:root{
  --bg:#0c0d10; --panel:#16171c; --line:#2b2d34; --text:#f3f1ea; --muted:#c4c0b4;
  --accent:#e2b13c; --ink:#111111; --danger:#c45c5c;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
a{color:var(--accent);text-decoration:none}
.app{display:flex;min-height:100%}
.side{width:240px;background:#101117;border-right:1px solid var(--line);padding:18px 14px;display:flex;flex-direction:column;gap:12px}
.side-brand{display:flex;gap:10px;align-items:center}
.brand-mark{width:52px;height:52px;border-radius:12px;background:var(--accent);color:var(--ink);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:22px}
.brand-mark.sm{width:40px;height:40px;font-size:16px}
.tiny{color:var(--muted);font-size:12px}
.muted{color:var(--muted)}
.side-foot{margin-top:auto;display:flex;gap:14px;align-items:center}
.main{flex:1;display:flex;flex-direction:column;min-width:0}
.main.pad{padding:28px 32px}
.main-head{display:flex;justify-content:space-between;align-items:center;padding:18px 24px;border-bottom:1px solid var(--line)}
.main-head h1,h1,h2{margin:0;font-size:22px}
h2{font-size:18px;margin:28px 0 12px}
.btn-primary,.btn-ghost,.btn-danger,button[type=submit]{
  border:0;border-radius:999px;padding:10px 16px;font-weight:800;cursor:pointer
}
.btn-primary,button[type=submit]{background:var(--accent);color:var(--ink)}
.btn-ghost{background:#1c1e26;color:var(--text);border:1px solid var(--line);text-align:center;display:inline-block}
.btn-danger{background:#3a1f1f;color:#ffd0d0;border:1px solid #5a3030}
.conv-list{display:flex;flex-direction:column;gap:6px;overflow:auto}
.conv-item{padding:8px 10px;border-radius:8px;color:var(--muted);cursor:pointer}
.conv-item:hover,.conv-item.on{background:#1c1e26;color:var(--text)}
.auth-body{display:flex;align-items:center;justify-content:center}
.auth-card{width:min(420px,92vw);background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:32px;display:flex;flex-direction:column;gap:10px}
.auth-card h1{margin:8px 0 0}
.auth-card input,.upload-box input,.upload-box select,.filter input,.filter select{
  background:#121318;color:var(--text);border:1px solid var(--line);border-radius:10px;padding:10px
}
.alert{background:#3a2a12;color:#f3d9a4;padding:8px 10px;border-radius:8px;margin-bottom:12px}
.upload-box{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px;display:flex;flex-direction:column;gap:8px;max-width:640px;margin:0 0 28px}
.doc-card{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:10px}
.empty{color:var(--muted);padding:24px;border:1px dashed var(--line);border-radius:12px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin-bottom:12px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:16px}
.stat strong{font-size:28px;display:block;margin:6px 0}
.tbl{width:100%;border-collapse:collapse;background:var(--panel);border-radius:12px;overflow:hidden}
.tbl th,.tbl td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl th{color:var(--muted);font-weight:600;font-size:13px}
.pill{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px;background:#1c1e26}
.pill.on{background:#1d3a24;color:#b8f0c4}
.pill.off{background:#2a2c33;color:var(--muted)}
.filter{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
@media(max-width:800px){.side{display:none}.main.pad{padding:16px}}