:root{
  --bg:#f5f7fb;--card:#fff;--ink:#172033;--muted:#6b7280;--line:#e5e9f1;
  --brand:#2f5fd0;--brand-dark:#1d3f8f;--brand-soft:#eef4ff;--red:#c0392b;--red-soft:#fdeceb;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Segoe UI","Nirmala UI","Mangal","Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.5;font-size:16px}
a{color:inherit;text-decoration:none}
.wrap{max-width:820px;margin:0 auto;padding:0 18px}
header{background:#fff;border-bottom:1px solid var(--line)}
.top{display:flex;align-items:center;gap:12px;min-height:62px}
.brand{font-size:1.05rem;font-weight:800}
.brand span{color:var(--brand)}
.back{margin-left:auto;font-size:.78rem;font-weight:700;color:var(--muted)}
.back:hover{color:var(--brand)}
main{padding:28px 0 60px}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 22px;box-shadow:0 1px 4px rgba(30,50,90,.05)}
h1{font-size:1.35rem;color:var(--brand-dark);margin-bottom:4px}
.sub{font-size:.82rem;color:var(--muted);margin-bottom:18px}
.gate{max-width:430px}
.gate label{display:block;font-size:.74rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:5px}
.gate input{width:100%;border:1px solid var(--line);border-radius:9px;padding:10px 12px;font:inherit;font-size:.92rem;outline:none;background:#fbfcfe}
.gate input:focus{border-color:#93b5ee;box-shadow:0 0 0 3px #dbe7ff}
.gate button{margin-top:10px;width:100%;border:0;border-radius:9px;padding:10px 12px;background:linear-gradient(135deg,var(--brand-dark),var(--brand));color:#fff;font-weight:800;font-size:.85rem;cursor:pointer}
.gate button:disabled{opacity:.6;cursor:default}
.msg{font-size:.8rem;margin-top:10px;border-radius:8px;padding:8px 10px}
.msg.err{background:var(--red-soft);border:1px solid #f3b9b3;color:var(--red)}
.msg[hidden]{display:none!important}
.hint{font-size:.72rem;color:var(--muted);margin-top:10px}
.files{display:none}
.files.on{display:block}
.bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.bar h2{font-size:1rem;color:var(--brand-dark)}
.count{font-size:.72rem;font-weight:700;color:var(--brand);background:var(--brand-soft);border-radius:999px;padding:3px 9px}
.bar .actions{margin-left:auto;display:flex;gap:7px}
.btn{border:1px solid var(--line);background:#fff;border-radius:8px;padding:6px 10px;font-size:.76rem;font-weight:700;cursor:pointer;color:var(--ink)}
.btn:hover{border-color:#b9c8e8;background:#f8faff}
.list{list-style:none;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.list li + li{border-top:1px solid var(--line)}
.file{display:flex;align-items:center;gap:11px;padding:11px 13px;background:#fff}
.file:hover{background:#f8faff}
.ext{flex:0 0 38px;height:34px;border-radius:7px;background:var(--brand-soft);color:var(--brand-dark);font-size:.62rem;font-weight:900;display:grid;place-items:center;text-transform:uppercase;letter-spacing:.02em;overflow:hidden}
.file .name{flex:1;min-width:0;font-size:.86rem;font-weight:700;overflow-wrap:anywhere}
.file .size{font-size:.7rem;color:var(--muted);white-space:nowrap}
.file .open{color:var(--brand);font-weight:800;font-size:.78rem;white-space:nowrap}
.empty{color:var(--muted);font-size:.84rem;text-align:center;padding:26px 12px}
.owner{margin-top:16px;border:1px dashed var(--line);border-radius:10px;padding:10px 12px;background:#fbfcfe}
.owner summary{cursor:pointer;font-size:.76rem;font-weight:800;color:var(--brand-dark);text-transform:uppercase;letter-spacing:.05em}
.owner ol{margin:10px 0 6px;padding-left:20px;font-size:.8rem;color:var(--muted)}
.owner li{margin:4px 0}
.owner code{font-family:Consolas,"Courier New",monospace;font-size:.78rem;background:#eef2f9;border-radius:4px;padding:1px 5px}
.owner pre{font-family:Consolas,"Courier New",monospace;font-size:.78rem;background:#172033;color:#dbe6ff;border-radius:8px;padding:10px 12px;overflow-x:auto}
.owner .note{font-size:.76rem;color:var(--muted);margin-top:8px}
.owner .note code{background:#eef2f9;color:var(--ink)}
@media(max-width:600px){
  .card{padding:17px 15px}
  .top{min-height:56px}
  .brand{font-size:.92rem}
  .file{gap:8px;padding:10px}
  .file .size{display:none}
  .file .open{font-size:.72rem}
}