:root {
  --bg: #0f1419;
  --panel: #1a2332;
  --border: #2d3a4d;
  --text: #e7ecf3;
  --muted: #8b9bb4;
  --accent: #3d9cf0;
  --hot: #f0a030;
  --danger: #e85d5d;
  --ok: #3ecf8e;
  --row-alt: #151c27;
  --user-active: #243348;
  font-family: "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.4;
}

header {
  padding: 1.1rem 1.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #152033 0%, var(--bg) 100%);
}

.header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.header-left { min-width: 0; flex: 1; }

.header-session {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
  padding: 0.35rem 0.35rem 0.35rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(26, 35, 50, 0.85);
}

.session-user {
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 600;
  max-width: 16rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.session-user:empty::before {
  content: "Not signed in";
  color: var(--muted);
  font-weight: 500;
}

button.btn-logout {
  margin-top: 0;
  background: transparent;
  color: var(--danger);
  border: 1px solid #6a3030;
  border-radius: 8px;
  padding: 0.4rem 0.85rem;
  font-weight: 650;
  cursor: pointer;
}
button.btn-logout:hover {
  background: rgba(232, 93, 93, 0.15);
  filter: none;
}

.brand {
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: 0.02em;
}

.sub { color: var(--muted); font-size: 0.9rem; margin-top: 0.15rem; }

.status {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.status.ok { color: var(--ok); }
.status.err { color: var(--danger); }

.controls, .filters {
  display: flex;
  align-items: center;
  gap: 0.75rem 1rem;
  padding: 0.65rem 1.5rem;
  flex-wrap: wrap;
}

.filters {
  border-bottom: 1px solid var(--border);
  background: #121a26;
}

label {
  color: var(--muted);
  font-size: 0.82rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

label.chk {
  flex-direction: row;
  align-items: center;
  gap: 0.4rem;
  user-select: none;
}
label.chk.tight { margin-top: 1.1rem; }

input[type="text"], select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.35rem 0.55rem;
  min-width: 11rem;
  font-size: 0.88rem;
}
input[type="text"]:focus, select:focus {
  outline: 1px solid var(--accent);
  border-color: var(--accent);
}

button {
  background: var(--accent);
  color: #061018;
  border: none;
  border-radius: 6px;
  padding: 0.4rem 0.9rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 1.05rem;
}
button.secondary {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
}
button:hover { filter: brightness(1.08); }

.meta { color: var(--muted); font-size: 0.85rem; margin-top: 1.1rem; }

.trend-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  padding: 0 0 0.65rem;
  font-size: 0.88rem;
  color: var(--text);
}
.trend-summary strong { color: var(--accent); font-weight: 700; }
.trend-summary .hint-inline { color: var(--muted); font-size: 0.8rem; }

.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 1rem;
  padding: 1rem 1.5rem;
  align-items: start;
}

@media (max-width: 960px) {
  .layout { grid-template-columns: 1fr; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 1rem;
}

.panel h2 {
  margin: 0;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  background: #121a26;
}

.hint {
  color: var(--muted);
  font-weight: 400;
  font-size: 0.85rem;
}

.users-panel { position: sticky; top: 0.5rem; max-height: calc(100vh - 2rem); display: flex; flex-direction: column; }
.user-list {
  overflow-y: auto;
  max-height: 70vh;
  padding: 0.35rem 0;
}

.user-item {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  color: var(--text);
  border: none;
  border-radius: 0;
  margin: 0;
  padding: 0.55rem 0.85rem;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
}
.user-item:hover { background: var(--user-active); filter: none; }
.user-item.active { background: var(--user-active); box-shadow: inset 3px 0 0 var(--accent); }
.user-item .u-name { font-family: ui-monospace, Consolas, monospace; font-size: 0.82rem; word-break: break-all; }
.user-item .u-meta { color: var(--muted); font-size: 0.75rem; margin-top: 0.15rem; }

.table-wrap { overflow-x: auto; max-height: 28rem; overflow-y: auto; }

.chart-wrap {
  height: 280px;
  padding: 0.75rem 1rem 1rem;
  position: relative;
}

.hidden { display: none !important; }

.alert-banner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 0.65rem 1.5rem;
  background: #3a1c1c;
  border-bottom: 1px solid #e85d5d;
  color: #ffc9c9;
  font-size: 0.92rem;
}
.alert-banner button { margin-top: 0; }

.settings-panel {
  margin: 0 1.5rem 1rem;
  padding: 1rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.settings-panel h2 { margin: 0 0 0.75rem; font-size: 1rem; }
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.75rem 1rem;
}
.settings-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  margin-top: 1rem;
  flex-wrap: wrap;
}
.settings-actions button { margin-top: 0; }

.badge {
  display: inline-block;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge.ok { background: #143528; color: var(--ok); }
.badge.danger { background: #3a1c1c; color: var(--danger); }

tr.alert-open { background: #2a1717 !important; }
.ack-btn { margin-top: 0; padding: 0.25rem 0.55rem; font-size: 0.8rem; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

th, td {
  text-align: left;
  padding: 0.45rem 0.75rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: #121a26;
  position: sticky;
  top: 0;
  z-index: 1;
}

tbody tr:nth-child(even) { background: var(--row-alt); }
tbody tr:hover { background: #1e2a3c; }

td.num { font-variant-numeric: tabular-nums; font-weight: 600; }
td.num.hot { color: var(--hot); }
td.num.danger { color: var(--danger); }
td.clickable { cursor: pointer; color: var(--accent); }
td.clickable:hover { text-decoration: underline; }

.empty {
  color: var(--muted);
  padding: 1rem;
  font-style: italic;
}

footer {
  padding: 0.5rem 1.5rem 1.5rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.mono { font-family: ui-monospace, Consolas, monospace; }