:root {
  --navy-950: #07111f;
  --navy-900: #0b1b31;
  --navy-800: #102946;
  --blue-600: #1d78d2;
  --cyan-400: #33c5f3;
  --cyan-300: #70dcff;
  --text-900: #132033;
  --text-600: #5f6d7f;
  --surface: #ffffff;
  --surface-soft: #f4f8fc;
  --line: #dbe5ef;
  --shadow: 0 24px 70px rgba(4, 22, 42, 0.22);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", Inter, Arial, sans-serif;
  color: var(--text-900);
  background: var(--surface);
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(7, 17, 31, 0.92);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(16px);
}
.nav-wrap { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: #fff; font-weight: 700; }
.brand-mark {
  width: 38px; height: 38px; display: grid; place-items: center;
  border-radius: 10px; color: var(--navy-950); background: linear-gradient(135deg, var(--cyan-300), var(--cyan-400));
  font-size: 13px; letter-spacing: -0.5px;
}
.brand-text { font-size: 20px; }
.site-nav { display: flex; gap: 30px; color: #d7e2ef; font-size: 14px; }
.site-nav a { transition: color .2s ease; }
.site-nav a:hover { color: var(--cyan-300); }

.hero {
  min-height: 760px;
  display: flex;
  align-items: center;
  color: white;
  background:
    radial-gradient(circle at 78% 22%, rgba(51,197,243,.22), transparent 31%),
    radial-gradient(circle at 15% 95%, rgba(29,120,210,.22), transparent 28%),
    linear-gradient(135deg, var(--navy-950) 0%, var(--navy-900) 52%, #0d2743 100%);
}
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 80px; padding: 110px 0 90px; }
.eyebrow, .section-label { margin: 0 0 12px; color: var(--blue-600); font-size: 12px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.hero .eyebrow { color: var(--cyan-300); }
.hero h1 { margin: 0; font-size: clamp(48px, 6vw, 78px); line-height: 1.02; letter-spacing: -.045em; }
.hero-text { max-width: 660px; margin: 26px 0 32px; color: #c7d5e4; font-size: 19px; }
.hero-actions { display: flex; gap: 14px; margin-bottom: 20px; }
.button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 24px; border: 0; border-radius: 10px;
  font: inherit; font-weight: 700; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.button-primary { color: var(--navy-950); background: linear-gradient(135deg, var(--cyan-300), var(--cyan-400)); box-shadow: 0 12px 30px rgba(51,197,243,.24); }
.button-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 38px rgba(51,197,243,.34); }
.button-disabled { width: 100%; color: #8391a1; background: #edf2f6; cursor: not-allowed; }
.version-line { display: flex; align-items: center; gap: 9px; color: #9eb1c6; font-size: 14px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan-400); box-shadow: 0 0 0 5px rgba(51,197,243,.12); }

.hero-panel {
  position: relative; padding: 48px; border: 1px solid rgba(255,255,255,.11); border-radius: 28px;
  background: linear-gradient(155deg, rgba(255,255,255,.1), rgba(255,255,255,.035));
  box-shadow: var(--shadow); overflow: hidden;
}
.hero-panel::after { content: ""; position: absolute; inset: auto -60px -70px auto; width: 190px; height: 190px; border-radius: 50%; background: rgba(51,197,243,.12); }
.app-icon {
  width: 112px; height: 112px; display: grid; place-items: center; margin-bottom: 34px;
  border-radius: 26px; color: #04101e; font-size: 28px; font-weight: 900; letter-spacing: -.05em;
  background: linear-gradient(145deg, #b4efff, var(--cyan-400)); box-shadow: 0 20px 55px rgba(51,197,243,.28);
}
.product-kicker { margin: 0 0 8px; color: var(--cyan-300); font-size: 12px; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.hero-panel h2 { margin: 0 0 16px; font-size: 34px; line-height: 1.14; }
.hero-panel p:not(.product-kicker) { color: #bdcada; }
.release-badge { display: inline-block; margin-top: 16px; padding: 7px 11px; border: 1px solid rgba(112,220,255,.32); border-radius: 999px; color: var(--cyan-300); font-size: 12px; font-weight: 700; }

.section { padding: 105px 0; }
.section-light { background: var(--surface); }
.section-dark { color: white; background: var(--navy-950); }
.section h2 { margin: 0 0 16px; font-size: clamp(36px, 5vw, 54px); line-height: 1.08; letter-spacing: -.035em; }
.section h3 { margin: 0 0 18px; font-size: 22px; }
.section p { color: var(--text-600); font-size: 17px; }
.section-dark p { color: #aebed0; }
.section-label-light { color: var(--cyan-300); }
.two-column { display: grid; grid-template-columns: 1.15fr .85fr; gap: 80px; align-items: start; }
.release-card { padding: 34px; border: 1px solid var(--line); border-radius: 20px; background: var(--surface-soft); box-shadow: 0 18px 45px rgba(14,42,70,.08); }
.release-title { margin: 0; font-size: 13px !important; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.release-version { margin: 4px 0 24px; color: var(--text-900) !important; font-size: 28px !important; font-weight: 800; }
dl { margin: 0 0 26px; }
dl div { display: flex; justify-content: space-between; gap: 20px; padding: 11px 0; border-bottom: 1px solid var(--line); }
dt { color: var(--text-600); }
dd { margin: 0; font-weight: 700; }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 44px; }
.feature-card { min-height: 245px; padding: 30px; border: 1px solid rgba(255,255,255,.1); border-radius: 18px; background: rgba(255,255,255,.045); }
.feature-number { display: inline-block; margin-bottom: 38px; color: var(--cyan-300); font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.feature-card h3 { font-size: 20px; }
.feature-card p { margin-bottom: 0; font-size: 15px; }

.about-wrap { display: grid; grid-template-columns: 1fr auto; gap: 80px; align-items: end; }
.about-lead { margin-top: -6px; color: var(--blue-600) !important; font-weight: 700; }
.about-meta { min-width: 210px; padding-left: 28px; border-left: 3px solid var(--cyan-400); }
.about-meta p { margin: 6px 0; font-size: 15px; }

.site-footer { color: #c0ccda; background: #050d18; border-top: 1px solid rgba(255,255,255,.08); }
.footer-wrap { min-height: 110px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.footer-wrap div { display: flex; flex-direction: column; }
.footer-wrap strong { color: white; font-size: 18px; }
.footer-wrap span, .footer-wrap p { margin: 0; font-size: 13px; }

@media (max-width: 900px) {
  .site-nav { gap: 18px; }
  .hero-grid, .two-column, .about-wrap { grid-template-columns: 1fr; gap: 48px; }
  .hero { min-height: auto; }
  .hero-grid { padding-top: 90px; }
  .hero-panel { max-width: 620px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .about-meta { padding-left: 0; padding-top: 22px; border-left: 0; border-top: 3px solid var(--cyan-400); }
}

@media (max-width: 620px) {
  .container { width: min(100% - 26px, 1120px); }
  .nav-wrap { min-height: 64px; }
  .site-nav { display: none; }
  .hero-grid { padding: 72px 0 66px; }
  .hero h1 { font-size: 46px; }
  .hero-text { font-size: 17px; }
  .hero-panel { padding: 30px; border-radius: 20px; }
  .app-icon { width: 92px; height: 92px; border-radius: 21px; font-size: 23px; }
  .section { padding: 78px 0; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: auto; }
  .footer-wrap { align-items: flex-start; flex-direction: column; justify-content: center; padding: 26px 0; }
}