:root {
  --bg: #0f1722;
  --bg-2: #16202e;
  --panel: #1b2738;
  --border: #233247;
  --text: #e6ebf2;
  --muted: #8a98ad;
  --accent: #4f8cff;
  --accent-hover: #6ba0ff;
  --ok: #27c479;
  --warn: #f5b945;
  --crit: #ff5d5d;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.45;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

.layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  background: var(--bg-2);
  border-right: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  flex-direction: column;
}
.brand { padding: 0 20px 20px; border-bottom: 1px solid var(--border); margin-bottom: 16px; }
.brand-mark { display: block; font-weight: 700; font-size: 22px; letter-spacing: 1px; }
.brand-sub { display: block; color: var(--muted); font-size: 12px; }
.nav-group-title {
  padding: 10px 20px 6px;
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--muted);
  text-transform: uppercase;
}
.nav-link {
  display: block;
  padding: 9px 20px;
  color: var(--text);
  border-left: 3px solid transparent;
}
.nav-link:hover { background: rgba(255,255,255,0.04); }
.nav-link.active {
  background: rgba(79,140,255,0.12);
  border-left-color: var(--accent);
  color: #fff;
}
.sidebar-footer {
  margin-top: auto;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  font-size: 12px;
}
.user-meta { margin-bottom: 10px; color: var(--muted); }
.role-tag {
  display: inline-block;
  margin-top: 4px;
  background: var(--panel);
  color: var(--text);
  padding: 1px 8px;
  border-radius: 10px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.logout {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
}
.logout:hover { background: var(--panel); }

/* Main */
.main { display: flex; flex-direction: column; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 28px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
}
.topbar h1 { margin: 0; font-size: 18px; font-weight: 600; }
.content { padding: 24px 28px; }

/* Tabs */
.tabs { display: flex; gap: 4px; margin-bottom: 18px; border-bottom: 1px solid var(--border); }
.tab {
  padding: 8px 14px;
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--muted);
  text-transform: uppercase;
  border-bottom: 2px solid transparent;
}
.tab.tab-active { color: var(--text); border-bottom-color: var(--accent); }
.tab.tab-disabled { opacity: 0.45; }

/* Cards */
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 18px 20px;
  margin-bottom: 18px;
}
.card h2 {
  margin: 0 0 12px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
}
.detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.detail-grid .card { margin-bottom: 0; }
@media (max-width: 1024px) { .detail-grid { grid-template-columns: 1fr; } }

dl { margin: 0; display: grid; grid-template-columns: 130px 1fr; gap: 6px 12px; }
dt { color: var(--muted); }
dd { margin: 0; }

/* Tables */
table.grid {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
table.grid th, table.grid td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
table.grid thead th {
  background: var(--bg-2);
  color: var(--muted);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
table.grid tbody tr:last-child td { border-bottom: none; }
table.grid tbody tr:hover { background: rgba(255,255,255,0.02); }
.row-stale td { color: var(--warn); }

/* Badges & status */
.badge-counter {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 12px;
  color: var(--muted);
}
.badge-counter strong { color: var(--text); margin: 0 4px; }
.badge-alert {
  background: rgba(255,93,93,0.15);
  color: var(--crit);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  margin-left: 6px;
}
.badge-warn {
  background: rgba(245,185,69,0.15);
  color: var(--warn);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  margin-left: 6px;
}
.dot-ok { color: var(--ok); }
.status { padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; }
.status-ok { background: rgba(39,196,121,0.15); color: var(--ok); }
.status-warning { background: rgba(245,185,69,0.15); color: var(--warn); }
.status-failed { background: rgba(255,93,93,0.15); color: var(--crit); }

.sev { padding: 1px 7px; border-radius: 8px; font-size: 10px; text-transform: uppercase; letter-spacing: 0.5px; margin-right: 6px; }
.sev-info { background: rgba(79,140,255,0.18); color: var(--accent); }
.sev-warning { background: rgba(245,185,69,0.18); color: var(--warn); }
.sev-critical { background: rgba(255,93,93,0.18); color: var(--crit); }

.alert-list { margin: 0; padding: 0; list-style: none; }
.alert-list li { padding: 8px 0; border-bottom: 1px solid var(--border); }
.alert-list li:last-child { border-bottom: none; }
.muted { color: var(--muted); margin-left: 8px; font-size: 12px; }
.empty { padding: 24px; color: var(--muted); text-align: center; border: 1px dashed var(--border); border-radius: 6px; }

.link-detail { font-size: 12px; }
.link-back { color: var(--muted); }

/* Buttons / forms */
.btn-primary {
  background: var(--accent);
  color: #fff;
  border: 0;
  padding: 8px 18px;
  border-radius: 4px;
  font-weight: 600;
  cursor: pointer;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary {
  display: inline-block;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 5px 12px;
  border-radius: 4px;
  font-size: 12px;
}
.btn-secondary:hover { background: var(--bg-2); }
.form-inline { display: flex; gap: 14px; align-items: end; }
.form-inline label { display: flex; flex-direction: column; font-size: 12px; color: var(--muted); }
.form-inline input, .form-inline select {
  margin-top: 4px;
  background: var(--bg-2);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 7px 10px;
  border-radius: 4px;
  min-width: 160px;
}

/* Login */
.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0f1722 0%, #1b2738 100%);
}
.login-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 32px;
  width: 360px;
}
.login-brand { margin-bottom: 18px; }
.login-card h1 { margin: 0 0 18px; font-size: 18px; }
.login-card form { display: flex; flex-direction: column; gap: 12px; }
.login-card label { display: flex; flex-direction: column; font-size: 12px; color: var(--muted); }
.login-card input {
  margin-top: 4px;
  padding: 9px 11px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--text);
}
.login-card .btn-primary { margin-top: 8px; }
.alert-error {
  background: rgba(255,93,93,0.15);
  color: var(--crit);
  padding: 8px 12px;
  border-radius: 4px;
  margin-bottom: 12px;
  font-size: 13px;
}