:root {
  color-scheme: dark;
  --bg: #080808;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.62);
  --soft: rgba(255, 255, 255, 0.38);
  --accent: #6ea8ff;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top, rgba(65, 105, 225, 0.16), transparent 36%),
    linear-gradient(180deg, #0f1630 0%, var(--bg) 24%, var(--bg) 100%);
  color: var(--text);
  font-family: "Plus Jakarta Sans", system-ui, sans-serif;
}

body {
  padding: 32px 18px 72px;
}

.shell {
  max-width: 860px;
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.wordmark {
  color: var(--text);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  text-decoration: none;
}

.back-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.back-link:hover {
  color: var(--text);
}

.hero {
  padding: 26px 24px;
  border-radius: 24px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(14px);
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.02;
}

.intro,
.updated {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.updated {
  margin-top: 10px;
  color: var(--soft);
  font-size: 0.95rem;
}

.content {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.section {
  padding: 22px 22px 20px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.section h2 {
  margin: 0 0 10px;
  font-size: 1.1rem;
}

.section p,
.section li {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.section ul {
  margin: 12px 0 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
}

a {
  color: #9dc0ff;
}

@media (max-width: 640px) {
  body {
    padding-top: 22px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .section {
    padding-left: 18px;
    padding-right: 18px;
  }
}