body { font-family: Arial, sans-serif; background: #f2f2f2; margin:0; padding:0;}
.container { max-width: 1000px; margin: auto; padding: 20px;}
.header { text-align: center;}
.tabs { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 20px;}
.tab { padding: 10px 20px; background: #007bff; color: #fff; border: none; cursor: pointer; border-radius: 5px;}
.tab.active { background: #0056b3;}