.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.upload-section {
    text-align: center;
    margin-bottom: 20px;
    padding: 20px;
    border: 2px dashed #ccc;
    border-radius: 8px;
}

.upload-section h2 {
    margin-bottom: 15px;
    color: #333;
}

#pdf-upload {
    margin-right: 10px;
}

.toolbar {
    margin-bottom: 20px;
    padding: 10px;
    background-color: #f5f5f5;
    border-radius: 4px;
    display: flex;
    justify-content: center;
    gap: 10px;
}

.tool-btn {
    padding: 8px 16px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.tool-btn:hover {
    background-color: #45a049;
}

.tool-btn.active {
    background-color: #2E7D32;
}

.pdf-text-input {
    position: absolute;
    font-family: Arial, sans-serif;
    font-size: 16px;
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid #4CAF50;
    padding: 4px 8px;
    min-width: 120px;
    z-index: 1000;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.pdf-text-input:focus {
    outline: none;
    border-color: #4CAF50;
    box-shadow: 0 0 3px rgba(76, 175, 80, 0.5);
}

#pdf-viewer {
    border: 1px solid #ddd;
    min-height: 500px;
    background-color: #f9f9f9;
    padding: 20px;
    border-radius: 4px;
}

#pdf-container {
    margin: 0 auto;
}