/* ============================================================
   DUZ Urban Systems — Design System
   Tactical · Cyberpunk · Industrial Minimalist
   ============================================================
   Version: 1.0.0
   Last updated: 2026-05-17
   ============================================================ */

/* ------------------------------------------------------------
   1. CUSTOM PROPERTIES (Design Tokens)
   ------------------------------------------------------------ */

:root {
  /* --- Raw Palette --- */
  --duz-black: #0a0a0a;
  --duz-graphite: #1a1a1a;
  --duz-gunmetal: #2d2d2d;
  --duz-titanium: #8a8a8a;
  --duz-steel: #4a4a4a;
  --duz-accent: #00d4ff;
  --duz-accent-dim: #0088aa;
  --duz-white: #f0f0f0;
  --duz-muted: #6a6a6a;
  --duz-alert: #ff3b30;
  --duz-success: #34c759;
  --duz-warning: #ff9f0a;

  /* --- Semantic Tokens --- */
  --duz-bg-primary: var(--duz-black);
  --duz-bg-secondary: var(--duz-graphite);
  --duz-bg-tertiary: var(--duz-gunmetal);
  --duz-bg-elevated: #222;
  --duz-bg-overlay: rgba(10, 10, 10, 0.92);
  --duz-bg-card: #1e1e1e;

  --duz-text-primary: var(--duz-white);
  --duz-text-secondary: #c0c0c0;
  --duz-text-muted: var(--duz-muted);
  --duz-text-accent: var(--duz-accent);
  --duz-text-inverse: var(--duz-black);

  --duz-border-primary: var(--duz-gunmetal);
  --duz-border-subtle: #333;
  --duz-border-accent: var(--duz-accent-dim);
  --duz-border-active: var(--duz-accent);

  —duz-accent-glow: 0 0 12px rgba(0, 212, 255, 0.25);
  --duz-accent-glow-strong: 0 0 20px rgba(0, 212, 255, 0.4);

  /* --- Typography Scale --- */
  --duz-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
    Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', Arial, sans-serif;
  --duz-font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Cascadia Code',
    'Consolas', 'Liberation Mono', Menlo, monospace;
  --duz-font-display: 'Inter', 'SF Pro Display', -apple-system,
    BlinkMacSystemFont, sans-serif;

  --duz-text-xs: 0.75rem;
  --duz-text-sm: 0.8125rem;
  --duz-text-base: 0.9375rem;
  --duz-text-lg: 1.125rem;
  --duz-text-xl: 1.375rem;
  --duz-text-2xl: 1.75rem;
  --duz-text-3xl: 2.25rem;
  --duz-text-4xl: 3rem;
  --duz-text-5xl: 4rem;

  --duz-leading-tight: 1.15;
  --duz-leading-normal: 1.5;
  --duz-leading-relaxed: 1.7;

  --duz-tracking-tight: -0.02em;
  --duz-tracking-normal: 0;
  --duz-tracking-wider: 0.06em;
  --duz-tracking-wide: 0.12em;

  --duz-font-weight-regular: 400;
  --duz-font-weight-medium: 500;
  --duz-font-weight-semibold: 600;
  --duz-font-weight-bold: 700;
  --duz-font-weight-mono-regular: 350;

  /* --- Spacing Scale --- */
  --duz-space-1: 4px;
  --duz-space-2: 8px;
  --duz-space-3: 12px;
  --duz-space-4: 16px;
  --duz-space-5: 20px;
  --duz-space-6: 24px;
  --duz-space-8: 32px;
  --duz-space-10: 40px;
  --duz-space-12: 48px;
  --duz-space-16: 64px;
  --duz-space-20: 80px;
  --duz-space-24: 96px;

  /* --- Grid / Layout --- */
  --duz-max-width: 1280px;
  --duz-grid-gap: var(--duz-space-6);
  --duz-grid-gap-sm: var(--duz-space-4);
  --duz-section-padding: var(--duz-space-20) 0;
  --duz-content-padding: var(--duz-space-6);

  /* --- Borders & Radius --- */
  --duz-radius-none: 0;
  --duz-radius-sm: 2px;
  --duz-radius-md: 4px;
  --duz-radius-lg: 6px;
  --duz-radius-xl: 8px;
  --duz-radius-full: 9999px;

  --duz-border-width: 1px;
  --duz-border-width-focus: 2px;

  /* --- Shadows --- */
  --duz-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.5);
  --duz-shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.5);
  --duz-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.6);
  --duz-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.7);
  --duz-shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.8);
  --duz-shadow-inner: inset 0 1px 2px rgba(0, 0, 0, 0.4);
  --duz-shadow-glow: var(--duz-accent-glow);

  /* --- Transitions --- */
  --duz-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --duz-transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --duz-transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* --- Z-Index Scale --- */
  --duz-z-dropdown: 100;
  --duz-z-sticky: 200;
  --duz-z-overlay: 300;
  --duz-z-modal: 400;
  --duz-z-toast: 500;
}


/* ------------------------------------------------------------
   2. BASE / RESET
   ------------------------------------------------------------ */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--duz-font-sans);
  font-size: var(--duz-text-base);
  font-weight: var(--duz-font-weight-regular);
  line-height: var(--duz-leading-normal);
  background-color: var(--duz-bg-primary);
  color: var(--duz-text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duz-transition-fast);
}

a:focus-visible {
  outline: var(--duz-border-width-focus) solid var(--duz-accent);
  outline-offset: 2px;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  font: inherit;
  color: inherit;
  border: none;
  background: none;
}

input, textarea, select {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: var(--duz-border-width-focus) solid var(--duz-accent);
  outline-offset: 2px;
}

::selection {
  background: var(--duz-accent);
  color: var(--duz-black);
}

::-moz-selection {
  background: var(--duz-accent);
  color: var(--duz-black);
}


/* ------------------------------------------------------------
   3. DARK MODE (native — already dark, with override support)
   ------------------------------------------------------------ */

/* The entire system is dark-first. The .duz-light override
   exists for embedded content that needs a lighter treatment. */

.duz-light {
  --duz-bg-primary: #f5f5f5;
  --duz-bg-secondary: #e8e8e8;
  --duz-bg-tertiary: #d4d4d4;
  --duz-bg-card: #ffffff;
  --duz-text-primary: #111;
  --duz-text-secondary: #444;
  --duz-text-muted: #888;
  --duz-border-primary: #ccc;
  --duz-border-subtle: #ddd;
  --duz-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.08);
  --duz-shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --duz-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
  --duz-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* Respect user OS preference for light mode */
@media (prefers-color-scheme: light) {
  .duz-auto-light {
    --duz-bg-primary: #f5f5f5;
    --duz-bg-secondary: #e8e8e8;
    --duz-bg-tertiary: #d4d4d4;
    --duz-bg-card: #ffffff;
    --duz-text-primary: #111;
    --duz-text-secondary: #444;
    --duz-text-muted: #888;
    --duz-border-primary: #ccc;
    --duz-border-subtle: #ddd;
    --duz-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.08);
    --duz-shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --duz-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
    --duz-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
  }
}


/* ------------------------------------------------------------
   4. RESPONSIVE GRID SYSTEM
   ------------------------------------------------------------ */

.duz-container {
  width: 100%;
  max-width: var(--duz-max-width);
  margin: 0 auto;
  padding-left: var(--duz-content-padding);
  padding-right: var(--duz-content-padding);
}

.duz-container--narrow {
  max-width: 860px;
}

.duz-container--wide {
  max-width: 1440px;
}

.duz-container--flush {
  padding-left: 0;
  padding-right: 0;
}

/* --- Grid Base --- */
.duz-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--duz-grid-gap);
}

.duz-grid--gap-sm {
  gap: var(--duz-grid-gap-sm);
}

.duz-grid--gap-lg {
  gap: var(--duz-space-8);
}

.duz-grid--gap-xl {
  gap: var(--duz-space-12);
}

/* --- Grid Columns (responsive) --- */

.duz-col-1  { grid-column: span 1; }
.duz-col-2  { grid-column: span 2; }
.duz-col-3  { grid-column: span 3; }
.duz-col-4  { grid-column: span 4; }
.duz-col-5  { grid-column: span 5; }
.duz-col-6  { grid-column: span 6; }
.duz-col-7  { grid-column: span 7; }
.duz-col-8  { grid-column: span 8; }
.duz-col-9  { grid-column: span 9; }
.duz-col-10 { grid-column: span 10; }
.duz-col-11 { grid-column: span 11; }
.duz-col-12 { grid-column: span 12; }

/* --- Responsive Breakpoints --- */

/* Tablet: 768px–1023px */
@media (max-width: 1023px) {
  .duz-grid--tablet {
    grid-template-columns: repeat(6, 1fr);
  }
  .duz-col-md-1  { grid-column: span 1; }
  .duz-col-md-2  { grid-column: span 2; }
  .duz-col-md-3  { grid-column: span 3; }
  .duz-col-md-4  { grid-column: span 4; }
  .duz-col-md-5  { grid-column: span 5; }
  .duz-col-md-6  { grid-column: span 6; }
  .duz-col-md-12 { grid-column: span 6; }
}

/* Mobile: <768px */
@media (max-width: 767px) {
  .duz-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--duz-grid-gap-sm);
  }
  .duz-col-sm-1  { grid-column: span 1; }
  .duz-col-sm-2  { grid-column: span 2; }
  .duz-col-sm-3  { grid-column: span 3; }
  .duz-col-sm-4  { grid-column: span 4; }

  /* Default: stacked on mobile */
  .duz-col-1,  .duz-col-2,  .duz-col-3,
  .duz-col-4,  .duz-col-5,  .duz-col-6,
  .duz-col-7,  .duz-col-8,  .duz-col-9,
  .duz-col-10, .duz-col-11, .duz-col-12 {
    grid-column: span 4;
  }

  .duz-container {
    --duz-content-padding: var(--duz-space-4);
  }
}

/* --- Auto-fit/masonry-style grid --- */
.duz-grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--duz-grid-gap);
}

.duz-grid-auto--tight {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--duz-grid-gap-sm);
}

.duz-grid-auto--wide {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}


/* --- Flex Helpers --- */
.duz-row {
  display: flex;
  flex-wrap: wrap;
}

.duz-row--center { align-items: center; }
.duz-row--between { justify-content: space-between; }
.duz-row--around { justify-content: space-around; }
.duz-row--end { justify-content: flex-end; }
.duz-row--top { align-items: flex-start; }
.duz-row--bottom { align-items: flex-end; }
.duz-row--wrap { flex-wrap: wrap; }
.duz-row--nowrap { flex-wrap: nowrap; }

.duz-gap-1  { gap: var(--duz-space-1); }
.duz-gap-2  { gap: var(--duz-space-2); }
.duz-gap-3  { gap: var(--duz-space-3); }
.duz-gap-4  { gap: var(--duz-space-4); }
.duz-gap-6  { gap: var(--duz-space-6); }
.duz-gap-8  { gap: var(--duz-space-8); }
.duz-gap-12 { gap: var(--duz-space-12); }


/* ------------------------------------------------------------
   5. TYPOGRAPHY
   ------------------------------------------------------------ */

/* --- Display / Headings --- */
.duz-display-xl {
  font-family: var(--duz-font-display);
  font-size: var(--duz-text-5xl);
  font-weight: var(--duz-font-weight-bold);
  line-height: var(--duz-leading-tight);
  letter-spacing: var(--duz-tracking-tight);
  text-transform: uppercase;
}

.duz-display-lg {
  font-family: var(--duz-font-display);
  font-size: var(--duz-text-4xl);
  font-weight: var(--duz-font-weight-bold);
  line-height: var(--duz-leading-tight);
  letter-spacing: var(--duz-tracking-tight);
  text-transform: uppercase;
}

.duz-heading-1 {
  font-family: var(--duz-font-display);
  font-size: var(--duz-text-3xl);
  font-weight: var(--duz-font-weight-semibold);
  line-height: var(--duz-leading-tight);
  letter-spacing: var(--duz-tracking-tight);
}

.duz-heading-2 {
  font-family: var(--duz-font-display);
  font-size: var(--duz-text-2xl);
  font-weight: var(--duz-font-weight-semibold);
  line-height: var(--duz-leading-tight);
  letter-spacing: var(--duz-tracking-tight);
  text-transform: uppercase;
}

.duz-heading-3 {
  font-family: var(--duz-font-display);
  font-size: var(--duz-text-xl);
  font-weight: var(--duz-font-weight-semibold);
  line-height: var(--duz-leading-tight);
  text-transform: uppercase;
  letter-spacing: var(--duz-tracking-wider);
}

.duz-heading-4 {
  font-family: var(--duz-font-display);
  font-size: var(--duz-text-lg);
  font-weight: var(--duz-font-weight-medium);
  line-height: var(--duz-leading-tight);
  text-transform: uppercase;
  letter-spacing: var(--duz-tracking-wider);
}

.duz-subhead {
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-sm);
  font-weight: var(--duz-font-weight-mono-regular);
  letter-spacing: var(--duz-tracking-wide);
  text-transform: uppercase;
  color: var(--duz-text-accent);
}

.duz-subhead::before {
  content: '// ';
  opacity: 0.6;
}

/* --- Body Text --- */
.duz-body-lg {
  font-size: var(--duz-text-lg);
  line-height: var(--duz-leading-relaxed);
  color: var(--duz-text-secondary);
}

.duz-body {
  font-size: var(--duz-text-base);
  line-height: var(--duz-leading-normal);
  color: var(--duz-text-secondary);
}

.duz-body-sm {
  font-size: var(--duz-text-sm);
  line-height: var(--duz-leading-normal);
  color: var(--duz-text-muted);
}

/* --- Monospace / Technical --- */
.duz-mono {
  font-family: var(--duz-font-mono);
  font-weight: var(--duz-font-weight-mono-regular);
}

.duz-mono-sm {
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-sm);
  font-weight: var(--duz-font-weight-mono-regular);
  letter-spacing: var(--duz-tracking-wider);
}

.duz-tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--duz-font-mono);
  font-size: 0.6875rem;
  font-weight: var(--duz-font-weight-mono-regular);
  letter-spacing: var(--duz-tracking-wide);
  text-transform: uppercase;
  padding: 2px 8px;
  border: var(--duz-border-width) solid var(--duz-border-subtle);
  color: var(--duz-text-muted);
}

.duz-label {
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-xs);
  letter-spacing: var(--duz-tracking-wide);
  text-transform: uppercase;
  color: var(--duz-text-muted);
}

.duz-price {
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-xl);
  font-weight: var(--duz-font-weight-medium);
  letter-spacing: var(--duz-tracking-normal);
}

.duz-price--sale {
  color: var(--duz-alert);
}

.duz-price--original {
  font-size: var(--duz-text-base);
  color: var(--duz-text-muted);
  text-decoration: line-through;
  margin-left: var(--duz-space-2);
}

/* --- Section Heading Block (common pattern) --- */
.duz-section-heading {
  text-align: center;
  margin-bottom: var(--duz-space-12);
}

.duz-section-heading .duz-subhead {
  display: block;
  margin-bottom: var(--duz-space-3);
}

.duz-section-heading h2 {
  margin-bottom: var(--duz-space-4);
}

.duz-section-heading p {
  max-width: 540px;
  margin: 0 auto;
}

/* --- Responsive Typography --- */
@media (max-width: 1023px) {
  .duz-display-xl { font-size: 3rem; }
  .duz-display-lg { font-size: 2.5rem; }
  .duz-heading-1 { font-size: 1.75rem; }
  .duz-heading-2 { font-size: 1.5rem; }
}

@media (max-width: 767px) {
  .duz-display-xl { font-size: 2.25rem; }
  .duz-display-lg { font-size: 1.875rem; }
  .duz-heading-1 { font-size: 1.5rem; }
  .duz-heading-2 { font-size: 1.25rem; }
  .duz-heading-3 { font-size: var(--duz-text-lg); }
}


/* ------------------------------------------------------------
   6. TACTICAL BUTTON STYLES
   ------------------------------------------------------------ */

.duz-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--duz-space-2);
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-sm);
  font-weight: var(--duz-font-weight-medium);
  letter-spacing: var(--duz-tracking-wide);
  text-transform: uppercase;
  text-decoration: none;
  line-height: 1;
  white-space: nowrap;
  border: var(--duz-border-width) solid transparent;
  border-radius: var(--duz-radius-md);
  cursor: pointer;
  user-select: none;
  transition:
    background var(--duz-transition-fast),
    color var(--duz-transition-fast),
    border-color var(--duz-transition-fast),
    box-shadow var(--duz-transition-fast),
    transform var(--duz-transition-fast);
  position: relative;
  overflow: hidden;
}

.duz-btn:focus-visible {
  outline: var(--duz-border-width-focus) solid var(--duz-accent);
  outline-offset: 2px;
}

.duz-btn:active {
  transform: scale(0.97);
}

/* --- Button Sizes --- */
.duz-btn--sm {
  padding: 6px 14px;
  font-size: 0.6875rem;
}

.duz-btn--md {
  padding: 10px 24px;
  font-size: var(--duz-text-sm);
}

.duz-btn--lg {
  padding: 14px 32px;
  font-size: var(--duz-text-base);
}

.duz-btn--xl {
  padding: 18px 40px;
  font-size: var(--duz-text-lg);
  letter-spacing: var(--duz-tracking-wider);
}

/* --- Primary (Solid Accent) --- */
.duz-btn--primary {
  background: var(--duz-accent);
  color: var(--duz-black);
  border-color: var(--duz-accent);
}

.duz-btn--primary:hover {
  background: transparent;
  color: var(--duz-accent);
  box-shadow: var(--duz-accent-glow), inset 0 0 0 var(--duz-border-width) var(--duz-accent);
}

.duz-btn--primary:active {
  box-shadow: var(--duz-accent-glow-strong);
}

/* --- Secondary (Outlined) --- */
.duz-btn--secondary {
  background: transparent;
  color: var(--duz-text-primary);
  border-color: var(--duz-border-primary);
}

.duz-btn--secondary:hover {
  border-color: var(--duz-accent);
  color: var(--duz-accent);
  box-shadow: var(--duz-accent-glow);
}

/* --- Ghost (Minimal) --- */
.duz-btn--ghost {
  background: transparent;
  color: var(--duz-text-muted);
  border-color: transparent;
}

.duz-btn--ghost:hover {
  color: var(--duz-text-primary);
  background: rgba(255, 255, 255, 0.04);
}

/* --- Danger --- */
.duz-btn--danger {
  background: transparent;
  color: var(--duz-alert);
  border-color: var(--duz-alert);
}

.duz-btn--danger:hover {
  background: var(--duz-alert);
  color: var(--duz-black);
}

/* --- Full Width --- */
.duz-btn--block {
  display: flex;
  width: 100%;
}

/* --- Disabled --- */
.duz-btn:disabled,
.duz-btn--disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}

/* --- Glitch Hover Effect (Primary Only) --- */
.duz-btn--glitch {
  position: relative;
}

.duz-btn--glitch::before,
.duz-btn--glitch::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--duz-transition-fast);
}

.duz-btn--glitch::before {
  background: rgba(0, 212, 255, 0.08);
  transform: translate(-2px, 1px);
}

.duz-btn--glitch::after {
  background: rgba(0, 212, 255, 0.04);
  transform: translate(2px, -1px);
}

.duz-btn--glitch:hover::before {
  opacity: 1;
  animation: duz-glitch-btn-before 0.3s ease-in-out;
}

.duz-btn--glitch:hover::after {
  opacity: 1;
  animation: duz-glitch-btn-after 0.3s ease-in-out 0.05s;
}

/* --- Button Icon --- */
.duz-btn svg,
.duz-btn img {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.duz-btn--lg svg,
.duz-btn--lg img {
  width: 20px;
  height: 20px;
}

/* --- Back to top / icon buttons --- */
.duz-btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: var(--duz-border-width) solid var(--duz-border-primary);
  border-radius: var(--duz-radius-md);
  background: transparent;
  color: var(--duz-text-muted);
  transition: all var(--duz-transition-fast);
  cursor: pointer;
}

.duz-btn-icon:hover {
  border-color: var(--duz-accent);
  color: var(--duz-accent);
  box-shadow: var(--duz-accent-glow);
}


/* ------------------------------------------------------------
   7. NAVIGATION STYLES
   ------------------------------------------------------------ */

/* --- Primary Nav Bar --- */
.duz-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--duz-z-sticky);
  background: var(--duz-bg-overlay);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: var(--duz-border-width) solid var(--duz-border-subtle);
  transition: border-color var(--duz-transition-base);
}

.duz-nav--scrolled {
  border-bottom-color: var(--duz-border-primary);
  background: rgba(10, 10, 10, 0.96);
}

.duz-nav .duz-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

/* --- Nav Logo --- */
.duz-nav-logo {
  display: flex;
  align-items: center;
  gap: var(--duz-space-3);
  font-family: var(--duz-font-display);
  font-size: var(--duz-text-xl);
  font-weight: var(--duz-font-weight-bold);
  letter-spacing: var(--duz-tracking-wider);
  text-transform: uppercase;
  color: var(--duz-text-primary);
  text-decoration: none;
  flex-shrink: 0;
}

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

/* --- Nav Links (Desktop) --- */
.duz-nav-links {
  display: flex;
  align-items: center;
  gap: var(--duz-space-1);
}

.duz-nav-link {
  position: relative;
  padding: var(--duz-space-2) var(--duz-space-3);
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-sm);
  font-weight: var(--duz-font-weight-mono-regular);
  letter-spacing: var(--duz-tracking-wide);
  text-transform: uppercase;
  color: var(--duz-text-muted);
  text-decoration: none;
  border-radius: var(--duz-radius-md);
  transition: color var(--duz-transition-fast), background var(--duz-transition-fast);
}

.duz-nav-link:hover {
  color: var(--duz-text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.duz-nav-link--active {
  color: var(--duz-accent);
}

.duz-nav-link--active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: var(--duz-space-3);
  right: var(--duz-space-3);
  height: 1px;
  background: var(--duz-accent);
  box-shadow: var(--duz-accent-glow);
}

/* --- Nav Actions (cart, search, etc.) --- */
.duz-nav-actions {
  display: flex;
  align-items: center;
  gap: var(--duz-space-2);
}

.duz-nav-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--duz-radius-md);
  color: var(--duz-text-muted);
  transition: all var(--duz-transition-fast);
  position: relative;
}

.duz-nav-action-btn:hover {
  color: var(--duz-text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.duz-nav-action-btn .duz-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  font-family: var(--duz-font-mono);
  font-size: 0.625rem;
  font-weight: var(--duz-font-weight-medium);
  line-height: 16px;
  text-align: center;
  border-radius: var(--duz-radius-full);
  background: var(--duz-accent);
  color: var(--duz-black);
}

/* --- Mobile Menu Toggle --- */
.duz-nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--duz-text-primary);
  padding: 0;
}

.duz-nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  position: relative;
  transition: background var(--duz-transition-fast);
}

.duz-nav-toggle-bar::before,
.duz-nav-toggle-bar::after {
  content: '';
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  position: absolute;
  left: 0;
  transition: transform var(--duz-transition-base);
}

.duz-nav-toggle-bar::before { top: -6px; }
.duz-nav-toggle-bar::after { top: 6px; }

.duz-nav-toggle--open .duz-nav-toggle-bar {
  background: transparent;
}

.duz-nav-toggle--open .duz-nav-toggle-bar::before {
  transform: translateY(6px) rotate(45deg);
}

.duz-nav-toggle--open .duz-nav-toggle-bar::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* --- Mobile Menu Panel --- */
.duz-nav-mobile {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--duz-bg-overlay);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: calc(var(--duz-z-sticky) - 1);
  padding: var(--duz-space-8) var(--duz-space-6);
  overflow-y: auto;
  opacity: 0;
  transform: translateY(-8px);
  visibility: hidden;
  transition: opacity var(--duz-transition-base), transform var(--duz-transition-base), visibility var(--duz-transition-base);
}

.duz-nav-mobile--open {
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
}

.duz-nav-mobile .duz-nav-link {
  display: block;
  padding: var(--duz-space-4) 0;
  font-size: var(--duz-text-lg);
  border-bottom: var(--duz-border-width) solid var(--duz-border-subtle);
}

/* --- Mobile Responsive --- */
@media (max-width: 767px) {
  .duz-nav-links {
    display: none;
  }

  .duz-nav-toggle {
    display: flex;
  }

  .duz-nav-mobile {
    display: block;
  }
}

/* --- Secondary / Breadcrumb Nav --- */
.duz-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--duz-space-2);
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-xs);
  letter-spacing: var(--duz-tracking-wide);
  text-transform: uppercase;
  color: var(--duz-text-muted);
  padding: var(--duz-space-4) 0;
}

.duz-breadcrumb a {
  color: var(--duz-text-muted);
  transition: color var(--duz-transition-fast);
}

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

.duz-breadcrumb-sep {
  color: var(--duz-text-muted);
  opacity: 0.4;
}

.duz-breadcrumb-current {
  color: var(--duz-text-primary);
}


/* ------------------------------------------------------------
   8. PRODUCT CARD LAYOUTS
   ------------------------------------------------------------ */

.duz-product-card {
  display: flex;
  flex-direction: column;
  background: var(--duz-bg-card);
  border: var(--duz-border-width) solid var(--duz-border-subtle);
  border-radius: var(--duz-radius-lg);
  overflow: hidden;
  transition:
    border-color var(--duz-transition-base),
    box-shadow var(--duz-transition-base),
    transform var(--duz-transition-base);
  position: relative;
}

.duz-product-card:hover {
  border-color: var(--duz-border-accent);
  box-shadow: var(--duz-shadow-md), var(--duz-accent-glow);
  transform: translateY(-2px);
}

/* --- Product Image Container --- */
.duz-product-image {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: var(--duz-bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.duz-product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duz-transition-slow);
}

.duz-product-card:hover .duz-product-image img {
  transform: scale(1.04);
}

/* --- Product Badges --- */
.duz-product-badge {
  position: absolute;
  top: var(--duz-space-3);
  left: var(--duz-space-3);
  font-family: var(--duz-font-mono);
  font-size: 0.6875rem;
  font-weight: var(--duz-font-weight-medium);
  letter-spacing: var(--duz-tracking-wide);
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: var(--duz-radius-sm);
  pointer-events: none;
}

.duz-product-badge--new {
  background: var(--duz-accent);
  color: var(--duz-black);
}

.duz-product-badge--sale {
  background: var(--duz-alert);
  color: var(--duz-black);
}

.duz-product-badge--soldout {
  background: var(--duz-bg-tertiary);
  color: var(--duz-text-muted);
}

/* --- Product Quick Actions (hover overlay) --- */
.duz-product-actions {
  position: absolute;
  right: var(--duz-space-2);
  top: var(--duz-space-2);
  display: flex;
  flex-direction: column;
  gap: var(--duz-space-1);
  opacity: 0;
  transform: translateX(8px);
  transition: opacity var(--duz-transition-fast), transform var(--duz-transition-fast);
}

.duz-product-card:hover .duz-product-actions {
  opacity: 1;
  transform: translateX(0);
}

.duz-product-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--duz-bg-overlay);
  border: var(--duz-border-width) solid var(--duz-border-subtle);
  border-radius: var(--duz-radius-md);
  color: var(--duz-text-secondary);
  backdrop-filter: blur(8px);
  transition: all var(--duz-transition-fast);
  cursor: pointer;
}

.duz-product-action-btn:hover {
  color: var(--duz-accent);
  border-color: var(--duz-accent);
  box-shadow: var(--duz-accent-glow);
}

/* --- Product Info --- */
.duz-product-info {
  padding: var(--duz-space-4);
  display: flex;
  flex-direction: column;
  gap: var(--duz-space-1);
  flex: 1;
}

.duz-product-category {
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-xs);
  letter-spacing: var(--duz-tracking-wide);
  text-transform: uppercase;
  color: var(--duz-text-muted);
}

.duz-product-name {
  font-family: var(--duz-font-sans);
  font-size: var(--duz-text-base);
  font-weight: var(--duz-font-weight-medium);
  color: var(--duz-text-primary);
  line-height: var(--duz-leading-tight);
  transition: color var(--duz-transition-fast);
}

.duz-product-card:hover .duz-product-name {
  color: var(--duz-accent);
}

.duz-product-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: var(--duz-space-3);
}

.duz-product-card .duz-btn {
  opacity: 0;
  transform: translateY(4px);
  transition:
    opacity var(--duz-transition-base),
    transform var(--duz-transition-base),
    background var(--duz-transition-fast),
    color var(--duz-transition-fast),
    border-color var(--duz-transition-fast);
}

.duz-product-card:hover .duz-btn {
  opacity: 1;
  transform: translateY(0);
}

/* --- Quick-add from card --- */
.duz-product-card .duz-btn--sm {
  transition-delay: 0.05s;
}

/* --- Compact Card Variant --- */
.duz-product-card--compact {
  flex-direction: row;
  align-items: center;
  gap: var(--duz-space-4);
  padding: var(--duz-space-3);
}

.duz-product-card--compact .duz-product-image {
  width: 80px;
  height: 80px;
  aspect-ratio: auto;
  border-radius: var(--duz-radius-sm);
  flex-shrink: 0;
}

.duz-product-card--compact .duz-product-info {
  padding: 0;
}

.duz-product-card--compact .duz-product-footer {
  padding-top: var(--duz-space-1);
}

.duz-product-card--compact .duz-btn {
  opacity: 1;
  transform: none;
}


/* ------------------------------------------------------------
   9. LOADING ANIMATIONS
   ------------------------------------------------------------ */

/* --- Spinner --- */
.duz-spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 2px solid var(--duz-border-primary);
  border-top-color: var(--duz-accent);
  border-radius: var(--duz-radius-full);
  animation: duz-spin 0.7s linear infinite;
}

.duz-spinner--sm {
  width: 16px;
  height: 16px;
  border-width: 1.5px;
}

.duz-spinner--lg {
  width: 40px;
  height: 40px;
  border-width: 3px;
}

.duz-spinner--center {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--duz-space-12) 0;
}

/* --- Pulse Dot --- */
.duz-pulse {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.duz-pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--duz-radius-full);
  background: var(--duz-text-muted);
  animation: duz-pulse-dot 1.4s ease-in-out infinite both;
}

.duz-pulse-dot:nth-child(1) { animation-delay: 0s; }
.duz-pulse-dot:nth-child(2) { animation-delay: 0.16s; }
.duz-pulse-dot:nth-child(3) { animation-delay: 0.32s; }

/* --- Skeleton / Shimmer --- */
.duz-skeleton {
  background: linear-gradient(
    90deg,
    var(--duz-bg-tertiary) 25%,
    var(--duz-bg-elevated) 37%,
    var(--duz-bg-tertiary) 63%
  );
  background-size: 400% 100%;
  animation: duz-shimmer 1.8s ease-in-out infinite;
  border-radius: var(--duz-radius-sm);
}

.duz-skeleton--text {
  height: 14px;
  width: 100%;
  margin-bottom: var(--duz-space-2);
}

.duz-skeleton--text:last-child {
  width: 60%;
}

.duz-skeleton--heading {
  height: 24px;
  width: 70%;
  margin-bottom: var(--duz-space-3);
}

.duz-skeleton--image {
  aspect-ratio: 3 / 4;
  width: 100%;
}

.duz-skeleton--avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--duz-radius-full);
}

.duz-skeleton--button {
  height: 40px;
  width: 120px;
}

/* --- Page Loader (full screen) --- */
.duz-page-loader {
  position: fixed;
  inset: 0;
  z-index: var(--duz-z-toast);
  background: var(--duz-bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--duz-space-6);
  transition: opacity var(--duz-transition-slow), visibility var(--duz-transition-slow);
}

.duz-page-loader--hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.duz-page-loader-label {
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-xs);
  letter-spacing: var(--duz-tracking-wide);
  text-transform: uppercase;
  color: var(--duz-text-muted);
  animation: duz-blink 1.4s ease-in-out infinite;
}

/* --- Scanline loading bar --- */
.duz-loading-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: var(--duz-z-toast);
  background: transparent;
  overflow: hidden;
}

.duz-loading-bar::before {
  content: '';
  display: block;
  height: 100%;
  width: 40%;
  background: var(--duz-accent);
  animation: duz-loading-bar 1.2s ease-in-out infinite;
  box-shadow: var(--duz-accent-glow);
}

/* --- Keyframes --- */
@keyframes duz-spin {
  to { transform: rotate(360deg); }
}

@keyframes duz-pulse-dot {
  0%, 80%, 100% {
    transform: scale(0.6);
    opacity: 0.4;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes duz-shimmer {
  0% { background-position: 100% 50%; }
  100% { background-position: 0 50%; }
}

@keyframes duz-blink {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

@keyframes duz-loading-bar {
  0% { left: -40%; }
  50% { left: 40%; }
  100% { left: 100%; }
}

@keyframes duz-glitch-btn-before {
  0%   { transform: translate(0, 0); opacity: 0.3; }
  25%  { transform: translate(-3px, 2px); opacity: 0.6; }
  50%  { transform: translate(2px, -1px); opacity: 0.4; }
  75%  { transform: translate(-1px, 1px); opacity: 0.5; }
  100% { transform: translate(-2px, 1px); opacity: 0; }
}

@keyframes duz-glitch-btn-after {
  0%   { transform: translate(0, 0); opacity: 0.2; }
  20%  { transform: translate(3px, -2px); opacity: 0.5; }
  45%  { transform: translate(-2px, 1px); opacity: 0.3; }
  70%  { transform: translate(1px, -1px); opacity: 0.4; }
  100% { transform: translate(2px, -1px); opacity: 0; }
}


/* ------------------------------------------------------------
   10. HOVER STATES WITH GLITCH EFFECTS
   ------------------------------------------------------------ */

/* --- Glitch Text --- */
.duz-glitch {
  position: relative;
  display: inline-block;
}

.duz-glitch::before,
.duz-glitch::after {
  content: attr(data-duz-glitch);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0;
  clip-path: inset(0);
}

.duz-glitch::before {
  color: var(--duz-accent);
  z-index: -1;
}

.duz-glitch::after {
  color: var(--duz-alert);
  z-index: -2;
}

.duz-glitch:hover::before {
  opacity: 0.7;
  animation: duz-glitch-text-top 0.4s ease-in-out;
}

.duz-glitch:hover::after {
  opacity: 0.5;
  animation: duz-glitch-text-bottom 0.4s ease-in-out 0.05s;
}

@keyframes duz-glitch-text-top {
  0%   { clip-path: inset(0 0 80% 0); transform: translate(-2px, -1px); }
  15%  { clip-path: inset(20% 0 60% 0); transform: translate(2px, 1px); }
  30%  { clip-path: inset(40% 0 40% 0); transform: translate(-1px, -2px); }
  50%  { clip-path: inset(60% 0 20% 0); transform: translate(1px, 0); }
  70%  { clip-path: inset(10% 0 70% 0); transform: translate(-2px, 1px); }
  85%  { clip-path: inset(50% 0 30% 0); transform: translate(2px, -1px); }
  100% { clip-path: inset(0 0 80% 0); opacity: 0; }
}

@keyframes duz-glitch-text-bottom {
  0%   { clip-path: inset(80% 0 0 0); transform: translate(2px, 1px); }
  15%  { clip-path: inset(60% 0 20% 0); transform: translate(-2px, -1px); }
  30%  { clip-path: inset(40% 0 40% 0); transform: translate(1px, 2px); }
  50%  { clip-path: inset(20% 0 60% 0); transform: translate(-1px, 0); }
  70%  { clip-path: inset(70% 0 10% 0); transform: translate(2px, -1px); }
  85%  { clip-path: inset(30% 0 50% 0); transform: translate(-2px, 1px); }
  100% { clip-path: inset(80% 0 0 0); opacity: 0; }
}

/* --- Image Glitch Hover --- */
.duz-glitch-image {
  position: relative;
  overflow: hidden;
}

.duz-glitch-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    transparent 40%,
    rgba(0, 212, 255, 0.06) 45%,
    transparent 50%
  );
  opacity: 0;
  transition: opacity var(--duz-transition-fast);
  pointer-events: none;
  mix-blend-mode: screen;
}

.duz-glitch-image:hover::after {
  opacity: 1;
}

.duz-glitch-image:hover img {
  filter: contrast(1.1) brightness(1.05);
}

/* --- Cyber Line Hover (underline replacement) --- */
.duz-cyber-hover {
  position: relative;
  display: inline-block;
  cursor: pointer;
}

.duz-cyber-hover::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: var(--duz-accent);
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform var(--duz-transition-base);
}

.duz-cyber-hover:hover::after {
  transform: scaleX(1);
  transform-origin: left center;
  box-shadow: var(--duz-accent-glow);
}


/* ------------------------------------------------------------
   11. FORM ELEMENTS — Tactical / Military Aesthetic
   ------------------------------------------------------------ */

.duz-form-group {
  display: flex;
  flex-direction: column;
  gap: var(--duz-space-1);
  margin-bottom: var(--duz-space-5);
}

.duz-form-label {
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-xs);
  font-weight: var(--duz-font-weight-mono-regular);
  letter-spacing: var(--duz-tracking-wide);
  text-transform: uppercase;
  color: var(--duz-text-muted);
  display: flex;
  align-items: center;
  gap: var(--duz-space-2);
}

.duz-form-label--required::after {
  content: '*';
  color: var(--duz-alert);
  font-family: var(--duz-font-sans);
}

/* --- Text Inputs --- */
.duz-input {
  width: 100%;
  padding: 10px 14px;
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-sm);
  font-weight: var(--duz-font-weight-mono-regular);
  color: var(--duz-text-primary);
  background: var(--duz-bg-secondary);
  border: var(--duz-border-width) solid var(--duz-border-primary);
  border-radius: var(--duz-radius-md);
  transition:
    border-color var(--duz-transition-fast),
    box-shadow var(--duz-transition-fast),
    background var(--duz-transition-fast);
  appearance: none;
}

.duz-input::placeholder {
  color: var(--duz-text-muted);
  opacity: 0.6;
  text-transform: uppercase;
  letter-spacing: var(--duz-tracking-wider);
  font-size: var(--duz-text-xs);
}

.duz-input:hover {
  border-color: var(--duz-border-subtle);
}

.duz-input:focus {
  border-color: var(--duz-accent);
  background: var(--duz-bg-elevated);
  box-shadow: var(--duz-accent-glow), inset 0 1px 2px rgba(0, 0, 0, 0.3);
  outline: none;
}

.duz-input--error {
  border-color: var(--duz-alert);
}

.duz-input--error:focus {
  box-shadow: 0 0 0 2px rgba(255, 59, 48, 0.2);
}

.duz-input--success {
  border-color: var(--duz-success);
}

.duz-input--lg {
  padding: 14px 18px;
  font-size: var(--duz-text-base);
}

/* --- Textarea --- */
.duz-textarea {
  width: 100%;
  padding: 10px 14px;
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-sm);
  font-weight: var(--duz-font-weight-mono-regular);
  color: var(--duz-text-primary);
  background: var(--duz-bg-secondary);
  border: var(--duz-border-width) solid var(--duz-border-primary);
  border-radius: var(--duz-radius-md);
  resize: vertical;
  min-height: 100px;
  transition:
    border-color var(--duz-transition-fast),
    box-shadow var(--duz-transition-fast),
    background var(--duz-transition-fast);
}

.duz-textarea::placeholder {
  color: var(--duz-text-muted);
  opacity: 0.6;
  text-transform: uppercase;
  letter-spacing: var(--duz-tracking-wider);
  font-size: var(--duz-text-xs);
}

.duz-textarea:focus {
  border-color: var(--duz-accent);
  background: var(--duz-bg-elevated);
  box-shadow: var(--duz-accent-glow);
  outline: none;
}

/* --- Select --- */
.duz-select {
  width: 100%;
  padding: 10px 36px 10px 14px;
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-sm);
  font-weight: var(--duz-font-weight-mono-regular);
  color: var(--duz-text-primary);
  background: var(--duz-bg-secondary);
  border: var(--duz-border-width) solid var(--duz-border-primary);
  border-radius: var(--duz-radius-md);
  appearance: none;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236a6a6a' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  transition:
    border-color var(--duz-transition-fast),
    box-shadow var(--duz-transition-fast),
    background var(--duz-transition-fast);
}

.duz-select:focus {
  border-color: var(--duz-accent);
  box-shadow: var(--duz-accent-glow);
  outline: none;
}

.duz-select option {
  background: var(--duz-bg-primary);
  color: var(--duz-text-primary);
}

/* --- Checkbox & Radio --- */
.duz-checkbox,
.duz-radio {
  display: inline-flex;
  align-items: center;
  gap: var(--duz-space-3);
  cursor: pointer;
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-sm);
  color: var(--duz-text-secondary);
  user-select: none;
}

.duz-checkbox input,
.duz-radio input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.duz-checkbox-indicator,
.duz-radio-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  border: var(--duz-border-width) solid var(--duz-border-primary);
  background: var(--duz-bg-secondary);
  transition: all var(--duz-transition-fast);
}

.duz-checkbox-indicator {
  border-radius: var(--duz-radius-sm);
}

.duz-radio-indicator {
  border-radius: var(--duz-radius-full);
}

.duz-checkbox:hover .duz-checkbox-indicator,
.duz-radio:hover .duz-radio-indicator {
  border-color: var(--duz-accent-dim);
}

.duz-checkbox input:checked + .duz-checkbox-indicator {
  background: var(--duz-accent);
  border-color: var(--duz-accent);
}

.duz-checkbox input:checked + .duz-checkbox-indicator::after {
  content: '';
  width: 5px;
  height: 9px;
  border: solid var(--duz-black);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) translateY(-1px);
}

.duz-radio input:checked + .duz-radio-indicator {
  border-color: var(--duz-accent);
}

.duz-radio input:checked + .duz-radio-indicator::after {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: var(--duz-radius-full);
  background: var(--duz-accent);
  box-shadow: var(--duz-accent-glow);
}

.duz-checkbox input:focus-visible + .duz-checkbox-indicator,
.duz-radio input:focus-visible + .duz-radio-indicator {
  outline: var(--duz-border-width-focus) solid var(--duz-accent);
  outline-offset: 2px;
}

/* --- Toggle Switch --- */
.duz-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--duz-space-3);
  cursor: pointer;
  user-select: none;
}

.duz-toggle input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.duz-toggle-track {
  position: relative;
  width: 40px;
  height: 22px;
  border-radius: var(--duz-radius-full);
  background: var(--duz-border-primary);
  transition: background var(--duz-transition-fast);
  flex-shrink: 0;
}

.duz-toggle-track::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: var(--duz-radius-full);
  background: var(--duz-titanium);
  transition: transform var(--duz-transition-fast), background var(--duz-transition-fast);
}

.duz-toggle input:checked + .duz-toggle-track {
  background: var(--duz-accent-dim);
}

.duz-toggle input:checked + .duz-toggle-track::after {
  transform: translateX(18px);
  background: var(--duz-accent);
  box-shadow: var(--duz-accent-glow);
}

.duz-toggle-label {
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-sm);
  color: var(--duz-text-secondary);
}

/* --- Form Field Hint / Error --- */
.duz-form-hint {
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-xs);
  color: var(--duz-text-muted);
  letter-spacing: var(--duz-tracking-wider);
  padding-left: var(--duz-space-1);
}

.duz-form-error {
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-xs);
  color: var(--duz-alert);
  letter-spacing: var(--duz-tracking-wider);
  padding-left: var(--duz-space-1);
}

/* --- Quantity Input --- */
.duz-quantity {
  display: inline-flex;
  align-items: center;
  border: var(--duz-border-width) solid var(--duz-border-primary);
  border-radius: var(--duz-radius-md);
  overflow: hidden;
}

.duz-quantity-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--duz-bg-secondary);
  color: var(--duz-text-secondary);
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-lg);
  cursor: pointer;
  transition: all var(--duz-transition-fast);
  border: none;
  user-select: none;
}

.duz-quantity-btn:hover {
  background: var(--duz-bg-tertiary);
  color: var(--duz-accent);
}

.duz-quantity-input {
  width: 48px;
  height: 36px;
  text-align: center;
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-sm);
  font-weight: var(--duz-font-weight-medium);
  border: none;
  border-left: var(--duz-border-width) solid var(--duz-border-primary);
  border-right: var(--duz-border-width) solid var(--duz-border-primary);
  background: var(--duz-bg-primary);
  color: var(--duz-text-primary);
  appearance: textfield;
  -moz-appearance: textfield;
}

.duz-quantity-input::-webkit-inner-spin-button,
.duz-quantity-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}


/* ------------------------------------------------------------
   12. FOOTER STYLES
   ------------------------------------------------------------ */

.duz-footer {
  background: var(--duz-bg-secondary);
  border-top: var(--duz-border-width) solid var(--duz-border-subtle);
  padding: var(--duz-space-16) 0 var(--duz-space-8);
  margin-top: var(--duz-space-16);
}

/* --- Footer Grid --- */
.duz-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--duz-space-10);
  padding-bottom: var(--duz-space-12);
  border-bottom: var(--duz-border-width) solid var(--duz-border-subtle);
}

.duz-footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--duz-space-4);
}

.duz-footer-logo {
  font-family: var(--duz-font-display);
  font-size: var(--duz-text-xl);
  font-weight: var(--duz-font-weight-bold);
  letter-spacing: var(--duz-tracking-wider);
  text-transform: uppercase;
  color: var(--duz-text-primary);
}

.duz-footer-tagline {
  font-size: var(--duz-text-sm);
  color: var(--duz-text-muted);
  line-height: var(--duz-leading-relaxed);
  max-width: 320px;
}

/* --- Footer Columns --- */
.duz-footer-col-title {
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-xs);
  font-weight: var(--duz-font-weight-medium);
  letter-spacing: var(--duz-tracking-wide);
  text-transform: uppercase;
  color: var(--duz-text-muted);
  margin-bottom: var(--duz-space-4);
  padding-bottom: var(--duz-space-2);
  border-bottom: var(--duz-border-width) solid var(--duz-border-subtle);
}

.duz-footer-col-links {
  display: flex;
  flex-direction: column;
  gap: var(--duz-space-2);
}

.duz-footer-link {
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-sm);
  font-weight: var(--duz-font-weight-mono-regular);
  color: var(--duz-text-secondary);
  text-decoration: none;
  transition: color var(--duz-transition-fast), padding-left var(--duz-transition-fast);
  padding: 2px 0;
}

.duz-footer-link:hover {
  color: var(--duz-accent);
  padding-left: 4px;
}

/* --- Footer Bottom Bar --- */
.duz-footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--duz-space-4);
  padding-top: var(--duz-space-8);
}

.duz-footer-copyright {
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-xs);
  color: var(--duz-text-muted);
  letter-spacing: var(--duz-tracking-wider);
}

.duz-footer-legal {
  display: flex;
  align-items: center;
  gap: var(--duz-space-4);
}

.duz-footer-legal a {
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-xs);
  color: var(--duz-text-muted);
  letter-spacing: var(--duz-tracking-wider);
  transition: color var(--duz-transition-fast);
}

.duz-footer-legal a:hover {
  color: var(--duz-accent);
}

.duz-footer-legal-sep {
  color: var(--duz-border-primary);
  font-size: var(--duz-text-xs);
}

/* --- Footer Social Links --- */
.duz-footer-social {
  display: flex;
  align-items: center;
  gap: var(--duz-space-3);
}

.duz-footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: var(--duz-border-width) solid var(--duz-border-subtle);
  border-radius: var(--duz-radius-md);
  color: var(--duz-text-muted);
  transition: all var(--duz-transition-fast);
}

.duz-footer-social a:hover {
  border-color: var(--duz-accent);
  color: var(--duz-accent);
  box-shadow: var(--duz-accent-glow);
  transform: translateY(-2px);
}

/* --- Footer Newsletter Signup --- */
.duz-footer-newsletter {
  display: flex;
  gap: var(--duz-space-2);
  margin-top: var(--duz-space-4);
}

.duz-footer-newsletter .duz-input {
  flex: 1;
  min-width: 0;
}

/* --- Footer Responsive --- */
@media (max-width: 1023px) {
  .duz-footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--duz-space-8);
  }

  .duz-footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 767px) {
  .duz-footer {
    padding: var(--duz-space-12) 0 var(--duz-space-6);
  }

  .duz-footer-grid {
    grid-template-columns: 1fr;
    gap: var(--duz-space-8);
  }

  .duz-footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .duz-footer-legal {
    justify-content: center;
    flex-wrap: wrap;
  }

  .duz-footer-social {
    margin-top: var(--duz-space-2);
  }

  .duz-footer-newsletter {
    flex-direction: column;
  }
}


/* ------------------------------------------------------------
   13. UTILITY CLASSES
   ------------------------------------------------------------ */

/* --- Spacing --- */
.duz-mt-0  { margin-top: 0; }
.duz-mt-4  { margin-top: var(--duz-space-4); }
.duz-mt-6  { margin-top: var(--duz-space-6); }
.duz-mt-8  { margin-top: var(--duz-space-8); }
.duz-mt-12 { margin-top: var(--duz-space-12); }
.duz-mt-16 { margin-top: var(--duz-space-16); }
.duz-mt-20 { margin-top: var(--duz-space-20); }
.duz-mt-24 { margin-top: var(--duz-space-24); }

.duz-mb-0  { margin-bottom: 0; }
.duz-mb-4  { margin-bottom: var(--duz-space-4); }
.duz-mb-6  { margin-bottom: var(--duz-space-6); }
.duz-mb-8  { margin-bottom: var(--duz-space-8); }
.duz-mb-12 { margin-bottom: var(--duz-space-12); }
.duz-mb-16 { margin-bottom: var(--duz-space-16); }
.duz-mb-20 { margin-bottom: var(--duz-space-20); }
.duz-mb-24 { margin-bottom: var(--duz-space-24); }

.duz-py-4  { padding-top: var(--duz-space-4);  padding-bottom: var(--duz-space-4); }
.duz-py-6  { padding-top: var(--duz-space-6);  padding-bottom: var(--duz-space-6); }
.duz-py-8  { padding-top: var(--duz-space-8);  padding-bottom: var(--duz-space-8); }
.duz-py-12 { padding-top: var(--duz-space-12); padding-bottom: var(--duz-space-12); }
.duz-py-16 { padding-top: var(--duz-space-16); padding-bottom: var(--duz-space-16); }
.duz-py-20 { padding-top: var(--duz-space-20); padding-bottom: var(--duz-space-20); }

.duz-px-4  { padding-left: var(--duz-space-4);  padding-right: var(--duz-space-4); }
.duz-px-6  { padding-left: var(--duz-space-6);  padding-right: var(--duz-space-6); }

/* --- Text Alignment --- */
.duz-text-left   { text-align: left; }
.duz-text-center { text-align: center; }
.duz-text-right  { text-align: right; }

/* --- Text Color --- */
.duz-text-accent { color: var(--duz-accent); }
.duz-text-muted  { color: var(--duz-text-muted); }
.duz-text-white  { color: var(--duz-text-primary); }
.duz-text-alert  { color: var(--duz-alert); }

/* --- Display --- */
.duz-hidden        { display: none; }
.duz-block         { display: block; }
.duz-inline-block  { display: inline-block; }
.duz-inline-flex   { display: inline-flex; }
.duz-flex          { display: flex; }

/* --- Visibility --- */
.duz-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Divider --- */
.duz-divider {
  width: 100%;
  height: var(--duz-border-width);
  background: var(--duz-border-subtle);
  border: none;
  margin: var(--duz-space-8) 0;
}

.duz-divider--accent {
  background: var(--duz-accent);
  box-shadow: var(--duz-accent-glow);
  height: 2px;
  width: 60px;
  margin: var(--duz-space-6) 0;
}

.duz-divider--center {
  margin-left: auto;
  margin-right: auto;
}

/* --- Responsive Visibility --- */
@media (min-width: 768px) {
  .duz-mobile-only { display: none !important; }
}

@media (max-width: 767px) {
  .duz-desktop-only { display: none !important; }
}

/* --- Screen reader focusable (skip links) --- */
.duz-skip-link {
  position: absolute;
  top: -100%;
  left: var(--duz-space-4);
  z-index: var(--duz-z-toast);
  padding: var(--duz-space-3) var(--duz-space-6);
  background: var(--duz-accent);
  color: var(--duz-black);
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-sm);
  text-transform: uppercase;
  letter-spacing: var(--duz-tracking-wide);
  border-radius: 0 0 var(--duz-radius-md) var(--duz-radius-md);
  transition: top var(--duz-transition-fast);
}

.duz-skip-link:focus {
  top: 0;
  outline: none;
}


/* ------------------------------------------------------------
   14. ACCESSIBILITY / REDUCED MOTION
   ------------------------------------------------------------ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}


/* ------------------------------------------------------------
   15. PRINT STYLES
   ------------------------------------------------------------ */

@media print {
  .duz-nav,
  .duz-nav-mobile,
  .duz-footer,
  .duz-btn,
  .duz-product-actions {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
    font-size: 12pt;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}

/* ------------------------------------------------------------
   HERO SECTION — Missing from original CSS
   ------------------------------------------------------------ */

.duz-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--duz-black);
  padding-top: 64px;
}

.duz-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: url('/assets/img/duz-hero-bg.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.25;
}

.duz-hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg,
    rgba(10,10,10,0.85) 0%,
    rgba(10,10,10,0.6) 50%,
    rgba(10,10,10,0.95) 100%
  );
}

.duz-hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
  padding: var(--duz-space-16) 0;
}

.duz-hero-content .duz-subhead {
  margin-bottom: var(--duz-space-6);
  color: var(--duz-text-accent);
}

.duz-hero-content .duz-display-xl {
  margin-bottom: var(--duz-space-6);
  color: var(--duz-white);
}

.duz-hero-subtitle {
  font-size: var(--duz-text-lg);
  color: var(--duz-text-secondary);
  margin-bottom: var(--duz-space-8);
  max-width: 560px;
  line-height: 1.6;
}

.duz-hero-actions {
  display: flex;
  gap: var(--duz-space-4);
  flex-wrap: wrap;
  margin-bottom: var(--duz-space-12);
}

.duz-hero-metrics {
  display: flex;
  gap: var(--duz-space-10);
  flex-wrap: wrap;
  padding-top: var(--duz-space-8);
  border-top: 1px solid rgba(255,255,255,0.06);
}

.duz-metric {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.duz-metric-value {
  font-family: var(--duz-font-display);
  font-size: var(--duz-text-3xl);
  font-weight: var(--duz-font-weight-bold);
  color: var(--duz-accent);
  letter-spacing: var(--duz-tracking-tight);
}

.duz-metric-label {
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-xs);
  text-transform: uppercase;
  letter-spacing: var(--duz-tracking-wide);
  color: var(--duz-text-muted);
}


/* ------------------------------------------------------------
   FEATURED SECTION
   ------------------------------------------------------------ */

.duz-section--featured {
  background: var(--duz-bg-secondary);
  padding: var(--duz-space-24) 0;
}


/* ------------------------------------------------------------
   RESEARCH HIGHLIGHT
   ------------------------------------------------------------ */

.duz-section--research-highlight {
  padding: var(--duz-space-20) 0;
  background: var(--duz-bg-primary);
  position: relative;
}

.duz-section--research-highlight::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--duz-accent-dim), transparent);
}

.duz-section--research-highlight .duz-body-lg {
  max-width: 700px;
  margin: 0 auto;
  color: var(--duz-text-secondary);
}


/* ------------------------------------------------------------
   NEWSLETTER SECTION
   ------------------------------------------------------------ */

.duz-section--newsletter {
  padding: var(--duz-space-20) 0;
  background: var(--duz-bg-secondary);
}

.duz-newsletter-form {
  max-width: 480px;
  margin: var(--duz-space-8) auto 0;
}


/* ------------------------------------------------------------
   FOOTER — Fix class names
   ------------------------------------------------------------ */

.duz-footer {
  background: var(--duz-black);
  border-top: 1px solid var(--duz-border-subtle);
  padding: var(--duz-space-16) 0 var(--duz-space-8);
}

.duz-footer .duz-container > * + * {
  margin-top: var(--duz-space-12);
}

.duz-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--duz-space-8);
}

.duz-footer-brand {
  max-width: 300px;
}

.duz-footer-tagline {
  font-size: var(--duz-text-sm);
  color: var(--duz-text-muted);
  margin-top: var(--duz-space-3);
  line-height: 1.5;
}

.duz-footer-col-title {
  font-family: var(--duz-font-mono);
  font-size: var(--duz-text-xs);
  text-transform: uppercase;
  letter-spacing: var(--duz-tracking-wide);
  color: var(--duz-accent);
  margin-bottom: var(--duz-space-4);
  font-weight: var(--duz-font-weight-medium);
}

.duz-footer-link {
  display: block;
  font-size: var(--duz-text-sm);
  color: var(--duz-text-muted);
  transition: color var(--duz-transition-fast);
  padding: 3px 0;
  text-decoration: none;
}

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

.duz-footer-newsletter {
  max-width: 500px;
}

.duz-footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--duz-space-4);
  padding-top: var(--duz-space-6);
  border-top: 1px solid var(--duz-border-subtle);
}

.duz-footer-copyright {
  font-size: var(--duz-text-xs);
  color: var(--duz-text-muted);
  letter-spacing: var(--duz-tracking-wider);
}

@media (max-width: 767px) {
  .duz-footer-grid {
    grid-template-columns: 1fr;
    gap: var(--duz-space-6);
  }
  .duz-hero-content {
    padding: var(--duz-space-10) 0;
  }
  .duz-hero-metrics {
    gap: var(--duz-space-6);
  }
}