:root {
  --paper: #f7f8fa;
  --ink: #101a2b;
  --muted: #536078;
  --rule: #ccd3df;
  --soft: #e9edf4;
  --blue: #1659d9;
  --blue-dark: #0c3f9d;
  --white: #ffffff;
  --measure: 72ch;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Leelawadee UI", Tahoma, Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

::selection { background: #bfd3ff; color: #071a43; }

a {
  color: var(--blue-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

a:hover { color: var(--blue); }

a:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 4px;
  border-radius: 2px;
}

.site-header,
footer {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-header {
  min-height: 88px;
  border-bottom: 1px solid var(--rule);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 750;
  text-decoration: none;
  letter-spacing: -0.015em;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  background: var(--blue);
  color: var(--white);
  font-size: 0.9rem;
  line-height: 1;
}

.site-header nav a { font-weight: 650; }

main {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

.hero {
  min-height: 680px;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.75fr);
  align-items: center;
  gap: clamp(48px, 8vw, 112px);
  padding: 84px 0 100px;
}

.status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status span {
  width: 10px;
  height: 10px;
  background: var(--blue);
  border-radius: 50%;
  box-shadow: 0 0 0 5px #dfe8ff;
}

h1, h2, h3, p { overflow-wrap: break-word; }

h1 {
  max-width: 12ch;
  margin: 0;
  font-size: clamp(3.1rem, 7.4vw, 6rem);
  line-height: 0.96;
  letter-spacing: -0.04em;
  font-weight: 800;
}

.lead {
  max-width: 61ch;
  margin: 30px 0 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.28rem);
  line-height: 1.65;
}

.primary-link {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-top: 38px;
  padding-bottom: 7px;
  border-bottom: 2px solid currentColor;
  font-weight: 750;
  text-decoration: none;
}

.primary-link span { transition: transform 180ms ease-out; }
.primary-link:hover span { transform: translateX(5px); }

.manifest {
  background: var(--ink);
  color: var(--white);
  box-shadow: 18px 22px 48px rgba(16, 26, 43, 0.18);
}

.manifest-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  border-bottom: 1px solid #475166;
  color: #bfc9db;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.manifest dl { margin: 0; padding: 16px 22px; }

.manifest dl div {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid #354056;
}

.manifest dt { color: #aeb9cb; }
.manifest dd { margin: 0; font-weight: 700; }
.manifest > p { margin: 0; padding: 20px 22px 24px; color: #c9d2e1; font-size: 0.9rem; }

.principles {
  padding: 92px 0 108px;
  border-top: 1px solid var(--rule);
}

.principles h2 {
  margin: 0 0 42px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
}

.principle-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--ink);
}

.principle-list article { padding: 28px 28px 0 0; }
.principle-list article + article { padding-left: 28px; border-left: 1px solid var(--rule); }
.principle-list h3 { margin: 0 0 9px; font-size: 1.16rem; }
.principle-list p { margin: 0; color: var(--muted); max-width: 34ch; }

.policy-shell {
  display: grid;
  grid-template-columns: 260px minmax(0, var(--measure));
  gap: clamp(48px, 8vw, 120px);
  align-items: start;
  padding: 72px 0 120px;
}

.policy-index {
  position: sticky;
  top: 32px;
  padding-top: 12px;
  border-top: 3px solid var(--blue);
}

.policy-index > p {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.11em;
}

.policy-index dl { margin: 0 0 28px; }
.policy-index dl div { padding: 8px 0; border-bottom: 1px solid var(--rule); }
.policy-index dt { color: var(--muted); font-size: 0.75rem; }
.policy-index dd { margin: 1px 0 0; font-size: 0.88rem; font-weight: 700; }
.policy-index nav { display: grid; gap: 7px; }
.policy-index nav a { color: var(--muted); font-size: 0.88rem; text-decoration: none; }
.policy-index nav a:hover { color: var(--blue); text-decoration: underline; }

.policy-title {
  padding-bottom: 52px;
  border-bottom: 1px solid var(--ink);
}

.policy-title > p:first-child {
  margin: 0 0 20px;
  color: var(--blue-dark);
  font-weight: 750;
}

.policy-title h1 {
  max-width: 14ch;
  font-size: clamp(2.8rem, 6vw, 5rem);
  line-height: 1;
}

.policy section {
  padding: 50px 0 4px;
  scroll-margin-top: 24px;
}

.policy section + section { border-top: 1px solid var(--rule); }

.policy h2 {
  margin: 0 0 22px;
  font-size: clamp(1.35rem, 3vw, 1.8rem);
  line-height: 1.25;
  letter-spacing: -0.025em;
}

.policy h2 span { color: var(--muted); font-size: 0.8em; font-weight: 600; }
.policy section p, .policy li { max-width: var(--measure); }
.policy section p { margin: 0 0 18px; }
.policy section p[lang="th"] { color: var(--muted); }
.policy ul { margin: 0 0 22px; padding-left: 1.3rem; }
.policy li { padding: 4px 0 4px 8px; }

.scope-list {
  padding: 16px 18px 16px 38px !important;
  background: var(--soft);
  border: 1px solid var(--rule);
}

.scope-list code {
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.84em;
  overflow-wrap: anywhere;
}

.notice {
  margin: 30px 0 42px;
  padding: 24px 28px;
  background: #e4ecff;
  border: 1px solid #afc5f7;
}

.notice strong { color: var(--blue-dark); }
.notice p { margin: 7px 0 0 !important; }

.policy-end {
  margin: 64px 0 0;
  padding: 18px 0;
  border-top: 3px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

footer {
  min-height: 110px;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.84rem;
}

@media (max-width: 820px) {
  .site-header, footer, main { width: min(100% - 32px, 680px); }
  .hero { min-height: auto; grid-template-columns: 1fr; gap: 54px; padding: 64px 0 80px; }
  h1 { font-size: clamp(3.2rem, 15vw, 5rem); }
  .manifest { max-width: 520px; }
  .principle-list { grid-template-columns: 1fr; }
  .principle-list article, .principle-list article + article { padding: 24px 0; border-left: 0; border-bottom: 1px solid var(--rule); }
  .policy-shell { grid-template-columns: 1fr; gap: 52px; padding-top: 52px; }
  .policy-index { position: static; }
  .policy-index nav { grid-template-columns: repeat(2, 1fr); gap: 10px 20px; }
}

@media (max-width: 520px) {
  .site-header { min-height: 76px; }
  .brand { gap: 9px; }
  .brand-mark { width: 30px; height: 30px; }
  .site-header nav a { font-size: 0.88rem; }
  .hero { padding-top: 52px; }
  h1 { font-size: clamp(2.8rem, 16vw, 4.2rem); }
  .lead { margin-top: 24px; }
  .manifest dl div { grid-template-columns: 1fr; gap: 2px; }
  .policy-index nav { grid-template-columns: 1fr; }
  .policy-title h1 { font-size: clamp(2.55rem, 13vw, 3.6rem); }
  .policy section { padding-top: 40px; }
  .notice { padding: 20px; }
  footer { align-items: flex-start; flex-direction: column; justify-content: center; gap: 4px; padding: 28px 0; }
}

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