/**
 * ONA Visual Lab — Documentation stylesheet
 * Shared across all documentation pages.
 * Requires: ../assets/css/tokens.css
 */

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

body {
  font-family: Inter, sans-serif;
  background: var(--p-bg-950);
  color: var(--p-text-100);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-size: 15px;
  line-height: 1.7;
}

/* ── Layout shell ──────────────────────────────────────────────────────────── */

.doc-shell {
  display: flex;
  flex: 1;
  min-height: 0;
}

/* ── Topbar ────────────────────────────────────────────────────────────────── */

.doc-topbar {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: 0 1.5rem;
  height: 48px;
  background: var(--p-bg-900);
  border-bottom: 1px solid var(--p-border-600);
  font-size: .8rem;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.doc-topbar__logo {
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: -.01em;
  color: var(--p-text-100);
  text-decoration: none;
}

.doc-topbar__sep { flex: 1; }

.doc-topbar__link {
  color: var(--p-text-400);
  text-decoration: none;
  font-size: .75rem;
  padding: .3rem .6rem;
  border-radius: 5px;
  transition: background .12s, color .12s;
}

.doc-topbar__link:hover {
  background: var(--p-bg-800);
  color: var(--p-text-100);
}

/* ── Sidebar nav ───────────────────────────────────────────────────────────── */

.doc-sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--p-bg-900);
  border-right: 1px solid var(--p-border-600);
  padding: 2rem 0 3rem;
  position: sticky;
  top: 48px;
  height: calc(100vh - 48px);
  overflow-y: auto;
}

.doc-nav__section {
  font-size: .65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--p-text-400);
  padding: 0 1.25rem;
  margin-bottom: .5rem;
  margin-top: 1.5rem;
}

.doc-nav__section:first-child { margin-top: 0; }

.doc-nav__link {
  display: block;
  padding: .38rem 1.25rem;
  font-size: .8rem;
  color: var(--p-text-400);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: all .12s;
}

.doc-nav__link:hover {
  color: var(--p-text-100);
  background: var(--p-bg-800);
}

.doc-nav__link--active {
  color: var(--p-blue-400);
  border-left-color: var(--p-blue-500);
  background: rgba(79, 110, 247, .07);
}

/* ── Main content ──────────────────────────────────────────────────────────── */

.doc-main {
  flex: 1;
  min-width: 0;
  padding: 3rem 4rem 5rem;
  max-width: 820px;
}

/* ── Typography ────────────────────────────────────────────────────────────── */

.doc-eyebrow {
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--p-blue-400);
  margin-bottom: .6rem;
}

.doc-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -.03em;
  color: var(--p-text-100);
  line-height: 1.2;
  margin-bottom: .75rem;
}

.doc-lead {
  font-size: 1rem;
  color: var(--p-text-400);
  line-height: 1.75;
  margin-bottom: 2.5rem;
  max-width: 600px;
}

h2.doc-h2 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--p-text-100);
  margin-top: 2.5rem;
  margin-bottom: .9rem;
  letter-spacing: -.01em;
}

h3.doc-h3 {
  font-size: .9rem;
  font-weight: 700;
  color: var(--p-text-100);
  margin-top: 1.75rem;
  margin-bottom: .6rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}

p { color: var(--p-text-400); margin-bottom: 1rem; }

strong { color: var(--p-text-100); font-weight: 600; }

a { color: var(--p-blue-400); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Divider ───────────────────────────────────────────────────────────────── */

.doc-divider {
  border: none;
  border-top: 1px solid var(--p-border-600);
  margin: 2.5rem 0;
}

/* ── Step list ─────────────────────────────────────────────────────────────── */

.doc-steps {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin: 1.5rem 0 2rem;
}

.doc-step {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.doc-step__num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--p-blue-500);
  color: #fff;
  font-size: .72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: .1rem;
}

.doc-step__body { flex: 1; }
.doc-step__title { font-size: .9rem; font-weight: 700; color: var(--p-text-100); margin-bottom: .25rem; }
.doc-step__desc { font-size: .85rem; color: var(--p-text-400); line-height: 1.65; }

/* ── Info / tip box ────────────────────────────────────────────────────────── */

.doc-callout {
  background: var(--p-bg-800);
  border: 1px solid var(--p-border-600);
  border-left: 3px solid var(--p-blue-500);
  border-radius: 0 8px 8px 0;
  padding: .9rem 1.1rem;
  margin: 1.5rem 0;
  font-size: .83rem;
  color: var(--p-text-400);
  line-height: 1.65;
}

.doc-callout--tip  { border-left-color: #34d399; }
.doc-callout--warn { border-left-color: #fbbf24; }

.doc-callout__label {
  font-size: .65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--p-blue-400);
  margin-bottom: .3rem;
}

.doc-callout--tip  .doc-callout__label { color: #34d399; }
.doc-callout--warn .doc-callout__label { color: #fbbf24; }

/* ── Feature grid ──────────────────────────────────────────────────────────── */

.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: .85rem;
  margin: 1.25rem 0 2rem;
}

.doc-card {
  background: var(--p-bg-900);
  border: 1px solid var(--p-border-600);
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  transition: border-color .15s;
}

.doc-card:hover { border-color: rgba(79,110,247,.4); }

.doc-card__icon  { font-size: 1.3rem; margin-bottom: .5rem; }
.doc-card__title { font-size: .85rem; font-weight: 700; color: var(--p-text-100); margin-bottom: .3rem; }
.doc-card__desc  { font-size: .78rem; color: var(--p-text-400); line-height: 1.55; }

/* ── Diagram / flow ────────────────────────────────────────────────────────── */

.doc-flow {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
  margin: 1.5rem 0 2rem;
}

.doc-flow__node {
  background: var(--p-bg-800);
  border: 1px solid var(--p-border-600);
  border-radius: 8px;
  padding: .6rem 1rem;
  font-size: .82rem;
  font-weight: 600;
  color: var(--p-text-100);
  text-align: center;
}

.doc-flow__node--highlight {
  border-color: var(--p-blue-500);
  color: var(--p-blue-400);
}

.doc-flow__arrow {
  color: var(--p-text-400);
  font-size: .9rem;
  flex-shrink: 0;
}

/* ── Table ─────────────────────────────────────────────────────────────────── */

.doc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .82rem;
  margin: 1.25rem 0 2rem;
}

.doc-table th {
  text-align: left;
  font-weight: 700;
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--p-text-400);
  padding: .55rem .85rem;
  border-bottom: 1px solid var(--p-border-600);
}

.doc-table td {
  padding: .6rem .85rem;
  color: var(--p-text-400);
  border-bottom: 1px solid rgba(45,50,72,.6);
  vertical-align: top;
}

.doc-table td:first-child { color: var(--p-text-100); font-weight: 500; }

/* ── Code block ────────────────────────────────────────────────────────────── */

.doc-code {
  background: var(--p-bg-800);
  border: 1px solid var(--p-border-600);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: .78rem;
  color: var(--p-text-100);
  line-height: 1.75;
  overflow-x: auto;
  margin: 1rem 0 1.5rem;
  white-space: pre;
}

code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: .82em;
  background: var(--p-bg-800);
  color: var(--p-blue-400);
  border-radius: 4px;
  padding: .1em .35em;
}

/* ── CTA button ────────────────────────────────────────────────────────────── */

.doc-btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .55rem 1.1rem;
  background: var(--p-blue-500);
  color: #fff;
  border-radius: 7px;
  font-size: .82rem;
  font-weight: 600;
  text-decoration: none;
  transition: background .12s;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.doc-btn:hover { background: var(--p-blue-600); text-decoration: none; color: #fff; }

.doc-btn--ghost {
  background: transparent;
  border: 1px solid var(--p-border-600);
  color: var(--p-text-400);
}

.doc-btn--ghost:hover {
  background: var(--p-bg-800);
  color: var(--p-text-100);
}

/* ── Page nav (prev/next) ──────────────────────────────────────────────────── */

.doc-page-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--p-border-600);
  gap: 1rem;
}

.doc-page-nav__link {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  text-decoration: none;
  padding: .6rem .9rem;
  border-radius: 8px;
  border: 1px solid var(--p-border-600);
  transition: all .12s;
  max-width: 220px;
}

.doc-page-nav__link:hover {
  border-color: rgba(79,110,247,.4);
  background: var(--p-bg-900);
  text-decoration: none;
}

.doc-page-nav__label {
  font-size: .65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--p-text-400);
}

.doc-page-nav__title {
  font-size: .82rem;
  font-weight: 600;
  color: var(--p-blue-400);
}

.doc-page-nav__link--next { text-align: right; margin-left: auto; }

/* ── Lens badge ────────────────────────────────────────────────────────────── */

.doc-badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .18rem .5rem;
  border-radius: 4px;
  font-size: .7rem;
  font-weight: 600;
  background: var(--p-bg-800);
  border: 1px solid var(--p-border-600);
  color: var(--p-text-400);
  vertical-align: middle;
}

.doc-badge--blue  { border-color: rgba(79,110,247,.4); color: var(--p-blue-400); }
.doc-badge--gold  { border-color: rgba(251,191,36,.4); color: #fbbf24; }
.doc-badge--green { border-color: rgba(52,211,153,.4); color: #34d399; }
.doc-badge--red   { border-color: rgba(248,113,113,.4); color: #f87171; }

/* ── Responsive ────────────────────────────────────────────────────────────── */

@media (max-width: 900px) {
  .doc-sidebar { display: none; }
  .doc-main { padding: 2rem 1.5rem 4rem; }
}