@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;600&family=Noto+Sans+Thai:wght@300;400;500&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #fafaf8;
  --bg2: #f2f0eb;
  --text: #1a1a18;
  --text2: #555550;
  --text3: #999990;
  --border: #e0ddd6;
  --accent: #1a5c3a;
  --accent-light: #e8f2ec;
  --serif: 'Playfair Display', Georgia, serif;
  --sans: 'Noto Sans Thai', sans-serif;
}

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
}

/* ─── Layout ─── */
.site-wrap {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ─── Nav ─── */
nav {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

.nav-inner {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.nav-brand {
  font-family: var(--serif);
  font-size: 17px;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 0;
  list-style: none;
  flex-wrap: wrap;
}

.nav-links a {
  font-size: 13px;
  color: var(--text2);
  text-decoration: none;
  padding: 4px 14px;
  border-radius: 999px;
  transition: background 0.15s, color 0.15s;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--accent-light);
  color: var(--accent);
}

/* ─── Page header ─── */
.page-header {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
}

.page-tag {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--text3);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.page-title {
  font-family: var(--serif);
  font-size: 38px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-subtitle {
  font-size: 16px;
  color: var(--text2);
  margin-top: 0.5rem;
  font-weight: 300;
}

.page-affiliation {
  font-size: 14px;
  color: var(--text2);
  margin-top: 0.5rem;
  font-weight: 300;
  line-height: 1.4;
}

/* ─── Section ─── */
.section {
  margin-bottom: 2.5rem;
}

.section-label {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--text3);
  text-transform: uppercase;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

/* ─── Cards ─── */
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 12px;
}

.card-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 4px;
}

.card-meta {
  font-size: 12px;
  color: var(--text3);
  margin-bottom: 6px;
}

.card-body {
  font-size: 14px;
  color: var(--text2);
  line-height: 1.65;
}

/* ─── Pills ─── */
.pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text2);
  background: var(--bg2);
}

.pill.accent {
  background: var(--accent-light);
  color: var(--accent);
  border-color: #b8d8c4;
}

/* ─── Topic link cards ─── */
.topic-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin-bottom: 10px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s, background 0.15s;
}

.topic-link:hover {
  border-color: var(--accent);
  background: var(--accent-light);
}

.topic-link-title {
  font-size: 15px;
  font-weight: 500;
}

.topic-link-desc {
  font-size: 13px;
  color: var(--text2);
  margin-top: 2px;
}

.topic-arrow {
  font-size: 18px;
  color: var(--text3);
  flex-shrink: 0;
}

/* ─── Article prose ─── */
.prose h2 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  color: var(--text);
}

.prose p {
  margin-bottom: 1rem;
  color: var(--text2);
  font-size: 15px;
}

.prose ul {
  padding-left: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text2);
  font-size: 15px;
}

.prose li {
  margin-bottom: 0.4rem;
}

/* ─── Footer ─── */
footer {
  margin-top: 4rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 12px;
  color: var(--text3);
}

/* ─── Breadcrumb ─── */
.breadcrumb {
  font-size: 13px;
  color: var(--text3);
  margin-bottom: 1.5rem;
}

.breadcrumb a {
  color: var(--accent);
  text-decoration: none;
}

.breadcrumb a:hover { text-decoration: underline; }