* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;

  background: radial-gradient(circle at top, #111827, #0f172a, #020617);
  color: white;
}

.container {
  text-align: center;
}

.title {
  font-size: 42px;
  margin-bottom: 10px;
  letter-spacing: 2px;
}

.subtitle {
  font-size: 20px;
  opacity: 0.8;
  margin-bottom: 25px;
}

.card {
  width: 360px;
  padding: 25px;
  border-radius: 20px;

  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255,255,255,0.15);

  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

/* Timer */
#timer {
  font-size: 22px;
  font-weight: bold;
  color: #facc15;
  margin-bottom: 10px;
}

/* Score */
#score {
  font-size: 18px;
  opacity: 0.9;
  margin-bottom: 15px;
}

/* Question */
#question {
  font-size: 28px;
  font-weight: bold;
  margin-bottom: 20px;
  color: #60a5fa;
}

/* Choices */
#choices button {
  width: 100%;
  padding: 12px;
  margin: 8px 0;

  border: none;
  border-radius: 12px;
  cursor: pointer;

  font-size: 18px;
  font-weight: bold;

  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  color: white;

  transition: 0.25s;
}

#choices button:hover {
  transform: scale(1.05);
  background: linear-gradient(135deg, #22c55e, #3b82f6);
}

/* Glow effect when hovered */
#choices button:active {
  transform: scale(0.98);
}