#yt-thumbnail-tool{--yt-ink:#171717;--yt-muted:#858990;--yt-line:#e9e6df;--yt-red:#ff493d;max-width:1180px;margin:20px auto;background:#fff;border:1px solid var(--yt-line);border-radius:28px;overflow:hidden;color:var(--yt-ink);box-shadow:0 14px 38px rgba(28,25,20,.08);font-family:inherit}
#yt-thumbnail-tool *{box-sizing:border-box}
#yt-thumbnail-tool .yt-browserbar{height:55px;padding:0 18px;display:flex;align-items:center;gap:7px;border-bottom:1px solid var(--yt-line);background:#fff}
#yt-thumbnail-tool .yt-dot{width:10px;height:10px;border-radius:50%;display:inline-block}
#yt-thumbnail-tool .yt-red{background:#ff9c91}#yt-thumbnail-tool .yt-yellow{background:#ffd27e}#yt-thumbnail-tool .yt-green{background:#8bd7b0}
#yt-thumbnail-tool .yt-address{display:inline-flex;align-items:center;gap:7px;margin-left:5px;padding:5px 9px;border-radius:6px;background:#f5f3ef;color:#60636a;font-size:12px}
#yt-thumbnail-tool .yt-playmark{display:inline-grid;place-items:center;width:15px;height:12px;border-radius:3px;background:#f44;color:#fff;font-size:8px}
#yt-thumbnail-tool .yt-ready{font-size:12px;color:#169b61;margin-left:5px}
#yt-thumbnail-tool .yt-layout{display:grid;grid-template-columns:1.2fr 1fr;min-height:430px}
#yt-thumbnail-tool .yt-preview-column{padding:24px;border-right:1px solid var(--yt-line);min-width:0}
#yt-thumbnail-tool .yt-res-column{padding:24px 22px;min-width:0}
#yt-thumbnail-tool .yt-label{display:block;font-size:13px;font-weight:650;margin:0 0 8px}
#yt-thumbnail-tool .yt-inputrow{display:flex;gap:9px}
#yt-thumbnail-tool #ytVideoUrl{min-width:0;flex:1;height:44px;border:1px solid #e1ddd5;border-radius:9px;padding:0 12px;font:inherit;font-size:13px;color:#202020;background:#fff;outline:none}
#yt-thumbnail-tool #ytVideoUrl:focus{border-color:#ff776d;box-shadow:0 0 0 3px rgba(255,73,61,.1)}
#yt-thumbnail-tool button{font:inherit;cursor:pointer;transition:background .15s,transform .15s}
#yt-thumbnail-tool button:disabled{opacity:.45;cursor:not-allowed}
#yt-thumbnail-tool .yt-primary{border:0;border-radius:9px;padding:0 16px;background:#ff493d;color:#fff;font-weight:650;font-size:13px;white-space:nowrap}
#yt-thumbnail-tool .yt-primary:hover,#yt-thumbnail-tool .yt-download-all:hover{background:#ed382e}
#yt-thumbnail-tool .yt-error{min-height:18px;margin:7px 0 4px;color:#d12e25;font-size:12px}
#yt-thumbnail-tool .yt-preview-wrap{height:clamp(210px,27vw,330px);position:relative;border-radius:12px;overflow:hidden;background:#f5f4f1;border:1px solid #eee9e1;display:grid;place-items:center}
#yt-thumbnail-tool #ytPreview{display:block;width:100%;height:100%;object-fit:contain;background:#f8f7f4}
#yt-thumbnail-tool .yt-preview-empty{display:flex;flex-direction:column;align-items:center;gap:9px;text-align:center;color:#777;padding:20px}
#yt-thumbnail-tool .yt-empty-icon{width:48px;height:48px;border-radius:50%;background:#242424;color:white;display:grid;place-items:center;font-size:18px;padding-left:3px}
#yt-thumbnail-tool .yt-preview-empty strong{font-size:14px;color:#555}
#yt-thumbnail-tool .yt-preview-empty small{font-size:12px}
#yt-thumbnail-tool .yt-resolution-chip{position:absolute;top:12px;left:12px;background:rgba(20,20,20,.8);color:#fff;border-radius:5px;padding:5px 8px;font-size:10px;font-weight:700}
#yt-thumbnail-tool .yt-res-heading{display:flex;justify-content:space-between;align-items:center;color:#858990;font-size:12px;font-weight:700;letter-spacing:.035em;margin:2px 0 14px}
#yt-thumbnail-tool .yt-res-heading small{font-size:11px;font-weight:400;letter-spacing:0}
#yt-thumbnail-tool .yt-resolution-list{display:flex;flex-direction:column;gap:7px}
#yt-thumbnail-tool .yt-resolution-item{display:grid;grid-template-columns:66px minmax(0,1fr) 38px;align-items:center;gap:12px;padding:9px 10px;border:1px solid transparent;border-radius:12px;min-height:62px}
#yt-thumbnail-tool .yt-resolution-item.active{background:#fff0ed;border-color:#ffc4bb}
#yt-thumbnail-tool .yt-resolution-item img{width:64px;height:38px;object-fit:cover;border-radius:5px;border:1px solid #eee}
#yt-thumbnail-tool .yt-res-info{min-width:0}
#yt-thumbnail-tool .yt-res-name{font-size:13px;font-weight:600;display:flex;align-items:center;gap:8px;white-space:nowrap}
#yt-thumbnail-tool .yt-res-badge{font-size:9px;color:#e54a3f;background:#ffe0db;border-radius:4px;padding:3px 5px;font-weight:700}
#yt-thumbnail-tool .yt-res-dim{font-size:11px;color:#858990;margin-top:5px}
#yt-thumbnail-tool .yt-download-one{width:36px;height:36px;border:1px solid #e7e1d8;background:#fff;border-radius:9px;color:#353535;font-size:18px;display:grid;place-items:center}
#yt-thumbnail-tool .yt-resolution-item.active .yt-download-one{background:#ff493d;border-color:#ff493d;color:#fff}
#yt-thumbnail-tool .yt-download-one:hover{border-color:#ff493d;color:#ff493d}
#yt-thumbnail-tool .yt-resolution-item.active .yt-download-one:hover{color:#fff;background:#ed382e}
#yt-thumbnail-tool .yt-empty-list{padding:20px 10px;text-align:center;color:#969696;font-size:12px}
#yt-thumbnail-tool .yt-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:14px}
#yt-thumbnail-tool .yt-copy,#yt-thumbnail-tool .yt-download-all{height:40px;border-radius:10px;font-size:12px;font-weight:650}
#yt-thumbnail-tool .yt-copy{background:#fff;border:1px solid #e3ddd3;color:#222}
#yt-thumbnail-tool .yt-copy:hover{background:#f8f6f2}
#yt-thumbnail-tool .yt-download-all{background:#151515;border:1px solid #151515;color:#fff}
#yt-thumbnail-tool .yt-footnote{font-size:11px;line-height:1.5;color:#969696;margin:13px 0 0}
@media(max-width:760px){#yt-thumbnail-tool{border-radius:16px;margin:14px 0}#yt-thumbnail-tool .yt-layout{grid-template-columns:1fr}#yt-thumbnail-tool .yt-preview-column{border-right:0;border-bottom:1px solid var(--yt-line);padding:17px}#yt-thumbnail-tool .yt-res-column{padding:18px 14px}#yt-thumbnail-tool .yt-browserbar{height:48px}#yt-thumbnail-tool .yt-inputrow{flex-direction:column}#yt-thumbnail-tool .yt-primary{height:42px}#yt-thumbnail-tool .yt-preview-wrap{height:auto;aspect-ratio:16/9}#yt-thumbnail-tool .yt-resolution-item{grid-template-columns:60px minmax(0,1fr) 36px;gap:9px}#yt-thumbnail-tool .yt-resolution-item img{width:58px;height:35px}}