/* ==========================================================================
   AREA3D DESIGN JOURNAL - SYSTEM STYLE SHEET
   Bespoke, current-feeling editorial publication design system.
   Strictly uses local system typography and high-end print-inspired details.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens & CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
  /* Warm Alabaster Color Palette */
  --bg-primary: #faf8f5;     /* Warm cream paper */
  --bg-secondary: #f3f0e8;   /* Slightly darker warm sand */
  --bg-tertiary: #e9e6dd;    /* Deeper sand block background */
  
  --text-primary: #1c1d1f;   /* Rich charcoal ink */
  --text-secondary: #4a4d52; /* Soft slate body */
  --text-muted: #82868e;     /* Cool gray for tags and metadata */
  
  --accent: #d23c22;         /* Terracotta/Crimson print ink */
  --accent-hover: #a12b17;   /* Darker terracotta */
  --accent-tint: rgba(210, 60, 34, 0.05); /* Tint for callouts/cards */
  --accent-border: rgba(210, 60, 34, 0.15);
  
  --border-color: rgba(28, 29, 31, 0.09);
  --border-hover: rgba(28, 29, 31, 0.25);
  --border-focus: #1c1d1f;
  
  /* System Typography Stacks */
  --font-title: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Charter", "Bitstream Charter", "Iowan Old Style", "Georgia", "Times New Roman", Times, serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, "Liberation Mono", Menlo, Courier, monospace;
  
  /* Layout Dimensions */
  --max-width-content: 42rem; /* Perfect reading length (approx. 672px) */
  --max-width-grid: 72rem;    /* Generous desktop width */
  
  /* Spacing Scale */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;
  --spacing-xxl: 6rem;
  
  /* Micro-motions */
  --transition-fast: 0.15s cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   2. Reset & Global Styles
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  line-height: 1.75;
  color: var(--text-secondary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --------------------------------------------------------------------------
   3. Accessible Focus & Skip Link
   -------------------------------------------------------------------------- */
a:focus-visible, 
button:focus-visible, 
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -10rem;
  z-index: 999;
  padding: 0.8rem 1.2rem;
  background: var(--text-primary);
  color: var(--bg-primary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1rem;
}

/* --------------------------------------------------------------------------
   4. Basic Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  color: var(--text-primary);
  line-height: 1.15;
  font-weight: 850;
  letter-spacing: -0.025em;
  text-wrap: balance; /* Balanced line wrapping */
}

p, li {
  text-wrap: pretty; /* Prevent orphans / runts */
}

a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

a:hover {
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   5. Site Header / Masthead (Magazine Cover Style)
   -------------------------------------------------------------------------- */
.header-container {
  width: 100%;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-primary);
}

.header-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.header-inner {
  max-width: var(--max-width-grid);
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-lg);
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  justify-items: center;
  text-align: center;
  gap: var(--spacing-md);
}

@media (min-width: 48rem) {
  .header-inner {
    grid-template-columns: auto 1fr auto;
    text-align: left;
    justify-items: start;
    gap: var(--spacing-lg);
  }
}

.logo-wrapper {
  display: flex;
  flex-direction: column;
}

.logo {
  font-family: var(--font-title);
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  color: var(--text-primary);
  line-height: 0.95;
}

.logo:hover {
  color: var(--accent);
}

.logo-dot {
  color: var(--accent);
}

.logo-sub {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: 0.25rem;
}

.header-tagline {
  display: none;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--text-secondary);
  border-left: 1px solid var(--border-color);
  padding-left: var(--spacing-lg);
  justify-self: center;
}

@media (min-width: 62rem) {
  .header-tagline {
    display: block;
  }
}

/* Primary Navigation bar */
.nav-list {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
  background-color: var(--bg-secondary);
  padding: 0.25rem;
  border-radius: 4px;
  border: 1px solid var(--border-color);
}

.nav-item {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 3px;
  transition: all var(--transition-fast);
}

.nav-item:hover {
  color: var(--accent);
  background-color: var(--bg-primary);
}

.nav-item.active {
  color: var(--bg-primary);
  background-color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   6. Main Content Layout
   -------------------------------------------------------------------------- */
main {
  flex: 1;
  max-width: var(--max-width-grid);
  width: 100%;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
}

/* --------------------------------------------------------------------------
   7. Homepage Design
   -------------------------------------------------------------------------- */
.hero-section {
  padding-bottom: var(--spacing-xl);
  border-bottom: 2px solid var(--text-primary);
  margin-bottom: var(--spacing-xl);
}

.hero-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.meta-tag {
  color: var(--accent);
  font-weight: 700;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.03em;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.hero-lead-wrapper {
  max-width: 48rem;
}

.hero-lead {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* Asymmetric 2-Column Homepage Grid */
.homepage-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  align-items: start;
}

@media (min-width: 48rem) {
  .homepage-grid {
    grid-template-columns: 7fr 5fr;
    gap: var(--spacing-xl);
  }
}

.column-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 2px solid var(--text-primary);
  padding-bottom: var(--spacing-xs);
  margin-bottom: var(--spacing-lg);
}

.column-title {
  font-family: var(--font-title);
  font-size: 1.05rem;
  font-weight: 850;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--text-primary);
}

.accent-dot {
  width: 6px;
  height: 6px;
  background-color: var(--accent);
  display: inline-block;
  border-radius: 50%;
}

.view-all-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
}

.view-all-link:hover {
  color: var(--accent);
}

/* Journal Lists & Cards */
.entries-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.journal-card {
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  transition: border-color var(--transition-fast);
}

.journal-card:hover {
  border-color: var(--border-hover);
}

.card-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  text-transform: uppercase;
}

.card-tag {
  color: var(--accent);
  font-weight: 700;
}

.card-title {
  font-family: var(--font-title);
  font-size: 1.6rem;
  font-weight: 850;
  line-height: 1.15;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.02em;
}

.card-title a {
  color: var(--text-primary);
}

.card-title a:hover {
  color: var(--accent);
}

.card-excerpt {
  font-family: var(--font-serif);
  color: var(--text-secondary);
  font-size: 1.02rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.card-action {
  margin-top: var(--spacing-sm);
}

.read-more-btn {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.read-more-btn .arrow {
  display: inline-block;
  transition: transform var(--transition-fast);
}

.read-more-btn:hover {
  color: var(--accent-hover);
}

.read-more-btn:hover .arrow {
  transform: translateX(4px);
}

/* Featured Article Card Custom Aesthetics */
.featured-card {
  border-bottom: 2px solid var(--text-primary);
  padding-bottom: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.featured-card:hover {
  border-bottom-color: var(--text-primary);
}

.featured-card .featured-image-wrapper {
  width: 100%;
  border: 1px solid var(--border-color);
  padding: 0.4rem;
  background-color: var(--bg-secondary);
  margin-bottom: var(--spacing-md);
}

.featured-card .featured-image-preview {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  filter: grayscale(100%) contrast(1.05) brightness(0.95);
  transition: filter var(--transition-normal), transform var(--transition-normal);
}

.featured-card:hover .featured-image-preview {
  filter: grayscale(0%) contrast(1) brightness(1);
}

.featured-title {
  font-size: 2.1rem;
  line-height: 1.1;
  margin-bottom: var(--spacing-sm);
}

.featured-excerpt {
  font-size: 1.12rem;
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   8. Specifications Sidebar Card (Magazine Style Specs)
   -------------------------------------------------------------------------- */
.specs-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.spec-table-wrapper {
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.spec-table caption {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.spec-table th, 
.spec-table td {
  padding: 0.75rem var(--spacing-md);
  text-align: left;
}

.spec-table th {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--text-primary);
}

.spec-table td {
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

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

.spec-table tr:hover td {
  color: var(--accent);
  background-color: var(--accent-tint);
}

/* Philosophy Quote */
.philosophy-quote {
  border-left: 2px solid var(--accent);
  padding-left: var(--spacing-md);
  margin-top: var(--spacing-xs);
}

.philosophy-quote blockquote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.98rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   9. Journal Index Page Layout (Clean Table of Contents style)
   -------------------------------------------------------------------------- */
.page-header {
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--text-primary);
  margin-bottom: var(--spacing-xl);
}

.page-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: var(--spacing-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-title {
  font-size: clamp(2.2rem, 6vw, 3.2rem);
  font-weight: 900;
  line-height: 1.05;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.page-subtitle {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 42rem;
  line-height: 1.5;
}

.journal-list-container {
  max-width: var(--max-width-grid);
  margin: 0 auto;
}

.journal-entries-grid {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.journal-list-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid var(--border-color);
  align-items: start;
  transition: background-color var(--transition-fast);
}

@media (min-width: 48rem) {
  .journal-list-item {
    grid-template-columns: 3fr 9fr;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg) var(--spacing-md);
  }
  
  .journal-list-item:hover {
    background-color: var(--bg-secondary);
    border-radius: 4px;
  }
}

.item-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  text-transform: uppercase;
}

@media (min-width: 48rem) {
  .item-meta {
    flex-direction: column;
    gap: var(--spacing-xs);
  }
}

.item-date {
  color: var(--accent);
  font-weight: 700;
}

.item-content-preview {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.item-title {
  font-size: 1.45rem;
  font-weight: 850;
  line-height: 1.2;
}

.item-title a {
  color: var(--text-primary);
}

.item-title a:hover {
  color: var(--accent);
}

.item-excerpt {
  font-family: var(--font-serif);
  color: var(--text-secondary);
  font-size: 1.02rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-sm);
}

.item-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent);
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  width: fit-content;
}

.item-link .arrow {
  transition: transform var(--transition-fast);
}

.item-link:hover {
  color: var(--accent-hover);
}

.item-link:hover .arrow {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   10. Article Detail Layout (Single View)
   -------------------------------------------------------------------------- */
.single-post-container, 
.single-page-container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--spacing-xs);
}

.post-header {
  margin-bottom: var(--spacing-xl);
  text-align: left;
}

.post-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-transform: uppercase;
}

.post-date {
  color: var(--accent);
  font-weight: 700;
}

.post-title {
  font-size: clamp(2rem, 7vw, 2.9rem);
  font-weight: 900;
  line-height: 1.08;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.post-intro {
  font-family: var(--font-serif);
  font-size: 1.22rem;
  line-height: 1.65;
  color: var(--text-secondary);
  font-style: italic;
  margin-top: var(--spacing-lg);
  border-left: 2px solid var(--accent);
  padding-left: var(--spacing-md);
}

.post-featured-image {
  margin-bottom: var(--spacing-xl);
  border: 1px solid var(--border-color);
  padding: 0.4rem;
  background-color: var(--bg-secondary);
}

.post-featured-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* Article Body Content */
.post-content, 
.page-content {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--text-primary);
}

/* Drop Cap on first article letter for printed magazine aesthetic */
.post-content > p:first-of-type::first-letter {
  float: left;
  font-size: 4.5rem;
  line-height: 0.82;
  margin-top: 0.15rem;
  margin-right: 0.55rem;
  font-weight: 900;
  color: var(--accent);
  font-family: var(--font-title);
}

.post-content p, 
.page-content p {
  margin-bottom: 1.6rem;
}

.post-content a, 
.page-content a {
  text-decoration: underline;
  text-decoration-color: var(--accent-border);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition-fast), color var(--transition-fast);
}

.post-content a:hover, 
.page-content a:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

.post-content h2, 
.page-content h2 {
  font-size: 1.6rem;
  font-weight: 850;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.post-content h3, 
.page-content h3 {
  font-size: 1.3rem;
  font-weight: 800;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.015em;
}

.post-content ul, 
.post-content ol, 
.page-content ul, 
.page-content ol {
  margin-bottom: 1.6rem;
  padding-left: var(--spacing-lg);
}

.post-content li, 
.page-content li {
  margin-bottom: 0.5rem;
}

.post-content blockquote, 
.page-content blockquote {
  border-left: 3px solid var(--accent);
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--bg-secondary);
  font-style: italic;
  color: var(--text-secondary);
  margin: var(--spacing-lg) 0;
  font-size: 1.1rem;
}

.post-content code, 
.page-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background-color: var(--bg-secondary);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.post-content pre, 
.page-content pre {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: var(--spacing-md);
  border-radius: 4px;
  overflow-x: auto;
  margin-bottom: 1.6rem;
}

.post-content pre code, 
.page-content pre code {
  background-color: transparent;
  padding: 0;
  border: none;
  font-size: 0.8rem;
}

/* Post footer & Nav */
.post-footer {
  margin-top: var(--spacing-xl);
}

.wireframe-hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin-bottom: var(--spacing-lg);
}

.post-navigation {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.back-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid var(--border-color);
  padding: 0.5rem var(--spacing-md);
  border-radius: 3px;
  transition: all var(--transition-fast);
}

.back-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  background-color: var(--bg-secondary);
}

/* --------------------------------------------------------------------------
   11. Contact Page Custom Layout
   -------------------------------------------------------------------------- */
.contact-page-container .page-content {
  margin-bottom: var(--spacing-lg);
}

.contact-wireframe-card {
  margin-top: var(--spacing-xl);
  border: 1px solid var(--accent-border);
  background-color: var(--accent-tint);
  padding: var(--spacing-lg);
  border-radius: 4px;
}

.card-title-mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: var(--spacing-md);
  letter-spacing: 0.05em;
}

.contact-details-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

@media (min-width: 35rem) {
  .contact-details-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
}

.contact-detail-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.contact-detail-item .label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 650;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-detail-item .value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.contact-detail-item .value a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: var(--accent-border);
}

.contact-detail-item .value a:hover {
  color: var(--accent-hover);
  text-decoration-color: var(--accent-hover);
}

/* --------------------------------------------------------------------------
   12. Fallback Generic Lists
   -------------------------------------------------------------------------- */
.list-container {
  max-width: var(--max-width-content);
  margin: 0 auto;
}

.list-item {
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--border-color);
}

.list-item:last-child {
  border-bottom: none;
}

.item-summary {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  margin-top: var(--spacing-xs);
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   13. Responsive Adaptations
   -------------------------------------------------------------------------- */
@media (max-width: 48rem) {
  :root {
    --spacing-lg: 1.5rem;
    --spacing-xl: 3rem;
  }
  
  body {
    font-size: 1.1rem;
  }
  
  main {
    padding: var(--spacing-lg) var(--spacing-md);
  }
  
  .header-inner {
    padding: var(--spacing-md) var(--spacing-md);
  }
  
  .logo {
    font-size: 1.8rem;
  }
  
  .nav-list {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-xs);
  }
  
  .nav-item {
    font-size: 0.72rem;
    padding: var(--spacing-xs) var(--spacing-sm);
  }
  
  .spec-table th, 
  .spec-table td {
    padding: 0.6rem var(--spacing-sm);
  }
  
  .back-link {
    font-size: 0.65rem;
    padding: 0.4rem var(--spacing-sm);
  }
}