body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #0a0a0a;
  color: #eee;
}
header {
  text-align: center;
  padding: 60px 20px 20px;
  background-color: #111;
}
header h1 {
  font-size: 3rem;
  color: #9a6eff;
}
header p {
  color: #ccc;
}
section {
  padding: 40px 20px;
  max-width: 900px;
  margin: auto;
}
h2 {
  color: #c799ff;
}
ul {
  list-style: disc;
  margin-left: 20px;
}
.card-preview {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  justify-content: center;
}
.card-preview img {
  width: 180px;
  border: 2px solid #9a6eff;
  border-radius: 10px;
}
.video-container {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
}
.video-container iframe {
  position: absolute;
  top:0;
  left:0;
  width:100%;
  height:100%;
}
footer {
  text-align: center;
  padding: 30px 10px;
  background-color: #111;
  color: #888;
}
footer a {
  color: #9a6eff;
  text-decoration: none;
}