:root {
  --green: #0e8c70;
  --green-light: #25d366;
  --ink: #1f2c34;
  --muted: #5b6b73;
  --bg: #f7f8fa;
  --card: #ffffff;
  --border: #e4e8eb;
  --radius: 16px;
  --maxw: 760px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ───────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--green-light), var(--green));
  color: #fff;
  padding: 48px 20px 40px;
  text-align: center;
}
.hero img {
  width: 84px;
  height: 84px;
  border-radius: 22px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
}
.hero h1 {
  margin: 18px 0 4px;
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.hero p {
  margin: 0;
  opacity: 0.92;
  font-size: 0.98rem;
}

/* ── Layout ───────────────────────────────────────────── */
main {
  max-width: var(--maxw);
  margin: -24px auto 0;
  padding: 0 16px 64px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 26px;
  box-shadow: 0 4px 24px rgba(15, 30, 40, 0.05);
}
.updated {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0 0 20px;
}
h2 {
  font-size: 1.15rem;
  margin: 28px 0 6px;
  color: var(--green);
  font-weight: 700;
}
h2:first-of-type { margin-top: 0; }
p, li { color: var(--ink); }
ul { padding-left: 20px; }
li { margin-bottom: 8px; }
a { color: var(--green); }
strong { color: var(--ink); }

.tag {
  display: inline-block;
  background: rgba(14, 140, 112, 0.1);
  color: var(--green);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

/* ── Footer ───────────────────────────────────────────── */
footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.82rem;
  padding: 8px 16px 40px;
}
footer a { margin: 0 8px; }

@media (max-width: 520px) {
  .hero h1 { font-size: 1.5rem; }
  .card { padding: 22px 18px; }
}