*{box-sizing:border-box}
:root{
    --bg:#f5f7fb;
    --panel:#ffffff;
    --text:#1f2937;
    --muted:#6b7280;
    --line:#e5e7eb;
    --primary:#2563eb;
    --primary-dark:#1d4ed8;
    --success:#15803d;
    --success-bg:#dcfce7;
    --warning:#a16207;
    --warning-bg:#fef3c7;
    --danger:#b91c1c;
    --danger-bg:#fee2e2;
    --sidebar:#111827;
}
html,body{margin:0;padding:0;min-height:100%;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text)}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
input,select,textarea{
    width:100%;border:1px solid #d1d5db;border-radius:10px;background:#fff;padding:11px 12px;color:var(--text);
    outline:none;transition:.15s border-color,.15s box-shadow
}
input:focus,select:focus,textarea:focus{border-color:#93c5fd;box-shadow:0 0 0 3px rgba(37,99,235,.12)}
label{display:block;font-size:13px;font-weight:700;margin:14px 0 6px}
h1,h2,p{margin-top:0}
h1{font-size:24px;margin-bottom:3px}
h2{font-size:18px;margin-bottom:4px}
.muted{color:var(--muted);font-size:13px}
.app-shell{display:flex;min-height:100vh}
.sidebar{
    width:250px;background:var(--sidebar);color:#fff;padding:20px 14px;display:flex;flex-direction:column;
    position:fixed;inset:0 auto 0 0;z-index:30
}
.sidebar-brand{display:flex;align-items:center;gap:10px;padding:4px 8px 24px}
.sidebar-brand strong{display:block;font-size:15px}
.sidebar-brand span{display:block;color:#9ca3af;font-size:12px}
.brand-mark{
    width:54px;height:54px;border-radius:16px;background:var(--primary);display:flex;align-items:center;justify-content:center;
    color:#fff;font-weight:800;letter-spacing:.5px;margin:0 auto 14px
}
.brand-mark.small{width:38px;height:38px;border-radius:11px;margin:0}
.nav{display:flex;flex-direction:column;gap:4px}
.nav a,.logout-link{padding:11px 12px;border-radius:9px;color:#d1d5db;font-size:14px}
.nav a:hover,.nav a.active{background:#1f2937;color:#fff}
.logout-link{margin-top:auto;color:#fca5a5}
.content-wrap{margin-left:250px;width:calc(100% - 250px)}
.topbar{
    min-height:78px;background:#fff;border-bottom:1px solid var(--line);padding:16px 26px;display:flex;align-items:center;gap:12px;
    position:sticky;top:0;z-index:20
}
.menu-toggle{display:none;border:0;background:#eef2ff;border-radius:9px;padding:9px 11px;cursor:pointer}
.content{padding:26px;max-width:1500px;margin:0 auto}
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:22px}
.stat-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:0 1px 2px rgba(0,0,0,.03)}
.stat-card span{display:block;color:var(--muted);font-size:13px;margin-bottom:10px}
.stat-card strong{font-size:30px}
.stat-card.danger{border-color:#fecaca}
.panel{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;margin-bottom:22px;box-shadow:0 1px 2px rgba(0,0,0,.03)}
.panel-header{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:18px}
.table-responsive{overflow:auto;border:1px solid var(--line);border-radius:10px}
table{width:100%;border-collapse:collapse;min-width:760px}
th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);font-size:13px;vertical-align:middle}
th{background:#f9fafb;color:#4b5563;font-size:12px;text-transform:uppercase;letter-spacing:.02em}
tr:last-child td{border-bottom:0}
.badge{display:inline-flex;align-items:center;padding:5px 8px;border-radius:999px;font-size:12px;font-weight:700}
.badge.success{background:var(--success-bg);color:var(--success)}
.badge.warning{background:var(--warning-bg);color:var(--warning)}
.badge.danger{background:var(--danger-bg);color:var(--danger)}
.muted-badge{background:#f3f4f6;color:#6b7280}
.btn{
    border:0;border-radius:10px;padding:10px 14px;font-weight:700;cursor:pointer;display:inline-flex;justify-content:center;align-items:center;
    transition:.15s background,.15s transform
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-secondary{background:#eef2ff;color:#1e40af}
.btn-block{width:100%;margin-top:18px}
.login-page{display:flex;align-items:center;justify-content:center;padding:20px;background:linear-gradient(180deg,#f8fafc,#eef2ff)}
.login-card{width:min(100%,420px);background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px;box-shadow:0 20px 55px rgba(15,23,42,.10)}
.login-card h1{text-align:center}
.login-card .muted{text-align:center}
.alert{padding:12px 14px;border-radius:10px;margin-bottom:16px;font-size:13px}
.alert-danger{background:var(--danger-bg);color:var(--danger)}
.alert-success{background:var(--success-bg);color:var(--success)}
.alert-info{background:#eff6ff;color:#1d4ed8;margin-top:18px}
.rule-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.rule-card{border:1px solid var(--line);border-radius:12px;padding:18px;background:#fff}
.rule-card.new-card{border-style:dashed;background:#fbfdff}
.rule-card-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.switch-row{display:flex;align-items:center;gap:9px;margin:16px 0}
.switch-row input{width:auto}
.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-bottom:18px}
.search-form{display:flex;gap:8px;min-width:340px}
.search-form input{min-width:220px}
.empty-state,.empty-cell{text-align:center;color:var(--muted);padding:26px}
.responsive-head{align-items:flex-end}

@media (max-width:1100px){
    .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    .rule-grid{grid-template-columns:1fr}
}
@media (max-width:900px){
    .sidebar{transform:translateX(-100%);transition:.2s transform;box-shadow:20px 0 50px rgba(0,0,0,.18)}
    .menu-open .sidebar{transform:translateX(0)}
    .content-wrap{margin-left:0;width:100%}
    .menu-toggle{display:inline-block}
    .content{padding:18px}
    .topbar{padding:14px 18px}
}
@media (max-width:640px){
    .stat-grid{grid-template-columns:1fr}
    .settings-grid,.form-row{grid-template-columns:1fr}
    .panel{padding:15px;border-radius:12px}
    .responsive-head{align-items:stretch;flex-direction:column}
    .search-form{min-width:0;width:100%;flex-direction:column}
    .search-form input{min-width:0}
    .login-card{padding:24px}
}