:root {
  --purple:#6F3FF5;
  --bg:#0f0f1a;
  --card:#1a1a2f;
}

body {
  margin:0;
  font-family:Arial, sans-serif;
  background:var(--bg);
  color:white;
}

.header {
  text-align:center;
  padding:32px 16px 16px 16px;
}

.logo { width:140px; }

h1 {
  color:var(--purple);
  margin-top:10px;
}

/* Cards */
.metrics {
  display:flex;
  justify-content:center;
  gap:24px;
  flex-wrap:wrap;
  margin:30px 0;
}

.card {
  background:var(--card);
  padding:24px 32px;
  border-radius:16px;
  min-width:220px;
  text-align:center;
  box-shadow:0 6px 20px rgba(0,0,0,0.4);
}

.card.primary {
  border:2px solid var(--purple);
}

.label {
  font-size:14px;
  opacity:0.75;
  margin-bottom:10px;
}

.value {
  font-size:40px;
  font-weight:700;
}

.value.small {
  font-size:26px;
}

/* Range Selector */
.range-wrapper {
  display:flex;
  justify-content:center;
  margin:20px 0;
}

.range-selector {
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}

.range-selector button {
  background:#1a1a2f;
  color:white;
  border:1px solid var(--purple);
  padding:8px 16px;
  border-radius:20px;
  cursor:pointer;
  transition:all 0.2s ease;
}

.range-selector button:hover {
  background:var(--purple);
}

.range-selector button.active {
  background:var(--purple);
}

/* Chart */
.chart-section {
  width:100%;
  max-width:1100px;
  margin:0 auto 40px auto;
  height:420px;
  padding:0 16px;
}

canvas {
  width:100% !important;
  height:100% !important;
}