:root {
  --bg: #0d1117;
  --bg-panel: #161b22;
  --bg-panel-hover: #1c2229;
  --border: #30363d;
  --fg: #e6edf3;
  --fg-muted: #8b949e;
  --fg-dim: #6e7681;
  --accent: #58a6ff;
  --green: #3fb950;
  --yellow: #d29922;
  --red: #f85149;
  --purple: #a371f7;
  --mono: "SF Mono", "Cascadia Code", Consolas, "Liberation Mono", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }

.app {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  padding: 1.25rem 0.75rem;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar .logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0 0.5rem 1.25rem;
  font-weight: 600;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.75rem;
}

.sidebar .logo img { width: 22px; height: 22px; }

.sidebar nav a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.6rem;
  border-radius: 6px;
  color: var(--fg-muted);
  font-size: 0.87rem;
  margin-bottom: 2px;
}

.sidebar nav a:hover { background: var(--bg-panel-hover); color: var(--fg); }
.sidebar nav a.active { background: rgba(88,166,255,0.12); color: var(--accent); }
.sidebar nav a img { width: 16px; height: 16px; opacity: 0.85; }

.sidebar .status-block {
  margin-top: 1.25rem;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.78rem;
  color: var(--fg-muted);
}

.pulse-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  margin-right: 5px;
  animation: pulse 1.8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(63,185,80,0.5); }
  50% { opacity: 0.6; }
}

/* --- Main --- */
.main { padding: 1.5rem 1.75rem 3rem; max-width: 1400px; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.topbar h1 { font-size: 1.25rem; font-weight: 600; }
.topbar .subtitle { color: var(--fg-muted); font-size: 0.82rem; margin-top: 2px; }

.topbar .meta {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--fg-dim);
  text-align: right;
}

/* --- Grid / cards --- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 0.9rem;
  margin-bottom: 1.5rem;
}

.card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.1rem;
}

.stat-card .label {
  font-size: 0.75rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.4rem;
}

.stat-card .value {
  font-size: 1.6rem;
  font-weight: 600;
  font-family: var(--mono);
}

.stat-card .delta { font-size: 0.78rem; margin-top: 0.3rem; }
.delta.up { color: var(--green); }
.delta.down { color: var(--red); }
.delta.flat { color: var(--fg-dim); }

.chart-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.chart-card h3, .panel h3 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--fg-muted);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.chart-card canvas { max-height: 260px; }

.two-col {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 1rem;
}

/* --- Table --- */
table { width: 100%; border-collapse: collapse; font-size: 0.83rem; }
th {
  text-align: left;
  color: var(--fg-muted);
  font-weight: 500;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--border);
}
td {
  padding: 0.55rem 0.6rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.8rem;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg-panel-hover); }

.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-family: var(--sans);
  font-weight: 600;
}
.badge.ok { background: rgba(63,185,80,0.15); color: var(--green); }
.badge.warn { background: rgba(210,153,34,0.15); color: var(--yellow); }
.badge.crit { background: rgba(248,81,73,0.15); color: var(--red); }
.badge.idle { background: rgba(139,148,158,0.15); color: var(--fg-muted); }

.bar-track {
  width: 70px;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
  display: inline-block;
  vertical-align: middle;
  margin-right: 6px;
}
.bar-fill { height: 100%; background: var(--accent); }

/* --- Log console --- */
.log-console {
  background: #010409;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 0.9rem;
  font-family: var(--mono);
  font-size: 0.76rem;
  max-height: 320px;
  overflow-y: auto;
}
.log-line { padding: 2px 0; white-space: pre-wrap; word-break: break-all; }
.log-line .ts { color: var(--fg-dim); }
.log-line .lvl-info { color: var(--accent); }
.log-line .lvl-warn { color: var(--yellow); }
.log-line .lvl-error { color: var(--red); }
.log-line .lvl-debug { color: var(--fg-dim); }

/* --- Forms (settings) --- */
.form-row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1rem;
  align-items: center;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--border);
}
.form-row:last-child { border-bottom: none; }
.form-row label { color: var(--fg-muted); font-size: 0.83rem; }
.form-row input[type="text"],
.form-row input[type="number"],
.form-row select {
  background: #010409;
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 0.45rem 0.6rem;
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.82rem;
  width: 100%;
  max-width: 340px;
}
.toggle {
  position: relative;
  width: 38px;
  height: 20px;
  background: var(--border);
  border-radius: 999px;
  display: inline-block;
  cursor: pointer;
}
.toggle.on { background: var(--accent); }
.toggle::after {
  content: "";
  position: absolute;
  top: 2px; left: 2px;
  width: 16px; height: 16px;
  background: #fff;
  border-radius: 50%;
  transition: left 0.15s ease;
}
.toggle.on::after { left: 20px; }

.btn {
  background: var(--accent);
  color: #001426;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}
.btn.secondary {
  background: transparent;
  color: var(--fg-muted);
  border: 1px solid var(--border);
}

.footer-note {
  color: var(--fg-dim);
  font-size: 0.75rem;
  margin-top: 2rem;
  font-family: var(--mono);
}

@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: relative; height: auto; }
  .chart-grid, .two-col { grid-template-columns: 1fr; }
}