:root {
  --bg-page: #0f1219;
  --bg-solid: #1f232b;
  --bg-glass: rgba(31, 35, 43, 0.62);
  --ink: #e5e7eb;
  --ink-soft: #a6adbb;
  --accent: #66bb6a;
  --accent-2: #2b303b;
  --ring: rgba(102, 187, 106, 0.4);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu,
    Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--ink);
  background: var(--bg-page);
  overflow-x: hidden;
}

#game-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  z-index: 0;
  pointer-events: none;
}
#hud {
  position: fixed;
  right: 12px;
  top: 10px;
  z-index: 2;
  font: 600 14px ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  background: rgba(0,0,0,0.45);
  color: var(--ink);
  padding: 6px 10px;
  border-radius: 10px;
  backdrop-filter: blur(4px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255,255,255,0.08);
}

.app { position: relative; z-index: 1; min-height: 100vh; display: grid; grid-template-rows: auto 1fr auto; }
header { display: flex; align-items: center; gap: 20px; padding: 16px 24px; }
header .brand { font-weight: 800; letter-spacing: 0.2px; font-size: 20px; }
header nav { display: flex; gap: 12px; flex-wrap: wrap; }
header a { text-decoration: none; color: var(--ink-soft); padding: 8px 12px; border-radius: 999px; border: 1px solid transparent; }
header a:hover { color: var(--ink); background: rgba(255,255,255,0.06); }
header a.active { color: #0b0f14; background: var(--accent); border-color: var(--accent); box-shadow: 0 6px 18px var(--ring); }

main { width: min(1100px, 100%); margin: 0 auto; padding: 24px; }
.card { background: var(--bg-solid); border-radius: 18px; border: 1px solid rgba(255,255,255,0.06); box-shadow: 0 10px 35px rgba(0, 0, 0, 0.35); padding: 22px; }
.translucent .card { background: var(--bg-glass); backdrop-filter: blur(8px) saturate(1.05); }

.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 900px) { .grid.cols-2, .grid.cols-3 { grid-template-columns: 1fr; } }
.muted { color: var(--ink-soft); }
.badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(102,187,106,0.12); color: #b9f6ca;
         padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; border: 1px solid rgba(102,187,106,0.25); }
footer { padding: 30px 24px; color: var(--ink-soft); display: flex; justify-content: center; }

.subnav { display: flex; gap: 10px; margin: 10px 0 18px; flex-wrap: wrap; }
.subnav a { text-decoration: none; padding: 6px 10px; border-radius: 10px; border: 1px solid rgba(255,255,255,0.08); color: var(--ink-soft); background: var(--accent-2); }
.subnav a.active { background: var(--accent); border-color: var(--accent); color: #0b0f14; }

.skip { position: absolute; left: -1000px; top: -1000px; }
.skip:focus { left: 12px; top: 12px; z-index: 10; background: black; color: white; padding: 10px 12px; border-radius: 12px; }