• Changed loader sizes to be consistent with inputs by default
• Adjust default loader thickness
• Fixed active/hover states for dark buttons
• Increased default input heights slightly (2rem => 2.25rem, etc.)
• Increased bottom margins to 1.5rem from 1rem
• Decreased default focus ring widths from 3px to 2px so they're not so obnoxious
• Decreased button border width for a more subtle effect (2px => 1px)
• Added --focus-width variables for easier customization
• Added --component-speed variable for easier customization
• Added --component-box-shadow-inner|outer for easier customization
• Adjusted fieldset padding slightly