Custom Border Thickness

The button has a default border thickness of --o-border-size-2. You can change this value by using the --o_border-size custom property.

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Borderless button site wide

.o-btn {
  --o_border-size: 0;
}

Thick border modifier class

.o-btn-thick-border {
  --o_border-size: var(--o-border-size-4);
}