.not-found-container{background:linear-gradient(135deg, var(--color-surface-section) 0%, var(--color-surface-section-alt) 100%);text-align:center;justify-content:center;align-items:center;height:80vh;padding:2rem;display:flex}.not-found-content{background:var(--color-surface-overlay);max-width:500px;box-shadow:var(--shadow-card);border-radius:12px;flex-direction:column;align-items:center;gap:1rem;padding:2rem;display:flex}.not-found-content h1{color:var(--color-danger);margin:1rem 0;font-size:6rem;font-weight:700;line-height:1}.not-found-content h2{color:var(--color-text-primary);max-width:80%;margin-bottom:1rem;font-size:2rem}.not-found-content p{color:var(--color-text-muted);max-width:90%;margin-bottom:2rem}.not-found-content .btn{padding:.75rem 2rem;font-weight:500;transition:all .3s}.not-found-content .btn:hover{transform:translateY(-2px)}.error-icon{color:#ff6b6b;width:80px;height:80px;margin:0;animation:2s infinite bounce}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}