body{
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}
.contenedor{
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    border: 1px solid black;
    width: 40vw;
    height: 20vw;
    border-radius: 20px;
}
.botones{
    display: flex;
    justify-content: space-evenly;
    width: 40vw;
}
button {
    padding: 10px 20px;
    background-color: #645b5b;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
  }
  
  button:hover {
    background-color: #000000;
    box-shadow: 0 4px 10px rgba(76, 175, 80, 0.2);
  }
  
  button:active {
    transform: scale(0.98);
  }
  
input {
    padding: 10px 15px;
    border: 2px solid #ccc;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    outline: none;
    width: 100%;
    max-width: 300px;
    box-sizing: border-box;
  }
  
  input:focus {
    border-color: #000000;
    box-shadow: 0 0 8px rgba(76, 175, 80, 0.3);
  }
.container-respuesta{
    width: 30vw;
    height: 15vw;
    text-align: center;
    border-radius: 20px;
}
.container-flash-card {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 20px;
    justify-content: center;
}
.container-respuesta {
    text-align: center;
    background-color: #f4f4f4;
    border-left: 6px solid #000000;
    border-radius: 12px;
    padding: 20px;
    width: 25vw;
    height: 10vw;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease;
  }
  
  .container-respuesta:hover {
    transform: scale(1.02);
  }
  
  .container-respuesta h2 {
    margin-top: 0;
    font-size: 20px;
    color: #333;
  }
  
  .container-respuesta .pregunta {
    font-size: 1.8vw;
    color: black;
    cursor: pointer;
    margin-top: 10px;
    margin-bottom: 10px;
  }
  
  #respuesta-oculta {
    font-size: 1.8vw;
    color: black;
    transition: opacity 0.3s ease;
  }
.oculta{
    display: none;
    opacity: 0;
}
.pregunta{
    cursor: pointer;
}