:root{
  --bg:#0f172a; --panel:#ffffff; --ink:#0f172a; --muted:#64748b;
  --line:#e2e8f0; --brand:#4f46e5; --brand2:#6366f1; --ok:#16a34a; --warn:#dc2626;
}
*{box-sizing:border-box}
body{margin:0;font-family:'Segoe UI',system-ui,-apple-system,Roboto,Arial,sans-serif;
  background:#f1f5f9;color:var(--ink);font-size:15px;line-height:1.5}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}

/* top bar */
.topbar{display:flex;align-items:center;gap:24px;background:var(--bg);color:#e2e8f0;
  padding:0 24px;height:56px;position:sticky;top:0;z-index:10}
.brand{font-size:18px;color:#fff;white-space:nowrap}
.brand b{font-weight:700}
.brand .logo{color:var(--brand2);font-size:20px}
.topbar nav{display:flex;gap:18px;flex:1}
.topbar nav a{color:#cbd5e1;font-size:14px}
.topbar nav a:hover{color:#fff;text-decoration:none}
.userbox{display:flex;align-items:center;gap:14px}
.userbox a{color:#e2e8f0;font-size:14px}
.btn-ghost{border:1px solid #334155;padding:5px 12px;border-radius:6px}

.container{max-width:1000px;margin:28px auto;padding:0 20px}
.page-head{margin-bottom:18px}
.page-head h1{margin:0 0 4px;font-size:24px}
.muted{color:var(--muted)}
.small{font-size:13px}

.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;
  padding:20px;margin-bottom:18px;box-shadow:0 1px 2px rgba(15,23,42,.04)}
.card h3{margin:0 0 12px;font-size:16px}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:18px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media(max-width:760px){.grid{grid-template-columns:1fr 1fr}.grid2{grid-template-columns:1fr}}
.stat{text-align:center}
.stat-n{font-size:30px;font-weight:700;color:var(--brand)}
.stat-l{color:var(--muted);font-size:13px}

table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line);font-size:14px}
th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.03em}
table.kv th{width:180px}

input,textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;
  font-size:14px;font-family:inherit;margin:6px 0 4px}
label{font-size:13px;color:var(--muted);font-weight:600}
button,.btn{background:var(--brand);color:#fff;border:0;padding:10px 16px;border-radius:8px;
  font-size:14px;cursor:pointer;font-weight:600;display:inline-block}
button:hover,.btn:hover{background:#4338ca;text-decoration:none}
.searchbar{display:flex;gap:10px;align-items:flex-start}
.searchbar input{margin:0}
.actions{display:flex;gap:10px;flex-wrap:wrap}

.alert{background:#fef2f2;border:1px solid #fecaca;color:#991b1b;padding:10px 14px;
  border-radius:8px;margin:10px 0;font-size:14px}
.alert.ok{background:#f0fdf4;border-color:#bbf7d0;color:#166534}

.term{background:#0b1220;color:#7ee787;padding:14px;border-radius:8px;overflow:auto;
  font-family:'Cascadia Code',Consolas,monospace;font-size:13px;white-space:pre-wrap}
.avatar{width:72px;height:72px;border-radius:50%;object-fit:cover;background:#e2e8f0;margin-bottom:10px}
.bio-preview{background:#f8fafc;border:1px solid var(--line);border-radius:8px;padding:10px;margin-top:6px}
.filelist{margin:0;padding-left:18px}
.msg .msg-head{margin-bottom:6px}
.person-name{font-size:16px;font-weight:600;margin-bottom:2px}

.foot{text-align:center;color:var(--muted);font-size:12px;padding:24px}

/* login */
.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;
  background:linear-gradient(135deg,#1e1b4b,#0f172a)}
.login-card{background:#fff;padding:36px;border-radius:16px;width:360px;
  box-shadow:0 20px 50px rgba(0,0,0,.3)}
.login-card .brand{color:var(--ink);margin-bottom:6px}
.login-card .brand.big{font-size:22px}
.login-card button{width:100%;margin-top:14px}