* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #111;
  overscroll-behavior: none;
}

#game {
  width: 100%;
  height: 100%;
}

/* Por defecto ocultos en PC; visibles en móvil / táctil */
#touch-ui {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  display: none;
  justify-content: space-between;
  align-items: flex-end;
  gap: 12px;
  padding: 12px 16px calc(12px + env(safe-area-inset-bottom, 0px));
  pointer-events: none;
}

@media (max-width: 900px), (pointer: coarse) {
  #touch-ui {
    display: flex;
  }
}

.tbtn {
  pointer-events: auto;
  width: 72px;
  height: 72px;
  border: 3px solid #ffe028;
  border-radius: 14px;
  background: rgba(20, 20, 20, 0.72);
  color: #ffe028;
  font-size: 28px;
  font-weight: 700;
  font-family: ui-monospace, monospace;
  line-height: 1;
  user-select: none;
  -webkit-user-select: none;
}

.tbtn.turbo {
  width: 110px;
  height: 64px;
  font-size: 16px;
  letter-spacing: 0.04em;
  color: #ff8c3c;
  border-color: #ff8c3c;
  margin-bottom: 4px;
}

.tbtn.active {
  background: rgba(255, 224, 40, 0.35);
  transform: scale(0.96);
}

.tbtn.turbo.active {
  background: rgba(255, 80, 40, 0.4);
}

/* En móvil landscape, botones un poco más chicos */
@media (max-height: 500px) {
  .tbtn {
    width: 58px;
    height: 58px;
    font-size: 22px;
  }
  .tbtn.turbo {
    width: 90px;
    height: 52px;
    font-size: 14px;
  }
}