.ad-space {
            background-color: #1a1a1a;
            border: 2px dashed #333;
            padding: 10px;
            margin: 20px 0;
            text-align: center;
            color: #666;
            font-size: 0.9rem;
            box-sizing: content-box;
        }

        .ad-vertical-right {
            width: 160px;
            height: 600px;
            position: fixed;
            right: 20px;
            top: 50%;
            transform: translateY(-50%);
            z-index: 1000;
        }

        .ad-vertical-left {
            width: 160px;
            height: 600px;
            position: fixed;
            left: 20px;
            top: 50%;
            transform: translateY(-50%);
            z-index: 1000;
        }