body {
  background: linear-gradient(135deg, #e0e7ff 0%, #f4f4f4 100%);
  font-family: 'Segoe UI', Arial, sans-serif;
  margin: 0;
  padding: 0;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}
#game-container {
  width: 96vw;
  height: 90vh;
  margin: 2vh auto;
  background: rgba(255,255,255,0.95);
  border-radius: 24px;
  box-shadow: 0 8px 32px rgba(80,120,255,0.15), 0 1.5px 8px rgba(0,0,0,0.08);
  padding: 30px 20px 40px 20px;
  position: relative;
  overflow: hidden;
  max-width: 1600px;
  max-height: 900px;
  border: 2px solid #b3c6ff;
}
#falling-source {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #e3e3ff 60%, #c7eaff 100%);
  padding: 22px 32px;
  border-radius: 16px;
  font-size: 1.4em;
  min-width: 220px;
  text-align: center;
  box-shadow: 0 4px 16px rgba(80,120,255,0.10);
  border: 1.5px solid #b3c6ff;
  color: #2a3a5a;
  font-weight: 500;
  z-index: 2;
  letter-spacing: 0.01em;
}
#options {
  position: absolute;
  bottom: 40px;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-around;
  z-index: 1;
}
#options button {
  background: linear-gradient(90deg, #4f8cff 60%, #6fd6ff 100%);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 16px 28px;
  font-size: 1.1em;
  font-weight: 500;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(80,120,255,0.10);
  transition: background 0.2s, transform 0.1s;
  outline: none;
  letter-spacing: 0.01em;
}
#options button:hover {
  background: linear-gradient(90deg, #3766c3 60%, #4fd6ff 100%);
  transform: scale(1.07);
}
#game-over {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2.2em;
  color: #d32f2f;
  background: #fff;
  padding: 28px 60px;
  border-radius: 18px;
  box-shadow: 0 2px 16px rgba(211,47,47,0.10);
  z-index: 10;
  border: 2px solid #ffb3b3;
  font-weight: 600;
  letter-spacing: 0.02em;
}
#score {
  position: absolute;
  top: 18px;
  right: 36px;
  font-size: 1.3em;
  color: #4f8cff;
  background: #f0f6ff;
  padding: 10px 24px;
  border-radius: 10px;
  box-shadow: 0 1px 6px rgba(80,120,255,0.08);
  font-weight: 600;
  border: 1.5px solid #b3c6ff;
  z-index: 5;
}