/* Documentation pages: Stripe / OpenAPI style */

.docs-body {
  background: #fff;
}

:root {
  --space-docs-main-y: 40px;
  --space-docs-main-x: 40px;
  --space-docs-section: 36px;
  --space-docs-block: 32px;
}

.docs-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.docs-header .nav {
  height: 64px;
}

.docs-header .logo-desc {
  display: none;
}

.docs-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  max-width: 1200px;
  margin: 0 auto;
  min-height: calc(100vh - 64px);
}

.docs-sidebar {
  padding: 24px 20px 40px 32px;
  border-right: 1px solid var(--border);
  position: sticky;
  top: 64px;
  align-self: start;
  max-height: calc(100vh - 64px);
  overflow-y: auto;
}

.docs-sidebar nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.docs-sidebar a {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 6px 10px;
  border-radius: 6px;
  transition:
    color var(--duration-fast) var(--ease-out),
    background var(--duration-fast) var(--ease-out),
    opacity var(--duration-fast) var(--ease-out);
}

@media (hover: hover) {
  .docs-sidebar a:hover {
    color: var(--text-primary);
    background: var(--bg-muted);
  }
}

.docs-sidebar a.active {
  color: var(--text-primary);
  background: var(--bg-muted);
}

.docs-sidebar .sidebar-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin: 20px 0 8px 10px;
}

.docs-sidebar .sidebar-label:first-child {
  margin-top: 0;
}

.docs-main {
  padding: var(--space-docs-main-y) var(--space-docs-main-x) 64px;
  max-width: 760px;
}

.docs-main--wide {
  max-width: 880px;
}

.docs-title {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  line-height: 1.15;
}

.docs-lead {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 24px;
}

.docs-lang-note {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
  margin: -8px 0 24px;
  max-width: 640px;
  font-style: italic;
}

.trust-statement {
  padding: 16px 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0;
  margin-bottom: var(--space-docs-block);
}

.trust-statement p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 6px;
}

.trust-statement p:last-child {
  margin-bottom: 0;
}

.trust-statement strong {
  color: var(--text-primary);
  font-weight: 500;
}

/* Live example on demo */
.live-example {
  margin-bottom: var(--space-docs-block);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.live-example-header {
  padding: 12px 20px;
  background: var(--bg-muted);
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-secondary);
}

.live-example-block {
  padding: 20px;
}

.live-example-block + .live-example-block {
  border-top: 1px solid var(--border);
}

.live-example-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.live-example-block--prompt pre {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-primary);
  white-space: pre-wrap;
}

.live-example-block--response {
  background: var(--success-light);
}

.live-example-block--response ol {
  margin: 12px 0;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.6;
}

.live-example-block--response li {
  padding: 3px 0;
  color: var(--text-primary);
}

.live-example-block--response p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 8px;
}

.version-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.version-entry {
  display: flex;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.version-entry:last-child {
  border-bottom: none;
}

.version-tag {
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  min-width: 48px;
}

.version-detail {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.version-date {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
  opacity: 0.8;
}

/* Meta block */
.meta-block {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 16px;
  padding: 20px 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 24px;
}

.meta-item label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.meta-item span {
  font-size: 14px;
  font-weight: 500;
}

.meta-item .status-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  color: var(--success);
  background: var(--success-light);
  padding: 2px 8px;
  border-radius: 4px;
}

.docs-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: var(--space-docs-block);
}

.btn-docs {
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  cursor: pointer;
  font-family: var(--font);
  color: var(--text-primary);
  box-shadow: var(--shadow-press);
  transition:
    transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    background var(--duration-fast) var(--ease-out);
}

@media (hover: hover) {
  .btn-docs:hover {
    border-color: var(--text-secondary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-hover);
  }

  .btn-docs:active {
    transform: translateY(0);
    box-shadow: var(--shadow-press);
    transition-duration: 100ms;
  }

  .btn-docs--primary:hover {
    background: #333;
  }
}

.btn-docs--primary {
  background: var(--text-primary);
  color: #fff;
  border-color: var(--text-primary);
}

.btn-docs:focus-visible {
  box-shadow: var(--focus-ring);
}

.docs-sidebar a:focus-visible {
  box-shadow: var(--focus-ring);
}

/* Doc sections */
.doc-section {
  margin-bottom: var(--space-docs-section);
  padding-bottom: var(--space-docs-section);
  border-bottom: 1px solid var(--border);
}

.doc-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.doc-section h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.doc-section p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 12px;
}

.doc-section ul {
  margin: 12px 0;
}

.doc-section li {
  font-size: 15px;
  color: var(--text-secondary);
  padding: 4px 0 4px 18px;
  position: relative;
  line-height: 1.55;
}

.doc-section li::before {
  content: '·';
  position: absolute;
  left: 4px;
  color: var(--text-secondary);
}

.doc-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  margin-top: 12px;
}

.doc-card h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
}

.doc-card p,
.doc-card li {
  font-size: 14px;
}

.doc-kv {
  display: grid;
  gap: 8px;
}

.doc-kv dt {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.doc-kv dd {
  font-size: 14px;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.doc-code {
  font-family: var(--mono);
  font-size: 13px;
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 18px;
  overflow-x: auto;
  line-height: 1.6;
  margin: 12px 0;
  white-space: pre-wrap;
}

.docs-footer {
  padding: 24px var(--space-docs-main-x);
  border-top: 1px solid var(--border);
  max-width: 1200px;
  margin: 0 auto;
}

.docs-footer p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.docs-footer-standard {
  border-top: 1px solid var(--border);
  padding: 44px 0 28px;
  margin-top: 0;
}

.docs-footer-standard .footer-grid {
  gap: 48px;
}

.docs-footer-standard .footer-tagline {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
  max-width: 320px;
  line-height: 1.55;
}

/* Official badge — doc layout adjustments */
@media (max-width: 1100px) {
  .official-badge__name,
  .spec-badge__label {
    display: none;
  }

  .docs-header .nav-links {
    margin-right: 88px;
  }
}

@media (max-width: 768px) {
  .official-badge--header,
  .spec-badge--header {
    right: 56px;
    top: 6px;
  }
}

/* Implementation status table */
.impl-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin-top: 12px;
}

.impl-table th,
.impl-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.impl-table th {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  background: var(--bg-muted);
}

.impl-table td:last-child {
  font-weight: 500;
}

.status-stable { color: var(--success); }
.status-available { color: var(--success); }
.status-soon { color: var(--text-secondary); }
.status-planned { color: var(--text-secondary); font-style: italic; }

.doc-links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 16px 0 24px;
  font-size: 14px;
}

.doc-links-row a {
  color: var(--accent);
}

/* RFC architecture diagram */
.arch-rfc {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.5;
  max-width: 420px;
  margin: var(--space-diagram, 32px) auto 20px;
  padding: 24px 28px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-align: center;
}

.arch-rfc-step {
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text-primary);
}

.arch-rfc-step--highlight {
  border-color: rgba(15, 92, 192, 0.25);
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 500;
}

.arch-rfc-step code {
  font-size: 11px;
  display: block;
  margin-top: 4px;
  color: var(--text-secondary);
  font-weight: 400;
}

.arch-rfc-arrow {
  color: var(--text-secondary);
  opacity: 0.45;
  padding: 4px 0;
  font-size: 12px;
}

.arch-rfc-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  padding: 10px 8px;
  border: 1px dashed var(--border);
  border-radius: 6px;
  background: var(--bg);
}

.arch-rfc-row span {
  font-size: 11px;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--card);
}

.arch-rfc-row span.muted {
  border-style: dashed;
  color: var(--text-secondary);
}

/* Prompt action buttons */
.prompt-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.prompt-actions .btn-docs {
  font-size: 12px;
  padding: 7px 12px;
}

/* Coming soon page */
.coming-soon {
  max-width: 560px;
  margin: 0 auto;
  padding: 64px 24px 96px;
  text-align: center;
}

.coming-soon h1 {
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.coming-soon .status-soon {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 24px;
}

.coming-soon p:not(.docs-lang-note) {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.65;
}

.coming-soon .docs-lang-note {
  font-size: 14px;
  line-height: 1.55;
  font-style: italic;
  margin: 12px auto 28px;
  text-align: center;
  max-width: 640px;
}

/* Release notes */
.release-block {
  margin-bottom: var(--space-docs-section);
  padding-bottom: var(--space-docs-section);
  border-bottom: 1px solid var(--border);
}

.release-block:last-child {
  border-bottom: none;
}

.release-block h2 {
  font-family: var(--mono);
  font-size: 1.125rem;
  margin-bottom: 16px;
  color: var(--accent);
}

.release-block ul {
  margin: 0;
}

.release-block li {
  font-size: 15px;
  color: var(--text-secondary);
  padding: 6px 0 6px 18px;
  position: relative;
}

.release-block li::before {
  content: '·';
  position: absolute;
  left: 4px;
}

/* Glossary */
.glossary-term {
  margin-bottom: var(--space-docs-section);
  padding-bottom: var(--space-docs-section);
  border-bottom: 1px solid var(--border);
}

.glossary-term:last-child {
  border-bottom: none;
}

.glossary-term h3 {
  font-size: 16px;
  font-family: var(--mono);
  margin-bottom: 8px;
}

.glossary-term p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Roadmap */
.roadmap-table .status-complete { color: var(--success); }
.roadmap-table .status-planned { color: var(--text-secondary); }

@media (max-width: 900px) {
  .docs-layout {
    grid-template-columns: 1fr;
  }

  .docs-sidebar {
    display: none;
  }

  .docs-main {
    padding: 28px 24px 56px;
  }

  .docs-sidebar {
    padding: 20px 24px;
  }

  .docs-actions {
    flex-direction: column;
  }

  .btn-docs {
    width: 100%;
    text-align: center;
  }
}