body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: #f0f0f0;
    margin: 0;
    padding: 10px;
    box-sizing: border-box;
}

h1 {
    margin: 20px 0;
    color: #333;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 1200px;
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 15px;
    padding: 10px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    align-items: center;
    justify-content: center;
}

.tool-btn {
    padding: 8px 12px;
    border: 2px solid #ddd;
    background-color: white;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s ease;
}

.tool-btn:hover {
    background-color: #f5f5f5;
}

.tool-btn.active {
    background-color: #007bff;
    color: white;
    border-color: #007bff;
}

#color-picker {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

#brush-size {
    width: 100px;
}

#clear-btn, #save-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.2s ease;
}

#clear-btn {
    background-color: #dc3545;
    color: white;
}

#clear-btn:hover {
    background-color: #c82333;
}

#save-btn {
    background-color: #28a745;
    color: white;
}

#save-btn:hover {
    background-color: #218838;
}

canvas {
    border: 2px solid #333;
    background-color: white;
    cursor: crosshair;
    border-radius: 5px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

@media (max-width: 768px) {
    .toolbar {
        flex-direction: column;
        gap: 15px;
    }
    
    .toolbar > div {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
    }
    
    h1 {
        font-size: 24px;
        margin: 10px 0;
    }
    
    body {
        padding: 5px;
    }
}