/* Minimal clean UI */
:root{--bg:#f6f7fb;--card:#fff;--text:#0f172a;--muted:#64748b;--pri:#1976d2;--line:#e2e8f0;}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;color:var(--text);background:var(--bg)}
.wrap{max-width:980px;margin:0 auto;padding:16px}
.topbar{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{font-weight:800}
.nav a{color:var(--muted);text-decoration:none;margin-left:10px;font-weight:700}
.nav a.active{color:var(--pri)}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px;box-shadow:0 2px 10px rgba(0,0,0,.04);margin:14px 0}
.grid{display:grid;gap:12px}
.grid-2{grid-template-columns:1fr 1fr}
@media (max-width:720px){.grid-2{grid-template-columns:1fr}}
label{display:block;font-weight:700;margin-bottom:6px}
input[type=text],input[type=password],textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:#fff}
textarea{min-height:160px;resize:vertical}
.btn{display:inline-block;border:none;background:var(--pri);color:#fff;padding:10px 14px;border-radius:12px;font-weight:800;cursor:pointer}
.btn.secondary{background:#475569}
.btn.danger{background:#d32f2f}
.table{width:100%;border-collapse:collapse}
.table th,.table td{padding:10px;border-bottom:1px solid var(--line);vertical-align:top}
.small{color:var(--muted);font-size:.92rem}
.notice{padding:10px 12px;border-radius:12px;margin:10px 0}
.notice.err{background:#fdecea;border:1px solid #f5c2c7;color:#b71c1c}
.notice.ok{background:#e8f5e9;border:1px solid #c8e6c9;color:#1b5e20}
.actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.badge{display:inline-block;background:#eef2ff;border:1px solid #c7d2fe;color:#3730a3;padding:2px 8px;border-radius:999px;font-weight:800;font-size:.8rem}