:root {
  --bg: #06140a;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  user-select: none;
}

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  touch-action: none;
  overscroll-behavior: none;
}

#stage {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(120% 120% at 50% 0%, #0d2914 0%, #06140a 60%, #030a06 100%);
}

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

/* ---- Rotate prompt (portrait on phones) ---- */
.overlay-screen {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(120% 120% at 50% 0%, #0d2914 0%, #06140a 70%, #030a06 100%);
}
.overlay-screen[hidden] {
  display: none;
}

.rotate-art {
  position: relative;
  width: 140px;
  height: 140px;
}
.rotate-phone {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 64px;
  height: 116px;
  margin: -58px 0 0 -32px;
  border: 5px solid #8ef07a;
  border-radius: 14px;
  box-shadow: 0 0 24px rgba(142, 240, 122, 0.45);
  animation: rotatePhone 2.4s ease-in-out infinite;
}
.rotate-phone::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 7px;
  width: 18px;
  height: 4px;
  margin-left: -9px;
  border-radius: 3px;
  background: #8ef07a;
}
.rotate-arrow {
  position: absolute;
  top: -6px;
  right: -10px;
  width: 46px;
  height: 46px;
  border: 5px solid #f5c542;
  border-right-color: transparent;
  border-bottom-color: transparent;
  border-radius: 50%;
  transform: rotate(45deg);
  opacity: 0.9;
}
.rotate-arrow::after {
  content: "";
  position: absolute;
  top: -8px;
  left: 16px;
  border: 9px solid transparent;
  border-bottom-color: #f5c542;
  transform: rotate(45deg);
}

@keyframes rotatePhone {
  0%, 35% { transform: rotate(0deg); }
  65%, 100% { transform: rotate(-90deg); }
}