/* CSS is how you can add style to your website, such as colors, fonts, and positioning of your
   HTML content. To learn how to do something, just try searching Google for questions like
   "how to change link color." */



:root { --bg:#f7f7fb; --ink:#111; --card:#fff; --accent:#3a86ff; }
* { box-sizing:border-box; }
body { margin:0; font-family:system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; color:var(--ink); background:var(--bg); }
a { color:var(--accent); text-decoration:none; }
.container { max-width:900px; margin:0 auto; padding:1rem 1rem 2rem; }
h1, h2 { margin:0.5rem 0 0.75rem; }
.grid { display:grid; gap:1rem; grid-template-columns:repeat(auto-fit, minmax(220px,1fr)); margin:1rem 0; }
.tile { display:block; background:var(--card); padding:1rem; border-radius:16px; border:1px solid #e6e6ee; box-shadow:0 1px 3px rgba(0,0,0,0.05); text-align:center; font-weight:600; }
.tile:hover { transform:translateY(-1px); }
hr { border:none; border-top:1px solid #e6e6ee; margin:1.25rem 0; }
.back { display:inline-block; margin:0.5rem 0 0 0.5rem; }
.note { max-width:900px; margin:0.75rem auto; padding:0.75rem 1rem; background:#fff; border:1px solid #eee; border-radius:12px; color:#333; }
.play { position:fixed; z-index:9999; right:12px; bottom:12px; padding:0.7rem 1rem; border-radius:999px; border:1px solid #ddd; background:#fff; }
.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin: 1rem 0;
}

.tile {
  display: block;
  background: var(--card);
  padding: 1.2rem;
  border-radius: 16px;
  border: 1px solid #e6e6ee;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  text-align: center;
  font-weight: 600;
  line-height: 1.4;
}