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0}}.loading-spinner{display:inline-block;width:20px;height:20px;border:2px solid rgba(255,255,255,.1);border-top-color:var(--accent-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.contextual-hint{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;background:linear-gradient(135deg,#6fd2ff1f,#3bb7ad14);border:1px solid rgba(111,210,255,.25);border-radius:var(--radius-sm);font-size:.8rem;color:var(--text-secondary);animation:hint-fade-in .3s ease}@keyframes hint-fade-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.hint-message{color:var(--text-primary)}.hint-shortcut{padding:2px 6px;background:#ffffff14;border:1px solid rgba(255,255,255,.12);border-radius:4px;font-family:var(--font-mono);font-size:.75rem;color:var(--accent-primary)}.hint-dismiss{display:flex;align-items:center;justify-content:center;padding:4px;background:transparent;border:none;border-radius:4px;color:var(--text-secondary);cursor:pointer;opacity:.6;transition:opacity var(--transition-fast),background var(--transition-fast)}.hint-dismiss:hover{opacity:1;background:#ffffff14}.tip-of-the-day{padding:16px;background:linear-gradient(135deg,#f3c26b14,#f0c86d0a);border:1px solid rgba(243,194,107,.2);border-radius:var(--radius-md);margin-bottom:16px}.tip-header{display:flex;align-items:center;gap:8px;margin-bottom:8px}.tip-icon{color:var(--accent-secondary)}.tip-label{font-weight:600;font-size:.85rem;color:var(--accent-secondary)}.tip-category{margin-left:auto;padding:2px 8px;background:#f3c26b26;border-radius:10px;font-size:.7rem;text-transform:uppercase;letter-spacing:.05em;color:var(--accent-secondary)}.tip-content{font-size:.9rem;line-height:1.5;color:var(--text-primary);margin-bottom:12px}.tip-dismiss{font-size:.8rem;padding:6px 16px}.mastery-progress{padding:16px;background:linear-gradient(135deg,#7bd3890f,#3bb7ad0a);border:1px solid rgba(123,211,137,.15);border-radius:var(--radius-md)}.mastery-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.mastery-title{font-weight:600;font-size:.85rem;color:var(--text-primary)}.mastery-percentage{font-family:var(--font-mono);font-size:.9rem;color:var(--accent-tool)}.mastery-bar{height:6px;background:#ffffff14;border-radius:3px;overflow:hidden;margin-bottom:14px}.mastery-fill{height:100%;background:linear-gradient(90deg,var(--accent-tool),var(--accent-llm));border-radius:3px;transition:width .5s ease}.mastery-milestones{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:8px;list-style:none;margin:0;padding:0}.mastery-milestone{display:flex;align-items:center;gap:6px;padding:6px 8px;background:#ffffff08;border-radius:var(--radius-sm);font-size:.75rem;color:var(--text-secondary);opacity:.6;transition:opacity var(--transition-fast),background var(--transition-fast)}.mastery-milestone.completed{opacity:1;background:#7bd3891a;color:var(--text-primary)}.milestone-check{display:flex;align-items:center;justify-content:center;width:16px;height:16px;border-radius:50%;background:#ffffff14;color:var(--accent-tool)}.mastery-milestone.completed .milestone-check{background:var(--accent-tool);color:var(--bg-base)}:focus-visible{outline:2px solid var(--accent-primary);outline-offset:2px}button:focus-visible,[role=button]:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--accent-primary);outline-offset:2px}.skip-link{position:absolute;top:-100%;left:50%;transform:translate(-50%);padding:12px 24px;background:var(--accent-primary);color:var(--bg-base);font-weight:600;border-radius:var(--radius-sm);z-index:10000;transition:top .2s ease}.skip-link:focus{top:16px}.sr-only,.live-region{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}