/* --- Reset Básico y Estilos Globales --- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth; /* Permite el scroll suave con JS */
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  color: #fff;
  background-color: #111;
  overflow-x: hidden; /* Previene el scroll horizontal */
}

/* --- Capa de Fondo Fija (Efecto Parallax) --- */
.background-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* Reemplaza esta URL con la imagen que desees */
  background-image: url("images/background2.jpg");
  background-size: cover;
  background-position: center center;
  z-index: -1; /* Se queda detrás de todo */
  filter: brightness(
    0.6
  ); /* Oscurece un poco la imagen para que el texto resalte */
}

/* --- Estructura de Secciones --- */
.trivia-section {
  height: 100vh; /* Cada sección ocupa toda la pantalla */
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem;
}

.content-wrapper {
  max-width: 800px;
  width: 100%;
  background: rgba(0, 0, 0, 0.5);
  padding: 40px;
  border-radius: 15px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

/* --- Estilos de Texto y Títulos --- */
h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
}
h2 {
  font-size: 1rem;
  margin-bottom: 1rem;
}
.lead {
  font-size: 1.25rem;
  opacity: 0.9;
  margin-bottom: 2rem;
}
.fs-4 {
  font-size: 1.5rem;
}
.display-1 {
  font-size: 6rem;
  font-weight: bold;
  color: #39ff14;
}

/* --- Botones y Formularios --- */
.btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  margin: 0.5rem;
}
.btn-primary {
  background-color: #39ff14;
  color: black; /* Mejor contraste con verde neón */
  border-color: #39ff14;
  padding: 12px 28px; /* Ya tiene padding adecuado */
  border-radius: 50px; /* Ya tiene border-radius moderno */
}

.btn-primary:hover {
  background-color: #39ff14;
  border-color: #39ff14;
  box-shadow: 0 0 10px #39ff14;
  transform: scale(1.05);
}
.btn-secondary {
  background-color: #010202;
  color: white;
  border-color: #000000;
}

.btn-secondary:hover {
  background-color: #39ff14;
  border-color: #010102;
  box-shadow: 0 0 10px #39ff14;
  transform: scale(1.03);
}
.btn-success {
  background-color: #39ff14;
  color: rgb(0, 0, 0);
  border-color: #39ff14;
  font-weight: bold;
  padding: 12px 24px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease-in-out;
}

.btn-success:hover {
  background-color: #39ff14;
  border-color: #39ff14;
  box-shadow: 0 0 10px #39ff14;
  transform: scale(1.05);
}
.app-footer {  
  position: static;  
  bottom: auto;  
  left: 0;  
  width: 100%;  
  background: rgba(0, 0, 0, 0.9); 
  color: rgba(156, 163, 175, 0.9);  
  text-align: center;  
  font-size: 0.75rem;  
  padding: 8px 0;  
  z-index: 1000;  
  border-top: 1px solid rgba(255, 255, 255, 0.1);  
}
.form-label {
  display: block;
  font-size: 1.2rem;
  margin-bottom: 1rem;
}
.form-control {
  width: 100%;
  padding: 12px;
  font-size: 1.1rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 8px;
  color: white;
}
.form-control::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

/* --- Trivia y Opciones --- */
#contenedor-trivia {
  transition: opacity 0.5s ease;
}
.d-grid {
  display: grid;
  gap: 1rem;
}
.btn-opcion {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  text-align: left;
  padding: 15px;
  border-radius: 8px;
  font-size: 1.1rem;
  transition: all 0.2s ease;
}
.btn-opcion:hover:not(:disabled) {
  background-color: rgba(255, 255, 255, 0.2);
  transform: scale(1.02);
}
.btn-opcion.correcta {
  background-color: #198754;
  border-color: #198754;
  color: white;
}
.btn-opcion.incorrecta {
  background-color: #dc3545;
  border-color: #dc3545;
  color: white;
}
.btn-opcion:disabled {
  cursor: not-allowed;
}

/* --- Clases de utilidad --- */
.hidden {
  opacity: 0;
  pointer-events: none;
  height: 0;
  overflow: hidden;
}
.fw-bold {
  font-weight: bold;
}

/* --- Modal de Ayuda --- */
.modal {
  display: none;
  position: fixed;
  z-index: 100;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.7);
  animation: fadeInModal 0.5s;
}
.modal-content {
  background-color: #222;
  color: #f1f1f1;
  margin: 15% auto;
  padding: 20px;
  border: 1px solid #888;
  width: 80%;
  max-width: 500px;
  border-radius: 10px;
  text-align: left;
}
.close-button {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
}
.close-button:hover {
  color: white;
}

@keyframes fadeInModal {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}