:root {
  --xr-base: #09090b;
  --xr-text: #f4f4f5;
  --xr-muted: #71717a;
  --xr-accent: #c4714a;
  --xr-border: #27272a;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--xr-base);
  color: var(--xr-text);
  font-family: 'Cabinet Grotesk', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.xr-card {
  display: grid;
  place-items: center;
  min-height: 100svh;
  padding: 2rem;
}

.xr-card__inner {
  max-width: 38rem;
  text-align: center;
}

.xr-glyph {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2rem;
  color: var(--xr-accent);
  margin: 0 0 1rem;
  opacity: 0.85;
}

.xr-card__title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 500;
  letter-spacing: 0.01em;
  margin: 0 0 1rem;
}

.xr-card__lead {
  color: var(--xr-text);
  line-height: 1.6;
  margin: 0 auto 2rem;
}

.xr-enter {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  color: var(--xr-text);
  background: transparent;
  border: 1px solid var(--xr-accent);
  border-radius: 2px;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  transition: background 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              color 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.xr-enter:hover {
  background: var(--xr-accent);
  color: var(--xr-base);
}

.xr-card__hint,
.xr-card__back {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--xr-muted);
  margin-top: 1.5rem;
  text-decoration: none;
}

.xr-card__back:hover { color: var(--xr-text); }

.xr-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  background: var(--xr-base);
}