Class	Behavior
rounded-sm	Slightly rounded corners (4px)
rounded	Normal rounded corners (10px)
rounded-lg	Highly rounded corners for large boxes (16px)
fully-rounded	Turns elements into circles or pill shapes
border-thin	Adds a thin 1px outline border
border-thick	Adds a thick 2px outline border

Class	Behavior
surface-panel	Main background panel for widgets and layouts
surface-card	Inner card background to group items inside a panel
floating-overlay	Floating box with shadow for menus and notifications

Class	Behavior
btn	Standard clickable button style
btn-primary	Colored button used for main actions
btn-destructive	Red button used for delete or exit actions
list-row-interactive	Clickable menu row that lights up when hovered or pressed

Class	Behavior
text-header	Large, bright text used for titles
text-muted	Small, faded text used for secondary info
badge	Small tag or label with a dark background pill shape
badge-success	Green status label indicating success or active states

Class	Behavior
progress-bar-fill	The filled portion of a progress tracker or battery level bar
slider-trough	The empty background track of volume/brightness sliders

Class	Behavior
switch-track-active	Background track of a toggle switch when flipped to ON
list-row-selected	Highlighted background state for currently active menu choices or active workspaces

Class	Behavior
separator-h	A thin horizontal divider line to break up content inside modules
separator-v	A thin vertical divider line to separate side-by-side items

Class	Behavior
card-header	Top border highlight frame tailored for system graphs or hardware monitors
input-field	Styling for custom user input boxes or terminal command runners

Class	Behavior
alert-banner	High-visibility danger strip for critically low battery or lost internet
text-warning	Yellow-tinted typography scale for low urgency battery or update alerts

Class	Behavior
ease-in-out	Easing transition that starts slow, accelerates, then slows down at the end
ease-out	Easing transition that snaps instantly and slows to a smooth halt
ease-in	Easing transition that starts slow and hits full speed dramatically at the finish
fade-in	Smoothly fades an invisible element to completely visible
fade-out	Smoothly fades an element to completely translucent
scale-in	Pops a widget up into view by blowing it up from a smaller size scale
scale-out	Shrinks a widget down until it collapses out of the presentation layer
slide-up	Glides a hidden bottom module upwards into its active resting placement
slide-down	Glides an active top module downwards into its active resting placement
pulse-glow	Continuous breathing light effect tailored for indicators or low battery warnings
duration-fast	Fast 150ms playback
duration-normal	Standard 300ms playback
duration-slow	Slow 500ms playback
delay-none	Executes the animation immediately
delay-short	Postpones the animation start by 100ms
delay-long	Postpones the animation start by 300ms
loop-infinite	Forces the keyframe loop to repeat forever
loop-once	Restricts execution to run exactly once through the timeline sequence
freeze-frame	Directs GTK to hold the visual elements on the very last keyframe when complete
reset-frame	Instantly snaps elements back to their initial un-animated look once finished