* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: #0b1120;
  color: #e2e8f0;
  line-height: 1.5;
}

header, main, footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1rem;
}

header { padding-top: 2rem; }
h1 { margin: 0; font-size: 1.6rem; }
.subtitle { color: #94a3b8; margin: 0.25rem 0 0.5rem; }
.muted { color: #64748b; font-size: 0.85rem; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.75rem;
  margin: 1.25rem 0;
}

.card {
  background: #111a2e;
  border: 1px solid #1e293b;
  border-radius: 10px;
  padding: 0.9rem;
}
.card h3 { margin: 0 0 0.4rem; font-size: 0.95rem; font-weight: 600; }
.card .price { font-size: 1.15rem; font-weight: 700; }
.card .meta { margin-top: 0.25rem; }

.panels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.panel {
  background: #111a2e;
  border: 1px solid #1e293b;
  border-radius: 10px;
  padding: 1rem;
}
.panel h2 { margin: 0 0 0.5rem; font-size: 1.05rem; }
.panel .big { font-size: 2rem; font-weight: 800; margin-bottom: 0.5rem; }
.panel dl { display: grid; grid-template-columns: 1fr; gap: 0.15rem; margin: 0; }
.panel dt { color: #94a3b8; font-size: 0.8rem; }
.panel dd { margin: 0 0 0.35rem; font-weight: 600; }

.pos { color: #4ade80; }
.neg { color: #f87171; }

#history, #how { margin-bottom: 2rem; }
#history h2, #how h2 { font-size: 1.15rem; }

.toggles { display: flex; gap: 1rem; margin-bottom: 0.5rem; font-size: 0.9rem; }
.toggles label { cursor: pointer; }

.chart-wrap {
  background: #111a2e;
  border: 1px solid #1e293b;
  border-radius: 10px;
  padding: 0.75rem;
  height: 360px;
}

#how ul { padding-left: 1.25rem; }
#how li { margin-bottom: 0.4rem; }

footer { padding: 1rem 1rem 2rem; }