:root {
  --bg: #091522;
  --paper: rgba(19, 38, 58, 0.86);
  --paper-strong: #f4f7fb;
  --ink: #122130;
  --muted: #617487;
  --line: rgba(137, 164, 190, 0.22);
  --teal: #56d2e2;
  --amber: #ff8b3d;
  --text-on-dark: #e8f0f7;
  --muted-on-dark: #9fb4c8;
  --shadow: 0 28px 80px rgba(3, 11, 20, 0.42);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body.doc-body {
  margin: 0;
  color: var(--text-on-dark);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(255, 139, 61, 0.18), transparent 22%),
    radial-gradient(circle at 88% 12%, rgba(86, 210, 226, 0.16), transparent 20%),
    linear-gradient(180deg, #07111c 0%, var(--bg) 100%);
}

a {
  color: inherit;
}

.site-shell {
  width: min(1220px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 64px;
}

.site-header,
.site-nav,
.doc-layout {
  display: flex;
  gap: 16px;
}

.site-header,
.site-nav,
.card {
  border: 1px solid var(--line);
  background: var(--paper);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

.site-header,
.site-nav,
.card,
.library-link,
.nav-link,
.button {
  border-radius: 24px;
}

.site-header {
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: linear-gradient(135deg, #0d1c2d, #1c4460);
  color: var(--text-on-dark);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-copy {
  display: grid;
  gap: 2px;
}

.brand-copy strong {
  font-size: 18px;
}

.brand-copy span {
  color: var(--muted-on-dark);
  font-size: 14px;
}

.home-link,
.nav-link,
.button,
.library-link {
  text-decoration: none;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.home-link {
  padding: 12px 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-on-dark);
}

.site-nav {
  margin-top: 14px;
  padding: 10px;
  flex-wrap: wrap;
}

.nav-link {
  padding: 12px 14px;
  color: var(--muted-on-dark);
  border: 1px solid transparent;
}

.nav-link.is-active,
.nav-link:hover,
.home-link:hover,
.button:hover,
.library-link:hover {
  transform: translateY(-1px);
}

.nav-link.is-active {
  color: #06111b;
  background: var(--teal);
}

.doc-main {
  margin-top: 22px;
}

.card {
  padding: 28px;
}

.doc-hero {
  display: grid;
  grid-template-columns: 1.35fr 0.9fr;
  gap: 24px;
  align-items: end;
}

.eyebrow,
.meta-label,
.library-type {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow,
.library-type {
  color: var(--amber);
}

.doc-hero h1,
.doc-sidebar h2,
.prose h2,
.prose h3 {
  letter-spacing: -0.03em;
}

.doc-hero h1 {
  margin: 0 0 14px;
  font-size: clamp(34px, 6vw, 60px);
  line-height: 0.95;
  max-width: 12ch;
}

.lead,
.doc-sidebar p,
.prose p,
.prose li {
  line-height: 1.7;
}

.lead,
.doc-sidebar p,
.library-link span:last-child {
  color: var(--muted-on-dark);
}

.lead {
  margin: 0;
  max-width: 62ch;
  font-size: 18px;
}

.hero-meta {
  display: grid;
  gap: 18px;
}

.meta-label {
  color: var(--teal);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.trust-note {
  display: inline-flex;
  margin-top: 18px;
  padding: 10px 14px;
  border: 1px solid rgba(86, 210, 226, 0.28);
  border-radius: 999px;
  background: rgba(86, 210, 226, 0.1);
  color: var(--teal);
  font-weight: 600;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border: 1px solid transparent;
  font-weight: 600;
}

.button.primary {
  background: var(--amber);
  color: #08131d;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--line);
  color: var(--text-on-dark);
}

.doc-layout {
  align-items: start;
  margin-top: 22px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.summary-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(19, 38, 58, 0.7);
  box-shadow: var(--shadow);
}

.summary-card h2 {
  margin: 0 0 8px;
  font-size: 20px;
  color: var(--text-on-dark);
}

.summary-card p {
  margin: 0;
  color: var(--muted-on-dark);
  line-height: 1.6;
}

.doc-content {
  flex: 1 1 0;
  min-width: 0;
  background: var(--paper-strong);
  color: var(--ink);
}

.doc-sidebar {
  width: min(360px, 100%);
  display: grid;
  gap: 16px;
}

.sidebar-panel,
.library-grid,
.related-panel {
  display: grid;
  gap: 14px;
}

.related-links {
  display: grid;
  gap: 10px;
}

.related-link {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.06);
}

.library-link {
  display: grid;
  gap: 8px;
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.06);
}

.library-link strong {
  font-size: 18px;
}

.library-link.is-active {
  border-color: rgba(86, 210, 226, 0.5);
  background: rgba(86, 210, 226, 0.12);
}

.doc-content .eyebrow,
.doc-content .library-type,
.doc-content .meta-label,
.prose h2,
.prose h3 {
  color: #103454;
}

.acknowledgement-panel {
  margin-top: 36px;
  padding: 24px;
  border: 1px solid rgba(16, 52, 84, 0.12);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(16, 52, 84, 0.04), rgba(86, 210, 226, 0.06));
}

.acknowledgement-panel h2 {
  margin: 0 0 12px;
  font-size: 28px;
}

.acknowledgement-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.acknowledgement-item {
  position: relative;
  margin: 0;
  padding: 0 0 0 34px;
  color: var(--muted);
}

.acknowledgement-item + .acknowledgement-item {
  margin-top: 14px;
}

.acknowledgement-item::before {
  content: "";
  position: absolute;
  top: 3px;
  left: 0;
  width: 18px;
  height: 18px;
  border-radius: 6px;
  border: 2px solid #1a5577;
  background: rgba(86, 210, 226, 0.12);
}

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

.prose > :first-child {
  margin-top: 0;
}

.prose h2 {
  margin: 34px 0 10px;
  font-size: 30px;
}

.prose h3 {
  margin: 24px 0 8px;
  font-size: 22px;
}

.prose p,
.prose ul,
.prose ol,
.prose pre {
  margin: 0 0 16px;
}

.prose ul,
.prose ol {
  padding-left: 22px;
}

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

.prose code {
  padding: 2px 6px;
  border-radius: 8px;
  background: rgba(24, 34, 41, 0.08);
  font-family: "IBM Plex Mono", "SFMono-Regular", monospace;
  font-size: 0.95em;
}

.prose pre {
  padding: 16px;
  overflow-x: auto;
  border-radius: 18px;
  background: #1f2c33;
}

.prose pre code {
  padding: 0;
  background: transparent;
  color: #f5efe4;
}

.flow-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 22px;
  margin-top: 22px;
  align-items: start;
}

.flow-stack,
.flow-form,
.info-stack,
.support-links,
.hint-list,
.checklist {
  display: grid;
  gap: 16px;
}

.flow-form {
  margin-top: 22px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.field {
  display: grid;
  gap: 8px;
}

.field.full {
  grid-column: 1 / -1;
}

.field label,
.check-item strong {
  color: var(--text-on-dark);
  font-weight: 600;
}

.field input {
  width: 100%;
  min-height: 50px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-on-dark);
  font: inherit;
}

.field input::placeholder {
  color: rgba(232, 240, 247, 0.42);
}

.field-hint,
.support-links a,
.hint-list li,
.status-message,
.info-copy p,
.check-item span {
  color: var(--muted-on-dark);
}

.field-hint {
  font-size: 14px;
  line-height: 1.5;
}

.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hint-list {
  margin: 0;
  padding-left: 18px;
}

.status-message {
  min-height: 24px;
  font-size: 15px;
}

.status-message.is-error {
  color: #ffb6ab;
}

.status-message.is-success {
  color: var(--teal);
}

.checklist {
  margin-top: 10px;
}

.check-item {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 12px;
  align-items: start;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
}

.check-item input {
  margin-top: 2px;
  width: 18px;
  height: 18px;
  accent-color: var(--amber);
}

.check-item strong,
.info-copy h2,
.info-copy h3 {
  margin: 0 0 6px;
}

.support-links {
  margin-top: 18px;
}

.support-links a {
  text-decoration: none;
}

.support-links a:hover {
  color: var(--teal);
}

.info-copy {
  display: grid;
  gap: 12px;
}

.info-copy ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted-on-dark);
}

.verify-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

@media (max-width: 980px) {
  .summary-grid,
  .doc-hero,
  .doc-layout,
  .flow-grid,
  .field-grid {
    grid-template-columns: 1fr;
    display: grid;
  }

  .doc-sidebar {
    width: 100%;
  }
}

@media (max-width: 720px) {
  .site-shell {
    width: min(100% - 20px, 100%);
    padding-top: 18px;
  }

  .site-header {
    align-items: start;
    flex-direction: column;
  }

  .card,
  .site-header,
  .site-nav {
    border-radius: 20px;
  }

  .card {
    padding: 22px;
  }

  .doc-hero h1 {
    max-width: none;
  }
}