/* Matte paper utility — Syne + IBM Plex, ink blue */
:root {
  --bg: #e8edf3;
  --surface: #f7f9fc;
  --ink: #101820;
  --muted: rgba(16, 24, 32, 0.62);
  --soft: rgba(16, 24, 32, 0.42);
  --line: rgba(16, 24, 32, 0.1);
  --accent: #2a63e8;
  --accent-ink: #163a8a;
  --display: "Syne", system-ui, sans-serif;
  --font: "IBM Plex Sans", system-ui, sans-serif;
  --pad: clamp(18px, 4vw, 48px);
  --radius: 16px;
  --shadow: 0 16px 36px rgba(16, 24, 32, 0.1);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(900px 420px at 88% -8%, rgba(42, 99, 232, 0.12), transparent 55%),
    var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.top {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px var(--pad);
  background: rgba(232, 237, 243, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.top.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 22px rgba(16, 24, 32, .06);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.logo-mark {
  border-radius: 10px;
  box-shadow: 0 6px 16px rgba(16, 24, 32, .12);
}
.logo-word {
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.04em;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--muted);
}
.nav a:hover { color: var(--ink); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 12px;
  font: inherit;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 24px rgba(42, 99, 232, .28);
}
.btn-line {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}

.hero {
  width: min(1140px, 100%);
  margin: 0 auto;
  padding: clamp(36px, 6vw, 64px) var(--pad) 28px;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: clamp(24px, 5vw, 48px);
  align-items: center;
}

.eyebrow {
  margin: 0 0 12px;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent-ink);
}
.hero h1 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  line-height: 1.02;
  letter-spacing: -.045em;
}
.lead {
  margin: 16px 0 0;
  max-width: 40ch;
  color: var(--muted);
  font-size: 1.05rem;
  font-weight: 500;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.fine {
  margin: 14px 0 0;
  color: var(--soft);
  font-size: .88rem;
  font-weight: 500;
}

.hero-shot {
  justify-self: end;
  width: min(360px, 100%);
  border-radius: 22px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  background: #101820;
  animation: rise .8s var(--ease) both;
}
.hero-shot img {
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 16;
  object-fit: cover;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}

.strip {
  width: min(1140px, 100%);
  margin: 8px auto 0;
  padding: 0 var(--pad);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
}
.strip > div {
  padding: 18px 16px;
  border-right: 1px solid var(--line);
  color: var(--soft);
  font-size: .9rem;
  font-weight: 500;
}
.strip > div:last-child { border-right: 0; }
.strip b {
  display: block;
  color: var(--ink);
  font-family: var(--display);
  font-size: 1.2rem;
  margin-bottom: 2px;
}

.section-head { margin-bottom: 24px; }
.section-head .kicker {
  margin: 0 0 8px;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--soft);
}
.section-head h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.6rem, 3vw, 2.15rem);
  letter-spacing: -.03em;
}
.section-head p {
  margin: 10px 0 0;
  color: var(--muted);
  max-width: 52ch;
}

.interface,
.how,
.features,
.cases,
.developer,
.faq,
.final-cta,
.legal-brief {
  width: min(1140px, 100%);
  margin: 0 auto;
  padding: clamp(48px, 8vw, 84px) var(--pad) 0;
}

.shot-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.shot-grid figure {
  margin: 0;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #101820;
  box-shadow: var(--shadow);
  transition: transform .25s var(--ease);
}
.shot-grid figure:hover { transform: translateY(-5px); }
.shot-grid img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
}

.flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.flow li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 16px;
  align-items: start;
  padding: 20px 18px;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--line);
}
.flow span {
  font-family: var(--display);
  font-weight: 800;
  color: var(--accent);
  font-size: 1.2rem;
}
.flow h3 { margin: 0 0 6px; font-size: 1.05rem; }
.flow p { margin: 0; color: var(--muted); font-weight: 500; }

.feature-table {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}
.feature-table > div {
  padding: 22px 20px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.feature-table > div:nth-child(2n) { border-right: 0; }
.feature-table > div:nth-last-child(-n+2) { border-bottom: 0; }
.feature-table h3 { margin: 0 0 8px; font-size: 1.05rem; }
.feature-table p { margin: 0; color: var(--muted); font-weight: 500; }

.case-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.case-band article {
  padding: 22px 20px;
  border-radius: var(--radius);
  background: #101820;
  color: #fff;
  min-height: 140px;
}
.case-band h3 { margin: 0 0 8px; }
.case-band p { margin: 0; color: rgba(255,255,255,.62); font-weight: 500; }

.dev-panel {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 18px;
  padding: 24px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
}
.dev-panel h3 { margin: 0 0 8px; font-family: var(--display); }
.dev-panel p { margin: 0; color: var(--muted); font-weight: 500; }
.dev-panel ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.dev-panel a {
  color: var(--accent-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
}

.faq details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0 18px;
  margin-bottom: 10px;
}
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 0;
  font-weight: 700;
}
.faq summary::-webkit-details-marker { display: none; }
.faq details p {
  margin: 0 0 16px;
  color: var(--muted);
  max-width: 64ch;
}

.final-inner {
  padding: clamp(28px, 5vw, 42px);
  border-radius: 20px;
  background: #101820;
  color: #fff;
  display: grid;
  gap: 14px;
  justify-items: start;
}
.final-inner h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.5rem, 3vw, 2rem);
}
.final-inner p {
  margin: 0;
  color: rgba(255,255,255,.62);
  max-width: 44ch;
}

.legal-brief { padding-bottom: 18px; }
.legal-brief h2 { margin: 0 0 10px; font-size: 1.05rem; }
.legal-brief p {
  margin: 0 0 10px;
  color: var(--soft);
  font-size: .9rem;
  max-width: 78ch;
}
.legal-brief a {
  color: var(--accent-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Footer */
.site-foot {
  --f-bg: #0c1016;
  --f-muted: rgba(243,246,250,.52);
  --f-soft: rgba(243,246,250,.34);
  --f-line: rgba(243,246,250,.08);
  margin-top: 28px;
  background:
    radial-gradient(700px 280px at 85% 0%, rgba(42,99,232,.16), transparent 55%),
    var(--f-bg);
  color: #f3f6fa;
}
.site-foot a { color: rgba(243,246,250,.78); transition: color .18s ease; }
.site-foot a:hover { color: #fff; }
.site-foot-inner {
  width: min(1140px, 100%);
  margin: 0 auto;
  padding: 52px var(--pad) 24px;
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr 1fr;
  gap: 28px;
}
.brand-name {
  font-family: var(--display);
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 10px;
}
.brand-name span { color: #6ea0ff; margin-left: .15em; }
.brand-tag {
  margin: 0;
  max-width: 34ch;
  color: var(--f-muted);
  font-size: .92rem;
  font-weight: 500;
}
.foot-mail, .foot-phone {
  display: block;
  margin-top: 10px;
  color: #fff !important;
  font-weight: 600;
}
.foot-phone {
  color: rgba(243,246,250,.78) !important;
  font-weight: 500;
  font-size: .9rem;
}
.foot-col h3 {
  margin: 0 0 14px;
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--f-soft);
}
.foot-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.site-foot-requisites {
  width: min(1140px, 100%);
  margin: 0 auto;
  padding: 0 var(--pad) 16px;
}
.req-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.2fr 1.3fr;
  gap: 14px 18px;
  padding: 16px;
  border-radius: 14px;
  border: 1px solid var(--f-line);
  background: rgba(255,255,255,.03);
  font-size: .82rem;
  color: var(--f-muted);
  line-height: 1.55;
}
.req-grid strong { display: block; color: #fff; margin-bottom: 4px; }
.req-grid > div { display: grid; gap: 4px; }
.site-foot-dev {
  width: min(1140px, 100%);
  margin: 0 auto;
  padding: 0 var(--pad) 16px;
}
.site-foot-dev p {
  margin: 0;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--f-line);
  color: var(--f-soft);
  font-size: .84rem;
  line-height: 1.55;
}
.site-foot-dev strong { color: rgba(243,246,250,.78); }
.site-foot-bottom {
  width: min(1140px, 100%);
  margin: 0 auto;
  padding: 16px var(--pad) 32px;
  border-top: 1px solid var(--f-line);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  justify-content: space-between;
}
.site-foot-bottom p { margin: 0; color: var(--f-soft); font-size: .84rem; }
.foot-legal-row { display: flex; flex-wrap: wrap; gap: 8px 16px; }
.foot-legal-row a { font-size: .84rem; color: var(--f-muted); }

html.cookie-open { overflow: hidden; }
.cookie-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: end center;
  padding: 20px;
  background: rgba(8,12,18,.42);
  backdrop-filter: blur(4px);
}
.cookie-overlay[hidden] { display: none !important; }
.cookie-card {
  width: min(520px, 100%);
  margin-bottom: 20px;
  padding: 22px;
  border-radius: 16px;
  background: #fff;
  color: #101418;
  box-shadow: 0 24px 50px rgba(0,0,0,.3);
}
.cookie-card h2 {
  margin: 0 0 8px;
  font-family: var(--display);
  font-size: 1.15rem;
}
.cookie-card p {
  margin: 0 0 16px;
  color: rgba(16,20,24,.62);
  font-size: .9rem;
  font-weight: 500;
}
.cookie-card a { color: #2a63e8; text-decoration: underline; }
.cookie-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.cookie-actions button {
  appearance: none;
  border-radius: 12px;
  padding: 12px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.btn-necessary {
  border: 1px solid rgba(16,20,24,.14);
  background: #fff;
}
.btn-accept {
  border: 0;
  background: #2a63e8;
  color: #fff;
}

.doc {
  width: min(820px, 100%);
  margin: 0 auto;
  padding: 48px var(--pad) 72px;
}
.doc h1 {
  margin: 0 0 10px;
  font-family: var(--display);
  font-size: clamp(1.7rem, 4vw, 2.3rem);
}
.doc-meta { color: var(--soft); margin: 0 0 24px; }
.doc-body h2 {
  margin: 1.7em 0 .55em;
  font-family: var(--display);
  font-size: 1.15rem;
}
.doc-body p, .doc-body li { color: rgba(16,24,32,.8); }
.doc-body a { color: var(--accent-ink); text-decoration: underline; }

@media (max-width: 980px) {
  .nav { display: none; }
  .hero { grid-template-columns: 1fr; }
  .hero-shot { justify-self: center; width: min(300px, 78vw); order: -1; }
  .strip, .shot-grid, .case-band, .dev-panel, .site-foot-inner, .req-grid {
    grid-template-columns: 1fr 1fr;
  }
  .strip > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .feature-table { grid-template-columns: 1fr; }
  .feature-table > div { border-right: 0; }
  .feature-table > div:nth-last-child(-n+2) { border-bottom: 1px solid var(--line); }
  .feature-table > div:last-child { border-bottom: 0; }
}

@media (max-width: 640px) {
  .strip, .shot-grid, .case-band, .dev-panel, .site-foot-inner, .req-grid, .cookie-actions {
    grid-template-columns: 1fr;
  }
  .flow li { grid-template-columns: 48px 1fr; }
}