:root {
  color-scheme: light;
  --ink: #111827;
  --muted: #53647d;
  --line: #d8e2f0;
  --paper: #ffffff;
  --canvas: #f3f7fd;
  --brand: #2463eb;
  --brand-dark: #1748ad;
  --soft-blue: #eaf2ff;
  --warning-bg: #fff7e6;
  --warning-line: #e4aa35;
  --danger-bg: #fff0f1;
  --danger-line: #d23b4f;
  --success-bg: #eafaf2;
  --success-line: #16885a;
  --radius: 18px;
  --shadow: 0 14px 40px rgba(31, 68, 128, 0.09);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 8% 12%, rgba(53, 132, 255, 0.12), transparent 24rem),
    radial-gradient(circle at 94% 85%, rgba(22, 182, 164, 0.08), transparent 23rem),
    var(--canvas);
  color: var(--ink);
  font-family: "Segoe UI", Tahoma, Arial, sans-serif;
  line-height: 1.85;
}

a {
  color: var(--brand-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover,
a:focus-visible {
  color: var(--brand);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(36, 99, 235, 0.32);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  inset-inline-start: 1rem;
  top: -5rem;
  z-index: 20;
  padding: 0.7rem 1rem;
  border-radius: 10px;
  background: var(--ink);
  color: #fff;
}

.skip-link:focus {
  top: 1rem;
  color: #fff;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(216, 226, 240, 0.9);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.header-inner,
.page-shell,
.footer-inner {
  width: min(1120px, calc(100% - 2rem));
  margin-inline: auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  font-size: 1.12rem;
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--brand), #00a4c8);
  color: #fff;
  font-size: 1.15rem;
  box-shadow: 0 8px 20px rgba(36, 99, 235, 0.2);
}

.header-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: flex-end;
}

.header-actions a {
  padding: 0.45rem 0.75rem;
  border-radius: 10px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 650;
  text-decoration: none;
}

.header-actions a:hover,
.header-actions a[aria-current="page"] {
  background: var(--soft-blue);
  color: var(--brand-dark);
}

.page-shell {
  padding-block: clamp(2rem, 5vw, 4.5rem);
}

.hero {
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid var(--line);
  border-radius: 26px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.98), rgba(235, 243, 255, 0.96));
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 0.25rem;
  color: var(--brand-dark);
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0.03em;
}

h1,
h2,
h3 {
  line-height: 1.35;
}

h1 {
  margin: 0.3rem 0 0.75rem;
  font-size: clamp(2rem, 5vw, 3.25rem);
}

h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.35rem, 3vw, 1.75rem);
}

h3 {
  margin: 0 0 0.4rem;
  font-size: 1.08rem;
}

p,
ul,
ol {
  margin-block: 0.65rem;
}

ul,
ol {
  padding-inline-start: 1.3rem;
}

.lead {
  max-width: 78ch;
  color: #34445d;
  font-size: 1.08rem;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.2rem;
  margin-top: 1.2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.notice {
  margin-top: 1.25rem;
  padding: 1rem 1.1rem;
  border-inline-start: 4px solid var(--warning-line);
  border-radius: 12px;
  background: var(--warning-bg);
}

.notice.danger {
  border-color: var(--danger-line);
  background: var(--danger-bg);
}

.notice.success {
  border-color: var(--success-line);
  background: var(--success-bg);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card,
.section {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow);
}

.card {
  padding: 1.25rem;
  border-radius: var(--radius);
}

.card p {
  color: var(--muted);
}

.card-link {
  display: inline-flex;
  margin-top: 0.25rem;
  font-weight: 750;
}

.section {
  margin-top: 1.25rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  border-radius: 22px;
}

.section > :last-child,
.card > :last-child,
.notice > :last-child {
  margin-bottom: 0;
}

.section > :first-child,
.card > :first-child,
.notice > :first-child {
  margin-top: 0;
}

.definition-list {
  display: grid;
  grid-template-columns: minmax(130px, 0.35fr) minmax(0, 1fr);
  gap: 0.75rem 1rem;
  margin: 0;
}

.definition-list dt {
  font-weight: 800;
}

.definition-list dd {
  margin: 0;
  color: var(--muted);
}

.link-list {
  display: grid;
  gap: 0.75rem;
  padding: 0;
  list-style: none;
}

.link-list li {
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f8fbff;
}

.link-list a {
  font-weight: 750;
  overflow-wrap: anywhere;
}

.restricted-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  list-style: none;
}

.restricted-list li {
  padding: 0.3rem 0.65rem;
  border: 1px solid #f0c8ce;
  border-radius: 999px;
  background: #fff7f8;
  color: #7b2837;
  font-size: 0.9rem;
}

.english-summary {
  direction: ltr;
  text-align: left;
  font-family: "Segoe UI", Arial, sans-serif;
}

.english-summary p,
.english-summary li {
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer-inner {
  display: grid;
  gap: 0.8rem;
  padding-block: 1.75rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1rem;
}

.footer-nav a {
  color: #42536c;
}

.ltr {
  direction: ltr;
  unicode-bidi: isolate;
}

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

@media (max-width: 820px) {
  .site-header {
    position: static;
  }

  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding-block: 0.85rem;
  }

  .header-actions {
    justify-content: flex-start;
  }

  .grid,
  .grid.three {
    grid-template-columns: 1fr;
  }

  .definition-list {
    grid-template-columns: 1fr;
  }

  .definition-list dd {
    padding-bottom: 0.65rem;
    border-bottom: 1px solid var(--line);
  }
}

@media print {
  body {
    background: #fff;
  }

  .site-header,
  .site-footer,
  .skip-link {
    display: none;
  }

  .page-shell {
    width: 100%;
    padding: 0;
  }

  .hero,
  .section,
  .card {
    break-inside: avoid;
    box-shadow: none;
  }
}