.osm-piece {
    margin-bottom: 30px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
    background: #fafafa;
}

    .osm-piece h3 {
        margin: 0 0 6px 0;
        font-size: 1.3em;
        color: #0073aa;
    }

    .osm-piece p {
        margin: 4px 0;
    }

    .osm-piece .osm-meta {
        font-size: 0.9em;
        color: #555;
    }

.osm-instrument-group {
    margin-bottom: 12px;
}

.osm-file-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 4px;
}

    .osm-file-buttons .button {
        flex: 0 0 auto;
        padding: 8px 12px;
        background: #0073aa;
        color: #fff;
        text-decoration: none;
        border-radius: 4px;
        transition: background 0.2s;
    }

        .osm-file-buttons .button:hover {
            background: #005177;
        }

.osm-download-all {
    margin-top: 6px;
    display: inline-block;
    background: #28a745;
    color: #fff;
    padding: 6px 10px;
    border-radius: 4px;
    text-decoration: none;
}

    .osm-download-all:hover {
        background: #1c7430;
    }