body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #000;
  color: #fff;
}

header {
  background: #ffcc00; 
  color: #000; 
  padding: 1em 2em;
  text-align: center;
}

nav {
  background: #e6b800; 
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

nav a {
  color: #000; 
  text-decoration: none;
  padding: 1em;
  cursor: pointer;
  font-weight: bold;
}

nav a:hover {
  background: #ccaa00; 
  color: #000;
}

main {
  max-width: 1000px;
  margin: auto;
  padding: 2em;
  background: #1a1a1a;
  min-height: 300px;
  position: relative;
  color: #fff;
}

section {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  display: none; 
}

section.active {
  display: block;
}

section.fade-in {
  opacity: 1;
  transform: translateY(0);
}

  header {
    margin: 0;
    padding: 0;
    line-height: 0;
  }
  header img {
    display: block;
    width: 100%;
    height: auto;
  }

footer {
  background: #000;
  color: #ffcc00;
  text-align: center;
  padding: 1em;
}

.muestra-pestañas {
  display: flex;
  gap: 8px;
  margin: 20px 0 0 0;
  overflow-x: auto;
  scroll-behavior: smooth;
  padding: 0;
  white-space: nowrap;           
}

.muestra-pestañas::-webkit-scrollbar {
  display: none;
}

.muestra-pestaña {
  background: #2a2a2a;
  color: #ffcc00;
  padding: 10px 18px;
  border: 2px solid #ffcc00;
  border-bottom: none;  
  border-radius: 12px 12px 0 0;
  cursor: pointer;
  font-weight: bold;
  transition: all 0.3s ease;
  box-shadow: 0 2px 5px rgba(0,0,0,0.15);
  position: relative;
  z-index: 1;
  flex: 0 0 auto;       
  white-space: nowrap;
}

.muestra-pestaña:hover {
  background: #444;
  color: #ffd633;
}

.muestra-pestaña.active {
  background: #ffcc00;
  color: #222;
  box-shadow: none;
}

.muestra-contenido {
  display: none;
  padding: 20px;
  border: 2px solid #ffcc00;
  border-radius: 0 12px 12px 12px;
  background: #111;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  opacity: 0;
  transition: opacity 0.4s ease;
  margin-top: -2px;  
}

.muestra-contenido.active {
  display: block;
  opacity: 1;
}