/* ============================================================================
   ABHAVTECH — TECHNICAL INSIGHTS ARTICLE STYLESHEET
   ============================================================================
   Shared by all articles under /articles/.
   Design language: matches hub (abhavtech.com) — heavy grotesque display,
   indigo accent, white paper — with a Medium-style serif reading column.
   Diagram convention (portfolio standard):
     existing/reused = grey  (#eef2f7 fill / #7a8ba0 stroke)
     new components  = blue  (#d7ebf8 fill / #1B6CA0 stroke)
   ============================================================================ */

:root {
  --ink:        #14131c;
  --body-text:  #2e2d38;
  --muted:      #6b6a78;
  --accent:     #4f46e5;   /* hub indigo */
  --accent-dk:  #3730a3;
  --tint:       #f4f3ff;
  --hairline:   #e9e8f0;
  --paper:      #ffffff;
  --code-bg:    #f6f6f9;
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  background: var(--paper);
  color: var(--body-text);
  font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
  font-size: 1.1875rem;          /* 19px reading size */
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

/* ============================================================
   TOP BAR — minimal, links back to hub
   ============================================================ */

.topbar {
  border-bottom: 1px solid var(--hairline);
  background: var(--paper);
}

.topbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.topbar .brand {
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-weight: 900;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

.topbar .brand span { color: var(--accent); }

.topbar .back-link {
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 2px;
}

.topbar .back-link:hover { color: var(--accent-dk); border-color: var(--accent-dk); }

/* ============================================================
   ARTICLE COLUMN
   ============================================================ */

.article {
  max-width: 680px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

/* Eyebrow — category · date (matches hub card style) */
.eyebrow {
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

h1 {
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-weight: 900;
  font-size: clamp(2rem, 5.5vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin-bottom: 1.5rem;
}

/* Byline row */
.byline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  padding: 1.1rem 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  margin-bottom: 2.25rem;
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-size: 0.85rem;
}

.byline .avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #818cf8);
  color: #fff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.byline .who { line-height: 1.35; }
.byline .who .name { font-weight: 700; color: var(--ink); }
.byline .who .role { color: var(--muted); font-size: 0.78rem; }

.byline .meta {
  margin-left: auto;
  color: var(--muted);
  font-size: 0.78rem;
  text-align: right;
  line-height: 1.5;
}

.ai-badge {
  display: inline-block;
  background: var(--tint);
  color: var(--accent-dk);
  border: 1px solid #d9d6fb;
  padding: 2px 10px;
  border-radius: 12px;
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  vertical-align: middle;
}

/* ============================================================
   BODY TYPOGRAPHY
   ============================================================ */

.article p { margin-bottom: 1.5rem; }

.article .lede {
  font-size: 1.32rem;
  line-height: 1.65;
  color: var(--ink);
}

.article h2 {
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-weight: 800;
  font-size: 1.55rem;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 3rem 0 1rem;
  line-height: 1.25;
}

.article h3 {
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-weight: 700;
  font-size: 1.12rem;
  color: var(--ink);
  margin: 2.2rem 0 0.75rem;
  line-height: 1.4;
}

/* Numbered step headings — "01." prefix in accent */
.article h3 .step-no {
  color: var(--accent);
  margin-right: 0.4rem;
}

.article a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: #c4c0f5;
  text-underline-offset: 3px;
}
.article a:hover { color: var(--accent-dk); text-decoration-color: var(--accent-dk); }

.article strong { color: var(--ink); }

.article ul, .article ol {
  margin: 0 0 1.5rem 1.4rem;
}
.article li { margin-bottom: 0.5rem; }

.article blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.25rem 0 0.25rem 1.4rem;
  margin: 2rem 0;
  font-size: 1.3rem;
  line-height: 1.55;
  color: var(--ink);
  font-style: italic;
}

.article code {
  font-family: "Roboto Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.82em;
  background: var(--code-bg);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 0.1em 0.4em;
}

.article pre {
  background: var(--code-bg);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
  margin: 0 0 1.5rem;
}
.article pre code { background: none; border: none; padding: 0; font-size: 0.82rem; line-height: 1.6; }

hr.section-break {
  border: none;
  text-align: center;
  margin: 2.75rem 0;
}
hr.section-break::after {
  content: "· · ·";
  color: var(--muted);
  font-size: 1.2rem;
  letter-spacing: 0.6em;
}

/* ============================================================
   FIGURES — hero + inline diagrams
   ============================================================ */

figure.hero {
  max-width: 1100px;
  margin: 0 auto 3rem;
  padding: 0 1.5rem;
}

/* Diagrams break out of the 680px reading column into a wider band
   so the SVG content is fully readable. The break-out is centered on
   the article column and clamped to viewport width on mobile. */
figure.diagram {
  width: calc(min(1100px, 100vw - 3rem));
  margin: 2.25rem 0 2.25rem calc((680px - min(1100px, 100vw - 3rem)) / 2);
}

figure.hero svg,
figure.diagram svg {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--hairline);
  border-radius: 10px;
}

/* On viewports narrower than the reading column, no break-out needed */
@media (max-width: 720px) {
  figure.diagram {
    width: 100%;
    margin: 2rem 0;
  }
}

figcaption {
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-align: center;
  margin-top: 0.7rem;
}

/* Diagram legend chips */
.legend {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 0.6rem;
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-size: 0.72rem;
  color: var(--muted);
}
.legend .chip { display: inline-flex; align-items: center; gap: 0.4rem; }
.legend .swatch {
  width: 14px; height: 14px; border-radius: 3px; display: inline-block;
}
.legend .swatch.existing { background: #eef2f7; border: 1.5px solid #7a8ba0; }
.legend .swatch.new      { background: #d7ebf8; border: 1.5px solid #1B6CA0; }

/* ============================================================
   RESULTS BAND — key outcomes
   ============================================================ */

.results {
  background: var(--tint);
  border: 1px solid #ddd9fb;
  border-radius: 12px;
  padding: 1.75rem 1.75rem 1rem;
  margin: 2.5rem 0;
}

.results h2 {
  margin-top: 0 !important;
  font-size: 1.2rem !important;
}

.results ul { list-style: none; margin-left: 0; }
.results li {
  padding-left: 1.6rem;
  position: relative;
  margin-bottom: 0.85rem;
  font-size: 1.05rem;
}
.results li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: "Archivo", sans-serif;
  font-weight: 800;
}

/* ============================================================
   CTA — link to the full documentation site
   ============================================================ */

.doc-cta {
  border: 2px solid var(--ink);
  border-radius: 12px;
  padding: 1.75rem;
  margin: 3rem 0 1rem;
}

.doc-cta .cta-eyebrow {
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.doc-cta h3 {
  margin: 0 0 0.6rem !important;
  font-size: 1.25rem !important;
}

.doc-cta p { margin-bottom: 1.1rem; font-size: 1rem; }

.doc-cta .cta-btn {
  display: inline-block;
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #fff;
  background: var(--accent);
  padding: 0.7rem 1.4rem;
  border-radius: 8px;
  text-decoration: none;
}
.doc-cta .cta-btn:hover { background: var(--accent-dk); color: #fff; }

/* ============================================================
   DISCLOSURE NOTE
   ============================================================ */

.disclosure {
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--muted);
  background: var(--code-bg);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 1rem 1.25rem;
  margin: 2.5rem 0 0;
}

/* ============================================================
   FOOTER — globe/abhavtech.com only
   ============================================================ */

.site-footer {
  border-top: 1px solid var(--hairline);
  margin-top: 4rem;
}

.site-footer .footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  font-size: 0.8rem;
  color: var(--muted);
}

.site-footer a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
}
.site-footer a:hover { color: var(--accent-dk); }

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 640px) {
  body { font-size: 1.0625rem; }
  .article { padding: 2rem 1.25rem 3rem; }
  .byline .meta { margin-left: 0; text-align: left; width: 100%; }
  .article .lede { font-size: 1.18rem; }
}

/* Keyboard focus visibility */
a:focus-visible, button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

/* Print */
@media print {
  .topbar, .site-footer, .doc-cta { display: none; }
  .article { max-width: 100%; }
}