:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --surface: #ffffff;
  --text: #15202b;
  --muted: #52616f;
  --accent: #156b45;
  --accent-strong: #0d4e33;
  --border: #d9e2ec;
  --highlight: #e9f6ef;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.65;
}

.site-header,
main,
footer {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  padding: 32px 0 16px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0 0 12px;
  line-height: 1.3;
}

h1 {
  font-size: 34px;
  color: var(--accent-strong);
}

h2 {
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  color: var(--accent-strong);
  font-size: 24px;
}

h3 {
  margin-top: 22px;
  font-size: 18px;
}

p,
li {
  font-size: 16px;
}

a {
  color: var(--accent-strong);
  font-weight: 700;
}

ul {
  padding-left: 22px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
}

nav a[aria-current="page"] {
  border-color: var(--accent);
  background: var(--highlight);
  color: var(--accent-strong);
}

.meta {
  margin: 0;
  color: var(--muted);
}

.panel {
  margin: 18px 0;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.notice {
  background: var(--highlight);
}

.thai {
  font-family: Arial, "Tahoma", sans-serif;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  text-decoration: none;
}

footer {
  padding: 12px 0 36px;
  color: var(--muted);
}

@media (max-width: 640px) {
  h1 {
    font-size: 28px;
  }

  .panel {
    padding: 18px;
  }
}