:root {
  --bg: #0b1220;
  --card: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #38bdf8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: linear-gradient(180deg, #020617, #0b1220);
  color: var(--text);
}

.container {
  max-width: 820px;
  margin: 80px auto;
  padding: 0 24px;
}

.hero {
  margin-bottom: 48px;
}

h1 {
  font-size: 3rem;
  margin-bottom: 0.3em;
}

.subtitle {
  font-size: 1.15rem;
  color: var(--muted);
}

h2 {
  margin-top: 48px;
  margin-bottom: 12px;
  font-size: 1.4rem;
}

p {
  line-height: 1.65;
  color: var(--text);
}

.tags {
  color: var(--accent);
  font-weight: 500;
}

.links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.btn {
  padding: 10px 18px;
  border-radius: 8px;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s ease;
}

.btn:hover {
  background: rgba(56, 189, 248, 0.22);
  transform: translateY(-1px);
}

footer {
  margin-top: 80px;
  font-size: 0.9rem;
  color: var(--muted);
  text-align: center;
}