:root {
  --primary-color: #1a73e8;
  --secondary-color: #f0f0f0;
  --background-color: #ffffff;
  --button-hover: #ffeb3b;
  --button-confirmed: #fdd835;
  --correct-color: green;
  --wrong-color: red;
  --font-color: #333;
  --border-radius: 0.5rem;
  --transition-speed: 0.3s;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background-color: var(--secondary-color);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  color: var(--font-color);
}

header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #1a73e8;
  color: white;
  padding: 1rem 2rem;
  font-size: 1.125rem;
  font-weight: bold;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  z-index: 100;
  height: auto;
}

#config-btn {
  background: transparent;
  border: none;
  font-size: 1.3rem;
  color: white;
  cursor: pointer;
}

#timer-display {
  font-family: monospace;
  font-size: 1.125rem;
}

.hidden {
  display: none;
}

/* Estilo básico para el modal */
#config-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 9999;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

#config-modal.active {
  visibility: visible;
  opacity: 1;
}


#config-modal::before {
  content: "";
  position: fixed;
  top: 50;
  left: 50;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.5); /* Fondo oscuro */
  z-index: -1; /* Fondo detrás del modal */
}

#config-modal .modal-content {
  background-color: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  max-width: 500px;
  width: 90%;
  text-align: left;
}

#config-modal h2 {
  margin-top: 0;
}

#config-modal label {
  display: block;
  margin: 0.5rem 0;
  font-size: 1rem;
}

#config-modal input[type="radio"] {
  margin-right: 0.5rem;
}

#config-modal button {
  margin-top: 1.5rem;
  padding: 0.5rem 1rem;
  background-color: #1a73e8;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
}

#config-modal button:hover {
  background-color: #155ab6;
}

#quiz-container {
  background-color: var(--background-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  width: 90%;
  max-width: 1200px;
  margin: 2rem auto 2rem;
}

#question-container {
  margin-bottom: 1rem;
}

#question-text {
  font-size: 1.1rem;
  margin-bottom: 0.8rem;
  white-space: pre-line;
}

#selection-instruction {
  font-weight: bold;
  color: #666;
}

#code-container {
  font-family: monospace;
  background-color: #f4f4f4;
  padding-left: 1rem;
  border-radius: var(--border-radius);
  margin-bottom: 1.5rem;
  white-space: pre-wrap;
  color: var(--font-color);
  border: 1px solid #ddd;
}

#options-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.option-btn {
  background-color: var(--primary-color);
  color: white;
  padding: 0.75rem 1rem;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 1rem;
  transition: background-color var(--transition-speed);
}

.option-btn:hover {
  background-color: var(--button-hover);
  color: black
}

#explanation-container {
  font-size: 1rem;
  font-weight: bold;
  padding: 0.5rem;
  border-radius: var(--border-radius);
  margin-top: 0.5rem;
}

.green {
  color: var(--correct-color);
}

.red {
  color: var(--wrong-color);
}

#confirm-btn,
#next-btn {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  border-radius: var(--border-radius);
  cursor: pointer;
  border: none;
}

#confirm-btn {
  margin-top: 0rem;
  padding: 0.5rem 1rem;
  font-size: 1rem;
  display: block;
  margin-left: 27vw;
}

#next-btn {
  background-color: var(--primary-color);
  color: white;
  margin-left: 27vw;
}

#next-btn:hover {
  background-color: #0056b3;
}

#next-button-container,
#confirm-button-container {
  text-align: center;
  margin-top: 0.5rem;
}