:root{
  --bg:#f5f6f8; --card:#fff; --text:#1d2330; --muted:#6b7385; --line:#e4e7ec;
  --accent:#2563eb; --accent-ink:#fff; --hover:#f0f4ff; --alert:#fff4e5; --alert-ink:#8a4b00;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#12151b; --card:#1a1e26; --text:#e6e9ef; --muted:#9aa3b5; --line:#2a303b;
         --accent:#4f8bff; --hover:#222a38; --alert:#3a2a12; --alert-ink:#ffcf8a; }
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:14px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:inherit;text-decoration:none}
.top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 24px;background:var(--card);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;font-size:16px}
.logo-img{display:block;width:auto;max-width:180px;object-fit:contain}
.login-logo{display:flex;justify-content:center;margin-bottom:4px}
.login-logo .logo{font-size:40px}
.card h2{text-align:center}
.badge{font-size:12px;color:var(--muted);background:var(--bg);border:1px solid var(--line);padding:4px 10px;border-radius:999px}
.link{color:var(--accent)}
/* Dark header (shared-link pages) */
.top.dark{background:#111827;border-bottom-color:#111827;color:#f3f4f6}
.top.dark .brand{color:#fff}
.top.dark .badge{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.18);color:#d1d5db}
.wrap{max-width:1100px;margin:0 auto;padding:20px 16px 40px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin-bottom:14px;font-size:15px}
.crumbs a{color:var(--accent)} .crumbs a:hover{text-decoration:underline}
.crumbs .sep{color:var(--muted)} .crumbs .cur{font-weight:600}
.alert{background:var(--alert);color:var(--alert-ink);padding:10px 14px;border-radius:8px;margin-bottom:12px}
.alert.big{margin-top:60px;text-align:center;font-size:16px}
.toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:10px}
.toolbar .meta{color:var(--muted);margin-right:auto}
.toolbar input[type=search]{padding:7px 10px;border:1px solid var(--line);border-radius:7px;background:var(--card);color:var(--text);min-width:180px}
.btn{display:inline-flex;align-items:center;gap:4px;padding:7px 12px;border:1px solid var(--line);border-radius:7px;background:var(--card);color:var(--text);cursor:pointer;font:inherit;white-space:nowrap}
.btn:hover{background:var(--hover)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.08)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.sm{padding:4px 9px;font-size:13px}
.table{background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.row{display:grid;grid-template-columns:36px 1fr 110px 150px 190px;align-items:center;gap:8px;padding:8px 12px;border-top:1px solid var(--line)}
.row.head{border-top:0;font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);background:var(--bg)}
.row.item:hover,.row.up:hover{background:var(--hover)}
.c-name a{display:flex;align-items:center;gap:8px;min-width:0}
.c-name span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.c-name a:hover span{color:var(--accent);text-decoration:underline}
.c-size,.c-date{color:var(--muted);font-size:13px}
.c-act{display:flex;gap:6px;justify-content:flex-end}
.c-chk{display:flex;justify-content:center}
.empty{padding:30px;text-align:center;color:var(--muted)}
dialog{border:1px solid var(--line);border-radius:12px;padding:0;background:var(--card);color:var(--text);width:min(480px,92vw)}
dialog::backdrop{background:rgba(0,0,0,.4)}
.dlg{padding:20px;display:flex;flex-direction:column;gap:12px}
.dlg h3{margin:0;font-size:16px;word-break:break-all}
.dlg label{display:flex;justify-content:space-between;align-items:center;gap:10px}
.dlg select{padding:6px 8px;border-radius:6px;border:1px solid var(--line);background:var(--card);color:var(--text)}
.linkbox{display:flex;gap:6px}
.linkbox input{flex:1;padding:7px 9px;border:1px solid var(--line);border-radius:7px;background:var(--bg);color:var(--text);font-size:13px}
.hint{color:var(--muted);font-size:12px;margin-top:6px}
.dlg-foot{display:flex;justify-content:flex-end}
.login{display:flex;justify-content:center;padding-top:80px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:24px;display:flex;flex-direction:column;gap:12px;width:min(340px,92vw)}
.card h2{margin:0 0 4px;font-size:18px}
.card input{padding:9px 10px;border:1px solid var(--line);border-radius:7px;background:var(--bg);color:var(--text)}
@media (max-width:720px){
  .row{grid-template-columns:30px 1fr auto;padding:10px}
  .row .c-size,.row .c-date{display:none}
  .btn.sm .lbl{display:none}
  .top{padding:12px 16px}
}