body {
    margin: 0;
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #fdfcfb, #e2d1c3);
    height: 100vh;
}

#appContainer {
    width: 700px;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    background-color: #fff;
    border-radius: 15px;
    overflow: hidden;
}

#toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: linear-gradient(90deg, #7f7fd5, #86a8e7, #91eae4);
    width: 100%;
    box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.2);
}

.toolItem {
    background-color: #fff;
    border: none;
    border-radius: 50%;
    padding: 10px;
    font-size: 18px;
    cursor: pointer;
    transition: transform 0.2s, background-color 0.2s;
    box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.1);
}

.toolItem:hover {
    transform: scale(1.1);
    background-color: #f0f0f0;
}

.toolItem:active {
    transform: scale(0.95);
}

.toolLabel {
    font-size: 14px;
    color: #fff;
    margin: 0 10px;
}

#canvasContainer {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background-color: #f9f9f9;
    border-top: 2px solid #ddd;
    width: 100%;
}

#drawingCanvas {
    border: 2px solid #ddd;
    border-radius: 10px;
    background: #fff;
    width: 600px;
    height: 400px;
    box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.1);
}