:root {
  color-scheme: dark;
  --bg: #050712;
  --panel: #101426;
  --panel-2: #171c31;
  --text: #f4f7ff;
  --muted: #a8b2cc;
  --line: rgba(123, 150, 255, 0.28);
  --blue: #1f66ff;
  --violet: #8e5cff;
  --cyan: #39d8ff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 76% 14%, rgba(63, 99, 255, 0.28), transparent 28rem),
    radial-gradient(circle at 18% 20%, rgba(142, 92, 255, 0.16), transparent 24rem),
    linear-gradient(180deg, #080b18 0%, var(--bg) 48%, #07091a 100%);
  color: var(--text);
  font-family: Inter, "Segoe UI", Arial, sans-serif;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(5, 7, 18, 0.78);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
}

.brand img {
  width: 38px;
  height: 38px;
  border: 1px solid rgba(87, 118, 255, 0.62);
  border-radius: 12px;
  box-shadow: 0 0 30px rgba(31, 102, 255, 0.34);
}

nav {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

nav a:hover {
  color: var(--text);
}

main {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: clamp(28px, 7vw, 84px);
  align-items: center;
  min-height: calc(100vh - 76px);
  padding: 72px 0 60px;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(56px, 9vw, 120px);
  line-height: 0.88;
  letter-spacing: 0;
}

.hero p {
  max-width: 720px;
  margin: 28px 0 0;
  color: #d9e2ff;
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  font-weight: 900;
}

.button.primary {
  border-color: rgba(87, 118, 255, 0.85);
  background: linear-gradient(135deg, var(--blue), var(--violet));
  box-shadow: 0 18px 50px rgba(48, 80, 255, 0.32);
}

.hero-mark {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 34px;
  background:
    linear-gradient(145deg, rgba(31, 102, 255, 0.22), rgba(142, 92, 255, 0.1)),
    rgba(255, 255, 255, 0.04);
  box-shadow: 0 32px 90px rgba(0, 0, 0, 0.42);
}

.hero-mark img {
  width: 72%;
  height: 72%;
  border-radius: 28px;
  object-fit: cover;
}

.section,
.split {
  padding: 82px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.section-heading {
  max-width: 780px;
}

h2 {
  margin: 0;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1;
  letter-spacing: 0;
}

.section-heading p,
.split p,
.policy p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.65;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 34px;
}

.feature-grid article,
.policy {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.035));
}

.feature-grid article {
  min-height: 250px;
  padding: 22px;
}

.feature-grid span {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 950;
}

.feature-grid h3 {
  margin: 28px 0 10px;
  font-size: 21px;
}

.feature-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.7fr);
  gap: 44px;
}

.split ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.split li {
  padding: 13px 15px;
  border: 1px solid rgba(57, 216, 255, 0.22);
  border-radius: 12px;
  background: rgba(57, 216, 255, 0.06);
  color: #dceaff;
  font-weight: 850;
}

.policy {
  margin-top: 28px;
  padding: 26px;
}

footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 18px;
  padding: 32px 20px 44px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

@media (max-width: 880px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    flex-wrap: wrap;
  }

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

  .hero {
    min-height: auto;
  }

  .hero-mark {
    width: min(320px, 100%);
  }

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

@media (max-width: 560px) {
  main {
    width: min(100% - 28px, 1120px);
  }

  .hero h1 {
    font-size: 54px;
  }

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