/* ==========================================================================
   MJD-MD-000 // STYLESHEET SPECIFICATION
   Aesthetic: Bauhaus / 1980s Factory Records / Cassette Futurism
   Zero-bloat, strict 4-level type scale, 4-step spacing, zero-radius
   ========================================================================== */

/* --- Strict Design Tokens --- */
:root {
  /* 4-Step Spacing Scale (8px, 16px, 24px, 32px) */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;

  /* 4-Level Typography Scale */
  --text-title: clamp(1.75rem, 3.5vw, 2.5rem);       /* Page Titles / Primary Section Headers */
  --text-header: clamp(1.1rem, 2vw, 1.25rem);        /* Section Subheaders / Card Titles */
  --text-body: 1rem;                                 /* Base Body / Narrative Prose */
  --text-caption: 0.8125rem;                         /* Monospace Badges, Metadata, Buttons, Tags */

  /* Cohesive Editorial Palette (Light Mode: Warm Archival Paper) */
  --bg-primary: #F4F1EA;
  --bg-secondary: #EAE5DB;
  --bg-card: #FAF8F3;
  --ink-primary: #121212;
  --ink-secondary: #4A4843;
  --border-color: #121212;
  --accent: #FF4F00;                                 /* International Orange */
  --accent-contrast: #FFFFFF;
  --signal-ok: #008F5A;
  --signal-err: #D92B2B;

  /* Typography Stacks */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, 'Courier New', monospace;
  --transition-fast: 0.15s ease-in-out;
}

[data-theme="dark"] {
  --bg-primary: #121212;
  --bg-secondary: #1A1A1A;
  --bg-card: #181818;
  --ink-primary: #F4F1EA;
  --ink-secondary: #A09C94;
  --border-color: #383632;
  --accent: #FF4F00;
  --accent-contrast: #121212;
  --signal-ok: #10B981;
  --signal-err: #EF4444;
}

/* --- Global Reset & Strict Bauhaus Enforcement --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important; /* Strict Bauhaus zero-radius */
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 60px;
  background-color: var(--bg-primary);
  color: var(--ink-primary);
  overflow-x: hidden;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--ink-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  border-left: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  max-width: 1440px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  font-variant-numeric: tabular-nums;
}

/* --- Chassis Header Bar --- */
.chassis-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: stretch;
  background-color: var(--bg-primary);
  border-bottom: 2px solid var(--border-color);
}

.chassis-cell {
  display: flex;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  border-right: 1px solid var(--border-color);
}

.chassis-cell:last-child {
  border-right: none;
}

.chassis-id {
  gap: var(--space-xs);
}

.catalogue-tag {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  background-color: var(--accent);
  color: var(--accent-contrast);
  padding: 4px var(--space-xs);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.site-title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-weight: 800;
  letter-spacing: -0.02em;
  white-space: nowrap;
  display: inline-flex;
  align-items: baseline;
  gap: 0.35em;
  line-height: 1.2;
}

.site-title .title-prefix,
.site-title .title-suffix {
  font-family: var(--font-mono);
  font-size: 0.75em;
  font-weight: 700;
  color: var(--ink-secondary);
  letter-spacing: 0.04em;
}

.chassis-nav {
  gap: var(--space-sm);
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--ink-secondary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  padding: 0 var(--space-xs);
  transition: color var(--transition-fast);
}

.nav-link .nav-num {
  color: var(--accent);
  font-weight: 700;
}

.nav-link:hover, .nav-link:focus {
  color: var(--ink-primary);
}

/* Mechanical Theme Toggle Button (44px hit area) */
.theme-toggle-btn {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  background: var(--bg-card);
  color: var(--ink-primary);
  border: 1px solid var(--border-color);
  min-height: 44px;
  padding: 0 var(--space-xs);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.05em;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.theme-toggle-btn:hover,
.theme-toggle-btn:focus-visible {
  border-color: var(--accent);
  outline: none;
}

.theme-prefix {
  font-size: var(--text-caption);
  color: var(--ink-secondary);
  letter-spacing: 0.08em;
  padding-right: 6px;
  border-right: 1px solid var(--border-color);
  user-select: none;
}

.theme-switch-frame {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.theme-opt {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 6px;
  font-size: var(--text-caption);
  letter-spacing: 0.04em;
  transition: all var(--transition-fast);
  user-select: none;
}

.theme-opt.active {
  color: var(--ink-primary);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

.theme-opt.inactive {
  color: var(--ink-secondary);
  opacity: 0.55;
}

.theme-toggle-btn:hover .theme-opt.inactive {
  opacity: 1;
  color: var(--accent);
}

.theme-led {
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: transparent;
  border: 1px solid var(--ink-secondary);
  transition: all var(--transition-fast);
}

.theme-opt.active .theme-led {
  background-color: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 6px var(--accent);
}

.opt-icon {
  font-size: 1em;
  line-height: 1;
}

.theme-sep {
  color: var(--border-color);
  font-size: var(--text-caption);
  user-select: none;
}

/* --- Main Layout & Grid Sections --- */
main {
  flex: 1;
}

.grid-section {
  border-bottom: 2px solid var(--border-color);
}

/* --- Uniform Section Intros --- */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-xs) var(--space-md);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
}

.section-header .cat-num {
  font-size: var(--text-caption);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.section-header h2 {
  font-family: var(--font-sans);
  font-size: var(--text-header);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.section-intro {
  padding: var(--space-md) var(--space-lg) var(--space-sm);
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
}

.intro-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xs);
}

.section-intro .cat-num {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
  display: block;
}

.section-intro h2 {
  font-family: var(--font-sans);
  font-size: var(--text-title);
  font-weight: 800;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
  line-height: 1.1;
  color: var(--ink-primary);
}

.section-intro p {
  font-size: var(--text-body);
  color: var(--ink-primary);
  line-height: 1.65;
  max-width: 82ch;
}

.section-intro code {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  background-color: var(--bg-secondary);
  color: var(--accent);
  padding: 2px 6px;
  border: 1px solid var(--border-color);
  font-weight: 600;
}

.mono-meta {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  color: var(--ink-secondary);
  font-weight: 600;
}

.status-indicator {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.status-indicator::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--signal-ok);
}

/* --- Section 01: About Grid Layout & Spec List --- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
}

.about-prose {
  border-right: 1px solid var(--border-color);
  padding: var(--space-lg) var(--space-md);
  background-color: var(--bg-primary);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-md);
}

.about-prose p {
  font-size: var(--text-body);
  line-height: 1.6;
  color: var(--ink-primary);
}

.about-prose .lead {
  font-size: var(--text-header);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--ink-primary);
  border-left: 3px solid var(--accent);
  padding-left: var(--space-sm);
}

.about-prose a {
  color: var(--ink-primary);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 3px;
  font-weight: 600;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

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

.about-specs {
  padding: var(--space-lg) var(--space-md);
  background-color: var(--bg-secondary);
  display: flex;
  align-items: center;
}

.spec-list {
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  display: flex;
  flex-direction: column;
  width: 100%;
}

.spec-list dt {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
  padding: var(--space-xs) var(--space-sm) 0;
  background-color: var(--bg-card);
}

.spec-list dd {
  font-weight: 600;
  font-size: var(--text-caption);
  color: var(--ink-primary);
  padding: 0 var(--space-sm) var(--space-xs);
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-card);
  line-height: 1.45;
}

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

.spec-list dd a {
  color: var(--ink-primary);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 3px;
  font-family: var(--font-mono);
  font-weight: 700;
  transition: color var(--transition-fast);
}

.spec-list dd a:hover {
  color: var(--accent);
}

/* --- Section 02: Coding Experiments Grid --- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  border-left: 1px solid var(--border-color);
}

.project-card {
  background-color: var(--bg-card);
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  transition: outline var(--transition-fast);
}

.project-card:hover {
  outline: 2px solid var(--accent);
  z-index: 2;
}

/* Hero visual weight for Interactive Dashboards */
.project-card:first-child {
  border-left: 3px solid var(--accent);
}

@media (min-width: 1024px) {
  .project-card:first-child {
    grid-column: span 2;
  }
}

.card-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
}

.card-cat-group {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.card-cat {
  font-weight: 700;
  font-size: var(--text-caption);
  color: var(--accent);
}

.card-date {
  color: var(--ink-secondary);
  font-family: var(--font-mono);
  font-size: var(--text-caption);
}

.card-status {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--text-caption);
  color: var(--signal-ok);
}

.card-content {
  padding: var(--space-sm);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-category-tag {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.card-title {
  font-size: var(--text-header);
  font-weight: 700;
  margin-bottom: var(--space-xs);
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.card-summary {
  font-size: var(--text-body);
  color: var(--ink-primary);
  line-height: 1.5;
  margin-bottom: var(--space-xs);
}

.card-details {
  font-size: var(--text-caption);
  line-height: 1.55;
  color: var(--ink-secondary);
  background-color: var(--bg-secondary);
  border-left: 2px solid var(--accent);
  padding: var(--space-xs) var(--space-sm);
  margin-bottom: var(--space-sm);
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: var(--space-sm);
}

.tag-pill {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  background-color: var(--bg-secondary);
  color: var(--ink-primary);
  padding: 2px 6px;
  border: 1px solid var(--border-color);
}

.card-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  border-top: 1px solid var(--border-color);
  background-color: var(--border-color);
  gap: 1px;
}

.card-links.single-link {
  grid-template-columns: 1fr;
}

.card-link {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  text-decoration: none;
  min-height: 44px;
  padding: var(--space-xs) var(--space-sm);
  text-align: center;
  color: var(--ink-primary);
  background-color: var(--bg-primary);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-link:hover {
  background-color: var(--ink-primary);
  color: var(--bg-primary);
}

/* --- Section 03: The Wrong Martin Davies (Shorts Gallery) --- */
.shorts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  border-left: 1px solid var(--border-color);
}

.short-card {
  background-color: var(--bg-card);
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  transition: outline var(--transition-fast);
}

.short-card.featured {
  outline: 2px solid var(--accent);
  position: relative;
  z-index: 2;
}

.featured-stage-ribbon {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--accent);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  padding: 6px var(--space-xs);
  text-align: center;
  letter-spacing: 0.05em;
  z-index: 3;
  pointer-events: none;
  border-bottom: 1px solid var(--border-color);
}

.featured-tag {
  display: inline-block;
  background-color: var(--accent);
  color: #FFFFFF;
  font-size: var(--text-caption);
  font-weight: 700;
  padding: 1px 6px;
  margin-left: 6px;
  letter-spacing: 0.05em;
  vertical-align: middle;
}

.short-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: var(--text-caption);
}

.short-index {
  font-weight: 700;
  color: var(--accent);
}

.short-date {
  color: var(--ink-secondary);
}

/* 9:16 Media Stage */
.stage-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 9 / 16;
  background-color: #000;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

.yt-facade {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #000;
  border: none;
  padding: 0;
  cursor: pointer;
  display: block;
  overflow: hidden;
  text-align: left;
}

.yt-facade img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.85);
  transition: transform 0.25s ease, filter 0.25s ease;
  display: block;
}

.yt-facade:hover img,
.yt-facade:focus img {
  filter: brightness(1);
  transform: scale(1.03);
}

/* Play Button Overlay */
.play-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  pointer-events: none;
}

.play-badge {
  background-color: var(--accent);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  padding: var(--space-xs) var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  border: 1px solid #000000;
  box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.8);
  letter-spacing: 0.05em;
}

.play-icon {
  font-size: var(--text-body);
}

.genre-tag {
  position: absolute;
  bottom: var(--space-xs);
  left: var(--space-xs);
  background-color: rgba(18, 18, 18, 0.9);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  padding: 4px var(--space-xs);
  border: 1px solid var(--accent);
  letter-spacing: 0.04em;
}

/* Submission Card (12th Card in Shorts Grid) */
.stage-wrapper.submission-stage {
  background-color: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

.submission-terminal {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-md);
  width: 100%;
  height: 100%;
}

.terminal-signal-circle {
  width: 64px;
  height: 64px;
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  background: rgba(255, 79, 0, 0.06);
}

.radar-dot {
  color: var(--accent);
  font-size: var(--text-header);
  line-height: 1;
}

.terminal-meta-tag {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-xs);
}

.terminal-callout {
  font-family: var(--font-sans);
  font-size: var(--text-header);
  font-weight: 800;
  color: var(--ink-primary);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.dispatch-submit-link {
  color: var(--accent);
}

.dispatch-submit-link:hover {
  color: var(--ink-primary);
}

.short-card-body {
  padding: var(--space-sm);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.short-title {
  font-size: var(--text-header);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-xs);
  letter-spacing: -0.02em;
}

.short-recipient {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  color: var(--ink-secondary);
  margin-bottom: var(--space-xs);
  line-height: 1.4;
  word-break: break-word;
}

.short-recipient strong {
  color: var(--ink-primary);
}

.short-blurb {
  font-size: var(--text-body);
  color: var(--ink-primary);
  line-height: 1.5;
  margin-bottom: var(--space-sm);
  flex: 1;
}

.short-footer {
  border-top: 1px solid var(--border-color);
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--bg-secondary);
}

.yt-fallback-link {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  color: var(--ink-primary);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition-fast);
}

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

/* --- Section 04: Spotify Playlists Grid --- */
.playlists-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  border-left: 1px solid var(--border-color);
}

.playlist-card {
  background-color: var(--bg-card);
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  transition: outline var(--transition-fast);
}

.playlist-card:hover {
  outline: 2px solid var(--accent);
  z-index: 2;
}

.playlist-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: var(--text-caption);
}

.playlist-cat {
  font-weight: 700;
  color: var(--accent);
}

.playlist-cover-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background-color: #000;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

.playlist-cover-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.15) contrast(1.05);
  transition: transform 0.25s ease, filter 0.25s ease;
  display: block;
}

.playlist-card:hover .playlist-cover-img {
  filter: grayscale(0) contrast(1);
  transform: scale(1.02);
}

.playlist-body {
  padding: var(--space-sm);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.playlist-genre {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.playlist-title {
  font-size: var(--text-header);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin-bottom: var(--space-xs);
  color: var(--ink-primary);
}

.playlist-desc {
  font-size: var(--text-body);
  color: var(--ink-secondary);
  line-height: 1.5;
  margin-bottom: var(--space-sm);
  flex: 1;
}

.playlist-footer {
  border-top: 1px solid var(--border-color);
}

.spotify-btn {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  text-decoration: none;
  min-height: 44px;
  padding: var(--space-xs) var(--space-sm);
  text-align: center;
  color: var(--ink-primary);
  background-color: var(--bg-primary);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.spotify-btn:hover {
  background-color: var(--ink-primary);
  color: var(--bg-primary);
}

/* --- Section 05: Contact & Dispatch Layout --- */
.split-grid.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
}

.split-grid > .grid-column:first-child {
  border-right: 1px solid var(--border-color);
  padding: var(--space-lg) var(--space-md);
}

.split-grid > .grid-column:last-child {
  padding: var(--space-lg) var(--space-md);
  background-color: var(--bg-secondary);
}

.terminal-panel {
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--ink-primary);
  color: var(--bg-primary);
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  letter-spacing: 0.05em;
}

.panel-header .mono-code {
  color: var(--accent);
}

.industrial-form {
  padding: var(--space-sm);
}

.form-group {
  margin-bottom: var(--space-sm);
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  color: var(--ink-secondary);
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}

.label-code {
  color: var(--accent);
  margin-right: 4px;
}

.form-input, .form-textarea {
  width: 100%;
  font-family: var(--font-sans);
  font-size: var(--text-body);
  min-height: 44px;
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--bg-primary);
  color: var(--ink-primary);
  border: 1px solid var(--border-color);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-footer {
  margin-top: var(--space-sm);
}

.btn {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: var(--space-xs) var(--space-md);
  border: 1px solid var(--border-color);
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: all var(--transition-fast);
}

.btn-primary {
  background-color: var(--ink-primary);
  color: var(--bg-primary);
}

.btn-primary:hover, .btn-primary:focus {
  background-color: var(--accent);
  color: var(--accent-contrast);
  border-color: var(--accent);
  box-shadow: 2px 2px 0 var(--border-color);
}

.submit-btn {
  width: 100%;
}

.form-status {
  margin-top: var(--space-sm);
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  padding: var(--space-xs) var(--space-sm);
  display: none;
  border: 1px solid transparent;
}

.form-status.active {
  display: block;
}

.form-status.status-sending {
  background-color: var(--bg-secondary);
  border-color: var(--accent);
  color: var(--accent);
}

.form-status.status-success {
  background-color: rgba(0, 143, 90, 0.1);
  border-color: var(--signal-ok);
  color: var(--signal-ok);
}

.form-status.status-error {
  background-color: rgba(217, 43, 43, 0.1);
  border-color: var(--signal-err);
  color: var(--signal-err);
}

/* Bluesky Card */
.dossier-card {
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
}

.dossier-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--ink-primary);
  color: var(--bg-primary);
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  letter-spacing: 0.05em;
}

.dossier-header .badge {
  color: var(--accent);
}

.bsky-card {
  margin-bottom: var(--space-md);
}

.bsky-body {
  padding: var(--space-md);
}

.platform-meta {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}

.bsky-handle {
  font-size: var(--text-header);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-xs);
}

.bsky-desc {
  font-size: var(--text-body);
  color: var(--ink-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.5;
}

.bsky-btn {
  width: 100%;
}

/* Notice Box */
.notice-box {
  padding: var(--space-sm);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent);
}

.notice-header {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 700;
  color: var(--accent);
}

.hazard-symbol {
  font-size: var(--text-body);
}

.notice-text {
  font-size: var(--text-body);
  line-height: 1.5;
  color: var(--ink-primary);
  margin-bottom: 6px;
}

.notice-sub {
  font-size: var(--text-caption);
  line-height: 1.45;
  color: var(--ink-secondary);
  font-family: var(--font-mono);
}

/* --- Chassis Footer --- */
.chassis-footer {
  display: grid;
  grid-template-columns: 2fr 1fr auto;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  background-color: var(--bg-secondary);
  border-top: 2px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  gap: var(--space-sm);
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-cat {
  font-weight: 700;
  color: var(--accent);
}

.footer-copy {
  color: var(--ink-secondary);
}

.footer-tech {
  color: var(--ink-secondary);
  text-align: center;
}

.back-to-top {
  font-weight: 700;
  color: var(--ink-primary);
  text-decoration: none;
  min-height: 44px;
  padding: 0 var(--space-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  transition: all var(--transition-fast);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.back-to-top:hover {
  background-color: var(--ink-primary);
  color: var(--bg-primary);
}

/* Loading & Empty States */
.loading-state {
  grid-column: 1 / -1;
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  color: var(--ink-secondary);
  background-color: var(--bg-card);
}

/* ==========================================================================
   Stage 5: Responsive Layout, Touch & Cross-Device Adaptation
   Tiers: Mobile (320px-639px), Tablet (640px-1023px), Desktop (1024px-1535px), Widescreen (1536px+)
   ========================================================================== */

/* Tablet & Mobile (< 1024px) */
@media (max-width: 1023px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
  .about-prose {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-md);
  }
  .about-specs {
    padding: var(--space-md);
  }
  .split-grid.contact-layout {
    grid-template-columns: 1fr;
  }
  .split-grid > .grid-column:first-child {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-md);
  }
  .split-grid > .grid-column:last-child {
    padding: var(--space-md);
  }
  .chassis-footer {
    grid-template-columns: 1fr;
    text-align: left;
  }
  .footer-tech {
    text-align: left;
  }
}

/* Mobile (< 640px) */
@media (max-width: 639px) {
  body {
    border-left: none;
    border-right: none;
  }
  .chassis-header {
    grid-template-columns: 1fr auto;
  }
  .chassis-id {
    flex-wrap: wrap;
    gap: 4px;
    padding: var(--space-xs);
  }
  .site-title {
    white-space: normal;
    display: inline;
    line-height: 1.25;
    font-size: var(--text-caption);
  }
  .chassis-nav {
    grid-column: 1 / -1;
    border-top: 1px solid var(--border-color);
    padding: 0 var(--space-xs);
    gap: var(--space-xs);
  }
  .section-intro {
    padding: var(--space-sm);
  }
  .section-header {
    padding: var(--space-xs) var(--space-sm);
  }
  .about-prose,
  .about-specs,
  .split-grid > .grid-column:first-child,
  .split-grid > .grid-column:last-child {
    padding: var(--space-sm);
  }
  .card-content {
    padding: var(--space-xs);
  }
  .card-links {
    grid-template-columns: 1fr;
  }
  .card-link {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  .card-link:last-child {
    border-bottom: none;
  }
}

/* Extra small mobile (< 480px) */
@media (max-width: 480px) {
  .theme-prefix {
    display: none;
  }
}

/* Widescreen (>= 1536px) */
@media (min-width: 1536px) {
  body {
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.05);
  }
}