*        { box-sizing: border-box; }
html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #000;
}

/* ---- chaotic rainbow stage ---------------------------------------- */
.stage {
  position: fixed;
  inset: 0;
  overflow: hidden;
  background: #000;
}

/* Seamless scrolling rainbow. Animated with transform (compositor-only,
   no per-frame repaint) so it's smooth on mobile — and because it holds two
   identical rainbow cycles and slides by exactly one, there's no seam. */
/* Static, oversized, rotated wrapper that clips. Because it never moves it
   always covers the viewport (160vmax square, centered) -> no exposed corner.
   160vmax >= (w+h)/sqrt(2) for any aspect ratio, so the rotated square always
   contains the viewport. */
.bg {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 160vmax;
  height: 160vmax;
  margin: -80vmax 0 0 -80vmax;
  z-index: 0;
  overflow: hidden;
  transform: rotate(45deg);
}

/* The scrolling gradient lives INSIDE the rotated wrapper. It's twice as wide
   as the wrapper and holds two identical rainbow cycles, so translating by one
   cycle (-50%) loops seamlessly and it always fills the wrapper. Transform-only
   -> no per-frame repaint. */
.bg-strip {
  position: absolute;
  top: 0;
  left: 0;
  width: 200%;
  height: 100%;
  background: linear-gradient(
    90deg,
    #ff0000 0%,     #ff8a00 7.14%,  #ffe600 14.28%, #14ff00 21.42%,
    #00e5ff 28.57%, #0059ff 35.71%, #9d00ff 42.85%, #ff0000 50%,
    #ff8a00 57.14%, #ffe600 64.28%, #14ff00 71.42%, #00e5ff 78.57%,
    #0059ff 85.71%, #9d00ff 92.85%, #ff0000 100%
  );
  animation: bg-scroll 7s linear infinite;
  will-change: transform;
}

@keyframes bg-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }   /* one full cycle -> seamless loop */
}

/* ---- centered text block ------------------------------------------ */
.center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 5;                 /* cats sit both under and over this */
  text-align: center;
  pointer-events: none;
  width: 100%;
  padding: 0 4vw;
  animation: wobble 3.5s ease-in-out infinite;
}

@keyframes wobble {
  0%, 100% { transform: translate(-50%, -50%) rotate(-2deg) scale(1);    }
  50%      { transform: translate(-50%, -50%) rotate(2deg)  scale(1.04); }
}

.title {
  margin: 0;
  font-family: Impact, "Haettenschweiler", "Arial Narrow Bold", "Arial Black", sans-serif;
  font-weight: 900;
  font-size: clamp(3.5rem, 21vw, 20rem);
  line-height: 0.85;
  letter-spacing: 0.02em;
  text-transform: none;
  /* Outline built from stacked drop-shadows instead of -webkit-text-stroke,
     which renders unevenly on mobile with gradient-clipped text. */
  filter:
    drop-shadow(3px 0 0 #000)  drop-shadow(-3px 0 0 #000)
    drop-shadow(0 3px 0 #000)  drop-shadow(0 -3px 0 #000)
    drop-shadow(2px 2px 0 #000) drop-shadow(-2px 2px 0 #000)
    drop-shadow(2px -2px 0 #000) drop-shadow(-2px -2px 0 #000)
    drop-shadow(0 4px 5px rgba(0, 0, 0, 0.45));
}

.subtitle {
  margin: 0.4em auto 0;
  font-family: "Comic Sans MS", "Comic Sans", "Chalkboard SE", cursive;
  font-weight: 700;
  font-size: clamp(1rem, 4.5vw, 3rem);
  line-height: 1.1;
  max-width: 22ch;
  filter:
    drop-shadow(1.5px 0 0 #000) drop-shadow(-1.5px 0 0 #000)
    drop-shadow(0 1.5px 0 #000) drop-shadow(0 -1.5px 0 #000)
    drop-shadow(0 2px 2px rgba(0, 0, 0, 0.4));
  transform: rotate(-1.5deg);
}

.cta {
  margin: 0.55em auto 0;
  font-family: "Comic Sans MS", "Comic Sans", "Chalkboard SE", cursive;
  font-weight: 700;
  font-size: clamp(0.85rem, 3vw, 1.9rem);
  line-height: 1.15;
  max-width: 26ch;
  filter:
    drop-shadow(1.2px 0 0 #000) drop-shadow(-1.2px 0 0 #000)
    drop-shadow(0 1.2px 0 #000) drop-shadow(0 -1.2px 0 #000)
    drop-shadow(0 2px 2px rgba(0, 0, 0, 0.4));
  transform: rotate(1.5deg);
}

/* ---- rainbow-chase fill for any text ------------------------------ */
.rainbow {
  background-image: linear-gradient(
    90deg,
    #ff0000, #ff8a00, #ffe600, #14ff00,
    #00e5ff, #0059ff, #9d00ff, #ff00c8, #ff0000
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

/* ---- flying cats (injected by script.js) -------------------------- */
.cat {
  position: absolute;
  top: 0;
  left: 0;
  height: auto;
  user-select: none;
  -webkit-user-drag: none;
  pointer-events: none;
  will-change: transform;
  /* Tight shadow that hugs the cut-out silhouette (follows the alpha). */
  filter: drop-shadow(2px 4px 4px rgba(0, 0, 0, 0.55));
}

/* ---- framed floating video (injected by script.js) ---------------- */
.frame {
  position: absolute;
  top: 0;
  left: 0;
  padding: 6px;                       /* rainbow mat thickness */
  background: linear-gradient(
    45deg, #ff0000, #ffe600, #14ff00, #00e5ff, #9d00ff, #ff00c8
  );
  border: 5px solid #fff;             /* strong white frame */
  border-radius: 5px;
  box-shadow: 0 0 0 3px #000, 0 12px 26px rgba(0, 0, 0, 0.55);
  overflow: hidden;
  line-height: 0;
  pointer-events: none;
  will-change: transform;
}

.frame video {
  display: block;
  width: 100%;
  height: auto;
}

/* ---- sound toggle -------------------------------------------------- */
.sound {
  position: fixed;
  right: 14px;
  bottom: 14px;
  z-index: 9999;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 3px solid #fff;
  background: rgba(0, 0, 0, 0.55);
  font-size: 30px;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}
.sound:hover { background: rgba(0, 0, 0, 0.75); }

/* ---- be gentle for reduced-motion users --------------------------- */
/* The fonts are much smaller on phones, so the fixed-px outline looks
   proportionally too thick there — thin it out below the mobile breakpoint. */
@media (max-width: 640px) {
  .title {
    filter:
      drop-shadow(1.5px 0 0 #000)  drop-shadow(-1.5px 0 0 #000)
      drop-shadow(0 1.5px 0 #000)  drop-shadow(0 -1.5px 0 #000)
      drop-shadow(1px 1px 0 #000)  drop-shadow(-1px 1px 0 #000)
      drop-shadow(1px -1px 0 #000) drop-shadow(-1px -1px 0 #000)
      drop-shadow(0 2px 3px rgba(0, 0, 0, 0.45));
  }
  .subtitle, .cta {
    filter:
      drop-shadow(0.5px 0 0 #000) drop-shadow(-0.5px 0 0 #000)
      drop-shadow(0 0.5px 0 #000) drop-shadow(0 -0.5px 0 #000)
      drop-shadow(0 1px 1.5px rgba(0, 0, 0, 0.45));
  }
  /* Bump the small text up on phones — the vw-scaled sizes get too tiny. */
  .subtitle { font-size: clamp(1.35rem, 6.2vw, 2.1rem); }
  .cta      { font-size: clamp(1.05rem, 4.9vw, 1.7rem); }
}

@media (prefers-reduced-motion: reduce) {
  .bg-strip { animation: none; }
  .center   { animation: none; }
}