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

body {
  background: #121212;
  color: #f0f0f0;
}

.app {
  background: #1e1e1e;
  width: 90%;
  max-width: 700px;
  margin: 100px auto;
  border-radius: 10px;
  padding: 2rem;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.app h1 {
  font-size: 28px;
  color: #19bc70;
  text-align: center;
  margin-bottom: 20px;
  border-bottom: 2px solid #19bc70;
  padding-bottom: 10px;
}

.quiz {
  padding-top: 1.5rem;
}

#question {
  font-size: 20px;
  margin-bottom: 20px;
  color: #ffffff;
}

#answer-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.btn {
  background: #2a2a2a;
  color: #fff;
  border: 1px solid #444;
  padding: 12px;
  border-radius: 6px;
  text-align: left;
  cursor: pointer;
  transition: background 0.3s;
}

.btn:hover:not([disabled]) {
  background-color: #19bc70;
  color: #fff;
  border-color: #19bc70;
}

.btn:disabled {
  opacity: 0.6;
  cursor: default;
}

#next-btn {
  background: #19bc70;
  color: white;
  border: none;
  padding: 12px 20px;
  margin: 20px auto 0;
  border-radius: 6px;
  cursor: pointer;
  display: none;
  font-weight: bold;
}

#next-btn:hover {
  background-color: #15995d;
}

.correct {
  background: #28a745 !important;
}

.incorrect {
  background: #dc3545 !important;
}

.btn-exit {
  display: inline-block;  /* Cambia esto */
  width: auto;            /* Evita que se expanda al 100% */
  padding: 12px 32px;
  background: #e74c3c;
  color: white;
  text-align: center;
  text-decoration: none;
  border-radius: 12px;
  font-weight: bold;
  font-size: 18px;
  margin: 2rem auto;
  transition: background 0.3s ease;
}


.btn-exit:hover {
  background-color: #c0392b;
}