/* File Upload Styles for Abstract Submission */
.file-upload-container {
    position: relative;
}

.file-upload-area {
    border: 2px dashed #ddd;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    background: #f8f9fa;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    user-select: none;
    -webkit-user-select: none;
    min-height: 150px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.file-upload-area:hover,
.file-upload-area.dragover {
    border-color: var(--primary-color);
    background: rgba(var(--primary-color-rgb), 0.05);
}

.upload-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.upload-link {
    color: var(--primary-color);
    text-decoration: underline;
    cursor: pointer;
}

.file-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 1;
}

.file-info {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(var(--primary-color-rgb), 0.05);
    border-radius: 8px;
    border: 1px solid rgba(var(--primary-color-rgb), 0.2);
}

.file-details {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.file-icon {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.file-text {
    flex: 1;
}

.file-name {
    display: block;
    font-weight: 600;
    color: #333;
}

.file-size {
    display: block;
    font-size: 0.85rem;
    color: #666;
}

.remove-file {
    background: #dc3545;
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
}

.remove-file:hover {
    background: #c82333;
    transform: scale(1.1);
}

/* Radio Button Validation Styles */
.form-check-input.is-valid {
    border-color: var(--success-color, #10b981);
}

.form-check-input.is-valid:checked {
    background-color: var(--success-color, #10b981);
    border-color: var(--success-color, #10b981);
}

.form-check-input.is-invalid {
    border-color: var(--danger-color, #ef4444);
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.15);
}

.form-check-input.is-invalid:checked {
    background-color: var(--danger-color, #ef4444);
    border-color: var(--danger-color, #ef4444);
}

/* Radio Button Label Validation */
.radio-button-label {
    position: relative;
    transition: all 0.3s ease;
}

.form-check-input.is-invalid ~ .radio-button-label {
    color: var(--danger-color, #ef4444);
}

.form-check-input.is-valid ~ .radio-button-label {
    color: var(--success-color, #10b981);
}

/* File Input Validation */
.file-input.is-valid {
    border-color: var(--success-color, #10b981);
}

.file-input.is-invalid {
    border-color: var(--danger-color, #ef4444);
}

.file-upload-area.is-valid {
    border-color: var(--success-color, #10b981);
    background: rgba(16, 185, 129, 0.05);
}

.file-upload-area.is-invalid {
    border-color: var(--danger-color, #ef4444);
    background: rgba(239, 68, 68, 0.05);
}

/* Responsive File Upload */
@media (max-width: 768px) {
    .file-upload-area {
        padding: 1.5rem 1rem;
    }
    
    .upload-icon {
        font-size: 2rem;
    }
}