:root {
  --brand: #06C755;
  --brand-dark: #05a648;
  --text: #1a1a1a;
  --text-muted: #5b5b5b;
  --bg: #ffffff;
  --bg-soft: #f5f8f6;
  --border: #e6e9e7;
  --max-width: 860px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Noto Sans Thai", "Segoe UI", -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

header.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
  color: var(--text);
  text-decoration: none;
}

.brand .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--brand);
  display: inline-block;
}

nav.site-nav a {
  color: var(--text-muted);
  text-decoration: none;
  margin-left: 24px;
  font-size: 15px;
}

nav.site-nav a:hover { color: var(--brand-dark); }

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.hero {
  text-align: center;
  padding: 64px 24px 48px;
  background: linear-gradient(180deg, var(--bg-soft), #fff);
}

.hero h1 {
  font-size: 34px;
  margin-bottom: 12px;
}

.hero p {
  color: var(--text-muted);
  font-size: 17px;
  max-width: 520px;
  margin: 0 auto 28px;
}

.btn {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  padding: 12px 28px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  margin: 6px;
}

.btn.secondary {
  background: transparent;
  color: var(--brand-dark);
  border: 1.5px solid var(--brand);
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  padding: 48px 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.feature {
  background: var(--bg-soft);
  border-radius: 12px;
  padding: 24px;
}

.feature h3 { margin: 0 0 8px; font-size: 17px; }
.feature p { margin: 0; color: var(--text-muted); font-size: 14px; }

h1 { font-size: 28px; }
h2 { font-size: 20px; margin-top: 36px; border-bottom: 1px solid var(--border); padding-bottom: 8px; }
h3 { font-size: 16px; margin-top: 24px; }

.updated {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 32px;
}

ul { padding-left: 22px; }
li { margin-bottom: 6px; }

footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

footer.site-footer a { color: var(--text-muted); }

@media (max-width: 600px) {
  nav.site-nav a { margin-left: 14px; font-size: 13px; }
  .hero h1 { font-size: 26px; }
}