@property --fs{syntax:'<length>';inherits:true;initial-value:16px}
@property --fit{syntax:'<number>';inherits:true;initial-value:1}
@property --seg-p{syntax:'<number>';inherits:false;initial-value:0}

/* Frame of every presentation deck. Layout: one screen without scrolling. Status bar / slide (text left, SVG stage right;
   stacked below a 6:5 aspect ratio) / progress rail. The deck stylesheet that follows sets the colour tokens (--bg, --text,
   --acc, --g1…--g5 …), the motif of the frame and the slides. */
:root{
  --font-body:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"Cascadia Mono",Consolas,monospace;
  color-scheme:dark;
}
:root[data-theme="light"]{color-scheme:only light}

:root{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
html{height:100%;box-sizing:border-box;-webkit-text-size-adjust:100%;text-size-adjust:100%}
*,*::before,*::after{box-sizing:inherit}
[hidden]{display:none!important}
body{height:100%;margin:0;overflow:hidden;background:var(--bg);color:var(--text);font:400 16px/1.5 var(--font-body);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-optical-sizing:auto;-webkit-tap-highlight-color:transparent}
button{font:inherit;color:inherit}
a{color:var(--acc);text-underline-offset:.18em}
:focus-visible{outline:2px solid var(--acc);outline-offset:3px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.defs{position:absolute;width:0;height:0;overflow:hidden}
.defs .s1{stop-color:var(--g1)}.defs .s2{stop-color:var(--g2)}.defs .s3{stop-color:var(--g3)}.defs .s4{stop-color:var(--g4)}.defs .s5{stop-color:var(--g5)}


/* ---------- background: lattice (a repeating tile from the deck, no masks) and a glow canvas clipped by it ---------- */
.bg{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.bg>*{position:absolute;inset:0;width:100%;height:100%}
.bg-glow{background:radial-gradient(70vmax 46vmax at 88% -10%,var(--glow-1),transparent 62%),radial-gradient(56vmax 40vmax at -12% 4%,var(--glow-2),transparent 58%),radial-gradient(64vmax 44vmax at 50% 115%,var(--glow-3),transparent 62%)}
.bg-lattice{background-image:var(--tile);background-size:var(--tw) var(--th);background-repeat:repeat;background-position:0 0}
:root:not(.tiled) .bg-lattice{display:none}
#fx{display:none}
:root.tiled:is([data-fx="high"],[data-fx="mid"]) #fx{display:block}
.bg-vig{background:radial-gradient(ellipse 92% 86% at 58% 46%,transparent 34%,var(--vignette) 100%)}

/* ---------- app ---------- */
.app{position:relative;z-index:1;height:100%;overflow:clip;display:grid;grid-template-rows:auto minmax(0,1fr) auto;container:app/size;padding-left:max(clamp(16px,3.6vw,128px),env(safe-area-inset-left,0px));padding-right:max(clamp(16px,3.6vw,128px),env(safe-area-inset-right,0px))}
.app>*{--fs:clamp(12.5px,min(calc(100cqw / 70),calc(100cqh / 38)),56px);width:100%;max-width:calc(var(--fs) * 92);justify-self:center;min-width:0}
@container app (aspect-ratio < 1.2){.app>*{--fs:clamp(12.5px,min(calc(100cqw / 24),calc(100cqh / 55)),44px)}}

.bar{display:flex;align-items:center;gap:max(8px,.6em);padding-block:max(8px,.7em) max(4px,.3em);font-size:max(11.5px,calc(var(--fs) * .8))}
/* breadcrumb: the Cryptospecting logo leads home, the title leads to the deck's section */
.crumbs{display:flex;align-items:center;gap:.55em;margin-right:auto;min-width:0;white-space:nowrap}
.brand{display:inline-flex;align-items:center;justify-content:center;flex:none;min-width:40px;min-height:40px;margin-left:-.3em;border-radius:.7em;color:var(--text);text-decoration:none;font-size:1.14em}
.mark{width:2em;height:2em;flex:none;transition:transform .25s}
.brand:hover .mark{transform:rotate(-8deg) scale(1.06)}
:root[data-theme="light"] .mark stop:nth-child(1){stop-color:#F5A800}
:root[data-theme="light"] .mark stop:nth-child(2){stop-color:#FF9419}
:root[data-theme="light"] .mark stop:nth-child(3){stop-color:#FF6F35}
:root[data-theme="light"] .mark stop:nth-child(4){stop-color:#F04784}
:root[data-theme="light"] .mark stop:nth-child(5){stop-color:#C93FD6}
:root[data-theme="light"] .mark path:nth-of-type(2){fill:#FFCD38}
:root[data-theme="light"] .mark path:nth-of-type(3){fill:#FBB812}
:root[data-theme="light"] .mark path:nth-of-type(4){fill:#EE9414}
:root[data-theme="light"] .mark path:nth-of-type(5){fill:#F5A80C}
:root[data-theme="light"] .mark path:nth-of-type(6){fill:#EC861A}
:root[data-theme="light"] .mark path:nth-of-type(7){fill:#DF632C}
.crumb-sep{width:1px;height:1.3em;flex:none;background:var(--border-strong);transform:skewX(-16deg)}
.crumb{display:inline-flex;align-items:baseline;gap:.35em;min-width:0;padding-block:.35em;color:var(--text);text-decoration:none;font-weight:850;font-size:1.02em;letter-spacing:-.01em}
.crumb small{font-weight:500;font-size:.86em;color:var(--muted);letter-spacing:0}
:is(.brand,.crumb):hover{color:var(--acc)}
:is(.brand,.crumb):hover small{color:inherit}
.pill{display:inline-flex;align-items:center;gap:.5em;padding:.4em .8em;border:1px solid var(--border);border-radius:99px;background:color-mix(in srgb,var(--surface) 70%,transparent);font:500 .86em/1.2 var(--font-mono);color:var(--muted);white-space:nowrap;font-variant-numeric:tabular-nums}
.pill b{color:var(--acc);font-weight:600}
.beacon{width:.5em;height:.5em;border-radius:50%;background:var(--mint);flex:none}
:is([data-fx="high"],[data-fx="mid"]) .beacon{animation:beacon 2.4s ease-out infinite}
@keyframes beacon{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--mint) 70%,transparent)}70%,100%{box-shadow:0 0 0 .55em transparent}}
.chip{display:inline-flex;align-items:center;gap:.4em;min-height:36px;padding:.45em .85em;border:1px solid var(--border);border-radius:99px;background:color-mix(in srgb,var(--surface) 70%,transparent);font:500 .86em/1 var(--font-mono);color:var(--muted);cursor:pointer;white-space:nowrap}
.chip:hover{color:var(--text);border-color:var(--border-strong)}
.chip b{color:var(--acc);font-weight:600}
.chip svg{width:1.1em;height:1.1em;flex:none;fill:currentColor}
#shareBtn svg{fill:var(--acc)}
@container app (width < 380px){.fxt{display:none}}
@container app (width < 640px){.crumb small,.fxl,.src-l,.share-l,.pill .lbl{display:none}.chip{padding-inline:.7em}}

.main{position:relative;display:grid;min-height:0;touch-action:pan-y pinch-zoom}
.scene{grid-area:1/1;min-height:0;min-width:0;display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);grid-template-rows:minmax(0,1fr);gap:calc(var(--fs) * 2.4);align-items:center;padding-block:calc(var(--fs) * .4)}
@container app (aspect-ratio < 1.2){
  .scene{grid-template-columns:minmax(0,1fr);grid-template-rows:fit-content(60%) minmax(0,1fr);gap:calc(var(--fs) * .8);align-items:stretch}
  .scene.tight{grid-template-rows:fit-content(50%) minmax(0,1fr)}
}
.copy{position:relative;display:flex;flex-direction:column;justify-content:center;gap:.8em;min-height:0;max-height:100%;overflow:hidden;font-size:calc(var(--fs) * var(--fit));padding-block:.25em}
@container app (aspect-ratio < 1.2){.copy{justify-content:flex-start;gap:.62em}}
/* stage column: the drawing, its caption and any controls form one centred group; the drawing gives way first */
.visual{position:relative;isolation:isolate;min-height:0;min-width:0;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:calc(var(--fs) * .7)}
.visual::before{content:"";position:absolute;inset:-4% -6%;z-index:-1;pointer-events:none;background:radial-gradient(closest-side,color-mix(in srgb,var(--bg) 78%,transparent) 30%,color-mix(in srgb,var(--bg) 40%,transparent) 70%,transparent)}
.v{display:block;flex:0 1 auto;width:100%;height:auto;min-height:0;overflow:visible}
/* landscape: SVG labels stay close to body text size and the stage does not grow without limit */
@container app (aspect-ratio >= 1.2){.v{max-width:calc(var(--fs) * 38);max-height:calc(var(--fs) * 30)}.has-ctl .v{max-height:calc(var(--fs) * 24)}}
@container app (aspect-ratio < 1.2){.visual{gap:calc(var(--fs) * .55)}}

/* caption under the stage: one step of the animation at a time, the whole list for screen readers */
.beats{position:relative;flex:none;width:min(100%,34em);margin-top:.35em;padding:.62em .9em .62em .62em;border:1px solid var(--border);border-radius:.9em;background:color-mix(in srgb,var(--surface) 86%,transparent);box-shadow:0 .8em 2em -1.4em var(--scrim);font-size:max(13px,calc(var(--fs) * .9))}
.beats ol{display:grid;margin:0;padding:0;list-style:none;counter-reset:beat}
.beats li{grid-area:1/1;display:flex;align-items:flex-start;gap:.65em;min-width:0;line-height:1.42;color:color-mix(in oklab,var(--text) 92%,var(--muted));text-wrap:pretty;opacity:0;pointer-events:none;counter-increment:beat}
.beats li:first-child,.beats li.on{pointer-events:auto}
.beats li:first-child{opacity:1}
.beats li::before{content:counter(beat);flex:none;display:grid;place-items:center;width:2.2em;height:2.2em;margin-top:-.05em;border-radius:50%;background:linear-gradient(140deg,var(--g1),var(--g3) 55%,var(--g4));color:var(--on-acc);font:800 .76em/1 var(--font-mono)}
.bdots{position:absolute;top:0;right:1em;display:flex;gap:.2em;padding:0 .3em;transform:translateY(-50%);border-radius:99px;background:var(--bg)}
.bdots button{position:relative;width:1.1em;height:1.1em;padding:0;border:0;background:none;cursor:pointer}
.bdots button::before{content:"";position:absolute;inset:.3em;border-radius:50%;background:var(--border-strong);transition:background .2s}
.bdots button:hover::before{background:var(--faint)}
.bdots .done::before{background:color-mix(in srgb,var(--acc) 50%,var(--border-strong))}
.bdots .cur::before{inset:.22em;background:var(--acc);box-shadow:0 0 .5em color-mix(in srgb,var(--acc) 60%,transparent)}
.bprog{position:absolute;left:.9em;right:.9em;bottom:-1px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--g1),var(--g3),var(--g4));transform-origin:left center;transform:scaleX(0);pointer-events:none}
@container app (height < 430px){.beats{margin-top:0;padding-block:.4em;font-size:12px}.bdots{display:none}}

.kicker{margin:0;font:600 .7em/1.3 var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--acc)}
.kicker span{color:var(--faint);letter-spacing:0}
.title{margin:0;font-weight:900;font-size:2.5em;line-height:1.04;letter-spacing:-.035em;text-wrap:balance;padding-bottom:.05em;
  background:linear-gradient(105deg,var(--text) 0%,var(--text) 34%,var(--g1) 52%,var(--g3) 68%,var(--g4) 84%,var(--g5) 100%);-webkit-background-clip:text;background-clip:text;color:transparent;-webkit-text-fill-color:transparent}
@container app (aspect-ratio < 1.2){.title{font-size:2.15em}}
[lang="en"] :is(.lede,.pts li,.note){hyphens:manual}
.lede{margin:0;max-width:44ch;font-size:1.05em;line-height:1.5;color:color-mix(in oklab,var(--text) 86%,var(--muted));text-wrap:pretty;hyphens:auto}
.lede b,.pts b{color:var(--text);font-weight:700}
.code{align-self:flex-start;max-width:100%;margin:0;padding:.34em .62em;border:1px solid var(--border-strong);border-radius:.55em;background:var(--surface-2);font:500 .78em/1.4 var(--font-mono);color:var(--acc-soft);overflow-wrap:anywhere}
.formula{margin:0;max-width:30em;padding:.7em .9em;border:1px solid var(--border-strong);border-radius:.8em;background:color-mix(in srgb,var(--surface) 82%,transparent);font:500 .88em/1.5 var(--font-mono);color:var(--text)}
.formula i{font-style:normal;color:var(--acc)}
.formula em{font-style:normal;color:var(--rose)}
.note{position:relative;margin:0;max-width:46ch;padding:.62em .9em .62em 1.2em;border:1px solid var(--border);border-radius:.8em;background:color-mix(in srgb,var(--surface) 72%,transparent);font-size:.84em;line-height:1.5;color:var(--muted);text-wrap:pretty;hyphens:auto}
.note::before{content:"";position:absolute;left:.48em;top:.62em;bottom:.62em;width:3px;border-radius:3px;background:linear-gradient(var(--g2),var(--g3),var(--g4))}
.note a{color:var(--acc-soft)}
.pts{list-style:none;margin:0;padding:0;display:grid;gap:.5em;max-width:46ch}
.pts li{position:relative;padding-left:1.4em;line-height:1.45;text-wrap:pretty;hyphens:auto;color:color-mix(in oklab,var(--text) 86%,var(--muted))}
.pts li.c-mint{--c:var(--mint)}.pts li.c-gold{--c:var(--gold)}.pts li.c-rose{--c:var(--rose)}.pts li.c-red{--c:var(--red)}.pts li.c-cyan{--c:var(--cyan)}
.pts li::before{content:"";position:absolute;left:.08em;top:.42em;width:.66em;height:.66em;border-radius:50%;background:var(--c,var(--acc));box-shadow:0 0 .6em color-mix(in srgb,var(--c,var(--acc)) 45%,transparent)}
.term{margin:0;max-width:30em;padding:.7em 1em;border:1px solid var(--border-strong);border-radius:.9em;background:color-mix(in srgb,var(--surface) 80%,transparent);font:400 .78em/1.6 var(--font-mono)}
.term-h{margin:0 0 .3em;color:var(--muted)}
.term-h span{color:var(--acc)}
.term dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:0 1.3em}
.term dt{color:var(--faint)}
.term dd{margin:0;color:var(--text)}
@container app (height < 560px){.opt{display:none}}
@container app (aspect-ratio < 1.2) and (height < 880px){.opt{display:none}}
/* small phones upright: title, text, animation and its caption; the code line and side notes give way */
@container app (aspect-ratio < 1.2) and (height < 700px){.copy :is(.note,.code,.formula,.opt-s){display:none}}
@container app (aspect-ratio < 1.2) and (height < 620px){.has-ctl .beats{margin-top:0;padding-block:.35em;font-size:12px}.has-ctl .bdots{display:none}}
/* very short upright screens: the text gets a capped share and scrolls, so the animation keeps its room */
@container app (aspect-ratio < 1.2) and (height < 640px){
  .scene{grid-template-rows:fit-content(46%) minmax(0,1fr)}
  .scene.tight{grid-template-rows:fit-content(37%) minmax(0,1fr)}
  .copy{--fit-min:.9}
}
.copy.more{overflow-y:auto;overscroll-behavior:contain;padding-bottom:2.6em;-webkit-mask-image:linear-gradient(to bottom,#000 calc(100% - 2.4em),transparent);mask-image:linear-gradient(to bottom,#000 calc(100% - 2.4em),transparent)}

/* the entrance choreography is computed in JS from the time t; there are no CSS transitions inside a frame */

/* controls inside slides */
.ctl{flex:none;display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:.3em 1em;width:min(100%,34em);padding:.65em 1em;border:1px solid var(--border);border-radius:1em;background:color-mix(in srgb,var(--surface) 82%,transparent);font-size:max(12px,calc(var(--fs) * .8))}
.ctl label{font:500 .92em/1.2 var(--font-mono);color:var(--muted);white-space:nowrap}
.ctl output{display:inline-block;min-width:9.5ch;margin-left:.4em;color:var(--text);font-weight:600;font-variant-numeric:tabular-nums}
.res{grid-column:1/-1;margin:.2em 0 0;display:flex;flex-wrap:wrap;gap:.2em 1.2em;font:500 .9em/1.4 var(--font-mono);color:var(--muted)}
.res b{color:var(--acc);font-weight:600;font-variant-numeric:tabular-nums}
.res .mul b{color:var(--text)}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:max(30px,1.9em);margin:0;background:transparent;cursor:pointer;--v:50%;touch-action:pan-y}
input[type=range]::-webkit-slider-runnable-track{height:6px;border-radius:9px;background:linear-gradient(90deg,var(--g2),var(--g4)) 0/var(--v) 100% no-repeat,var(--border-strong)}
input[type=range]::-moz-range-track{height:6px;border-radius:9px;background:linear-gradient(90deg,var(--g2),var(--g4)) 0/var(--v) 100% no-repeat,var(--border-strong)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:22px;height:22px;margin-top:-8px;border-radius:50%;background:var(--acc);border:4px solid var(--bg);box-shadow:0 0 0 1.5px var(--acc),0 0 16px color-mix(in srgb,var(--acc) 55%,transparent)}
input[type=range]::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--acc);border:4px solid var(--bg);box-shadow:0 0 0 1.5px var(--acc),0 0 16px color-mix(in srgb,var(--acc) 55%,transparent)}
input[type=range]:focus-visible{outline:2px solid var(--acc);outline-offset:3px;border-radius:8px}

/* progress rail */
.rail{display:grid;grid-template-columns:auto auto auto auto auto minmax(0,1fr) auto auto;grid-template-areas:"prev play next rep spd segs count fs";align-items:center;gap:max(8px,.55em);padding-block:max(6px,.45em) max(10px,.8em);font-size:max(11.5px,calc(var(--fs) * .8))}
@container app (width < 600px){.rail{grid-template-columns:auto auto auto auto auto minmax(0,1fr) auto auto;grid-template-areas:"segs segs segs segs segs segs segs segs" "prev play next rep spd . count fs";row-gap:0}}
@container app (width < 360px){.count{display:none}.rail{column-gap:6px;grid-template-columns:auto auto auto auto auto minmax(0,1fr) auto;grid-template-areas:"segs segs segs segs segs segs segs" "prev play next rep spd . fs"}}
#prev{grid-area:prev}#play{grid-area:play}#next{grid-area:next}#rep{grid-area:rep}#spd{grid-area:spd}.segs{grid-area:segs}.count{grid-area:count}#fs{grid-area:fs}
/* a deck with sound has one more button, next to full screen; under 360 px the buttons get a little smaller to fit */
.rail.has-snd{grid-template-columns:auto auto auto auto auto minmax(0,1fr) auto auto auto;grid-template-areas:"prev play next rep spd segs count snd fs"}
@container app (width < 600px){.rail.has-snd{grid-template-areas:"segs segs segs segs segs segs segs segs segs" "prev play next rep spd . count snd fs"}}
@container app (width < 420px){.has-snd .count{display:none}.rail.has-snd{grid-template-columns:auto auto auto auto auto minmax(0,1fr) auto auto;grid-template-areas:"segs segs segs segs segs segs segs segs" "prev play next rep spd . snd fs"}}
@container app (width < 360px){.rail.has-snd{column-gap:5px;grid-template-columns:auto auto auto auto auto minmax(0,1fr) auto auto;grid-template-areas:"segs segs segs segs segs segs segs segs" "prev play next rep spd . snd fs"}.has-snd .ibtn{inline-size:35px;block-size:35px}}
#snd{grid-area:snd}
#snd .i-on,#snd[aria-pressed="true"] .i-off{display:none}
#snd[aria-pressed="true"] .i-on{display:block}
.ibtn{display:grid;place-items:center;inline-size:max(40px,2.7em);block-size:max(40px,2.7em);padding:0;border:1px solid var(--border-strong);border-radius:.85em;background:color-mix(in srgb,var(--surface) 80%,transparent);color:var(--text);cursor:pointer;transition:border-color .2s,transform .2s}
.ibtn:hover{border-color:var(--acc)}
.ibtn:active{transform:scale(.94)}
.ibtn svg{width:46%;height:46%;fill:currentColor}
.ibtn.primary{border-color:transparent;background:linear-gradient(120deg,var(--btn-a),var(--btn-b) 50%,var(--btn-c));color:var(--on-acc)}
.ibtn .i-play,.ibtn.paused .i-pause{display:none}
.ibtn.paused .i-play{display:block}
.is-fs #fs .i-fs-on,#fs .i-fs-off{display:none}
.is-fs #fs .i-fs-off{display:block}
.segs{display:flex;gap:max(3px,.3em);min-width:0}
.seg{position:relative;flex:1;min-width:0;height:max(26px,1.9em);padding:0;border:0;background:none;cursor:pointer}
.seg::before,.seg i{content:"";position:absolute;left:0;right:0;top:50%;height:max(3px,.26em);margin-top:calc(max(3px,.26em) / -2);border-radius:99px}
.seg::before{background:var(--border-strong);transition:background .2s}
.seg:hover::before{background:var(--faint)}
.seg i{background:linear-gradient(90deg,var(--g1),var(--g3),var(--g4));transform-origin:left center;transform:scaleX(var(--seg-p))}
.seg[aria-current] i{box-shadow:0 0 10px color-mix(in srgb,var(--g3) 50%,transparent)}
/* chapter names under the segments where there is room for them */
.seg .sl{display:none}
@container app (width >= 1000px) and (height >= 600px){
  .seg{height:max(40px,2.75em)}
  .seg::before,.seg i{top:.75em}
  .seg .sl{display:block;position:absolute;left:.1em;right:0;bottom:.15em;overflow:hidden;font:500 .74em/1.2 var(--font-mono);color:var(--faint);text-align:left;white-space:nowrap;text-overflow:ellipsis;transition:color .2s}
  .seg:hover .sl{color:var(--text)}
  .seg.done .sl{color:var(--muted)}
  .seg[aria-current] .sl{color:var(--acc);font-weight:600}
}
.count{min-width:7ch;text-align:center;font:500 .9em/1 var(--font-mono);color:var(--muted);font-variant-numeric:tabular-nums}
.count b{color:var(--text);font-weight:600}

/* sources */
.pop{display:none}
.pop:popover-open{display:block}
.pop{max-width:min(36rem,calc(100vw - 32px));max-height:min(86vh,44rem);margin:auto;padding:1.2em 1.4em 1.3em;overflow:auto;border:1px solid var(--border-strong);border-radius:1.2em;background:var(--surface);color:var(--text);font-size:clamp(14px,.85vmin + 8px,24px);line-height:1.5;box-shadow:0 1.5rem 4rem -1rem var(--scrim)}
.pop::backdrop{background:var(--scrim)}
.pop-h{display:flex;align-items:center;justify-content:space-between;gap:1em;margin-bottom:.4em}
.pop h3{margin:1em 0 .3em;font-size:.95em;font-weight:800}
.pop p{margin:0;color:var(--muted);font-size:.92em}
.pop .ibtn{inline-size:40px;block-size:40px}
.src{margin:.3em 0 0;padding:0;list-style:none;display:grid;gap:.45em}
.src li{display:grid;gap:.05em;font-size:.92em}
.src span{color:var(--muted);font-size:.92em}
.src a{font-family:var(--font-mono);font-size:.92em;color:var(--acc-soft);overflow-wrap:anywhere}
.pop .disc{margin-top:1em;padding-top:.8em;border-top:1px solid var(--border);color:var(--faint)}

/* ---------- SVG stage ---------- */
.v text{font-family:var(--font-body);fill:var(--text);font-variant-numeric:tabular-nums}
.v .m{font-family:var(--font-mono);font-size:15.5px;fill:var(--muted)}
.v .ms{font-family:var(--font-mono);font-size:14.5px;fill:var(--faint)}
.v .mu{font-family:var(--font-mono);font-size:13.5px;font-weight:600;letter-spacing:.14em;fill:var(--faint)}
.v .b{font-weight:800;font-size:17px}
.v .bl{font-weight:850;font-size:24px;letter-spacing:-.02em}
.v .big{font-weight:900;font-size:56px;letter-spacing:-.04em;fill:url(#gU)}
.v .gt{fill:url(#gU)}
.v .c-gold{fill:var(--gold)}.v .c-rose{fill:var(--rose)}.v .c-mint{fill:var(--mint)}.v .c-faint{fill:var(--faint)}.v .c-cyan{fill:var(--cyan)}.v .c-muted{fill:var(--muted)}
.v .card{fill:var(--glass);stroke:var(--border-strong);stroke-width:1.2}
.v .fade{opacity:0}
.v .pp{transform-box:fill-box;transform-origin:center}
[data-fx="high"] .v .glow{filter:url(#glow)}
.v .callout{fill:none;stroke:var(--faint);stroke-width:1;stroke-dasharray:3 4}
.v .grid{stroke:var(--border);stroke-width:1}
.v .axis{stroke:var(--border-strong);stroke-width:1.4}

/* level "off": nothing moves, slides show their final state */
[data-fx="off"] *,[data-fx="off"] *::before,[data-fx="off"] *::after{animation:none!important;transition:none!important}
/* repeat: the current slide plays again and again until it is switched off */
#rep[aria-pressed="true"],#spd[aria-pressed="true"],#snd[aria-pressed="true"]{border-color:var(--acc);color:var(--acc);background:color-mix(in srgb,var(--acc) 14%,var(--surface))}
/* speed: the button shows the current speed and slows playback down step by step */
#spd{font:700 .8em/1 var(--font-mono);letter-spacing:-.03em;white-space:nowrap}
/* scrubbing: the progress rail is a handle */
.rail{position:relative}
.segs{touch-action:none;cursor:ew-resize}
.tip{position:absolute;bottom:calc(100% - .2em);left:0;z-index:5;display:grid;gap:.1em;max-width:min(26em,100%);padding:.45em .7em;border:1px solid var(--border-strong);border-radius:.7em;background:var(--surface);box-shadow:0 .6em 1.6em -.6em var(--scrim);pointer-events:none;font-size:.92em;white-space:nowrap}
.tip b{font-weight:700;color:var(--text);overflow:hidden;text-overflow:ellipsis}
.tip span{font:500 .9em/1.2 var(--font-mono);color:var(--acc);font-variant-numeric:tabular-nums}
.speed{display:flex;flex-wrap:wrap;gap:.4em;margin-top:.4em}
.spd{min-width:4.2em;min-height:40px;padding:.4em .7em;border:1px solid var(--border-strong);border-radius:99px;background:none;font:500 .9em/1 var(--font-mono);color:var(--muted);cursor:pointer}
.spd:hover{color:var(--text);border-color:var(--acc)}
.spd[aria-pressed="true"]{border-color:transparent;background:linear-gradient(120deg,var(--btn-a),var(--btn-b) 50%,var(--btn-c));color:var(--on-acc)}
/* share: short notice above the progress rail */
.toast{position:absolute;left:50%;bottom:calc(100% + .4em);z-index:6;width:max-content;max-width:min(34em,100%);margin:0;padding:.55em .95em;border:1px solid var(--border-strong);border-radius:.8em;background:var(--surface);box-shadow:0 .6em 1.6em -.6em var(--scrim);color:var(--text);font:500 max(13px,.92em)/1.4 var(--font-body);text-align:center;overflow-wrap:anywhere;user-select:text;opacity:0;transform:translate(-50%,.5em);transition:opacity .2s,transform .2s}
.toast.on{opacity:1;transform:translate(-50%,0)}