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

body {
  font-family: "Segoe UI", Arial, sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  animation: fadeIn 1s ease-out;
}

.game-container {
  width: 100%;
  border-radius: 20px;
  padding: 2rem;
  animation: slideUp 0.8s ease-out;
}

h1 {
  font-size: 24px;
  margin-bottom: 20px;
  color: #333;
}

.question-container {
  background: white;
  border-radius: 15px;
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  animation: slideUp 0.5s ease-out;
}

.question {
  font-size: 1.4rem;
  color: #2c3e50;
  margin-bottom: 1.5rem;
  font-weight: 600;
  text-align: center;
}

.options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
  position: relative;
  padding-bottom: 80px;
}

input[type="radio"] {
  display: none;
}

label {
  display: block;
  padding: 1rem;
  font-size: 1.2rem;
  background: #f8f9fa;
  color: #2c3e50;
  border: 2px solid #e9ecef;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
}

input[type="radio"]:checked + label {
  background: #007bff;
  color: white;
  border-color: #007bff;
  transform: scale(1.05);
}

.result {
  margin-top: 20px;
  font-size: 18px;
  font-weight: bold;
  min-height: 30px;
}

.correct-feedback,
.incorrect-feedback {
  display: none;
  padding: 1rem;
  border-radius: 10px;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  text-align: center;
  font-weight: 500;
  animation: slideUp 0.3s ease-out;
  z-index: 1;
}

.correct-feedback {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.incorrect-feedback {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

#option1:checked + label + .incorrect-feedback {
  display: block;
}

#option2:checked + label + .correct-feedback {
  display: block;
}

#option3:checked + label + .incorrect-feedback {
  display: block;
}

#option4:checked + label + .incorrect-feedback {
  display: block;
}

#q2option1:checked + label + .incorrect-feedback {
  display: block;
}

#q2option2:checked + label + .incorrect-feedback {
  display: block;
}

#q2option3:checked + label + .correct-feedback {
  display: block;
}

#q2option4:checked + label + .incorrect-feedback {
  display: block;
}

#q3option1:checked + label + .incorrect-feedback {
  display: block;
}

#q3option2:checked + label + .incorrect-feedback {
  display: block;
}

#q3option3:checked + label + .correct-feedback {
  display: block;
}

#q3option4:checked + label + .incorrect-feedback {
  display: block;
}

#q4option1:checked + label + .incorrect-feedback {
  display: block;
}

#q4option2:checked + label + .incorrect-feedback {
  display: block;
}

#q4option3:checked + label + .correct-feedback {
  display: block;
}

#q4option4:checked + label + .incorrect-feedback {
  display: block;
}

#q5option1:checked + label + .incorrect-feedback {
  display: block;
}

#q5option2:checked + label + .incorrect-feedback {
  display: block;
}

#q5option3:checked + label + .correct-feedback {
  display: block;
}

#q5option4:checked + label + .incorrect-feedback {
  display: block;
}

#q6option1:checked + label + .incorrect-feedback {
  display: block;
}

#q6option2:checked + label + .incorrect-feedback {
  display: block;
}

#q6option3:checked + label + .correct-feedback {
  display: block;
}

#q6option4:checked + label + .incorrect-feedback {
  display: block;
}

#q7option1:checked + label + .incorrect-feedback {
  display: block;
}

#q7option2:checked + label + .correct-feedback {
  display: block;
}

#q7option3:checked + label + .incorrect-feedback {
  display: block;
}

#q7option4:checked + label + .incorrect-feedback {
  display: block;
}

#q8option1:checked + label + .incorrect-feedback {
  display: block;
}

#q8option2:checked + label + .incorrect-feedback {
  display: block;
}

#q8option3:checked + label + .correct-feedback {
  display: block;
}

#q8option4:checked + label + .incorrect-feedback {
  display: block;
}

#q9option1:checked + label + .incorrect-feedback {
  display: block;
}

#q9option2:checked + label + .incorrect-feedback {
  display: block;
}

#q9option3:checked + label + .correct-feedback {
  display: block;
}

#q9option4:checked + label + .incorrect-feedback {
  display: block;
}

#q10option1:checked + label + .incorrect-feedback {
  display: block;
}

#q10option2:checked + label + .incorrect-feedback {
  display: block;
}

#q10option3:checked + label + .correct-feedback {
  display: block;
}

#q10option4:checked + label + .incorrect-feedback {
  display: block;
}

#q11option1:checked + label + .incorrect-feedback {
  display: block;
}

#q11option2:checked + label + .incorrect-feedback {
  display: block;
}

#q11option3:checked + label + .correct-feedback {
  display: block;
}

#q11option4:checked + label + .incorrect-feedback {
  display: block;
}

input[type="radio"]:checked + label {
  background-color: #dc3545;
  color: white;
}

#option2:checked + label,
#q2option3:checked + label,
#q3option3:checked + label,
#q4option3:checked + label,
#q5option3:checked + label,
#q6option3:checked + label,
#q7option2:checked + label,
#q8option3:checked + label,
#q9option3:checked + label,
#q10option3:checked + label,
#q11option3:checked + label {
  background-color: #28a745;
  color: white;
}

@media (prefers-color-scheme: dark) {
  body {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
  }

  h1 {
    color: #ffffff;
  }

  .question-container {
    background: #363636;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  }

  .question {
    color: #ffffff;
  }

  label {
    background: #404040;
    color: #ffffff;
    border-color: #505050;
  }

  #option2:checked + label,
  #q2option3:checked + label,
  #q3option3:checked + label,
  #q4option3:checked + label,
  #q5option3:checked + label,
  #q6option3:checked + label,
  #q7option2:checked + label,
  #q8option3:checked + label,
  #q9option3:checked + label,
  #q10option3:checked + label,
  #q11option3:checked + label {
    background-color: #2e7d32;
    color: #ffffff;
  }

  input[type="radio"]:checked + label {
    background-color: #c62828;
    color: #ffffff;
  }

  .correct-feedback {
    background: #1b5e20;
    color: #81c784;
    border-color: #2e7d32;
  }

  .incorrect-feedback {
    background: #b71c1c;
    color: #ef9a9a;
    border-color: #c62828;
  }
}

.hero {
  text-align: center;
  padding: 2.5rem 0;
  margin-bottom: 3rem;
  position: relative;
  background: linear-gradient(135deg, #007bff, #00bfff, #007bff);
  background-size: 200% 200%;
  border-radius: 15px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  animation: gradientShift 8s ease infinite;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  color: white;
  margin: 0;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
  letter-spacing: 1px;
  animation: slideDown 0.8s ease-out;
}

.hero-subtitle {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.3rem;
  margin-top: 0.8rem;
  font-weight: 300;
  animation: fadeIn 1s ease-out 0.3s both;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-inline: auto;
}

.hero-decoration {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.5) 50%,
    transparent 100%
  );
  animation: shimmer 2s infinite;
}

.hero-credit {
  display: inline-block;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  margin-top: 1rem;
  text-decoration: none;
  transition: color 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.02);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

@keyframes slideDown {
  from {
    transform: translateY(-20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

@media (max-width: 600px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .options {
    grid-template-columns: 1fr;
  }

  .question {
    font-size: 1.2rem;
  }
}