.xp-info-btn{width:18px;height:18px;color:var(--text-muted);opacity:.6;cursor:pointer;background:none;border:none;padding:0}.xp-info-btn:hover{opacity:1;color:var(--accent-primary)}.xp-modal-overlay{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.45);backdrop-filter:blur(4px);animation:xpFadeIn .15s ease-out;padding:16px}.xp-modal-content{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;padding:20px;max-width:420px;width:100%;max-height:80vh;overflow-y:auto;box-shadow:0 20px 60px rgba(0,0,0,.3);animation:xpSlideUp .2s ease-out}.xp-section{margin-bottom:14px;padding:12px;background:var(--bg-glass);border:1px solid var(--border);border-radius:10px}.xp-section:last-child{margin-bottom:0}.xp-section-title{font-size:13px;font-weight:700;color:var(--text-primary);margin-bottom:6px}.xp-section-desc{font-size:12px;color:var(--text-secondary);line-height:1.5;margin:0}.xp-formula{margin-top:8px;padding:8px 12px;background:linear-gradient(135deg,rgba(226,85,85,.08),rgba(168,85,247,.08));border:1px solid rgba(226,85,85,.15);border-radius:8px;font-family:SF Mono,Fira Code,monospace;font-size:12px;font-weight:600;color:var(--accent-primary);text-align:center}.xp-table{display:flex;flex-direction:column;gap:4px;margin-top:6px}.xp-table-row{display:flex;align-items:center;justify-content:space-between;padding:4px 8px;border-radius:6px;font-size:12px;font-weight:600;color:var(--text-primary);background:rgba(0,0,0,.02)}.xp-badge{font-size:11px;font-weight:700;padding:2px 8px;border-radius:4px;text-transform:uppercase;letter-spacing:.5px}.xp-badge-easy{background:rgba(34,197,94,.1);color:#16a34a}.xp-badge-medium{background:rgba(245,158,11,.1);color:#d97706}.xp-badge-hard{background:rgba(239,68,68,.1);color:#dc2626}@keyframes xpFadeIn{0%{opacity:0}to{opacity:1}}@keyframes xpSlideUp{0%{opacity:0;transform:translateY(12px) scale(.97)}to{opacity:1;transform:translateY(0) scale(1)}}.xp-modal-content::-webkit-scrollbar{width:4px}.xp-modal-content::-webkit-scrollbar-track{background:transparent}.xp-modal-content::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}