/* Neon Keep — shared theme. */
:root {
  --nk-bg: #0a0a12;
  --nk-bg-panel: #141424;
  --nk-neon: #00f0ff;
  --nk-neon-2: #ff2fd0;
  --nk-danger: #ff3b3b;
  --nk-text: #e8e8f0;
  --nk-muted: #8a8aa0;
  --nk-font-display: "Courier New", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --nk-font-body: system-ui, -apple-system, sans-serif;
  --nk-radius: 10px;
  --nk-space: 12px;
}

body {
  margin: 0;
  background: var(--nk-bg);
  color: var(--nk-text);
  font-family: var(--nk-font-body);
}

.nk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 var(--nk-space);
  border-radius: var(--nk-radius);
  border: 2px solid var(--nk-neon);
  background: transparent;
  color: var(--nk-neon);
  font-family: var(--nk-font-display);
  font-size: 1rem;
  cursor: pointer;
  transition: box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.nk-btn:hover,
.nk-btn:focus-visible {
  background: var(--nk-neon);
  color: var(--nk-bg);
  box-shadow: 0 0 6px var(--nk-neon), 0 0 18px var(--nk-neon);
  outline: none;
}

.nk-btn:active {
  box-shadow: 0 0 3px var(--nk-neon);
}

.nk-panel {
  background: color-mix(in srgb, var(--nk-bg-panel) 85%, transparent);
  border: 1px solid var(--nk-neon-2);
  border-radius: var(--nk-radius);
  padding: var(--nk-space);
}

.nk-title {
  font-family: var(--nk-font-display);
  font-size: clamp(1.75rem, 5vw, 3rem);
  color: var(--nk-neon);
  text-shadow: 0 0 6px var(--nk-neon), 0 0 18px var(--nk-neon-2);
  margin: 0;
}

.nk-crt {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.04),
    rgba(255, 255, 255, 0.04) 1px,
    rgba(0, 0, 0, 0) 2px,
    rgba(0, 0, 0, 0) 4px
  );
  z-index: 9999;
}