:root {
  --bg: #07090c;
  --surface: #10151b;
  --surface-2: #161d26;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(45, 212, 191, 0.45);
  --text: #eef3f7;
  --text-muted: #93a1ae;
  --primary: #2dd4bf;
  --primary-2: #0ea5e9;
  --gradient-primary: linear-gradient(135deg, #0ea5e9 0%, #2dd4bf 60%, #a3e635 100%);
  /* Buttons carry near-black text, so their gradient stays in the bright end of the
     ramp — the #0ea5e9 stop above is too dark to read against. */
  --gradient-btn: linear-gradient(135deg, #5eead4 0%, #2dd4bf 45%, #bef264 100%);
  --shadow-glow: 0 0 38px -10px rgba(45, 212, 191, 0.55);
  --radius: 14px;
  --max-w: 820px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
[id] { scroll-margin-top: 84px; }
body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 22px; }
.muted { color: var(--text-muted); }
.small { font-size: .875rem; }
.grad-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: rgba(7, 9, 12, 0.78);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1080px; margin: 0 auto; padding: 0 22px;
  display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px;
}
.brand { font-weight: 800; font-size: 1.2rem; letter-spacing: -.02em; color: var(--text); }
.brand:hover { text-decoration: none; }
.nav-links { display: flex; align-items: center; gap: 20px; }
/* :not(.btn) — otherwise this outranks .btn-primary and repaints the button's text muted grey. */
.nav-links a:not(.btn) { color: var(--text-muted); font-size: .95rem; }
.nav-links a:not(.btn):hover { color: var(--text); text-decoration: none; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: 10px; font-weight: 650; font-size: .95rem;
  transition: transform .15s ease, box-shadow .2s ease;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--gradient-btn); color: #04191c; box-shadow: var(--shadow-glow); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 0 55px -8px rgba(45, 212, 191, .75); }
.btn-sm { padding: 9px 16px; font-size: .875rem; }
.btn-lg { padding: 15px 28px; font-size: 1rem; }

/* Home */
.hero { padding: 72px 0 40px; }
.hero h1 { font-size: clamp(2rem, 6vw, 3rem); line-height: 1.12; letter-spacing: -.03em; }
.lede { color: var(--text-muted); font-size: 1.08rem; margin: 18px 0 26px; }

.cards { display: grid; gap: 16px; padding-bottom: 72px; }
.card {
  display: block; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; color: var(--text);
  transition: border-color .2s ease, background .2s ease, transform .15s ease;
}
.card:hover {
  border-color: var(--border-strong); background: var(--surface-2);
  transform: translateY(-2px); text-decoration: none;
}
.card h2 { font-size: 1.25rem; letter-spacing: -.02em; margin: 6px 0 10px; }
.card-more { display: inline-block; margin-top: 14px; color: var(--primary); font-weight: 600; font-size: .9rem; }

/* Article */
.post { padding: 56px 22px 72px; }
.post-head { padding-bottom: 26px; border-bottom: 1px solid var(--border); margin-bottom: 32px; }
.post-head h1 { font-size: clamp(1.8rem, 5vw, 2.6rem); line-height: 1.15; letter-spacing: -.03em; margin: 10px 0; }

.prose > * + * { margin-top: 18px; }
.prose h2 { font-size: 1.45rem; letter-spacing: -.02em; margin-top: 42px; }
.prose h3 { font-size: 1.15rem; margin-top: 30px; }
.prose ul, .prose ol { padding-left: 24px; }
.prose li + li { margin-top: 8px; }
.prose strong { color: #fff; }
.prose code {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 6px;
  padding: 2px 6px; font-size: .9em;
}
.prose blockquote {
  border-left: 3px solid var(--primary); padding: 4px 0 4px 18px; color: var(--text-muted);
}
.prose table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.prose th, .prose td { border: 1px solid var(--border); padding: 10px 12px; text-align: left; vertical-align: top; }
.prose th { background: var(--surface-2); }

/* Recommendation block */
.cta {
  margin-top: 52px; background: var(--surface);
  border: 1px solid var(--border-strong); border-radius: var(--radius); padding: 28px;
}
.cta-kicker { text-transform: uppercase; letter-spacing: .1em; font-size: .74rem; color: var(--primary); font-weight: 700; }
.cta-title { font-size: 1.6rem; letter-spacing: -.02em; margin: 6px 0 12px; }
.cta p { color: var(--text-muted); }
.cta-points { list-style: none; margin: 18px 0 24px; }
.cta-points li { position: relative; padding-left: 26px; color: var(--text-muted); }
.cta-points li + li { margin-top: 8px; }
.cta-points li::before { content: "✓"; position: absolute; left: 0; color: var(--primary); font-weight: 700; }
.cta code { background: var(--surface-2); border-radius: 6px; padding: 2px 6px; font-size: .9em; }

.related { margin-top: 48px; padding-top: 26px; border-top: 1px solid var(--border); }
.related h2 { font-size: 1.1rem; margin-bottom: 12px; }
.related ul { list-style: none; }
.related li + li { margin-top: 10px; }

/* Footer */
.footer { border-top: 1px solid var(--border); background: var(--surface); }
.footer-inner { padding: 40px 22px; display: grid; gap: 10px; }
.footer-brand { font-weight: 800; font-size: 1.05rem; }