* {
    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;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
}

main {
    padding: 40px;
}

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

.upload-area {
    border: 3px dashed #667eea;
    border-radius: 15px;
    padding: 60px 40px;
    text-align: center;
    background: #f8f9ff;
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-area:hover {
    background: #f0f2ff;
    border-color: #764ba2;
    transform: translateY(-2px);
}

.upload-area.drag-over {
    background: #e8ebff;
    border-color: #764ba2;
    transform: scale(1.02);
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.upload-area h2 {
    color: #667eea;
    margin-bottom: 15px;
}

.btn-upload {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 12px 30px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    margin: 15px 0;
}

.btn-upload:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.file-hint {
    color: #666;
    font-size: 0.9rem;
    margin-top: 10px;
}

.preview-section {
    margin-bottom: 30px;
    padding: 30px;
    background: #f8f9ff;
    border-radius: 15px;
}

.preview-section h2 {
    color: #667eea;
    margin-bottom: 20px;
}

.pdf-container {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    text-align: center;
    overflow-x: auto;
}

#pdfCanvas {
    max-width: 100%;
    height: auto;
    border: 1px solid #ddd;
}

.controls {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary,
.btn-secondary {
    padding: 12px 30px;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #e0e0e0;
    color: #333;
}

.btn-secondary:hover {
    background: #d0d0d0;
    transform: translateY(-2px);
}

.results-section {
    margin-bottom: 30px;
    padding: 30px;
    background: #f8f9ff;
    border-radius: 15px;
}

.results-section h2 {
    color: #667eea;
    margin-bottom: 20px;
}

.result-item {
    background: white;
    padding: 20px;
    margin-bottom: 15px;
    border-radius: 10px;
    border-left: 5px solid #667eea;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.result-item.success {
    border-left-color: #10b981;
}

.result-item.warning {
    border-left-color: #f59e0b;
}

.result-item.error {
    border-left-color: #ef4444;
}

.result-item h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.result-item p {
    color: #666;
    line-height: 1.6;
}

.result-summary {
    background: white;
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 20px;
    text-align: center;
    font-size: 1.3rem;
    font-weight: 600;
}

.result-summary.pass {
    color: #10b981;
    border: 3px solid #10b981;
}

.result-summary.fail {
    color: #ef4444;
    border: 3px solid #ef4444;
}

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

.info-section h2 {
    color: #667eea;
    margin-bottom: 25px;
    text-align: center;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.info-card {
    background: #f8f9ff;
    padding: 25px;
    border-radius: 15px;
    border-top: 4px solid #667eea;
    transition: all 0.3s ease;
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.2);
}

.info-card h3 {
    color: #667eea;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.info-card p {
    color: #666;
    line-height: 1.8;
}

footer {
    background: #f8f9ff;
    padding: 20px;
    text-align: center;
    color: #666;
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 10px;
}

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

.barcode-details {
    background: #f0f2ff;
    padding: 15px;
    border-radius: 8px;
    margin-top: 10px;
    font-family: 'Courier New', monospace;
}

.barcode-details strong {
    color: #667eea;
}

.metric-value {
    display: inline-block;
    background: #667eea;
    color: white;
    padding: 3px 10px;
    border-radius: 5px;
    font-weight: 600;
    margin: 0 5px;
}

.notification-toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    padding: 15px 25px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    font-weight: 600;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    z-index: 10000;
    max-width: 400px;
    word-wrap: break-word;
}

.notification-toast.show {
    transform: translateX(0);
}

.notification-success {
    border-left: 5px solid #10b981;
    color: #10b981;
}

.notification-error {
    border-left: 5px solid #ef4444;
    color: #ef4444;
}

.notification-info {
    border-left: 5px solid #667eea;
    color: #667eea;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    main {
        padding: 20px;
    }

    .upload-area {
        padding: 40px 20px;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }

    .notification-toast {
        right: 10px;
        left: 10px;
        max-width: none;
    }
}