.nectar-file-validator {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.validator-header {
    margin-bottom: 2rem;
    text-align: center;
}

.validator-header h3 {
    margin: 0 0 0.5rem 0;
    color: #333;
}

.validator-header p {
    color: #666;
    margin: 0;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #333;
}

.form-group input[type="file"] {
    display: block;
    width: 100%;
    padding: 0.75rem;
    border: 2px dashed #ddd;
    border-radius: 4px;
    background: #f9f9f9;
    cursor: pointer;
}

.form-group input[type="file"]:hover {
    border-color: #4CAF50;
    background: #f0f8f0;
}

.form-group small {
    display: block;
    margin-top: 0.5rem;
    color: #666;
    font-size: 0.875rem;
}

.btn-validate {
    display: block;
    width: 100%;
    padding: 1rem;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-validate:hover:not(:disabled) {
    background: #45a049;
}

.btn-validate:disabled {
    background: #ccc;
    cursor: not-allowed;
}

#validation-results {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid #eee;
}

.results-header h4 {
    margin: 0 0 1rem 0;
    color: #333;
}

.summary-box {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
    text-align: center;
}

.summary-box.success {
    background: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.summary-box.error {
    background: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

.results-section {
    margin-bottom: 1.5rem;
    padding: 1rem;
    border-radius: 4px;
}

.results-section.errors {
    background: #fff3cd;
    border-left: 4px solid #dc3545;
}

.results-section.warnings {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
}

.results-section.info {
    background: #d1ecf1;
    border-left: 4px solid #17a2b8;
}

.results-section h5 {
    margin: 0 0 1rem 0;
    font-size: 1.1rem;
}

.results-section ul {
    margin: 0;
    padding-left: 1.5rem;
}

.results-section li {
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.results-section li em {
    color: #666;
    font-size: 0.9rem;
}