body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background-color: #121212;
  color: #eee;
  transition: background 0.3s, color 0.3s;
}
header, section {
  padding: 2rem;
}
h1, h2 {
  color: #00ffe0;
}
a {
  color: #ffc107;
}

.galeria {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.galeria img {
  max-width: 100%;
  width: 30%;
  border-radius: 6px;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease;
}
.galeria img.visible {
  opacity: 1;
  transform: translateY(0);
}

form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 1rem;
}
form input, form textarea {
  padding: 10px;
  border: none;
  border-radius: 4px;
}
form button {
  padding: 10px;
  background: #00ffe0;
  color: #000;
  font-weight: bold;
  border: none;
  cursor: pointer;
}

#modoOscuroToggle {
  position: fixed;
  bottom: 10px;
  right: 10px;
  background: #333;
  color: white;
  padding: 10px;
  border: none;
  border-radius: 20px;
}