body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 20px;
  transition: background-color 0.3s, color 0.3s;
}

body.dark {
  background: #181c1f;
  color: #f0f0f0;
}

body.light-mode {
  background: #f0f0f0;
  color: #222;
}

.container {
  max-width: 640px;
  margin: 0 auto;
  margin-top: 60px;
}

h1 {
  text-align: center;
  margin-bottom: 24px;
  color: #c62828;
  font-size: 2.2em;
}

body.dark h1 {
  color: #ef5350;
}

.quiz-area {
  background: #fff;
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

body.dark .quiz-area {
  background: #23272a;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.stats-bar {
  display: flex;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid #eee;
}

body.dark .stats-bar {
  border-bottom-color: #444;
}

.stat {
  font-weight: 600;
  color: #666;
}

body.dark .stat {
  color: #aaa;
}

.riddle-card {
  margin-top: 8px;
}

.riddle-question {
  font-size: 1.25em;
  line-height: 1.5;
  margin-bottom: 20px;
  min-height: 2.5em;
}

.answer-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.answer-input {
  width: 100%;
  padding: 12px 16px;
  font-size: 1.1em;
  border: 2px solid #ccc;
  border-radius: 10px;
  box-sizing: border-box;
}

body.dark .answer-input {
  background: #2c2f33;
  border-color: #555;
  color: #f0f0f0;
}

.answer-input:focus {
  outline: none;
  border-color: #c62828;
}

body.dark .answer-input:focus {
  border-color: #ef5350;
}

.answer-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 20px;
  border: none;
  border-radius: 10px;
  font-size: 1em;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
}

.btn-primary {
  background: #c62828;
  color: white;
}

.btn-primary:hover {
  background: #b71c1c;
  transform: translateY(-1px);
}

.btn-secondary {
  background: #555;
  color: white;
}

.btn-secondary:hover {
  background: #444;
  transform: translateY(-1px);
}

body.dark .btn-secondary {
  background: #555;
}

.result-section {
  margin-top: 8px;
}

.result-section.hidden {
  display: none;
}

.answer-section.hidden {
  display: none;
}

.result-message {
  font-size: 1.2em;
  font-weight: 600;
  margin-bottom: 12px;
}

.result-message.correct {
  color: #2e7d32;
}

body.dark .result-message.correct {
  color: #81c784;
}

.result-message.wrong {
  color: #c62828;
}

body.dark .result-message.wrong {
  color: #ef5350;
}

.explanation {
  margin-bottom: 20px;
  line-height: 1.5;
  color: #555;
}

body.dark .explanation {
  color: #aaa;
}

.start-screen {
  text-align: center;
  padding: 20px 0;
}

.start-screen.hidden {
  display: none;
}

.riddle-card.hidden {
  display: none;
}

.intro {
  margin-bottom: 20px;
  line-height: 1.5;
  color: #555;
}

body.dark .intro {
  color: #aaa;
}

.hidden {
  display: none !important;
}