body {
  margin: 0;
  font-family: Arial;
  background: #0a0a0a;
  color: white;
}
header {
  background: black;
  padding: 15px;
  text-align: center;
}
header input {
  margin-top: 10px;
  padding: 10px;
  width: 60%;
  border-radius: 20px;
  border: none;
}
nav {
  text-align: center;
  margin: 10px;
}
nav button {
  margin: 5px;
  padding: 10px 15px;
  background: red;
  border: none;
  color: white;
  border-radius: 10px;
  cursor: pointer;
}
#channelList {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 15px;
  padding: 20px;
}
.card {
  background: #111;
  padding: 20px;
  border-radius: 15px;
  text-align: center;
  box-shadow: 0 0 10px red;
}
.card button {
  padding: 10px;
  background: red;
  border: none;
  color: white;
  border-radius: 10px;
  cursor: pointer;
}
video {
  width: 90%;
  margin: 20px;
  border-radius: 15px;
}