:root {
  --bg: #111217;
  --panel: #181b1f;
  --panel-2: #1f2226;
  --border: #2a2d33;
  --ink: #d8d9da;
  --muted: #8e9297;
  --accent: #6ccf8e;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 20px;
  background: linear-gradient(180deg, #16181d, #111217);
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand h1 { font-size: 18px; font-weight: 600; margin: 0; letter-spacing: 0.2px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }

.range { display: flex; align-items: center; gap: 6px; }
.range button {
  background: var(--panel-2);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  font-size: 13px;
}
.range button:hover { border-color: #3a3e45; }
.range button.active { background: #24402f; border-color: #2f5d43; color: #bfe9cd; }
.status { color: var(--muted); font-size: 12px; margin-left: 10px; }

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  padding: 16px 20px 32px;
}
@media (max-width: 900px) { .grid { grid-template-columns: 1fr; } }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}
.panel-head h2 { font-size: 14px; font-weight: 600; margin: 0; color: #e6e7e8; }
.meta { font-size: 12px; color: var(--muted); }
.chart { height: 300px; padding: 8px; }