:root{
  --bg:#0e1117; --surface:#161b22; --surface-2:#1c2230; --border:#2a313c;
  --text:#e6edf3; --muted:#8b949e; --primary:#3b82f6; --primary-2:#2563eb;
  --green:#22c55e; --red:#ef4444; --amber:#f59e0b; --radius:10px;
  --shadow:0 8px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--text);
  font:15px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}

/* ---------- Auth ---------- */
.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:24px;
  background:radial-gradient(1200px 600px at 50% -10%,rgba(59,130,246,.12),transparent)}
.auth-card{width:100%;max-width:400px;background:var(--surface);border:1px solid var(--border);
  border-radius:16px;padding:32px;box-shadow:var(--shadow)}
.brand{display:flex;align-items:center;gap:12px;margin-bottom:24px}
.brand-mark{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--primary),#7c3aed);
  display:grid;place-items:center;font-weight:700;color:#fff;letter-spacing:.5px}
.brand-name{font-weight:700;font-size:18px}
.brand-sub{color:var(--muted);font-size:13px}
.auth-form{display:flex;flex-direction:column;gap:16px}
.auth-foot{margin-top:20px;text-align:center;color:var(--muted);font-size:12px}

/* ---------- Fields ---------- */
.field{display:flex;flex-direction:column;gap:6px}
.field>span{font-size:13px;color:var(--muted)}
input[type=text],input[type=email],input[type=password],input[type=number],select,textarea{
  width:100%;padding:10px 12px;background:var(--surface-2);border:1px solid var(--border);
  border-radius:var(--radius);color:var(--text);font-size:14px;outline:none;transition:border .15s}
input:focus,select:focus,textarea:focus{border-color:var(--primary)}
.check{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.check input{width:16px;height:16px}
.error{background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.35);color:#fca5a5;
  padding:8px 12px;border-radius:var(--radius);font-size:13px}
.hint{color:var(--muted);font-size:12px}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;
  padding:10px 16px;border-radius:var(--radius);border:1px solid var(--border);
  background:var(--surface-2);color:var(--text);font-size:14px;font-weight:600;transition:.15s}
.btn:hover{border-color:#3b4453}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-2)}
.btn-danger{background:transparent;border-color:rgba(239,68,68,.4);color:#fca5a5}
.btn-danger:hover{background:rgba(239,68,68,.12)}
.btn-sm{padding:6px 10px;font-size:13px}
.btn[disabled]{opacity:.6;cursor:not-allowed}

/* ---------- App shell ---------- */
.shell{display:grid;grid-template-columns:240px 1fr;min-height:100vh}
.sidebar{background:var(--surface);border-right:1px solid var(--border);padding:20px 14px;display:flex;flex-direction:column;gap:6px}
.sidebar .brand{margin-bottom:20px}
.nav-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--radius);color:var(--muted);font-weight:500}
.nav-item:hover{background:var(--surface-2);color:var(--text);text-decoration:none}
.nav-item.active{background:rgba(59,130,246,.15);color:#fff}
.sidebar-foot{margin-top:auto;padding-top:12px;border-top:1px solid var(--border);font-size:13px;color:var(--muted)}
.main{padding:28px 32px;overflow:auto}
.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}
.page-title{font-size:22px;font-weight:700;margin:0}
.page-sub{color:var(--muted);font-size:14px;margin-top:2px}

/* ---------- Cards / grid ---------- */
.grid{display:grid;gap:16px}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:18px}
.stat .label{color:var(--muted);font-size:13px}
.stat .value{font-size:28px;font-weight:700;margin-top:4px}

/* ---------- Table ---------- */
.table-wrap{background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden}
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:12px 16px;font-size:14px}
th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.4px;
  border-bottom:1px solid var(--border);background:var(--surface-2)}
td{border-bottom:1px solid var(--border)}
tr:last-child td{border-bottom:none}
tr:hover td{background:rgba(255,255,255,.02)}
.badge{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600}
.badge.ok{background:rgba(34,197,94,.15);color:#86efac}
.badge.off{background:rgba(239,68,68,.15);color:#fca5a5}
.badge.neutral{background:var(--surface-2);color:var(--muted)}

/* ---------- Alerts / flash ---------- */
.alert{padding:12px 16px;border-radius:var(--radius);margin-bottom:16px;font-size:14px}
.alert.success{background:rgba(34,197,94,.12);border:1px solid rgba(34,197,94,.35);color:#86efac}
.alert.error{background:rgba(239,68,68,.12);border:1px solid rgba(239,68,68,.35);color:#fca5a5}
.reveal{background:var(--surface-2);border:1px dashed var(--primary);border-radius:var(--radius);
  padding:12px 16px;margin-bottom:16px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}

/* ---------- Modal ---------- */
.modal-bg{position:fixed;inset:0;background:rgba(0,0,0,.6);display:grid;place-items:center;padding:24px;z-index:50}
.modal{width:100%;max-width:440px;background:var(--surface);border:1px solid var(--border);
  border-radius:16px;padding:24px;box-shadow:var(--shadow)}
.modal h3{margin:0 0 16px}
.row{display:flex;gap:12px;align-items:center}
.row.end{justify-content:flex-end}
.spacer{flex:1}
.mt{margin-top:16px}.mb{margin-bottom:16px}

@media (max-width:820px){
  .shell{grid-template-columns:1fr}
  .sidebar{display:none}
  .grid.cols-3,.grid.cols-4{grid-template-columns:1fr 1fr}
}