellipse 70% 42% at 100% -8%, rgba(46, 171, 236, 0.16), transparent 52%),
    radial-gradient(ellipse 46% 36% at -12% 8%, rgba(46, 171, 236, 0.08), transparent 46%),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
}

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

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

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

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

::selection {
  background: var(--accent);
  color: var(--ink);
}

.skip {
  position: absolute;
  left: 16px;
  top: -40px;
  background: var(--accent);
  color: var(--ink);
  padding: 8px 12px;
  z-index: 40;
}

.skip:focus {
  top: 12px;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(28, 30, 33, 0.94);
  border-top: 3px solid var(--accent);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(14px);
}

.bar {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  min-height: var(--header);
}

.logo {
  order: 1;
  margin-right: auto;
  line-height: 0;
}

.logo img {
  width: 150px;
  height: auto;
}

.header-phone {
  order: 2;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.header-phone:hover {
  color: var(--accent);
}

.nav-check {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
}

.nav-toggle {
  order: 3;
  position: relative;
  width: 44px;
  height: 44px;
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 10px;
  border-radius: 10px;
  cursor: pointer;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.nav-toggle span:not(.visually-hidden) {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.15s ease;
}

.nav-check:focus-visible + .nav-toggle {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.nav-check:checked + .nav-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-check:checked + .nav-toggle span:nth-child(2) {
  opacity: 0;
}

.nav-check:checked + .nav-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  order: 4;
  display: none;
  flex-basis: 100%;
  flex-direction: column;
  gap: 4px;
  padding: 4px 0 16px;
}

.nav-check:checked ~ .site-nav {
  display: flex;
}

.site-nav a {
  color: var(--text);
  text-decoration: none;
  padding: 10px 0;
  font-weight: 500;
}

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

.hero {
  padding: 64px 0 28px;
}

.hero-grid,
.split,
.band-grid,
.footer-grid,
.two,
.metric-grid,
.layer-grid,
.output-grid {
  display: grid;
  gap: 28px;
}

.kicker,
.section-kicker {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 16px;
  font-size: clamp(2rem, 4.4vw, 3.45rem);
  line-height: 1.12;
  letter-spacing: -0.035em;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(1.55rem, 2.6vw, 2.15rem);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.lead,
.card p,
.prose p,
.hero-card p,
.band p,
.faq p,
.footer-grid p {
  color: var(--muted);
}

.lead {
  max-width: 62ch;
  font-size: 1.08rem;
}

.hero-phone {
  margin: 22px 0;
  font-size: clamp(1.45rem, 2.5vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.hero-phone a {
  color: var(--text);
  text-decoration: none;
}

.hero-phone a:hover {
  color: var(--accent);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: var(--ink);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--ink);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: #545a61;
}

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

.hero-card,
.card,
.faq details,
.metric,
.fact,
.timeline li {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.hero-card {
  padding: 8px 22px;
}

.hero-card ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.hero-card li {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 14px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.hero-card li:first-child {
  border-top: 0;
}

.hero-card .num,
.step {
  color: var(--accent);
  font-weight: 700;
}

.hero-card strong,
.card strong {
  display: block;
  font-weight: 700;
}

.hero-card span,
.card .quiet,
.note,
.caption {
  color: var(--faint);
}

.section {
  padding: 36px 0;
}

.section-head {
  max-width: 68ch;
  margin-bottom: 22px;
}

.cards,
.facts,
.source-list {
  display: grid;
  gap: 16px;
}

.card,
.metric,
.fact {
  padding: 22px;
}

.card h3 a {
  color: inherit;
  text-decoration: none;
}

.card h3 a:hover {
  color: var(--accent);
}

.band {
  margin: 12px 0 28px;
  background: var(--accent);
  color: var(--ink);
}

.band .kicker,
.band p,
.band a {
  color: var(--ink);
}

.band-grid {
  padding: 36px 0;
}

.band ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.band li {
  padding: 12px 0;
  border-top: 1px solid rgba(6, 32, 44, 0.18);
  font-weight: 700;
}

.band .btn-primary {
  background: var(--ink);
  color: var(--text);
}

.band .btn-primary:hover {
  background: #0b3142;
  color: var(--text);
}

.band .btn-ghost {
  color: var(--ink);
  border-color: rgba(6, 32, 44, 0.45);
}

.band .btn-ghost:hover {
  color: var(--ink);
  border-color: var(--ink);
}

.principles {
  display: grid;
  gap: 16px;
}

.principles article {
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

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

.fact dt {
  color: var(--faint);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.fact dd {
  margin: 6px 0 0;
  font-weight: 600;
}

.faq {
  display: grid;
  gap: 10px;
}

.faq details {
  padding: 0 18px;
}

.faq summary {
  cursor: pointer;
  padding: 16px 28px 16px 0;
  font-weight: 700;
  list-style: none;
  position: relative;
}

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

.faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 14px;
  color: var(--accent);
  font-size: 1.3rem;
  line-height: 1;
}

.faq details[open] summary::after {
  content: "–";
}

.faq details p:last-child {
  margin-bottom: 16px;
}

.contact-grid {
  display: grid;
  gap: 22px;
}

.contact-points {
  margin: 0;
  padding: 0;
  list-style: none;
}

.contact-points a {
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
  font-size: 1.25rem;
}

.contact-points a:hover {
  color: var(--accent);
}

.contact-points li + li {
  margin-top: 14px;
}

.shot,
.card-visual,
.product-visual {
  width: 100%;
  height: auto;
  display: block;
  background: #353535;
}

.shot {
  border-radius: 12px;
  margin-bottom: 6px;
}

.card {
  overflow: hidden;
}

.card-visual {
  width: calc(100% + 44px);
  height: auto;
  margin: -22px -22px 18px;
  border-radius: 17px 17px 0 0;
  background: #303030;
}

.product-visual {
  border-radius: 18px;
  border: 1px solid var(--line);
  align-self: center;
}

.hero-card {
  padding: 16px 16px 8px;
}

.site-footer {
  margin-top: 28px;
  padding: 36px 0 28px;
  border-top: 1px solid var(--line);
  background: #17191c;
}

.footer-title {
  margin-bottom: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
}

.footer-grid a {
  display: block;
  color: var(--text);
  text-decoration: none;
  margin: 6px 0;
}

.footer-grid a:hover {
  color: var(--accent);
}

.footer-legal {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 14px;
}

.footer-legal p {
  margin: 0 0 8px;
}

.prose {
  max-width: 76ch;
  padding-bottom: 20px;
}

.prose h1 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
}

.prose h2 {
  margin-top: 1.6em;
  font-size: 1.3rem;
}

.page-intro {
  padding-top: 42px;
}

.layer-grid,
.output-grid,
.metric-grid,
.compliance {
  display: grid;
  gap: 16px;
}

.timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.timeline li {
  padding: 16px 18px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.chips li {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 10px;
  color: var(--muted);
  background: var(--bg);
  font-size: 14px;
}

.caption {
  margin-top: 10px;
  font-size: 14px;
}

@media (min-width: 760px) {
  .cards,
  .facts,
  .principles,
  .metric-grid,
  .output-grid,
  .layer-grid,
  .compliance,
  .two {
    grid-template-columns: 1fr 1fr;
  }

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

  .metric-grid,
  .output-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .contact-grid,
  .hero-grid,
  .band-grid,
  .footer-grid,
  .split {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
  }

  .hero-grid {
    align-items: center;
    gap: 48px;
  }

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

@media (min-width: 980px) {
  .principles,
  .layer-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

@media (min-width: 960px) {
  .nav-check,
  .nav-toggle {
    display: none;
  }

  .logo {
    margin-right: 0;
  }

  .site-nav {
    display: flex;
    flex-direction: row;
    flex-basis: auto;
    order: 2;
    margin-left: auto;
    align-items: center;
    gap: 22px;
    padding: 0;
  }

  .header-phone {
    order: 3;
  }

  .site-nav a {
    padding: 8px 0;
  }
}

@media (max-width: 420px) {
  .logo img {
    width: 124px;
  }

  .header-phone {
    font-size: 14px;
  }
}