/* ==========================================
   Article & Documentation Stylesheet
   ========================================== */

.article-hero {
  max-width: 1180px;
  margin: 0 auto;
  padding: 56px 24px 36px;
}

.kicker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}
.kicker span {
  font-size: 0.82rem;
  font-weight: 600;
  padding: 4px 11px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--lav) 38%, transparent);
  color: var(--ink);
}

.article-hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.7rem);
  max-width: 24ch;
  margin-bottom: 18px;
}

.article-hero .dek {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 62ch;
  line-height: 1.6;
}

.byline {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  color: var(--muted);
  font-size: 0.95rem;
}
.byline b {
  color: var(--ink);
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

/* Article Layout: Sidebar TOC + Main Content */
.layout {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px 80px;
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 56px;
}

nav.toc {
  position: sticky;
  top: calc(env(safe-area-inset-top, 0px) + 84px);
  align-self: start;
  font-size: 0.9rem;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}

nav.toc h4 {
  font-family: var(--sans);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 12px;
  font-weight: 700;
}

nav.toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

nav.toc li {
  margin-bottom: 8px;
}

nav.toc a {
  display: block;
  color: var(--muted);
  text-decoration: none;
  line-height: 1.4;
  transition: color 0.15s ease, transform 0.15s ease;
}

nav.toc a:hover, nav.toc a.active {
  color: var(--ink);
  font-weight: 600;
}

nav.toc a.active {
  color: var(--plum);
  border-left: 2.5px solid var(--plum);
  padding-left: 8px;
  margin-left: -10.5px;
}

/* Main Article Content */
article.content {
  font-size: 1.05rem;
  line-height: 1.7;
}

article.content section {
  margin-bottom: 48px;
  scroll-margin-top: 100px;
}

article.content h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-top: 40px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

article.content h3 {
  font-size: 1.35rem;
  margin-top: 28px;
  margin-bottom: 12px;
}

article.content p {
  margin-bottom: 18px;
  color: var(--ink);
}

article.content ul, article.content ol {
  margin: 0 0 24px 0;
  padding-left: 24px;
}

article.content li {
  margin-bottom: 8px;
}

/* Code Blocks & Inline Code */
code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--code-bg);
  color: var(--code-ink);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--line);
}

pre {
  background: var(--code-bg);
  color: var(--code-ink);
  font-family: var(--mono);
  font-size: 0.9rem;
  padding: 20px;
  border-radius: 12px;
  border: 1px solid var(--line);
  overflow-x: auto;
  line-height: 1.5;
  margin: 24px 0;
  position: relative;
}

pre code {
  background: transparent;
  padding: 0;
  border: 0;
  font-size: 1em;
}

.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--sans);
  transition: background 0.15s ease, color 0.15s ease;
}
.copy-btn:hover {
  background: var(--card);
  color: var(--ink);
}

/* Blockquotes & Callouts */
blockquote {
  margin: 24px 0;
  padding: 16px 22px;
  background: var(--surface);
  border-left: 4px solid var(--plum);
  border-radius: 0 12px 12px 0;
  color: var(--muted);
  font-style: italic;
}
blockquote p {
  margin: 0;
}

/* Tables */
.table-wrap {
  overflow-x: auto;
  margin: 24px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  text-align: left;
}

th, td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}

th {
  background: var(--surface);
  font-weight: 600;
  color: var(--ink);
}

tr:hover td {
  background: color-mix(in srgb, var(--surface) 50%, transparent);
}

@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  nav.toc {
    display: none;
  }
}

/* ==========================================
   Article Hero
   ========================================== */

.article-hero {
  padding-top: 56px;
  padding-bottom: 36px;
}

.article-hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.7rem);
  max-width: 22ch;
  margin-bottom: 18px;
  line-height: 1.15;
}

.article-hero .dek {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 62ch;
  line-height: 1.6;
}

/* ==========================================
   Metric Stat Boxes
   ========================================== */

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 6px 0 22px;
}

.metric {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
}

.metric .v {
  font-family: var(--serif);
  font-size: 1.8rem;
  color: var(--plum);
  line-height: 1.1;
}

.metric p {
  margin: 6px 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

@media (max-width: 620px) {
  .metrics { grid-template-columns: 1fr; }
}

/* ==========================================
   Architecture / Figure Blocks
   ========================================== */

.fig {
  margin: 8px 0 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  overflow-x: auto;
}

.fig figcaption {
  font-size: 0.88rem;
  color: var(--muted);
  margin-top: 10px;
}

pre.mermaid {
  margin: 0;
  background: none;
  border: none;
  text-align: center;
  padding: 0;
  font-size: 1rem;
}

/* ==========================================
   Dark Code Blocks (syntax highlighted)
   ========================================== */

pre.code-block {
  font-family: var(--mono);
  font-size: 0.84rem;
  line-height: 1.6;
  background: #2A2140;
  color: #EDE7F8;
  border-radius: 14px;
  padding: 18px 20px;
  overflow-x: auto;
  margin: 0 0 20px;
  border: none;
}

pre.code-block code {
  background: none;
  padding: 0;
  border: none;
  font-size: inherit;
  color: inherit;
}

pre.code-block .tok-c { color: #B7B1ED; } /* comments */
pre.code-block .tok-k { color: #F5BCCF; } /* keywords */
pre.code-block .tok-s { color: #B7B1ED; } /* strings */

/* ==========================================
   Buy Pipeline Funnel
   ========================================== */

.funnel {
  display: grid;
  gap: 8px;
  margin: 8px 0 22px;
}

.stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 120px;
  gap: 14px;
  align-items: center;
}

.stage .barw {
  height: 46px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  font-weight: 600;
  font-size: 0.92rem;
  color: #2A2140;
  width: var(--w);
  min-width: max-content;
}

.stage .n {
  font-family: var(--serif);
  font-size: 1.15rem;
  color: var(--plum);
}

.stage .n small {
  display: block;
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--muted);
}

@media (max-width: 560px) {
  .stage { grid-template-columns: 1fr; }
  .stage .barw { width: 100%; }
}

/* ==========================================
   Callout
   ========================================== */

.callout {
  background: var(--soft);
  border-left: 4px solid var(--pink);
  border-radius: 0 12px 12px 0;
  padding: 14px 18px;
  margin: 0 0 20px;
  font-size: 0.97rem;
}

/* ==========================================
   Docs Card (CTA at end of article)
   ========================================== */

.docs-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  align-items: center;
  background: var(--plum);
  color: #fff;
  border-radius: 18px;
  padding: 26px 28px;
  margin: 28px 0 20px;
}

.docs-card h3 {
  margin: 0 0 6px;
  color: #fff;
  font-size: 1.2rem;
}

.docs-card p {
  margin: 0;
  color: #EDE6F7;
}

.docs-card a {
  background: var(--pink);
  color: #2A2140;
  text-decoration: none;
  font-weight: 600;
  padding: 11px 18px;
  border-radius: 999px;
  white-space: nowrap;
  font-size: 0.95rem;
}

@media (max-width: 620px) {
  .docs-card { grid-template-columns: 1fr; }
}

/* ==========================================
   Disclaimer & Caption
   ========================================== */

.disclaimer {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 18px;
  font-size: 0.93rem;
  color: var(--muted);
  margin-top: 26px;
}

.caption {
  font-size: 0.92rem;
  color: var(--muted);
  margin-top: -8px;
  margin-bottom: 20px;
}

/* ==========================================
   Three-pillar Cards
   ========================================== */

.pillars3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 6px 0 22px;
}

.p3 {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 5px solid var(--c, var(--peri));
  border-radius: 14px;
  padding: 16px;
}

.p3 b {
  display: block;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.p3 p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
}

@media (max-width: 680px) {
  .pillars3 { grid-template-columns: 1fr; }
}

/* ==========================================
   Chat Transcript
   ========================================== */

.chat {
  display: grid;
  gap: 10px;
  margin: 0 0 20px;
}

.msg {
  max-width: 88%;
  padding: 12px 16px;
  border-radius: 14px;
  font-size: 0.95rem;
  line-height: 1.55;
}

.msg small {
  display: block;
  font-weight: 700;
  font-size: 0.76rem;
  color: var(--muted);
  margin-bottom: 3px;
}

.msg.cust {
  background: var(--surface);
  border: 1px solid var(--line);
}

.msg.adv {
  background: var(--soft);
  border: 1px solid #F3D3DF;
  justify-self: end;
}

.msg mark {
  background: #F5BCCF;
  color: #2A2140;
  border-radius: 4px;
  padding: 0 3px;
}

/* ==========================================
   Status Badge Pills
   ========================================== */

.st {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 999px;
}

.st.red    { background: #F8D5DE; color: #7A1F3D; }
.st.amber  { background: #FBE8C8; color: #6B4A00; }
.st.green  { background: #D9F0E1; color: #1F5A34; }
.st.review { background: #E3DFFA; color: #3E3375; }