:root{--theme:light;--bg-primary:#ffffff;--bg-secondary:#f9fafb;--text-primary:#111827;--text-secondary:#6b7280;--border-color:#e5e7eb}html.dark-mode{--theme:dark;--bg-primary:#0f172a;--bg-secondary:#1e293b;--text-primary:#f8fafc;--text-secondary:#cbd5e1;--border-color:#475569}.theme-toggle-btn{background:transparent;border:2px solid var(--border-color);cursor:pointer;padding:0.5rem;display:flex;align-items:center;justify-content:center;color:var(--text-primary);transition:all 0.3s ease;border-radius:0.5rem;width:2.5rem;height:2.5rem;margin:0 0.5rem}.theme-toggle-btn:hover{color:#667eea;transform:scale(1.1)}.theme-toggle-btn svg{width:1.25rem;height:1.25rem}.theme-toggle-btn .moon-icon{display:none}html.dark-mode .theme-toggle-btn .sun-icon{display:none}html.dark-mode .theme-toggle-btn .moon-icon{display:block}.glossary-search-wrapper{margin:2rem 0}.search-input-group{position:relative;display:flex;align-items:center}.glossary-search-input{width:100%;padding:0.75rem 1rem 0.75rem 2.5rem;font-size:1rem;border:2px solid var(--border-color);border-radius:0.5rem;background-color:var(--bg-primary);color:var(--text-primary);transition:all 0.3s ease}.glossary-search-input:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px rgba(102,126,234,0.1)}.search-icon{position:absolute;left:0.75rem;width:1.25rem;height:1.25rem;color:var(--text-secondary);pointer-events:none}.glossary-search-results{position:absolute;top:100%;left:0;right:0;background-color:var(--bg-primary);border:1px solid var(--border-color);border-top:none;border-radius:0 0 0.5rem 0.5rem;max-height:400px;overflow-y:auto;z-index:100;box-shadow:0 10px 15px -3px var(--shadow-medium)}.glossary-search-results.hidden{display:none}.search-result-item{display:block;padding:1rem;text-decoration:none;color:var(--text-primary);border-bottom:1px solid var(--border-color);transition:background-color 0.2s ease}.search-result-item:hover,.search-result-item:focus{background-color:var(--bg-secondary);outline:none}.result-title{font-weight:600;margin-bottom:0.25rem;color:#667eea}.result-definition{font-size:0.875rem;color:var(--text-secondary);line-height:1.4}.result-title mark,.result-definition mark{background-color:rgba(102,126,234,0.2);font-weight:600}.search-no-results{padding:2rem 1rem;text-align:center;color:var(--text-secondary)}.search-no-results small{display:block;font-size:0.875rem;margin-top:0.5rem;opacity:0.7}.pwa-update-notification{position:fixed;bottom:2rem;right:2rem;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:white;padding:1rem;border-radius:0.5rem;box-shadow:0 10px 25px rgba(0,0,0,0.2);z-index:1000;animation:slideUp 0.3s ease}@keyframes slideUp{from{transform:translateY(100px);opacity:0}to{transform:translateY(0);opacity:1}}.notification-content{display:flex;align-items:center;gap:1rem}.notification-content p{margin:0;font-weight:500}.btn-update{background:white;color:#667eea;border:none;padding:0.5rem 1rem;border-radius:0.25rem;font-weight:600;cursor:pointer;transition:opacity 0.2s ease}.btn-update:hover{opacity:0.9}.pwa-update-notification.dismissed{animation:slideDown 0.3s ease forwards}@keyframes slideDown{from{transform:translateY(0);opacity:1}to{transform:translateY(100px);opacity:0}}@media (max-width:640px){.pwa-update-notification{right:1rem;left:1rem;bottom:1rem}.glossary-search-results{max-height:300px}.theme-toggle-container{margin-left:0.5rem}}.glossary-search-input:focus,.theme-toggle-btn:focus{outline:2px solid #667eea;outline-offset:2px}.search-result-item:focus{outline:2px solid #667eea;outline-offset:-2px}@media (max-width:768px){.glossary-search-wrapper{margin:1rem 0}.glossary-search-input{font-size:16px}.search-result-item{padding:0.75rem}}@media print{.glossary-search-wrapper,.theme-toggle-container,.pwa-update-notification{display:none}}