:root { --bg: #0b1020; --card: #121a33; --text: #e5e7eb; --muted: #9ca3af; --accent: #6366f1; --accent2: #10b981; --line: #1f2a4a; }
@media (prefers-color-scheme: light) { :root { --bg: #f5f7fb; --card: #ffffff; --text: #111827; --muted: #6b7280; --line: #e5e7eb; } }
* { box-sizing: border-box; }
body { margin: 0; font-family: "Noto Sans Thai", "Sarabun", system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); line-height: 1.75; }
a { color: var(--accent); }
header { border-bottom: 1px solid var(--line); }
.wrap { max-width: 860px; margin: 0 auto; padding: 0 16px; }
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-weight: 900; font-size: 20px; text-decoration: none; background: linear-gradient(90deg, var(--accent), var(--accent2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav nav a { margin-left: 18px; color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 600; }
.nav nav a:hover { color: var(--text); }
main { padding: 40px 0 64px; }
h1 { font-size: 30px; line-height: 1.3; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 36px 0 8px; }
.muted { color: var(--muted); font-size: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 20px 22px; margin: 16px 0; }
.hero { text-align: center; padding: 56px 0 24px; }
.hero h1 { font-size: 40px; }
.btn { display: inline-block; margin-top: 24px; padding: 14px 28px; border-radius: 12px; color: #fff; text-decoration: none; font-weight: 800; background: linear-gradient(90deg, #2563eb, var(--accent)); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-top: 32px; }
.grid .card h3 { margin: 0 0 6px; font-size: 16px; }
.grid .card p { margin: 0; color: var(--muted); font-size: 14px; }
ul { padding-left: 22px; }
footer { border-top: 1px solid var(--line); padding: 24px 0; color: var(--muted); font-size: 13px; }
footer a { color: var(--muted); margin-right: 14px; }