/* ═══ COLOR FLOW MAP (from design-spec.theme_context_map) ═══
 *
 * PALETTE:
 *   bg_dark          #181C20  (brand_primary)
 *   bg_dark_alt      #1F2428  (brand_surface)
 *   bg_light         #F2F3F1
 *   bg_white         #FFFFFF
 *   accent_amber     #C8A84B  (decorative)
 *   accent_aa_dark   #D4AF55  (text on dark — 8.4:1)
 *   accent_aa_light  #8B6F1E  (text on light — 5.1:1)
 *   fg_dark_primary  #E8EAE6  (14.2:1 on dark)
 *   fg_dark_secondary #9BA4AD (6.2:1 on dark)
 *   fg_light_primary #181C20  (13.9:1 on light)
 *   fg_light_secondary #3D4550 (8.3:1 on light)
 *   error_green      #4DB88B
 *
 * index.html:        dark-top
 *   nav        → transparent-on-dark (scrolled: solid #181C20)  | logo-light.svg | links: #E8EAE6
 *   hero       → DARK  (#181C20)  | text: #E8EAE6
 *   value-props → DARK-ALT (#1F2428) | text: #E8EAE6
 *   product-overview → DARK (#181C20) | text: #E8EAE6
 *   benchmark-teaser → DARK-ALT (#1F2428) | text: #E8EAE6
 *   how-it-works → DARK (#181C20) | text: #E8EAE6
 *   for-whom    → DARK-ALT (#1F2428) | text: #E8EAE6
 *   research-signal → DARK (#181C20) | text: #E8EAE6
 *   cta-bottom  → DARK-ALT (#1F2428) | text: #E8EAE6
 *   footer      → DARK (#181C20) | text: #9BA4AD
 *
 * about / technology / platform / benchmarks / research / community / contact / docs/index:
 *   ALL dark-top. Same nav + section pattern.
 *
 * docs/quickstart / docs/api-reference / docs/hardware-integration:
 *   light-top — nav SOLID DARK (force-dark)  | logo-light.svg
 *   sections: light (#F2F3F1) + white (#FFFFFF) sub-panels
 *
 * blog/index.html:   light-top
 *   nav SOLID DARK (force-dark)
 *   sections: light + white
 *
 * blog/*.html (articles): light-top — same as blog/index
 *
 * legal/*.html:      light-top — same nav pattern
 *
 * NOTE: On dark-top pages nav starts transparent (white links).
 *       On light-top pages nav is ALWAYS solid dark (never transparent).
 * ═══════════════════════════════════════════════════════════════════ */

/* ─── Custom Properties ─── */
:root {
  --qecs-dark:          #181C20;
  --qecs-dark-alt:      #1F2428;
  --qecs-dark-surface:  #252B32;
  --qecs-code-bg:       #141820;
  --qecs-light:         #F2F3F1;
  --qecs-cream:         #EEF0EC;
  --qecs-white:         #FFFFFF;

  --qecs-accent:        #C8A84B;
  --qecs-accent-dark:   #D4AF55;   /* AA on dark bg */
  --qecs-accent-light:  #8B6F1E;   /* AA on light bg */

  --qecs-fg-d1:         #E8EAE6;   /* primary on dark */
  --qecs-fg-d2:         #9BA4AD;   /* secondary on dark */
  --qecs-fg-d3:         #6B7580;   /* tertiary on dark — use 18px+ only */
  --qecs-fg-l1:         #181C20;   /* primary on light */
  --qecs-fg-l2:         #3D4550;   /* secondary on light */
  --qecs-fg-lm:         #6B7580;   /* muted on light */

  --qecs-green:         #4DB88B;
  --qecs-border-dark:   rgba(255,255,255,0.08);
  --qecs-border-light:  rgba(0,0,0,0.10);

  --qecs-radius:        4px;
  --qecs-radius-card:   8px;
  --qecs-radius-code:   2px;

  --qecs-nav-h:         64px;
  --qecs-section-py:    96px;
  --qecs-container:     1180px;
}

/* ─── Reset & Base ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  background: var(--qecs-dark);
  color: var(--qecs-fg-d1);
  -webkit-font-smoothing: antialiased;
}

/* dark-top pages: body bg dark so transparent nav blends into hero */
body.qecs-page--dark-top {
  background: var(--qecs-dark);
}

/* light-top pages: body bg light */
body.qecs-page--light-top {
  background: var(--qecs-light);
  color: var(--qecs-fg-l1);
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; }
ul, ol { list-style: none; }

/* ─── Typography Scale ─── */
h1, h2, h3, h4, h5 {
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-weight: 300;
  line-height: 1.2;
}

.qecs-mono {
  font-family: 'IBM Plex Mono', 'Consolas', 'Courier New', monospace;
}

/* ─── Container ─── */
.qecs-container {
  max-width: var(--qecs-container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── Section ─── */
.qecs-section {
  padding: var(--qecs-section-py) 0;
}

.qecs-section--dark     { background: var(--qecs-dark); }
.qecs-section--dark-alt { background: var(--qecs-dark-alt); }
.qecs-section--light    { background: var(--qecs-light); }
.qecs-section--white    { background: var(--qecs-white); }
.qecs-section--cream    { background: var(--qecs-cream); }

/* Section text defaults per bg context */
.qecs-section--dark h1,
.qecs-section--dark h2,
.qecs-section--dark h3,
.qecs-section--dark h4,
.qecs-section--dark p,
.qecs-section--dark li       { color: var(--qecs-fg-d1); }

.qecs-section--dark-alt h1,
.qecs-section--dark-alt h2,
.qecs-section--dark-alt h3,
.qecs-section--dark-alt h4,
.qecs-section--dark-alt p,
.qecs-section--dark-alt li   { color: var(--qecs-fg-d1); }

.qecs-section--light h1,
.qecs-section--light h2,
.qecs-section--light h3,
.qecs-section--light h4,
.qecs-section--light p,
.qecs-section--light li      { color: var(--qecs-fg-l1); }

.qecs-section--white h1,
.qecs-section--white h2,
.qecs-section--white h3,
.qecs-section--white h4,
.qecs-section--white p,
.qecs-section--white li      { color: var(--qecs-fg-l1); }

/* ─── Eyebrow / Overline ─── */
.qecs-eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 12px;
}

.qecs-section--dark .qecs-eyebrow,
.qecs-section--dark-alt .qecs-eyebrow  { color: var(--qecs-accent-dark); }

.qecs-section--light .qecs-eyebrow,
.qecs-section--white .qecs-eyebrow,
.qecs-section--cream .qecs-eyebrow     { color: var(--qecs-accent-light); }

.qecs-footer .qecs-eyebrow             { color: var(--qecs-accent-dark); }

/* ─── Buttons ─── */
.qecs-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 10px 22px;
  border-radius: var(--qecs-radius);
  border: 1.5px solid transparent;
  transition: background 0.18s, color 0.18s, border-color 0.18s, opacity 0.18s;
  white-space: nowrap;
  text-decoration: none;
  cursor: pointer;
}

/* Primary: amber bg, dark text */
.qecs-btn--primary {
  background: var(--qecs-accent);
  color: var(--qecs-dark);
  border-color: var(--qecs-accent);
}
.qecs-btn--primary:hover {
  background: var(--qecs-accent-dark);
  border-color: var(--qecs-accent-dark);
  color: var(--qecs-dark);
}

/* Ghost on dark */
.qecs-btn--ghost-dark {
  background: transparent;
  color: var(--qecs-fg-d1);
  border-color: rgba(232,234,230,0.35);
}
.qecs-btn--ghost-dark:hover {
  border-color: var(--qecs-fg-d1);
  background: rgba(232,234,230,0.06);
}

/* Ghost on light */
.qecs-btn--ghost-light {
  background: transparent;
  color: var(--qecs-fg-l1);
  border-color: rgba(24,28,32,0.3);
}
.qecs-btn--ghost-light:hover {
  border-color: var(--qecs-fg-l1);
  background: rgba(24,28,32,0.04);
}

/* Outline on dark */
.qecs-btn--outline-dark {
  background: transparent;
  color: var(--qecs-accent-dark);
  border-color: var(--qecs-accent-dark);
}
.qecs-btn--outline-dark:hover {
  background: rgba(200,168,75,0.1);
}

/* Secondary: dark surface */
.qecs-btn--secondary {
  background: var(--qecs-dark-surface);
  color: var(--qecs-fg-d1);
  border-color: var(--qecs-border-dark);
}
.qecs-btn--secondary:hover {
  border-color: var(--qecs-accent-dark);
  color: var(--qecs-accent-dark);
}

/* ─── Nav ─── */
.qecs-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--qecs-nav-h);
  display: flex;
  align-items: center;
  transition: background 0.25s, box-shadow 0.25s;
}

/* Dark-top pages: transparent at scroll=0, solid on scroll */
body.qecs-page--dark-top .qecs-nav {
  background: transparent;
}
body.qecs-page--dark-top .qecs-nav.qecs-nav--scrolled {
  background: var(--qecs-dark);
  box-shadow: 0 1px 0 var(--qecs-border-dark);
}

/* Light-top pages: always solid dark */
body.qecs-page--light-top .qecs-nav {
  background: var(--qecs-dark);
  box-shadow: 0 1px 0 var(--qecs-border-dark);
}

.qecs-nav__inner {
  max-width: var(--qecs-container);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

.qecs-nav__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}
.qecs-nav__logo img {
  height: 32px;
  width: auto;
  max-width: 180px;
}

.qecs-nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.qecs-nav__link {
  font-size: 14px;
  font-weight: 400;
  padding: 6px 12px;
  border-radius: var(--qecs-radius);
  transition: color 0.15s, background 0.15s;
  color: var(--qecs-fg-d1);
  text-decoration: none;
  white-space: nowrap;
}
.qecs-nav__link:hover {
  color: var(--qecs-accent-dark);
  background: rgba(200,168,75,0.08);
}

/* Dropdown nav item */
.qecs-nav__item--dropdown {
  position: relative;
}

.qecs-nav__dropdown-toggle {
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 14px;
  font-weight: 400;
  padding: 6px 12px;
  border-radius: var(--qecs-radius);
  color: var(--qecs-fg-d1);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: color 0.15s, background 0.15s;
}
.qecs-nav__dropdown-toggle:hover {
  color: var(--qecs-accent-dark);
  background: rgba(200,168,75,0.08);
}
.qecs-nav__dropdown-toggle .qecs-nav__chevron {
  font-size: 10px;
  transition: transform 0.2s;
}
.qecs-nav__item--dropdown:hover .qecs-nav__chevron,
.qecs-nav__item--dropdown.is-open .qecs-nav__chevron {
  transform: rotate(180deg);
}

/* Dropdown menu — inherits dark nav color */
.qecs-nav__dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 220px;
  background: var(--qecs-dark);
  border: 1px solid var(--qecs-border-dark);
  border-radius: var(--qecs-radius-card);
  padding: 6px 0;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px);
  transition: opacity 0.18s, transform 0.18s;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
.qecs-nav__item--dropdown:hover .qecs-nav__dropdown-menu,
.qecs-nav__item--dropdown.is-open .qecs-nav__dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.qecs-nav__dropdown-menu a {
  display: block;
  padding: 9px 18px;
  font-size: 13px;
  color: var(--qecs-fg-d2);
  transition: color 0.12s, background 0.12s;
  text-decoration: none;
}
.qecs-nav__dropdown-menu a:hover {
  color: var(--qecs-fg-d1);
  background: rgba(255,255,255,0.05);
}

.qecs-nav__cta {
  margin-left: auto;
  flex-shrink: 0;
}

/* Hamburger — mobile only */
.qecs-nav__hamburger {
  display: none;
  background: none;
  border: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  margin-left: auto;
  cursor: pointer;
}
.qecs-nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--qecs-fg-d1);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}
.qecs-nav__hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.qecs-nav__hamburger.is-open span:nth-child(2) { opacity: 0; }
.qecs-nav__hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
.qecs-nav__mobile {
  display: none;
  position: fixed;
  top: var(--qecs-nav-h);
  left: 0; right: 0;
  background: var(--qecs-dark);
  border-top: 1px solid var(--qecs-border-dark);
  padding: 16px 24px 24px;
  z-index: 999;
  max-height: calc(100vh - var(--qecs-nav-h));
  overflow-y: auto;
}
.qecs-nav__mobile.is-open { display: block; }

.qecs-nav__mobile-link {
  display: block;
  font-size: 15px;
  color: var(--qecs-fg-d1);
  padding: 10px 0;
  border-bottom: 1px solid var(--qecs-border-dark);
  text-decoration: none;
}
.qecs-nav__mobile-link:hover { color: var(--qecs-accent-dark); }

.qecs-nav__mobile-sub {
  padding-left: 16px;
}
.qecs-nav__mobile-sub a {
  display: block;
  font-size: 14px;
  color: var(--qecs-fg-d2);
  padding: 8px 0;
  text-decoration: none;
}
.qecs-nav__mobile-sub a:hover { color: var(--qecs-accent-dark); }

.qecs-nav__mobile-cta {
  margin-top: 16px;
  display: block;
  text-align: center;
}

/* ─── Hero ─── */
.qecs-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--qecs-nav-h);
  background: var(--qecs-dark);
  position: relative;
  overflow: hidden;
}

.qecs-hero__inner {
  max-width: var(--qecs-container);
  margin: 0 auto;
  padding: 80px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.qecs-hero__content { }

.qecs-hero__headline {
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 300;
  color: var(--qecs-fg-d1);
  margin-bottom: 20px;
  line-height: 1.15;
}
.qecs-hero__headline em {
  font-style: normal;
  color: var(--qecs-accent-dark);
}

.qecs-hero__subhead {
  font-size: 17px;
  color: var(--qecs-fg-d2);
  margin-bottom: 36px;
  line-height: 1.6;
  max-width: 500px;
}

.qecs-hero__actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.qecs-hero__visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Sub-page hero (lighter weight than index) */
.qecs-subhero {
  padding-top: var(--qecs-nav-h);
  background: var(--qecs-dark);
}
.qecs-subhero__inner {
  max-width: var(--qecs-container);
  margin: 0 auto;
  padding: 80px 24px 72px;
}

.qecs-subhero__overline {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--qecs-accent-dark);
  margin-bottom: 16px;
  display: block;
}

.qecs-subhero__headline {
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 300;
  color: var(--qecs-fg-d1);
  margin-bottom: 16px;
  max-width: 700px;
}
.qecs-subhero__headline em {
  font-style: normal;
  color: var(--qecs-accent-dark);
}

.qecs-subhero__sub {
  font-size: 16px;
  color: var(--qecs-fg-d2);
  max-width: 620px;
  line-height: 1.6;
}

/* Light-top subhero */
.qecs-subhero--light {
  background: var(--qecs-light);
}
.qecs-subhero--light .qecs-subhero__headline {
  color: var(--qecs-fg-l1);
}
.qecs-subhero--light .qecs-subhero__sub {
  color: var(--qecs-fg-l2);
}
.qecs-subhero--light .qecs-subhero__overline {
  color: var(--qecs-accent-light);
}

/* ─── Surface Code SVG Animation ─── */
.qecs-lattice-svg {
  width: 100%;
  max-width: 440px;
}

/* Syndrome cell animation — CSS keyframes */
@keyframes qecs-syndrome-pulse {
  0%, 100% { opacity: 0.15; }
  50%       { opacity: 1; }
}
@keyframes qecs-syndrome-detect {
  0%   { fill: rgba(200,168,75,0); }
  30%  { fill: rgba(200,168,75,0.9); }
  70%  { fill: rgba(200,168,75,0.9); }
  100% { fill: rgba(200,168,75,0); }
}

.qecs-syndrome--a { animation: qecs-syndrome-detect 3.2s ease-in-out 0.0s infinite; }
.qecs-syndrome--b { animation: qecs-syndrome-detect 3.2s ease-in-out 0.8s infinite; }
.qecs-syndrome--c { animation: qecs-syndrome-detect 3.2s ease-in-out 1.6s infinite; }
.qecs-syndrome--d { animation: qecs-syndrome-detect 3.2s ease-in-out 2.4s infinite; }

/* ─── Value Prop Cards ─── */
.qecs-value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.qecs-value-card {
  background: var(--qecs-dark-surface);
  border: 1px solid var(--qecs-border-dark);
  border-radius: var(--qecs-radius-card);
  padding: 28px 24px;
}

.qecs-value-card__icon {
  width: 40px;
  height: 40px;
  background: rgba(200,168,75,0.12);
  border-radius: var(--qecs-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--qecs-accent-dark);
  font-size: 18px;
}

.qecs-value-card__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--qecs-fg-d1);
  margin-bottom: 8px;
}

.qecs-value-card__desc {
  font-size: 14px;
  color: var(--qecs-fg-d2);
  line-height: 1.55;
}

/* ─── Section headings ─── */
.qecs-section__label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}

.qecs-section--dark .qecs-section__label,
.qecs-section--dark-alt .qecs-section__label { color: var(--qecs-accent-dark); }

.qecs-section--light .qecs-section__label,
.qecs-section--white .qecs-section__label { color: var(--qecs-accent-light); }

.qecs-section__heading {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 300;
  margin-bottom: 14px;
}

.qecs-section--dark .qecs-section__heading,
.qecs-section--dark-alt .qecs-section__heading { color: var(--qecs-fg-d1); }

.qecs-section--light .qecs-section__heading,
.qecs-section--white .qecs-section__heading  { color: var(--qecs-fg-l1); }

.qecs-section__sub {
  font-size: 16px;
  max-width: 600px;
  line-height: 1.6;
}

.qecs-section--dark .qecs-section__sub,
.qecs-section--dark-alt .qecs-section__sub  { color: var(--qecs-fg-d2); }

.qecs-section--light .qecs-section__sub,
.qecs-section--white .qecs-section__sub     { color: var(--qecs-fg-l2); }

/* ─── Benchmark Metrics ─── */
.qecs-metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  border: 1px solid var(--qecs-border-dark);
  border-radius: var(--qecs-radius-card);
  overflow: hidden;
}

.qecs-metric {
  background: var(--qecs-dark-surface);
  padding: 28px 20px;
  text-align: center;
}

.qecs-metric__number {
  font-family: 'IBM Plex Mono', monospace;
  font-size: clamp(24px, 2.5vw, 36px);
  font-weight: 600;
  color: var(--qecs-accent-dark);
  display: block;
  line-height: 1.1;
  margin-bottom: 8px;
}

.qecs-metric__label {
  font-size: 13px;
  color: var(--qecs-fg-d2);
  line-height: 1.4;
}

.qecs-metric__caveat {
  margin-top: 20px;
  font-size: 12px;
  color: var(--qecs-fg-d3);
  text-align: center;
  font-family: 'IBM Plex Mono', monospace;
}

/* ─── Process / How it works ─── */
.qecs-process {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  position: relative;
}

.qecs-process::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(16.66% + 28px);
  right: calc(16.66% + 28px);
  height: 1px;
  background: var(--qecs-border-dark);
}

.qecs-process__step {
  padding: 0 24px;
  text-align: center;
}

.qecs-process__num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 1.5px solid var(--qecs-accent-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 20px;
  font-weight: 600;
  color: var(--qecs-accent-dark);
  background: var(--qecs-dark);
  position: relative;
  z-index: 1;
}

.qecs-process__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--qecs-fg-d1);
  margin-bottom: 10px;
}

.qecs-process__desc {
  font-size: 14px;
  color: var(--qecs-fg-d2);
  line-height: 1.55;
}

/* ─── For Whom / Two Column ─── */
.qecs-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.qecs-audience-card {
  border-top: 2px solid var(--qecs-accent);
  padding-top: 24px;
}

.qecs-audience-card__tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--qecs-accent-dark);
  margin-bottom: 12px;
  display: block;
}

.qecs-audience-card__title {
  font-size: 22px;
  font-weight: 300;
  color: var(--qecs-fg-d1);
  margin-bottom: 12px;
}

.qecs-audience-card__desc {
  font-size: 14px;
  color: var(--qecs-fg-d2);
  margin-bottom: 16px;
  line-height: 1.55;
}

.qecs-audience-card__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.qecs-audience-card__list li {
  font-size: 13px;
  color: var(--qecs-fg-d2);
  padding-left: 18px;
  position: relative;
}

.qecs-audience-card__list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--qecs-accent-dark);
}

/* ─── Research Signal ─── */
.qecs-research-signal {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 64px;
  align-items: start;
}

/* ─── CTA Band ─── */
.qecs-cta-band {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.qecs-cta-band__heading {
  font-size: 22px;
  font-weight: 300;
  color: var(--qecs-fg-d1);
  margin-bottom: 20px;
  line-height: 1.3;
}

.qecs-cta-band__right {
  border-left: 1px solid var(--qecs-border-dark);
  padding-left: 48px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.qecs-cta-band__right-heading {
  font-size: 18px;
  font-weight: 300;
  color: var(--qecs-fg-d1);
}

/* ─── Cards (Platform, etc.) ─── */
.qecs-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.qecs-card {
  background: var(--qecs-dark-surface);
  border: 1px solid var(--qecs-border-dark);
  border-radius: var(--qecs-radius-card);
  padding: 28px;
  transition: border-color 0.2s;
}
.qecs-card:hover {
  border-color: rgba(200,168,75,0.3);
}

.qecs-card__icon {
  font-size: 24px;
  color: var(--qecs-accent-dark);
  margin-bottom: 16px;
}

.qecs-card__title {
  font-size: 18px;
  font-weight: 600;
  color: var(--qecs-fg-d1);
  margin-bottom: 12px;
}

.qecs-card__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.qecs-card__list li {
  font-size: 13px;
  color: var(--qecs-fg-d2);
  padding-left: 18px;
  position: relative;
}

.qecs-card__list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--qecs-accent-dark);
  font-weight: 600;
}

.qecs-card__link {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  font-weight: 500;
  color: var(--qecs-accent-dark);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.15s;
}
.qecs-card__link:hover { gap: 10px; }

/* ─── Inline Code Blocks ─── */
.qecs-code-block {
  background: var(--qecs-code-bg);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--qecs-radius-card);
  overflow: hidden;
}

.qecs-code-block__chrome {
  background: #1E2228;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.qecs-code-block__dots {
  display: flex;
  gap: 6px;
}
.qecs-code-block__dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.qecs-code-block__dot--red    { background: #FF5F57; }
.qecs-code-block__dot--yellow { background: #FEBC2E; }
.qecs-code-block__dot--green  { background: #28C840; }

.qecs-code-block__title {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: rgba(232,234,230,0.45);
  margin-left: 4px;
}

.qecs-code-block pre {
  padding: 16px 20px;
  overflow-x: auto;
  white-space: pre;
  line-height: 1.5;
}

.qecs-code-block code {
  font-family: 'IBM Plex Mono', 'Consolas', monospace;
  font-size: 13px;
  color: var(--qecs-fg-d1);
}

/* Syntax colors */
.qecs-code-block .qecs-tt-keyword  { color: #569CD6; }
.qecs-code-block .qecs-tt-string   { color: #CE9178; }
.qecs-code-block .qecs-tt-comment  { color: #6A9955; }
.qecs-code-block .qecs-tt-fn       { color: #DCDCAA; }
.qecs-code-block .qecs-tt-num      { color: var(--qecs-accent-dark); }
.qecs-code-block .qecs-tt-prompt   { color: var(--qecs-accent-dark); }
.qecs-code-block .qecs-tt-output   { color: var(--qecs-fg-d2); }

/* ─── Docs Layout ─── */
.qecs-docs-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 0;
  min-height: calc(100vh - var(--qecs-nav-h));
  padding-top: var(--qecs-nav-h);
}

.qecs-docs-sidebar {
  background: var(--qecs-light);
  border-right: 1px solid var(--qecs-border-light);
  padding: 40px 0;
  position: sticky;
  top: var(--qecs-nav-h);
  max-height: calc(100vh - var(--qecs-nav-h));
  overflow-y: auto;
}

.qecs-docs-sidebar__section {
  margin-bottom: 24px;
  padding: 0 20px;
}

.qecs-docs-sidebar__heading {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--qecs-accent-light);
  margin-bottom: 8px;
  display: block;
}

.qecs-docs-sidebar a {
  display: block;
  font-size: 13px;
  color: var(--qecs-fg-lm);
  padding: 5px 8px;
  border-radius: var(--qecs-radius);
  transition: color 0.12s, background 0.12s;
  text-decoration: none;
}
.qecs-docs-sidebar a:hover,
.qecs-docs-sidebar a.is-active {
  color: var(--qecs-fg-l1);
  background: rgba(24,28,32,0.07);
}

body.qecs-page--light-top .qecs-docs-sidebar .qecs-docs-sidebar__heading { color: var(--qecs-accent-light); }
body.qecs-page--light-top .qecs-docs-sidebar a { color: var(--qecs-fg-lm); }
body.qecs-page--light-top .qecs-docs-sidebar a:hover,
body.qecs-page--light-top .qecs-docs-sidebar a.is-active { color: var(--qecs-fg-l1); }

.qecs-docs-main {
  background: var(--qecs-white);
  padding: 48px 56px;
  max-width: 860px;
}

/* Docs content — light-top scoped */
body.qecs-page--light-top .qecs-docs-main h1 { font-size: 32px; font-weight: 300; color: var(--qecs-fg-l1); margin-bottom: 12px; }
body.qecs-page--light-top .qecs-docs-main h2 { font-size: 22px; font-weight: 400; color: var(--qecs-fg-l1); margin: 36px 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--qecs-border-light); }
body.qecs-page--light-top .qecs-docs-main h3 { font-size: 17px; font-weight: 600; color: var(--qecs-fg-l1); margin: 24px 0 8px; }
body.qecs-page--light-top .qecs-docs-main p  { font-size: 15px; color: var(--qecs-fg-l2); margin-bottom: 14px; line-height: 1.7; }
body.qecs-page--light-top .qecs-docs-main ul,
body.qecs-page--light-top .qecs-docs-main ol { padding-left: 20px; margin-bottom: 14px; }
body.qecs-page--light-top .qecs-docs-main li { font-size: 15px; color: var(--qecs-fg-l2); margin-bottom: 6px; line-height: 1.55; }
body.qecs-page--light-top .qecs-docs-main ul { list-style: disc; }
body.qecs-page--light-top .qecs-docs-main ol { list-style: decimal; }
body.qecs-page--light-top .qecs-docs-main a  { color: var(--qecs-accent-light); text-decoration: underline; }
body.qecs-page--light-top .qecs-docs-main a:hover { color: var(--qecs-accent); }
body.qecs-page--light-top .qecs-docs-main code { font-family: 'IBM Plex Mono', monospace; font-size: 13px; background: var(--qecs-light); padding: 2px 6px; border-radius: var(--qecs-radius-code); color: var(--qecs-fg-l1); }
body.qecs-page--light-top .qecs-docs-main .qecs-docs-version { font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--qecs-fg-lm); background: var(--qecs-light); padding: 3px 8px; border-radius: 20px; display: inline-block; margin-bottom: 24px; }

/* docs-content shared container — theme-scoped per design-spec S11 guard */
body.qecs-page--dark-top .qecs-docs-content h2 { font-size: 22px; font-weight: 400; color: var(--qecs-fg-d1); margin: 32px 0 12px; }
body.qecs-page--dark-top .qecs-docs-content h3 { font-size: 17px; font-weight: 600; color: var(--qecs-fg-d1); margin: 20px 0 8px; }
body.qecs-page--dark-top .qecs-docs-content p  { font-size: 15px; color: var(--qecs-fg-d2); margin-bottom: 14px; line-height: 1.7; }
body.qecs-page--dark-top .qecs-docs-content li { font-size: 15px; color: var(--qecs-fg-d2); }
body.qecs-page--dark-top .qecs-docs-content a  { color: var(--qecs-accent-dark); }

body.qecs-page--light-top .qecs-docs-content h2 { font-size: 22px; font-weight: 400; color: var(--qecs-fg-l1); margin: 32px 0 12px; }
body.qecs-page--light-top .qecs-docs-content h3 { font-size: 17px; font-weight: 600; color: var(--qecs-fg-l1); margin: 20px 0 8px; }
body.qecs-page--light-top .qecs-docs-content p  { font-size: 15px; color: var(--qecs-fg-l2); margin-bottom: 14px; line-height: 1.7; }
body.qecs-page--light-top .qecs-docs-content li { font-size: 15px; color: var(--qecs-fg-l2); }
body.qecs-page--light-top .qecs-docs-content a  { color: var(--qecs-accent-light); }

/* ─── Docs index cards ─── */
.qecs-docs-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  padding: 40px 24px;
  max-width: var(--qecs-container);
  margin: 0 auto;
}

.qecs-docs-card {
  background: var(--qecs-dark-surface);
  border: 1px solid var(--qecs-border-dark);
  border-radius: var(--qecs-radius-card);
  padding: 24px;
  transition: border-color 0.2s;
  text-decoration: none;
  display: block;
}
.qecs-docs-card:hover { border-color: rgba(200,168,75,0.4); }

.qecs-docs-card__icon {
  font-size: 22px;
  color: var(--qecs-accent-dark);
  margin-bottom: 12px;
}

.qecs-docs-card__title,
.qecs-section--light .qecs-docs-card__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--qecs-fg-d1);
  margin-bottom: 6px;
}

.qecs-docs-card__desc,
.qecs-section--light .qecs-docs-card__desc {
  font-size: 13px;
  color: var(--qecs-fg-d2);
  line-height: 1.5;
}

/* ─── Blog ─── */
.qecs-blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.qecs-blog-card {
  background: var(--qecs-white);
  border: 1px solid var(--qecs-border-light);
  border-radius: var(--qecs-radius-card);
  overflow: hidden;
  transition: box-shadow 0.2s;
}
.qecs-blog-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

.qecs-blog-card__img-wrap {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.qecs-blog-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s;
}
.qecs-blog-card:hover .qecs-blog-card__img {
  transform: scale(1.03);
}

.qecs-blog-card__body {
  padding: 20px;
}

.qecs-blog-card__date {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--qecs-fg-lm);
  margin-bottom: 8px;
}

.qecs-blog-card__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--qecs-fg-l1);
  margin-bottom: 8px;
  line-height: 1.3;
}

.qecs-blog-card__excerpt {
  font-size: 13px;
  color: var(--qecs-fg-l2);
  line-height: 1.55;
  margin-bottom: 14px;
}

.qecs-blog-card__link {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  color: var(--qecs-accent-light);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.qecs-blog-card__link:hover { color: var(--qecs-accent); }

/* Blog article */
.qecs-blog-article__cover {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 0;
}

.qecs-blog-article-wrap {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 56px;
  max-width: var(--qecs-container);
  margin: 0 auto;
  padding: 56px 24px;
}

.qecs-article-body {
  max-width: 720px;
}

.qecs-article-body h1 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 300;
  color: var(--qecs-fg-l1);
  margin-bottom: 12px;
  line-height: 1.2;
}

.qecs-article-meta {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 32px;
}

.qecs-article-meta__date {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--qecs-fg-lm);
}

.qecs-article-meta__tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  color: var(--qecs-accent-light);
  background: rgba(139,111,30,0.1);
  padding: 3px 10px;
  border-radius: 20px;
}

/* article body light-top scoped (S11 guard) */
body.qecs-page--light-top .qecs-article-body h2 { font-size: 22px; font-weight: 400; color: var(--qecs-fg-l1); margin: 36px 0 12px; }
body.qecs-page--light-top .qecs-article-body h3 { font-size: 18px; font-weight: 600; color: var(--qecs-fg-l1); margin: 24px 0 8px; }
body.qecs-page--light-top .qecs-article-body p  { font-size: 16px; color: var(--qecs-fg-l2); margin-bottom: 18px; line-height: 1.75; }
body.qecs-page--light-top .qecs-article-body ul,
body.qecs-page--light-top .qecs-article-body ol { padding-left: 20px; margin-bottom: 18px; }
body.qecs-page--light-top .qecs-article-body li { font-size: 16px; color: var(--qecs-fg-l2); margin-bottom: 6px; line-height: 1.6; }
body.qecs-page--light-top .qecs-article-body ul { list-style: disc; }
body.qecs-page--light-top .qecs-article-body ol { list-style: decimal; }
body.qecs-page--light-top .qecs-article-body a  { color: var(--qecs-accent-light); text-decoration: underline; }
body.qecs-page--light-top .qecs-article-body code { font-family: 'IBM Plex Mono', monospace; font-size: 13px; background: var(--qecs-light); padding: 2px 6px; border-radius: var(--qecs-radius-code); color: var(--qecs-fg-l1); }
body.qecs-page--light-top .qecs-article-body blockquote { border-left: 3px solid var(--qecs-accent); padding-left: 20px; margin: 24px 0; color: var(--qecs-fg-lm); font-style: italic; }

.qecs-blog-sidebar {
  padding-top: 8px;
}

.qecs-blog-sidebar__heading {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--qecs-fg-lm);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--qecs-border-light);
}

.qecs-blog-sidebar__list a {
  display: block;
  font-size: 13px;
  color: var(--qecs-fg-l2);
  padding: 8px 0;
  border-bottom: 1px solid var(--qecs-border-light);
  text-decoration: none;
  line-height: 1.4;
}
.qecs-blog-sidebar__list a:hover { color: var(--qecs-accent-light); }

/* ─── Contact Form ─── */
.qecs-contact-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 64px;
  align-items: start;
}

.qecs-contact-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.qecs-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.qecs-form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.qecs-form-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--qecs-fg-d2);
}

.qecs-form-input,
.qecs-form-select {
  background: var(--qecs-dark);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--qecs-radius);
  padding: 10px 14px;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 14px;
  color: var(--qecs-fg-d1);
  transition: border-color 0.15s;
  width: 100%;
  max-width: 100%;
}

.qecs-form-input:focus,
.qecs-form-select:focus {
  outline: none;
  border-color: var(--qecs-accent);
}

.qecs-form-input::placeholder { color: var(--qecs-fg-d3); }

.qecs-form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%239BA4AD' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  color-scheme: dark;
}

.qecs-form-select option {
  background: var(--qecs-dark);
  color: var(--qecs-fg-d1);
}

.qecs-form-textarea {
  min-height: 120px;
  resize: vertical;
  background: var(--qecs-dark);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--qecs-radius);
  padding: 10px 14px;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 14px;
  color: var(--qecs-fg-d1);
  transition: border-color 0.15s;
  width: 100%;
}
.qecs-form-textarea:focus {
  outline: none;
  border-color: var(--qecs-accent);
}
.qecs-form-textarea::placeholder { color: var(--qecs-fg-d3); }

.qecs-contact-info {
  border-top: 1px solid var(--qecs-border-dark);
  padding-top: 24px;
}

.qecs-contact-info__item {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  align-items: flex-start;
}

.qecs-contact-info__icon {
  color: var(--qecs-accent-dark);
  font-size: 15px;
  margin-top: 2px;
  flex-shrink: 0;
}

.qecs-contact-info__text {
  font-size: 14px;
  color: var(--qecs-fg-d2);
  line-height: 1.5;
}

.qecs-contact-info__text a {
  color: var(--qecs-accent-dark);
  text-decoration: none;
}
.qecs-contact-info__text a:hover {
  text-decoration: underline;
}

/* ─── Team ─── */
.qecs-team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.qecs-team-card {
  text-align: center;
}

.qecs-team-card__photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  display: block;
  border: 2px solid var(--qecs-border-dark);
}

.qecs-team-card__name {
  font-size: 16px;
  font-weight: 600;
  color: var(--qecs-fg-d1);
  margin-bottom: 4px;
}

.qecs-team-card__role {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--qecs-accent-dark);
  margin-bottom: 8px;
  display: block;
}

.qecs-team-card__bio {
  font-size: 13px;
  color: var(--qecs-fg-d2);
  line-height: 1.55;
}

/* ─── Values ─── */
.qecs-values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.qecs-value-item {
  padding: 24px;
  border: 1px solid var(--qecs-border-dark);
  border-radius: var(--qecs-radius-card);
  background: var(--qecs-dark-surface);
}

.qecs-value-item__num {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 32px;
  font-weight: 600;
  color: rgba(200,168,75,0.2);
  display: block;
  margin-bottom: 8px;
}

.qecs-value-item__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--qecs-fg-d1);
  margin-bottom: 8px;
}

.qecs-value-item__desc {
  font-size: 13px;
  color: var(--qecs-fg-d2);
  line-height: 1.55;
}

/* ─── Research page ─── */
.qecs-paper-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.qecs-paper-item {
  border-left: 3px solid var(--qecs-border-dark);
  padding-left: 20px;
  transition: border-color 0.15s;
}
.qecs-paper-item:hover { border-left-color: var(--qecs-accent); }

.qecs-paper-item__title {
  font-size: 15px;
  font-weight: 400;
  color: var(--qecs-fg-d1);
  margin-bottom: 4px;
}

.qecs-paper-item__authors {
  font-size: 13px;
  color: var(--qecs-fg-d3);
  margin-bottom: 4px;
  font-style: italic;
}

.qecs-paper-item__venue {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--qecs-accent-dark);
}

/* ─── Benchmarks table ─── */
.qecs-bench-table {
  width: 100%;
  border-collapse: collapse;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
}

.qecs-bench-table th {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--qecs-border-dark);
  color: var(--qecs-fg-d3);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.qecs-bench-table td {
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  color: var(--qecs-fg-d2);
  vertical-align: middle;
}

.qecs-bench-table tr:last-child td { border-bottom: none; }

.qecs-bench-table .qecs-val-amber {
  color: var(--qecs-accent-dark);
  font-weight: 600;
}

/* ─── Footer ─── */
.qecs-footer {
  background: var(--qecs-dark);
  border-top: 1px solid var(--qecs-border-dark);
  padding: 64px 0 0;
}

.qecs-footer__grid {
  max-width: var(--qecs-container);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.qecs-footer__brand .qecs-footer__logo {
  height: 28px;
  width: auto;
  margin-bottom: 14px;
}

.qecs-footer__tagline {
  font-size: 13px;
  color: var(--qecs-fg-d3);
  margin-bottom: 16px;
  line-height: 1.5;
}

.qecs-footer__contact-item {
  display: flex;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--qecs-fg-d3);
  align-items: flex-start;
}

.qecs-footer__contact-item i {
  color: var(--qecs-accent-dark);
  font-size: 12px;
  margin-top: 2px;
  flex-shrink: 0;
}

.qecs-footer__contact-item a {
  color: var(--qecs-fg-d2);
  text-decoration: none;
}
.qecs-footer__contact-item a:hover { color: var(--qecs-accent-dark); }

.qecs-footer__col-heading {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--qecs-fg-d2);
  margin-bottom: 16px;
}

.qecs-footer__links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.qecs-footer__links a {
  font-size: 13px;
  color: var(--qecs-fg-d3);
  text-decoration: none;
  transition: color 0.12s;
}
.qecs-footer__links a:hover { color: var(--qecs-fg-d1); }

.qecs-footer__bottom {
  border-top: 1px solid var(--qecs-border-dark);
}

.qecs-footer__bottom-inner {
  max-width: var(--qecs-container);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.qecs-footer__copy {
  font-size: 12px;
  color: var(--qecs-fg-d3);
  font-family: 'IBM Plex Mono', monospace;
}

.qecs-footer__legal-links {
  display: flex;
  gap: 24px;
}

.qecs-footer__legal-links a {
  font-size: 12px;
  color: var(--qecs-fg-d3);
  text-decoration: none;
  font-family: 'IBM Plex Mono', monospace;
}
.qecs-footer__legal-links a:hover { color: var(--qecs-fg-d2); }

/* ─── Legal Pages ─── */
.qecs-legal-layout {
  max-width: var(--qecs-container);
  margin: 0 auto;
  padding: calc(var(--qecs-nav-h) + 56px) 24px 80px;
}

.legal-article {
  max-width: 760px;
}

.legal-header h1 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 300;
  color: var(--qecs-fg-l1);
  margin-bottom: 8px;
}

.legal-header .legal-meta {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--qecs-fg-lm);
  margin-bottom: 4px;
}

.legal-article section {
  margin-top: 36px;
}

.legal-article h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--qecs-fg-l1);
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--qecs-border-light);
}

.legal-article h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--qecs-fg-l1);
  margin: 16px 0 6px;
}

.legal-article p {
  font-size: 14px;
  color: var(--qecs-fg-l2);
  line-height: 1.7;
  margin-bottom: 12px;
}

.legal-article ul, .legal-article ol {
  padding-left: 20px;
  margin-bottom: 12px;
  list-style: disc;
}

.legal-article li {
  font-size: 14px;
  color: var(--qecs-fg-l2);
  margin-bottom: 6px;
  line-height: 1.6;
}

.legal-article a {
  color: var(--qecs-accent-light);
  text-decoration: underline;
}

.legal-article address {
  font-style: normal;
  font-size: 14px;
  color: var(--qecs-fg-l2);
  line-height: 1.7;
}

.legal-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-bottom: 16px;
}

.legal-table th {
  text-align: left;
  padding: 8px 12px;
  background: var(--qecs-light);
  color: var(--qecs-fg-l1);
  font-weight: 600;
  border: 1px solid var(--qecs-border-light);
}

.legal-table td {
  padding: 8px 12px;
  border: 1px solid var(--qecs-border-light);
  color: var(--qecs-fg-l2);
  vertical-align: top;
}

/* ─── Cookie Banner ─── */
.cookie-banner,
.cookie-banner--notice,
.cookie-banner--prior-consent {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 9999;
  background: var(--qecs-dark-alt);
  border-top: 1px solid var(--qecs-border-dark);
}

.cookie-banner__inner {
  max-width: var(--qecs-container);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.cookie-banner__text {
  font-size: 13px;
  color: var(--qecs-fg-d2);
  flex: 1;
  min-width: 200px;
}

.cookie-banner__text a {
  color: var(--qecs-accent-dark);
  text-decoration: underline;
}

.cookie-banner__actions {
  flex-shrink: 0;
}

.cookie-banner__btn {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  font-weight: 500;
  padding: 8px 18px;
  border-radius: var(--qecs-radius);
  border: 1.5px solid var(--qecs-accent);
  background: transparent;
  color: var(--qecs-accent-dark);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.cookie-banner__btn--primary:hover {
  background: var(--qecs-accent);
  color: var(--qecs-dark);
}

/* ─── Misc Utility ─── */
.qecs-separator {
  height: 1px;
  background: var(--qecs-border-dark);
  margin: 0;
}

.qecs-text-amber { color: var(--qecs-accent-dark); }
.qecs-text-muted { color: var(--qecs-fg-d2); }
.qecs-text-mono  { font-family: 'IBM Plex Mono', monospace; }

.qecs-badge {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid;
}

.qecs-section--dark .qecs-badge,
.qecs-section--dark-alt .qecs-badge {
  color: var(--qecs-accent-dark);
  border-color: rgba(200,168,75,0.3);
  background: rgba(200,168,75,0.07);
}

.qecs-section--light .qecs-badge,
.qecs-section--white .qecs-badge {
  color: var(--qecs-accent-light);
  border-color: rgba(139,111,30,0.3);
  background: rgba(139,111,30,0.07);
}

/* Fade-in animation */
.qecs-fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.qecs-fade-in.is-visible {
  opacity: 1;
  transform: none;
}

/* Failsafe: reveal after 1.2s */
@keyframes qecs-failsafe-reveal {
  to { opacity: 1; transform: none; }
}

/* Community channels */
.qecs-community-channels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.qecs-channel-card {
  background: var(--qecs-dark-surface);
  border: 1px solid var(--qecs-border-dark);
  border-radius: var(--qecs-radius-card);
  padding: 28px;
}

.qecs-channel-card__icon {
  font-size: 24px;
  color: var(--qecs-accent-dark);
  margin-bottom: 14px;
}

.qecs-channel-card__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--qecs-fg-d1);
  margin-bottom: 8px;
}

.qecs-channel-card__desc {
  font-size: 13px;
  color: var(--qecs-fg-d2);
  line-height: 1.55;
}

.qecs-channel-card__link {
  margin-top: 14px;
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--qecs-accent-dark);
  text-decoration: none;
}
.qecs-channel-card__link:hover { text-decoration: underline; }

/* ─── Responsive ─── */
@media (max-width: 1024px) {
  .qecs-metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .qecs-research-signal { grid-template-columns: 1fr; }
  .qecs-contact-grid { grid-template-columns: 1fr; }
  .qecs-blog-article-wrap { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .qecs-hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .qecs-hero__visual { display: none; }
  .qecs-card-grid { grid-template-columns: repeat(2, 1fr); }
  .qecs-value-grid { grid-template-columns: repeat(2, 1fr); }
  .qecs-team-grid { grid-template-columns: repeat(2, 1fr); }
  .qecs-docs-layout { grid-template-columns: 1fr; }
  .qecs-docs-sidebar { position: static; max-height: none; }
  .qecs-docs-main { padding: 32px 24px; }
  .qecs-blog-grid { grid-template-columns: repeat(2, 1fr); }
  .qecs-footer__grid { grid-template-columns: 1fr 1fr; }
  .qecs-two-col { grid-template-columns: 1fr; }
  .qecs-docs-card-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  :root {
    --qecs-section-py: 64px;
  }

  .qecs-nav__links,
  .qecs-nav__cta { display: none; }

  .qecs-nav__hamburger { display: flex; }

  .qecs-hero__inner { padding: 60px 24px; }
  .qecs-subhero__inner { padding: 60px 24px 52px; }

  .qecs-process { grid-template-columns: 1fr; gap: 32px; }
  .qecs-process::before { display: none; }

  .qecs-card-grid { grid-template-columns: 1fr; }
  .qecs-value-grid { grid-template-columns: 1fr; }
  .qecs-team-grid { grid-template-columns: 1fr; }
  .qecs-blog-grid { grid-template-columns: 1fr; }
  .qecs-metrics-grid { grid-template-columns: 1fr 1fr; }
  .qecs-values-grid { grid-template-columns: 1fr; }
  .qecs-cta-band { grid-template-columns: 1fr; }
  .qecs-cta-band__right { border-left: none; padding-left: 0; border-top: 1px solid var(--qecs-border-dark); padding-top: 24px; }
  .qecs-footer__grid { grid-template-columns: 1fr; }
  .qecs-community-channels { grid-template-columns: 1fr; }
  .qecs-form-row { grid-template-columns: 1fr; }
  .qecs-footer__bottom-inner { flex-direction: column; align-items: flex-start; }
}

/* ─── Legal: container + main (used by legal pages) ─── */
.qecs-legal-main {
  padding-top: var(--qecs-nav-h);
  background: var(--qecs-light);
  min-height: calc(100vh - var(--qecs-nav-h));
}

.qecs-legal-container {
  max-width: var(--qecs-container);
  margin: 0 auto;
  padding: 56px 24px 96px;
}

/* ─── Section variants ─── */
.qecs-section--light-alt {
  background: var(--qecs-cream);
}
.qecs-section--light-alt h1,
.qecs-section--light-alt h2,
.qecs-section--light-alt h3,
.qecs-section--light-alt h4,
.qecs-section--light-alt p,
.qecs-section--light-alt li { color: var(--qecs-fg-l1); }

.qecs-section__label--on-light { color: var(--qecs-accent-light); }
.qecs-section__heading--on-light { color: var(--qecs-fg-l1); }

/* ─── Hero eyebrow ─── */
.qecs-hero__eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--qecs-accent-dark);
  display: block;
  margin-bottom: 14px;
}

/* ─── Subhero wide variant ─── */
.qecs-subhero--wide .qecs-subhero__inner {
  max-width: 100%;
}

/* ─── Blog Hero ─── */
.qecs-blog-hero {
  background: var(--qecs-dark);
  padding-top: var(--qecs-nav-h);
}
.qecs-blog-hero__inner {
  max-width: var(--qecs-container);
  margin: 0 auto;
  padding: 64px 24px 56px;
}
.qecs-blog-hero__title {
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 300;
  color: var(--qecs-fg-d1);
  margin-bottom: 12px;
}
.qecs-blog-hero__sub {
  font-size: 16px;
  color: var(--qecs-fg-d2);
  max-width: 560px;
  line-height: 1.6;
}

/* ─── Blog Card extras ─── */
.qecs-blog-card__tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--qecs-accent-light);
  background: rgba(139,111,30,0.1);
  padding: 2px 8px;
  border-radius: 20px;
  display: inline-block;
  margin-bottom: 4px;
}
.qecs-blog-card__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.qecs-blog-card__img-link {
  display: block;
  overflow: hidden;
}

/* ─── Blog card img-wrap height override (overrides aspect-ratio above) ─── */
.qecs-blog-card__img-wrap {
  height: 200px;
  aspect-ratio: unset;
}

/* ─── Button: ghost on light background ─── */
.qecs-btn--ghost-dark-on-light {
  background: transparent;
  color: var(--qecs-fg-l1);
  border-color: rgba(24,28,32,0.3);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 10px 22px;
  border-radius: var(--qecs-radius);
  border: 1.5px solid rgba(24,28,32,0.3);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  transition: border-color 0.15s, background 0.15s;
  cursor: pointer;
}
.qecs-btn--ghost-dark-on-light:hover {
  border-color: var(--qecs-fg-l1);
  background: rgba(24,28,32,0.04);
}

/* Submit button variant */
.qecs-btn--submit {
  background: var(--qecs-accent);
  color: var(--qecs-dark);
  border-color: var(--qecs-accent);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 12px 28px;
  border-radius: var(--qecs-radius);
  border: 1.5px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  transition: background 0.18s, border-color 0.18s;
  cursor: pointer;
  width: 100%;
  justify-content: center;
}
.qecs-btn--submit:hover {
  background: var(--qecs-accent-dark);
  border-color: var(--qecs-accent-dark);
}

/* ─── Article component ─── */
.qecs-article {
  background: var(--qecs-white);
  min-height: calc(100vh - var(--qecs-nav-h));
}

.qecs-article__header {
  background: var(--qecs-dark);
  padding-top: var(--qecs-nav-h);
}

.qecs-article__header-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 24px 48px;
}

.qecs-article__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.qecs-article__meta .qecs-blog-card__tag {
  color: var(--qecs-accent-dark);
  background: rgba(200,168,75,0.12);
}

.qecs-article__meta .qecs-blog-card__date {
  color: var(--qecs-fg-d2);
}

.qecs-article__author {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--qecs-fg-d3);
}

.qecs-article__title {
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 300;
  color: var(--qecs-fg-d1);
  margin-bottom: 16px;
  line-height: 1.2;
}

.qecs-article__lede {
  font-size: 16px;
  color: var(--qecs-fg-d2);
  line-height: 1.6;
  max-width: 620px;
}

.qecs-article__cover-figure {
  margin: 0;
}

.qecs-article__cover {
  width: 100%;
  height: auto;
  display: block;
  max-height: 480px;
  object-fit: cover;
}

.qecs-article__body {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px;
}

.qecs-article__footer {
  background: var(--qecs-light);
  padding: 40px 0;
}

.qecs-article__footer-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  flex-wrap: wrap;
}

.qecs-article__related {
  text-align: right;
}

.qecs-article__related-heading {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--qecs-fg-lm);
  margin-bottom: 10px;
}

.qecs-article__related-link {
  display: block;
  font-size: 13px;
  color: var(--qecs-accent-light);
  text-decoration: none;
  margin-bottom: 6px;
  transition: color 0.12s;
}
.qecs-article__related-link:hover { color: var(--qecs-accent); }

/* ─── Docs: breadcrumb, sidenav, callout ─── */
.qecs-docs-breadcrumb {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--qecs-fg-d3);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 4px;
}
.qecs-docs-breadcrumb a {
  color: var(--qecs-fg-d3);
  text-decoration: none;
  transition: color 0.12s;
}
.qecs-docs-breadcrumb a:hover { color: var(--qecs-accent-dark); }

/* On light-top pages, breadcrumb in docs uses light colors */
body.qecs-page--light-top .qecs-docs-breadcrumb {
  color: var(--qecs-fg-lm);
}
body.qecs-page--light-top .qecs-docs-breadcrumb a {
  color: var(--qecs-fg-lm);
}
body.qecs-page--light-top .qecs-docs-breadcrumb a:hover {
  color: var(--qecs-accent-light);
}

.qecs-docs-sidenav {
  padding: 0;
}

.qecs-docs-sidenav__section {
  margin-bottom: 28px;
}

.qecs-docs-sidenav__label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--qecs-accent-light);
  display: block;
  padding: 0 20px;
  margin-bottom: 6px;
}

.qecs-docs-sidenav__link {
  display: block;
  font-size: 13px;
  color: var(--qecs-fg-lm);
  padding: 5px 20px;
  text-decoration: none;
  transition: color 0.12s, background 0.12s;
  border-radius: 0;
}
.qecs-docs-sidenav__link:hover {
  color: var(--qecs-fg-l1);
  background: rgba(24,28,32,0.06);
}
.qecs-docs-sidenav__link--active {
  color: var(--qecs-fg-l1);
  background: rgba(24,28,32,0.07);
  font-weight: 600;
}

.qecs-docs-callout {
  background: rgba(139,111,30,0.08);
  border-left: 3px solid var(--qecs-accent);
  border-radius: 0 var(--qecs-radius) var(--qecs-radius) 0;
  padding: 14px 18px;
  margin: 20px 0;
}
.qecs-docs-callout p {
  font-size: 14px !important;
  color: var(--qecs-fg-l2) !important;
  margin: 0 !important;
}
body.qecs-page--light-top .qecs-docs-callout p {
  color: var(--qecs-fg-l2);
}

/* Docs content: content header, section, title, lead */
.qecs-docs-content__header {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--qecs-border-light);
}

.qecs-docs-content__title {
  font-size: 28px;
  font-weight: 300;
  color: var(--qecs-fg-l1);
  margin-bottom: 8px;
}

.qecs-docs-content__lead {
  font-size: 15px;
  color: var(--qecs-fg-l2);
  line-height: 1.65;
  max-width: 600px;
}

.qecs-docs-content__section {
  margin-top: 36px;
}

/* Docs index grid */
.qecs-docs-index-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 680px;
  margin-top: 24px;
}

/* Docs card link  */
.qecs-docs-card__link {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  font-weight: 500;
  color: var(--qecs-accent-dark);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 10px;
  transition: gap 0.15s;
}
.qecs-docs-card__link:hover { gap: 8px; }

/* Code block docs variant (lighter background) */
.qecs-code-block--docs {
  margin: 16px 0;
}
body.qecs-page--light-top .qecs-code-block--docs {
  border-color: rgba(0,0,0,0.08);
}

/* ─── API Method component ─── */
.qecs-api-method {
  border: 1px solid var(--qecs-border-light);
  border-radius: var(--qecs-radius-card);
  margin-bottom: 24px;
  overflow: hidden;
}

.qecs-api-method__sig {
  background: var(--qecs-dark);
  padding: 12px 20px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  color: var(--qecs-fg-d1);
  display: flex;
  align-items: center;
  gap: 12px;
}

.qecs-api-method__params {
  padding: 16px 20px;
  background: var(--qecs-white);
}

.qecs-api-param {
  display: grid;
  grid-template-columns: 140px 80px 1fr;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--qecs-border-light);
  align-items: baseline;
}
.qecs-api-param:last-child { border-bottom: none; }

.qecs-api-param__name {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  color: var(--qecs-fg-l1);
  font-weight: 500;
}

.qecs-api-param__type {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--qecs-accent-light);
}

.qecs-api-param__desc {
  font-size: 13px;
  color: var(--qecs-fg-l2);
  line-height: 1.5;
}

/* ─── Research list ─── */
.qecs-research-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.qecs-research-item {
  border-left: 3px solid var(--qecs-border-dark);
  padding: 0 0 0 20px;
  transition: border-color 0.15s;
}
.qecs-research-item:hover { border-left-color: var(--qecs-accent); }

.qecs-research-item__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.qecs-research-item__date {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--qecs-fg-d3);
}

.qecs-research-item__tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--qecs-accent-dark);
  background: rgba(200,168,75,0.1);
  padding: 2px 8px;
  border-radius: 20px;
}

.qecs-research-item__title {
  font-size: 16px;
  font-weight: 400;
  color: var(--qecs-fg-d1);
  margin-bottom: 6px;
  line-height: 1.35;
}

.qecs-research-item__authors {
  font-size: 13px;
  color: var(--qecs-fg-d3);
  font-style: italic;
  margin-bottom: 8px;
}

.qecs-research-item__abstract {
  font-size: 14px;
  color: var(--qecs-fg-d2);
  line-height: 1.6;
  margin-bottom: 10px;
}

.qecs-research-item__link {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--qecs-accent-dark);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.qecs-research-item__link:hover { text-decoration: underline; }

/* ─── Reference list (theoretical foundations) ─── */
.qecs-reference-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.qecs-reference-item {
  padding: 12px 16px;
  border: 1px solid var(--qecs-border-dark);
  border-radius: var(--qecs-radius);
  background: var(--qecs-dark-surface);
}

.qecs-reference-item__title {
  font-size: 14px;
  font-weight: 400;
  color: var(--qecs-fg-d1);
  margin-bottom: 4px;
  line-height: 1.35;
}

.qecs-reference-item__authors {
  font-size: 12px;
  color: var(--qecs-fg-d3);
  font-style: italic;
  margin-bottom: 4px;
}

.qecs-reference-item__year {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--qecs-fg-d3);
  margin-bottom: 2px;
}

.qecs-reference-item__venue {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--qecs-accent-dark);
}

/* ─── Hardware Arch Cards ─── */
.qecs-arch-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.qecs-arch-card {
  background: var(--qecs-dark-surface);
  border: 1px solid var(--qecs-border-dark);
  border-radius: var(--qecs-radius-card);
  padding: 24px;
  position: relative;
}

.qecs-arch-card__icon {
  font-size: 28px;
  color: var(--qecs-accent-dark);
  margin-bottom: 14px;
}

.qecs-arch-card__name {
  font-size: 16px;
  font-weight: 600;
  color: var(--qecs-fg-d1);
  margin-bottom: 6px;
}

.qecs-arch-card__desc {
  font-size: 13px;
  color: var(--qecs-fg-d2);
  line-height: 1.55;
  margin-bottom: 14px;
}

.qecs-arch-card__tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--qecs-green);
  background: rgba(77,184,139,0.1);
  padding: 3px 10px;
  border-radius: 20px;
  display: inline-block;
}

.qecs-arch-card__tag--dev {
  color: var(--qecs-fg-d3);
  background: rgba(107,117,128,0.12);
}

/* ─── Community / contact ─── */
.qecs-community-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.qecs-community-card {
  background: var(--qecs-dark-surface);
  border: 1px solid var(--qecs-border-dark);
  border-radius: var(--qecs-radius-card);
  padding: 28px;
}

.qecs-community-card__icon {
  font-size: 28px;
  color: var(--qecs-accent-dark);
  margin-bottom: 16px;
}

.qecs-community-card__title {
  font-size: 18px;
  font-weight: 600;
  color: var(--qecs-fg-d1);
  margin-bottom: 10px;
}

.qecs-community-card__desc {
  font-size: 14px;
  color: var(--qecs-fg-d2);
  line-height: 1.55;
  margin-bottom: 18px;
}

/* ─── Contact layout ─── */
.qecs-contact-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 64px;
  align-items: start;
}

.qecs-contact-form-wrap {
  width: 100%;
}

.qecs-contact-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 18px;
}

.qecs-contact-form__field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 18px;
}

.qecs-contact-form__label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--qecs-fg-d2);
}

.qecs-contact-form__input,
.qecs-contact-form__select {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--qecs-radius);
  padding: 10px 14px;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 14px;
  color: var(--qecs-fg-d1);
  transition: border-color 0.15s;
  width: 100%;
}
.qecs-contact-form__input:focus,
.qecs-contact-form__select:focus {
  outline: none;
  border-color: var(--qecs-accent);
}
.qecs-contact-form__input::placeholder { color: var(--qecs-fg-d3); }

.qecs-contact-form__select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%239BA4AD' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  color-scheme: dark;
}
.qecs-contact-form__select option {
  background: var(--qecs-dark);
  color: var(--qecs-fg-d1);
}

.qecs-contact-form__textarea {
  min-height: 120px;
  resize: vertical;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--qecs-radius);
  padding: 10px 14px;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 14px;
  color: var(--qecs-fg-d1);
  transition: border-color 0.15s;
  width: 100%;
}
.qecs-contact-form__textarea:focus {
  outline: none;
  border-color: var(--qecs-accent);
}
.qecs-contact-form__textarea::placeholder { color: var(--qecs-fg-d3); }

.qecs-contact-info__heading {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--qecs-accent-dark);
  margin-bottom: 20px;
  display: block;
}

.qecs-contact-info__label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--qecs-fg-d3);
  display: block;
  margin-bottom: 4px;
}

.qecs-contact-info__value {
  font-size: 14px;
  color: var(--qecs-fg-d2);
}
.qecs-contact-info__value a {
  color: var(--qecs-accent-dark);
  text-decoration: none;
}
.qecs-contact-info__value a:hover { text-decoration: underline; }

.qecs-contact-info__address {
  font-style: normal;
  font-size: 14px;
  color: var(--qecs-fg-d2);
  line-height: 1.6;
}

.qecs-contact-info__note {
  font-size: 12px;
  color: var(--qecs-fg-d3);
  line-height: 1.5;
  margin-top: 6px;
}

/* tt-cmd (terminal command text) */
.qecs-code-block .qecs-tt-cmd {
  color: var(--qecs-fg-d1);
}

/* ─── Responsive additions for new components ─── */
@media (max-width: 900px) {
  .qecs-arch-cards { grid-template-columns: 1fr; }
  .qecs-community-grid { grid-template-columns: 1fr; }
  .qecs-contact-layout { grid-template-columns: 1fr; }
  .qecs-api-param { grid-template-columns: 1fr 1fr; }
  .qecs-docs-index-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .qecs-contact-form__row { grid-template-columns: 1fr; }
  .qecs-article__footer-inner { flex-direction: column; align-items: flex-start; }
  .qecs-article__related { text-align: left; }
  .qecs-blog-hero { padding-top: var(--qecs-nav-h); }
}