/* ==========================================================================
   ImmTelecom Brutalist Monochrome Engineering UI Design System
   Surgical White (#ffffff) | Obsidian Black (#0f1115) | Concrete Grey (#e4e4e7)
   Utilitarian wireframe layout with razor-sharp 1px hairline boundaries
   ========================================================================== */

:root {
  /* Day Mode (Default) */
  --bg-primary: #ffffff;
  --bg-secondary: #f9f9fb;
  --bg-obsidian: #0f1115;
  --bg-card: #ffffff;
  --border-hairline: #e4e4e7;
  --border-sharp: #0f1115;
  --border-subtle: #d4d4d8;
  --text-primary: #0f1115;
  --text-secondary: #3f3f46;
  --text-muted: #71717a;
  --charcoal-dense: #18181b;
  --accent-inverse-bg: #0f1115;
  --accent-inverse-text: #ffffff;
  --tag-bg: #f4f4f5;
  --tag-border: #e4e4e7;
  --nav-bg: rgba(255, 255, 255, 0.95);
  --header-top-bg: #0f1115;
  --header-top-text: #e4e4e7;
  --shadow-tactile: 3px 3px 0px #0f1115;
  --shadow-tactile-sm: 2px 2px 0px #0f1115;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", "Roboto Mono", Consolas, "Courier New", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

[data-theme="dark"] {
  /* Night Mode */
  --bg-primary: #090a0d;
  --bg-secondary: #111318;
  --bg-obsidian: #000000;
  --bg-card: #0d0f14;
  --border-hairline: #27272a;
  --border-sharp: #e4e4e7;
  --border-subtle: #3f3f46;
  --text-primary: #f4f4f5;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --charcoal-dense: #fafafa;
  --accent-inverse-bg: #f4f4f5;
  --accent-inverse-text: #090a0d;
  --tag-bg: #18181b;
  --tag-border: #27272a;
  --nav-bg: rgba(9, 10, 13, 0.95);
  --header-top-bg: #000000;
  --header-top-text: #a1a1aa;
  --shadow-tactile: 3px 3px 0px #e4e4e7;
  --shadow-tactile-sm: 2px 2px 0px #e4e4e7;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.25s ease, color 0.25s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.15s ease;
}

/* Top Obsidian Banner / Terminal Announcement */
.top-obsidian-banner {
  background: var(--header-top-bg);
  color: var(--header-top-text);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  padding: 0.5rem 1.5rem;
  border-bottom: 1px solid var(--border-hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.banner-telemetry {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.telemetry-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.status-dot {
  width: 6px;
  height: 6px;
  background-color: #22c55e;
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 6px #22c55e;
}

/* Kinetic Announcement Log */
.announcement-log {
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: transform 0.15s ease, color 0.15s ease;
}

.announcement-log:hover {
  transform: translateX(4px);
  color: #ffffff;
}

.announcement-log:hover::before {
  content: "->";
  font-family: var(--font-mono);
  font-weight: 700;
}

/* Layout Containers & Sections */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--border-hairline);
  position: relative;
}

.section-header {
  margin-bottom: 3.5rem;
}

.section-label-mono {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-label-mono::before {
  content: "//";
  color: var(--text-primary);
  font-weight: 900;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 0.85rem;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 760px;
  line-height: 1.7;
}

/* Brutalist Header & Sticky Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-sharp);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--text-primary);
}

.brand-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  background: var(--text-primary);
  color: var(--bg-primary);
  border-radius: 0px;
  font-weight: 700;
}

.brand-logo-img {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 6px;
  object-fit: cover;
  display: inline-block;
  vertical-align: middle;
  border: 1px solid var(--border-hairline);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  transition: transform 0.15s ease;
}

.nav-brand:hover .brand-logo-img {
  transform: scale(1.05);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 0.35rem 0.25rem;
  position: relative;
  transition: color 0.15s ease;
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link.highlight {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-primary);
  background: var(--tag-bg);
  border: 1px solid var(--border-subtle);
  padding: 0.25rem 0.65rem;
}

.nav-link.highlight:hover {
  background: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Brutalist Refined Theme Switcher */
.theme-toggle-btn {
  background: var(--bg-primary);
  border: 1px solid var(--border-sharp);
  width: 2.35rem;
  height: 2.35rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-primary);
  transition: all 0.1s ease;
}

.theme-toggle-btn:hover {
  background: var(--text-primary);
  color: var(--bg-primary);
  box-shadow: var(--shadow-tactile-sm);
  transform: translate(-1px, -1px);
}

.theme-toggle-btn svg {
  width: 1.15rem;
  height: 1.15rem;
}

.sun-icon { display: none; }
.moon-icon { display: block; }
[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }

/* Brutalist Buttons & Sharp Flat Inversion */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 700;
  padding: 0.75rem 1.6rem;
  cursor: pointer;
  white-space: nowrap;
  border-radius: 0px;
  text-decoration: none;
  transition: all 0.1s cubic-bezier(0.2, 0, 0, 1);
}

.btn-primary {
  background: var(--text-primary);
  color: var(--bg-primary) !important;
  border: 1px solid var(--text-primary);
}

.btn-primary:hover {
  background: var(--bg-secondary);
  color: var(--text-primary) !important;
  border-color: var(--text-primary);
  box-shadow: var(--shadow-tactile);
  transform: translate(-2px, -2px);
}

.btn-primary:active {
  background: var(--bg-primary) !important;
  color: var(--text-primary) !important;
  border: 2px solid var(--text-primary);
  box-shadow: none !important;
  transform: translate(0, 0);
}

.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-sharp);
}

.btn-secondary:hover {
  background: var(--tag-bg);
  box-shadow: var(--shadow-tactile);
  transform: translate(-2px, -2px);
}

.btn-secondary:active {
  background: var(--text-primary) !important;
  color: var(--bg-primary) !important;
  transform: translate(0, 0);
  box-shadow: none;
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 0.95rem 2.2rem;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

/* Hero Section */
.hero-section {
  padding: 5rem 0 4.5rem 0;
  border-bottom: 1px solid var(--border-hairline);
  background: var(--bg-primary);
}

.hero-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px dashed var(--border-hairline);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.hero-headline {
  font-size: 3.5rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  max-width: 980px;
}

.hero-headline span.brand-text {
  background: var(--bg-obsidian);
  color: #ffffff;
  padding: 0 0.4rem;
  display: inline-block;
  margin-right: 0.25rem;
}

[data-theme="dark"] .hero-headline span.brand-text {
  background: #ffffff;
  color: #000000;
}

.hero-subheadline {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 820px;
  margin-bottom: 2.5rem;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

/* Mechanical Action Hubs / Telemetry Matrix */
.engineering-matrix {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--border-sharp);
  background: var(--border-hairline);
}

.matrix-pad {
  background: var(--bg-card);
  padding: 1.75rem 1.5rem;
  position: relative;
  transition: all 0.1s steps(2);
}

.matrix-pad:hover {
  background: var(--bg-secondary);
  outline: 2px solid var(--text-primary);
  z-index: 2;
}

.matrix-subsystem {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.matrix-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 0.35rem;
}

.matrix-desc {
  font-size: 0.86rem;
  color: var(--text-secondary);
}

/* Core Advantages (3 Features Wireframe Cards) */
.features-wireframe-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.feature-wireframe-card {
  border: 1px solid var(--border-sharp);
  background: var(--bg-card);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.1s steps(2);
}

.feature-wireframe-card:hover {
  box-shadow: var(--shadow-tactile);
  transform: translate(-3px, -3px);
  outline: 1px solid var(--text-primary);
}

.feature-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.75rem;
  padding-bottom: 1rem;
  border-bottom: 1px dashed var(--border-hairline);
}

.feature-serial {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--text-primary);
  background: var(--tag-bg);
  border: 1px solid var(--border-subtle);
  padding: 0.2rem 0.5rem;
}

.feature-title {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.85rem;
}

.feature-desc {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.specs-list {
  list-style: none;
  margin-top: auto;
  border-top: 1px solid var(--border-hairline);
  padding-top: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.specs-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  margin-bottom: 0.65rem;
}

.specs-item::before {
  content: "■";
  color: var(--text-primary);
  font-size: 0.65rem;
}

/* Media & AI Showcase Wireframes */
.showcase-wireframe-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.showcase-wireframe-pad {
  border: 1px solid var(--border-sharp);
  background: var(--bg-card);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  transition: all 0.1s steps(2);
}

.showcase-wireframe-pad:hover {
  box-shadow: var(--shadow-tactile);
  transform: translate(-3px, -3px);
}

.showcase-subsystem-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.status-badge-mono {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.2rem 0.65rem;
  border: 1px solid var(--border-sharp);
  background: var(--tag-bg);
  font-weight: 700;
}

.showcase-title {
  font-size: 1.75rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 0.85rem;
}

.showcase-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.dense-grid-pad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-top: auto;
}

.dense-item {
  border: 1px solid var(--border-hairline);
  background: var(--tag-bg);
  padding: 0.85rem 0.65rem;
  text-align: center;
  transition: all 0.15s ease;
}

.dense-item:hover {
  border-color: var(--border-sharp);
  background: var(--bg-primary);
  transform: translateY(-2px);
}

.dense-item-name {
  font-size: 0.88rem;
  font-weight: 700;
  display: block;
  margin-bottom: 0.25rem;
}

.dense-item-status {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Authentic Pricing Comparison Table */
.pricing-matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.pricing-wireframe-card {
  border: 1px solid var(--border-sharp);
  background: var(--bg-card);
  padding: 2.75rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.1s steps(2);
}

.pricing-wireframe-card:hover {
  box-shadow: var(--shadow-tactile);
  transform: translate(-3px, -3px);
}

.pricing-wireframe-card.featured-tier {
  border: 2px solid var(--border-sharp);
  background: var(--bg-secondary);
  box-shadow: var(--shadow-tactile);
}

.featured-flag {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--text-primary);
  color: var(--bg-primary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.35rem 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.plan-tier-mono {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.plan-title {
  font-size: 1.55rem;
  font-weight: 900;
  margin-bottom: 0.65rem;
}

.plan-summary {
  font-size: 0.9rem;
  color: var(--text-secondary);
  min-height: 2.8rem;
  line-height: 1.55;
}

.plan-price-block {
  margin: 1.75rem 0;
  padding: 1.25rem 0;
  border-top: 1px dashed var(--border-hairline);
  border-bottom: 1px dashed var(--border-hairline);
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}

.currency-symbol {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
}

.price-integer {
  font-family: var(--font-mono);
  font-size: 3.25rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
}

.billing-cycle {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-left: 0.35rem;
}

.features-check-list {
  list-style: none;
  margin-bottom: 2.25rem;
  flex-grow: 1;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
  line-height: 1.5;
}

.check-item-icon {
  font-family: var(--font-mono);
  font-weight: 900;
  color: var(--text-primary);
  flex-shrink: 0;
}

.check-item.disabled {
  color: var(--text-muted);
  text-decoration: line-through;
}

.check-item.disabled .check-item-icon {
  color: var(--text-muted);
}

/* Reviews / Testimonials Brutalist Grid */
.reviews-wireframe-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.review-wireframe-pad {
  border: 1px solid var(--border-sharp);
  background: var(--bg-card);
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
  transition: all 0.1s steps(2);
}

.review-wireframe-pad:hover {
  box-shadow: var(--shadow-tactile);
  transform: translate(-2px, -2px);
}

.review-rating-mono {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.review-quote {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 1.75rem;
  flex-grow: 1;
}

.review-author-meta {
  border-top: 1px solid var(--border-hairline);
  padding-top: 1rem;
  font-family: var(--font-mono);
}

.author-primary-name {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-primary);
}

.author-sub-role {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* FAQ Accordion Details */
.faq-wireframe-container {
  max-width: 900px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-wireframe-item {
  border: 1px solid var(--border-sharp);
  background: var(--bg-card);
  transition: all 0.15s ease;
}

.faq-wireframe-item[open] {
  box-shadow: var(--shadow-tactile-sm);
  background: var(--bg-secondary);
}

.faq-summary-btn {
  padding: 1.5rem 1.75rem;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
}

.faq-summary-btn::-webkit-details-marker {
  display: none;
}

.faq-toggle-mono {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  transition: transform 0.15s ease;
}

.faq-wireframe-item[open] .faq-toggle-mono {
  transform: rotate(45deg);
}

.faq-content-body {
  padding: 0 1.75rem 1.5rem 1.75rem;
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.75;
  border-top: 1px dashed var(--border-hairline);
  padding-top: 1.25rem;
}

/* Brutalist Footer (Strictly 4 links only) */
.footer {
  margin-top: auto;
  background: var(--bg-obsidian);
  color: #e4e4e7;
  border-top: 1px solid var(--border-sharp);
  padding: 3.5rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-brand-block {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.footer-brand-name {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: #ffffff;
  font-family: var(--font-sans);
}

.footer-logo-img {
  width: 1.85rem;
  height: 1.85rem;
  border-radius: 5px;
  object-fit: cover;
  display: inline-block;
  vertical-align: middle;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #a1a1aa;
}

.footer-links-list {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.footer-item-link {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 700;
  color: #e4e4e7;
  letter-spacing: 0.05em;
  transition: all 0.15s ease;
  position: relative;
}

.footer-item-link:hover {
  color: #ffffff;
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Dedicated Subpage Styles (About, Terms, Privacy, Sitemap, News) */
.subpage-container {
  padding: 4rem 0 6rem 0;
}

.subpage-box {
  border: 1px solid var(--border-sharp);
  background: var(--bg-card);
  padding: 3.5rem;
  box-shadow: var(--shadow-tactile);
}

.subpage-box h2 {
  font-size: 1.6rem;
  font-weight: 900;
  margin: 2.5rem 0 1rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-hairline);
}

.subpage-box h2:first-of-type {
  margin-top: 0;
}

.subpage-box p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.25rem;
}

.subpage-box ul {
  list-style: none;
  margin-bottom: 1.75rem;
}

.subpage-box li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.subpage-box li::before {
  content: "->";
  position: absolute;
  left: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-primary);
}

.engineering-notice-bar {
  border: 1px solid var(--border-sharp);
  background: var(--tag-bg);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  border-left: 5px solid var(--text-primary);
}

/* Dispatch / News Bulletin Layout */
.dispatch-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.dispatch-card {
  border: 1px solid var(--border-sharp);
  background: var(--bg-card);
  padding: 2rem;
  transition: all 0.1s steps(2);
}

.dispatch-card:hover {
  box-shadow: var(--shadow-tactile-sm);
  transform: translate(-2px, -2px);
}

.dispatch-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.85rem;
}

.dispatch-badge {
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 0.15rem 0.45rem;
  font-weight: 700;
}

.dispatch-headline {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.dispatch-summary {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.dispatch-read-more {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.dispatch-read-more:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Article & SEO Documentation Styles
   Table of Contents, Typography, Code Blocks, FAQ & Related Reading
   ========================================================================== */
.article-wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 3rem 0 5rem 0;
}

.breadcrumb-nav {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.breadcrumb-nav a {
  color: var(--text-secondary);
  transition: color 0.15s ease;
}

.breadcrumb-nav a:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

.breadcrumb-separator {
  color: var(--text-muted);
}

.article-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-hairline);
}

.article-badge-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.article-title {
  font-size: 2.35rem;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.035em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.article-meta-row {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-toc {
  border: 1px solid var(--border-sharp);
  background: var(--tag-bg);
  padding: 1.75rem 2rem;
  margin: 2.5rem 0 3.5rem 0;
  border-left: 5px solid var(--text-primary);
}

.article-toc-title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding-left: 0.25rem;
}

.article-toc-list li a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: color 0.15s ease, transform 0.15s ease;
}

.article-toc-list li a:hover {
  color: var(--text-primary);
  text-decoration: underline;
  transform: translateX(3px);
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.article-body h2 {
  font-size: 1.65rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin: 3.25rem 0 1.25rem 0;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--border-hairline);
  scroll-margin-top: 5.5rem;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 2rem 0 0.85rem 0;
  scroll-margin-top: 5.5rem;
}

.article-body p {
  margin-bottom: 1.35rem;
}

.article-body ul, .article-body ol {
  margin: 1rem 0 1.5rem 1.75rem;
}

.article-body li {
  margin-bottom: 0.65rem;
  line-height: 1.75;
}

.article-body strong {
  color: var(--text-primary);
  font-weight: 700;
}

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--tag-bg);
  border: 1px solid var(--border-subtle);
  padding: 0.15em 0.45em;
  border-radius: 2px;
  color: var(--text-primary);
}

.article-body pre {
  background: var(--header-top-bg);
  color: #f4f4f5;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 1.75rem 0;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  border: 1px solid var(--border-sharp);
  line-height: 1.6;
}

.article-body pre code {
  background: none;
  border: none;
  color: inherit;
  padding: 0;
}

.article-body blockquote {
  border-left: 4px solid var(--text-primary);
  background: var(--tag-bg);
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
  color: var(--text-primary);
  font-style: normal;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.92rem;
}

.article-body th, .article-body td {
  border: 1px solid var(--border-hairline);
  padding: 0.85rem 1.15rem;
  text-align: left;
}

.article-body th {
  background: var(--tag-bg);
  font-family: var(--font-mono);
  font-weight: 800;
  color: var(--text-primary);
}

.article-body tr:nth-child(even) {
  background: var(--tag-bg);
}

.article-cta-box {
  border: 2px solid var(--border-sharp);
  background: var(--bg-card);
  padding: 2.5rem 2rem;
  margin: 3.5rem 0;
  text-align: center;
  box-shadow: var(--shadow-tactile);
}

.article-cta-box h3 {
  font-size: 1.45rem;
  font-weight: 900;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.article-cta-box p {
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 1.75rem auto;
  font-size: 0.98rem;
}

.article-faq-section {
  margin-top: 4.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border-hairline);
}

.related-reading-section {
  margin-top: 4.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border-hairline);
}

.related-reading-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.related-reading-card {
  border: 1px solid var(--border-sharp);
  background: var(--bg-card);
  padding: 1.5rem;
  transition: all 0.1s steps(2);
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.related-reading-card:hover {
  box-shadow: var(--shadow-tactile-sm);
  transform: translate(-2px, -2px);
}

.related-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.related-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.related-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-top: auto;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .features-wireframe-grid,
  .pricing-matrix-grid,
  .reviews-wireframe-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .engineering-matrix {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-headline {
    font-size: 2.35rem;
  }
  
  .hero-subheadline {
    font-size: 1.05rem;
  }
  
  .features-wireframe-grid,
  .showcase-wireframe-grid,
  .pricing-matrix-grid,
  .reviews-wireframe-grid,
  .engineering-matrix {
    grid-template-columns: 1fr;
  }
  
  .nav-menu {
    display: none;
  }
  
  .subpage-box {
    padding: 2rem 1.5rem;
  }
  
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
  
  .footer-links-list {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.25rem;
  }
  
  .dense-grid-pad {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .hero-headline {
    font-size: 1.95rem;
  }
  
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-cta-group .btn {
    width: 100%;
  }
  
  .dense-grid-pad {
    grid-template-columns: 1fr;
  }
}