:root {
  color-scheme: light dark;
  --bg: #f7f5f0;
  --card: #fff;
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --accent: #1b6b4a;
  --border: #e2ddd4;
  --link: #145a3a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121412;
    --card: #1c201c;
    --text: #eceae4;
    --muted: #a8a49a;
    --accent: #5ecf9a;
    --border: #2e342e;
    --link: #7ee0b0;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Sarabun", "Noto Sans Thai", system-ui, sans-serif;
  line-height: 1.65;
  background: var(--bg);
  color: var(--text);
}

.wrap {
  max-width: 42rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

header {
  margin-bottom: 2rem;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
  line-height: 1.25;
}

.lead {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.meta {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: var(--muted);
}

nav.top {
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

nav.top a {
  color: var(--link);
}

main {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem 1.25rem;
}

h2 {
  margin: 1.75rem 0 0.75rem;
  font-size: 1.15rem;
}

h2:first-child {
  margin-top: 0;
}

h3 {
  margin: 1.25rem 0 0.5rem;
  font-size: 1rem;
}

p {
  margin: 0.5rem 0;
}

ul {
  margin: 0.5rem 0;
  padding-left: 1.25rem;
}

li + li {
  margin-top: 0.35rem;
}

dl {
  margin: 0.5rem 0;
}

dt {
  font-weight: 600;
  margin-top: 0.75rem;
}

dd {
  margin: 0.25rem 0 0 0;
  color: var(--muted);
}

a {
  color: var(--link);
}

.contact-email {
  font-size: 1.1rem;
  font-weight: 600;
}

footer {
  margin-top: 2rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.app-info {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.95rem;
}

.app-info code {
  font-size: 0.9em;
}