/* Light UI */
.typing-app{max-width:900px;margin:auto;padding:24px;background:#fff;border-radius:18px;
box-shadow:0 20px 50px rgba(0,0,0,.12);font-family:Arial}
.easy{background:#16a34a;color:#fff}
.medium{background:#f59e0b;color:#fff}
.hard{background:#dc2626;color:#fff}
.diff{padding:10px 16px;border-radius:12px;border:none}
.diff:not(.active){opacity:.6}
.stats{display:flex;justify-content:space-around;margin:10px 0}
.controls{display:flex;gap:10px;justify-content:center}