:root {
  --bg: #ffffff;
  --text: #111111;
  --muted: #555555;
  --border: #e5e7eb;
  --surface: #f8f9fa;
  --accent: #9c16a3;
  --accent-hover: #721580;
  --link: #2563eb;
  --success: #22c55e;
  --warning: #f59e0b;
  --error: #ef4444;
  --radius: 10px;
  --container: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: Inter, "IBM Plex Sans Thai", "Noto Sans Thai", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  margin: 0;
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(156, 22, 163, 0.22);
  outline-offset: 2px;
}

.site-header {
  align-items: center;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 24px;
  justify-content: space-between;
  padding: 16px max(24px, calc((100vw - var(--container)) / 2));
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
}

.brand {
  align-items: center;
  color: var(--text);
  display: inline-flex;
  gap: 12px;
  min-width: 220px;
  text-decoration: none;
}

.brand-mark {
  align-items: center;
  background: var(--accent);
  border-radius: var(--radius);
  color: white;
  display: inline-flex;
  font-weight: 800;
  height: 40px;
  justify-content: center;
  width: 40px;
}

.brand small {
  color: var(--muted);
  display: block;
  font-size: 12px;
  line-height: 1.2;
}

.brand strong {
  display: block;
  font-size: 15px;
  line-height: 1.2;
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: flex-end;
}

.top-nav a {
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 14px;
  padding: 8px 10px;
  text-decoration: none;
  transition: background 120ms ease, color 120ms ease;
}

.top-nav a:hover {
  background: var(--surface);
  color: var(--text);
}

.home {
  margin: 0 auto;
  max-width: var(--container);
  padding: 48px 24px 96px;
}

.shell {
  display: grid;
  gap: 48px;
  grid-template-columns: 280px minmax(0, 1fr);
  margin: 0 auto;
  max-width: var(--container);
  padding: 40px 24px 96px;
}

.sidebar {
  align-self: start;
  border-right: 1px solid var(--border);
  padding-right: 24px;
  position: sticky;
  top: 88px;
}

.sidebar-title,
.page-kicker,
.doc-card span,
.info-card span,
.pricing-grid span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
}

.sidebar-title {
  margin: 0 0 12px;
}

.doc-link {
  border-radius: var(--radius);
  color: var(--text);
  display: block;
  margin-bottom: 4px;
  padding: 10px 12px;
  text-decoration: none;
  transition: background 120ms ease, color 120ms ease;
}

.doc-link span {
  color: var(--muted);
  display: block;
  font-size: 12px;
  line-height: 1.2;
}

.doc-link:hover,
.doc-link.active {
  background: var(--surface);
  color: var(--accent);
}

.content-page {
  max-width: 820px;
}

.content-page h1,
.hero-panel h1 {
  font-size: clamp(34px, 5vw, 56px);
  letter-spacing: 0;
  line-height: 1.08;
  margin: 0 0 16px;
}

.content-page h2,
.content-section h2,
.info-card h2 {
  font-size: clamp(24px, 3vw, 34px);
  letter-spacing: 0;
  line-height: 1.18;
  margin: 48px 0 12px;
}

.content-page h3 {
  font-size: 21px;
  line-height: 1.25;
  margin: 32px 0 8px;
}

.content-page h4 {
  font-size: 18px;
  margin: 24px 0 8px;
}

.page-subtitle,
.lead {
  color: var(--muted);
  font-size: 18px;
  margin-bottom: 40px;
}

.content-page p {
  margin: 0 0 16px;
}

.content-page ul,
.content-page ol {
  margin: 0 0 24px;
  padding-left: 24px;
}

.content-page li {
  margin: 7px 0;
}

.content-page a {
  color: var(--link);
}

.task {
  align-items: center;
  display: flex;
  gap: 10px;
  list-style: none;
  margin-left: -24px;
}

.task input {
  accent-color: var(--accent);
  height: 16px;
  width: 16px;
}

.table-wrap {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin: 24px 0;
  overflow-x: auto;
}

table {
  border-collapse: collapse;
  min-width: 640px;
  width: 100%;
}

th,
td {
  border-bottom: 1px solid var(--border);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--surface);
  font-weight: 700;
}

tr:last-child td {
  border-bottom: 0;
}

.hero-panel {
  align-items: center;
  border-bottom: 1px solid var(--border);
  display: grid;
  gap: 48px;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  padding: 40px 0 64px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  border-radius: var(--radius);
  display: inline-flex;
  font-weight: 700;
  padding: 11px 16px;
  text-decoration: none;
  transition: background 120ms ease, border-color 120ms ease, color 120ms ease;
}

.button.primary {
  background: var(--accent);
  color: white;
}

.button.primary:hover {
  background: var(--accent-hover);
}

.button.secondary {
  border: 1px solid var(--border);
  color: var(--text);
}

.button.secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.metrics {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, 1fr);
}

.metrics div,
.info-card,
.pricing-grid article,
.doc-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.metrics strong {
  display: block;
  font-size: 32px;
  line-height: 1.1;
}

.metrics span {
  color: var(--muted);
}

.section-grid,
.pricing-grid,
.doc-grid {
  display: grid;
  gap: 16px;
}

.section-grid {
  grid-template-columns: repeat(3, 1fr);
  padding: 48px 0;
}

.info-card h2 {
  font-size: 24px;
  margin-top: 8px;
}

.info-card p,
.pricing-grid p,
.doc-card small {
  color: var(--muted);
}

.content-section {
  border-top: 1px solid var(--border);
  padding: 56px 0;
}

.timeline {
  display: grid;
  gap: 12px;
}

.timeline div {
  align-items: start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: grid;
  gap: 16px;
  grid-template-columns: 120px 170px 1fr;
  padding: 16px;
}

.timeline time {
  color: var(--accent);
  font-weight: 700;
}

.timeline strong {
  line-height: 1.3;
}

.timeline span {
  color: var(--muted);
}

.pricing-grid {
  grid-template-columns: repeat(3, 1fr);
}

.pricing-grid strong {
  display: block;
  font-size: 28px;
  line-height: 1.2;
  margin: 8px 0;
}

.doc-grid {
  grid-template-columns: repeat(3, 1fr);
}

.doc-card {
  color: var(--text);
  text-decoration: none;
  transition: border-color 120ms ease, transform 120ms ease;
}

.doc-card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.doc-card strong,
.doc-card small {
  display: block;
}

.doc-card strong {
  margin: 6px 0;
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .top-nav {
    justify-content: flex-start;
  }

  .shell,
  .hero-panel,
  .section-grid,
  .pricing-grid,
  .doc-grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px;
    position: static;
  }

  .timeline div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

@media (max-width: 560px) {
  .home,
  .shell {
    padding: 32px 16px 64px;
  }

  .site-header {
    padding: 14px 16px;
  }

  .metrics {
    grid-template-columns: 1fr;
  }
}