:root {
  color-scheme: light;
  --bg: #f5f7f6;
  --surface: #ffffff;
  --surface-soft: #edf1ef;
  --text: #17211d;
  --muted: #4f5e58;
  --line: #dce5e1;
  --brand: #00733f;
  --brand-dark: #005a32;
  --brand-soft: #e8f6ef;
  --yellow: #f5c84b;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

* {
  box-sizing: border-box;
}

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

a {
  color: var(--brand);
}
a:visited {
  color: #3d7a6a;
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

.site-header {
  align-items: center;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 20px;
  justify-content: space-between;
  padding: 16px clamp(16px, 4vw, 48px);
}

.brand {
  color: var(--brand-dark);
  font-weight: 850;
  text-decoration: none;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

nav a {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

.breadcrumbs {
  align-items: center;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  font-size: 0.9rem;
  gap: 8px;
  margin-bottom: 18px;
}

.breadcrumbs a {
  color: var(--brand);
  text-decoration: none;
}

main {
  margin: 0 auto;
  max-width: 980px;
  padding: clamp(18px, 4vw, 44px);
}

.seo-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: clamp(20px, 5vw, 44px);
}

.kicker {
  color: var(--brand);
  font-weight: 800;
  letter-spacing: 0.04em;
  margin: 0 0 8px;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.08;
  margin: 0 0 10px;
}

h2 {
  color: var(--brand-dark);
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.25;
  margin: 0 0 18px;
}

h3 {
  font-size: 1.15rem;
  margin-top: 28px;
}

.summary {
  color: var(--muted);
  max-width: 760px;
}

.question-th {
  font-size: 1.25rem;
  font-weight: 700;
}

.question-en {
  color: var(--muted);
}

.question-image {
  background: #f8faf9;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  display: block;
  margin: 24px 0;
  max-height: 320px;
  max-width: 100%;
  object-fit: contain;
  padding: 14px;
}

.answer-list {
  display: grid;
  gap: 10px;
  list-style: none;
  padding: 0;
}

.answer-list li {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  display: grid;
  gap: 8px;
  grid-template-columns: 34px minmax(0, 1fr);
  padding: 12px;
}

.answer-list strong {
  color: var(--brand);
}

.answer-list small {
  color: var(--muted);
  display: block;
  grid-column: 2;
}

.answer-box {
  background: var(--brand-soft);
  border: 1px solid #c8e5d6;
  border-radius: var(--radius-md);
  padding: 16px;
}

.answer-box p,
.answer-box strong {
  color: var(--text);
}

.related-list,
.index-list,
.check-list,
.category-grid,
.sign-grid {
  padding-left: 20px;
}

.index-list li,
.related-list li {
  margin: 10px 0;
}

.index-list small {
  color: var(--muted);
  display: block;
}

.category-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  list-style: none;
  padding: 0;
}

.category-grid a {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  color: var(--text);
  display: grid;
  gap: 4px;
  min-height: 116px;
  padding: 16px;
  text-decoration: none;
}

.category-grid a:hover {
  border-color: #b5d7c8;
  box-shadow: 0 8px 22px rgb(0 90 50 / 0.08);
}

.category-grid span,
.category-grid small {
  color: var(--muted);
}

.sign-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  list-style: none;
  padding: 0;
}

.sign-grid li {
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  display: grid;
  gap: 12px;
  grid-template-columns: 64px minmax(0, 1fr);
  min-height: 86px;
  padding: 12px;
}

.sign-grid img,
.thumb-placeholder {
  align-items: center;
  background: #f9fbfa;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  display: flex;
  height: 64px;
  justify-content: center;
  object-fit: contain;
  padding: 4px;
  width: 64px;
}

.cta {
  background: var(--brand);
  border-radius: var(--radius-md);
  color: #fff;
  display: inline-flex;
  font-weight: 800;
  margin-top: 28px;
  min-height: 48px;
  padding: 12px 18px;
  text-decoration: none;
}

.cta:visited {
  color: #fff;
}

.cta:hover {
  background: var(--brand-dark);
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }
}

/* ── Landing page ─────────────────────────────────── */
.hero-card {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);
  color: white;
  text-align: center;
  padding: 48px 24px;
  border-radius: 0;
  margin: 0;
}
.hero-card h1 { color: white; font-size: 28px; margin: 0 0 12px; }
.hero-card .summary { color: rgba(255,255,255,.85); font-size: 16px; margin: 0 0 24px; }
.cta-large {
  display: inline-block;
  background: #f2c94c;
  color: #17211d;
  font-weight: 700;
  font-size: 18px;
  padding: 14px 40px;
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: transform .15s, box-shadow .15s;
}
.cta-large:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,.2);
}
.category-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}
.category-index a {
  display: inline-block;
  padding: 8px 14px;
  background: var(--surface);
  border-radius: var(--radius-sm);
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  transition: background .15s;
}
.category-index a:hover { background: var(--line); }
.lang-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}
.lang-links a {
  display: inline-block;
  padding: 8px 14px;
  background: var(--surface);
  border-radius: var(--radius-sm);
  color: #17211d;
  text-decoration: none;
  font-size: 14px;
}
.lang-links a:hover { background: #d0d9d4; }
.site-footer {
  text-align: center;
  padding: 24px;
  color: #6b7a73;
  font-size: 13px;
}
.site-footer a { color: var(--brand); }

/* ── Article navigation (prev/up/next) ── */
.article-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.article-nav a {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--text);
  flex: 1;
  min-width: 140px;
  padding: 10px 14px;
  text-align: center;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.article-nav a:hover {
  background: var(--brand-soft);
  border-color: var(--brand);
  box-shadow: 0 2px 8px rgb(0 115 63 / 0.1);
}

.article-nav .article-up {
  background: var(--surface-soft);
  font-weight: 700;
}

@media (max-width: 640px) {
  .article-nav {
    flex-direction: column;
  }
  .article-nav a {
    min-width: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ── Tables (for article content) ── */
table {
  border-collapse: collapse;
  margin: 16px 0;
  width: 100%;
}

table th,
table td {
  border: 1px solid #dce5e1;
  padding: 10px 14px;
  text-align: left;
  vertical-align: top;
}

table th {
  background: #e8f6ef;
  color: #17211d;
  font-weight: 800;
  font-size: 0.85rem;
}

table td {
  font-size: 0.88rem;
}

table tr:nth-child(even) td {
  background: #edf1ef;
}

/* ── Callout boxes (for article tips/warnings) ── */
.callout {
  border-radius: 8px;
  margin: 16px 0;
  padding: 14px 16px;
}

.callout-warning {
  background: #fff8e6;
  border: 1px solid #f0d78c;
}

.callout-tip {
  background: #e8f6ef;
  border: 1px solid #b5d7c8;
}

.callout-info {
  background: #eef5ff;
  border: 1px solid #b9d5f8;
}