:root {
  color-scheme: dark;

  --dr-surface-base: #110402;
  --dr-surface-secondary: #230905;
  --dr-surface-elevated: #340d07;
  --dr-surface-highlight: #46120a;
  --dr-surface-active: #5a1810;

  --dr-text-primary: #f7eae8;
  --dr-text-secondary: #efd5d1;
  --dr-text-muted: rgba(239, 213, 209, 0.5);
  --dr-text-link: #e7c0ba;
  --dr-text-link-hover: #cf8175;
  --dr-text-link-visited: #dfaba3;
  --dr-text-heading: #cf8175;

  --dr-border-color: #691b0f;
  --dr-border-color-well: #46120a;
  --dr-border-color-hover: #af2e1a;
  --dr-border-color-invalid: #bf5747;

  --dr-accent: #af2e1a;
  --dr-warning: #d4a759;
  --dr-danger: #bf5747;
  --dr-danger-text: #cb6353;
  --dr-success: #8fa667;
  --bricked-board: #7a2012;
  --stack-overglow-15: rgba(212, 167, 89, 0.15);
  --stack-overglow-30: rgba(212, 167, 89, 0.3);
  --amber-alert-10: rgba(191, 87, 71, 0.1);
  --amber-alert-25: rgba(191, 87, 71, 0.25);

  --dr-shadow-offset-md: 3px 3px 0 0 var(--dr-surface-highlight);
  --dr-shadow-inner-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.1);

  --dr-focus-ring: 2px solid #d4a759;
  --dr-focus-ring-offset: 2px;

  --dr-radius: 4px;

  --dr-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);

  --dr-z-content: 10;
  --dr-z-noise: 1000;

  --dr-scanline: rgba(175, 46, 26, 0.03);

  --dr-font-heading: "Avenir Next Condensed", "Arial Narrow", "Helvetica Neue Condensed", Impact, system-ui, sans-serif;
  --dr-font-body: "Zilla Slab", "Bitter", Rockwell, "Iowan Old Style", Georgia, serif;
  --dr-font-mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, "DejaVu Sans Mono", monospace;
  font-variant-numeric: tabular-nums;
}

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

html {
  background: var(--dr-surface-base);
  color: var(--dr-text-primary);
}

body {
  font-family: var(--dr-font-body);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  line-height: 1.6;
  position: relative;
  z-index: var(--dr-z-content);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.02;
  pointer-events: none;
  z-index: var(--dr-z-noise);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    var(--dr-scanline) 2px,
    var(--dr-scanline) 4px
  );
  pointer-events: none;
  z-index: calc(var(--dr-z-noise) - 1);
}

.container {
  text-align: center;
  max-width: 600px;
  padding: 2rem;
  position: relative;
  z-index: var(--dr-z-content);
}

h1 {
  color: var(--dr-text-heading);
  font-family: var(--dr-font-heading);
  font-weight: 700;
  font-size: 2.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.1;
  margin-bottom: 0.75rem;
}

p {
  font-size: 1.1rem;
  color: var(--dr-text-secondary);
  margin-bottom: 1.5rem;
}

p strong {
  color: var(--dr-text-primary);
  font-weight: 600;
}

code {
  background: var(--dr-surface-secondary);
  border: 2px solid var(--dr-border-color);
  border-radius: 2px;
  padding: 0.15rem 0.4rem;
  font-family: var(--dr-font-mono);
  font-size: 0.875em;
  color: var(--dr-warning);
}

.error-code {
  font-family: var(--dr-font-mono);
  font-size: 4rem;
  line-height: 1;
  color: var(--dr-danger-text);
  margin-bottom: 0.75rem;
}

.hint {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--dr-surface-elevated);
  border: 2px solid var(--dr-border-color);
  border-radius: var(--dr-radius);
  box-shadow: var(--dr-shadow-offset-md), var(--dr-shadow-inner-highlight);
  text-align: left;
}

.hint-warning { border-left: 3px solid var(--dr-warning); }
.hint-error { border-left: 3px solid var(--dr-danger); }

.hint p {
  margin-bottom: 0;
  color: var(--dr-text-muted);
  font-size: 1rem;
}

a {
  color: var(--dr-text-link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--dr-transition-fast);
}

a:hover {
  color: var(--dr-text-link-hover);
  text-decoration-thickness: 2px;
}

a:visited {
  color: var(--dr-text-link-visited);
}

a:active {
  color: var(--dr-accent);
}

a:focus-visible {
  outline: var(--dr-focus-ring);
  outline-offset: var(--dr-focus-ring-offset);
}

.status-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--dr-z-content);
  background: var(--bricked-board);
  border-top: 2px solid var(--dr-border-color);
  color: var(--dr-text-primary);
  font-family: var(--dr-font-mono);
  font-size: 0.75rem;
  text-align: center;
  padding: 0.25rem 0.5rem;
}

.status-bar .ok { color: var(--dr-success); }
.status-bar .err { color: var(--dr-danger-text); }

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  body::before,
  body::after {
    content: none;
  }
}