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<!doctype html> <style> label { padding: 2px 4px; display: flex; flex-flow: column; background: #ddd; overflow: hidden; min-height: 0; min-width: 0; width: 80px; } input { flex: 1 1 auto; margin: 4px; min-height: 0; min-width: 0; -moz-appearance: textfield; } </style> <label> <input type="number"> </label>