:root {
  --blue-900: #071526;
  --blue-800: #0b2748;
  --blue-700: #123a6b;
  --blue-600: #1a5cb8;
  --accent: #4aa3ff;
  --accent-strong: #2b8cff;
  --win-red: #f25022;
  --win-green: #7fba00;
  --win-blue: #00a4ef;
  --win-yellow: #ffb900;
  --text: #f4f8ff;
  --muted: rgba(244, 248, 255, 0.68);
  --card: rgba(14, 42, 78, 0.62);
  --stroke: rgba(170, 206, 255, 0.16);
  --shadow: 0 24px 60px rgba(0, 16, 40, 0.45);
  --radius: 18px;
  --max: 1120px;
  --font: "Segoe UI Variable", "Segoe UI", system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--blue-900);
  line-height: 1.55;
  min-height: 100vh;
}

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

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

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 520px at 50% -10%, rgba(74, 163, 255, 0.28), transparent 60%),
    radial-gradient(700px 420px at 100% 20%, rgba(0, 164, 239, 0.12), transparent 50%),
    radial-gradient(640px 380px at 0% 80%, rgba(127, 186, 0, 0.08), transparent 55%),
    linear-gradient(180deg, #0c2a52 0%, var(--blue-900) 42%, #06101c 100%);
}

.bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.45), transparent 70%);
  pointer-events: none;
}

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

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(22px) saturate(140%);
  background: rgba(7, 21, 38, 0.55);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.header.scrolled {
  border-bottom-color: var(--stroke);
  background: rgba(7, 21, 38, 0.78);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 0 0 1px var(--stroke);
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav a:not(.btn) {
  color: var(--muted);
  font-size: 0.95rem;
}

.nav a:not(.btn):hover {
  color: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: 999px;
  padding: 12px 22px;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn-primary {
  color: #06101c;
  background: linear-gradient(180deg, #7ec4ff, var(--accent-strong));
  box-shadow: 0 8px 24px rgba(43, 140, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(43, 140, 255, 0.45);
}

.btn-ghost {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--stroke);
}

.btn-lg {
  padding: 16px 28px;
  font-size: 1.05rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
  padding: 72px 0 48px;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.kicker::before {
  content: "";
  width: 28px;
  height: 3px;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--win-red), var(--win-green), var(--win-blue), var(--win-yellow));
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(2.4rem, 4.4vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 1.15rem;
  max-width: 36rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.meta {
  color: var(--muted);
  font-size: 0.92rem;
}

.logo-card {
  justify-self: center;
  width: min(100%, 420px);
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow), 0 0 0 1px var(--stroke);
  background: var(--blue-700);
}

.logo-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

.pills {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  padding: 8px 0 64px;
}

.pill {
  padding: 22px 22px 20px;
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.pill h2 {
  margin: 10px 0 8px;
  font-size: 1.15rem;
}

.pill p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-green { background: var(--win-green); }
.dot-blue { background: var(--win-blue); }
.dot-yellow { background: var(--win-yellow); }

section {
  padding: 28px 0 72px;
}

.section-head {
  max-width: 640px;
  margin-bottom: 32px;
}

.section-head h2 {
  margin: 0 0 10px;
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  letter-spacing: -0.02em;
}

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

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

.feature {
  padding: 22px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--stroke);
}

.feature .icon {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  margin-bottom: 14px;
  background: rgba(74, 163, 255, 0.12);
  color: var(--accent);
}

.feature h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 24px 22px 22px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--stroke);
}

.step::before {
  counter-increment: step;
  content: counter(step);
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  margin-bottom: 14px;
  border-radius: 10px;
  background: linear-gradient(180deg, #7ec4ff, var(--accent-strong));
  color: #06101c;
  font-weight: 700;
}

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

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

.download {
  padding-bottom: 48px;
}

.contacts {
  padding-bottom: 96px;
}

.contacts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--stroke);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
  transition: border-color 0.15s ease, transform 0.15s ease, background 0.15s ease;
}

a.contact-card:hover {
  transform: translateY(-1px);
  border-color: rgba(74, 163, 255, 0.45);
  background: rgba(14, 42, 78, 0.78);
}

.contact-card .icon {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  background: rgba(74, 163, 255, 0.12);
  color: var(--accent);
}

.contact-card h3 {
  margin: 0 0 4px;
  font-size: 1.08rem;
}

.contact-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.card-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  margin-top: 6px;
  padding: 8px 12px;
  border: 1px solid var(--stroke);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
}

.card-copy:hover {
  border-color: rgba(74, 163, 255, 0.5);
  background: rgba(74, 163, 255, 0.1);
}

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

.card-copy-number {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-weight: 650;
  letter-spacing: 0.08em;
  font-size: 0.98rem;
}

.card-copy-hint {
  color: var(--muted);
  font-size: 0.78rem;
}

.card-copy.copied {
  background: rgba(127, 186, 0, 0.18);
  border-color: var(--win-green);
  box-shadow: 0 0 0 3px rgba(127, 186, 0, 0.22);
  animation: copied-flash 0.45s ease;
}

.card-copy.copied .card-copy-hint {
  color: #d4f5a0;
  font-weight: 650;
}

@keyframes copied-flash {
  0% { transform: scale(0.98); }
  55% { transform: scale(1.03); }
  100% { transform: scale(1); }
}

.download-card {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  align-items: center;
  padding: 36px;
  border-radius: 28px;
  background:
    linear-gradient(135deg, rgba(26, 92, 184, 0.45), rgba(7, 21, 38, 0.4)),
    rgba(12, 42, 82, 0.7);
  border: 1px solid var(--stroke);
  box-shadow: var(--shadow);
}

.download-card h2 {
  margin: 0 0 10px;
  font-size: 2rem;
}

.download-card p {
  margin: 0 0 22px;
  color: var(--muted);
}

.reqs {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 0.92rem;
}

.reqs li {
  margin: 4px 0;
}

.reqs li::before {
  content: "•";
  color: var(--accent);
  margin-right: 8px;
}

.footer {
  border-top: 1px solid var(--stroke);
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--stroke);
  color: var(--text);
  border-radius: 10px;
  width: 40px;
  height: 40px;
  font-size: 1.2rem;
}

@media (max-width: 960px) {
  .hero,
  .pills,
  .features,
  .steps,
  .download-card,
  .contacts-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 40px;
    gap: 32px;
  }

  .logo-card {
    width: min(100%, 320px);
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: grid;
    place-items: center;
  }

  .nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 20px;
    right: 20px;
    padding: 16px;
    flex-direction: column;
    align-items: stretch;
    background: rgba(7, 21, 38, 0.96);
    border: 1px solid var(--stroke);
    border-radius: 16px;
  }

  .nav.open {
    display: flex;
  }

  .header-inner {
    position: relative;
  }

  .card-copy-number {
    font-size: 0.86rem;
    letter-spacing: 0.04em;
    word-break: break-all;
  }
}