:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;line-height:1.5}*{box-sizing:border-box}body{background:#f5f5f7;min-height:100vh;margin:0}.app{color:#222;max-width:720px;margin:0 auto;padding:1rem;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif}header h1{margin:1rem 0;font-size:1.75rem}.filters{flex-wrap:wrap;gap:.5rem;margin-bottom:1rem;display:flex}.chip{cursor:pointer;color:#222;background:#fff;border:1px solid #ddd;border-radius:999px;padding:.5rem 1rem;font-size:.95rem}.chip.active{color:#fff;background:#222;border-color:#222}.card{background:#fff;border-radius:12px;margin-bottom:1rem;display:flex;overflow:hidden;box-shadow:0 1px 3px #00000014}.card-stripe{background:var(--accent,#888);flex:none;width:8px}.card-body{flex:1;padding:1rem}.card-meta{color:#666;font-size:.85rem}.card-title{margin:.25rem 0 .75rem;font-size:1.15rem}.card-actions{flex-wrap:wrap;gap:.5rem;display:flex}.btn{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:.5rem .9rem;font-size:.9rem;font-weight:500;text-decoration:none}.btn.answer{background:#2e7d32}.empty{text-align:center;color:#888;padding:2rem}