/* ============================================================
   panel-arcade.css
   ChessyCiv main menu mockup — dark navy background with neon
   cyan glow text, VT323 font, bordered menu buttons, and a
   CRT scanline overlay.

   Z-index layering within this panel:
     0  — panel background + grid texture
     1  — .arcade__scanlines overlay (above bg, below content)
     2  — .arcade__content (text visible above scanlines)
   ============================================================ */

/* ---------- Panel Background ---------- */
.panel--arcade {
  background-color: var(--arcade-bg);
  /* Faint grid evokes a CRT/vector display surface */
  background-image:
    linear-gradient(var(--arcade-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--arcade-grid-line) 1px, transparent 1px);
  background-size: 44px 44px;

  font-family: var(--font-arcade);
  color: var(--arcade-text);

  display: flex;
  align-items: center;
  justify-content: center;

  /* Thin cyan border frame — matches ChessyCiv UI chrome */
  border: 2px solid var(--arcade-neon-dim);
  border-radius: 8px;
}

/* ---------- CRT Scanline Overlay ---------- */
/* Horizontal bands that simulate a CRT monitor's scan pattern */
.arcade__scanlines {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 3px,
    var(--arcade-scanline-mid) 3px,
    var(--arcade-scanline-mid) 4px
  );
  pointer-events: none;
}

/* ---------- Content ---------- */
.arcade__content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

/* Game title */
.arcade__title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1;
  color: var(--arcade-neon);
  letter-spacing: 0.06em;
  /* Layered glow: sharp inner, wide outer halo */
  text-shadow:
    0 0 6px  var(--arcade-neon),
    0 0 16px var(--arcade-neon),
    0 0 35px var(--arcade-neon-glow),
    0 0 70px var(--arcade-neon-glow);
  margin: var(--space-sm) 0 0.2rem;
}

/* Tagline below the title */
.arcade__subtitle {
  font-size: 1.05rem;
  color: var(--arcade-text);
  letter-spacing: 0.22em;
  opacity: 0.8;
  margin-bottom: var(--space-md);
}

/* ---------- Menu buttons ---------- */
.arcade__menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  width: min(80%, 16rem);
}

.arcade__menu li {
  padding: 0.5rem 1.2rem;
  border: 1.5px solid var(--arcade-neon-dim);
  color: var(--arcade-neon);
  font-size: 1rem;
  letter-spacing: 0.12em;
  text-align: center;
  text-shadow: 0 0 6px var(--arcade-neon);
}