/* LeVik Studio - startup hero and the AVSP pipeline cutaway.
   The cutaway is one inline SVG: three inputs converging into one stream,
   processor modules, a token that keeps the same shape through every
   station (the fixed form), two parts built once and reused, and the
   finished video at the screen. demo.js drives the step timeline. */

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: 88vh;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero-dust {
  position: absolute;
  inset: 5.5rem 0 0;
  pointer-events: none;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 55% 40% at 50% -8%, rgba(227, 164, 78, 0.13), transparent 65%),
    radial-gradient(ellipse 40% 35% at 88% 108%, rgba(120, 90, 160, 0.06), transparent 60%);
}

.hero-inner {
  position: relative;
  text-align: center;
  display: grid;
  justify-items: center;
  gap: 1.8rem;
  padding: 7rem 1.5rem 5rem;
  max-width: 62rem;
}

.hero-inner h1 {
  font-size: clamp(2.6rem, 6.2vw, 4.9rem);
}

.hero-sub {
  font-size: clamp(1.02rem, 1.5vw, 1.2rem);
  color: var(--muted);
  max-width: 42rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-top: 0.4rem;
}

/* ---------- Header CTA ---------- */

/* ---------- The machine ---------- */

.machine {
    border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(180deg, #060608, #050506);
  overflow: hidden;
}

.m-svg {
  display: block;
  width: 100%;
  height: auto;
}


/* the three inputs: portrait, voice, script */
.in-ic rect {
  fill: url(#mfill);
  stroke: rgba(236, 231, 220, 0.18);
  stroke-width: 1.6;
  transition: stroke 0.5s ease, opacity 0.6s ease;
}
.in-ic circle,
.in-ic path {
  stroke: rgba(236, 231, 220, 0.5);
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  transition: stroke 0.5s ease;
}
.in-ic.on rect { stroke-width: 2; }
.ic-portrait.on rect, .ic-portrait.on circle, .ic-portrait.on path { stroke: #86d9ff; }
.ic-voice.on rect, .ic-voice.on path { stroke: var(--amber-bright); }
.ic-script.on rect, .ic-script.on path { stroke: #ff77d9; }
.in-ic.gone { opacity: 0; }

/* the converge into one stream */
.cv {
  stroke: rgba(227, 164, 78, 0.55);
  stroke-width: 1.6;
  stroke-dasharray: 4 7;
  fill: none;
  opacity: 0;
  transition: opacity 0.6s ease;
}
.cv.on {
  opacity: 1;
  animation: dash-flow 1.6s linear infinite;
}
@keyframes dash-flow {
  to { stroke-dashoffset: -44; }
}
.merge-pt {
  fill: #1b130a;
  stroke: var(--amber-bright);
  stroke-width: 2;
  opacity: 0;
  transition: opacity 0.5s ease;
}
.merge-pt.on {
  opacity: 1;
  filter: drop-shadow(0 0 10px rgba(227, 164, 78, 0.7));
}

/* the lane */
.m-lane {
  stroke: rgba(227, 164, 78, 0.28);
  stroke-width: 2.4;
  stroke-dasharray: 3 9;
  opacity: 0;
  transition: opacity 0.6s ease;
}
.m-lane.on {
  opacity: 1;
  animation: dash-flow 1.3s linear infinite;
}

/* step 2: the neural core */
.tangle path { fill: none; stroke-linecap: round; opacity: 0; transition: opacity 0.6s ease; }
.tangle .t1 { stroke: #86d9ff; stroke-width: 1.6; }
.tangle .t2 { stroke: #86d9ff; stroke-width: 1.2; }
.tangle circle { fill: #86d9ff; opacity: 0; }
.tangle.on .t1, .tangle.on .t2, .tangle.on .t3 { opacity: 0.8; animation: tpulse 1.8s ease-in-out infinite alternate; }
.tangle.on circle { opacity: 1; }
@keyframes tpulse {
  from { opacity: 0.45; }
  to   { opacity: 0.95; }
}

/* step 3: prism, wave in, coordinates out */
.prism .tri {
  stroke: #86d9ff;
  stroke-width: 1.8;
  fill: rgba(134, 217, 255, 0.05);
  opacity: 0;
  transition: opacity 0.6s ease;
}
.prism .wave {
  stroke: var(--amber-bright);
  stroke-width: 2;
  fill: none;
  opacity: 0;
  transition: opacity 0.6s ease;
}
.prism circle {
  fill: #86d9ff;
  opacity: 0;
  transition: opacity 0.5s ease;
}
.prism.on .tri { opacity: 1; filter: drop-shadow(0 0 8px rgba(134, 217, 255, 0.4)); }
.prism.on .wave { opacity: 0.95; animation: wave-run 1.1s linear infinite; }
.prism.on circle { opacity: 0.9; }
@keyframes wave-run {
  to { stroke-dashoffset: -24; }
}
.prism .wave { stroke-dasharray: 6 6; }

/* the wireframe face */
.faceg circle, .faceg ellipse, .faceg path {
  stroke: #86d9ff;
  stroke-width: 1.6;
  fill: none;
  opacity: 0;
  transition: opacity 0.7s ease;
}
.faceg.on circle, .faceg.on ellipse, .faceg.on path {
  opacity: 0.9;
  filter: drop-shadow(0 0 7px rgba(134, 217, 255, 0.45));
}

/* step 4: render station inside the studio set */
.render .room {
  fill: none;
  stroke: rgba(236, 231, 220, 0.14);
  stroke-width: 1.4;
  opacity: 0;
  transition: opacity 0.8s ease;
}
.render .paint {
  fill: rgba(185, 138, 110, 0.25);
  stroke: var(--amber-bright);
  stroke-width: 1.8;
  opacity: 0;
  transition: opacity 0.8s ease;
}
.render .lb1, .render .lb2, .render .lb3 {
  fill: var(--amber-bright);
  opacity: 0;
  transition: opacity 0.6s ease;
}
.render .camg rect, .render .camg path {
  stroke: #86d9ff;
  stroke-width: 1.6;
  fill: none;
  opacity: 0;
  transition: opacity 0.6s ease;
}
.render.on .room { opacity: 1; }
.render.on .paint { opacity: 1; filter: drop-shadow(0 0 8px rgba(227, 164, 78, 0.45)); }
.render.on .lb1, .render.on .lb2, .render.on .lb3 { opacity: 0.95; animation: lbblink 1.6s ease-in-out infinite alternate; }
.render.on .camg rect, .render.on .camg path { opacity: 0.9; }
@keyframes lbblink {
  from { opacity: 0.5; }
  to   { opacity: 1; }
}

/* step 5: the finished host on a glass display */
.display .glassg {
  fill: rgba(12, 12, 16, 0.9);
  stroke: rgba(236, 231, 220, 0.2);
  stroke-width: 1.6;
  opacity: 0;
  transition: opacity 0.8s ease, stroke 0.6s ease, filter 0.6s ease;
}
.display .hostg {
  stroke: rgba(244, 240, 230, 0.9);
  stroke-width: 2;
  fill: none;
  opacity: 0;
  transition: opacity 0.8s ease;
}
.display .standg {
  stroke: rgba(236, 231, 220, 0.4);
  stroke-width: 2;
  opacity: 0;
  transition: opacity 0.8s ease;
}
.display.on .glassg {
  opacity: 1;
  stroke: var(--amber);
  filter: drop-shadow(0 0 16px rgba(227, 164, 78, 0.5));
}
.display.on .hostg { opacity: 1; }
.display.on .standg { opacity: 1; }

/* the travelling stream; the translate default is its rest position,
   so without JavaScript it does not sit clipped at the SVG origin */
.m-token {
  transform: translate(212px, 330px);
  transition: transform 2.1s cubic-bezier(0.45, 0.05, 0.25, 1);
}
.m-token .tk {
  fill: #1b130a;
  stroke: var(--amber-bright);
  stroke-width: 2;
  filter: drop-shadow(0 0 8px rgba(240, 184, 102, 0.6));
}

/* ---------- Reduced motion: the machine rests mid-cycle ---------- */

@media (prefers-reduced-motion: reduce) {
  .hero-dust { display: none; }
  .m-token { display: none; }
  .cv, .m-lane, .tangle path, .prism .wave { animation: none; }
}

/* ---------- Mobile ---------- */

@media (max-width: 680px) {
  html.has-3d .walk-intro-pin::before,
  html.has-3d .ch-pin::before {
    background: linear-gradient(180deg,
      rgba(10, 10, 13, 0) 4%,
      rgba(10, 10, 13, 0.95) 26%,
      rgba(10, 10, 13, 0.95) 76%,
      rgba(10, 10, 13, 0) 96%);
  }
}


/* ---------- the whole-page world (3D active) ---------- */

.world3d {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
html.has-3d .world3d { display: block; }

html.has-3d body { background: #050506; }
html.has-3d main,
html.has-3d .hero,
html.has-3d .walk { position: relative; z-index: 1; }

.world3d .world-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* the hero floats over the world with no solid panel */
html.has-3d .hero {
  background: linear-gradient(180deg, rgba(10,10,13,0.94), rgba(10,10,13,0.62) 55%, rgba(10,10,13,0.1) 88%, rgba(10,10,13,0));
  border-bottom: none;
}
html.has-3d[data-theme="light"] .hero {
  background: linear-gradient(180deg, rgba(243,239,230,0.96), rgba(243,239,230,0.7) 55%, rgba(243,239,230,0.12) 88%, rgba(243,239,230,0));
}
html.has-3d .hero-dust { display: none; }
/* the hero paragraph owns its band over the living world */
html.has-3d .hero-inner { position: relative; }
html.has-3d .hero-inner::before {
  content: "";
  position: absolute;
  inset: -3rem -2rem;
  background: radial-gradient(ellipse 62% 58% at 50% 46%, rgba(10, 10, 13, 0.82), rgba(10, 10, 13, 0.4) 62%, rgba(10, 10, 13, 0) 82%);
  pointer-events: none;
}
html.has-3d .hero-inner > * { position: relative; }

/* ---------- the walk ---------- */

/* In the document (no 3D) the walk is a readable section: the intro, then
   the SVG cutaway of the machine, then the caption chapters. Its children
   share the site container; over the 3D world they go full-bleed. */
.walk { padding-bottom: 3rem; }
.walk > * {
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
}

.walk-intro {
  padding: 5.5rem 1.5rem 2.5rem;
}
.walk-intro h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  max-width: 40rem;
}
.walk-intro .lede {
  font-size: clamp(1.02rem, 1.6vw, 1.18rem);
  color: var(--muted);
  max-width: 38rem;
  margin-top: 1.1rem;
}

.chapter {
  padding: 3.2rem 1.5rem;
  border-top: 1px solid var(--line);
}
.chapter p {
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  line-height: 1.5;
  color: var(--bone);
  max-width: 34rem;
}
.chapter-end p { color: var(--amber-bright); }

.chapter .ch-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 0.55rem;
}
.chapter-end .ch-label { color: var(--amber-bright); }

.machine { margin-top: 2.5rem; }

/* Over the 3D world the walk becomes scrollytelling: each segment is one
   and a half viewports tall and its pin sticks for the middle of that span,
   so every caption sits alone, centred, for a stretch of scroll, then hands
   over to the next as the segments cross. Sticky needs the parent taller
   than the pin; equal heights would give the pin no room to hold. */
html.has-3d .walk-intro {
  height: 145vh;
  height: 145svh;
  padding: 0 1.5rem;
  max-width: none;
}
/* the closing chapter holds a shorter pin, so the film ends on the CTA
   instead of fifty viewports of empty stage */
html.has-3d .chapter.ep-end {
  height: 116vh;
  height: 116svh;
}
html.has-3d .chapter {
  height: 160vh;
  height: 160svh;
  padding: 0 1.5rem;
  max-width: none;
  border-top: none;
}
html.has-3d .walk-intro-pin,
html.has-3d .ch-pin {
  isolation: isolate;
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}
html.has-3d .walk-intro .lede { text-align: center; margin-left: auto; margin-right: auto; }
/* an exit for visitors who got the idea and want the substance; fixed so
   it rides above the walk for its whole length */
.walk-skip {
  display: none;
  position: fixed;
  padding: 0.4rem 0.55rem;
  bottom: 1.1rem;
  right: 1.3rem;
  /* a quiet surface of its own: the link rides above a living scene, and
     thin wireframe must never take it apart */
  background: rgba(10, 10, 13, 0.92);
  border-radius: 3px;
  z-index: 6;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--faint);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-shadow: 0 1px 12px rgba(10, 10, 13, 0.9);
}
.walk-skip:hover { color: var(--bone); }
html.has-3d .walk-skip { display: inline-block; }
/* a soft dark field behind the caption so bright props passing under the
   text never take it apart; the world stays visible around it */
html.has-3d .walk-intro-pin::before,
html.has-3d .ch-pin::before {
  content: "";
  z-index: -1;
  position: absolute;
  left: 0;
  right: 0;
  top: 18vh;
  bottom: 18vh;
  background: radial-gradient(ellipse 74% 62% at 50% 50%, rgba(10, 10, 13, 0.78), rgba(10, 10, 13, 0.52) 62%, rgba(10, 10, 13, 0) 82%);
  pointer-events: none;
}
html.has-3d .chapter p {
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  max-width: 30rem;
  margin-top: 0.4rem;
  text-align: center;
  text-shadow: 0 2px 30px rgba(10, 10, 13, 0.9), 0 0 80px rgba(10, 10, 13, 0.8);
}
html.has-3d .chapter .ch-label {
  text-align: center;
  text-shadow: 0 2px 20px rgba(10, 10, 13, 0.9);
}

/* the display chapters: the caption takes the left column so the glass
   pane owns the right half of the frame */
html.has-3d .chapter-side .ch-pin {
  align-items: flex-start;
  text-align: left;
  padding-left: clamp(1.5rem, 9vw, 8rem);
}
html.has-3d .chapter-side .ch-label,
html.has-3d .chapter-side .ch-pin p {
  text-align: left;
}
@media (max-width: 680px) {
  html.has-3d .chapter-side .ch-pin {
    align-items: center;
    text-align: center;
    padding-left: 0;
  }
  html.has-3d .chapter-side .ch-label,
  html.has-3d .chapter-side .ch-pin p {
    text-align: center;
  }
}

/* ---------- the epilogue: film chapters to the close ---------- */

.ep .ch-pin { gap: 1.2rem; }
.ep .ch-label { margin-bottom: 0; }
.film-line {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  line-height: 1.35;
  color: var(--bone);
  max-width: 44rem;
}
.film-line-strong { color: var(--bone); font-weight: 500; }
.film-word {
  color: var(--amber);
  font-style: italic;
}
.film-sub {
  color: var(--muted);
  font-size: clamp(0.95rem, 1.4vw, 1.1rem);
  max-width: 36rem;
}
html.has-3d .film-line { text-shadow: 0 2px 30px rgba(10, 10, 13, 0.95), 0 0 16px rgba(10, 10, 13, 0.85); }
html.has-3d .film-sub { text-shadow: 0 2px 20px rgba(10, 10, 13, 0.95); }
.ep .big-lines {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 3.2vw, 2.6rem);
  line-height: 1.4;
  color: var(--bone);
  text-align: center;
}
.ep .idea-note {
  margin-top: 1.6rem;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: var(--faint);
}
.ep .hero-actions { margin-top: 0.6rem; }

/* document layout (no 3D): the epilogue reads as calm sections */
.ep { padding: 3.2rem 1.5rem; border-top: 1px solid var(--line); }
.ep .film-line, .ep .film-sub { text-align: left; margin-left: 0; }
.ep .film-line { font-size: clamp(1.3rem, 2.2vw, 1.7rem); }

/* over the world: staged, centered, no borders */
html.has-3d .ep {
  height: 150vh;
  height: 150svh;
  padding: 0 1.5rem;
  border-top: none;
  max-width: none;
}
html.has-3d .ep .ch-pin {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}
html.has-3d .ep .big-lines { text-shadow: 0 2px 30px rgba(10, 10, 13, 0.95), 0 0 18px rgba(10, 10, 13, 0.9); }
html.has-3d .ep .idea-note {
  color: var(--bone);
  background: rgba(10, 10, 13, 0.72);
  display: inline-block;
  padding: 0.45rem 0.9rem;
  border-radius: 8px;
}
html.has-3d .ep.ep-end .btn { box-shadow: 0 10px 34px rgba(227, 164, 78, 0.25); }

/* when 3D runs, the SVG cutaway inside the walk steps aside */
html.has-3d .machine { display: none; }

/* the footer is a sibling of main; without its own layer the opaque world
   canvas paints over it and the page ends in a black void */
html.has-3d:not([data-theme="light"]) .site-footer {
  position: relative;
  z-index: 2;
  background: #070709;
}
html.has-3d[data-theme="light"] .site-footer {
  position: relative;
  z-index: 2;
  background: linear-gradient(180deg, var(--bg), #e2dac7);
}

/* when 3D does not run there is no fixed canvas at all */
html:not(.has-3d) .world3d { display: none; }

/* ---------- light appearance: the film plays on paper ---------- */
[data-theme="light"] .machine {
  background: #f7f3ea;
}
html.has-3d[data-theme="light"] body { background: #f3efe6; }
[data-theme="light"] .walk-skip {
  background: rgba(244, 239, 230, 0.92);
  text-shadow: none;
}
[data-theme="light"] .chapter p,
[data-theme="light"] .chapter .ch-label,
[data-theme="light"] .walk-intro .lede {
  text-shadow: 0 1px 14px rgba(243, 239, 230, 0.9), 0 0 34px rgba(243, 239, 230, 0.8);
}
html[data-theme="light"].has-3d .chapter p,
html[data-theme="light"].has-3d .chapter .ch-label,
html[data-theme="light"].has-3d .walk-intro .lede {
  text-shadow: 0 1px 14px rgba(243, 239, 230, 0.95), 0 0 30px rgba(243, 239, 230, 0.9);
}
html[data-theme="light"].has-3d .film-line,
html[data-theme="light"].has-3d .film-sub,
html[data-theme="light"].has-3d .ep .big-lines,
html[data-theme="light"].has-3d .ep .idea-note {
  text-shadow: 0 1px 14px rgba(243, 239, 230, 0.95), 0 0 26px rgba(243, 239, 230, 0.9);
}
html[data-theme="light"].has-3d .ep .idea-note { background: rgba(243, 239, 230, 0.8); }
[data-theme="light"] .walk-intro-pin::before,
html[data-theme="light"].has-3d .ch-pin::before {
  background: radial-gradient(ellipse 74% 62% at 50% 50%, rgba(243, 239, 230, 0.82), rgba(243, 239, 230, 0.5) 62%, rgba(243, 239, 230, 0) 82%);
}
@media (max-width: 680px) {
  html[data-theme="light"].has-3d .ch-pin::before {
    background: linear-gradient(180deg,
      rgba(243, 239, 230, 0) 4%,
      rgba(243, 239, 230, 0.95) 26%,
      rgba(243, 239, 230, 0.95) 76%,
      rgba(243, 239, 230, 0) 96%);
  }
}
[data-theme="light"] .walk-intro-pin::before {
  background: radial-gradient(ellipse 62% 58% at 50% 46%, rgba(243, 239, 230, 0.85), rgba(243, 239, 230, 0.42) 62%, rgba(243, 239, 230, 0) 82%);
}