/* ============================================================
   CANsole — Brand Stylesheet
   Palette derived from the wordmark:
     - dark slate "CAN"     → --cs-ink
     - lighter gray "sole"  → --cs-stone
     - red triangle accent  → --cs-accent
   ============================================================ */

:root {
  --cs-ink:        #1f2937;     /* CAN letters */
  --cs-ink-strong: #0f172a;     /* near-black */
  --cs-stone:      #6b7280;     /* "sole" letters / body secondary */
  --cs-stone-soft: #9ca3af;
  --cs-paper:      #ffffff;
  --cs-paper-soft: #f9fafb;
  --cs-paper-edge: #f3f4f6;
  --cs-line:       #e5e7eb;
  --cs-line-soft:  #eef0f3;
  --cs-accent:     #dc2626;     /* the red triangle */
  --cs-accent-dk:  #b91c1c;
  --cs-accent-soft:#fef2f2;
  --cs-amber:      #d97706;
  --cs-emerald:    #059669;
  --cs-violet:     #7c3aed;
  --cs-azure:      #2563eb;

  --cs-shadow:     0 1px 3px rgba(15, 23, 42, 0.06), 0 8px 28px rgba(15, 23, 42, 0.08);
  --cs-shadow-lg:  0 4px 12px rgba(15, 23, 42, 0.08), 0 20px 60px rgba(15, 23, 42, 0.14);

  --cs-radius:     12px;
  --cs-radius-sm:  8px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scrollbar-gutter: stable; }

body {
  margin: 0;
  background: var(--cs-paper);
  color: var(--cs-ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--cs-accent); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: var(--cs-accent-dk); }

code, pre, kbd { font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
code { background: var(--cs-paper-edge); padding: 2px 6px; border-radius: 4px; font-size: 0.88em; color: var(--cs-ink-strong); }
pre code { background: transparent; padding: 0; }

/* -- Header -- */

.cs-header {
  background: var(--cs-paper);
  border-bottom: 1px solid var(--cs-line);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  background-color: rgba(255,255,255,0.85);
}

.cs-header-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.cs-brand { display: inline-flex; align-items: center; }
.cs-logo { height: 38px; width: auto; display: block; }

.cs-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 4px;
}

.cs-nav li a {
  display: inline-block;
  padding: 8px 14px;
  color: var(--cs-stone);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  border-radius: 8px;
  transition: color 0.15s, background 0.15s;
}

.cs-nav li a:hover { color: var(--cs-ink); background: var(--cs-paper-edge); }
.cs-nav li.active a { color: var(--cs-accent); background: var(--cs-accent-soft); }

/* -- Main / page container -- */

.cs-main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px 4rem;
}

/* -- Footer -- */

.cs-footer {
  border-top: 1px solid var(--cs-line);
  background: var(--cs-paper-soft);
  margin-top: 4rem;
}

.cs-footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 2rem 28px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--cs-stone);
}

.cs-footer-brand strong {
  color: var(--cs-ink);
  font-weight: 800;
  letter-spacing: 0.02em;
  display: block;
}
.cs-footer-brand span { font-size: 0.75rem; }

.cs-footer-links { text-align: center; display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.cs-footer-links a { color: var(--cs-stone); }
.cs-footer-links a:hover { color: var(--cs-ink); }

.cs-footer-meta { text-align: right; display: flex; gap: 1rem; justify-content: flex-end; flex-wrap: wrap; align-items: center; }
.cs-footer-meta a { color: var(--cs-stone); }
.cs-footer-meta a:hover { color: var(--cs-ink); }

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

.cs-hero {
  position: relative;
  text-align: center;
  padding: 5rem 1rem 3rem;
  overflow: hidden;
}

.cs-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(800px 400px at 50% -100px, rgba(220, 38, 38, 0.06), transparent 70%),
    radial-gradient(600px 300px at 80% 100%, rgba(31, 41, 55, 0.04), transparent 70%);
  pointer-events: none;
  z-index: -1;
}

.cs-hero .cs-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--cs-accent);
  background: var(--cs-accent-soft);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 1.5rem;
}

.cs-hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.05;
  margin: 0 0 1rem;
  color: var(--cs-ink-strong);
  letter-spacing: -0.02em;
}

.cs-hero h1 .cs-mark {
  background: linear-gradient(180deg, var(--cs-ink) 60%, var(--cs-accent) 60%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.cs-hero .cs-tagline {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--cs-stone);
  max-width: 680px;
  margin: 0 auto 1rem;
  line-height: 1.6;
}

.cs-hero .cs-sub {
  font-size: 1rem;
  color: var(--cs-stone);
  max-width: 720px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.cs-hero-logo {
  max-width: 560px;
  width: 80%;
  margin: 0 auto 2rem;
  display: block;
}

.cs-product-shot {
  display: block;
  max-width: 720px;
  width: 100%;
  height: auto;
  margin: 1rem auto 2.5rem;
}

/* ============================================================
   Family hero — three products communicating
   ============================================================ */

.cs-family-hero {
  display: flex;
  align-items: stretch;
  justify-content: center;
  max-width: 1100px;
  margin: 1.5rem auto 2.5rem;
  gap: 0;
}

.cs-family-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  margin: 0;
  flex: 0 0 auto;
  text-align: center;
}

.cs-family-frame {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--cs-paper-soft), var(--cs-paper-edge));
  border: 1px solid var(--cs-line);
  border-radius: 14px;
  padding: 0.7rem 1rem;
  box-shadow: var(--cs-shadow);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.cs-family-item a:hover .cs-family-frame {
  transform: translateY(-3px);
  box-shadow: var(--cs-shadow-lg);
  border-color: var(--cs-stone-soft);
}

.cs-family-frame img {
  height: 100%;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  display: block;
}

.cs-family-frame.is-ecuconnect {
  background: radial-gradient(circle at 50% 50%, #1f2937 0%, #0f172a 100%);
  border-color: var(--cs-ink);
  padding: 0.5rem;
}

.cs-family-frame.is-studio img {
  border-radius: 4px;
}

.cs-family-item figcaption,
.cs-family-item .cs-family-cap {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cs-stone);
  transition: color 0.2s;
}

.cs-family-item a {
  color: inherit;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
}

.cs-family-item a:hover .cs-family-cap { color: var(--cs-accent); }

.cs-family-link {
  flex: 1 1 0;
  min-width: 40px;
  align-self: center;
  height: 2px;
  background: linear-gradient(90deg, var(--cs-line), var(--cs-accent) 30%, var(--cs-accent) 70%, var(--cs-line));
  position: relative;
  margin: 0 0.4rem;
  align-self: center;
}

.cs-family-link::before,
.cs-family-link::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cs-accent);
  transform: translate(-50%, -50%);
  box-shadow: 0 0 10px rgba(220, 38, 38, 0.7);
}

.cs-family-link::before {
  animation: cs-flow 3s linear infinite;
}

.cs-family-link::after {
  animation: cs-flow 3s linear infinite;
  animation-direction: reverse;
  animation-delay: 1.5s;
}

@keyframes cs-flow {
  0%   { left: 0%;   opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 1; }
  100% { left: 100%; opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .cs-family-link::before,
  .cs-family-link::after { animation: none; left: 50%; opacity: 1; }
}

@media (max-width: 760px) {
  .cs-family-hero {
    flex-direction: column;
    gap: 0;
    align-items: center;
  }
  .cs-family-frame { height: 160px; }
  .cs-family-link {
    width: 2px;
    height: 36px;
    background: linear-gradient(180deg, var(--cs-line), var(--cs-accent), var(--cs-line));
    margin: 0.4rem 0;
    flex: 0 0 auto;
  }
  @keyframes cs-flow {
    0%   { top: 0%;   left: 50%; opacity: 0; }
    10%  { opacity: 1; }
    90%  { opacity: 1; }
    100% { top: 100%; left: 50%; opacity: 0; }
  }
}

.cs-product-shot.is-compact {
  max-width: 380px;
}

.cs-product-shot.is-screenshot {
  border-radius: var(--cs-radius);
  box-shadow: var(--cs-shadow-lg);
  border: 1px solid var(--cs-line);
  cursor: zoom-in;
  transition: transform 0.2s, box-shadow 0.2s;
}

.cs-product-shot.is-screenshot:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.12), 0 32px 80px rgba(15, 23, 42, 0.18);
}

/* ============================================================
   Lightbox (click-to-zoom screenshots)
   ============================================================ */

.cs-lightbox {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.92);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  cursor: zoom-out;
  opacity: 0;
  transition: opacity 0.18s ease;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.cs-lightbox.is-open { opacity: 1; }

.cs-lightbox img {
  max-width: 100%;
  max-height: 100%;
  border-radius: var(--cs-radius);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
  transform: scale(0.96);
  transition: transform 0.18s ease;
}

.cs-lightbox.is-open img { transform: scale(1); }

.cs-lightbox-close {
  position: fixed;
  top: 1.2rem;
  right: 1.4rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.18);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.15s, border-color 0.15s;
}

.cs-lightbox-close:hover {
  background: rgba(255, 255, 255, 0.22);
  border-color: rgba(255, 255, 255, 0.35);
}

body.cs-lightbox-open { overflow: hidden; }

.cs-cta-row {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.cs-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--cs-radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s, background 0.15s, border-color 0.15s, color 0.15s;
}

.cs-btn-primary {
  background: var(--cs-ink);
  color: var(--cs-paper);
}
.cs-btn-primary:hover { background: var(--cs-ink-strong); color: var(--cs-paper); transform: translateY(-1px); }

.cs-btn-accent {
  background: var(--cs-accent);
  color: var(--cs-paper);
}
.cs-btn-accent:hover { background: var(--cs-accent-dk); color: var(--cs-paper); transform: translateY(-1px); }

.cs-btn-ghost {
  background: var(--cs-paper);
  color: var(--cs-ink);
  border-color: var(--cs-line);
}
.cs-btn-ghost:hover { border-color: var(--cs-ink); color: var(--cs-ink); transform: translateY(-1px); }

/* ============================================================
   Stats bar
   ============================================================ */

.cs-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--cs-line);
  border-bottom: 1px solid var(--cs-line);
  margin: 3rem 0;
}

.cs-stat {
  text-align: center;
  padding: 1.5rem 1rem;
  border-right: 1px solid var(--cs-line);
}
.cs-stat:last-child { border-right: none; }

.cs-stat-num {
  font-size: 1.9rem;
  font-weight: 900;
  color: var(--cs-ink-strong);
  line-height: 1;
}
.cs-stat-num em { font-style: normal; color: var(--cs-accent); }

.cs-stat-label {
  font-size: 0.72rem;
  color: var(--cs-stone);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-top: 0.5rem;
  font-weight: 600;
}

/* ============================================================
   Section primitives
   ============================================================ */

.cs-section {
  padding: 4rem 0;
  border-top: 1px solid var(--cs-line-soft);
}

.cs-section:first-of-type { border-top: none; }

.cs-eyebrow-line {
  display: block;
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--cs-accent);
  margin-bottom: 0.6rem;
  text-align: center;
}

.cs-section-title {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--cs-ink-strong);
  margin: 0 auto 0.8rem;
  text-align: center;
  letter-spacing: -0.015em;
  max-width: 820px;
  line-height: 1.2;
}

.cs-section-desc {
  font-size: 1.05rem;
  color: var(--cs-stone);
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3rem;
  line-height: 1.7;
}

/* ============================================================
   Feature grid
   ============================================================ */

.cs-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.cs-features.cs-features-2 { grid-template-columns: repeat(2, 1fr); }

.cs-feature {
  padding: 1.75rem;
  background: var(--cs-paper);
  border: 1px solid var(--cs-line);
  border-radius: var(--cs-radius);
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
}

.cs-feature:hover {
  transform: translateY(-2px);
  box-shadow: var(--cs-shadow);
  border-color: var(--cs-stone-soft);
}

.cs-feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  margin-bottom: 1rem;
}
.cs-feature-icon.red    { background: var(--cs-accent-soft); color: var(--cs-accent); }
.cs-feature-icon.azure  { background: #eff6ff; color: var(--cs-azure); }
.cs-feature-icon.emerald{ background: #ecfdf5; color: var(--cs-emerald); }
.cs-feature-icon.amber  { background: #fffbeb; color: var(--cs-amber); }
.cs-feature-icon.violet { background: #f5f3ff; color: var(--cs-violet); }
.cs-feature-icon.slate  { background: var(--cs-paper-edge); color: var(--cs-ink); }

.cs-feature h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--cs-ink-strong);
  margin: 0 0 0.5rem;
}

.cs-feature p {
  font-size: 0.92rem;
  color: var(--cs-stone);
  line-height: 1.6;
  margin: 0;
}

/* ============================================================
   Product cards (Studio / Touch / ECUconnect)
   ============================================================ */

.cs-products {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2rem 0;
}

.cs-product {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--cs-paper);
  border: 1px solid var(--cs-line);
  border-radius: var(--cs-radius);
  padding: 2rem;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.cs-product::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--cs-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.cs-product:hover {
  transform: translateY(-4px);
  box-shadow: var(--cs-shadow-lg);
  border-color: var(--cs-ink);
}

.cs-product:hover::before { transform: scaleX(1); }

.cs-product-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--cs-stone);
  margin-bottom: 0.6rem;
}

.cs-product-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--cs-ink);
  color: var(--cs-paper);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.2rem;
}

.cs-product h3 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--cs-ink-strong);
  margin: 0 0 0.6rem;
  letter-spacing: -0.01em;
}

.cs-product p {
  color: var(--cs-stone);
  line-height: 1.65;
  margin: 0 0 1.2rem;
  flex-grow: 1;
}

.cs-product ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
}

.cs-product li {
  position: relative;
  padding: 0.2rem 0 0.2rem 1.4rem;
  font-size: 0.9rem;
  color: var(--cs-stone);
  line-height: 1.5;
}

.cs-product li::before {
  content: '\f0da';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  left: 0;
  top: 0.25rem;
  color: var(--cs-accent);
  font-size: 0.75rem;
}

.cs-product-cta {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  color: var(--cs-ink);
  font-size: 0.95rem;
}

.cs-product-cta i { transition: transform 0.2s; }
.cs-product:hover .cs-product-cta i { transform: translateX(4px); }
.cs-product:hover .cs-product-cta { color: var(--cs-accent); }

/* ============================================================
   Showcase (image / text split)
   ============================================================ */

.cs-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  margin: 3rem 0;
}

.cs-showcase.reverse { direction: rtl; }
.cs-showcase.reverse > * { direction: ltr; }

.cs-showcase-body h3 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--cs-ink-strong);
  margin: 0 0 0.7rem;
  letter-spacing: -0.01em;
}

.cs-showcase-body p {
  color: var(--cs-stone);
  line-height: 1.7;
}

.cs-showcase-body ul {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}

.cs-showcase-body li {
  position: relative;
  padding: 0.3rem 0 0.3rem 1.6rem;
  color: var(--cs-stone);
  font-size: 0.95rem;
  line-height: 1.55;
}

.cs-showcase-body li::before {
  content: '\f00c';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  left: 0;
  top: 0.5rem;
  color: var(--cs-emerald);
  font-size: 0.85rem;
}

.cs-showcase-visual {
  background: linear-gradient(135deg, var(--cs-paper-soft), var(--cs-paper-edge));
  border: 1px solid var(--cs-line);
  border-radius: var(--cs-radius);
  aspect-ratio: 16/10;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: var(--cs-stone-soft);
  position: relative;
  overflow: hidden;
}

.cs-showcase-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(400px 200px at 80% 20%, rgba(220, 38, 38, 0.08), transparent 70%),
    radial-gradient(400px 200px at 20% 80%, rgba(31, 41, 55, 0.06), transparent 70%);
  pointer-events: none;
}

/* ============================================================
   Capability tags (protocol / hardware lists)
   ============================================================ */

.cs-tag-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin: 2rem 0;
}

.cs-tag-group h4 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--cs-stone);
  font-weight: 700;
  margin: 0 0 1rem;
}

.cs-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.cs-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--cs-paper);
  border: 1px solid var(--cs-line);
  font-size: 0.82rem;
  color: var(--cs-ink);
  font-weight: 500;
}

.cs-tag.is-pending {
  color: var(--cs-stone);
  border-style: dashed;
}

.cs-tag.is-accent {
  background: var(--cs-ink);
  color: var(--cs-paper);
  border-color: var(--cs-ink);
}

/* ============================================================
   Architecture diagram (CSS-based)
   ============================================================ */

.cs-arch {
  border: 1px solid var(--cs-line);
  border-radius: var(--cs-radius);
  padding: 2.5rem 2rem;
  background:
    linear-gradient(var(--cs-paper-soft), var(--cs-paper-soft)),
    linear-gradient(90deg, var(--cs-line) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(var(--cs-line) 1px, transparent 1px) 0 0 / 24px 24px;
  background-blend-mode: normal;
  margin: 2rem 0;
}

.cs-arch-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1rem;
}

.cs-arch-row.cs-arch-row-single { grid-template-columns: 1fr; }

.cs-arch-block {
  background: var(--cs-paper);
  border: 1px solid var(--cs-line);
  border-radius: var(--cs-radius-sm);
  padding: 1rem 1.2rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--cs-ink);
  font-weight: 500;
  box-shadow: var(--cs-shadow);
}

.cs-arch-block.cs-arch-core {
  background: var(--cs-ink);
  color: var(--cs-paper);
  font-weight: 700;
  padding: 1.2rem;
  border-color: var(--cs-ink);
}

.cs-arch-block strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--cs-ink-strong);
  margin-bottom: 0.2rem;
}

.cs-arch-block.cs-arch-core strong { color: var(--cs-paper); }

.cs-arch-block small {
  display: block;
  font-size: 0.78rem;
  color: var(--cs-stone);
  margin-top: 0.3rem;
}
.cs-arch-block.cs-arch-core small { color: rgba(255,255,255,0.7); }

.cs-arch-arrow {
  text-align: center;
  color: var(--cs-stone-soft);
  font-size: 1.4rem;
  margin: 0.4rem 0;
}

/* ============================================================
   CTA / banner
   ============================================================ */

.cs-banner {
  background: var(--cs-ink-strong);
  color: var(--cs-paper);
  border-radius: var(--cs-radius);
  padding: 3rem 2rem;
  text-align: center;
  margin: 4rem 0 2rem;
  position: relative;
  overflow: hidden;
}

.cs-banner::before {
  content: '';
  position: absolute;
  top: -50%; right: -10%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(220, 38, 38, 0.15), transparent 70%);
  pointer-events: none;
}

.cs-banner h2 {
  font-size: 1.8rem;
  font-weight: 800;
  margin: 0 0 0.6rem;
  letter-spacing: -0.01em;
}

.cs-banner p {
  font-size: 1rem;
  color: rgba(255,255,255,0.75);
  max-width: 540px;
  margin: 0 auto 1.5rem;
  line-height: 1.7;
}

/* ============================================================
   Article (text page like /architecture)
   ============================================================ */

.cs-article {
  max-width: 760px;
  margin: 3rem auto;
}

.cs-article h1 {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--cs-ink-strong);
  letter-spacing: -0.015em;
  margin-bottom: 1.5rem;
}

.cs-article h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--cs-ink-strong);
  margin: 2.5rem 0 0.8rem;
}

.cs-article h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--cs-ink-strong);
  margin: 1.6rem 0 0.5rem;
}

.cs-article p { color: var(--cs-ink); line-height: 1.75; }
.cs-article ul, .cs-article ol { color: var(--cs-ink); line-height: 1.75; }
.cs-article li { margin: 0.3rem 0; }

/* ============================================================
   Corner ribbon (Coming Soon)
   ============================================================ */

.cs-ribbon {
  position: fixed;
  z-index: 60;
  width: 200px;
  line-height: 34px;
  text-align: center;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  background: var(--cs-paper-edge);
  border: 1px solid var(--cs-line);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.15);
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.cs-ribbon a {
  display: block;
  padding: 0 1.5rem;
  color: var(--cs-ink);
  text-decoration: none;
  transition: color 0.2s;
}

.cs-ribbon:hover {
  background: var(--cs-accent);
  border-color: var(--cs-accent);
}

.cs-ribbon:hover a {
  color: #fff;
}

.cs-ribbon.top-right {
  top: 26px;
  right: -58px;
  transform: rotate(45deg);
}

@media (max-width: 768px) {
  .cs-ribbon {
    width: 160px;
    line-height: 30px;
    font-size: 11px;
    letter-spacing: 0.14em;
  }
  .cs-ribbon.top-right {
    top: 20px;
    right: -52px;
  }
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 900px) {
  .cs-header-inner { padding: 12px 18px; gap: 1rem; }
  .cs-logo { height: 30px; }
  .cs-nav ul { gap: 0; }
  .cs-nav li a { padding: 6px 8px; font-size: 0.85rem; }

  .cs-main { padding: 0 18px 3rem; }
  .cs-section { padding: 3rem 0; }

  .cs-stats { grid-template-columns: repeat(2, 1fr); }
  .cs-stat:nth-child(2) { border-right: none; }
  .cs-stat:nth-child(1), .cs-stat:nth-child(2) { border-bottom: 1px solid var(--cs-line); }

  .cs-features, .cs-features.cs-features-2,
  .cs-products,
  .cs-tag-grid,
  .cs-arch-row { grid-template-columns: 1fr; }

  .cs-showcase { grid-template-columns: 1fr; gap: 2rem; }
  .cs-showcase.reverse { direction: ltr; }

  .cs-footer-inner { grid-template-columns: 1fr; text-align: center; gap: 1.2rem; }
  .cs-footer-links, .cs-footer-meta { justify-content: center; text-align: center; }
}