.yt-thumb-workspace{
  --yt-red:#ef2636;
  --yt-red-dark:#c81022;
  --yt-blue:#126fd4;
  --yt-text:#10233a;
  --yt-muted:#60728a;
  --yt-border:#d9e3ef;
  --yt-panel:#ffffff;
  --yt-soft:#f4f8fc;
  border:1px solid var(--yt-border);
  border-radius:8px;
  background:var(--yt-panel);
  box-shadow:0 16px 38px rgba(26,50,78,.09);
  overflow:hidden;
}

.yt-thumb-grid{display:grid;grid-template-columns:minmax(280px,34%) minmax(0,66%);min-height:570px}
.yt-thumb-input-panel,.yt-thumb-output-panel{min-width:0;background:var(--yt-panel)}
.yt-thumb-input-panel{border-right:1px solid var(--yt-border)}
.yt-thumb-panel-head{height:54px;padding:0 15px;display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--yt-border);background:#f9fbfd;color:var(--yt-text);font-size:.82rem;font-weight:850;letter-spacing:.01em}
.yt-thumb-panel-head>span{display:flex;align-items:center;gap:9px}.yt-thumb-panel-head>span i{color:var(--yt-red);font-size:1rem}
.yt-thumb-panel-head button{border:1px solid #cbd8e7;border-radius:4px;background:#fff;color:#235f9c;min-height:32px;padding:0 10px;font:800 .73rem/1 Inter,system-ui;cursor:pointer}
.yt-thumb-panel-head button:hover{border-color:#75a8dc;background:#edf6ff}
.yt-thumb-input-body{padding:18px;display:flex;flex-direction:column;gap:12px}
.yt-thumb-input-body>label{color:var(--yt-text);font-size:.76rem;font-weight:850}
.yt-thumb-url-control{min-height:48px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:8px;border:1px solid #b9c9da;border-radius:5px;background:#fff;padding:0 7px 0 12px;transition:border-color .18s,box-shadow .18s}
.yt-thumb-url-control:focus-within{border-color:#397fc6;box-shadow:0 0 0 3px rgba(18,111,212,.13)}
.yt-thumb-url-control[data-tone="success"]{border-color:#23a76f}.yt-thumb-url-control[data-tone="error"]{border-color:#d73c4c;box-shadow:0 0 0 3px rgba(215,60,76,.1)}
.yt-thumb-url-control>i{color:#72869d}.yt-thumb-url-control input{width:100%;min-width:0;border:0;outline:0;background:transparent;color:var(--yt-text);font:650 .82rem/1.4 Inter,system-ui}
.yt-thumb-url-control button{width:34px;height:34px;border:0;border-radius:4px;background:#eef4fa;color:#355d85;cursor:pointer}.yt-thumb-url-control button:hover{background:#dfeefa;color:#0e60ae}
.yt-thumb-field-help{margin:-4px 0 0;color:var(--yt-muted);font-size:.69rem;line-height:1.45}.yt-thumb-url-control[data-tone="success"]+.yt-thumb-field-help{color:#15764f}.yt-thumb-url-control[data-tone="error"]+.yt-thumb-field-help{color:#bd2838}
.yt-thumb-primary{min-height:44px;border:0;border-radius:4px;background:linear-gradient(135deg,var(--yt-red),var(--yt-red-dark));box-shadow:0 9px 22px rgba(213,25,44,.22);color:#fff;display:flex;align-items:center;justify-content:center;gap:8px;font:850 .82rem/1 Inter,system-ui;cursor:pointer}
.yt-thumb-primary:hover{filter:brightness(.97);transform:translateY(-1px)}.yt-thumb-primary:disabled{opacity:.65;cursor:wait;transform:none}.yt-thumb-primary.is-loading i{animation:yt-thumb-pulse .8s ease-in-out infinite alternate}
@keyframes yt-thumb-pulse{to{transform:scale(1.16)}}
.yt-thumb-video-info{display:grid;grid-template-columns:minmax(0,1fr) auto auto;align-items:center;gap:7px;border:1px solid #bcdacb;border-radius:5px;background:#f0faf5;padding:10px}
.yt-thumb-video-info[hidden]{display:none}.yt-thumb-video-info>div{min-width:0}.yt-thumb-video-info span{display:block;color:#547163;font-size:.62rem;font-weight:750}.yt-thumb-video-info strong{display:block;margin-top:2px;color:#13432f;font:850 .82rem/1.3 ui-monospace,SFMono-Regular,Menlo,monospace;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.yt-thumb-video-info button,.yt-thumb-video-info a{min-height:31px;padding:0 8px;border:1px solid #9dc9b3;border-radius:4px;background:#fff;color:#146846;display:inline-flex;align-items:center;gap:5px;text-decoration:none;font:800 .65rem/1 Inter,system-ui;cursor:pointer}
.yt-thumb-video-info button:hover,.yt-thumb-video-info a:hover{border-color:#399469;background:#e5f6ed}
.yt-thumb-support{padding-top:4px}.yt-thumb-support>strong{display:block;margin-bottom:7px;color:var(--yt-text);font-size:.68rem}.yt-thumb-support>div{display:flex;gap:5px;flex-wrap:wrap}.yt-thumb-support span{padding:5px 7px;border:1px solid #d6e0eb;border-radius:3px;background:#f7f9fc;color:#5a6c82;font-size:.61rem;font-weight:750}
.yt-thumb-rights-note{margin-top:4px;padding:10px;border-left:3px solid #e0a020;background:#fff8e9;display:flex;align-items:flex-start;gap:9px;color:#6a4b0d}.yt-thumb-rights-note>i{margin-top:2px}.yt-thumb-rights-note p{margin:0}.yt-thumb-rights-note strong,.yt-thumb-rights-note span{display:block}.yt-thumb-rights-note strong{font-size:.69rem}.yt-thumb-rights-note span{margin-top:2px;font-size:.63rem;line-height:1.45}
.yt-thumb-head-actions button{display:inline-flex;align-items:center;gap:6px}.yt-thumb-empty{min-height:515px;padding:28px;display:grid;place-items:center;align-content:center;text-align:center;background:linear-gradient(145deg,#fbfdff,#f0f5fa)}
.yt-thumb-empty-icon{width:76px;height:60px;border:1px solid #f4bdc3;border-radius:10px;background:#fff1f2;color:var(--yt-red);display:grid;place-items:center;font-size:2rem;box-shadow:0 9px 22px rgba(105,30,38,.08)}
.yt-thumb-empty h2{margin:14px 0 5px;color:var(--yt-text);font-size:1.04rem}.yt-thumb-empty p{max-width:410px;margin:0;color:var(--yt-muted);font-size:.76rem;line-height:1.55}.yt-thumb-empty>div:last-child{margin-top:14px;display:flex;gap:6px;flex-wrap:wrap;justify-content:center}.yt-thumb-empty>div:last-child span{padding:5px 8px;border:1px solid #d3deea;border-radius:3px;background:#fff;color:#5d6e82;font-size:.61rem;font-weight:800}
.yt-thumb-results[hidden]{display:none}.yt-thumb-selected{border-bottom:1px solid var(--yt-border);background:#0d1725}.yt-thumb-selected-stage{min-height:286px;max-height:430px;display:grid;place-items:center;position:relative;overflow:hidden;background-color:#111d2d;background-image:linear-gradient(45deg,rgba(255,255,255,.035) 25%,transparent 25%),linear-gradient(-45deg,rgba(255,255,255,.035) 25%,transparent 25%),linear-gradient(45deg,transparent 75%,rgba(255,255,255,.035) 75%),linear-gradient(-45deg,transparent 75%,rgba(255,255,255,.035) 75%);background-size:24px 24px;background-position:0 0,0 12px,12px -12px,-12px 0}
.yt-thumb-selected-stage img{display:block;max-width:100%;max-height:430px;width:auto;height:auto;object-fit:contain}.yt-thumb-loading{display:flex;align-items:center;justify-content:center;gap:9px;color:#b9c8da;font-size:.76rem;font-weight:750}.yt-thumb-loading i{color:#ff4b58}
.yt-thumb-selected-bar{min-height:74px;padding:10px 12px;display:flex;align-items:center;justify-content:space-between;gap:12px;background:#101f31;color:#fff}.yt-thumb-selected-bar>div:first-child{min-width:0}.yt-thumb-selected-bar span,.yt-thumb-selected-bar strong,.yt-thumb-selected-bar small{display:block}.yt-thumb-selected-bar span{color:#9fb4cc;font-size:.61rem;font-weight:800;text-transform:uppercase;letter-spacing:.05em}.yt-thumb-selected-bar strong{margin-top:2px;font-size:.87rem}.yt-thumb-selected-bar small{margin-top:2px;color:#8ca3bc;font-size:.61rem}
.yt-thumb-selected-actions{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}.yt-thumb-selected-actions button,.yt-thumb-selected-actions a{min-height:34px;padding:0 10px;border:1px solid #38516e;border-radius:4px;background:#182c43;color:#dce9f8;display:inline-flex;align-items:center;justify-content:center;gap:6px;text-decoration:none;font:800 .67rem/1 Inter,system-ui;cursor:pointer}.yt-thumb-selected-actions button:hover,.yt-thumb-selected-actions a:hover{border-color:#6793c2;background:#213d5d}.yt-thumb-selected-actions .is-primary{border-color:#ef3948;background:#e31e31;color:#fff}.yt-thumb-selected-actions .is-primary:hover{border-color:#ff6672;background:#f12d40}.yt-thumb-selected-actions [aria-disabled="true"],.yt-thumb-selected-actions button:disabled{opacity:.42;pointer-events:none}
.yt-thumb-browser-head{padding:10px 12px;display:flex;align-items:center;justify-content:space-between;gap:10px;border-bottom:1px solid var(--yt-border);background:#f7fafc}.yt-thumb-browser-head>span{color:var(--yt-muted);font-size:.64rem;font-weight:750}.yt-thumb-tabs{display:flex;gap:4px}.yt-thumb-tabs button{min-height:32px;padding:0 9px;border:1px solid #c9d6e3;border-radius:4px;background:#fff;color:#48637f;font:800 .66rem/1 Inter,system-ui;cursor:pointer}.yt-thumb-tabs button span{margin-left:4px;color:#71869c}.yt-thumb-tabs button.is-active{border-color:#317bc1;background:#eaf4ff;color:#075aab}.yt-thumb-tabs button.is-active span{color:#075aab}
.yt-thumb-card-grid{padding:12px;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;background:#f1f5f9}.yt-thumb-card{min-width:0;border:1px solid #d3dee9;border-radius:5px;background:#fff;overflow:hidden;transition:border-color .18s,box-shadow .18s}.yt-thumb-card.is-selected{border-color:#1b78cf;box-shadow:0 0 0 2px rgba(27,120,207,.13)}.yt-thumb-card.is-unavailable{opacity:.66}.yt-thumb-card-select{width:100%;padding:0;border:0;background:#fff;text-align:left;cursor:pointer}.yt-thumb-card-select:disabled{cursor:not-allowed}.yt-thumb-card-image{height:73px;display:grid;place-items:center;position:relative;overflow:hidden;background:#182536}.yt-thumb-card-image img{width:100%;height:100%;object-fit:cover}.yt-thumb-card-image>i{color:#8091a4;font-size:1.2rem}.yt-thumb-card-image em{position:absolute;top:5px;left:5px;padding:3px 5px;border-radius:3px;background:rgba(15,28,44,.88);color:#dce8f5;font:800 .52rem/1 Inter,system-ui;font-style:normal}.yt-thumb-card-image em[data-tone="available"]{background:rgba(10,116,71,.9);color:#fff}.yt-thumb-card-image em[data-tone="unavailable"]{background:rgba(137,43,54,.92);color:#fff}
.yt-thumb-card-copy{min-height:47px;padding:7px 8px;display:block;position:relative}.yt-thumb-card-copy strong,.yt-thumb-card-copy small{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.yt-thumb-card-copy strong{color:var(--yt-text);font-size:.63rem}.yt-thumb-card-copy small{margin-top:3px;color:var(--yt-muted);font-size:.55rem}.yt-thumb-card-check{display:none;position:absolute;right:6px;bottom:6px;color:#1679cf}.yt-thumb-card.is-selected .yt-thumb-card-check{display:block}.yt-thumb-card-actions{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid #e1e8f0}.yt-thumb-card-actions button,.yt-thumb-card-actions a{min-width:0;height:30px;border:0;background:#fbfcfe;color:#45627f;display:flex;align-items:center;justify-content:center;gap:4px;text-decoration:none;font:800 .56rem/1 Inter,system-ui;cursor:pointer}.yt-thumb-card-actions>*+*{border-left:1px solid #e1e8f0}.yt-thumb-card-actions button:hover,.yt-thumb-card-actions a:hover{background:#eaf4ff;color:#075ba9}.yt-thumb-card-actions button:disabled,.yt-thumb-card-actions [aria-disabled="true"]{opacity:.42;pointer-events:none}
.yt-thumb-footer{min-height:54px;padding:9px 12px;border-top:1px solid var(--yt-border);background:#f8fafc;display:flex;align-items:center;justify-content:space-between;gap:12px}.yt-thumb-footer .tool-station-status{color:var(--yt-muted);font-size:.7rem;font-weight:750}.yt-thumb-footer .tool-station-status[data-tone="success"]{color:#107149}.yt-thumb-footer .tool-station-status[data-tone="error"]{color:#bf2638}.yt-thumb-clear{min-height:34px;padding:0 11px;border:1px solid #cbd7e4;border-radius:4px;background:#fff;color:#47627d;display:inline-flex;align-items:center;gap:6px;font:800 .67rem/1 Inter,system-ui;cursor:pointer}.yt-thumb-clear:hover{border-color:#8ca9c7;background:#eef5fb}
body.theme-dark .yt-thumb-workspace{--yt-text:#e8f0fa;--yt-muted:#91a5bc;--yt-border:#293d55;--yt-panel:#101a28;--yt-soft:#152235;background:#101a28;box-shadow:none}
body.theme-dark .yt-thumb-panel-head,body.theme-dark .yt-thumb-browser-head,body.theme-dark .yt-thumb-footer{background:#132033;color:var(--yt-text)}
body.theme-dark .yt-thumb-panel-head button,body.theme-dark .yt-thumb-url-control,body.theme-dark .yt-thumb-video-info button,body.theme-dark .yt-thumb-video-info a,body.theme-dark .yt-thumb-tabs button,body.theme-dark .yt-thumb-clear{background:#17273a;border-color:#344c67;color:#cde2f7}
body.theme-dark .yt-thumb-url-control input{color:#eff6ff}body.theme-dark .yt-thumb-support span{border-color:#32465e;background:#172536;color:#adbed1}body.theme-dark .yt-thumb-video-info{border-color:#285f4b;background:#102b23}body.theme-dark .yt-thumb-video-info strong{color:#b7f0d3}body.theme-dark .yt-thumb-video-info span{color:#82b89f}body.theme-dark .yt-thumb-rights-note{background:#2c2414;color:#e8c679}
body.theme-dark .yt-thumb-empty{background:linear-gradient(145deg,#111c2b,#152235)}body.theme-dark .yt-thumb-empty-icon{border-color:#5b3440;background:#2a1820}body.theme-dark .yt-thumb-empty>div:last-child span{border-color:#34485f;background:#182536;color:#adbed1}
body.theme-dark .yt-thumb-card-grid{background:#0d1724}body.theme-dark .yt-thumb-card,body.theme-dark .yt-thumb-card-select{border-color:#2b4057;background:#142234}body.theme-dark .yt-thumb-card-copy strong{color:#e9f2fc}body.theme-dark .yt-thumb-card-actions{border-color:#2b4057}body.theme-dark .yt-thumb-card-actions button,body.theme-dark .yt-thumb-card-actions a{background:#132033;color:#b8cce1}body.theme-dark .yt-thumb-card-actions>*+*{border-color:#2b4057}body.theme-dark .yt-thumb-tabs button.is-active{border-color:#438dd1;background:#17314b;color:#9ed0ff}body.theme-dark .yt-thumb-tabs button.is-active span{color:#9ed0ff}
@media(max-width:1080px){.yt-thumb-card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.yt-thumb-selected-bar{align-items:flex-start;flex-direction:column}.yt-thumb-selected-actions{width:100%;justify-content:flex-start}}
@media(max-width:860px){.yt-thumb-grid{grid-template-columns:1fr}.yt-thumb-input-panel{border-right:0;border-bottom:1px solid var(--yt-border)}.yt-thumb-empty{min-height:350px}.yt-thumb-selected-stage{min-height:240px}.yt-thumb-card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.yt-thumb-footer{align-items:flex-start;flex-direction:column}.yt-thumb-footer .tool-station-actions,.yt-thumb-clear{width:100%}.yt-thumb-clear{justify-content:center}}
@media(max-width:520px){.yt-thumb-input-body{padding:12px}.yt-thumb-video-info{grid-template-columns:1fr 1fr}.yt-thumb-video-info>div{grid-column:1/-1}.yt-thumb-video-info button,.yt-thumb-video-info a{justify-content:center}.yt-thumb-selected-stage{min-height:190px}.yt-thumb-selected-actions{display:grid;grid-template-columns:1fr 1fr}.yt-thumb-selected-actions .is-primary{grid-column:1/-1}.yt-thumb-browser-head{align-items:flex-start;flex-direction:column}.yt-thumb-browser-head>span{align-self:flex-end}.yt-thumb-tabs{width:100%}.yt-thumb-tabs button{flex:1}.yt-thumb-card-grid{grid-template-columns:1fr 1fr;padding:8px;gap:7px}.yt-thumb-card-image{height:88px}.yt-thumb-card-actions span{display:none}.yt-thumb-footer{padding:9px}.yt-thumb-panel-head{padding:0 12px}}