/* Enhanced File Upload Styles */
.file-upload-wrapper {
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    background: linear-gradient(135deg, #f8f9fa 0%, rgba(13, 110, 253, 0.02) 100%);
    border: 2px dashed #dee2e6;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.file-upload-wrapper:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
    border-color: #0d6efd;
    background: linear-gradient(135deg, #e7f3ff 0%, rgba(13, 110, 253, 0.05) 100%);
}

.file-upload-wrapper:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.file-input {
    position: relative;
    z-index: 2;
    background: transparent;
    transition: all 0.3s ease;
}

.file-input:focus {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.file-upload-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 2px dashed #dee2e6;
    border-radius: 0.375rem;
    z-index: 1;
    transition: all 0.3s ease;
    pointer-events: none;
}

.file-upload-wrapper:hover .file-upload-overlay {
    border-color: #0d6efd;
    background: linear-gradient(135deg, #e7f3ff 0%, #cce7ff 100%);
}

.file-upload-wrapper.dragover .file-upload-overlay {
    border-color: #198754;
    background: linear-gradient(135deg, #d1e7dd 0%, #a3cfbb 100%);
    transform: scale(1.02);
}

/* File Selected State */
.file-upload-wrapper.file-selected {
    border-color: #198754;
    background: linear-gradient(135deg, #d1e7dd 0%, rgba(25, 135, 84, 0.05) 100%);
    box-shadow: 0 4px 16px rgba(25, 135, 84, 0.15);
}

.file-upload-wrapper.file-selected .file-upload-overlay {
    border-color: #198754;
    background: linear-gradient(135deg, #d1e7dd 0%, #a3cfbb 100%);
}

.file-upload-wrapper.file-selected .file-upload-icon i {
    color: #198754 !important;
    transform: scale(1.1);
}

.file-upload-wrapper.file-selected .file-upload-content h6 {
    color: #198754;
}

/* File Selected Animation */
@keyframes fileSelected {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

.file-upload-wrapper.file-selected {
    animation: fileSelected 0.3s ease-out;
}

.file-upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 120px;
}

.file-upload-content i {
    opacity: 0.7;
    transition: all 0.3s ease;
}

.file-upload-wrapper:hover .file-upload-content i {
    opacity: 1;
    transform: scale(1.1);
}

.file-preview {
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 0.375rem;
    padding: 0.75rem;
}

.file-preview-item {
    display: flex;
    align-items: center;
    padding: 0.5rem;
    background: white;
    border-radius: 0.25rem;
    margin-bottom: 0.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.file-preview-item:last-child {
    margin-bottom: 0;
}

.file-preview-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #e9ecef;
    border-radius: 0.25rem;
    margin-right: 0.75rem;
}

.file-preview-info {
    flex: 1;
}

.file-preview-name {
    font-weight: 500;
    color: #212529;
    margin-bottom: 0.25rem;
}

.file-preview-size {
    font-size: 0.875rem;
    color: #6c757d;
}

.file-preview-remove {
    background: none;
    border: none;
    color: #dc3545;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 0.25rem;
    transition: all 0.2s ease;
}

.file-preview-remove:hover {
    background: #f8d7da;
    color: #721c24;
}

/* File input states */
.file-input.is-valid {
    border-color: #198754;
}

.file-input.is-invalid {
    border-color: #dc3545;
}

.file-upload-wrapper.has-file .file-upload-overlay {
    display: none;
}

.file-upload-wrapper.has-file .file-input {
    background: #f8f9fa;
}

/* Progress bar for file uploads */
.file-upload-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: #e9ecef;
    border-radius: 0 0 0.375rem 0.375rem;
    overflow: hidden;
}

.file-upload-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #0d6efd, #198754);
    transition: width 0.3s ease;
    width: 0%;
}

/* Error states */
.file-upload-error {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.file-upload-wrapper.error .file-upload-overlay {
    border-color: #dc3545;
    background: linear-gradient(135deg, #f8d7da 0%, #f1aeb5 100%);
}

/* Success states */
.file-upload-wrapper.success .file-upload-overlay {
    border-color: #198754;
    background: linear-gradient(135deg, #d1e7dd 0%, #a3cfbb 100%);
}

/* File Upload Icon Animations */
.file-upload-icon i {
    transition: all 0.3s ease;
    animation: float 3s ease-in-out infinite;
}

.file-upload-wrapper:hover .file-upload-icon i {
    transform: scale(1.1);
    color: #0d6efd !important;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
}

/* Badge Enhancements */
.file-requirements .badge {
    transition: all 0.2s ease;
    border: 1px solid rgba(0, 0, 0, 0.1);
    font-weight: 500;
}

.file-requirements .badge:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Progress Bar Enhancements */
.file-upload-progress .progress {
    background-color: rgba(13, 110, 253, 0.1);
    border-radius: 10px;
    overflow: hidden;
}

.file-upload-progress .progress-bar {
    background: linear-gradient(90deg, #0d6efd 0%, #6610f2 100%);
    border-radius: 10px;
    transition: width 0.3s ease;
}

/* File Preview Card Enhancements */
.file-preview .card {
    transition: all 0.3s ease;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.file-preview .card:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.file-preview .remove-file {
    transition: all 0.2s ease;
}

.file-preview .remove-file:hover {
    transform: scale(1.1);
}

/* Error Alert Enhancements */
.file-error .alert {
    border-radius: 8px;
    border: none;
    box-shadow: 0 2px 8px rgba(220, 53, 69, 0.2);
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* File preview card styles */
.file-preview-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    border: 1px solid #e3e6f0;
    border-radius: 0.5rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.file-preview-card:hover {
    border-color: #4e73df;
    box-shadow: 0 4px 12px rgba(78, 115, 223, 0.15);
    transform: translateY(-1px);
}

.file-info {
    display: flex;
    align-items: center;
    flex: 1;
}

.file-name {
    font-weight: 500;
    color: #5a5c69;
    margin-left: 0.5rem;
}

.file-actions {
    display: flex;
    gap: 0.5rem;
}

.file-actions .btn {
    transition: all 0.2s ease;
}

.file-actions .btn:hover {
    transform: translateY(-1px);
}

/* Enhanced file preview styles */
.file-preview-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid #dee2e6;
    border-radius: 0.5rem;
    background-color: #fff;
    margin-top: 0.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: all 0.2s ease;
}

.file-preview-item:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    transform: translateY(-1px);
}

.file-preview-thumbnail {
    flex-shrink: 0;
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f8f9fa;
    border-radius: 0.375rem;
    border: 1px solid #dee2e6;
    overflow: hidden;
}

.file-preview-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0.25rem;
}

.pdf-preview {
    flex-direction: column;
    text-align: center;
}

.pdf-preview-text {
    font-size: 0.75rem;
    color: #6c757d;
    margin-top: 0.25rem;
}

.generic-preview {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.file-preview-details {
    flex: 1;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.file-preview-info {
    flex: 1;
    min-width: 0;
}

.file-preview-name {
    font-weight: 600;
    color: #212529;
    margin-bottom: 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}

.file-preview-size {
    font-size: 0.875rem;
    color: #6c757d;
    margin-bottom: 0.25rem;
}

.file-preview-type {
    font-size: 0.75rem;
    color: #868e96;
    font-style: italic;
}

.file-preview-actions {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

.file-preview-actions .btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .file-upload-wrapper {
        padding: 1.5rem 1rem;
        border-radius: 8px;
    }
    
    .file-upload-content {
        min-height: 100px;
        padding: 1rem;
    }
    
    .file-upload-content i {
        font-size: 2rem !important;
    }
    
    .file-upload-content h6 {
        font-size: 1rem;
    }
    
    .file-upload-content p {
        font-size: 0.9rem;
    }
    
    .file-upload-icon i {
        font-size: 2rem !important;
    }
    
    .file-requirements {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .file-requirements .badge {
        display: inline-block;
        margin: 0.2rem;
    }
    
    .file-preview-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .file-preview-icon {
        margin-right: 0;
        margin-bottom: 0.5rem;
    }
    
    .file-preview-card {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .file-actions {
        justify-content: center;
    }
    
    .file-preview-item {
        flex-direction: column;
        text-align: center;
    }
    
    .file-preview-details {
        width: 100%;
        flex-direction: column;
        gap: 1rem;
    }
    
    .file-preview-name {
        max-width: none;
        white-space: normal;
    }
    
    .file-preview-actions {
        justify-content: center;
        width: 100%;
    }
}

/* Animation for file drop */
@keyframes fileDropAnimation {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.file-upload-wrapper.file-dropped {
    animation: fileDropAnimation 0.3s ease;
}

/* Loading state */
.file-upload-wrapper.loading .file-upload-overlay {
    background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
    border-color: #ffc107;
}

.file-upload-wrapper.loading .file-upload-content::after {
    content: '';
    width: 20px;
    height: 20px;
    border: 2px solid #ffc107;
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-top: 0.5rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}