.sng_preview_modal {display:none;position:fixed;left:0;top:0;width:100%;height:100%;background:rgba(0,0,0,0.65);align-items:center;justify-content:center;z-index:100000;}
.sng_preview_box {position:relative;background:#fff;border-radius:4px;width:92vw;height:90vh;max-width:1100px;max-height:90vh;display:flex;flex-direction:column;overflow:hidden;}
.sng_preview_header {display:flex;align-items:center;justify-content:space-between;padding:8px 12px;background:#f0f0f0;border-bottom:1px solid #ddd;flex-shrink:0;}
.sng_preview_title {font-weight:bold;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:85%;}
.sng_preview_close {border:0;background:#555;color:#fff;padding:4px 10px;cursor:pointer;border-radius:3px;font-size:13px;}
.sng_preview_body {flex:1;overflow:hidden;}
.sng_preview_body iframe {width:100%;height:100%;border:0;display:block;}
.sng_file_preview_btn {margin-left:6px;padding:1px 7px;font-size:12px;border:1px solid #aaa;background:#f5f5f5;cursor:pointer;border-radius:2px;vertical-align:middle;}
.sng_file_preview_btn:hover {background:#e0e8ff;border-color:#669;}