:root {
  --bp-bg: #0a1628;
  --bp-bg-elevated: #0f1d32;
  --bp-bg-surface: #132440;
  --bp-grid: #1a3055;
  --bp-grid-major: #1e3a66;
  --bp-blue: #4a9eff;
  --bp-blue-dim: #2d7dd2;
  --bp-blue-bright: #7ab8ff;
  --bp-cyan: #5ec4d4;
  --bp-green: #34c759;
  --bp-text: #c8d6e5;
  --bp-text-dim: #6b839e;
  --bp-text-muted: #3d5a80;
  --bp-border: #1e3a66;
  --bp-border-light: #162d50;
  --bp-header-h: 48px;
  --bp-sidebar-w: 240px;
  --bp-max-w: 880px;
  --bp-font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --bp-mono: "JetBrains Mono", "SF Mono", SFMono-Regular, ui-monospace, Menlo, Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--bp-font);
  font-size: 14px;
  line-height: 1.7;
  color: var(--bp-text);
  background: var(--bp-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 39px, var(--bp-grid) 39px, var(--bp-grid) 40px),
    repeating-linear-gradient(90deg, transparent, transparent 39px, var(--bp-grid) 39px, var(--bp-grid) 40px);
  background-size: 40px 40px;
  opacity: 0.25;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 199px, var(--bp-grid-major) 199px, var(--bp-grid-major) 200px),
    repeating-linear-gradient(90deg, transparent, transparent 199px, var(--bp-grid-major) 199px, var(--bp-grid-major) 200px);
  background-size: 200px 200px;
  opacity: 0.3;
}

/* ─── Header ──────────────────────────────────────────────── */
.bp-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--bp-header-h);
  background: rgba(10, 22, 40, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--bp-border);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 1.5rem;
  z-index: 100;
}

.bp-header-inner {
  display: flex;
  align-items: center;
  width: 100%;
  max-width: 1200px;
}

.bp-logo {
  font-family: var(--bp-mono);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--bp-blue);
  text-decoration: none;
  letter-spacing: 0.02em;
  margin-right: 2.5rem;
  white-space: nowrap;
}

.bp-logo:hover { color: var(--bp-blue-bright); text-decoration: none; }
.bp-logo-mark { color: var(--bp-green); margin-right: 0.15rem; }

.bp-nav { display: flex; gap: 1.25rem; }

.bp-nav a {
  color: var(--bp-text-dim);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.25rem 0;
  transition: color 0.15s;
}

.bp-nav a:hover { color: var(--bp-blue); text-decoration: none; }

.bp-header-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-left: 1.25rem;
}

.bp-sidebar-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--bp-border);
  background: transparent;
  color: var(--bp-text-dim);
  cursor: pointer;
  transition: all 0.15s;
}

.bp-sidebar-toggle:hover { border-color: var(--bp-blue-dim); color: var(--bp-blue); }

/* ─── Layout ──────────────────────────────────────────────── */
.bp-container {
  position: relative;
  z-index: 1;
  padding-top: var(--bp-header-h);
  min-height: 100vh;
}

.bp-container--docs {
  display: flex;
  max-width: 1200px;
  margin: 0 auto;
}

.bp-main {
  max-width: var(--bp-max-w);
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.bp-main--docs {
  flex: 1;
  min-width: 0;
  max-width: none;
  margin: 0;
  padding: 2.5rem 3rem;
}

.bp-main--landing {
  max-width: 960px;
}

/* ─── Sidebar ─────────────────────────────────────────────── */
.bp-sidebar {
  width: var(--bp-sidebar-w);
  flex-shrink: 0;
  border-right: 1px solid var(--bp-border-light);
  padding: 1.5rem 0;
  position: sticky;
  top: var(--bp-header-h);
  height: calc(100vh - var(--bp-header-h));
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--bp-border) transparent;
}

.bp-sidebar::-webkit-scrollbar { width: 4px; }
.bp-sidebar::-webkit-scrollbar-track { background: transparent; }
.bp-sidebar::-webkit-scrollbar-thumb { background: var(--bp-border); border-radius: 2px; }

.bp-sidebar-nav { padding: 0 1.25rem; }

.bp-sidebar-section { margin-bottom: 1.5rem; }

.bp-sidebar-heading {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bp-text-muted);
  margin-bottom: 0.5rem;
  padding: 0 0.5rem;
}

.bp-sidebar-link {
  display: block;
  padding: 0.3rem 0.5rem;
  font-size: 0.82rem;
  color: var(--bp-text-dim);
  text-decoration: none;
  border-radius: 4px;
  transition: all 0.15s;
  line-height: 1.5;
}

.bp-sidebar-link:hover {
  color: var(--bp-blue);
  background: rgba(74, 158, 255, 0.06);
  text-decoration: none;
}

.bp-sidebar-link.active {
  color: var(--bp-blue);
  background: rgba(74, 158, 255, 0.1);
  font-weight: 500;
}

/* ─── Document Header ─────────────────────────────────────── */
.bp-doc-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--bp-border);
}

.bp-doc-header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--bp-blue-bright);
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin-bottom: 0.5rem;
}

.bp-doc-meta { display: flex; gap: 1rem; align-items: center; }

.bp-meta-label {
  font-family: var(--bp-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--bp-text-muted);
  text-transform: uppercase;
}

/* ─── Content Typography ──────────────────────────────────── */
.bp-content h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--bp-blue-bright);
  margin: 0 0 0.75rem 0;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.bp-content h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--bp-blue);
  margin: 2.5rem 0 0.75rem 0;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--bp-border-light);
  letter-spacing: 0.01em;
}

.bp-content h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--bp-cyan);
  margin: 2rem 0 0.5rem 0;
}

.bp-content h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--bp-text);
  margin: 1.5rem 0 0.5rem 0;
  letter-spacing: 0.02em;
}

.bp-content p {
  margin-bottom: 1rem;
  line-height: 1.8;
}

.bp-content ul, .bp-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.bp-content li {
  margin-bottom: 0.35rem;
  line-height: 1.7;
}

.bp-content li::marker { color: var(--bp-text-muted); }

.bp-content strong { color: var(--bp-text); font-weight: 600; }

/* ─── Links ───────────────────────────────────────────────── */
a { color: var(--bp-blue); text-decoration: none; }
a:hover { color: var(--bp-blue-bright); text-decoration: underline; }

/* ─── Code ────────────────────────────────────────────────── */
code {
  font-family: var(--bp-mono);
  background: var(--bp-bg-surface);
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
  font-size: 0.85em;
  color: var(--bp-cyan);
  border: 1px solid var(--bp-border-light);
}

pre {
  font-family: var(--bp-mono);
  padding: 1.25rem 1.5rem;
  border-radius: 0;
  overflow-x: auto;
  border: 1px solid var(--bp-border);
  margin: 1rem 0 1.5rem 0;
  line-height: 1.6;
  background: var(--bp-bg-elevated);
}

pre code,
pre code.hljs {
  background: var(--bp-bg-elevated) !important;
  padding: 0;
  font-size: 0.82rem;
  border: none;
  color: var(--bp-text);
}

/* ─── Tables ──────────────────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem 0;
  font-size: 0.82rem;
  border: 1px solid var(--bp-border);
}

th {
  text-align: left;
  padding: 0.6rem 0.85rem;
  border-bottom: 2px solid var(--bp-blue-dim);
  font-weight: 600;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--bp-blue);
  background: var(--bp-bg-elevated);
}

td {
  padding: 0.5rem 0.85rem;
  border-bottom: 1px solid var(--bp-border-light);
  vertical-align: top;
  color: var(--bp-text);
}

tr:hover td { background: rgba(74, 158, 255, 0.04); }

/* ─── Blockquote ──────────────────────────────────────────── */
blockquote {
  border-left: 3px solid var(--bp-blue-dim);
  padding: 0.75rem 1.25rem;
  margin: 1rem 0;
  background: var(--bp-bg-elevated);
  color: var(--bp-text-dim);
  font-style: italic;
}

blockquote p { margin-bottom: 0; }

/* ─── Images ──────────────────────────────────────────────── */
img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--bp-border);
}

/* ─── HR ──────────────────────────────────────────────────── */
hr {
  border: none;
  border-top: 1px dashed var(--bp-border);
  margin: 2rem 0;
}

/* ─── Section List ────────────────────────────────────────── */
.bp-spec-list {
  list-style: none;
  padding: 0;
}

.bp-spec-list li {
  margin-bottom: 0;
  padding: 1rem 1.25rem;
  background: var(--bp-bg-elevated);
  border: 1px solid var(--bp-border-light);
  border-bottom: none;
  transition: border-color 0.15s;
}

.bp-spec-list li:first-child { border-top: 1px solid var(--bp-border-light); }
.bp-spec-list li:last-child { border-bottom: 1px solid var(--bp-border-light); }
.bp-spec-list li:hover { border-color: var(--bp-blue-dim); }
.bp-spec-list li + li:hover { border-top-color: var(--bp-blue-dim); }
.bp-spec-list li a { font-weight: 500; color: var(--bp-blue); font-size: 0.9rem; }
.bp-spec-list li a:hover { color: var(--bp-blue-bright); text-decoration: none; }

ul.section-list { list-style: none; padding: 0; }

ul.section-list li {
  margin-bottom: 0;
  padding: 1rem 1.25rem;
  background: var(--bp-bg-elevated);
  border: 1px solid var(--bp-border-light);
  border-bottom: none;
}

ul.section-list li:first-child { border-top: 1px solid var(--bp-border-light); }
ul.section-list li:last-child { border-bottom: 1px solid var(--bp-border-light); }
ul.section-list li:hover { border-color: var(--bp-blue-dim); }
ul.section-list li a { font-weight: 500; color: var(--bp-blue); }

/* ─── Hero (Landing) ─────────────────────────────────────── */
.bp-hero {
  text-align: center;
  padding: 3rem 0 2.5rem;
}

.bp-hero-badge {
  display: inline-block;
  font-family: var(--bp-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  padding: 0.2rem 0.7rem;
  border: 1px solid var(--bp-green);
  color: var(--bp-green);
  background: rgba(52, 199, 89, 0.08);
  margin-bottom: 1.25rem;
}

.bp-hero-title {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--bp-blue-bright);
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  line-height: 1.2;
}

.bp-hero-desc {
  font-size: 1rem;
  color: var(--bp-text-dim);
  max-width: 560px;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

.bp-hero-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 2.5rem;
}

.bp-hero-demo {
  text-align: left;
  max-width: 560px;
  margin: 0 auto;
}

.bp-hero-demo pre {
  border-left: 3px solid var(--bp-green);
  font-size: 0.82rem;
}

.bp-demo-prompt { color: var(--bp-green); font-weight: 600; }
.bp-demo-output { color: var(--bp-text-dim); }

/* ─── Features Grid ───────────────────────────────────────── */
.bp-features {
  margin: 2rem 0 2.5rem;
}

.bp-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;
  background: var(--bp-border-light);
  border: 1px solid var(--bp-border-light);
}

.bp-feature-card {
  padding: 1.25rem;
  background: var(--bp-bg-elevated);
  transition: background 0.15s;
}

.bp-feature-card:hover { background: var(--bp-bg-surface); }

.bp-feature-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--bp-blue);
  margin-bottom: 0.35rem;
}

.bp-feature-desc {
  font-size: 0.78rem;
  color: var(--bp-text-dim);
  line-height: 1.5;
}

.bp-nav-card {
  display: block;
  padding: 1.25rem;
  background: var(--bp-bg-elevated);
  text-decoration: none;
  transition: background 0.15s;
}

.bp-nav-card:hover { background: var(--bp-bg-surface); text-decoration: none; }
.bp-nav-card-title { font-size: 0.85rem; font-weight: 600; color: var(--bp-blue); margin-bottom: 0.3rem; }
.bp-nav-card-desc { font-size: 0.72rem; color: var(--bp-text-dim); line-height: 1.5; }

/* ─── Home Sections ───────────────────────────────────────── */
.bp-home-section {
  margin-bottom: 2.5rem;
}

.bp-home-section-title {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--bp-blue);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--bp-border-light);
}

/* ─── Buttons ─────────────────────────────────────────────── */
.bp-btn {
  display: inline-block;
  font-family: var(--bp-mono);
  padding: 0.55rem 1.5rem;
  border: 1px solid var(--bp-blue-dim);
  color: var(--bp-blue);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: all 0.15s;
}

.bp-btn:hover {
  background: rgba(74, 158, 255, 0.1);
  color: var(--bp-blue-bright);
  text-decoration: none;
}

.bp-btn--primary {
  background: var(--bp-blue);
  color: var(--bp-bg);
  border-color: var(--bp-blue);
}

.bp-btn--primary:hover {
  background: var(--bp-blue-bright);
  color: var(--bp-bg);
  border-color: var(--bp-blue-bright);
}

/* ─── Search Trigger ──────────────────────────────────────── */
.bp-search-trigger {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--bp-border);
  background: transparent;
  color: var(--bp-text-dim);
  font-size: 0.72rem;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--bp-font);
  letter-spacing: 0.03em;
}

.bp-search-trigger:hover { border-color: var(--bp-blue-dim); color: var(--bp-blue); }

.bp-search-trigger kbd {
  font-size: 0.62rem;
  padding: 0.1rem 0.3rem;
  border: 1px solid var(--bp-border);
  background: var(--bp-bg-surface);
  color: var(--bp-text-muted);
  font-family: var(--bp-mono);
  line-height: 1.4;
}

/* ─── Search Overlay ──────────────────────────────────────── */
.search-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 22, 40, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 200;
  justify-content: center;
  padding-top: 12vh;
}

.search-overlay.active { display: flex; }

.search-modal {
  width: 560px;
  max-width: 90vw;
  max-height: 70vh;
  background: var(--bp-bg-elevated);
  border: 1px solid var(--bp-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  align-self: flex-start;
}

.search-input-wrap {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--bp-border-light);
}

.search-input-wrap svg { flex-shrink: 0; color: var(--bp-text-muted); }

.search-input-wrap input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 0.9rem;
  font-family: var(--bp-font);
  color: var(--bp-text);
  background: transparent;
}

.search-input-wrap input::placeholder { color: var(--bp-text-muted); }

.search-input-wrap kbd {
  font-size: 0.62rem;
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--bp-border);
  background: var(--bp-bg-surface);
  color: var(--bp-text-muted);
  font-family: var(--bp-mono);
  cursor: pointer;
  line-height: 1.4;
}

.search-results { overflow-y: auto; padding: 0.5rem; }

.search-result-item {
  display: block;
  padding: 0.6rem 0.75rem;
  text-decoration: none;
  color: var(--bp-text);
  cursor: pointer;
  transition: background 0.1s;
}

.search-result-item:hover, .search-result-item.active { background: var(--bp-bg-surface); text-decoration: none; }
.search-result-item .search-result-title { font-weight: 500; font-size: 0.85rem; margin-bottom: 0.15rem; color: var(--bp-blue); }
.search-result-item .search-result-snippet { font-size: 0.75rem; color: var(--bp-text-dim); line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.search-result-item .search-result-snippet mark { background: rgba(74, 158, 255, 0.2); color: var(--bp-blue-bright); border-radius: 0; padding: 0 1px; }
.search-no-results { padding: 2rem 1rem; text-align: center; color: var(--bp-text-muted); font-size: 0.82rem; }

.search-hint {
  padding: 0.5rem 0.75rem;
  display: flex;
  gap: 1rem;
  justify-content: center;
  border-top: 1px solid var(--bp-border-light);
  color: var(--bp-text-muted);
  font-size: 0.65rem;
}

.search-hint kbd {
  font-size: 0.6rem;
  padding: 0 0.3rem;
  border: 1px solid var(--bp-border);
  background: var(--bp-bg-surface);
  font-family: var(--bp-mono);
  line-height: 1.4;
}

/* ─── Tags ────────────────────────────────────────────────── */
.tag {
  display: inline-block;
  background: transparent;
  padding: 0.15rem 0.5rem;
  font-size: 0.68rem;
  color: var(--bp-text-dim);
  text-decoration: none;
  border: 1px solid var(--bp-border);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-family: var(--bp-mono);
  transition: all 0.15s;
}

.tag:hover {
  background: rgba(74, 158, 255, 0.1);
  color: var(--bp-blue);
  border-color: var(--bp-blue-dim);
  text-decoration: none;
}

/* ─── Pagination ──────────────────────────────────────────── */
nav.pagination { margin: 1.5rem 0; }
nav.pagination .pagination-list { list-style: none; display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }
nav.pagination a { display: inline-block; padding: 0.25rem 0.55rem; border: 1px solid var(--bp-border); color: var(--bp-text-dim); text-decoration: none; font-size: 0.82rem; }
nav.pagination a:hover { color: var(--bp-blue); border-color: var(--bp-blue-dim); text-decoration: none; }
.pagination-current span { display: inline-block; padding: 0.25rem 0.55rem; border: 1px solid var(--bp-blue); color: var(--bp-blue); font-size: 0.82rem; }
.pagination-disabled span { display: inline-block; padding: 0.25rem 0.55rem; border: 1px solid var(--bp-border-light); color: var(--bp-text-muted); opacity: 0.5; font-size: 0.82rem; }

/* ─── Footer ──────────────────────────────────────────────── */
.bp-footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--bp-border);
}

.bp-footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.bp-footer-item {
  font-family: var(--bp-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--bp-text-muted);
}

.bp-footer-item a {
  color: var(--bp-text-muted);
  text-decoration: none;
}

.bp-footer-item a:hover { color: var(--bp-blue); }

/* ─── 404 ─────────────────────────────────────────────────── */
.bp-error {
  text-align: center;
  padding: 4rem 2rem;
}

.bp-error-code {
  font-family: var(--bp-mono);
  font-size: 4rem;
  font-weight: 700;
  color: var(--bp-blue-dim);
  letter-spacing: 0.1em;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.bp-error-label {
  font-family: var(--bp-mono);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  color: var(--bp-text-muted);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.bp-error p {
  color: var(--bp-text-dim);
  font-size: 0.85rem;
  margin-bottom: 2rem;
}

/* ─── Selection ───────────────────────────────────────────── */
::selection { background: rgba(74, 158, 255, 0.25); }

/* ─── Responsive ──────────────────────────────────────────── */
@media (max-width: 840px) {
  .bp-sidebar-toggle { display: flex; }

  .bp-sidebar {
    position: fixed;
    top: var(--bp-header-h);
    left: 0;
    bottom: 0;
    z-index: 50;
    background: var(--bp-bg);
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    border-right: 1px solid var(--bp-border);
  }

  .bp-sidebar.open {
    transform: translateX(0);
  }

  .bp-main--docs {
    padding: 2rem 1.25rem;
  }
}

@media (max-width: 640px) {
  .bp-nav { display: none; }
  .bp-main { padding: 1.5rem 1rem; }
  .bp-main--docs { padding: 1.5rem 1rem; }
  .bp-doc-header h1 { font-size: 1.25rem; }
  .bp-hero-title { font-size: 1.5rem; }
  .bp-hero-actions { flex-direction: column; align-items: center; }
  .bp-footer-grid { flex-direction: column; gap: 0.25rem; align-items: flex-start; }
  .bp-nav-grid { grid-template-columns: 1fr; }
}