header {
            background-color: #fff;
            padding: 15px 0;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        }

        header .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        header .logo {
            display: flex;
            align-items: center;
        }

        header .logo img {
            width: 30px;
            margin-right: 10px;
        }

        header .logo span {
            font-size: 1.5em;
            font-weight: bold;
            color: #333;
        }

        header nav ul {
            list-style: none;
            display: flex;
            gap: 20px;
        }

        header nav ul li a {
            text-decoration: none;
            color: #666;
            font-weight: 500;
        }

        header nav ul li a.active {
            font-weight: bold;
            color: #333;
        }

        header .search-bar {
            display: flex;
            align-items: center;
            background-color: #eee;
            border-radius: 20px;
            padding: 8px 15px;
            width: 300px;
            border: 1px solid #ccc;
        }

        header .search-bar input {
            border: none;
            outline: none;
            background: none;
            flex-grow: 1;
            font-size: 1em;
            color: #333;
            padding: 0;
        }

        header .search-bar input::placeholder {
            color: #777;
        }

        header .search-bar i {
            color: #777;
            margin-right: 10px;
        }