:root{
  --bg:#f4f6f8;--card:#fff;--text:#202124;--muted:#5f6368;--border:#ccc;
  --primary:#1a73e8;--danger:#d93025;--disabled:#9aa0a6;--warn-bg:#fef7e0;--warn-text:#7a5a00;
}
@media (prefers-color-scheme: dark){
  :root{--bg:#121416;--card:#1e2124;--text:#e8eaed;--muted:#9aa0a6;--border:#3c4043;--warn-bg:#3a3000;--warn-text:#fdd663}
}
*{box-sizing:border-box}
body{font-family:system-ui,Tahoma,sans-serif;background:var(--bg);margin:0;padding:16px;padding-top:max(16px,env(safe-area-inset-top));color:var(--text)}
.topbar{max-width:640px;margin:0 auto 12px;display:flex;align-items:center;justify-content:space-between;gap:8px}
h1{margin:0;font-size:20px}
.card{background:var(--card);border-radius:12px;padding:16px;max-width:640px;margin:0 auto 16px;box-shadow:0 1px 4px rgba(0,0,0,.1)}
.hint{font-size:14px}
.warn{background:var(--warn-bg);color:var(--warn-text);font-size:14px}
label{display:block;margin:12px 0 4px;font-weight:600;font-size:14px}
.check{display:flex;gap:8px;align-items:center;font-weight:normal;margin-top:16px}
.check input{width:auto}
input[type=text]{width:100%;padding:10px;border:1px solid var(--border);border-radius:8px;font-size:16px;background:var(--card);color:var(--text)}
details{margin-top:14px;border-top:1px solid var(--border);padding-top:10px}
summary{cursor:pointer;font-weight:600;font-size:14px}
button{padding:12px;border:0;border-radius:8px;background:var(--primary);color:#fff;font-size:16px;width:100%;margin-top:14px;cursor:pointer;font-family:inherit}
button:disabled{background:var(--disabled);cursor:not-allowed}
button.danger{background:var(--danger)}
button.ghost{background:transparent;color:var(--primary);border:1px solid var(--primary);width:auto;margin:0;padding:8px 12px;font-size:14px}
button.small{margin-top:10px}
.actions{display:flex;gap:8px}
.actions button{flex:1}
.row{display:flex;justify-content:space-between;font-size:14px;margin-bottom:6px;gap:8px}
#fileText{color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
progress{width:100%;height:10px;margin:4px 0}
#log{background:#111;color:#8bff8b;font-family:monospace;font-size:13px;height:300px;overflow:auto;padding:10px;border-radius:8px;white-space:pre-wrap;direction:ltr;text-align:left;unicode-bidi:plaintext}
small{color:var(--muted)}
footer{text-align:center;padding-bottom:env(safe-area-inset-bottom)}
fieldset.dests{border:1px solid var(--border);border-radius:10px;padding:4px 12px 12px;margin:16px 0 0}
legend{font-weight:600;font-size:14px;padding:0 6px}
.sub{margin:2px 0 6px;padding-inline-start:26px}
.sub[hidden]{display:none}
.acct{align-items:center;margin-top:6px}
#otherStatus{color:var(--muted);font-size:14px;overflow:hidden;text-overflow:ellipsis}
.acct button{margin-inline-start:4px}
button.secondary{background:transparent;color:var(--text);border:1px solid var(--border)}
#dlList{list-style:none;margin:8px 0 0;padding:0}
#dlList li{display:flex;align-items:center;gap:8px;padding:8px 0;border-bottom:1px solid var(--border)}
#dlList li:last-child{border-bottom:0}
#dlList .name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px;direction:ltr;text-align:right}
#dlList .size{color:var(--muted);font-size:12px;white-space:nowrap}
#dlList button{width:auto;margin:0;padding:6px 14px;font-size:14px}
#dlList li.saved button{background:var(--disabled)}
.row.head{align-items:baseline}
.pick{display:flex;gap:6px;align-items:stretch}
.pick input{flex:1;min-width:0}
.pick button{white-space:nowrap}
small.picked{display:block;color:var(--primary);margin-top:4px}
small.picked:empty{display:none}
select{width:100%;padding:10px;border:1px solid var(--border);border-radius:8px;font-size:16px;background:var(--card);color:var(--text);font-family:inherit}
ul.items{list-style:none;margin:8px 0 0;padding:0;max-height:50vh;overflow:auto}
ul.items li{display:flex;align-items:center;gap:8px;padding:8px 0;border-bottom:1px solid var(--border)}
ul.items li:last-child{border-bottom:0}
ul.items label{display:flex;align-items:center;gap:8px;margin:0;font-weight:normal;flex:1;min-width:0;cursor:pointer}
ul.items input{width:auto;flex:none}
ul.items .name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px;direction:ltr;text-align:right;flex:1;min-width:0}
ul.items .size,ul.items .tag{color:var(--muted);font-size:12px;white-space:nowrap}
ul.items .tag{background:var(--bg);border-radius:6px;padding:2px 6px}
ul.items li.off .name{color:var(--muted)}
dialog#picker{width:min(560px,100vw - 24px);max-height:min(640px,100dvh - 24px);border:0;border-radius:12px;padding:16px;background:var(--card);color:var(--text);display:none;flex-direction:column;box-shadow:0 8px 32px rgba(0,0,0,.3)}
dialog#picker[open]{display:flex}
dialog::backdrop{background:rgba(0,0,0,.45)}
.tabs{display:flex;gap:6px;overflow-x:auto;padding:4px 0 8px;flex:none}
.tabs button{width:auto;margin:0;padding:6px 12px;font-size:14px;background:transparent;color:var(--text);border:1px solid var(--border);white-space:nowrap}
.tabs button.on{background:var(--primary);color:#fff;border-color:var(--primary)}
.crumbs{font-size:13px;color:var(--muted);padding:4px 0;flex:none;overflow-x:auto;white-space:nowrap}
.crumbs a{color:var(--primary);cursor:pointer;text-decoration:none}
ul.folders{list-style:none;margin:0;padding:0;overflow:auto;flex:1;min-height:120px;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
ul.folders li button{width:100%;margin:0;border-radius:0;background:transparent;color:var(--text);text-align:right;padding:12px 6px;border-bottom:1px solid var(--border);font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
ul.folders li.msg{padding:16px 6px;color:var(--muted);font-size:14px}
.seg{display:flex;border:1px solid var(--primary);border-radius:10px;overflow:hidden;margin:12px 0 4px}
.seg label{flex:1;margin:0;text-align:center;padding:10px;cursor:pointer;font-size:15px;color:var(--primary)}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg label:has(input:checked){background:var(--primary);color:#fff}
.seg label:has(input:focus-visible){outline:2px solid var(--primary);outline-offset:-4px}
body:not(.src-device) .only-device{display:none}
body.src-device .only-drive{display:none}
#devSummary{color:var(--text)}