body { background-color: #f8f9fa; }
        .preview-box { position: relative; cursor: pointer; border: 1px solid #dee2e6; background: #fff; border-radius: 0.375rem; height: 200px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
        .preview-img { height: 100%; width: 100%; object-fit: cover; cursor: zoom-in; }
        
        .btn-remove {
            position: absolute; top: 5px; right: 5px; z-index: 20;
            background: rgba(220, 53, 69, 0.9); color: white; border: none; border-radius: 50%;
            width: 28px; height: 28px; display: none; align-items: center; justify-content: center;
            font-size: 16px; line-height: 1;
        }
        .photo-slot:hover .btn-remove { display: flex; }
        .btn-trigger { font-weight: bold; height: 60px; display: flex; align-items: center; justify-content: center; }
        
        /* Úprava navbaru pro mobilní zobrazení */
        @media (max-width: 991px) {
            .navbar-nav { padding-top: 15px; border-top: 1px solid #dee2e6; margin-top: 10px; }
            .user-info { margin-bottom: 10px; display: block; }
        }