* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #12121c;
  font-family: "Segoe UI", system-ui, sans-serif;
}

.game {
  position: relative;
  width: 800px;
  max-width: 95vw;
  height: 300px;
  overflow: hidden;
  border-radius: 12px;
  background: linear-gradient(#1b2340, #2c3e66 70%, #3a5080);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.score {
  position: absolute;
  top: 14px;
  right: 20px;
  font-size: 28px;
  font-weight: bold;
  color: #fff;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
  z-index: 5;
}

.hint {
  position: absolute;
  top: 40%;
  width: 100%;
  text-align: center;
  color: rgba(255, 255, 255, 0.85);
  font-size: 20px;
  letter-spacing: 1px;
  z-index: 5;
  animation: pulse 1.2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.ground {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 50px;
  background: #263238;
  border-top: 4px solid #4caf7d;
}

.player {
  position: absolute;
  left: 80px;
  bottom: 50px;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: #ffca3a;
  box-shadow: 0 0 12px rgba(255, 202, 58, 0.6);
  z-index: 3;
}

.player::before,
.player::after {
  content: "";
  position: absolute;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #12121c;
}

.player::before { left: 7px; }
.player::after { right: 7px; }

.obstacle {
  position: absolute;
  bottom: 50px;
  width: 22px;
  border-radius: 4px 4px 0 0;
  background: #e5484d;
  box-shadow: 0 0 10px rgba(229, 72, 77, 0.5);
  z-index: 2;
}

.game-over {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: rgba(10, 10, 20, 0.75);
  color: #fff;
  z-index: 10;
}

.game-over.visible {
  display: flex;
}

.game-over h1 {
  font-size: 34px;
  margin-bottom: 6px;
}

.game-over p {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.9);
}

.restart-hint {
  margin-top: 10px;
  animation: pulse 1.2s ease-in-out infinite;
}