* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  color-scheme: dark;
  --bg: #05060d;
  --surface: #0f1224;
  --card: #141833;
  --text: #f7f7fb;
  --muted: #b6b7d4;
  --accent: #8b5cf6;
  --accent-2: #22d3ee;
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 24px 60px rgba(12, 10, 40, 0.45);
}

body {
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--accent-2);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  width: 0%;
  z-index: 20;
}

.hero {
  position: relative;
  padding: 24px 18px 40px;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top, rgba(139, 92, 246, 0.4), transparent 55%),
    radial-gradient(circle at bottom, rgba(34, 211, 238, 0.3), transparent 50%);
  opacity: 0.9;
  pointer-events: none;
}

.nav {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  z-index: 2;
}

.brand {
  font-weight: 600;
  font-size: 18px;
  letter-spacing: 0.4px;
}

.nav__links {
  display: none;
  gap: 12px;
  font-size: 13px;
  color: var(--muted);
}

.hero__content {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 16px;
  padding-top: 24px;
}

.hero__eyebrow {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.hero h1 {
  font-size: clamp(26px, 6vw, 40px);
  line-height: 1.15;
}

.hero__lead {
  font-size: 16px;
}

.hero__cta {
  display: grid;
  gap: 8px;
  margin-top: 8px;
}

.cta {
  padding: 14px 18px;
  border-radius: 999px;
  border: none;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #ffffff;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease;
  text-align: center;
}

.cta:active {
  transform: scale(0.98);
}

.cta__hint {
  font-size: 12px;
  color: var(--muted);
}

.content {
  display: grid;
  gap: 24px;
  padding: 0 18px 40px;
}

.section {
  display: grid;
  gap: 12px;
}

.section__title {
  font-size: 18px;
  font-weight: 600;
}

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 16px;
  border: 1px solid var(--border);
  box-shadow: 0 20px 45px rgba(6, 8, 20, 0.45);
  display: grid;
  gap: 12px;
}

.grid {
  display: grid;
  gap: 12px;
}

.list {
  padding-left: 18px;
  display: grid;
  gap: 8px;
  color: var(--muted);
}

.muted {
  color: var(--muted);
}

.footer {
  padding: 24px 18px 40px;
  display: grid;
  gap: 8px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer__meta {
  font-size: 12px;
}

.footer__link {
  font-size: 13px;
  color: var(--accent-2);
}

@media (min-width: 720px) {
  .hero {
    padding: 32px 48px 50px;
  }

  .content {
    padding: 0 48px 60px;
  }

  .nav__links {
    display: flex;
  }

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