* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  background:
    radial-gradient(
      ellipse at 72% 18%,
      rgba(108, 44, 177, 0.28),
      transparent 34%
    ),
    radial-gradient(
      ellipse at 22% 70%,
      rgba(16, 105, 151, 0.17),
      transparent 42%
    ),
    #02030b;
  overflow: hidden;
  font-family: system-ui, sans-serif;
  cursor: pointer;
  height: 100vh;
  touch-action: none;
  user-select: none;
}
#game-canvas {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
}
#ui-layer {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
#score {
  position: fixed;
  top: 20px;
  left: 0;
  right: 0;
  text-align: center;
  z-index: 30;
  font:
    700 clamp(2rem, 6vw, 4rem) / 1 system-ui,
    sans-serif;
  color: #fff;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.8);
  pointer-events: none;
}
#round-progress {
  position: fixed;
  z-index: 31;
  left: 50%;
  bottom: 20px;
  width: min(420px, 58vw);
  height: 7px;
  transform: translateX(-50%);
  border-radius: 99px;
  overflow: hidden;
  background: rgba(128, 170, 255, 0.18);
  box-shadow: 0 2px 14px #0008;
  pointer-events: none;
}
#round-progress > i {
  display: block;
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, #54d7ff, #b36bff, #ffcf58);
  transition: width 0.12s linear;
}
#message {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 40;
  text-align: center;
  pointer-events: auto;
}
#message h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: #ffd65a;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.9);
  margin-bottom: 12px;
}
#game-logo {
  display: block;
  width: min(720px, 84vw);
  margin: 0 auto 14px;
  border-radius: 12px;
  box-shadow: 0 18px 45px #0009;
}
#message p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.1rem;
  margin-bottom: 6px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.8);
}
#message .hint {
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.9rem;
  margin-top: 16px;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 0.4;
  }
  50% {
    opacity: 0.8;
  }
}
.back-row {
  position: fixed;
  z-index: 100;
  left: 14px;
  top: 14px;
  pointer-events: auto;
}
.back-row a {
  color: rgba(255, 255, 255, 0.4);
  background: rgba(8, 10, 25, 0.9);
  border: 1px solid rgba(57, 66, 124, 0.5);
  padding: 8px 12px;
  border-radius: 9px;
  text-decoration: none;
  font-size: 13px;
  transition: color 0.15s;
}
.back-row a:hover {
  color: #fff;
}