* {
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  margin: 0;
  background: #0f172a;
  color: #ffffff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.game-container {
  width: 100%;
  max-width: 420px;
  background: #020617;
  padding: 20px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 0 20px rgba(0,0,0,0.6);
}

h1 {
  margin-top: 0;
}

.score {
  font-size: 18px;
  margin: 10px 0;
}

.bar-container {
  position: relative;
  width: 100%;
  height: 30px;
  background: #1e293b;
  border-radius: 15px;
  overflow: hidden;
  margin: 20px 0;
}

#bar {
  position: absolute;
  top: 0;
  width: 40px;
  height: 100%;
  background: #38bdf8;
  border-radius: 15px;
}

.center-line {
  position: absolute;
  top: 0;
  left: 50%;
  width: 4px;
  height: 100%;
  background: #22c55e;
  transform: translateX(-50%);
}

button {
  width: 100%;
  padding: 14px;
  font-size: 18px;
  font-weight: bold;
  background: #22c55e;
  color: #020617;
  border: none;
  border-radius: 10px;
  cursor: pointer;
}

button:active {
  transform: scale(0.98);
}

.hint {
  margin-top: 10px;
  font-size: 14px;
  opacity: 0.8;
}

.ad {
  margin: 10px 0;
  padding: 10px;
  background: #020617;
  border: 1px dashed #334155;
  border-radius: 8px;
  font-size: 12px;
  color: #64748b;
}