:root {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow-x: hidden;
  background: #05050a;
  color: #e8ecff;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

#app {
  position: relative;
  width: 100%;
  height: 100vh;
  max-width: 100vw;
  overflow: hidden;
}

#game-canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

#fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
  background: #05050a;
}

#fallback.hidden {
  display: none;
}

#hud {
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  right: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  padding: 0.4rem 0.6rem;
  background: rgba(5, 5, 15, 0.6);
  border-radius: 0.5rem;
  font-size: 0.85rem;
  pointer-events: none;
  max-width: 100%;
  z-index: 2;
}

#controls {
  position: absolute;
  top: 3.6rem;
  left: 0.5rem;
  right: 0.5rem;
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 0.4rem;
  z-index: 2;
}

#overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(2, 2, 8, 0.7);
}

#overlay.hidden {
  display: none;
}

#overlay-panel {
  text-align: center;
  padding: 1.5rem;
  max-width: min(90vw, 26rem);
}

#overlay-panel h1 {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  border-radius: 0.4rem;
  padding: 0.6rem 1rem;
  background: #2a63ff;
  color: white;
}

button:active {
  background: #1a4bd8;
}

#touch-controls {
  position: absolute;
  bottom: 0.75rem;
  left: 0.5rem;
  right: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 0.5rem;
  max-width: 100%;
}

#touch-dpad {
  display: grid;
  grid-template-columns: repeat(3, 3rem);
  grid-template-areas:
    ".    up    ."
    "left  .  right"
    ".   down   .";
  gap: 0.25rem;
}

#touch-dpad button[data-touch="up"] { grid-area: up; }
#touch-dpad button[data-touch="down"] { grid-area: down; }
#touch-dpad button[data-touch="left"] { grid-area: left; }
#touch-dpad button[data-touch="right"] { grid-area: right; }

.touch-btn {
  width: 3rem;
  height: 3rem;
  background: rgba(42, 99, 255, 0.65);
  touch-action: none;
  user-select: none;
}

#btn-fire {
  width: 4.5rem;
  height: 4.5rem;
  border-radius: 50%;
  background: rgba(255, 80, 60, 0.75);
  font-weight: bold;
}

@media (max-width: 480px) {
  #hud {
    font-size: 0.75rem;
    gap: 0.5rem;
  }
  .touch-btn {
    width: 2.6rem;
    height: 2.6rem;
  }
  #btn-fire {
    width: 3.6rem;
    height: 3.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}