/* Feature docs — self-contained ResearcherOS tokens + layout */

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #06060a;
  --bg-elevated: #0e0e14;
  --glass: rgba(18, 18, 28, 0.72);
  --border: rgba(255, 255, 255, 0.08);
  --text: #f4f4ff;
  --muted: #8b8ca8;
  --pink: #ff6bcb;
  --purple: #9b5cff;
  --cyan: #3de8ff;
  --orange: #ff9a5c;
  --lime: #b8ff5c;
  --grad-hero: linear-gradient(135deg, var(--pink) 0%, var(--purple) 45%, var(--cyan) 100%);
  --surface-topbar: rgba(6, 6, 10, 0.85);
  --surface-card: rgba(255, 255, 255, 0.07);
  --surface-card-hover: rgba(255, 255, 255, 0.14);
  --bg-mesh-center: #0c0c12;
  --grid-line: rgba(255, 255, 255, 0.02);
  --btn-fill: rgba(255, 255, 255, 0.05);
  --btn-fill-hover: rgba(255, 255, 255, 0.1);
  --btn-border: rgba(255, 255, 255, 0.12);
  --code-bg: rgba(255, 255, 255, 0.08);
  --link: #9ed4ff;
  --logo-filter: drop-shadow(0 0 12px rgba(255, 107, 203, 0.35));
  --shadow-path: 0 16px 40px rgba(0, 0, 0, 0.45);
  --chip-bg: rgba(255, 255, 255, 0.08);
  --callout-bg: color-mix(in srgb, var(--purple) 18%, transparent);
  --mesh-a: rgba(255, 107, 203, 0.12);
  --mesh-b: rgba(61, 232, 255, 0.1);
  --mesh-c: rgba(155, 92, 255, 0.14);
}

:root,
[data-theme="light"] {
  color-scheme: light;
  --bg: #eef1f6;
  --bg-elevated: #ffffff;
  --glass: rgba(255, 255, 255, 0.94);
  --border: rgba(0, 0, 0, 0.1);
  --text: #1a1d26;
  --muted: #5c6370;
  --pink: #c93d9a;
  --purple: #6b42d4;
  --cyan: #0a8fad;
  --orange: #c96a2e;
  --lime: #5a9e18;
  --grad-hero: linear-gradient(135deg, #ff6bcb 0%, #9b5cff 45%, #3de8ff 100%);
  --surface-topbar: rgba(255, 255, 255, 0.92);
  --surface-card: #ffffff;
  --surface-card-hover: #f3f5f9;
  --bg-mesh-center: #f6f8fc;
  --grid-line: rgba(0, 0, 0, 0.05);
  --btn-fill: rgba(0, 0, 0, 0.04);
  --btn-fill-hover: rgba(0, 0, 0, 0.07);
  --btn-border: rgba(0, 0, 0, 0.12);
  --code-bg: rgba(0, 0, 0, 0.06);
  --link: #0a6b8a;
  --logo-filter: none;
  --shadow-path: 0 14px 36px rgba(30, 36, 52, 0.1);
  --chip-bg: rgba(107, 66, 212, 0.08);
  --callout-bg: color-mix(in srgb, var(--purple) 10%, #fff);
  --mesh-a: rgba(201, 61, 154, 0.07);
  --mesh-b: rgba(10, 143, 173, 0.06);
  --mesh-c: rgba(107, 66, 212, 0.06);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, sans-serif;
  font-size: 1.05rem;
  line-height: 1.5;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 15% 20%, var(--mesh-a) 0%, transparent 55%),
    radial-gradient(ellipse 60% 45% at 85% 15%, var(--mesh-b) 0%, transparent 50%),
    radial-gradient(ellipse 70% 55% at 50% 90%, var(--mesh-c) 0%, transparent 55%),
    radial-gradient(circle at 50% 50%, var(--bg-mesh-center) 0%, var(--bg) 70%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 45%, black 20%, transparent 75%);
}

body > * {
  position: relative;
  z-index: 1;
}

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

a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--pink);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--purple);
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: var(--surface-topbar);
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  width: min(88rem, calc(100% - 2rem));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.brand__name {
  font-family: Inter, sans-serif;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  background: var(--grad-hero);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: var(--logo-filter);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.85rem;
  font-size: 0.92rem;
  font-weight: 600;
}

.nav a {
  text-decoration: none;
  color: var(--muted);
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--text);
}

.btn-theme {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.35rem;
  height: 2.35rem;
  border-radius: 999px;
  border: 1px solid var(--btn-border);
  background: var(--btn-fill);
  color: var(--text);
  cursor: pointer;
  padding: 0;
}

.btn-theme:hover {
  background: var(--btn-fill-hover);
}

.btn-theme svg {
  width: 1.1rem;
  height: 1.1rem;
}

[data-theme="light"] .theme-icon-moon {
  display: none;
}

[data-theme="dark"] .theme-icon-sun {
  display: none;
}

.docs-layout {
  width: min(88rem, calc(100% - 2rem));
  margin-inline: auto;
  display: grid;
  grid-template-columns: 15.5rem minmax(0, 1fr);
  gap: 2rem;
  align-items: start;
  padding: 1.25rem 0 4rem;
}

.docs-sidebar {
  position: sticky;
  top: 4.25rem;
  max-height: calc(100vh - 5rem);
  overflow: auto;
  padding: 0.15rem 0.75rem 1rem 0;
  border-right: 1px solid var(--border);
}

.docs-sidebar__label {
  margin: 0 0 0.85rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.docs-sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
}

.docs-sidebar__group {
  margin: 1rem 0 0.35rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--muted) 85%, var(--text));
}

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

.docs-sidebar__nav > a {
  display: block;
  padding: 0.32rem 0.55rem;
  margin-right: 0.35rem;
  border-radius: 0.4rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.35;
}

.docs-sidebar__nav > a:hover {
  color: var(--text);
  background: var(--btn-fill);
}

.docs-sidebar__nav > a[aria-current="page"] {
  color: var(--text);
  font-weight: 600;
  background: color-mix(in srgb, var(--purple) 12%, transparent);
}

.docs-sidebar__toc {
  display: flex;
  flex-direction: column;
  gap: 0.08rem;
  margin: 0.15rem 0 0.35rem 0.55rem;
  padding-left: 0.65rem;
  border-left: 2px solid var(--border);
}

.docs-sidebar__toc-label {
  margin: 0.15rem 0 0.2rem;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--muted) 80%, transparent);
}

.docs-sidebar__toc a {
  display: block;
  padding: 0.2rem 0.35rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  border-radius: 0.3rem;
}

.docs-sidebar__toc a:hover {
  color: var(--text);
}

.docs-main {
  min-width: 0;
  padding-top: 0.15rem;
}

.features-md {
  width: 100%;
  max-width: 52rem;
}

/* legacy shells (unused) */
.features-shell {
  width: min(72rem, calc(100% - 2rem));
  margin-inline: auto;
  padding: 1.25rem 0 4rem;
}

.schema-frame,
.layer-grid,
.feature-list {
  width: 100%;
  box-sizing: border-box;
}

.features-md > h1:first-child {
  font-family: Inter, sans-serif;
  font-size: clamp(1.85rem, 3.5vw, 2.55rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin: 0 0 0.55rem;
  line-height: 1.12;
}

.features-md .lead {
  margin: 0 0 1.75rem;
  max-width: none;
  width: 100%;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.55;
}

.features-md h2 {
  font-family: Inter, sans-serif;
  font-size: 1.28rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 2.35rem 0 0.75rem;
}

.features-md h3 {
  font-family: Inter, sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  margin: 1.5rem 0 0.55rem;
}

.features-md > p,
.features-md > ul,
.features-md > ol {
  max-width: none;
  width: 100%;
  color: color-mix(in srgb, var(--text) 88%, var(--muted));
}

.features-md li + li {
  margin-top: 0.35rem;
}

.features-md a {
  color: var(--link);
}

.features-md table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0 1.25rem;
  font-size: 0.92rem;
}

.features-md th,
.features-md td {
  text-align: left;
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  color: color-mix(in srgb, var(--text) 88%, var(--muted));
}

.features-md th {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-weight: 600;
}

.features-md pre {
  margin: 0.75rem 0 1.25rem;
  padding: 0.9rem 1.05rem;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: color-mix(in srgb, var(--surface-card) 75%, transparent);
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.5;
}

.features-md pre code {
  background: transparent;
  padding: 0;
}

.layer-grid {
  display: grid;
  gap: 0.85rem;
  margin: 1rem 0 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(15.5rem, 1fr));
}

.layer-card {
  padding: 1rem 1.1rem 1.15rem;
  border: 1px solid var(--border);
  border-radius: 0.85rem;
  background: color-mix(in srgb, var(--surface-card) 88%, transparent);
  box-shadow: var(--shadow-path);
}

.layer-card__kicker {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.layer-card h3 {
  margin: 0 0 0.45rem;
  font-family: Inter, sans-serif;
  font-size: 1.08rem;
}

.layer-card p {
  margin: 0;
  font-size: 0.92rem;
  color: color-mix(in srgb, var(--text) 86%, var(--muted));
  line-height: 1.45;
}

.layer-card--project {
  border-color: color-mix(in srgb, var(--cyan) 28%, var(--border));
}

.layer-card--local {
  border-color: color-mix(in srgb, var(--purple) 28%, var(--border));
}

.layer-card--hub {
  border-color: color-mix(in srgb, var(--pink) 28%, var(--border));
}

.schema-frame {
  margin: 1rem 0 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.95rem;
  overflow: hidden;
  background: color-mix(in srgb, var(--glass) 70%, transparent);
  box-shadow: var(--shadow-path);
}

.schema-frame iframe {
  display: block;
  width: 100%;
  border: 0;
  background: var(--bg);
}

/* Full diagram: height set from width in JS (1360×930) */
.schema-frame--embed {
  overflow: hidden;
  max-width: 100%;
}

.schema-frame--embed iframe {
  width: 100%;
  height: 480px; /* fallback until JS runs */
  background: #eef1f6;
}

[data-theme="dark"] .schema-frame--embed iframe {
  background: #06060a;
}

.media-slot {
  margin: 1rem 0 1.35rem;
  padding: 1.35rem 1.1rem;
  border: 1px dashed color-mix(in srgb, var(--purple) 35%, var(--border));
  border-radius: 0.85rem;
  background: color-mix(in srgb, var(--callout-bg) 55%, transparent);
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.media-slot strong {
  display: block;
  color: var(--text);
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.media-slot[data-filled="true"] {
  padding: 0;
  border-style: solid;
  background: transparent;
  text-align: left;
}

.media-slot[data-filled="true"] img,
.media-slot[data-filled="true"] video {
  display: block;
  width: 100%;
  border-radius: 0.85rem;
  border: 1px solid var(--border);
}

.feature-list {
  display: grid;
  gap: 0.55rem;
  margin: 1rem 0 0;
}

.feature-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.75rem 1rem;
  align-items: start;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: color-mix(in srgb, var(--surface-card) 80%, transparent);
  text-decoration: none;
  color: inherit;
  transition: 140ms ease;
}

.feature-row:hover {
  background: var(--surface-card-hover);
  border-color: color-mix(in srgb, var(--cyan) 22%, var(--border));
}

.feature-row__num {
  font-family: Inter, sans-serif;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--cyan);
  padding-top: 0.12rem;
}

.feature-row__title {
  margin: 0;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text);
}

.feature-row__desc {
  margin: 0.25rem 0 0;
  font-size: 0.86rem;
  color: var(--muted);
  line-height: 1.4;
}

.feature-row__meta {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.feature-row.is-stub {
  opacity: 0.72;
  pointer-events: none;
}

.callout {
  margin: 1.25rem 0;
  padding: 0.9rem 1.05rem;
  border-radius: 0.75rem;
  border: 1px solid color-mix(in srgb, var(--purple) 28%, var(--border));
  background: var(--callout-bg);
  max-width: none;
  width: 100%;
  box-sizing: border-box;
  font-size: 0.92rem;
  line-height: 1.5;
  color: color-mix(in srgb, var(--text) 90%, var(--muted));
}

.callout strong {
  color: var(--text);
}

.tree-list {
  margin: 0.75rem 0 1rem;
  padding: 0.9rem 1.05rem;
  max-width: none;
  width: 100%;
  box-sizing: border-box;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: color-mix(in srgb, var(--surface-card) 75%, transparent);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.82rem;
  line-height: 1.55;
  color: color-mix(in srgb, var(--text) 88%, var(--muted));
  overflow-x: auto;
}

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

.features-md .loading,
.features-md .error {
  color: var(--muted);
  padding: 2rem 0;
}

@media (max-width: 900px) {
  .docs-layout {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .docs-sidebar {
    position: static;
    max-height: none;
    overflow: visible;
    padding: 0 0 1rem;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .docs-sidebar__nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.25rem 0.15rem;
  }

  .docs-sidebar__group,
  .docs-sidebar__label,
  .docs-sidebar__toc {
    display: none;
  }

  .docs-sidebar__nav > a {
    margin-right: 0;
  }
}

@media (max-width: 640px) {
  .feature-row {
    grid-template-columns: auto 1fr;
  }
  .feature-row__meta {
    grid-column: 2;
  }
}

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