.not-found-container{min-height:calc(100vh - 200px);display:flex;align-items:center;justify-content:center;padding:2rem 1rem;background:var(--bg-secondary)}.not-found-content{max-width:800px;width:100%;text-align:center;animation:fadeIn .6s ease-in}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.not-found-animation{margin-bottom:2rem}.not-found-gif{width:150px;height:150px;object-fit:contain;filter:drop-shadow(0 4px 12px rgba(0,0,0,.1))}.not-found-text{background:var(--card-bg);border-radius:var(--border-radius);padding:3rem 2rem;box-shadow:var(--box-shadow)}.not-found-title{display:flex;align-items:center;justify-content:center;gap:1rem;margin-bottom:1.5rem;flex-wrap:wrap}.error-code{font-size:4rem;font-weight:700;color:var(--primary-color);line-height:1;font-family:var(--mono)}.error-divider{font-size:3rem;color:var(--border-color);font-weight:300}.error-message{font-size:2rem;font-weight:600;color:var(--text-color);line-height:1}.not-found-description{font-size:1.1rem;color:var(--text-secondary);margin-bottom:2rem;line-height:1.6}.not-found-actions{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;margin-bottom:3rem}.not-found-actions .btn-primary,.not-found-actions .btn-secondary{padding:.75rem 1.5rem;border-radius:var(--border-radius);text-decoration:none;font-weight:600;display:inline-flex;align-items:center;gap:.5rem;transition:all var(--transition-speed);font-size:1rem;border:none;cursor:pointer}.not-found-actions .btn-primary{background:var(--primary-color);color:#fff}.not-found-actions .btn-primary:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:0 4px 12px rgba(52,152,219,.3)}.not-found-actions .btn-secondary{background:var(--bg-secondary);color:var(--text-color);border:2px solid var(--border-color)}.not-found-actions .btn-secondary:hover{background:var(--bg-color);border-color:var(--primary-color);color:var(--primary-color);transform:translateY(-2px)}.not-found-suggestions{margin-top:2rem;padding-top:2rem;border-top:1px solid var(--border-color)}.not-found-suggestions h2{font-size:1.2rem;color:var(--text-color);margin-bottom:1rem;font-weight:600}.not-found-suggestions ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));grid-gap:1rem;gap:1rem}.not-found-suggestions li{margin:0}.not-found-suggestions a{display:flex;align-items:center;gap:.75rem;padding:1rem;background:var(--bg-secondary);border-radius:var(--border-radius);text-decoration:none;color:var(--text-color);transition:all var(--transition-speed);border:1px solid transparent}.not-found-suggestions a:hover{background:var(--bg-color);border-color:var(--primary-color);color:var(--primary-color);transform:translateX(5px)}.not-found-suggestions a i{font-size:1.2rem;width:24px;text-align:center;color:var(--primary-color)}:root.dark-mode .not-found-container{background:var(--bg-color)}:root.dark-mode .not-found-gif{filter:drop-shadow(0 4px 12px rgba(255,255,255,.1))}:root.dark-mode .not-found-actions .btn-primary{box-shadow:0 2px 8px rgba(52,152,219,.2)}:root.dark-mode .not-found-actions .btn-primary:hover{box-shadow:0 4px 16px rgba(52,152,219,.4)}@media (max-width:768px){.not-found-container{padding:1rem;min-height:calc(100vh - 150px)}.not-found-text{padding:2rem 1.5rem}.error-code{font-size:3rem}.error-divider{font-size:2rem}.error-message{font-size:1.5rem}.not-found-description{font-size:1rem}.not-found-suggestions ul{grid-template-columns:1fr}.not-found-actions{flex-direction:column}.not-found-actions .btn-primary,.not-found-actions .btn-secondary{width:100%;justify-content:center}}@media (max-width:480px){.not-found-gif{width:100px;height:100px}.not-found-title{flex-direction:column;gap:.5rem}.error-divider{display:none}.error-code{font-size:2.5rem}.error-message{font-size:1.25rem}}:root.sepia-mode .not-found-actions .btn-primary{background:var(--primary-color)}:root.sepia-mode .not-found-actions .btn-primary:hover{background:var(--primary-hover)}