.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 24px;
}

.controls {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.statusBar {
  display: flex;
  gap: 24px;
  font-weight: bold;
  margin-top: 10px;
}

.equationBox {
  font-size: 36px;
  font-weight: 700;
  padding: 20px 32px;
  border-radius: 12px;
  border: 2px solid #ddd;
  min-width: 360px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
}

/* .buttons {
  display: flex;
  gap: 16px;
  margin-top: 10px;
} */

.btn {
  padding: 12px 20px;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 700;
  font-size: 18px;
}

.true { background: #16a34a; color: white; }
.false { background: #dc2626; color: white; }
.neutral { background: #334155; color: white; }

.radioGroup {
  display: flex;
  gap: 8px;
  align-items: center;
}

.input {
  font-size: 28px;
  font-weight: 600;
  text-align: center;
  padding: 10px 16px;
  margin-left: 12px;
  width: 120px;
  border: 2px solid #aaa;
  border-radius: 10px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, color 0.2s;
}

.input:focus {
  border-color: #2563eb;
  box-shadow: 0 0 6px rgba(37, 99, 235, 0.5);
}

.wrong {
  color: #dc2626;
  border-color: #dc2626;
}

.menuButton {
  margin-top: 12px;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: white;
  border: none;
  padding: 12px 24px;
  font-size: 1.1rem;
  font-weight: bold;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.menuButton:hover {
  background: linear-gradient(135deg, #2563eb, #1e40af);
  transform: translateY(-2px);
}

.overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.7);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000;
}

.completionMessage {
  background: white;
  padding: 30px;
  border-radius: 16px;
  text-align: center;
  max-width: 400px;
  width: 90%;
  box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}

.finalStats {
  margin: 20px 0;
  font-size: 1.2rem;
}

.resetButton {
  background: linear-gradient(135deg, #22c55e, #16a34a);
  color: white;
  border: none;
  padding: 12px 24px;
  font-size: 1rem;
  font-weight: bold;
  border-radius: 10px;
  cursor: pointer;
  margin-bottom: 12px;
}

.resetButton:hover {
  background: linear-gradient(135deg, #16a34a, #15803d);
}

@media (max-width: 400px) {
  .equationBox {
    min-width: auto;
    font-size: 24px;
    padding: 12px 16px;
  }

  .input {
    width: 80px;
    font-size: 20px;
  }

  .btn {
    font-size: 16px;
    padding: 10px 14px;
  }
}

.hintBox {
  margin-top: 20px;
  padding: 16px;
  border: 2px dashed #f59e0b;
  border-radius: 12px;
  background: #fffbea;
  font-size: 16px;
  max-width: 500px;
  text-align: left;
  line-height: 1.6;
}

.hintBox h3 {
  margin-bottom: 10px;
  color: #b45309;
}

.hintBox pre {
  background: #fef3c7;
  padding: 8px 12px;
  border-radius: 8px;
  font-family: monospace;
  font-size: 14px;
  overflow-x: auto;
}

.btn:focus-visible, .menuButton:focus-visible, .resetButton:focus-visible { outline: 3px solid #f59e0b; outline-offset: 2px; }

.infoBox {
  margin-top: 30px;
  padding: 20px;
  border-radius: 12px;
  background: #f9fafb;
  text-align: left;
  line-height: 1.6;
  font-size: 15px;
}

.infoBox h2 {
  margin-top: 20px;
  color: #1e40af;
}
