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

body {
  background: linear-gradient(135deg, #006cf8, #f7f7f7);
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.container {
  width: 100%;
  max-width: 500px;
  padding: 20px;
}

.card {
  background: white;
  padding: 25px;
  border-radius: 15px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.2);
  text-align: center;
  animation: fadeIn 0.5s ease;
}

.hidden {
  display: none;
}

h1 {
  margin-bottom: 10px;
}

h2 {
  margin: 20px 0;
}

button {
  background: #000000;
  color: white;
  border: none;
  padding: 12px 20px;
  border-radius: 10px;
  cursor: pointer;
  transition: 0.3s;
  margin-top: 15px;
}

button:hover {
  background: #075fc4;
  transform: scale(1.05);
}

.top {
  display: flex;
  justify-content: space-between;
  font-weight: bold;
}

.options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.option {
  padding: 10px;
  border: 2px solid #ddd;
  border-radius: 10px;
  cursor: pointer;
  transition: 0.3s;
}

.option:hover {
  background: #f3f4f6;
}

.correct {
  background: #22c55e !important;
  color: white;
}

.wrong {
  background: #ef4444 !important;
  color: white;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* RESPONSIVE */
@media (max-width: 600px) {
  .card {
    padding: 20px;
  }

  h2 {
    font-size: 18px;
  }
}