:root {
  --primary-color: #42b983;
  --bg-dark: #121212;
  --bg-light: #f0f0f0;
  --text-light: #fff;
  --text-dark: #000;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  transition: background .3s, color .3s;
}

body.dark {
  background-color: var(--bg-dark);
  color: var(--text-light);
}

body.light {
  background-color: var(--bg-light);
  color: var(--text-dark);
}

header {
  display: flex;
  align-items: center;
  padding: 10px;
  background-color: var(--primary-color);
  color: white;
}

header #logo {
  height: 40px;
  margin-right: 10px;
}

#search {
  margin-left: auto;
  padding: 6px 10px;
  border: none;
  border-radius: 5px;
}

#categories {
  display: flex;
  overflow-x: auto;
  padding: 10px;
  background: rgba(0, 0, 0, 0.1);
}
#categories button {
  margin-right: 5px;
  padding: 5px 10px;
}

.channel-card {
  border: 1px solid #ccc;
  padding: 10px;
  margin: 10px;
  display: inline-block;
  width: 200px;
  text-align: center;
  border-radius: 5px;
  background: white;
  color: black;
}
body.dark .channel-card {
  background: #1e1e1e;
  color: white;
}

.channel-card img {
  max-width: 100%;
  max-height: 100px;
}