* {
  box-sizing: border-box;
  font-family: "Inter", system-ui, sans-serif;
}

body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: radial-gradient(circle at top, #1e293b, #020617);
}

.quiz-container {
  background: rgba(15, 23, 42, 0.9);
  padding: 30px;
  border-radius: 18px;
  width: 360px;
  box-shadow: 0 25px 50px rgba(0,0,0,0.5);
  text-align: center;
}

.title {
  font-size: 1.5rem;
  font-weight: 700;
  color: #f8fafc;
  margin-bottom: 6px;
}

#progress {
  color: #94a3b8;
  margin-bottom: 20px;
  font-size: 0.9rem;
}

#question {
  color: #e5e7eb;
  margin-bottom: 20px;
  font-size: 1.1rem;
}

#answers button {
  width: 100%;
  padding: 14px;
  margin-bottom: 16px;
  border: none;
  border-radius: 12px;
  background: #1e293b;
  color: #e5e7eb;
  cursor: pointer;
  font-size: 1rem;
}

#answers button:hover {
  background: #334155;
}

.correct {
  background: #16a34a !important;
}

.wrong {
  background: #dc2626 !important;
}

#nextBtn, #restartBtn {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 12px;
}

#nextBtn {
  background: #2563eb;
  color: #fff;
  display: none;
}

#restartBtn {
  background: #16a34a;
  color: #fff;
  display: none;
}

#score {
  color: #f8fafc;
  font-size: 1.3rem;
  margin-top: 18px;
  display: none;
}