@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600&display=swap');

:root {
  color-scheme: dark;
  --bg: #050505;
  --panel: #0d0d0f;
  --text: #e3f4e3;
  --muted: #7fa07f;
  --accent: #54ff7f;
  --danger: #ff4d6d;
  --cool: #3aa8ff;
  --border: #1d2721;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: radial-gradient(circle at 20% 20%, #0b1c10 0%, #050505 45%);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-header {
  padding: 16px clamp(16px, 3vw, 32px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 4px;
}

h1 {
  margin: 0;
  font-size: clamp(24px, 4vw, 32px);
}

.lede {
  margin: 4px 0 0;
  color: var(--muted);
}

.controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(140px, 1fr));
  gap: 12px 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 12px 14px;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.control {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 140px;
}

label { font-size: 12px; color: var(--muted); }
input[type="range"] { width: 100%; }

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 0 clamp(16px, 3vw, 32px) 24px;
}

#canvas-container {
  position: relative;
  width: 100%;
  height: min(74vh, 720px);
  background: #000;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35);
}

.info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
}

.info h2 {
  margin: 0 0 6px;
  font-size: 16px;
}

.explain {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.explain h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

.explain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.explain-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px;
  padding: 12px 14px;
}

.explain-card h3 {
  margin: 0 0 6px;
  font-size: 14px;
}

.explain-card p,
.explain-note {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.explain-note {
  margin-top: 12px;
}

ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.4;
}

.stats {
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 6px;
}

.stat-line {
  display: flex;
  justify-content: space-between;
  padding: 6px 8px;
  background: rgba(255,255,255,0.03);
  border-radius: 8px;
}

@media (max-width: 960px) {
  .controls { grid-template-columns: repeat(2, minmax(140px, 1fr)); }
}

@media (max-width: 640px) {
  .controls { width: 100%; }
  .controls { grid-template-columns: 1fr; }
  #canvas-container { height: 62vh; }
}