/* ============================================================
   08 — SHOWCASE
   The heavy graphics layer. Twenty-four named effects, each one
   self-contained and each one switchable off.

   Rules that hold for every effect in this file:
     · transform, opacity and filter only — never layout properties
     · no effect is load-bearing; delete this file and the site works
     · every animation stops under prefers-reduced-motion
     · anything expensive is downgraded below 900px

   Effects are numbered so a comment can point at one by name.
   ============================================================ */

/* ---------- 01. MESH : four-source animated gradient field ---- */
.mesh{
  position:absolute;inset:0;pointer-events:none;z-index:0;overflow:hidden;
  -webkit-mask-image:linear-gradient(180deg,#000 0%,#000 62%,transparent 100%);
  mask-image:linear-gradient(180deg,#000 0%,#000 62%,transparent 100%);
}
.mesh i{
  position:absolute;display:block;width:46vmax;height:46vmax;border-radius:50%;
  filter:blur(64px);mix-blend-mode:screen;opacity:.55;will-change:transform;
}
.mesh i:nth-child(1){background:radial-gradient(circle,rgba(46,107,255,.85),transparent 62%);
  top:-24vmax;left:-14vmax;animation:mesh1 24s ease-in-out infinite}
.mesh i:nth-child(2){background:radial-gradient(circle,rgba(155,107,255,.85),transparent 60%);
  top:-30vmax;left:22vmax;animation:mesh2 29s ease-in-out infinite}
.mesh i:nth-child(3){background:radial-gradient(circle,rgba(34,224,255,.8),transparent 62%);
  top:-18vmax;right:-16vmax;animation:mesh3 34s ease-in-out infinite}
.mesh i:nth-child(4){background:radial-gradient(circle,rgba(46,107,255,.4),transparent 64%);
  top:6vmax;left:38vmax;animation:mesh4 40s ease-in-out infinite}
/*  Translation only. A scale on a blurred layer re-rasterises the texture on
    every frame, which is the single most expensive thing this page can do.
    The drift reads the same; the cost does not. */
@keyframes mesh1{0%,100%{transform:translate3d(0,0,0)}33%{transform:translate3d(9vw,6vh,0)}66%{transform:translate3d(-5vw,10vh,0)}}
@keyframes mesh2{0%,100%{transform:translate3d(0,0,0)}50%{transform:translate3d(-10vw,8vh,0)}}
@keyframes mesh3{0%,100%{transform:translate3d(0,0,0)}40%{transform:translate3d(-8vw,5vh,0)}}
@keyframes mesh4{0%,100%{transform:translate3d(0,0,0)}50%{transform:translate3d(7vw,-5vh,0)}}
html[data-theme="day"] .mesh i{opacity:.26;mix-blend-mode:multiply;filter:blur(78px)}

/* ---------- 02. TRON : perspective floor running to the horizon */
.tron{
  position:absolute;left:0;right:0;bottom:0;height:44vh;pointer-events:none;z-index:0;
  overflow:hidden;perspective:340px;perspective-origin:50% 0%;
}
.tron i{
  position:absolute;inset:-120% 0 -20% 0;transform:rotateX(72deg);transform-origin:50% 0%;
  background-image:
    linear-gradient(to right,rgba(46,107,255,.30) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(34,224,255,.24) 1px,transparent 1px);
  background-size:60px 60px;
  /*  translate, not background-position: one repaints, the other composites */
  animation:tronrun 4.5s linear infinite;
  will-change:transform;
  -webkit-mask-image:linear-gradient(180deg,transparent,#000 42%,transparent 92%);
  mask-image:linear-gradient(180deg,transparent,#000 42%,transparent 92%);
}
@keyframes tronrun{from{transform:rotateX(72deg) translateY(0)}to{transform:rotateX(72deg) translateY(60px)}}

/* ---------- 03. STARFIELD : three parallax depths, no images ---- */
.stars{position:absolute;inset:0;pointer-events:none;z-index:0;overflow:hidden}
.stars i{position:absolute;top:0;left:0;width:2px;height:2px;border-radius:50%;background:transparent}
.stars i:nth-child(1){
  box-shadow:
    22vw 12vh 0 0 rgba(234,240,255,.55), 61vw 6vh 0 0 rgba(34,224,255,.5),
    83vw 22vh 0 0 rgba(234,240,255,.4), 12vw 34vh 0 0 rgba(155,107,255,.5),
    44vw 41vh 0 0 rgba(234,240,255,.35), 72vw 47vh 0 0 rgba(46,107,255,.55),
    31vw 58vh 0 0 rgba(234,240,255,.3),  91vw 63vh 0 0 rgba(34,224,255,.4);
  animation:starA 90s linear infinite;
}
.stars i:nth-child(2){
  width:1px;height:1px;
  box-shadow:
    8vw 19vh 0 0 rgba(234,240,255,.5),  37vw 9vh 0 0 rgba(234,240,255,.4),
    55vw 28vh 0 0 rgba(34,224,255,.45), 68vw 15vh 0 0 rgba(234,240,255,.3),
    17vw 49vh 0 0 rgba(155,107,255,.4), 79vw 38vh 0 0 rgba(234,240,255,.45),
    49vw 66vh 0 0 rgba(234,240,255,.28),95vw 52vh 0 0 rgba(46,107,255,.4);
  animation:starB 140s linear infinite;
}
.stars i:nth-child(3){
  width:3px;height:3px;
  box-shadow:
    28vw 26vh 0 0 rgba(34,224,255,.6), 64vw 36vh 0 0 rgba(155,107,255,.55),
    15vw 62vh 0 0 rgba(46,107,255,.5);
  filter:blur(.5px);animation:starC 60s linear infinite;
}
@keyframes starA{to{transform:translate3d(-6vw,3vh,0)}}
@keyframes starB{to{transform:translate3d(4vw,-2vh,0)}}
@keyframes starC{to{transform:translate3d(-9vw,5vh,0)}}
html[data-theme="day"] .stars{opacity:.25}

/* ---------- 04. HOLO : iridescent text, angle-animated ---------- */
@property --holo-a{syntax:"<angle>";initial-value:0deg;inherits:false}
.holo{
  background:conic-gradient(from var(--holo-a),
    #22E0FF, #2E6BFF 22%, #9B6BFF 42%, #FF5A6E 58%, #FFC93C 72%, #2BE3A0 86%, #22E0FF);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:holospin 9s linear infinite;
}
@keyframes holospin{to{--holo-a:360deg}}

/* ---------- 05. CHROMA : chromatic aberration on hover ---------- */
.chroma{position:relative;transition:text-shadow .22s ease}
.chroma:hover{
  text-shadow:-1.6px 0 rgba(255,90,110,.85), 1.6px 0 rgba(46,107,255,.85);
}

/* ---------- 06. EXTRUDE : layered 3D display text --------------- */
.extrude{
  color:var(--text);
  text-shadow:
    1px 1px 0 rgba(46,107,255,.55),  2px 2px 0 rgba(46,107,255,.44),
    3px 3px 0 rgba(46,107,255,.34),  4px 4px 0 rgba(46,107,255,.25),
    5px 5px 0 rgba(46,107,255,.18),  6px 6px 0 rgba(46,107,255,.12),
    7px 7px 0 rgba(46,107,255,.07),  8px 8px 24px rgba(46,107,255,.45);
}

/* ---------- 07. SPOTLIGHT : pointer-tracked light over a block -- */
.spotlight{position:relative;isolation:isolate}
.spotlight::before{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:-1;border-radius:inherit;
  background:radial-gradient(420px circle at var(--sx,50%) var(--sy,50%),
    rgba(46,107,255,.18), transparent 62%);
  opacity:0;transition:opacity .3s;
}
.spotlight:hover::before{opacity:1}

/* ---------- 08. SNAKE : a light that runs the border ------------ */
@property --snake-a{syntax:"<angle>";initial-value:0deg;inherits:false}
.snake{position:relative}
.snake::before{
  content:"";position:absolute;inset:-1px;border-radius:inherit;padding:1.5px;pointer-events:none;
  background:conic-gradient(from var(--snake-a),
    transparent 0deg, transparent 300deg, var(--cyan) 340deg, #fff 352deg, var(--violet) 358deg, transparent 360deg);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  animation:snakerun 3.4s linear infinite;
}
@keyframes snakerun{to{--snake-a:360deg}}

/* ---------- 09. RADAR : sweeping conic over a panel ------------- */
.radar{position:relative;overflow:hidden}
.radar::after{
  content:"";position:absolute;top:50%;left:50%;width:220%;aspect-ratio:1;
  transform:translate(-50%,-50%);pointer-events:none;border-radius:50%;
  background:conic-gradient(from 0deg,rgba(34,224,255,.16) 0deg,transparent 42deg,transparent 360deg);
  animation:spin 5.5s linear infinite;
}
@keyframes spin{to{transform:translate(-50%,-50%) rotate(1turn)}}

/* ---------- 10. BLOB : morphing liquid shape -------------------- */
.blob{
  border-radius:42% 58% 63% 37% / 41% 44% 56% 59%;
  animation:blobmorph 14s ease-in-out infinite;
}
@keyframes blobmorph{
  0%,100%{border-radius:42% 58% 63% 37% / 41% 44% 56% 59%}
  33%    {border-radius:64% 36% 38% 62% / 58% 33% 67% 42%}
  66%    {border-radius:36% 64% 55% 45% / 47% 62% 38% 53%}
}

/* ---------- 11. DEPTH : mouse parallax layers ------------------- */
.depth{transform-style:preserve-3d}   /* pointer-driven only, no standing promotion */
.depth [data-z]{transition:transform .18s cubic-bezier(.2,.7,.3,1)}

/* ---------- 12. SCROLL PROGRESS : native, no JS ----------------- */
.scrollbar-top{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:200;transform-origin:0 50%;
  background:var(--spectrum);transform:scaleX(0);
}
@supports (animation-timeline: scroll()){
  .scrollbar-top{
    animation:growx linear;
    animation-timeline:scroll(root block);
  }
  @keyframes growx{from{transform:scaleX(0)}to{transform:scaleX(1)}}
}

/* ---------- 13. VIEW REVEAL : native scroll-driven entrance ----- */
/*  .vreveal no longer hides anything. It settles once, from a state that is
    already legible, so a visitor arriving mid-page never meets a blank block
    waiting to be scrolled into existence. */
.vreveal{opacity:1;transform:none}

/* ---------- 14. STAGGER : letter-by-letter reveal --------------- */
.stagger span{
  display:inline-block;opacity:0;transform:translateY(.5em) rotateX(-40deg);
  animation:letterin .5s cubic-bezier(.2,.7,.3,1) forwards;
}
@keyframes letterin{to{opacity:1;transform:none}}

/* ---------- 15. ODOMETER : rolling digits ---------------------- */
.odo{display:inline-flex;overflow:hidden;height:1em;line-height:1;vertical-align:-.08em}
.odo i{display:block;font-style:normal;animation:roll .9s cubic-bezier(.2,.8,.2,1) forwards}
@keyframes roll{from{transform:translateY(-1em)}to{transform:translateY(0)}}

/* ---------- 16. GLASSCARD : refraction edge + inner bloom ------- */
.glasscard{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  background:linear-gradient(160deg,rgba(255,255,255,.09),rgba(255,255,255,.02) 42%,rgba(255,255,255,.05));
  border:1px solid rgba(255,255,255,.12);
  backdrop-filter:blur(14px) saturate(160%);-webkit-backdrop-filter:blur(14px) saturate(160%);
  box-shadow:0 30px 90px -50px #000, inset 0 1px 0 rgba(255,255,255,.16);
}
.glasscard::before{
  content:"";position:absolute;inset:0;pointer-events:none;border-radius:inherit;
  background:radial-gradient(120% 80% at 50% -20%,rgba(34,224,255,.16),transparent 60%);
}
html[data-theme="day"] .glasscard{
  background:linear-gradient(160deg,rgba(255,255,255,.92),rgba(255,255,255,.7));
  border-color:rgba(12,20,44,.1);
  box-shadow:0 24px 70px -46px rgba(12,20,44,.4), inset 0 1px 0 #fff;
}

/* ---------- 17. HAIRLINE GLOW : animated divider ---------------- */
.rule-live{height:1px;border:0;position:relative;overflow:hidden;background:var(--line)}
.rule-live::after{
  content:"";position:absolute;top:0;left:-30%;width:30%;height:100%;
  background:linear-gradient(90deg,transparent,var(--cyan),transparent);
  animation:railsweep 5s linear infinite;
}
@keyframes railsweep{0%{left:-30%}60%,100%{left:110%}}

/* ---------- 18. HALFTONE : dot-matrix mask overlay -------------- */
.halftone{position:relative}
.halftone::after{
  content:"";position:absolute;inset:0;pointer-events:none;border-radius:inherit;
  background-image:radial-gradient(rgba(255,255,255,.10) 1px,transparent 1px);
  background-size:5px 5px;
  -webkit-mask-image:radial-gradient(ellipse at 50% 0%,#000,transparent 72%);
  mask-image:radial-gradient(ellipse at 50% 0%,#000,transparent 72%);
}

/* ---------- 19. BLOOM : glow on the numbers that matter --------- */
.bloom{position:relative;display:inline-block}
.bloom::after{
  content:attr(data-bloom);position:absolute;inset:0;pointer-events:none;
  color:var(--cyan);filter:blur(14px);opacity:.55;z-index:-1;
}

/* ---------- 20. WIPE : clip-path reveal ------------------------- */
.wipe{clip-path:inset(0 100% 0 0);animation:wipein .8s cubic-bezier(.7,0,.2,1) forwards}
@keyframes wipein{to{clip-path:inset(0 0 0 0)}}

/* ---------- 21. CARDSTACK : pure-CSS 3D hover ------------------- */
.cardstack{perspective:1100px}
.cardstack > *{
  transition:transform .35s cubic-bezier(.2,.7,.3,1), box-shadow .35s;
  transform-style:preserve-3d;
}
.cardstack:hover > *{
  transform:rotateX(6deg) rotateY(-8deg) translateZ(18px);
  box-shadow:-24px 30px 70px -40px rgba(155,107,255,.85);
}

/* ---------- 22. SCROLLBAR ------------------------------------- */
*{scrollbar-width:thin;scrollbar-color:rgba(46,107,255,.5) transparent}
*::-webkit-scrollbar{width:10px;height:10px}
*::-webkit-scrollbar-track{background:transparent}
*::-webkit-scrollbar-thumb{
  background:linear-gradient(180deg,var(--cyan),var(--violet));
  border-radius:99px;border:3px solid transparent;background-clip:padding-box;
}
*::-webkit-scrollbar-thumb:hover{background:linear-gradient(180deg,var(--blue),var(--violet));background-clip:padding-box}

/* ---------- 23. MAGNET : button that leans toward the cursor ---- */
.magnet{transition:transform .2s cubic-bezier(.2,.7,.3,1)}

/* ---------- 24. SCRAMBLE : decrypting text --------------------- */
.scramble{font-variant-numeric:tabular-nums}
.scramble.busy{color:var(--cyan)}

/* ============================================================
   Showcase page helpers
   ============================================================ */
.fx-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.fx{
  position:relative;border-radius:var(--r);border:1px solid var(--line);
  background:var(--glass);overflow:hidden;min-height:190px;display:flex;flex-direction:column;
}
.fx .stage{
  flex:1;display:grid;place-items:center;padding:26px 18px;min-height:118px;position:relative;
  background:radial-gradient(120% 90% at 50% 0%,rgba(46,107,255,.10),transparent 62%);
}
.fx .meta{padding:12px 16px;border-top:1px solid var(--line);display:flex;align-items:center;gap:10px}
.fx .meta b{font-size:13px}
.fx .meta code{margin-left:auto;font-size:11px}
.fx-demo-box{
  width:78px;height:78px;background:var(--spectrum);
  box-shadow:0 18px 44px -18px rgba(155,107,255,.85);
}
.fx-demo-text{font:700 26px/1 var(--display);letter-spacing:-.03em}
.stat-v{font:700 34px/1 var(--display);letter-spacing:-.04em;margin:10px 0}
.stat-v .odo{vertical-align:-.06em}

@media(max-width:1000px){.fx-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.fx-grid{grid-template-columns:1fr}}

/* ============================================================
   Cost control
   ============================================================ */
@media(max-width:900px){
  /* blur radius is the expensive part on phones, not the count of layers */
  .mesh i{filter:blur(52px);opacity:.42}
  .tron{height:30vh}
  .stars i:nth-child(2){display:none}
  .glasscard{backdrop-filter:none;-webkit-backdrop-filter:none;background:rgba(14,20,32,.86)}
  .radar::after{animation-duration:9s}
}
@media(max-width:700px){
  /*  Four blurred sources plus a scale animation is the most expensive thing
      on the page. On a phone: two sources, and no scaling of a blurred layer. */
  .mesh i:nth-child(3),.mesh i:nth-child(4){display:none}
  .mesh.kenburns{animation:none}
  .stars i:nth-child(3){display:none}
}
@media(max-width:560px){
  .tron{display:none}
  .extrude{text-shadow:2px 2px 0 rgba(46,107,255,.5),4px 4px 18px rgba(46,107,255,.4)}
}

@media(prefers-reduced-motion:reduce){
  .mesh i,.tron i,.stars i,.holo,.snake::before,.radar::after,.blob,
  .rule-live::after,.stagger span,.odo i,.scrollbar-top,.vreveal,.wipe
    {animation:none !important}
  .stagger span{opacity:1 !important;transform:none !important}
  .wipe{clip-path:none !important}
  .vreveal{opacity:1 !important;transform:none !important}
  .cardstack:hover > *{transform:none}
  .depth [data-z]{transition:none}
  .chroma:hover{text-shadow:none}
}

/* If a device says it is low-power, drop the two heaviest layers. */
@media (update: slow), (prefers-reduced-data: reduce){
  .mesh,.stars,.tron{display:none}
}

/* ============================================================
   Global kill switch. The showcase page toggles this attribute,
   and it is the same switch a support engineer can flip to rule
   the graphics layer out of a rendering bug report.
   ============================================================ */
html[data-fx-off] .mesh,
html[data-fx-off] .stars,
html[data-fx-off] .tron,
html[data-fx-off] .grain,
html[data-fx-off] .aurora,
html[data-fx-off] .radar::after,
html[data-fx-off] .snake::before,
html[data-fx-off] .halftone::after{display:none !important}
html[data-fx-off] *{animation:none !important;transition:none !important}
html[data-fx-off] .holo,
html[data-fx-off] .grad-sweep{background:none;-webkit-text-fill-color:var(--text);color:var(--text)}
html[data-fx-off] .extrude{text-shadow:none}
html[data-fx-off] .stagger span{opacity:1;transform:none}
html[data-fx-off] .wipe{clip-path:none}
html[data-fx-off] .vreveal{opacity:1;transform:none}