* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
}

.upload-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.file-upload {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.file-upload label {
    font-weight: 600;
    color: #555;
}

.file-upload input[type="file"] {
    padding: 10px;
    border: 2px dashed #667eea;
    border-radius: 5px;
    cursor: pointer;
}

.file-name {
    font-size: 14px;
    color: #28a745;
    font-weight: 500;
}

.options {
    margin-bottom: 20px;
}

.options label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

.options input {
    width: 100%;
    padding: 10px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

.compare-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s;
}

.compare-btn:hover {
    transform: translateY(-2px);
}

.compare-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.results {
    margin-top: 30px;
}

.result-section {
    margin-bottom: 30px;
}

.result-section h2 {
    color: #333;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #667eea;
}

.result-section h3 {
    color: #555;
    margin: 20px 0 10px 0;
    font-size: 18px;
}

.count {
    display: inline-block;
    background: #667eea;
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 14px;
    margin-left: 10px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background: #f8f9fa;
    font-weight: 600;
    color: #333;
}

tr:hover {
    background: #f8f9fa;
}

.error {
    background: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 5px;
    margin-top: 20px;
}

.success {
    background: #d4edda;
    color: #155724;
    padding: 15px;
    border-radius: 5px;
    margin-top: 20px;
}

@media (max-width: 768px) {
    .upload-section {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 20px;
    }
}