/* ============================================================
   Kinetics — effects-c.css
   Surface & Motion demos (cards 17–23)
   ============================================================ */

/* 17. Error shake */
.demo-shake-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 220px;
}
.demo-shake-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--bone);
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s ease;
}
.demo-shake-input::placeholder {
  color: var(--bone-faint);
}
.demo-shake-input.error {
  border-color: var(--danger);
  animation: shake-x 0.45s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}
.demo-shake-err {
  width: 100%;
  font-size: 11px;
  color: var(--danger);
  opacity: 0;
  height: 0;
  transition: opacity 0.2s ease;
}
.demo-shake-zone.invalid .demo-shake-err {
  opacity: 1;
  height: auto;
}
@keyframes shake-x {
  10%,
  90% {
    transform: translateX(-1px);
  }
  20%,
  80% {
    transform: translateX(2px);
  }
  30%,
  50%,
  70% {
    transform: translateX(-4px);
  }
  40%,
  60% {
    transform: translateX(4px);
  }
}

/* 18. Confetti burst */
.demo-confetti-zone {
  position: relative;
}
.demo-confetti-btn {
  padding: 13px 24px;
  background: var(--amber);
  color: var(--graphite);
  font-weight: 600;
  font-size: 14px;
  border-radius: 100px;
  transition: transform 0.2s var(--spring);
}
.demo-confetti-btn:active {
  transform: scale(0.94);
}
.confetti-particle {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  pointer-events: none;
  animation: confetti-fly 0.9s var(--glide) forwards;
}
@keyframes confetti-fly {
  0% {
    transform: translate(-50%, -50%) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translate(var(--tx), var(--ty)) rotate(var(--rot));
    opacity: 0;
  }
}

/* 19. Parallax tilt */
.demo-tilt-zone {
  perspective: 800px;
}
.demo-tilt-card {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 150px;
  height: 110px;
  background: linear-gradient(145deg, var(--card-2), var(--graphite-2));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--bone-dim);
  transform-style: preserve-3d;
  transition: transform 0.15s ease-out;
  will-change: transform;
  overflow: hidden;
}
.demo-tilt-card .glow {
  position: absolute;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    color-mix(in srgb, var(--amber) 40%, transparent),
    transparent 65%
  );
  pointer-events: none;
  transform: translate(-50%, -50%);
  left: 50%;
  top: 50%;
  opacity: 0;
  transition: opacity 0.2s ease;
}
.demo-tilt-card:hover .glow {
  opacity: 1;
}

/* 20. Wave loader */
.demo-dots {
  display: flex;
  gap: 7px;
}
.demo-dots span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--amber);
  animation: dot-wave 1.1s ease-in-out infinite;
}
.demo-dots span:nth-child(2) {
  animation-delay: 0.12s;
}
.demo-dots span:nth-child(3) {
  animation-delay: 0.24s;
}
.demo-dots span:nth-child(4) {
  animation-delay: 0.36s;
}
@keyframes dot-wave {
  0%,
  60%,
  100% {
    transform: translateY(0);
    opacity: 0.4;
  }
  30% {
    transform: translateY(-12px);
    opacity: 1;
  }
}

/* 21. Skeleton sweep */
.demo-skeleton-zone {
  display: flex;
  flex-direction: column;
  gap: 11px;
  width: 220px;
}
.demo-skel-line {
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(
    90deg,
    #ececef 25%,
    #dcdce0 50%,
    #ececef 75%
  );
  background-size: 200% 100%;
  animation: shimmer-sweep 1.4s ease-in-out infinite;
}
.demo-skel-line.short {
  width: 60%;
}
@keyframes shimmer-sweep {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* 22. Page peel */
.demo-peel-zone {
  position: relative;
  width: 150px;
  height: 110px;
  perspective: 1000px;
}
.demo-peel-card {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 14px;
  transform-origin: left center;
  backface-visibility: hidden;
  transition:
    transform 0.6s cubic-bezier(0.65, 0, 0.35, 1),
    opacity 0.6s ease;
}
.demo-peel-card:first-child {
  background: var(--graphite-2);
  color: var(--bone-dim);
}
.demo-peel-card.peeled {
  transform: rotateY(-130deg) translateX(-20px);
  opacity: 0;
}
.demo-peel-trigger {
  z-index: 3;
}

/* 23. Cursor spotlight */
.demo-spotlight-zone {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 130px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--graphite-2);
  overflow: hidden;
  cursor: crosshair;
}
.demo-spotlight-glow {
  position: absolute;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    color-mix(in srgb, var(--amber) 22%, transparent),
    transparent 70%
  );
  transform: translate(-50%, -50%);
  left: -200px;
  top: -200px;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.demo-spotlight-text {
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--bone-faint);
  pointer-events: none;
}

/* 34–36. Experimental surface treatments */
.demo-caustics { position: relative; width: 190px; height: 108px; display: grid; place-items: center; overflow: hidden; border: 1px solid color-mix(in srgb, var(--bone-faint) 55%, transparent); border-radius: var(--radius); background: color-mix(in srgb, var(--card-2) 75%, transparent); isolation: isolate; }.demo-caustics::before { content: ""; position: absolute; inset: -55%; z-index: -1; background: radial-gradient(ellipse at 25% 38%, color-mix(in srgb,var(--amber) 65%,transparent), transparent 24%), radial-gradient(ellipse at 72% 68%, color-mix(in srgb,var(--wire) 60%,transparent), transparent 25%), radial-gradient(ellipse at 52% 32%, color-mix(in srgb,var(--ok) 52%,transparent), transparent 20%); filter: blur(11px); animation: caustic-drift 9s ease-in-out infinite alternate; }.demo-caustics span { font: 600 12px var(--font-mono); letter-spacing: .14em; color: var(--bone); text-shadow: 0 1px 8px var(--graphite); }@keyframes caustic-drift { to { transform: translate(12%, -8%) rotate(17deg) scale(1.2); } }
.demo-chromatic { position: relative; font: 800 32px var(--font-display); letter-spacing: .08em; color: var(--bone); transition: transform .36s var(--spring); }.demo-chromatic::before,.demo-chromatic::after { content: attr(data-text); position: absolute; inset: 0; opacity: 0; transition: transform .36s var(--spring), opacity .18s ease; }.demo-chromatic::before { color: var(--wire); }.demo-chromatic::after { color: #ff5d73; }.demo-chromatic:hover { transform: scale(1.04); }.demo-chromatic:hover::before { opacity: .8; transform: translateX(-4px); }.demo-chromatic:hover::after { opacity: .72; transform: translateX(4px); }
.demo-warp-grid { position: relative; width: 178px; height: 106px; display: grid; place-items: center; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background-image: repeating-linear-gradient(0deg, transparent 0 17px, color-mix(in srgb,var(--bone-faint) 34%,transparent) 18px), repeating-linear-gradient(90deg, transparent 0 17px, color-mix(in srgb,var(--bone-faint) 34%,transparent) 18px); background-size: 18px 18px; transition: transform .65s var(--spring), background-size .65s var(--spring); }.demo-warp-grid::after { content:""; position:absolute; inset:0; background:radial-gradient(circle at 50% 50%, color-mix(in srgb,var(--amber) 35%,transparent), transparent 36%); opacity:.4; }.demo-warp-grid b { position: relative; z-index: 1; padding: 5px 8px; background: var(--graphite); border: 1px solid var(--line); font: 600 10px var(--font-mono); letter-spacing: .12em; color: var(--bone); }.demo-warp-grid:hover { transform: perspective(300px) rotateX(37deg) rotateZ(-4deg) scale(1.09); background-size: 13px 13px; }

/* ───────────────────────────────────────────────
   Added surface & motion (8–11)
   ─────────────────────────────────────────────── */

/* 8. Flip card */
.demo-flip-zone {
  perspective: 800px;
}
.demo-flip-card {
  position: relative;
  width: 150px;
  height: 110px;
  transform-style: preserve-3d;
  cursor: pointer;
  transition: transform 0.6s var(--spring);
}
.demo-flip-card.flipped {
  transform: rotateY(180deg);
}
.demo-flip-face {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  backface-visibility: hidden;
  font-weight: 600;
  font-size: 14px;
}
.demo-flip-face.front {
  background: var(--card-2);
  color: var(--bone);
}
.demo-flip-face.back {
  background: var(--amber);
  color: var(--graphite);
  transform: rotateY(180deg);
}

/* 9. Glitch text */
.demo-glitch {
  position: relative;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 34px;
  letter-spacing: -0.02em;
  color: var(--bone);
  cursor: pointer;
  user-select: none;
}
.demo-glitch::before,
.demo-glitch::after {
  content: attr(data-text);
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}
.demo-glitch::before {
  color: var(--danger);
}
.demo-glitch::after {
  color: var(--wire);
}
.demo-glitch:hover::before {
  opacity: 0.85;
  animation: glitch-a 0.4s steps(2) infinite;
}
.demo-glitch:hover::after {
  opacity: 0.85;
  animation: glitch-b 0.4s steps(2) infinite;
}
@keyframes glitch-a {
  0% {
    clip-path: inset(0 0 72% 0);
    transform: translate(-2px, -1px);
  }
  50% {
    clip-path: inset(42% 0 20% 0);
    transform: translate(2px, 1px);
  }
  100% {
    clip-path: inset(70% 0 0 0);
    transform: translate(-1px, 1px);
  }
}
@keyframes glitch-b {
  0% {
    clip-path: inset(60% 0 10% 0);
    transform: translate(2px, 1px);
  }
  50% {
    clip-path: inset(10% 0 60% 0);
    transform: translate(-2px, -1px);
  }
  100% {
    clip-path: inset(30% 0 40% 0);
    transform: translate(1px, -1px);
  }
}

/* 10. Border beam */
.demo-beam {
  position: relative;
  width: 150px;
  height: 110px;
  border-radius: var(--radius);
  padding: 1.5px;
  overflow: hidden;
  background: var(--line);
}
.demo-beam::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 200%;
  height: 200%;
  transform: translate(-50%, -50%);
  background: conic-gradient(
    from 0deg,
    transparent 0 72%,
    var(--amber) 84%,
    var(--bone) 90%,
    transparent 96% 100%
  );
  animation: beam-spin 3s linear infinite;
}
.demo-beam-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  border-radius: calc(var(--radius) - 1.5px);
  background: var(--card-2);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--bone-dim);
}
@keyframes beam-spin {
  to {
    transform: translate(-50%, -50%) rotate(1turn);
  }
}

/* 11. Aurora drift */
.demo-aurora {
  position: relative;
  width: 170px;
  height: 110px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  overflow: hidden;
  display: grid;
  place-items: center;
  background: #ffffff;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}
.demo-aurora::before {
  content: "";
  position: absolute;
  inset: -60%;
  background:
    radial-gradient(
      50% 60% at 25% 30%,
      rgba(255, 75, 140, 0.75),
      transparent 65%
    ),
    radial-gradient(
      55% 65% at 75% 40%,
      rgba(70, 150, 255, 0.75),
      transparent 65%
    ),
    radial-gradient(
      50% 60% at 45% 80%,
      rgba(50, 220, 150, 0.7),
      transparent 65%
    ),
    radial-gradient(
      45% 55% at 80% 85%,
      rgba(255, 180, 50, 0.65),
      transparent 60%
    );
  filter: blur(18px);
  animation: aurora-drift 3.8s ease-in-out infinite alternate;
  will-change: transform;
}
.demo-aurora:hover::before {
  animation-duration: 2s;
  filter: blur(14px);
}
.demo-aurora span {
  position: relative;
  z-index: 1;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 13px;
  color: #18181b;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 4px 12px;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}
@keyframes aurora-drift {
  0% {
    transform: translate(-14%, -10%) rotate(-12deg) scale(1.15);
  }
  50% {
    transform: translate(10%, -6%) rotate(15deg) scale(1.35);
  }
  100% {
    transform: translate(-6%, 12%) rotate(-8deg) scale(1.25);
  }
}

/* ───────────────────────────────────────────────
   Added surface & motion (24–26)
   ─────────────────────────────────────────────── */

/* 24. Shine sweep (pure CSS) */
.demo-shine {
  position: relative;
  overflow: hidden;
  width: 200px;
  height: 96px;
  display: grid;
  place-items: center;
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  color: var(--bone-dim);
  cursor: default;
}
.demo-shine::before {
  content: "";
  position: absolute;
  top: 0;
  left: -120%;
  width: 60%;
  height: 100%;
  transform: skewX(-20deg);
  background: linear-gradient(
    90deg,
    transparent,
    color-mix(in srgb, var(--bone) 25%, transparent),
    transparent
  );
}
.demo-shine:hover::before {
  left: 120%;
  transition: left 0.9s cubic-bezier(0.65, 0, 0.35, 1);
}

/* 25. Breathing orb (GPU accelerated, ultra smooth) */
.demo-breathe {
  position: relative;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: radial-gradient(
    circle at 45% 40%,
    #ff2a6d,
    #b30039
  );
  animation: breathe-scale 3.2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  transform: translateZ(0);
  will-change: transform;
}
.demo-breathe::before {
  content: "";
  position: absolute;
  inset: -14px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(255, 0, 81, 0.45) 0%,
    rgba(255, 0, 81, 0.15) 55%,
    transparent 72%
  );
  filter: blur(10px);
  z-index: -1;
  animation: breathe-glow 3.2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  transform: translateZ(0);
  will-change: transform, opacity;
}
.demo-breathe span {
  color: #ffffff;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
  pointer-events: none;
}
@keyframes breathe-scale {
  0%,
  100% {
    transform: scale(0.88);
  }
  50% {
    transform: scale(1.12);
  }
}
@keyframes breathe-glow {
  0%,
  100% {
    transform: scale(0.85);
    opacity: 0.35;
  }
  50% {
    transform: scale(1.4);
    opacity: 0.95;
  }
}

/* 26. Float bob (pure CSS) */
.demo-float-zone {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 140px;
}
.demo-float-card {
  width: 150px;
  height: 84px;
  display: grid;
  place-items: center;
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--bone-dim);
  animation: float-bob 4s ease-in-out infinite;
}
@keyframes float-bob {
  0%,
  100% {
    transform: translateY(0);
    box-shadow: 0 10px 20px -8px rgba(0, 0, 0, 0.55);
  }
  50% {
    transform: translateY(-12px);
    box-shadow: 0 26px 30px -10px rgba(0, 0, 0, 0.45);
  }
}

/* 27. Liquid blob (pure CSS) */
.demo-blob {
  width: 96px;
  height: 96px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--amber), var(--amber-deep));
  border-radius: 42% 58% 70% 30% / 45% 45% 55% 55%;
  animation: blob-morph 8s ease-in-out infinite;
}
.demo-blob span {
  color: var(--graphite);
  font-size: 11px;
  font-weight: 600;
}
@keyframes blob-morph {
  0%,
  100% {
    border-radius: 42% 58% 70% 30% / 45% 45% 55% 55%;
  }
  33% {
    border-radius: 70% 30% 46% 54% / 30% 60% 40% 70%;
  }
  66% {
    border-radius: 34% 66% 60% 40% / 65% 35% 65% 35%;
  }
}

/* ───────────────────────────────────────────────
   Added surface & motion (28–30)
   ─────────────────────────────────────────────── */

/* 28. Gradient shimmer text */
.demo-shimmer-text {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 40px;
  letter-spacing: -0.02em;
  background: linear-gradient(
    100deg,
    var(--bone-faint) 30%,
    var(--amber) 50%,
    var(--bone-faint) 70%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: text-shimmer 3s linear infinite;
}
@keyframes text-shimmer {
  to {
    background-position: -200% center;
  }
}

/* 29. Neon glow pulse */
.demo-neon {
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--amber);
  border: 1px solid var(--amber);
  border-radius: 100px;
  animation: neon-pulse 2s ease-in-out infinite;
}
@keyframes neon-pulse {
  0%,
  100% {
    text-shadow: 0 0 4px var(--amber);
    box-shadow:
      0 0 6px -1px var(--amber),
      inset 0 0 6px -2px var(--amber);
  }
  50% {
    text-shadow:
      0 0 12px var(--amber),
      0 0 22px var(--amber);
    box-shadow:
      0 0 18px 0 var(--amber),
      inset 0 0 12px -2px var(--amber);
  }
}

/* 30. Equalizer bars */
.demo-eq {
  display: flex;
  align-items: flex-end;
  gap: 5px;
  height: 56px;
}
.demo-eq span {
  width: 6px;
  height: 100%;
  background: var(--amber);
  border-radius: 3px;
  transform-origin: bottom;
  animation: eq-pump 1s ease-in-out infinite;
}
.demo-eq span:nth-child(2) {
  animation-delay: -0.8s;
}
.demo-eq span:nth-child(3) {
  animation-delay: -0.4s;
}
.demo-eq span:nth-child(4) {
  animation-delay: -0.6s;
}
.demo-eq span:nth-child(5) {
  animation-delay: -0.2s;
}
@keyframes eq-pump {
  0%,
  100% {
    transform: scaleY(0.25);
  }
  50% {
    transform: scaleY(1);
  }
}

/* 19. Radar pulse */
.demo-radar {
  position: relative;
  width: 120px;
  height: 120px;
  display: grid;
  place-items: center;
}
.demo-radar-core {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--amber), var(--amber-deep) 70%);
  box-shadow: 0 0 14px 0 color-mix(in srgb, var(--amber) 50%, transparent);
  z-index: 1;
}
.demo-radar-wave {
  position: absolute;
  inset: 0;
  margin: auto;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--amber);
  animation: radar-ping 2.4s cubic-bezier(0, 0.4, 0.2, 1) infinite;
}
.demo-radar-wave:nth-child(3) {
  animation-delay: 0.8s;
}
.demo-radar-wave:nth-child(4) {
  animation-delay: 1.6s;
}
@keyframes radar-ping {
  0% {
    transform: scale(0.4);
    opacity: 0.9;
  }
  100% {
    transform: scale(4.2);
    opacity: 0;
  }
}

/* 20. Newton's cradle */
.demo-cradle {
  display: flex;
  height: 110px;
  padding-top: 6px;
}
.demo-cradle-ball {
  position: relative;
  width: 22px;
  transform-origin: top center;
}
.demo-cradle-ball::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 1px;
  height: 56px;
  background: var(--line);
  transform: translateX(-50%);
}
.demo-cradle-ball::after {
  content: "";
  position: absolute;
  top: 54px;
  left: 50%;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  transform: translateX(-50%);
  background: radial-gradient(
    circle at 35% 30%,
    var(--bone),
    var(--bone-faint)
  );
}
.demo-cradle-ball.first {
  animation: cradle-l 1.2s ease-in-out infinite;
}
.demo-cradle-ball.last {
  animation: cradle-r 1.2s ease-in-out infinite;
}
@keyframes cradle-l {
  0%,
  50%,
  100% {
    transform: rotate(0);
  }
  25% {
    transform: rotate(48deg);
  }
}
@keyframes cradle-r {
  0%,
  50%,
  100% {
    transform: rotate(0);
  }
  75% {
    transform: rotate(-48deg);
  }
}

/* 21. Bouncing ball */
.demo-bounce {
  position: relative;
  width: 80px;
  height: 110px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.demo-bounce-ball {
  position: absolute;
  bottom: 14px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: radial-gradient(
    circle at 35% 30%,
    var(--amber),
    var(--amber-deep)
  );
  animation: bounce-drop 1s cubic-bezier(0.7, 0, 0.3, 1) infinite;
  will-change: transform;
}
.demo-bounce-shadow {
  position: absolute;
  bottom: 8px;
  width: 38px;
  height: 9px;
  border-radius: 50%;
  background: rgba(24, 24, 27, 0.25);
  animation: bounce-shade 1s cubic-bezier(0.7, 0, 0.3, 1) infinite;
}
@keyframes bounce-drop {
  0%,
  100% {
    transform: translateY(-54px) scaleY(1.05);
  }
  50% {
    transform: translateY(0) scaleY(0.8) scaleX(1.15);
  }
}
@keyframes bounce-shade {
  0%,
  100% {
    transform: scale(0.5);
    opacity: 0.25;
  }
  50% {
    transform: scale(1);
    opacity: 0.5;
  }
}

/* ───────────────────────────────────────────────
   Added surface & motion (22–24)
   ─────────────────────────────────────────────── */

/* 22. Marquee reveal (pure CSS) */
.demo-reveal-zone {
  position: relative;
  width: 220px;
  height: 100px;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--graphite-2);
}
.demo-reveal-track {
  display: flex;
  gap: 12px;
  width: max-content;
  padding: 18px 0;
  animation: reveal-scroll 6s linear infinite;
}
.demo-reveal-track:hover {
  animation-play-state: paused;
}
@keyframes reveal-scroll {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}
.demo-reveal-card {
  flex-shrink: 0;
  width: 80px;
  height: 64px;
  border-radius: var(--radius-sm);
  background: var(--card-2);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--bone-dim);
}

/* 23. Gradient border morph (pure CSS) */
.demo-gradborder {
  position: relative;
  width: 160px;
  height: 100px;
  border-radius: var(--radius);
  padding: 2px;
  overflow: hidden;
  background: var(--line);
}
.demo-gradborder::before {
  content: "";
  position: absolute;
  inset: -50%;
  background: conic-gradient(
    from 0deg,
    var(--amber),
    var(--wire),
    var(--ok),
    var(--danger),
    var(--amber)
  );
  animation: gradborder-spin 4s linear infinite;
}
@keyframes gradborder-spin {
  to {
    transform: rotate(1turn);
  }
}
.demo-gradborder-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  border-radius: calc(var(--radius) - 2px);
  background: var(--card-2);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--bone-dim);
}

/* 24. Text split reveal (pure CSS) */
.demo-split {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 30px;
  letter-spacing: -0.02em;
  color: var(--bone);
  cursor: pointer;
  user-select: none;
  display: flex;
  overflow: hidden;
}
.demo-split span {
  display: inline-block;
  transform: translateY(110%);
  transition: transform 0.5s var(--spring);
}
.demo-split span:nth-child(1) {
  transition-delay: 0ms;
}
.demo-split span:nth-child(2) {
  transition-delay: 40ms;
}
.demo-split span:nth-child(3) {
  transition-delay: 80ms;
}
.demo-split span:nth-child(4) {
  transition-delay: 120ms;
}
.demo-split span:nth-child(5) {
  transition-delay: 160ms;
}
.demo-split span:nth-child(6) {
  transition-delay: 200ms;
}
.demo-split span:nth-child(7) {
  transition-delay: 240ms;
}
.demo-split.in span {
  transform: translateY(0);
}
.demo-split span.accent {
  color: var(--amber);
}

/* 25. Hover lift card */
.demo-lift {
  width: 200px;
  padding: 20px;
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition:
    transform 0.5s var(--spring),
    box-shadow 0.5s var(--spring),
    border-color 0.3s ease;
}
.demo-lift:hover {
  transform: translateY(-10px);
  border-color: var(--bone-faint);
  box-shadow: 0 18px 40px -12px rgba(0, 0, 0, 0.7);
}
.demo-lift .demo-lift-title {
  font-weight: 600;
  font-size: 14px;
}
.demo-lift .demo-lift-sub {
  margin-top: 6px;
  font-size: 12px;
  color: var(--bone-dim);
}

/* 26. Sheen sweep */
.demo-sheen {
  position: relative;
  display: grid;
  place-items: center;
  width: 210px;
  height: 96px;
  background: linear-gradient(135deg, var(--graphite-2), var(--card));
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  font-weight: 700;
  font-family: var(--font-display);
  letter-spacing: 0.04em;
  color: var(--bone);
  cursor: pointer;
}
.demo-sheen::after {
  content: "";
  position: absolute;
  top: 0;
  left: -60%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    100deg,
    transparent,
    rgba(255, 255, 255, 0.18),
    transparent
  );
  transform: skewX(-18deg);
  transition: left 0.7s var(--glide);
}
.demo-sheen:hover::after {
  left: 120%;
}

/* 27. Clip wipe reveal */
.demo-wipe {
  position: relative;
  width: 210px;
  height: 96px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  border: 1px solid var(--line);
}
.demo-wipe-base,
.demo-wipe-over {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: 0.03em;
}
.demo-wipe-base {
  background: var(--card-2);
  color: var(--bone-dim);
}
.demo-wipe-over {
  background: var(--amber);
  color: var(--graphite);
  clip-path: inset(0 100% 0 0);
  transition: clip-path 0.5s var(--glide);
}
.demo-wipe:hover .demo-wipe-over {
  clip-path: inset(0 0 0 0);
}

/* 28. 3D cube rotate */
.demo-cube-scene {
  width: 112px;
  height: 112px;
  perspective: 620px;
}
.demo-cube {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transform: translateZ(-56px) rotateY(0deg);
  transition: transform 0.7s var(--spring);
  cursor: pointer;
}
.demo-cube-face {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: var(--card-2);
  border: 1px solid var(--line);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: 0.05em;
  color: var(--bone);
}
.demo-cube-face.front {
  transform: rotateY(0deg) translateZ(56px);
  color: var(--amber);
}
.demo-cube-face.right {
  transform: rotateY(90deg) translateZ(56px);
}
.demo-cube-face.back {
  transform: rotateY(180deg) translateZ(56px);
}
.demo-cube-face.left {
  transform: rotateY(-90deg) translateZ(56px);
}

/* 29. Jelly wobble */
.demo-jelly {
  display: grid;
  place-items: center;
  width: 118px;
  height: 118px;
  border-radius: 26px;
  background: linear-gradient(145deg, var(--amber), var(--amber-deep));
  color: var(--graphite);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.04em;
  cursor: pointer;
  user-select: none;
}
.demo-jelly:hover {
  animation: demo-jelly-wobble 0.8s var(--spring);
}
@keyframes demo-jelly-wobble {
  0% {
    transform: scale(1, 1);
  }
  25% {
    transform: scale(1.14, 0.86) translateY(2px);
  }
  45% {
    transform: scale(0.9, 1.1) translateY(-3px);
  }
  65% {
    transform: scale(1.05, 0.95);
  }
  82% {
    transform: scale(0.98, 1.02);
  }
  100% {
    transform: scale(1, 1);
  }
}

/* 30. Folding doors */
.demo-fold {
  position: relative;
  width: 212px;
  height: 112px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  perspective: 820px;
  cursor: pointer;
}
.demo-fold-inner {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--amber), var(--amber-deep));
  color: var(--graphite);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.06em;
}
.demo-fold-panel {
  position: absolute;
  top: 0;
  width: 50%;
  height: 100%;
  display: grid;
  place-items: center;
  background: var(--card-2);
  color: var(--bone-dim);
  font-size: 13px;
  backface-visibility: hidden;
  transition: transform 0.6s var(--glide);
}
.demo-fold-panel.left {
  left: 0;
  transform-origin: left center;
  border-right: 1px solid var(--line);
}
.demo-fold-panel.right {
  right: 0;
  transform-origin: right center;
}
.demo-fold:hover .demo-fold-panel.left {
  transform: rotateY(-108deg);
}
.demo-fold:hover .demo-fold-panel.right {
  transform: rotateY(108deg);
}

/* 31. Before / after compare */
.demo-compare {
  position: relative;
  width: 232px;
  height: 122px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  user-select: none;
  touch-action: none;
  cursor: ew-resize;
}
.demo-compare-layer {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: 0.05em;
}
.demo-compare-before {
  background: linear-gradient(135deg, var(--graphite-2), var(--card));
  color: var(--bone-dim);
}
.demo-compare-after {
  background: linear-gradient(135deg, var(--amber), var(--amber-deep));
  color: var(--graphite);
  clip-path: inset(0 50% 0 0);
}
.demo-compare-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  margin-left: -1px;
  background: var(--bone);
  pointer-events: none;
}
.demo-compare-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 34px;
  height: 34px;
  margin: -17px 0 0 -17px;
  display: grid;
  place-items: center;
  background: var(--bone);
  color: var(--graphite);
  border-radius: 50%;
  box-shadow: 0 2px 8px -1px rgba(0, 0, 0, 0.5);
  cursor: ew-resize;
}
.demo-compare-handle svg {
  width: 18px;
  height: 18px;
}

/* 32. Depth stack */
.demo-stack {
  position: relative;
  width: 152px;
  height: 110px;
  perspective: 720px;
  cursor: pointer;
}
.demo-stack-card {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--card-2);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.05em;
  color: var(--bone-dim);
  transition: transform 0.55s var(--spring);
}
.demo-stack-card:nth-child(1) {
  z-index: 3;
  background: var(--card);
  color: var(--amber);
  transform: translateY(0) scale(1);
}
.demo-stack-card:nth-child(2) {
  z-index: 2;
  transform: translateY(7px) scale(0.93);
}
.demo-stack-card:nth-child(3) {
  z-index: 1;
  transform: translateY(14px) scale(0.86);
}
.demo-stack:hover .demo-stack-card:nth-child(1) {
  transform: translateY(-48px) rotate(-5deg);
}
.demo-stack:hover .demo-stack-card:nth-child(2) {
  transform: translateY(0) scale(1) rotate(0deg);
}
.demo-stack:hover .demo-stack-card:nth-child(3) {
  transform: translateY(48px) rotate(5deg);
}

/* 33. Text wave */
.demo-textwave {
  display: flex;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 36px;
  letter-spacing: 0.02em;
  color: var(--bone);
}
.demo-textwave span {
  display: inline-block;
  animation: demo-textwave-bob 1.5s ease-in-out infinite;
}
@keyframes demo-textwave-bob {
  0%,
  100% {
    transform: translateY(0);
  }
  28% {
    transform: translateY(-13px);
    color: var(--amber);
  }
}
.demo-moire{position:relative;width:174px;height:112px;overflow:hidden;border:1px solid var(--line);border-radius:var(--radius);background:repeating-radial-gradient(circle at 45% 50%,transparent 0 4px,#d4d4d8 5px 6px),var(--card-2);animation:moire-a 15s linear infinite}.demo-moire i{position:absolute;inset:-30%;background:repeating-radial-gradient(circle at 58% 50%,transparent 0 5px,var(--amber) 6px 7px);opacity:.42;animation:moire-b 12s linear infinite reverse}.demo-moire b{position:absolute;inset:0;display:grid;place-items:center;color:var(--bone)}@keyframes moire-a{to{background-position:18px 9px}}@keyframes moire-b{to{transform:rotate(1turn)}}.demo-polar-foil{position:relative;width:180px;height:108px;display:grid;place-items:center;overflow:hidden;border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(135deg,#ffffff,#f4f4f8);color:var(--bone);box-shadow:0 4px 16px rgba(0,0,0,0.06);transition:.7s var(--spring)}.demo-polar-foil::before{content:"";position:absolute;inset:-80%;background:conic-gradient(transparent,var(--wire),var(--ok),var(--amber),transparent);mix-blend-mode:multiply;opacity:.22;animation:foil-spin 11s linear infinite}.demo-polar-foil:hover{transform:perspective(500px) rotateY(-13deg) rotateX(5deg)}.demo-polar-foil:hover::before{opacity:.55}.demo-polar-foil span{position:relative;font-weight:700}@keyframes foil-spin{to{transform:rotate(1turn)}}.demo-metaballs{position:relative;width:190px;height:110px;overflow:hidden;border-radius:var(--radius);background:var(--graphite);filter:contrast(18)}.demo-metaballs span{position:absolute;top:31px;width:48px;height:48px;border-radius:50%;background:var(--amber);filter:blur(7px);animation:mass-exchange 4.8s ease-in-out infinite}.demo-metaballs span:first-child{left:28px}.demo-metaballs span:nth-child(2){right:28px;animation-direction:reverse}.demo-metaballs i{position:absolute;left:75px;top:47px;width:40px;height:16px;background:var(--amber);filter:blur(7px);animation:neck-pulse 4.8s ease-in-out infinite}@keyframes mass-exchange{50%{transform:translateX(42px) scale(1.28)}}@keyframes neck-pulse{0%,100%{transform:scaleX(.2)}50%{transform:scaleX(1.5)}}

/* ---- New: Variable Weight ---- */
.demo-var-weight {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 200;
  font-variation-settings: "wght" 200;
  letter-spacing: 0.04em;
  color: var(--bone);
  cursor: default;
  transition:
    font-weight 0.55s var(--glide),
    font-variation-settings 0.55s var(--glide),
    letter-spacing 0.55s var(--glide),
    color 0.35s ease,
    text-shadow 0.45s ease;
}
.demo-var-weight:hover {
  font-weight: 800;
  font-variation-settings: "wght" 800;
  letter-spacing: -0.02em;
  color: var(--amber);
  text-shadow: 0 0 28px color-mix(in srgb, var(--amber) 35%, transparent);
}

/* ---- New: Specular Orbit ---- */
.demo-specular {
  position: relative;
  width: 168px;
  height: 108px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    linear-gradient(160deg, #242428 0%, #141417 55%, #1a1a1f 100%);
  box-shadow: inset 0 1px 0 color-mix(in srgb, var(--bone) 10%, transparent);
}
.demo-specular::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 86px;
  height: 86px;
  margin: -43px 0 0 -43px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    color-mix(in srgb, var(--bone) 55%, transparent) 0%,
    color-mix(in srgb, var(--amber) 25%, transparent) 35%,
    transparent 70%
  );
  filter: blur(2px);
  opacity: 0.55;
  animation: specular-orbit 4.2s linear infinite;
  transform-origin: center;
}
.demo-specular::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    125deg,
    transparent 40%,
    color-mix(in srgb, var(--bone) 8%, transparent) 50%,
    transparent 60%
  );
  mix-blend-mode: soft-light;
  pointer-events: none;
}
.demo-specular span {
  position: relative;
  z-index: 1;
  font: 700 13px var(--font-mono);
  letter-spacing: 0.16em;
  color: var(--bone-dim);
  transition: color 0.3s ease;
}
.demo-specular:hover span {
  color: var(--bone);
}
.demo-specular:hover::before {
  opacity: 0.9;
  animation-duration: 2.4s;
}
@keyframes specular-orbit {
  0%   { transform: rotate(0deg) translateX(46px) rotate(0deg); }
  100% { transform: rotate(360deg) translateX(46px) rotate(-360deg); }
}

/* ---- New: Noise Dissolve ---- */
.demo-noise-dissolve {
  position: relative;
  width: 180px;
  height: 108px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--card-2);
  cursor: pointer;
}
.demo-noise-dissolve > b {
  position: relative;
  z-index: 2;
  font: 700 14px var(--font-mono);
  letter-spacing: 0.14em;
  color: var(--bone);
  mix-blend-mode: difference;
}
.demo-noise-dissolve::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 50%, var(--amber), transparent 62%),
    linear-gradient(135deg, var(--wire), var(--amber-deep));
  opacity: 0;
  transform: scale(1.08);
  transition:
    opacity 0.55s var(--glide),
    transform 0.65s var(--spring);
}
.demo-noise-dissolve::after {
  content: "";
  position: absolute;
  inset: -20%;
  z-index: 1;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.9'/%3E%3C/svg%3E");
  background-size: 140px 140px;
  mix-blend-mode: overlay;
  animation: noise-shift 0.35s steps(3) infinite;
  transition: opacity 0.45s ease, filter 0.45s ease;
  pointer-events: none;
}
.demo-noise-dissolve:hover::before {
  opacity: 1;
  transform: scale(1);
}
.demo-noise-dissolve:hover::after {
  opacity: 0.12;
  filter: contrast(1.4) brightness(1.2);
}
@keyframes noise-shift {
  0% { transform: translate(0, 0); }
  33% { transform: translate(-3%, 2%); }
  66% { transform: translate(2%, -2%); }
  100% { transform: translate(0, 0); }
}

/* 43. Dither bloom */
.demo-dither-bloom {
  position: relative;
  width: 224px;
  height: 122px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    radial-gradient(circle at 50% 50%, rgba(255, 0, 81, 0.08), transparent 52%),
    #111114;
  isolation: isolate;
}
.demo-dither-bloom::before,
.demo-dither-bloom::after {
  content: "";
  position: absolute;
  inset: -18%;
}
.demo-dither-bloom::before {
  z-index: -1;
  background: radial-gradient(circle, var(--amber) 0 1.1px, transparent 1.5px);
  background-size: 7px 7px;
  -webkit-mask-image: radial-gradient(circle at var(--dither-x, 25%) var(--dither-y, 35%), #000 0 10%, rgba(0, 0, 0, 0.72) 34%, transparent 62%);
  mask-image: radial-gradient(circle at var(--dither-x, 25%) var(--dither-y, 35%), #000 0 10%, rgba(0, 0, 0, 0.72) 34%, transparent 62%);
  animation: dither-drift 6s steps(12) infinite;
}
.demo-dither-bloom::after {
  z-index: -2;
  background:
    radial-gradient(circle at 30% 35%, rgba(255, 0, 81, 0.44), transparent 32%),
    radial-gradient(circle at 72% 68%, rgba(91, 141, 239, 0.34), transparent 31%);
  filter: blur(17px);
  animation: dither-colour 6s ease-in-out infinite alternate;
}
.demo-dither-bloom > span {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(90deg, transparent 0 6px, rgba(255, 255, 255, 0.018) 6px 7px);
  mix-blend-mode: overlay;
}
.demo-dither-bloom b {
  position: absolute;
  left: 14px;
  bottom: 11px;
  color: var(--bone);
  font: 600 10px var(--font-mono);
  letter-spacing: 0.18em;
  mix-blend-mode: difference;
}
@keyframes dither-drift {
  0%, 100% { --dither-x: 22%; --dither-y: 34%; transform: translate(0); }
  35% { --dither-x: 68%; --dither-y: 29%; transform: translate(2px, -1px); }
  72% { --dither-x: 56%; --dither-y: 74%; transform: translate(-2px, 2px); }
}
@keyframes dither-colour {
  to { transform: translate(8%, -5%) scale(1.12); filter: blur(22px) hue-rotate(18deg); }
}

/* 44. Ferrofluid crown */
.demo-ferrofluid {
  position: relative;
  width: 150px;
  height: 150px;
  display: grid;
  place-items: center;
  filter: drop-shadow(0 12px 18px rgba(0, 0, 0, 0.14));
}
.demo-ferrofluid::before {
  content: "";
  position: absolute;
  inset: 11px;
  background:
    radial-gradient(circle at 37% 30%, rgba(255, 255, 255, 0.85) 0 4%, transparent 20%),
    conic-gradient(from 20deg, #71717a, #27272a 18%, #a1a1aa 28%, #3f3f46 48%, #71717a 67%, #18181b 82%, #71717a);
  clip-path: polygon(50% 0%, 56% 30%, 72% 7%, 70% 34%, 94% 20%, 76% 42%, 100% 50%, 76% 58%, 94% 80%, 70% 66%, 72% 93%, 56% 70%, 50% 100%, 44% 70%, 28% 93%, 30% 66%, 6% 80%, 24% 58%, 0 50%, 24% 42%, 6% 20%, 30% 34%, 28% 7%, 44% 30%);
  animation: ferro-pull 3.8s ease-in-out infinite;
}
.demo-ferrofluid > i {
  position: absolute;
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 36% 28%, rgba(255, 255, 255, 0.78), transparent 16%),
    radial-gradient(circle at 55% 62%, #52525b, #18181b 75%);
  box-shadow:
    inset -6px -7px 14px rgba(0, 0, 0, 0.45),
    inset 4px 4px 8px rgba(255, 255, 255, 0.25);
  animation: ferro-core 3.8s ease-in-out infinite;
}
.demo-ferrofluid > span {
  position: relative;
  z-index: 1;
  color: #ffffff;
  font: 600 9px var(--font-mono);
  letter-spacing: 0;
}
@keyframes ferro-pull {
  0%, 100% { transform: rotate(-4deg) scale(0.84); filter: brightness(0.92); }
  48% { transform: rotate(10deg) scale(1); filter: brightness(1.15); }
  68% { transform: rotate(4deg) scale(0.95); filter: brightness(1); }
}
@keyframes ferro-core {
  0%, 100% { transform: scale(1); }
  48% { transform: scale(0.88); }
}

/* 45. Lenticular shift */
.demo-lenticular {
  position: relative;
  width: 224px;
  height: 116px;
  overflow: hidden;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 16px;
  background:
    repeating-linear-gradient(90deg, transparent 0 5px, rgba(0, 0, 0, 0.025) 5px 6px),
    linear-gradient(115deg, #ffffff, #f1f1f5 52%, #ffffff);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
  perspective: 500px;
}
.demo-lenticular > span {
  position: relative;
  width: 180px;
  height: 38px;
  transform-style: preserve-3d;
  transition: transform 0.7s var(--glide);
}
.demo-lenticular > span::before,
.demo-lenticular > span::after {
  content: attr(data-a);
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--bone);
  font: 800 27px var(--font-display);
  letter-spacing: 0;
  transition:
    transform 0.7s var(--glide),
    opacity 0.5s ease;
}
.demo-lenticular > span::before {
  -webkit-mask: repeating-linear-gradient(90deg, #000 0 6px, transparent 6px 12px);
  mask: repeating-linear-gradient(90deg, #000 0 6px, transparent 6px 12px);
}
.demo-lenticular > span::after {
  content: attr(data-b);
  color: var(--amber);
  -webkit-mask: repeating-linear-gradient(90deg, transparent 0 6px, #000 6px 12px);
  mask: repeating-linear-gradient(90deg, transparent 0 6px, #000 6px 12px);
  transform: translateX(-7px);
  opacity: 0.34;
}
.demo-lenticular > i {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(105deg, transparent 25%, rgba(255, 0, 81, 0.08), transparent 68%);
  transform: translateX(-90%);
  transition: transform 0.8s var(--glide);
}
.demo-lenticular:hover > span {
  transform: rotateY(-11deg) skewY(-3deg) translateX(3px);
}
.demo-lenticular:hover > span::before {
  transform: translateX(7px);
  opacity: 0.32;
}
.demo-lenticular:hover > span::after {
  transform: translateX(0);
  opacity: 1;
}
.demo-lenticular:hover > i {
  transform: translateX(90%);
}

/* 46. Volumetric shaft */
.demo-volumetric {
  position: relative;
  width: 200px;
  height: 128px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: radial-gradient(120% 80% at 50% -10%, #1a1a20, #0b0b0d 70%);
}
.demo-volumetric span {
  position: absolute;
  inset: -20% -30%;
  background: repeating-linear-gradient(
    97deg,
    transparent 0 13px,
    rgba(255, 92, 144, 0.17) 14px 23px
  );
  -webkit-mask: radial-gradient(62% 96% at 50% 0%, #000 8%, transparent 74%);
  mask: radial-gradient(62% 96% at 50% 0%, #000 8%, transparent 74%);
  filter: blur(1.6px);
  animation: shaft-rake 9s ease-in-out infinite alternate;
}
.demo-volumetric i {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(1.6px 1.6px at 22% 30%, rgba(255, 190, 211, 0.85), transparent),
    radial-gradient(1.4px 1.4px at 58% 52%, rgba(255, 190, 211, 0.7), transparent),
    radial-gradient(1.2px 1.2px at 74% 24%, rgba(255, 190, 211, 0.6), transparent),
    radial-gradient(1.5px 1.5px at 40% 70%, rgba(255, 190, 211, 0.55), transparent),
    radial-gradient(1.1px 1.1px at 86% 62%, rgba(255, 190, 211, 0.5), transparent);
  animation: dust-drift 14s linear infinite;
}
.demo-volumetric b {
  position: absolute;
  left: 12%;
  right: 12%;
  bottom: -22px;
  height: 54px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(255, 74, 132, 0.34), transparent 76%);
  filter: blur(6px);
  animation: pool-breathe 9s ease-in-out infinite alternate;
}
@keyframes shaft-rake {
  from { transform: skewX(-9deg) translateX(-15px); opacity: 0.5; }
  to { transform: skewX(4deg) translateX(15px); opacity: 1; }
}
@keyframes dust-drift {
  from { transform: translate3d(-8px, 6px, 0); }
  to { transform: translate3d(10px, -10px, 0); }
}
@keyframes pool-breathe {
  from { transform: translateX(-14px) scaleX(0.86); opacity: 0.6; }
  to { transform: translateX(14px) scaleX(1.08); opacity: 1; }
}

/* 47. Letterpress emboss */
.demo-letterpress {
  --lx: 1;
  --ly: 1;
  display: grid;
  place-items: center;
  width: 200px;
  height: 112px;
  border-radius: var(--radius);
  background:
    repeating-linear-gradient(63deg, rgba(120, 96, 64, 0.045) 0 2px, transparent 2px 4px),
    linear-gradient(160deg, #efdde3, #ded5c4);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
  transition: box-shadow 0.5s ease;
}
.demo-letterpress span {
  color: rgba(90, 74, 52, 0.14);
  font: 800 40px var(--font-display);
  letter-spacing: 0.06em;
  text-shadow:
    calc(var(--lx) * 1px) calc(var(--ly) * 1px) 1px rgba(255, 255, 255, 0.9),
    calc(var(--lx) * -1px) calc(var(--ly) * -1px) 2px rgba(74, 28, 43, 0.45);
  animation: press-light 7s ease-in-out infinite alternate;
  transition:
    scale 0.45s var(--glide),
    filter 0.45s ease;
}
@keyframes press-light {
  0% { --lx: 1; --ly: 1; text-shadow: 1px 1px 1px rgba(255, 255, 255, 0.92), -1px -1px 2px rgba(74, 28, 43, 0.45); }
  50% { text-shadow: 1.5px -1px 1px rgba(255, 255, 255, 0.75), -1.5px 1px 2px rgba(74, 28, 43, 0.5); }
  100% { text-shadow: -1px -1px 1px rgba(255, 255, 255, 0.6), 1px 1px 2px rgba(74, 28, 43, 0.55); }
}
.demo-letterpress:hover span {
  scale: 0.99;
  filter: contrast(1.18);
}
.demo-letterpress:hover {
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.7),
    inset 0 0 26px rgba(74, 28, 43, 0.16);
}

/* 48. Rack focus */
.demo-rackfocus {
  position: relative;
  display: grid;
  place-items: center;
  width: 206px;
  height: 128px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #ffffff, #f3f3f7);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
}
.demo-rackfocus em {
  position: absolute;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(255, 0, 81, 0.38), rgba(255, 0, 81, 0.04) 78%, transparent);
  animation: bokeh-bloom 7.4s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}
.demo-rackfocus em:nth-of-type(1) { left: 18px; top: 20px; }
.demo-rackfocus em:nth-of-type(2) { right: 22px; top: 34px; animation-delay: 0.35s; }
.demo-rackfocus em:nth-of-type(3) { right: 54px; bottom: 16px; animation-delay: 0.7s; }
.demo-rack-far,
.demo-rack-near {
  position: absolute;
  font-family: var(--font-display);
  letter-spacing: 0;
  will-change: filter, transform;
}
.demo-rack-far {
  top: 32px;
  color: var(--bone-dim);
  font-size: 15px;
  font-weight: 600;
  animation: pull-far 7.4s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}
.demo-rack-near {
  bottom: 30px;
  color: var(--bone);
  font-size: 23px;
  font-weight: 800;
  animation: pull-near 7.4s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}
.demo-rackfocus b {
  position: absolute;
  right: 10px;
  bottom: 7px;
  color: var(--bone-faint);
  font-size: 8px;
  font-weight: 400;
  direction: ltr;
}
@keyframes pull-near {
  0%, 30% { filter: blur(0); opacity: 1; transform: scale(1); }
  50%, 82% { filter: blur(6px); opacity: 0.4; transform: scale(1.04); }
  100% { filter: blur(0); opacity: 1; transform: scale(1); }
}
@keyframes pull-far {
  0%, 30% { filter: blur(5px); opacity: 0.4; transform: scale(1.05); }
  50%, 82% { filter: blur(0); opacity: 1; transform: scale(1); }
  100% { filter: blur(5px); opacity: 0.4; transform: scale(1.05); }
}
@keyframes bokeh-bloom {
  0%, 30% { transform: scale(1.15); opacity: 0.75; filter: blur(4px); }
  50%, 82% { transform: scale(0.7); opacity: 0.25; filter: blur(1px); }
  100% { transform: scale(1.15); opacity: 0.75; filter: blur(4px); }
}

/* 49. E-ink refresh */
.demo-eink {
  position: relative;
  display: grid;
  place-items: center;
  width: 200px;
  height: 118px;
  overflow: hidden;
  border-radius: var(--radius);
  background:
    repeating-linear-gradient(0deg, rgba(30, 28, 22, 0.035) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(90deg, rgba(30, 28, 22, 0.03) 0 1px, transparent 1px 3px),
    linear-gradient(180deg, #f8f5ef, #ebe5d8);
  border: 1px solid var(--line);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.85);
}
.demo-eink span {
  position: relative;
  z-index: 1;
  color: #1c1a16;
  font: 800 22px var(--font-display);
  letter-spacing: 0;
  animation: eink-settle 5.2s ease-out infinite;
}
.demo-eink i {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: #27272a;
  pointer-events: none;
  animation: eink-flash 5.2s steps(1) infinite;
}
@keyframes eink-flash {
  0%, 8% { opacity: 0; }
  10%, 18% { opacity: 0.85; }
  20%, 100% { opacity: 0; }
}
@keyframes eink-settle {
  0%, 18% {
    opacity: 0;
    filter: contrast(3);
    transform: none;
  }
  24% {
    opacity: 1;
    filter: contrast(1.8);
    transform: translate(1px, -1px);
  }
  36%, 100% {
    opacity: 1;
    filter: none;
    transform: none;
  }
}

/* 50. Anamorphic flare */
.demo-flare {
  position: relative;
  display: grid;
  place-items: center;
  width: 214px;
  height: 118px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(80% 60% at 50% 50%, #fff0f5, #ffffff 75%);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
}
.demo-flare b {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow:
    0 0 10px var(--amber),
    0 0 24px rgba(91, 141, 239, 0.65);
  animation: flare-travel 6.4s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}
.demo-flare i,
.demo-flare em {
  position: absolute;
  left: -40%;
  right: -40%;
  height: 2.5px;
  pointer-events: none;
  animation: flare-bloom 6.4s ease-in-out infinite;
}
.demo-flare i {
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(91, 141, 239, 0.28) 22%,
    rgba(91, 141, 239, 0.95) 47%,
    var(--amber) 50%,
    rgba(255, 0, 81, 0.95) 53%,
    rgba(255, 0, 81, 0.25) 78%,
    transparent 100%
  );
  filter: blur(0.6px);
}
.demo-flare em {
  height: 16px;
  background: linear-gradient(
    90deg,
    transparent 28%,
    rgba(91, 141, 239, 0.24) 45%,
    rgba(255, 0, 81, 0.32) 50%,
    rgba(255, 0, 81, 0.24) 55%,
    transparent 72%
  );
  filter: blur(5px);
}
.demo-flare em::before,
.demo-flare em::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 18px;
  height: 7px;
  border-radius: 50%;
  background: rgba(91, 141, 239, 0.45);
  filter: blur(1px);
  transform: translateY(-50%);
}
.demo-flare em::before { left: 28%; }
.demo-flare em::after {
  right: 26%;
  width: 12px;
  height: 5px;
  background: rgba(255, 0, 81, 0.45);
}
@keyframes flare-travel {
  0% { translate: -86px 0; }
  100% { translate: 86px 0; }
}
@keyframes flare-bloom {
  0%, 100% { opacity: 0.22; transform: scaleX(0.38); }
  50% { opacity: 1; transform: scaleX(1); }
}

/* 51. LiDAR sweep */
.demo-lidar {
  position: relative;
  display: grid;
  place-items: center;
  width: 214px;
  height: 128px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(70% 80% at 50% 40%, #15181e, #0b0c10 74%);
}
.demo-lidar-field {
  display: grid;
  grid-template-columns: repeat(5, 12px);
  grid-template-rows: repeat(4, 16px);
  gap: 10px 14px;
}
.demo-lidar-field i {
  --lift: -5px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--wire);
  opacity: 0.18;
  box-shadow: none;
  animation: lidar-hit 6s var(--glide) infinite;
}
.demo-lidar-field i:nth-child(5n + 2) { --lift: -9px; }
.demo-lidar-field i:nth-child(5n + 3) { --lift: -14px; }
.demo-lidar-field i:nth-child(5n + 4) { --lift: -8px; }
.demo-lidar-field i:nth-child(n + 6) { animation-delay: 0.42s; }
.demo-lidar-field i:nth-child(n + 11) { animation-delay: 0.84s; }
.demo-lidar-field i:nth-child(n + 16) { animation-delay: 1.26s; }
@keyframes lidar-hit {
  0%, 10% {
    opacity: 0.16;
    transform: translateY(0) scale(0.7);
    box-shadow: none;
  }
  20%, 68% {
    opacity: 1;
    transform: translateY(var(--lift)) scale(1);
    box-shadow: 0 0 10px color-mix(in srgb, var(--wire) 70%, transparent);
  }
  86%, 100% {
    opacity: 0.16;
    transform: translateY(0) scale(0.7);
    box-shadow: none;
  }
}
.demo-lidar-plane {
  position: absolute;
  left: 18px;
  right: 18px;
  top: 16px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--wire), transparent);
  box-shadow: 0 0 14px color-mix(in srgb, var(--wire) 80%, transparent);
  animation: lidar-plane 6s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}
@keyframes lidar-plane {
  0% { transform: translateY(0); opacity: 0; }
  8% { opacity: 1; }
  86% { transform: translateY(92px); opacity: 1; }
  100% { transform: translateY(98px); opacity: 0; }
}
.demo-lidar b {
  position: absolute;
  right: 10px;
  bottom: 7px;
  color: var(--wire);
  font-size: 8px;
  font-weight: 500;
  letter-spacing: 0.16em;
  animation: lidar-label 6s ease-in-out infinite;
}
@keyframes lidar-label {
  0%, 8% { opacity: 0.35; }
  16%, 80% { opacity: 1; }
  92%, 100% { opacity: 0.35; }
}