/* Flavor spin stage: a pinned colour stage that swaps N items as you scroll. The section's height is set by part.js
   (100svh + the timeline's length x data-fss-pace); the stage sticks for that whole range. Layout knobs below; timing
   knobs are data- attributes on the section (see part.js). */
.fss {
  --fss-bg: #d32929;                         /* first colour; part.js tweens it per swap from each slide's data-fss-color */
  --fss-ink: #f4efe9;                        /* text / pop colour */
  --fss-word-color: rgba(255, 255, 255, .55);/* the giant word sits pale, behind the object */
  --fss-word-size: 26vw;
  --fss-word-font: "Anton", "Bebas Neue", Impact, "Arial Narrow", sans-serif;
  --fss-object-w: 17vw;                      /* object width (the source's bag: 218px at 1280) */
  --fss-object-y: 2svh;                      /* object's offset below the centre */
  --fss-shadow-w: 18vw;                      /* ground shadow under the landed object */
  --fss-shadow-y: 24svh;                     /* shadow distance below the centre */
  --fss-text-bottom: 5svh;
  position: relative;
  height: 100svh;                            /* no JS: one screen showing the first slide */
}
.fss__stage {
  position: sticky; top: 0; height: 100svh; overflow: hidden;
  background: var(--fss-bg); color: var(--fss-ink);
  display: grid; isolation: isolate;
}
.fss__slide { grid-area: 1 / 1; position: relative; }
.fss:not(.fss--on) .fss__slide:not(:first-child) { visibility: hidden; }

/* the giant word: chars split by part.js, each in its own clipping mask */
.fss__word {
  position: absolute; left: 0; right: 0; top: 50%; translate: 0 -50%; margin: 0;
  font: 400 var(--fss-word-size)/.88 var(--fss-word-font); text-transform: uppercase; letter-spacing: -.01em;
  color: var(--fss-word-color); text-align: center; white-space: nowrap; z-index: 1;
}
.fss__m { display: inline-block; overflow: hidden; vertical-align: top; }
.fss__c { display: inline-block; will-change: transform; }

/* the thrown object */
.fss__object {
  position: absolute; left: 50%; top: 50%; width: var(--fss-object-w); z-index: 3;
  translate: -50% calc(-50% + var(--fss-object-y)); will-change: transform;
}
.fss__shadow {
  position: absolute; left: 50%; top: calc(50% + var(--fss-shadow-y)); width: var(--fss-shadow-w); aspect-ratio: 8 / 1;
  translate: -50% -50%; z-index: 2; pointer-events: none; opacity: .4;
  background: radial-gradient(closest-side, rgba(0, 0, 0, .9), rgba(0, 0, 0, 0)); filter: blur(4px);
}

/* the pops: a tag and a round badge per slide (any element with data-fss-pop) */
[data-fss-pop] { z-index: 4; will-change: transform, opacity; }
.fss__tag {
  position: absolute; left: 13%; top: 52%; rotate: -4deg; transform-origin: 50% 50%;
  padding: .45em .8em; background: var(--fss-ink); color: var(--fss-bg); font: 600 clamp(13px, 1.5vw, 22px)/1.1 ui-sans-serif, system-ui, sans-serif;
  text-transform: uppercase; letter-spacing: .08em; white-space: nowrap;
}
.fss__badge {
  position: absolute; left: calc(50% + var(--fss-object-w) * .55); top: 46%; width: clamp(84px, 9.5vw, 136px); aspect-ratio: 1;
  display: grid; place-items: center; border-radius: 50%; border: 2px solid var(--fss-ink); rotate: 12deg;
  color: var(--fss-ink); font: 600 clamp(12px, 1.2vw, 17px)/1.05 ui-sans-serif, system-ui, sans-serif; text-transform: uppercase;
  text-align: center; text-decoration: none; letter-spacing: .04em;
}

/* the description: split into masked lines by part.js */
.fss__text {
  position: absolute; left: 50%; bottom: var(--fss-text-bottom); translate: -50% 0; width: min(64ch, 86vw); margin: 0; z-index: 4;
  font: 500 clamp(14px, 1.45vw, 20px)/1.35 ui-sans-serif, system-ui, sans-serif; text-transform: uppercase; letter-spacing: .04em; text-align: center;
}
.fss__l { display: block; overflow: hidden; }
.fss__li { display: block; will-change: transform; }

@media (max-width: 767px) {
  .fss { --fss-object-w: 36vw; --fss-shadow-w: 40vw; --fss-shadow-y: 17svh; --fss-word-size: 27vw; --fss-text-bottom: 7svh; }
  .fss__tag { left: 5%; top: 33%; }
  .fss__badge { left: auto; right: 5%; top: 58%; }
}