:root {
  --bg: #0b0f14;
  --card: #141a22;
  --border: #1f2630;
  --text: #ffffff;
  --muted: #9aa4b2;
  --accent: #4da3ff;
  --banner: none;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(600px at 20% 10%, #1a2330, transparent),
    radial-gradient(800px at 80% 0%, #111826, transparent);
}

.container {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 24px;
}

header {
  padding: 24px;
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(0,0,0,.55), rgba(0,0,0,.75)),
    var(--banner);
  background-size: cover;
  background-position: center;
}

.header-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

#icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: none;
}

header h1 {
  margin: 0;
  font-size: 28px;
}

header p {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.card {
  background: linear-gradient(180deg, #161c26, #121721);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 20px;
}

.label {
  color: var(--muted);
  font-size: 13px;
}

.value {
  margin-top: 10px;
  font-size: 36px;
  font-weight: 700;
  color: var(--accent);
}

.controls {
  margin-top: 24px;
}

select {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 14px;
}

.charts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 24px;
}

.chart-card {
  background: linear-gradient(180deg, #161c26, #121721);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 20px;
}

@media (max-width: 800px) {
  .cards { grid-template-columns: 1fr; }
  .charts { grid-template-columns: 1fr; }
}