/* =========================================================
   NEXORA · INSIGHT ARTICLE STYLESHEET
   For long-form whitepapers / field notes / architecture briefings.
   Dark editorial, matches the homepage system.
   ========================================================= */

:root {
  --bg:          #07090C;
  --bg-1:        #0B0F14;
  --bg-2:        #10151C;
  --bg-3:        #161C24;
  --line:        #1B222C;
  --line-2:      #262E3A;
  --line-3:      #38414F;

  --paper:       #F4F1E8;
  --paper-2:     #D9D5C6;
  --paper-3:     #A8A89C;
  --mute:        #7B8392;
  --mute-2:      #545B68;

  --brand:       #3D6BFF;
  --brand-2:     #6B8DFF;
  --brand-soft:  rgba(61,107,255,0.10);
  --brand-line:  rgba(61,107,255,0.35);

  --ok:          #5BB489;
  --warn:        #D6A35B;
  --hot:         #DB6A52;

  --sans:  'IBM Plex Sans', -apple-system, system-ui, sans-serif;
  --mono:  'IBM Plex Mono', ui-monospace, monospace;
  --serif: 'IBM Plex Serif', Georgia, serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01","cv11";
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background-image:
    linear-gradient(rgba(255,255,255,0.012) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.012) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at 50% 0%, black 0%, transparent 70%);
}

::selection { background: var(--brand); color: var(--paper); }
a { color: inherit; text-decoration: none; }

.wrap {
  width: min(1200px, calc(100% - 80px));
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

/* ─── NAV ─────────────────────────────────────────────── */
.in-nav {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(14px) saturate(140%);
  background: rgba(7,9,12,0.78);
  border-bottom: 1px solid var(--line);
}
.in-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.in-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.04em;
}
.in-brand .m {
  width: 12px; height: 12px;
  background: var(--brand);
  transform: rotate(45deg);
  border-radius: 2px;
}
.in-brand .tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--mute);
  padding-left: 10px;
  margin-left: 4px;
  border-left: 1px solid var(--line-2);
  text-transform: uppercase;
}
.in-nav-meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mute);
  display: flex;
  gap: 24px;
  align-items: center;
}
.in-nav-meta a {
  color: var(--paper-3);
  transition: color .15s ease;
}
.in-nav-meta a:hover { color: var(--paper); }

/* ─── HEADER ──────────────────────────────────────────── */
.in-header {
  padding: 96px 0 56px;
  border-bottom: 1px solid var(--line);
  position: relative;
}
.in-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 700px 500px at 50% 0%, rgba(61,107,255,0.10), transparent 60%);
  pointer-events: none;
}
.in-crumb {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper-3);
  margin-bottom: 32px;
  display: flex;
  gap: 14px;
  align-items: center;
}
.in-crumb a { color: var(--mute); }
.in-crumb a:hover { color: var(--paper); }
.in-crumb .sep { color: var(--mute-2); }
.in-crumb .kind { color: var(--brand); }

.in-title {
  font-family: var(--sans);
  font-weight: 500;
  letter-spacing: -0.032em;
  font-size: clamp(40px, 5.5vw, 72px);
  line-height: 1.0;
  margin: 0 0 28px;
  max-width: 22ch;
  text-wrap: balance;
}
.in-title em { font-style: normal; color: var(--paper-3); }

.in-deck {
  font-size: 19px;
  line-height: 1.5;
  color: var(--paper-2);
  max-width: 64ch;
  margin: 0;
  text-wrap: pretty;
}

.in-meta {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
}
.in-meta span b {
  display: block;
  color: var(--paper);
  font-weight: 500;
  font-size: 12px;
  margin-top: 4px;
}

/* ─── ARTICLE BODY ────────────────────────────────────── */
.in-article {
  padding: 80px 0;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 64px;
  align-items: start;
}
.in-toc {
  position: sticky;
  top: 80px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.in-toc h6 {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--paper-3);
  font-weight: 500;
}
.in-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.in-toc ol li a {
  color: var(--mute);
  display: flex;
  gap: 12px;
  align-items: baseline;
  transition: color .15s ease;
}
.in-toc ol li a:hover { color: var(--paper); }
.in-toc ol li a .n { color: var(--brand); flex-shrink: 0; }

.in-body {
  max-width: 720px;
  font-size: 17px;
  line-height: 1.65;
  color: var(--paper-2);
}
.in-body p { margin: 0 0 22px; text-wrap: pretty; }
.in-body p:first-of-type::first-line {
  font-family: var(--sans);
  color: var(--paper);
}
.in-body p.lead {
  font-size: 19px;
  color: var(--paper);
  margin-bottom: 32px;
}
.in-body a {
  color: var(--brand-2);
  border-bottom: 1px solid var(--brand-line);
  transition: border-color .15s ease, color .15s ease;
}
.in-body a:hover { color: var(--paper); border-color: var(--paper); }
.in-body strong { color: var(--paper); font-weight: 600; }
.in-body em { font-style: italic; }
.in-body code {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--paper);
  background: var(--bg-2);
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: 3px;
}

.in-body h2 {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 32px;
  line-height: 1.1;
  letter-spacing: -0.022em;
  color: var(--paper);
  margin: 64px 0 20px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: baseline;
  gap: 18px;
}
.in-body h2 .n {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--brand);
  text-transform: uppercase;
  font-weight: 600;
  flex-shrink: 0;
  padding-top: 4px;
}
.in-body h3 {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: -0.014em;
  color: var(--paper);
  margin: 36px 0 14px;
}
.in-body h4 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brand);
  margin: 28px 0 10px;
  font-weight: 600;
}

.in-body ul, .in-body ol {
  margin: 0 0 24px;
  padding-left: 22px;
}
.in-body ul li, .in-body ol li {
  margin-bottom: 10px;
  padding-left: 6px;
}
.in-body ul { list-style: none; padding-left: 0; }
.in-body ul li {
  position: relative;
  padding-left: 22px;
}
.in-body ul li::before {
  content: "";
  position: absolute;
  left: 0; top: 13px;
  width: 10px; height: 1px;
  background: var(--brand);
}

.in-body blockquote {
  margin: 32px 0;
  padding: 24px 32px;
  border-left: 2px solid var(--brand);
  background: var(--brand-soft);
  border-radius: 0 6px 6px 0;
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.35;
  color: var(--paper);
  font-style: italic;
}
.in-body blockquote cite {
  display: block;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
  font-style: normal;
}

.in-body figure {
  margin: 36px 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-1);
  overflow: hidden;
}
.in-body figure .fhead {
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mute);
}
.in-body figure .fhead b { color: var(--paper); font-weight: 500; }
.in-body figure .fbody {
  padding: 28px;
  background:
    linear-gradient(rgba(255,255,255,0.012) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.012) 1px, transparent 1px),
    var(--bg-2);
  background-size: 28px 28px;
}
.in-body figure .fbody svg { width: 100%; height: auto; display: block; }
.in-body figure figcaption {
  padding: 14px 24px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--mute);
}

/* numbered question / structured-answer block */
.q-block {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 22px;
  margin: 32px 0;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}
.q-block .qn {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--brand);
  letter-spacing: 0.04em;
}
.q-block .q {
  font-family: var(--sans);
  font-size: 21px;
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--paper);
  margin: 0 0 14px;
  font-weight: 500;
  font-style: italic;
}
.q-block .qb { color: var(--paper-2); margin: 0; font-size: 16px; }
.q-block .qa {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--brand-2);
}
.q-block .qa b { color: var(--paper); font-weight: 600; }

/* callout */
.callout {
  margin: 36px 0;
  padding: 28px 32px;
  border: 1px solid var(--brand-line);
  background: var(--brand-soft);
  border-radius: 8px;
}
.callout .clabel {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brand-2);
  margin-bottom: 12px;
  font-weight: 600;
}
.callout p { margin: 0; color: var(--paper); font-size: 16px; }

/* footnotes */
.in-footnotes {
  margin-top: 80px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}
.in-footnotes h4 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper-3);
  margin: 0 0 18px;
}
.in-footnotes ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.in-footnotes ol li {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 12px;
  font-size: 13.5px;
  color: var(--mute);
  line-height: 1.5;
}
.in-footnotes ol li .fn { color: var(--brand); font-family: var(--mono); font-size: 12px; }
.in-footnotes ol li a { color: var(--paper-2); border-bottom: 1px solid var(--line-3); }

/* ─── FOOTER CTA + RELATED ────────────────────────────── */
.in-cta {
  margin: 96px 0;
  padding: 56px;
  border: 1px solid var(--brand-line);
  background:
    radial-gradient(ellipse 480px 320px at 100% 0%, rgba(61,107,255,0.18), transparent 60%),
    var(--bg-1);
  border-radius: 12px;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
  align-items: center;
}
.in-cta h3 {
  font-size: 32px;
  font-weight: 500;
  letter-spacing: -0.022em;
  line-height: 1.1;
  color: var(--paper);
  margin: 0 0 16px;
}
.in-cta p {
  color: var(--paper-2);
  margin: 0;
  font-size: 16px;
}
.in-cta .actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.in-cta .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  height: 48px;
  padding: 0 24px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  border-radius: 4px;
  border: 1px solid transparent;
  transition: background .15s ease, border-color .15s ease;
  text-decoration: none;
}
.in-cta .btn.primary { background: var(--brand); color: var(--paper); border-color: var(--brand); }
.in-cta .btn.primary:hover { background: var(--brand-2); }
.in-cta .btn.ghost { background: transparent; color: var(--paper); border-color: var(--line-2); }
.in-cta .btn.ghost:hover { border-color: var(--paper-3); }

.in-related {
  border-top: 1px solid var(--line);
  padding: 56px 0;
}
.in-related h4 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper-3);
  margin: 0 0 28px;
  font-weight: 500;
}
.in-related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.in-related-card {
  border: 1px solid var(--line);
  background: var(--bg-1);
  border-radius: 8px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color .15s ease;
}
.in-related-card:hover { border-color: var(--line-3); }
.in-related-card .kind {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brand);
}
.in-related-card h5 {
  font-size: 20px;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.014em;
  color: var(--paper);
  margin: 0;
}
.in-related-card p { color: var(--paper-2); font-size: 14px; margin: 0; }
.in-related-card .read {
  margin-top: auto;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
  padding-top: 14px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
}

/* ─── FOOTER ──────────────────────────────────────────── */
.in-foot {
  border-top: 1px solid var(--line);
  padding: 36px 0;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 18px;
}
.in-foot a:hover { color: var(--paper); }

/* ─── RESPONSIVE ──────────────────────────────────────── */
@media (max-width: 980px) {
  .in-article { grid-template-columns: 1fr; gap: 24px; }
  .in-toc { position: static; }
  .in-meta { grid-template-columns: repeat(2, 1fr); }
  .in-cta { grid-template-columns: 1fr; padding: 36px; }
  .in-related-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .wrap { width: calc(100% - 36px); }
  .in-header { padding: 64px 0 40px; }
  .in-nav-meta { display: none; }
  .q-block { grid-template-columns: 1fr; gap: 8px; }
}