:root {
  color-scheme: dark;
  --background: #090b1f;
  --surface: rgba(26, 29, 65, 0.82);
  --text: #f8f8ff;
  --muted: #b9bce0;
  --violet: #9b74ff;
  --cyan: #57d8ff;
  --coral: #ff718a;
  --line: rgba(255, 255, 255, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  line-height: 1.55;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 5%, rgba(155, 116, 255, 0.3), transparent 31rem),
    radial-gradient(circle at 88% 20%, rgba(87, 216, 255, 0.2), transparent 28rem),
    var(--background);
}

a {
  color: var(--cyan);
}

.shell {
  width: min(900px, calc(100% - 36px));
  margin: 0 auto;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 0;
}

.brand {
  color: var(--text);
  font-weight: 850;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.95rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.hero {
  display: grid;
  gap: 28px;
  padding: 90px 0 72px;
}

.eyebrow {
  margin: 0;
  color: var(--cyan);
  font-size: 0.82rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(3rem, 10vw, 6.5rem);
  line-height: 0.92;
  letter-spacing: -0.065em;
}

h1 span {
  background: linear-gradient(100deg, var(--violet), var(--cyan), var(--coral));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  max-width: 650px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.1rem, 3vw, 1.35rem);
}

.stack {
  display: grid;
  gap: 10px;
  width: min(360px, 82vw);
  margin: 10px auto 0;
  transform: rotate(-2deg);
}

.block {
  height: 44px;
  border-radius: 13px;
  background: linear-gradient(90deg, var(--violet), var(--cyan), var(--coral));
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.28);
}

.block:nth-child(2) { width: 88%; margin-left: 9%; }
.block:nth-child(3) { width: 72%; margin-left: 15%; }
.block:nth-child(4) { width: 54%; margin-left: 27%; }

.card {
  margin: 32px 0;
  padding: clamp(24px, 6vw, 44px);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  backdrop-filter: blur(16px);
}

.card h1 {
  margin-bottom: 24px;
  font-size: clamp(2.2rem, 7vw, 4.3rem);
}

.card h2 {
  margin-top: 34px;
}

.card p,
.card li {
  color: var(--muted);
}

.card strong {
  color: var(--text);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 19px;
  border: 1px solid var(--line);
  border-radius: 14px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.07);
  font-weight: 700;
  text-decoration: none;
}

.button.primary {
  border: 0;
  color: #090b1f;
  background: linear-gradient(100deg, var(--cyan), #a6ebff);
}

footer {
  padding: 42px 0;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

@media (max-width: 560px) {
  nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    padding-top: 54px;
  }
}