.search-input::placeholder {
  color: #888;
}

@media (max-width: 768px) {
  .search-input {
    width: 150px;
  }
  .content {
    flex-direction: column;
  }
  .sidebar {
    display: none;
  }
  .video-grid {
    grid-template-columns: 1fr;
  }
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;

}

.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background-color: #ff0000;
  color: #fff;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
}

.search-input {
  padding: 6px 12px;
  border: none;
  border-radius: 2px;
}

.content {
  display: flex;
  flex: 1;
}

.sidebar {
  width: 200px;
  background-color: #f9f9f9;
  padding: 20px;
}

.sidebar ul {
  list-style: none;
  padding: 0;
}

.sidebar li {
  margin-bottom: 10px;
  cursor: pointer;
}

.sidebar li.active {
  font-weight: bold;
}

.main-content {
  flex: 1;
  padding: 20px;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}

body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  color: #333;
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal.open {
  display: flex;
}

.modal-content {
  position: relative;
  width: 80%;
  max-width: 800px;
}

#video-player {
  width: 100%;
  height: 450px;
}

.close-button {
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
}

.video-card {
  background-color: #fff;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.video-card:hover {
  transform: scale(1.04);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.video-card img {
  width: 100%;
  display: block;
}

.video-info {
  padding: 10px;
}

.video-title {
  font-size: 1rem;
  margin-bottom: 4px;
  color: #000;
}

.search-input {
  width: 300px;
  max-width: 100%;
  padding: 8px 12px;
  border-radius: 4px;
  border: none;
  outline: none;
}

.search-input::placeholder {
  color: #888;
}