:root {
  --bg: #050b13;
  --panel: #0b1a31;
  --line: rgba(255, 255, 255, 0.13);
  --text: #ffffff;
  --muted: #b9c8d8;
  --blue: #117bff;
  --cyan: #26bdff;
  --green: #38e39c;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 14% 0%, rgba(17, 123, 255, 0.24), transparent 32%),
    radial-gradient(circle at 92% 18%, rgba(56, 227, 156, 0.1), transparent 25%),
    linear-gradient(160deg, #050b13, #071421 56%, #040914);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.65;
}

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

.container {
  width: min(92%, 1160px);
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(4, 10, 18, 0.85);
  backdrop-filter: blur(18px);
}

.navbar {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

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

.brand img {
  width: 50px;
  height: 50px;
  object-fit: contain;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 22px;
  letter-spacing: 0.06em;
}

.brand small {
  color: #a7bad0;
  font-size: 10px;
  font-weight: 850;
}

.header-links {
  display: flex;
  gap: 9px;
  flex-wrap: wrap;
}

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 17px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.05);
  font-size: 14px;
  font-weight: 900;
}

.button-primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--blue), #075cc5);
  box-shadow: 0 16px 36px rgba(17, 123, 255, 0.25);
}

.hero {
  padding: 78px 0 46px;
  text-align: center;
}

.eyebrow {
  color: var(--green);
  font-size: 13px;
  font-weight: 950;
  letter-spacing: 0.08em;
}

h1 {
  max-width: 890px;
  margin: 13px auto 18px;
  font-size: clamp(42px, 8vw, 78px);
  line-height: 1;
}

.hero-copy {
  max-width: 760px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 11px;
  margin-top: 28px;
}

.demo-note {
  max-width: 820px;
  margin: 24px auto 0;
  padding: 12px 15px;
  border: 1px solid rgba(56, 227, 156, 0.26);
  border-radius: 13px;
  background: rgba(56, 227, 156, 0.07);
  color: #d7f5e8;
  font-size: 13px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  padding: 18px 0 54px;
}

.feature-card {
  min-height: 210px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(16, 35, 63, 0.86), rgba(8, 20, 36, 0.88));
  box-shadow: 0 22px 54px rgba(0, 0, 0, 0.24);
}

.feature-number {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(38, 189, 255, 0.3);
  border-radius: 12px;
  background: rgba(38, 189, 255, 0.08);
  color: var(--cyan);
  font-weight: 950;
}

.feature-card h2 {
  margin: 17px 0 8px;
  font-size: 21px;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.privacy {
  margin-bottom: 70px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.035);
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}

@media (max-width: 820px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .navbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .header-links,
  .header-links .button {
    width: 100%;
  }

  .hero {
    padding-top: 54px;
  }

  .hero-actions,
  .hero-actions .button {
    width: 100%;
  }
}