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/*
* TextReveal — mask-position wipe animation
*
* Instead of sliding text through a fixed mask (odometer style),
* the mask itself sweeps across each span to reveal/hide text.
*
* Direction: top-to-bottom. New text drops in from above, old text exits downward.
*
* Entering: gradient reveals top-to-bottom (top of text appears first).
* gradient(to bottom, white 33%, transparent 33%+edge)
* pos 0 100% = transparent covers element = hidden
* pos 0 0% = white covers element = visible
*
* Leaving: gradient hides top-to-bottom (top of text disappears first).
* gradient(to top, white 33%, transparent 33%+edge)
* pos 0 100% = white covers element = visible
* pos 0 0% = transparent covers element = hidden
*
* Both transition from 0 100% (swap) → 0 0% (settled).
*/
[data-component="text-reveal"] {
--_edge: var(--text-reveal-edge, 17%);
--_dur: var(--text-reveal-duration, 450ms);
--_spring: var(--text-reveal-spring, cubic-bezier(0.34, 1.08, 0.64, 1));
--_spring-soft: var(--text-reveal-spring-soft, cubic-bezier(0.34, 1, 0.64, 1));
--_travel: var(--text-reveal-travel, 0px);
display: inline-flex;
align-items: center;
min-width: 0;
overflow: visible;
[data-slot="text-reveal-track"] {
display: grid;
min-height: 20px;
line-height: 20px;
justify-items: start;
align-items: center;
overflow: visible;
transition: width var(--_dur) var(--_spring-soft);
}
[data-slot="text-reveal-entering"],
[data-slot="text-reveal-leaving"] {
grid-area: 1 / 1;
line-height: 20px;
white-space: nowrap;
justify-self: start;
text-align: start;
mask-size: 100% 300%;
-webkit-mask-size: 100% 300%;
mask-repeat: no-repeat;
-webkit-mask-repeat: no-repeat;
transition-duration: var(--_dur);
transition-timing-function: var(--_spring);
}
/* ── entering: reveal top-to-bottom ──
* Gradient(to top): white at bottom, transparent at top of mask.
* Settled pos 0 100% = white covers element = visible
* Swap pos 0 0% = transparent covers = hidden
* Slides from above: translateY(-travel) → translateY(0)
*/
[data-slot="text-reveal-entering"] {
mask-image: linear-gradient(to top, white 33%, transparent calc(33% + var(--_edge)));
-webkit-mask-image: linear-gradient(to top, white 33%, transparent calc(33% + var(--_edge)));
mask-position: 0 100%;
-webkit-mask-position: 0 100%;
transition-property:
mask-position,
-webkit-mask-position,
transform;
transform: translateY(0);
}
/* ── leaving: hide top-to-bottom + slide downward ──
* Gradient(to bottom): white at top, transparent at bottom of mask.
* Swap pos 0 0% = white covers element = visible
* Settled pos 0 100% = transparent covers = hidden
* Slides down: translateY(0) → translateY(travel)
*/
[data-slot="text-reveal-leaving"] {
mask-image: linear-gradient(to bottom, white 33%, transparent calc(33% + var(--_edge)));
-webkit-mask-image: linear-gradient(to bottom, white 33%, transparent calc(33% + var(--_edge)));
mask-position: 0 100%;
-webkit-mask-position: 0 100%;
transition-property:
mask-position,
-webkit-mask-position,
transform;
transform: translateY(var(--_travel));
}
/* ── swapping: instant reset ──
* Snap entering to hidden (above), leaving to visible (center).
*/
&[data-swapping="true"] [data-slot="text-reveal-entering"] {
mask-position: 0 0%;
-webkit-mask-position: 0 0%;
transform: translateY(calc(var(--_travel) * -1));
transition-duration: 0ms !important;
}
&[data-swapping="true"] [data-slot="text-reveal-leaving"] {
mask-position: 0 0%;
-webkit-mask-position: 0 0%;
transform: translateY(0);
transition-duration: 0ms !important;
}
/* ── not ready: kill all transitions ── */
&[data-ready="false"] [data-slot="text-reveal-track"] {
transition-duration: 0ms !important;
}
&[data-ready="false"] [data-slot="text-reveal-entering"],
&[data-ready="false"] [data-slot="text-reveal-leaving"] {
transition-duration: 0ms !important;
}
&[data-truncate="true"] {
width: 100%;
}
&[data-truncate="true"] [data-slot="text-reveal-track"] {
width: 100%;
min-width: 0;
overflow: hidden;
}
&[data-truncate="true"] [data-slot="text-reveal-entering"],
&[data-truncate="true"] [data-slot="text-reveal-leaving"] {
min-width: 0;
width: 100%;
overflow: hidden;
text-overflow: ellipsis;
}
}
@media (prefers-reduced-motion: reduce) {
[data-component="text-reveal"] [data-slot="text-reveal-track"] {
transition-duration: 0ms !important;
}
[data-component="text-reveal"] [data-slot="text-reveal-entering"],
[data-component="text-reveal"] [data-slot="text-reveal-leaving"] {
transition-duration: 0ms !important;
}
}
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