:root {
  --bg: #0f1720;
  --bg-elevated: #16212c;
  --border: #263241;
  --text: #e6edf3;
  --text-muted: #8b98a5;
  --accent: #3b9dff;
  --accent-soft: rgba(59, 157, 255, 0.15);
  --green: #3fb950;
  --red: #f85149;
  --orange: #d29922;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--text); }
.brand:hover { text-decoration: none; }
.topbar nav a {
  color: var(--text-muted);
  margin-left: 18px;
  font-size: 0.92rem;
}
.topbar nav a.active, .topbar nav a:hover { color: var(--text); }

.content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}
.card-narrow { max-width: 380px; margin: 40px auto; }
.card h1 { margin-top: 0; font-size: 1.3rem; }
.card h2 { margin: 0; font-size: 1.05rem; }

.dashboard-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  flex-wrap: wrap;
  gap: 10px;
}
.dashboard-toolbar label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

select, input[type=text], input[type=password], input[type=number], input[type=datetime-local] {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 0.95rem;
  color-scheme: dark;
}
select:focus, input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}
.stat-card { margin-bottom: 0; text-align: center; }
.stat-label { color: var(--text-muted); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 8px; }
.stat-value { font-size: 2rem; font-weight: 700; font-variant-numeric: tabular-nums; }

.gauge { margin-top: 12px; }
.gauge-track {
  height: 8px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--border);
  overflow: hidden;
}
.gauge-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: var(--green);
  transition: width 0.4s ease, background-color 0.4s ease;
}
.gauge-fill.level-warn { background: var(--orange); }
.gauge-fill.level-crit { background: var(--red); }
.gauge-caption { margin-top: 6px; font-size: 0.78rem; color: var(--text-muted); }

.status-badge {
  font-size: 0.8rem;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
}
.status-ok { color: var(--green); border-color: var(--green); }
.status-error { color: var(--red); border-color: var(--red); }
.status-unknown { color: var(--text-muted); }

.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 10px;
}
.range-buttons { display: flex; gap: 6px; }
.range-buttons button {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 0.82rem;
  cursor: pointer;
}
.range-buttons button.active { color: var(--text); background: var(--accent-soft); border-color: var(--accent); }

.custom-range {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  flex-wrap: wrap;
}
.custom-range .range-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.custom-range .range-field span {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}
.custom-range input[type=datetime-local] {
  min-width: 200px;
}
.custom-range .btn-row { margin-bottom: 1px; }
.custom-range .help-text { flex-basis: 100%; color: var(--red); }

.form { display: flex; flex-direction: column; gap: 14px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-size: 0.9rem; color: var(--text-muted); }
.form-row { display: flex; gap: 14px; flex-wrap: wrap; }
.form-row > label { flex: 1; min-width: 160px; }
.form-check { flex-direction: row !important; align-items: center; gap: 8px !important; }

.btn {
  border: none;
  border-radius: 6px;
  padding: 9px 16px;
  font-size: 0.92rem;
  cursor: pointer;
}
.btn-primary { background: var(--accent); color: #06131f; font-weight: 600; }
.btn-secondary { background: var(--bg); color: var(--text); border: 1px solid var(--border); }
.btn-danger { background: var(--red); color: #240807; font-weight: 600; }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; }

.alert { padding: 10px 14px; border-radius: 6px; font-size: 0.9rem; }
.alert-error { background: rgba(248, 81, 73, 0.12); color: var(--red); border: 1px solid rgba(248, 81, 73, 0.4); }
.alert-success { background: rgba(63, 185, 80, 0.12); color: var(--green); border: 1px solid rgba(63, 185, 80, 0.4); }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 0.92rem; }
th { color: var(--text-muted); font-weight: 600; font-size: 0.82rem; text-transform: uppercase; }
tr:last-child td { border-bottom: none; }

.badge-disabled { color: var(--orange); font-size: 0.8rem; }
.test-result { font-size: 0.85rem; margin-top: 6px; }
.help-text { color: var(--text-muted); font-size: 0.8rem; }