:root {
  --bg: #07081a;
  --panel: #12143a;
  --edge: #2b2f7a;
  --text: #e8e9ff;
  --muted: #9aa0d8;
  --accent: #9ef01a;
  --pixel: "Press Start 2P", ui-monospace, monospace;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at 50% 0, #1a1d55, var(--bg) 60%);
  color: var(--text);
  font-family: system-ui, sans-serif;
}

header { text-align: center; padding: 32px 16px 8px; }
h1 { font-family: var(--pixel); font-size: clamp(20px, 5vw, 36px); color: var(--accent); margin: 0 0 12px; text-shadow: 0 0 12px #9ef01a88; }
header p { color: var(--muted); margin: 0; }

main { max-width: 1100px; margin: 0 auto; padding: 24px 16px 48px; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }

.card {
  text-align: left;
  font: inherit;
  color: inherit;
  background: var(--panel);
  border: 2px solid var(--edge);
  border-radius: 12px;
  padding: 24px;
  cursor: pointer;
  transition: transform .15s, border-color .15s, box-shadow .15s;
}
.card:hover, .card:focus-visible { transform: translateY(-4px); border-color: var(--accent); box-shadow: 0 8px 24px #9ef01a33; outline: none; }
.card .icon { font-size: 40px; }
.card h2 { font-family: var(--pixel); font-size: 15px; margin: 16px 0 12px; }
.card p { color: var(--muted); line-height: 1.5; margin: 0 0 8px; }

.keys { font-size: 13px; color: var(--accent) !important; }

.bar { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 16px; }
.bar h2 { font-family: var(--pixel); font-size: 14px; margin: 0; }
#back {
  font: 12px var(--pixel);
  color: var(--text);
  background: var(--panel);
  border: 2px solid var(--edge);
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
}
#back:hover { border-color: var(--accent); }

canvas {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  max-height: calc(100vh - 140px);
  border: 2px solid var(--edge);
  border-radius: 8px;
  background: #000;
}