57 lines
2.1 KiB
TypeScript
57 lines
2.1 KiB
TypeScript
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import { keyframes } from '@vanilla-extract/css';
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/**
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* Snowfall — a flake drifts downward while swaying horizontally and slowly
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* rotating. GPU-only: animates transform + opacity exclusively. The vertical
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* travel uses a tall translateY so a single keyframe set serves all flakes;
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* per-flake duration/delay/scale create the parallax variety.
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*/
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export const animSnowFall = keyframes({
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'0%': { transform: 'translate3d(0, -8vh, 0) rotate(0deg)', opacity: '0' },
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'8%': { opacity: '1' },
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'50%': { transform: 'translate3d(14px, 50vh, 0) rotate(180deg)' },
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'92%': { opacity: '0.85' },
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'100%': { transform: 'translate3d(-10px, 112vh, 0) rotate(360deg)', opacity: '0' },
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});
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/**
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* Gentle lateral sway applied to a flake's wrapper so the drift reads as wind,
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* decoupled from the fall so the two combine into an organic path.
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*/
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export const animSnowSway = keyframes({
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'0%': { transform: 'translate3d(0, 0, 0)' },
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'50%': { transform: 'translate3d(18px, 0, 0)' },
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'100%': { transform: 'translate3d(0, 0, 0)' },
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});
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/**
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* String-light breathing — bokeh orbs softly pulse in brightness and scale,
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* like incandescent bulbs warming and cooling. Opacity + transform only.
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*/
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export const animBulbBreathe = keyframes({
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'0%': { transform: 'scale(0.92)', opacity: '0.55' },
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'50%': { transform: 'scale(1.08)', opacity: '0.95' },
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'100%': { transform: 'scale(0.92)', opacity: '0.55' },
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});
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/**
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* Aurora shimmer — a wide soft band high in the scene slowly slides and
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* breathes. Uses translateX + opacity (never background-position) so it stays
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* on the compositor.
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*/
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export const animAurora = keyframes({
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'0%': { transform: 'translate3d(-6%, 0, 0) scaleY(1)', opacity: '0.5' },
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'50%': { transform: 'translate3d(6%, 0, 0) scaleY(1.08)', opacity: '0.8' },
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'100%': { transform: 'translate3d(-6%, 0, 0) scaleY(1)', opacity: '0.5' },
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});
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/**
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* Vignette frost — a barely-there breathing of the cold frame so the static
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* tint feels alive without distracting motion.
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*/
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export const animFrostPulse = keyframes({
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'0%': { opacity: '0.85' },
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'50%': { opacity: '1' },
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'100%': { opacity: '0.85' },
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});
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