html, body {
  margin: 0;
  padding: 0;
  background: #000;
  height: 100%;
  overflow: hidden;
  font-family: "Courier New", Courier, monospace;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

#frame {
  position: relative;
  line-height: 0;
  box-shadow: 0 0 60px rgba(64, 160, 255, 0.18), 0 0 12px rgba(255, 64, 200, 0.12);
  border-radius: 6px;
}

canvas {
  display: block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  background: #000;
  border-radius: 6px;
  touch-action: manipulation; /* no double-tap zoom on taps */
}

body.touch-device #frame,
body.touch-device canvas {
  touch-action: none; /* games own every gesture on the screen */
}

/* CRT scanline overlay */
#frame.no-scan::after {
  display: none;
}

#frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: 6px;
  background:
    repeating-linear-gradient(
      to bottom,
      rgba(0, 0, 0, 0)    0px,
      rgba(0, 0, 0, 0)    2px,
      rgba(0, 0, 0, 0.18) 3px
    );
  mix-blend-mode: multiply;
}

#hint {
  margin-top: 8px;
  color: #446;
  font-size: 12px;
  letter-spacing: 2px;
  user-select: none;
}

/* ---------- touch controls (phones & tablets only) ---------- */

body.touch-device {
  -webkit-tap-highlight-color: transparent;
  touch-action: none;
  overscroll-behavior: none;
  /* keep the game clear of the control pad at the bottom */
  justify-content: flex-start;
  padding-top: max(8px, env(safe-area-inset-top, 8px));
}

body.touch-device #hint { display: none; }

#touchui {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: 185px;
  display: none;
  z-index: 20;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
  padding-bottom: env(safe-area-inset-bottom, 0);
}

#touchui.active { display: block; }

.tu-util {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  gap: 14px;
}

.tu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Courier New", monospace;
  font-weight: bold;
  color: #9ff;
  background: rgba(30, 40, 70, 0.55);
  border: 1px solid rgba(120, 200, 255, 0.45);
  border-radius: 10px;
  touch-action: none;
}

.tu-btn.on { background: rgba(80, 170, 255, 0.55); color: #fff; }

.tu-mini {
  min-width: 74px;
  height: 30px;
  font-size: 12px;
  letter-spacing: 1px;
}

.tu-ok { color: #ffe14d; border-color: rgba(255, 225, 77, 0.5); }

.tu-dpad {
  position: absolute;
  left: 16px;
  bottom: 14px;
  width: 138px;
  height: 138px;
  border-radius: 50%;
  background: rgba(30, 40, 70, 0.35);
  border: 1px solid rgba(120, 200, 255, 0.35);
}

.tu-arm {
  position: absolute;
  width: 40px;
  height: 40px;
  border-radius: 9px;
  background: rgba(120, 200, 255, 0.30);
}

.tu-up    { left: 49px; top: 8px; }
.tu-down  { left: 49px; bottom: 8px; }
.tu-left  { left: 8px; top: 49px; }
.tu-right { right: 8px; top: 49px; }

.tu-dpad.mode-lr .tu-up, .tu-dpad.mode-lr .tu-down { display: none; }
.tu-dpad.mode-ud .tu-left, .tu-dpad.mode-ud .tu-right { display: none; }

.tu-dpad.dir-up .tu-up, .tu-dpad.dir-down .tu-down,
.tu-dpad.dir-left .tu-left, .tu-dpad.dir-right .tu-right {
  background: rgba(120, 220, 255, 0.85);
}

.tu-actions {
  position: absolute;
  right: 16px;
  bottom: 14px;
  display: flex;
  align-items: flex-end;
  gap: 16px;
}

.tu-round {
  border-radius: 50%;
  font-size: 13px;
  letter-spacing: 1px;
}

.tu-a {
  width: 84px;
  height: 84px;
  color: #7cfc6a;
  border-color: rgba(124, 252, 106, 0.5);
}

.tu-b {
  width: 68px;
  height: 68px;
  margin-bottom: 24px;
  color: #ff8de1;
  border-color: rgba(255, 141, 225, 0.5);
}