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fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn .3s ease-out}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.pulse{animation:pulse 1.5s ease-in-out infinite}.container{max-width:900px;margin:0 auto;padding:1.5rem;width:100%}.badge{display:inline-block;font-family:var(--font-mono);font-size:.75rem;padding:.2rem .6rem;border-radius:6px;font-weight:600}.badge.solved{background:var(--green-dim);color:var(--green);border:1px solid var(--green)}.badge.unsolved{background:var(--red-dim);color:var(--red);border:1px solid var(--red)}