:root {
  --bg: #f3f6fb;
  --surface: rgba(255, 255, 255, 0.88);
  --surface-strong: #ffffff;
  --text: #18212f;
  --muted: #5b6472;
  --primary: #2a63ff;
  --primary-soft: rgba(42, 99, 255, 0.12);
  --accent: #ff8b38;
  --border: rgba(24, 33, 47, 0.09);
  --shadow: 0 18px 50px rgba(17, 24, 39, 0.08);
  --radius: 24px;
  --radius-sm: 16px;
  --content-width: 860px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(42, 99, 255, 0.18), transparent 32%),
    radial-gradient(circle at top right, rgba(255, 139, 56, 0.16), transparent 28%),
    var(--bg);
  line-height: 1.7;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  padding: 10px 14px;
  background: var(--surface-strong);
  border-radius: 999px;
  box-shadow: var(--shadow);
  z-index: 100;
}

.skip-link:focus {
  top: 16px;
}

.shell {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  padding: 48px 0 24px;
}

.hero__inner {
  background: linear-gradient(135deg, rgba(24, 33, 47, 0.94), rgba(42, 99, 255, 0.92));
  color: #fff;
  border-radius: 32px;
  padding: 40px clamp(24px, 4vw, 52px);
  box-shadow: 0 26px 80px rgba(22, 34, 68, 0.25);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  color: #e7efff;
  font-size: 0.86rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 18px 0 12px;
  font-size: clamp(2.2rem, 4vw, 4rem);
  line-height: 1.08;
}

.hero__lead {
  margin: 0;
  max-width: 760px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.06rem;
}

.hero__meta {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.meta-card {
  padding: 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
}

.meta-card__label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.65);
}

.meta-card a {
  color: #fff;
}

.layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  padding: 24px 0 48px;
}

.toc {
  position: sticky;
  top: 20px;
}

.toc__card,
.card {
  background: var(--surface);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.toc__card {
  border-radius: var(--radius);
  padding: 22px;
}

.toc__card h2 {
  margin: 0 0 14px;
  font-size: 1rem;
}

.toc nav {
  display: grid;
  gap: 8px;
}

.toc nav a {
  padding: 10px 12px;
  border-radius: 12px;
  color: var(--muted);
  transition: background-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.toc nav a:hover,
.toc nav a:focus-visible {
  background: var(--primary-soft);
  color: var(--primary);
  text-decoration: none;
  transform: translateX(2px);
}

.content {
  display: grid;
  gap: 20px;
}

.card {
  border-radius: var(--radius);
  padding: clamp(22px, 3vw, 34px);
  width: min(100%, var(--content-width));
}

.intro-card {
  font-size: 1.02rem;
}

.section-heading {
  margin-bottom: 18px;
}

.section-heading span {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.section-heading h2 {
  margin: 12px 0 0;
  font-size: clamp(1.5rem, 2vw, 2rem);
  line-height: 1.2;
}

h3,
h4 {
  color: #0f1727;
}

h3 {
  margin-top: 28px;
  margin-bottom: 10px;
  font-size: 1.18rem;
}

h4 {
  margin-top: 22px;
  margin-bottom: 8px;
  font-size: 1rem;
}

p,
ul,
ol,
address {
  margin: 0 0 14px;
  color: var(--muted);
}

ul,
ol {
  padding-left: 1.2rem;
}

li + li {
  margin-top: 8px;
}

address {
  font-style: normal;
}

.stack-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 18px 0;
}

.info-panel {
  padding: 18px;
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, #ffffff, #f8fbff);
  border: 1px solid var(--border);
}

.info-panel h3:first-child {
  margin-top: 0;
}

.table-wrap {
  margin: 16px 0 8px;
  overflow-x: auto;
  border-radius: 18px;
  border: 1px solid var(--border);
}

.policy-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
  background: var(--surface-strong);
}

.policy-table caption {
  padding: 14px 16px;
  background: #f8fbff;
  color: var(--muted);
  text-align: left;
  font-size: 0.92rem;
  border-bottom: 1px solid rgba(24, 33, 47, 0.08);
}

.policy-table th,
.policy-table td {
  padding: 16px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid rgba(24, 33, 47, 0.08);
}

.policy-table th {
  background: #eef4ff;
  color: #10214c;
  font-size: 0.95rem;
}

.policy-table td {
  color: var(--muted);
}

.policy-table--dense th,
.policy-table--dense td {
  padding: 14px 12px;
  font-size: 0.95rem;
}

.previous-versions {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(250, 252, 255, 0.98));
}

.history-details {
  margin-top: 18px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: #fff;
  overflow: hidden;
}

.history-details summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: #f8fbff;
}

.history-details summary::-webkit-details-marker {
  display: none;
}

.history-article {
  padding: 24px 22px 8px;
  border-top: 1px solid var(--border);
}

.history-toc {
  padding: 16px 18px;
  margin: 16px 0 20px;
  border-radius: 16px;
  background: #f8faff;
  border: 1px solid var(--border);
}

.history-toc span {
  display: block;
  margin-bottom: 10px;
  font-weight: 700;
  color: var(--text);
}

.history-image {
  margin: 20px 0;
  padding: 14px;
  border-radius: 18px;
  background: #f8fbff;
  border: 1px solid var(--border);
}

.history-image figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.92rem;
}


.back-to-top {
  width: min(100%, var(--content-width));
  margin: 0;
  text-align: right;
}

.back-to-top a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 999px;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

@media (max-width: 1080px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }

  .toc__card,
  .card,
  .back-to-top {
    width: 100%;
  }
}

@media (max-width: 900px) {
  .hero__meta,
  .stack-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(100% - 20px, 1200px);
  }

  .hero {
    padding-top: 18px;
  }

  .hero__inner {
    border-radius: 24px;
    padding: 24px 18px;
  }

  .toc__card,
  .card {
    border-radius: 20px;
    padding: 20px 16px;
  }

  .history-details summary {
    align-items: flex-start;
    flex-direction: column;
  }

}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}