:root {
  --bg: #0b0f17;
  --bg-elev: #131a26;
  --bg-card: #18222f;
  --border: #243245;
  --text: #e6edf6;
  --text-dim: #8aa0bb;
  --text-faint: #5b6f8b;
  --brand: #3b82f6;
  --brand-hover: #60a5fa;
  --accent: #22d3ee;
  --good: #34d399;
  --warn: #fbbf24;
  --bad: #f87171;
  --bar-1: #60a5fa;
  --bar-2: #a78bfa;
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
  --radius: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft Yahei",
    "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

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

button {
  font: inherit;
  cursor: pointer;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  padding: 8px 14px;
  transition: all 0.15s ease;
}
button:hover { background: #1d2738; }
button.primary {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  font-weight: 600;
}
button.primary:hover { background: var(--brand-hover); border-color: var(--brand-hover); }
button.ghost { background: transparent; }
button:disabled { opacity: 0.5; cursor: not-allowed; }

input, select {
  font: inherit;
  background: var(--bg-elev);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 10px;
  outline: none;
  transition: border 0.15s;
}
input:focus, select:focus { border-color: var(--brand); }
input[type="date"] { color-scheme: dark; }

/* --- Mock banner --- */
.mock-banner {
  background: linear-gradient(90deg, rgba(251, 191, 36, 0.18), rgba(251, 191, 36, 0.05));
  border-bottom: 1px solid rgba(251, 191, 36, 0.4);
  color: #fde68a;
  font-size: 13px;
  padding: 10px 28px;
  text-align: center;
}
.mock-banner code {
  background: rgba(0, 0, 0, 0.3);
  color: #fde68a;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
}
.mock-banner strong { color: #fbbf24; }

/* --- Top bar --- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.08), transparent);
}
.brand { display: flex; align-items: center; gap: 14px; }
.logo {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  color: #fff;
  font-weight: 800;
  font-size: 22px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.35);
}
.brand h1 { margin: 0; font-size: 18px; font-weight: 600; }
.sub { margin: 2px 0 0; font-size: 12px; color: var(--text-dim); }
.status {
  font-size: 12px;
  color: var(--text-dim);
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-elev);
}
.status.busy { color: var(--warn); border-color: rgba(251, 191, 36, 0.35); }
.status.error { color: var(--bad); border-color: rgba(248, 113, 113, 0.35); }
.status.ok { color: var(--good); border-color: rgba(52, 211, 153, 0.35); }

/* --- Filters --- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  padding: 18px 28px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elev);
  align-items: flex-end;
}
.field { display: flex; flex-direction: column; gap: 6px; min-width: 200px; }
.field label {
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.row .sep { color: var(--text-faint); font-size: 12px; }
.hint { color: var(--text-faint); font-size: 12px; }
.actions { display: flex; gap: 8px; margin-left: auto; }

/* --- Trend area (2 wide charts) --- */
.trend {
  grid-column: 1 / -1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.trend header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.trend h2 { margin: 0; font-size: 15px; font-weight: 600; }
.trend .meta { font-size: 12px; color: var(--text-dim); }
.trend-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
@media (max-width: 800px) {
  .trend-row { grid-template-columns: 1fr; }
}
.trend-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.trend-card h3 {
  margin: 0;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.chart-wrap.tall { height: 180px; }

/* --- Cards grid --- */
.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  padding: 20px 28px;
}
@media (max-width: 1000px) {
  .grid { grid-template-columns: 1fr; }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 360px;
}
.card header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.card h2 { margin: 0; font-size: 15px; font-weight: 600; }
.card h2 .dim { color: var(--text-faint); font-weight: 400; }
.meta { font-size: 12px; color: var(--text-dim); }
.chart-wrap {
  height: 220px;
  position: relative;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 8px;
  padding: 8px;
}
.chart-wrap canvas { max-width: 100%; max-height: 100%; }
.table-wrap {
  max-height: 260px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
}
th, td {
  padding: 7px 10px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  white-space: nowrap;
}
th {
  position: sticky;
  top: 0;
  background: var(--bg-elev);
  color: var(--text-dim);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tbody tr:hover { background: rgba(255, 255, 255, 0.03); }
td .key {
  display: inline-block;
  max-width: 480px;
  overflow: hidden;
  text-overflow: ellipsis;
  vertical-align: bottom;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  color: #c8d4e6;
}
td .key.url { color: #93c5fd; }
td .key.ip { color: #c4b5fd; }

.empty {
  text-align: center;
  color: var(--text-faint);
  font-size: 13px;
  padding: 40px 0;
}

footer {
  padding: 16px 28px 28px;
  color: var(--text-faint);
  font-size: 12px;
  border-top: 1px solid var(--border);
  margin-top: 8px;
}
footer p { margin: 4px 0; }
footer .small { font-size: 11px; }

/* scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #2a3a52; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #36486a; }