Segmented Stacked Bar

import matplotlib.pyplot as plt
import numpy as np

COLORS = {
    'segments': ['#6366F1', '#10B981', '#F59E0B', '#EF4444'],
    'background': '#FFFFFF',
    'text': '#1E293B',
    'text_muted': '#64748B',
}

categories = ['Product A', 'Product B', 'Product C']
segments = [
    [40, 25, 20, 15],
    [30, 30, 25, 15],
    [35, 20, 30, 15],
]
segment_labels = ['Q1', 'Q2', 'Q3', 'Q4']

y = np.arange(len(categories))

fig, ax = plt.subplots(figsize=(10, 4), dpi=100)
ax.set_facecolor(COLORS['background'])
fig.patch.set_facecolor(COLORS['background'])

for cat_idx, segs in enumerate(segments):
    left = 0
    for seg_idx, val in enumerate(segs):
        ax.barh(cat_idx, val, left=left, height=0.5, color=COLORS['segments'][seg_idx],
                alpha=0.85, edgecolor='white', linewidth=1.5,
                label=segment_labels[seg_idx] if cat_idx == 0 else None)
        if val > 10:
            ax.text(left + val/2, cat_idx, f'{val}%', ha='center', va='center',
                    fontsize=9, fontweight='bold', color='white')
        left += val

ax.spines['top'].set_visible(False)
ax.spines['right'].set_visible(False)
ax.spines['left'].set_visible(False)
ax.spines['bottom'].set_visible(False)

ax.tick_params(left=False, bottom=False, labelbottom=False)
ax.tick_params(axis='y', colors=COLORS['text'], labelsize=10, pad=10)
ax.set_yticks(y)
ax.set_yticklabels(categories)
ax.set_xlim(0, 100)

ax.legend(loc='upper center', bbox_to_anchor=(0.5, -0.15),
          ncol=4, frameon=False, fontsize=9, labelcolor=COLORS['text_muted'])

plt.tight_layout()
plt.show()