/*!
 * SDS Motion Forge — buttons.css
 * Button animations (Section 2).
 * Part of the lossless v5 category split — combined entry: src/motion.css
 */

/* ============================================================
   SECTION 2 — BUTTON ANIMATIONS
   Namespace: .sds-btn-*
   ============================================================ */

/* 31 · Magnetic Pulse -------------------------------------- */

.sds-btn-magnetic {
  animation: sds-magnetPulse 2s ease infinite;
  outline: 2px solid transparent;
}

@keyframes sds-magnetPulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 var(--sds-primary-glow);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(0, 21, 209, 0);
    transform: scale(1.02);
  }
}

/* 32 · Liquid Fill ----------------------------------------- */

.sds-btn-liquid {
  background-image: linear-gradient(
    90deg,
    var(--sds-primary) 50%,
    transparent 50%
  );
  background-size: 200% 100%;
  background-position: 100% 0;
  animation: sds-liquidFill 2s ease infinite alternate;
}

@keyframes sds-liquidFill {
  from {
    background-position: 100% 0;
  }
  to {
    background-position: 0% 0;
  }
}

/* 33 · Energy Ripple --------------------------------------- */

.sds-btn-energy {
  animation: sds-energyRipple 2s ease infinite;
}

@keyframes sds-energyRipple {
  0% {
    box-shadow:
      0 0 0 0 var(--sds-primary-glow),
      0 0 0 0 var(--sds-primary-dim);
  }
  70% {
    box-shadow:
      0 0 0 12px rgba(0, 21, 209, 0),
      0 0 0 24px rgba(0, 21, 209, 0);
  }
  100% {
    box-shadow:
      0 0 0 0 rgba(0, 21, 209, 0),
      0 0 0 0 rgba(0, 21, 209, 0);
  }
}

/* 34 · Press Depth ----------------------------------------- */

.sds-btn-press {
  animation: sds-pressDepth 1.8s ease infinite;
}

@keyframes sds-pressDepth {
  0%,
  100% {
    transform: translateY(0);
    box-shadow:
      0 8px 0 rgba(0, 21, 209, 0.15),
      0 4px 16px rgba(0, 21, 209, 0.08);
  }
  50% {
    transform: translateY(4px);
    box-shadow:
      0 4px 0 rgba(0, 21, 209, 0.15),
      0 2px 8px rgba(0, 21, 209, 0.08);
  }
}

/* 35 · Edge Trace ------------------------------------------ */

.sds-btn-edge {
  border: none;
  background-image:
    linear-gradient(var(--sds-primary), var(--sds-primary)),
    linear-gradient(var(--sds-primary), var(--sds-primary)),
    linear-gradient(var(--sds-primary), var(--sds-primary)),
    linear-gradient(var(--sds-primary), var(--sds-primary));
  background-repeat: no-repeat;
  background-position:
    top left,
    right top,
    bottom right,
    left bottom;
  animation: sds-edgeTrace 2s linear infinite alternate;
}

@keyframes sds-edgeTrace {
  0% {
    background-size:
      0% 2px,
      2px 0%,
      0% 2px,
      2px 0%;
  }
  25% {
    background-size:
      100% 2px,
      2px 0%,
      0% 2px,
      2px 0%;
  }
  50% {
    background-size:
      100% 2px,
      2px 100%,
      0% 2px,
      2px 0%;
  }
  75% {
    background-size:
      100% 2px,
      2px 100%,
      100% 2px,
      2px 0%;
  }
  100% {
    background-size:
      100% 2px,
      2px 100%,
      100% 2px,
      2px 100%;
  }
}

/* 36 · Plasma Glow ----------------------------------------- */

.sds-btn-plasma {
  animation: sds-plasmaGlow var(--sds-duration-dramatic, 3s) ease infinite;
}

@keyframes sds-plasmaGlow {
  0% {
    box-shadow:
      0 0 12px var(--sds-primary-glow),
      inset 0 0 12px var(--sds-primary-dim);
  }
  33% {
    box-shadow:
      0 0 24px var(--sds-primary-glow),
      inset 0 0 18px var(--sds-primary-dim);
  }
  66% {
    box-shadow:
      0 0 20px rgba(209, 0, 40, 0.35),
      inset 0 0 14px rgba(209, 0, 40, 0.06);
  }
  100% {
    box-shadow:
      0 0 12px var(--sds-primary-glow),
      inset 0 0 12px var(--sds-primary-dim);
  }
}

/* 37 · Morph Pill ------------------------------------------ */

.sds-btn-morph {
  animation: sds-morphPill 2s ease infinite;
}

@keyframes sds-morphPill {
  0%,
  100% {
    border-radius: 10px;
  }
  50% {
    border-radius: 40px;
    transform: scaleX(0.95);
  }
}

/* 38 · Lift Shadow ----------------------------------------- */

.sds-btn-lift {
  animation: sds-liftShadow 2s ease infinite;
}

@keyframes sds-liftShadow {
  0%,
  100% {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(0, 21, 209, 0.1);
  }
  50% {
    transform: translateY(-6px);
    box-shadow:
      0 20px 40px rgba(0, 21, 209, 0.18),
      0 8px 16px rgba(0, 21, 209, 0.12);
  }
}

/* 39 · Shockwave ------------------------------------------- */

.sds-btn-shock {
  outline-style: solid;
  outline-color: transparent;
  animation: sds-shockwave 2s ease infinite;
}

@keyframes sds-shockwave {
  0% {
    outline-offset: 0;
    outline-width: 0;
    outline-color: var(--sds-primary-glow);
  }
  40% {
    outline-offset: 8px;
    outline-width: 2px;
    outline-color: rgba(0, 21, 209, 0.3);
  }
  100% {
    outline-offset: 20px;
    outline-width: 0;
    outline-color: rgba(0, 21, 209, 0);
  }
}

/* 40 · Neon Sign ------------------------------------------- */

.sds-btn-neon {
  animation: sds-neonSign 4s ease infinite;
}

@keyframes sds-neonSign {
  0%,
  95%,
  100% {
    box-shadow:
      0 0 8px var(--sds-primary-glow),
      0 0 20px var(--sds-primary-dim),
      inset 0 0 8px var(--sds-primary-dim);
  }
  96% {
    box-shadow: 0 0 2px rgba(0, 21, 209, 0.2);
  }
  97.5% {
    box-shadow:
      0 0 8px var(--sds-primary-glow),
      0 0 20px var(--sds-primary-dim);
  }
  98.5% {
    box-shadow: 0 0 1px rgba(0, 21, 209, 0.1);
  }
}

/* 41 · Volt Strike ----------------------------------------- */

.sds-btn-volt {
  animation: sds-voltagePulse 2.5s ease infinite;
}

/* 42 · Glow Surge ------------------------------------------ */

.sds-btn-glow-surge {
  animation: sds-glowSurge 2s ease infinite;
}

@keyframes sds-glowSurge {
  0%,
  100% {
    box-shadow:
      0 0 0 1px rgba(0, 21, 209, 0.15),
      0 4px 20px rgba(0, 21, 209, 0.06);
  }
  50% {
    box-shadow:
      0 0 0 1px rgba(0, 21, 209, 0.5),
      0 0 24px rgba(0, 21, 209, 0.2),
      0 4px 30px rgba(0, 21, 209, 0.1);
  }
}

/* 43 · Quantum Stamp --------------------------------------- */

.sds-btn-quantum {
  animation: sds-elasticStamp var(--sds-duration-base, 0.8s) var(--sds-easing) both;
  display: inline-block;
}

/* 44 · Ripple -------------------------------------------- */

.sds-btn-ripple {
  animation: sds-btnRipple 2s ease infinite;
}

@keyframes sds-btnRipple {
  0% {
    box-shadow:
      0 0 0 0 var(--sds-primary-glow),
      0 0 0 0 rgba(0, 21, 209, 0.12);
  }
  60% {
    box-shadow:
      0 0 0 10px rgba(0, 21, 209, 0),
      0 0 0 20px rgba(0, 21, 209, 0);
  }
  100% {
    box-shadow:
      0 0 0 0 rgba(0, 21, 209, 0),
      0 0 0 0 rgba(0, 21, 209, 0);
  }
}

/* 45 · Swipe ---------------------------------------------- */

.sds-btn-swipe {
  background-image: linear-gradient(
    90deg,
    transparent 0%,
    rgba(0, 21, 209, 0.12) 40%,
    rgba(0, 21, 209, 0.18) 50%,
    rgba(0, 21, 209, 0.12) 60%,
    transparent 100%
  );
  background-size: 300% 100%;
  animation: sds-btnSwipe 2.4s ease infinite;
}

@keyframes sds-btnSwipe {
  0% {
    background-position: -200% center;
  }
  100% {
    background-position: 300% center;
  }
}

/* 46 · Burst ---------------------------------------------- */

.sds-btn-burst {
  outline-style: solid;
  outline-color: transparent;
  animation: sds-btnBurst var(--sds-duration-slower, 2.2s) ease-in-out infinite;
}

@keyframes sds-btnBurst {
  0% {
    outline-width: 0;
    outline-offset: 0;
    outline-color: var(--sds-primary-glow);
    transform: scale(1);
  }
  30% {
    outline-width: 3px;
    outline-offset: 4px;
    outline-color: rgba(0, 21, 209, 0.3);
    transform: scale(1.03);
  }
  80% {
    outline-width: 0;
    outline-offset: 14px;
    outline-color: rgba(0, 21, 209, 0);
    transform: scale(1);
  }
  100% {
    outline-width: 0;
    outline-offset: 0;
  }
}

/* 47 · Scan ---------------------------------------------- */

.sds-btn-scan {
  background-image: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.3) 48%,
    rgba(255, 255, 255, 0.5) 50%,
    rgba(255, 255, 255, 0.3) 52%,
    transparent 100%
  );
  background-size: 250% 100%;
  animation: sds-btnScan 2s linear infinite;
}

@keyframes sds-btnScan {
  0% {
    background-position: -150% center;
  }
  100% {
    background-position: 250% center;
  }
}

/* 48 · Bounce -------------------------------------------- */

.sds-btn-bounce {
  animation: sds-btnBounce var(--sds-duration-slow, 1.4s) var(--sds-ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1)) infinite;
}

@keyframes sds-btnBounce {
  0%,
  100% {
    transform: scale(1);
  }
  40% {
    transform: scale(1.07);
  }
  60% {
    transform: scale(0.96);
  }
}

/* 49 · Gradient Shift ------------------------------------- */

.sds-btn-gradient-shift {
  background-image: linear-gradient(
    135deg,
    var(--sds-primary),
    #6366f1,
    var(--sds-accent),
    #8b5cf6,
    var(--sds-primary)
  );
  background-size: 400% 100%;
  animation: sds-btnGradShift 4s ease infinite;
}

@keyframes sds-btnGradShift {
  0% {
    background-position: 0% center;
  }
  50% {
    background-position: 100% center;
  }
  100% {
    background-position: 0% center;
  }
}

/* 50 · Outline Grow --------------------------------------- */

.sds-btn-outline-grow {
  animation: sds-btnOutlineGrow 2s ease infinite;
  outline-style: solid;
  outline-offset: 0;
}

@keyframes sds-btnOutlineGrow {
  0%,
  100% {
    outline-width: 0;
    outline-offset: 0;
    outline-color: var(--sds-primary-glow);
  }
  50% {
    outline-width: 2px;
    outline-offset: 5px;
    outline-color: rgba(0, 21, 209, 0.4);
  }
}

/* 51 · Shimmer -------------------------------------------- */

.sds-btn-shimmer {
  background-image: linear-gradient(
    105deg,
    transparent 40%,
    rgba(255, 255, 255, 0.45) 50%,
    transparent 60%
  );
  background-size: 200% 100%;
  animation: sds-btnShimmer 1.8s ease-in-out infinite;
}

@keyframes sds-btnShimmer {
  0% {
    background-position: -100% center;
  }
  100% {
    background-position: 200% center;
  }
}

/* 52 · Float --------------------------------------------- */

.sds-btn-float {
  animation: sds-btnFloat 2.6s ease-in-out infinite;
}

@keyframes sds-btnFloat {
  0%,
  100% {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(0, 21, 209, 0.1);
  }
  50% {
    transform: translateY(-5px);
    box-shadow: 0 16px 32px rgba(0, 21, 209, 0.16);
  }
}

/* 53 · Border Flow ---------------------------------------- */

.sds-btn-border-flow {
  animation: sds-btnBorderFlow var(--sds-duration-dramatic, 3s) linear infinite;
  outline: 2px solid transparent;
}

@keyframes sds-btnBorderFlow {
  0%,
  100% {
    box-shadow:
      inset 0 0 0 1.5px var(--sds-primary),
      0 0 8px var(--sds-primary-glow);
  }
  25% {
    box-shadow:
      inset 0 0 0 1.5px #8b5cf6,
      0 0 8px rgba(139, 92, 246, 0.3);
  }
  50% {
    box-shadow:
      inset 0 0 0 1.5px var(--sds-accent),
      0 0 8px rgba(209, 0, 40, 0.2);
  }
  75% {
    box-shadow:
      inset 0 0 0 1.5px #06b6d4,
      0 0 8px rgba(6, 182, 212, 0.25);
  }
}

/* 54 · Glow Core ------------------------------------------ */

.sds-btn-glow-core {
  animation: sds-btnGlowCore var(--sds-duration-slower, 2.2s) ease-in-out infinite;
}

@keyframes sds-btnGlowCore {
  0%,
  100% {
    box-shadow:
      inset 0 0 0 rgba(0, 21, 209, 0),
      0 0 0 rgba(0, 21, 209, 0);
  }
  50% {
    box-shadow:
      inset 0 0 20px var(--sds-primary-dim),
      0 0 30px var(--sds-primary-glow),
      0 0 60px rgba(0, 21, 209, 0.08);
  }
}

/* 55 · Kinetic -------------------------------------------- */

.sds-btn-kinetic {
  animation: sds-btnKinetic var(--sds-duration-base, 0.8s) ease-in-out infinite;
}

@keyframes sds-btnKinetic {
  0%,
  100% {
    transform: scale(1) rotate(0deg);
  }
  20% {
    transform: scale(1.04) rotate(0.3deg);
  }
  40% {
    transform: scale(0.97) rotate(-0.2deg);
  }
  60% {
    transform: scale(1.02) rotate(0.15deg);
  }
  80% {
    transform: scale(0.99) rotate(-0.1deg);
  }
}

/* 56 · Charge -------------------------------------------- */

.sds-btn-charge {
  animation: sds-btnCharge 2.4s ease-in-out infinite;
}

@keyframes sds-btnCharge {
  0% {
    box-shadow: 0 0 0 rgba(0, 21, 209, 0);
    filter: brightness(1);
  }
  60% {
    box-shadow:
      0 0 24px var(--sds-primary-glow),
      0 0 48px rgba(0, 21, 209, 0.12);
    filter: brightness(1.15);
    transform: scale(1.03);
  }
  80% {
    box-shadow: 0 0 4px rgba(0, 21, 209, 0.1);
    filter: brightness(1);
    transform: scale(1);
  }
  100% {
    box-shadow: 0 0 0 rgba(0, 21, 209, 0);
  }
}

/* 57 · Aurora -------------------------------------------- */

.sds-btn-aurora {
  animation: sds-btnAurora 4s ease-in-out infinite;
}

@keyframes sds-btnAurora {
  0%,
  100% {
    box-shadow:
      0 0 12px rgba(0, 21, 209, 0.25),
      0 0 30px rgba(0, 21, 209, 0.1);
  }
  25% {
    box-shadow:
      0 0 20px rgba(139, 92, 246, 0.35),
      0 0 40px rgba(139, 92, 246, 0.12);
  }
  50% {
    box-shadow:
      0 0 16px rgba(6, 182, 212, 0.3),
      0 0 35px rgba(6, 182, 212, 0.1);
  }
  75% {
    box-shadow:
      0 0 18px rgba(16, 185, 129, 0.3),
      0 0 36px rgba(16, 185, 129, 0.1);
  }
}

/* 58 · Heartbeat ----------------------------------------- */

.sds-btn-heartbeat {
  animation: sds-btnHeartbeat 1.2s ease-in-out infinite;
}

@keyframes sds-btnHeartbeat {
  0%,
  100% {
    transform: scale(1);
  }
  14% {
    transform: scale(1.08);
  }
  28% {
    transform: scale(0.97);
  }
  42% {
    transform: scale(1.05);
  }
  56% {
    transform: scale(1);
  }
}

/* 59 · Neon Trace ---------------------------------------- */

.sds-btn-neon-trace {
  animation: sds-btnNeonTrace var(--sds-duration-dramatic, 3s) ease infinite;
}

@keyframes sds-btnNeonTrace {
  0%,
  90%,
  100% {
    box-shadow:
      0 0 6px var(--sds-primary-glow),
      inset 0 0 6px var(--sds-primary-dim);
  }
  92% {
    box-shadow: 0 0 1px rgba(0, 21, 209, 0.1);
  }
  94% {
    box-shadow:
      0 0 10px var(--sds-primary-glow),
      inset 0 0 10px var(--sds-primary-dim);
  }
  96% {
    box-shadow: 0 0 2px rgba(0, 21, 209, 0.1);
  }
}

/* 60 · Gravity ------------------------------------------- */

.sds-btn-gravity {
  animation: sds-btnGravity 1.8s var(--sds-ease-bounce, cubic-bezier(0.68, -0.55, 0.27, 1.55)) infinite;
}

@keyframes sds-btnGravity {
  0%,
  100% {
    transform: translateY(0);
    box-shadow: 0 6px 0 rgba(0, 21, 209, 0.2);
  }
  50% {
    transform: translateY(4px);
    box-shadow: 0 2px 0 rgba(0, 21, 209, 0.2);
  }
}

/* 61 · Momentum ------------------------------------------ */

.sds-btn-momentum {
  animation: sds-btnMomentum 2s var(--sds-easing) both;
}

@keyframes sds-btnMomentum {
  0% {
    transform: translateX(-40px);
    filter: blur(8px);
    opacity: 0;
  }
  40% {
    filter: blur(0);
    opacity: 1;
    transform: translateX(4px);
  }
  60% {
    transform: translateX(-2px);
  }
  100% {
    transform: translateX(0);
    opacity: 1;
  }
}

/* 62 · Ice ----------------------------------------------- */

.sds-btn-ice {
  animation: sds-btnIce var(--sds-duration-dramatic, 3s) ease-in-out infinite;
}

@keyframes sds-btnIce {
  0%,
  100% {
    box-shadow:
      0 0 8px rgba(6, 182, 212, 0.3),
      inset 0 0 8px rgba(6, 182, 212, 0.08);
    filter: brightness(1);
  }
  50% {
    box-shadow:
      0 0 24px rgba(6, 182, 212, 0.5),
      inset 0 0 16px rgba(6, 182, 212, 0.12);
    filter: brightness(1.1);
  }
}

/* 63 · Fire ---------------------------------------------- */

.sds-btn-fire {
  animation: sds-btnFire 2s ease-in-out infinite;
}

@keyframes sds-btnFire {
  0%,
  100% {
    box-shadow:
      0 0 8px rgba(251, 113, 133, 0.35),
      0 4px 16px rgba(239, 68, 68, 0.15);
    filter: brightness(1);
  }
  33% {
    box-shadow:
      0 0 20px rgba(251, 146, 60, 0.5),
      0 6px 24px rgba(239, 68, 68, 0.2);
    filter: brightness(1.1);
  }
  66% {
    box-shadow:
      0 0 14px rgba(239, 68, 68, 0.4),
      0 4px 12px rgba(251, 113, 133, 0.15);
  }
}

/* 64 · Flux ---------------------------------------------- */

.sds-btn-flux {
  animation: sds-btnFlux 1.6s ease-in-out infinite;
}

@keyframes sds-btnFlux {
  0%,
  100% {
    filter: brightness(1) saturate(1);
    transform: scale(1);
  }
  25% {
    filter: brightness(1.12) saturate(1.3);
    transform: scale(1.02);
  }
  50% {
    filter: brightness(0.95) saturate(0.8);
    transform: scale(0.99);
  }
  75% {
    filter: brightness(1.08) saturate(1.2);
    transform: scale(1.01);
  }
}

/* 65 · Radar --------------------------------------------- */

.sds-btn-radar {
  position: relative;
  overflow: hidden;
  animation: sds-btnRadar 2s ease infinite;
}

@keyframes sds-btnRadar {
  0%,
  100% {
    box-shadow: inset 0 0 0 1px rgba(0, 21, 209, 0.25);
  }
  50% {
    box-shadow:
      inset 0 0 0 1px rgba(0, 21, 209, 0.6),
      inset 0 0 20px rgba(0, 21, 209, 0.06);
  }
}

/* 66 · Tilt ---------------------------------------------- */

.sds-btn-tilt {
  animation: sds-btnTilt var(--sds-duration-dramatic, 3s) ease-in-out infinite;
}

@keyframes sds-btnTilt {
  0%,
  100% {
    transform: perspective(400px) rotateY(0deg) rotateX(0deg);
  }
  25% {
    transform: perspective(400px) rotateY(6deg) rotateX(-2deg);
  }
  75% {
    transform: perspective(400px) rotateY(-6deg) rotateX(2deg);
  }
}

/* 67 · Stretch ------------------------------------------- */

.sds-btn-stretch {
  animation: sds-btnStretch 2s var(--sds-ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1)) infinite;
}

@keyframes sds-btnStretch {
  0%,
  100% {
    transform: scaleX(1) scaleY(1);
  }
  30% {
    transform: scaleX(1.1) scaleY(0.94);
  }
  60% {
    transform: scaleX(0.96) scaleY(1.04);
  }
}

/* 68 · Recoil -------------------------------------------- */

.sds-btn-recoil {
  animation: sds-btnRecoil 2.4s ease-in-out infinite;
}

@keyframes sds-btnRecoil {
  0%,
  100% {
    transform: scale(1);
  }
  10% {
    transform: scale(0.9);
  }
  20% {
    transform: scale(1.06);
  }
  30% {
    transform: scale(0.98);
  }
  40% {
    transform: scale(1.02);
  }
  50% {
    transform: scale(1);
  }
}

/* 69 · Depth Press --------------------------------------- */

.sds-btn-depth-press {
  animation: sds-btnDepthPress 2s ease-in-out infinite;
}

@keyframes sds-btnDepthPress {
  0%,
  100% {
    transform: perspective(300px) translateZ(0);
    box-shadow:
      0 10px 0 rgba(0, 21, 209, 0.18),
      0 5px 20px rgba(0, 21, 209, 0.1);
  }
  50% {
    transform: perspective(300px) translateZ(-8px);
    box-shadow:
      0 4px 0 rgba(0, 21, 209, 0.18),
      0 2px 8px rgba(0, 21, 209, 0.08);
  }
}

/* 70 · Rotate -------------------------------------------- */

.sds-btn-rotate {
  animation: sds-btnRotate 4s linear infinite;
}

@keyframes sds-btnRotate {
  0% {
    transform: perspective(500px) rotateY(0deg);
  }
  100% {
    transform: perspective(500px) rotateY(360deg);
  }
}

/* 71 · Pulse Border -------------------------------------- */

.sds-btn-pulse-border {
  animation: sds-btnPulseBorder 2s ease-in-out infinite;
  border: 1px solid rgba(0, 21, 209, 0.3);
}

@keyframes sds-btnPulseBorder {
  0%,
  100% {
    border-color: rgba(0, 21, 209, 0.3);
    border-width: 1px;
  }
  50% {
    border-color: var(--sds-primary);
    border-width: 2px;
    box-shadow: 0 0 12px var(--sds-primary-glow);
  }
}

/* 72 · Gravity Pull -------------------------------------- */

.sds-btn-gravity-pull {
  animation: sds-btnGravityPull 2.4s ease-in-out infinite;
}

@keyframes sds-btnGravityPull {
  0%,
  100% {
    box-shadow: 0 4px 6px rgba(0, 21, 209, 0.12);
    transform: translateY(0);
  }
  50% {
    box-shadow:
      0 24px 40px rgba(0, 21, 209, 0.22),
      0 8px 12px rgba(0, 21, 209, 0.1);
    transform: translateY(-4px);
  }
}

/* 73 · Warp --------------------------------------------- */

.sds-btn-warp {
  animation: sds-btnWarp 2.6s ease-in-out infinite;
}

@keyframes sds-btnWarp {
  0%,
  100% {
    transform: scaleX(1) scaleY(1) skewX(0deg);
  }
  25% {
    transform: scaleX(1.06) scaleY(0.95) skewX(-2deg);
  }
  75% {
    transform: scaleX(0.96) scaleY(1.04) skewX(2deg);
  }
}

/* 74 · Dissolve ------------------------------------------ */

.sds-btn-dissolve {
  animation: sds-btnDissolve var(--sds-duration-dramatic, 3s) ease-in-out infinite;
}

@keyframes sds-btnDissolve {
  0%,
  100% {
    opacity: 1;
    filter: blur(0);
  }
  40% {
    opacity: 0.7;
    filter: blur(1px) brightness(1.3);
  }
  60% {
    opacity: 1;
    filter: blur(0);
  }
}

/* 75 · Split -------------------------------------------- */

.sds-btn-split {
  animation: sds-btnSplit 2.8s ease-in-out infinite;
}

@keyframes sds-btnSplit {
  0%,
  100% {
    box-shadow:
      inset 0 0 0 1.5px rgba(0, 21, 209, 0.25),
      0 0 0 rgba(0, 21, 209, 0);
  }
  40% {
    box-shadow:
      inset 0 0 0 1.5px var(--sds-primary),
      0 0 20px var(--sds-primary-glow);
    transform: scaleX(1.04);
  }
  60% {
    box-shadow: inset 0 0 0 1.5px rgba(0, 21, 209, 0.4);
    transform: scaleX(0.97);
  }
}

/* 76 · Magnetic Trail ------------------------------------ */

.sds-btn-magnetic-trail {
  animation: sds-btnMagTrail 2s ease-in-out infinite;
}

@keyframes sds-btnMagTrail {
  0%,
  100% {
    box-shadow:
      -8px 0 20px rgba(0, 21, 209, 0),
      8px 0 20px rgba(0, 21, 209, 0);
  }
  50% {
    box-shadow:
      -12px 0 24px rgba(0, 21, 209, 0.2),
      12px 0 24px rgba(0, 21, 209, 0.1);
    transform: scale(1.02);
  }
}

/* 77 · Hologram ------------------------------------------ */

.sds-btn-hologram {
  animation: sds-btnHologram 4s linear infinite;
}

@keyframes sds-btnHologram {
  0%,
  100% {
    filter: hue-rotate(0deg) brightness(1);
  }
  5% {
    filter: hue-rotate(30deg) brightness(1.2);
  }
  6% {
    filter: hue-rotate(0deg) brightness(1);
  }
  40% {
    filter: hue-rotate(200deg) brightness(1.15);
  }
  41% {
    filter: hue-rotate(0deg) brightness(1);
  }
  80% {
    filter: hue-rotate(100deg) brightness(1.1);
  }
  81% {
    filter: hue-rotate(0deg) brightness(1);
  }
}

/* 78 · Crystal ------------------------------------------- */

.sds-btn-crystal {
  animation: sds-btnCrystal 2.4s ease-in-out infinite;
}

@keyframes sds-btnCrystal {
  0%,
  100% {
    filter: brightness(1) contrast(1);
  }
  30% {
    filter: brightness(1.25) contrast(1.1);
    box-shadow:
      0 0 16px rgba(255, 255, 255, 0.4),
      0 0 4px rgba(0, 21, 209, 0.2);
  }
  60% {
    filter: brightness(1) contrast(1);
  }
}

/* 79 · Flare -------------------------------------------- */

.sds-btn-flare {
  animation: sds-btnFlare 2.5s ease-in-out infinite;
}

@keyframes sds-btnFlare {
  0%,
  100% {
    box-shadow: 0 0 0 rgba(0, 21, 209, 0);
  }
  50% {
    box-shadow:
      0 0 40px rgba(0, 21, 209, 0.25),
      0 0 80px rgba(0, 21, 209, 0.08),
      0 0 120px rgba(0, 21, 209, 0.04);
    transform: scale(1.02);
  }
}

/* 80 · Amp ---------------------------------------------- */

.sds-btn-amp {
  animation: sds-btnAmp 0.6s ease-in-out infinite;
}

@keyframes sds-btnAmp {
  0%,
  100% {
    transform: scaleY(1);
  }
  25% {
    transform: scaleY(1.05);
  }
  75% {
    transform: scaleY(0.96);
  }
}

/*  GPU compositing hints (buttons) — split from the global will-change rule; must stay after the class definitions above  */

.sds-btn-neon,
.sds-btn-plasma,
.sds-btn-aurora,
.sds-btn-float,
.sds-btn-tilt,
.sds-btn-rotate {
  will-change: transform, opacity;
}

/* ============================================================
   SECTION 2b — BUTTON ANIMATIONS (v5 additions, 81–130)
   Compositor-only (R4): transform / opacity / filter / clip-path.
   Token-driven (SPEC §2): --sds-duration-*, --sds-ease-*.
   ============================================================ */

/* ─── Family: Liquid & Morph Fill ──────────────────────────── */

/* 81 · Fill Rise -------------------------------------------- */
.sds-btn-fill-rise {
  position: relative;
  overflow: hidden;
}
.sds-btn-fill-rise::before {
  content: "";
  position: absolute;
  left: -5%;
  right: -5%;
  bottom: 0;
  height: 130%;
  background: var(--sds-primary);
  opacity: 0.22;
  clip-path: polygon(0 18%, 25% 14%, 50% 19%, 75% 13%, 100% 17%, 100% 100%, 0 100%);
  transform: translateY(101%);
  animation: sds-btnFillRise var(--sds-duration-slower, 2.2s) var(--sds-ease-decelerate, cubic-bezier(0.16, 1, 0.3, 1)) infinite;
}
@keyframes sds-btnFillRise {
  0% {
    transform: translateY(101%);
    clip-path: polygon(0 18%, 25% 14%, 50% 19%, 75% 13%, 100% 17%, 100% 100%, 0 100%);
  }
  45% {
    transform: translateY(12%);
    clip-path: polygon(0 13%, 25% 19%, 50% 12%, 75% 18%, 100% 14%, 100% 100%, 0 100%);
  }
  60% {
    transform: translateY(-2%);
    clip-path: polygon(0 17%, 25% 13%, 50% 18%, 75% 14%, 100% 18%, 100% 100%, 0 100%);
  }
  70%,
  82% {
    transform: translateY(0%);
    clip-path: polygon(0 15%, 25% 15%, 50% 15%, 75% 15%, 100% 15%, 100% 100%, 0 100%);
  }
  100% {
    transform: translateY(101%);
  }
}

/* 82 · Fill Sweep ------------------------------------------- */
.sds-btn-fill-sweep {
  position: relative;
  overflow: hidden;
}
.sds-btn-fill-sweep::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 -40%;
  width: 120%;
  background: var(--sds-primary);
  opacity: 0.2;
  transform: translateX(-110%) skewX(-18deg);
  animation: sds-btnFillSweep var(--sds-duration-slower, 2.2s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
@keyframes sds-btnFillSweep {
  0% {
    transform: translateX(-110%) skewX(-18deg);
    filter: brightness(1);
  }
  42% {
    transform: translateX(28%) skewX(-18deg);
    filter: brightness(1.35);
  }
  55%,
  70% {
    transform: translateX(4%) skewX(-18deg);
    filter: brightness(1);
  }
  100% {
    transform: translateX(120%) skewX(-18deg);
  }
}

/* 83 · Fill Iris -------------------------------------------- */
.sds-btn-fill-iris {
  position: relative;
  overflow: hidden;
  animation: sds-btnFillIrisHost var(--sds-duration-slower, 2.2s) var(--sds-ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1)) infinite;
}
.sds-btn-fill-iris::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--sds-primary);
  opacity: 0.24;
  clip-path: circle(0% at 50% 50%);
  animation: sds-btnFillIris var(--sds-duration-slower, 2.2s) var(--sds-ease-decelerate, cubic-bezier(0.16, 1, 0.3, 1)) infinite;
}
@keyframes sds-btnFillIris {
  0%,
  8% {
    clip-path: circle(0% at 50% 50%);
  }
  42% {
    clip-path: circle(75% at 50% 50%);
  }
  62%,
  78% {
    clip-path: circle(72% at 50% 50%);
    opacity: 0.24;
  }
  100% {
    clip-path: circle(75% at 50% 50%);
    opacity: 0;
  }
}
@keyframes sds-btnFillIrisHost {
  0%,
  8% {
    transform: scale(0.985);
  }
  46% {
    transform: scale(1.012);
  }
  64%,
  100% {
    transform: scale(1);
  }
}

/* 84 · Fill Split ------------------------------------------- */
.sds-btn-fill-split {
  position: relative;
  overflow: hidden;
}
.sds-btn-fill-split::before,
.sds-btn-fill-split::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 51%;
  background: var(--sds-primary);
  opacity: 0.2;
}
.sds-btn-fill-split::before {
  left: 0;
  transform: translateX(-102%);
  animation: sds-btnFillSplitL var(--sds-duration-slower, 2.2s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
.sds-btn-fill-split::after {
  right: 0;
  transform: translateX(102%);
  animation: sds-btnFillSplitR var(--sds-duration-slower, 2.2s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
@keyframes sds-btnFillSplitL {
  0%,
  6% {
    transform: translateX(-102%);
    filter: brightness(1);
  }
  38% {
    transform: translateX(0);
    filter: brightness(1.45);
  }
  46%,
  74% {
    transform: translateX(0);
    filter: brightness(1);
  }
  100% {
    transform: translateX(-102%);
  }
}
@keyframes sds-btnFillSplitR {
  0%,
  6% {
    transform: translateX(102%);
    filter: brightness(1);
  }
  38% {
    transform: translateX(0);
    filter: brightness(1.45);
  }
  46%,
  74% {
    transform: translateX(0);
    filter: brightness(1);
  }
  100% {
    transform: translateX(102%);
  }
}

/* 85 · Fill Corner ------------------------------------------ */
.sds-btn-fill-corner {
  position: relative;
  overflow: hidden;
  animation: sds-btnFillCornerHost var(--sds-duration-slower, 2.2s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
.sds-btn-fill-corner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--sds-primary);
  opacity: 0.22;
  clip-path: polygon(0 0, 0 0, 0 0);
  animation: sds-btnFillCorner var(--sds-duration-slower, 2.2s) var(--sds-ease-decelerate, cubic-bezier(0.16, 1, 0.3, 1)) infinite;
}
@keyframes sds-btnFillCorner {
  0%,
  6% {
    clip-path: polygon(0 0, 0 0, 0 0);
  }
  44% {
    clip-path: polygon(0 0, 230% 0, 0 230%);
  }
  58%,
  78% {
    clip-path: polygon(0 0, 220% 0, 0 220%);
    opacity: 0.22;
  }
  100% {
    clip-path: polygon(0 0, 230% 0, 0 230%);
    opacity: 0;
  }
}
@keyframes sds-btnFillCornerHost {
  0%,
  40% {
    transform: rotate(0deg);
  }
  52% {
    transform: rotate(-0.5deg);
  }
  66%,
  100% {
    transform: rotate(0deg);
  }
}

/* 86 · Fill Drain ------------------------------------------- */
.sds-btn-fill-drain {
  position: relative;
  overflow: hidden;
}
.sds-btn-fill-drain::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--sds-primary);
  opacity: 0.22;
  animation: sds-btnFillDrain var(--sds-duration-dramatic, 3s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
@keyframes sds-btnFillDrain {
  0%,
  12% {
    transform: translateY(0);
  }
  38% {
    transform: translateY(96%);
  }
  44%,
  56% {
    transform: translateY(101%);
  }
  62% {
    transform: translateY(96%);
  }
  88%,
  100% {
    transform: translateY(0);
  }
}

/* 87 · Fill Wave -------------------------------------------- */
.sds-btn-fill-wave {
  position: relative;
  overflow: hidden;
}
.sds-btn-fill-wave::before {
  content: "";
  position: absolute;
  left: -15%;
  right: -15%;
  top: 30%;
  bottom: -10%;
  background: var(--sds-primary);
  opacity: 0.2;
  transform: translateY(120%) rotate(-8deg);
  animation: sds-btnFillWave var(--sds-duration-slower, 2.2s) var(--sds-ease-decelerate, cubic-bezier(0.16, 1, 0.3, 1)) infinite;
}
.sds-btn-fill-wave > * {
  display: inline-block;
  animation: sds-btnFillWaveLabel var(--sds-duration-slower, 2.2s) var(--sds-ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1)) infinite;
}
@keyframes sds-btnFillWave {
  0%,
  8% {
    transform: translateY(120%) rotate(-8deg);
  }
  45% {
    transform: translateY(6%) rotate(-3deg);
  }
  62%,
  80% {
    transform: translateY(0%) rotate(0deg);
  }
  100% {
    transform: translateY(120%) rotate(-6deg);
  }
}
@keyframes sds-btnFillWaveLabel {
  0%,
  38% {
    transform: translateY(0);
  }
  52% {
    transform: translateY(-2px);
  }
  68%,
  100% {
    transform: translateY(0);
  }
}

/* ─── Family: Border Draw & Corner Trace ───────────────────── */

/* 88 · Draw Perimeter --------------------------------------- */
.sds-btn-draw-perimeter {
  position: relative;
}
.sds-btn-draw-perimeter::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 2px solid var(--sds-primary);
  border-radius: inherit;
  clip-path: polygon(0 0, 0 0, 0 0);
  animation: sds-btnDrawPerimeter var(--sds-duration-slower, 2.2s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
@keyframes sds-btnDrawPerimeter {
  0% {
    clip-path: polygon(0 0, 0 0, 0 0, 0 0, 0 0, 0 0);
    opacity: 1;
  }
  24% {
    clip-path: polygon(0 0, 100% 0, 100% 50%, 100% 50%, 100% 50%, 0 0);
  }
  48% {
    clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 100%, 50% 100%, 0 0);
  }
  52% {
    transform: scale(1.012);
  }
  70%,
  84% {
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%, 0 50%, 0 0);
    opacity: 1;
    transform: scale(1);
  }
  100% {
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%, 0 50%, 0 0);
    opacity: 0;
  }
}

/* 89 · Draw Corners ----------------------------------------- */
.sds-btn-draw-corners {
  position: relative;
}
.sds-btn-draw-corners::before,
.sds-btn-draw-corners::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 2px solid var(--sds-primary);
}
.sds-btn-draw-corners::before {
  clip-path: polygon(0 0, 26% 0, 26% 3px, 3px 3px, 3px 26%, 0 26%, 0 0, 74% 0, 74% 3px, 100% 3px, 100% 0, 100% 26%, calc(100% - 3px) 26%, calc(100% - 3px) 0, 74% 0, 74% 0);
  animation: sds-btnDrawCornersA var(--sds-duration-slower, 2.2s) var(--sds-ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1)) infinite;
}
.sds-btn-draw-corners::after {
  clip-path: polygon(0 74%, 3px 74%, 3px calc(100% - 3px), 26% calc(100% - 3px), 26% 100%, 0 100%, 0 74%, 74% 100%, 74% calc(100% - 3px), calc(100% - 3px) calc(100% - 3px), calc(100% - 3px) 74%, 100% 74%, 100% 100%, 74% 100%, 74% 100%, 0 74%);
  animation: sds-btnDrawCornersB var(--sds-duration-slower, 2.2s) var(--sds-ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1)) infinite;
}
@keyframes sds-btnDrawCornersA {
  0%,
  10% {
    opacity: 0;
    transform: scale(1.18);
  }
  34% {
    opacity: 1;
    transform: scale(0.99);
  }
  44%,
  82% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(1.12);
  }
}
@keyframes sds-btnDrawCornersB {
  0%,
  16% {
    opacity: 0;
    transform: scale(1.18);
  }
  40% {
    opacity: 1;
    transform: scale(0.99);
  }
  50%,
  82% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(1.12);
  }
}

/* 90 · Draw Dash -------------------------------------------- */
.sds-btn-draw-dash {
  position: relative;
}
.sds-btn-draw-dash::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 2px dashed var(--sds-primary);
  border-radius: inherit;
  animation: sds-btnDrawDash var(--sds-duration-slower, 2.2s) steps(6) infinite;
}
@keyframes sds-btnDrawDash {
  0% {
    clip-path: inset(0 100% 0 0);
    opacity: 1;
    filter: brightness(1);
  }
  48% {
    clip-path: inset(0 0 0 0);
    filter: brightness(1);
  }
  60% {
    clip-path: inset(0 0 0 0);
    filter: brightness(0.75);
  }
  72%,
  86% {
    clip-path: inset(0 0 0 0);
    filter: brightness(1.15);
    opacity: 1;
  }
  100% {
    clip-path: inset(0 0 0 0);
    opacity: 0;
  }
}

/* 91 · Draw Cross ------------------------------------------- */
.sds-btn-draw-cross {
  position: relative;
  overflow: hidden;
}
.sds-btn-draw-cross::before,
.sds-btn-draw-cross::after {
  content: "";
  position: absolute;
  top: -60%;
  bottom: -60%;
  width: 2px;
  background: var(--sds-primary);
  opacity: 0;
}
.sds-btn-draw-cross::before {
  left: 20%;
  transform: rotate(28deg) translateX(-60px);
  animation: sds-btnDrawCrossA var(--sds-duration-slower, 2.2s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
.sds-btn-draw-cross::after {
  right: 20%;
  transform: rotate(-28deg) translateX(60px);
  animation: sds-btnDrawCrossB var(--sds-duration-slower, 2.2s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
@keyframes sds-btnDrawCrossA {
  0%,
  8% {
    transform: rotate(28deg) translateX(-70px);
    opacity: 0;
  }
  22% {
    opacity: 0.9;
  }
  46% {
    transform: rotate(28deg) translateX(70px);
    opacity: 0;
  }
  100% {
    transform: rotate(28deg) translateX(70px);
    opacity: 0;
  }
}
@keyframes sds-btnDrawCrossB {
  0%,
  18% {
    transform: rotate(-28deg) translateX(70px);
    opacity: 0;
  }
  32% {
    opacity: 0.9;
  }
  56% {
    transform: rotate(-28deg) translateX(-70px);
    opacity: 0;
  }
  100% {
    transform: rotate(-28deg) translateX(-70px);
    opacity: 0;
  }
}

/* 92 · Draw Pulse Frame ------------------------------------- */
.sds-btn-draw-pulse-frame {
  position: relative;
}
.sds-btn-draw-pulse-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 1.5px solid var(--sds-primary);
  border-radius: inherit;
  animation: sds-btnDrawPulseFrame var(--sds-duration-dramatic, 3s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
@keyframes sds-btnDrawPulseFrame {
  0% {
    clip-path: inset(0 100% 98% 0);
    opacity: 1;
    transform: scale(1);
  }
  20% {
    clip-path: inset(0 0 0 0);
    transform: scale(1);
  }
  38% {
    transform: scale(1.04);
    opacity: 0.55;
  }
  52% {
    transform: scale(1);
    opacity: 1;
  }
  68% {
    transform: scale(1.04);
    opacity: 0.55;
  }
  82%,
  100% {
    clip-path: inset(0 0 0 0);
    transform: scale(1);
    opacity: 1;
  }
}

/* 93 · Draw Underline Orbit --------------------------------- */
.sds-btn-draw-underline-orbit {
  position: relative;
}
.sds-btn-draw-underline-orbit::before {
  content: "";
  position: absolute;
  left: 18%;
  bottom: 4px;
  width: 64%;
  height: 2px;
  border-radius: 2px;
  background: var(--sds-primary);
  transform-origin: 50% -14px;
  animation: sds-btnDrawUnderlineOrbit var(--sds-duration-dramatic, 3s) var(--sds-ease-emphasized, cubic-bezier(0.215, 0.61, 0.355, 1)) infinite;
}
@keyframes sds-btnDrawUnderlineOrbit {
  0% {
    transform: scaleX(0);
    opacity: 0;
  }
  14% {
    transform: scaleX(1) rotate(0deg);
    opacity: 1;
  }
  28%,
  40% {
    transform: scaleX(1) rotate(0deg);
  }
  64% {
    transform: scaleX(0.5) rotate(180deg);
    opacity: 0.7;
  }
  82% {
    transform: scaleX(1) rotate(360deg);
    opacity: 1;
  }
  100% {
    transform: scaleX(1) rotate(360deg);
  }
}

/* ─── Family: Depth & Press Physics ────────────────────────── */

/* 94 · Press Spring ----------------------------------------- */
.sds-btn-press-spring {
  animation: sds-btnPressSpring var(--sds-duration-slower, 2.2s) var(--sds-ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1)) infinite;
}
@keyframes sds-btnPressSpring {
  0%,
  18% {
    transform: translateY(0) scale(1, 1);
  }
  26% {
    transform: translateY(-1px) scale(1.005, 1);
  }
  38% {
    transform: translateY(3px) scale(1.04, 0.96);
  }
  50% {
    transform: translateY(-2px) scale(0.99, 1.02);
  }
  60% {
    transform: translateY(1px) scale(1.01, 0.995);
  }
  70%,
  100% {
    transform: translateY(0) scale(1, 1);
  }
}

/* 95 · Press Coin ------------------------------------------- */
.sds-btn-press-coin {
  position: relative;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  animation: sds-btnPressCoin var(--sds-duration-slower, 2.2s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
.sds-btn-press-coin::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: #000;
  opacity: 0;
  animation: sds-btnPressCoinShade var(--sds-duration-slower, 2.2s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
@keyframes sds-btnPressCoin {
  0%,
  20% {
    transform: perspective(400px) rotateX(0deg);
  }
  36% {
    transform: perspective(400px) rotateX(12deg);
  }
  48% {
    transform: perspective(400px) rotateX(-3deg);
  }
  58%,
  100% {
    transform: perspective(400px) rotateX(0deg);
  }
}
@keyframes sds-btnPressCoinShade {
  0%,
  20% {
    opacity: 0;
  }
  36% {
    opacity: 0.18;
  }
  58%,
  100% {
    opacity: 0;
  }
}

/* 96 · Press Pop -------------------------------------------- */
.sds-btn-press-pop {
  animation: sds-btnPressPop var(--sds-duration-slower, 2.2s) var(--sds-ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1)) infinite;
}
.sds-btn-press-pop > * {
  display: inline-block;
  animation: sds-btnPressPopLabel var(--sds-duration-slower, 2.2s) var(--sds-ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1)) infinite;
}
@keyframes sds-btnPressPop {
  0%,
  22% {
    transform: scale(1);
  }
  32% {
    transform: scale(0.97);
  }
  46% {
    transform: scale(1.06);
  }
  58% {
    transform: scale(0.99);
  }
  68%,
  100% {
    transform: scale(1);
  }
}
@keyframes sds-btnPressPopLabel {
  0%,
  19% {
    transform: scale(1);
  }
  29% {
    transform: scale(0.95);
  }
  43% {
    transform: scale(1.1);
  }
  55% {
    transform: scale(0.99);
  }
  65%,
  100% {
    transform: scale(1);
  }
}

/* 97 · Press Seesaw ----------------------------------------- */
.sds-btn-press-seesaw {
  animation: sds-btnPressSeesaw var(--sds-duration-dramatic, 3s) ease-in-out infinite;
}
@keyframes sds-btnPressSeesaw {
  0%,
  100% {
    transform: perspective(420px) rotateX(0) rotateY(0);
  }
  12% {
    transform: perspective(420px) rotateX(3deg) rotateY(-2.4deg);
  }
  28% {
    transform: perspective(420px) rotateX(-2.4deg) rotateY(2deg);
  }
  44% {
    transform: perspective(420px) rotateX(1.6deg) rotateY(-1.2deg);
  }
  58% {
    transform: perspective(420px) rotateX(-1deg) rotateY(0.8deg);
  }
  70% {
    transform: perspective(420px) rotateX(0.5deg) rotateY(-0.4deg);
  }
  80% {
    transform: perspective(420px) rotateX(0) rotateY(0);
  }
}

/* 98 · Press Drop ------------------------------------------- */
.sds-btn-press-drop {
  position: relative;
  animation: sds-btnPressDrop var(--sds-duration-base, 0.8s) var(--sds-ease-emphasized, cubic-bezier(0.215, 0.61, 0.355, 1)) both;
}
.sds-btn-press-drop::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -6px;
  width: 70%;
  height: 8px;
  border-radius: 50%;
  border: 1.5px solid var(--sds-primary);
  opacity: 0;
  transform: translateX(-50%) scale(0.4);
  animation: sds-btnPressDropDust var(--sds-duration-base, 0.8s) var(--sds-ease-decelerate, cubic-bezier(0.16, 1, 0.3, 1)) both;
}
@keyframes sds-btnPressDrop {
  0% {
    opacity: 0;
    transform: translateY(-12px);
  }
  40% {
    opacity: 1;
    transform: translateY(0) scale(1.05, 0.94);
  }
  60% {
    transform: translateY(-3px) scale(0.99, 1.02);
  }
  78% {
    transform: translateY(0) scale(1.01, 0.99);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1, 1);
  }
}
@keyframes sds-btnPressDropDust {
  0%,
  38% {
    opacity: 0;
    transform: translateX(-50%) scale(0.4);
  }
  52% {
    opacity: 0.55;
    transform: translateX(-50%) scale(0.9);
  }
  100% {
    opacity: 0;
    transform: translateX(-50%) scale(1.5);
  }
}

/* 99 · Press Elastic ---------------------------------------- */
.sds-btn-press-elastic {
  animation: sds-btnPressElastic var(--sds-duration-slower, 2.2s) ease-in-out infinite;
}
@keyframes sds-btnPressElastic {
  0%,
  18% {
    transform: scale(1, 1);
  }
  30% {
    transform: scale(1.08, 0.94);
  }
  42% {
    transform: scale(0.95, 1.05);
  }
  54% {
    transform: scale(1.04, 0.97);
  }
  64% {
    transform: scale(0.99, 1.01);
  }
  74%,
  100% {
    transform: scale(1, 1);
  }
}

/* ─── Family: Glow & Energy (drop-shadow only) ─────────────── */

/* 100 · Halo Breathe ---------------------------------------- */
.sds-btn-halo-breathe {
  animation: sds-btnHaloBreathe var(--sds-duration-dramatic, 3s) ease-in-out infinite;
}
@keyframes sds-btnHaloBreathe {
  0%,
  100% {
    filter: drop-shadow(0 0 2px var(--sds-primary-glow)) brightness(1);
  }
  50% {
    filter: drop-shadow(0 0 14px var(--sds-primary-glow)) brightness(1.08);
  }
}

/* 101 · Halo Flicker On ------------------------------------- */
.sds-btn-halo-flicker-on {
  animation: sds-btnHaloFlickerOn var(--sds-duration-slow, 1.4s) steps(1) both;
}
@keyframes sds-btnHaloFlickerOn {
  0% {
    opacity: 0;
    filter: drop-shadow(0 0 0 transparent);
  }
  10% {
    opacity: 0.7;
    filter: drop-shadow(0 0 6px var(--sds-primary-glow));
  }
  14% {
    opacity: 0.15;
    filter: drop-shadow(0 0 0 transparent);
  }
  30% {
    opacity: 0.9;
    filter: drop-shadow(0 0 10px var(--sds-primary-glow));
  }
  36% {
    opacity: 0.4;
  }
  52% {
    opacity: 1;
    filter: drop-shadow(0 0 16px var(--sds-primary-glow)) brightness(1.15);
  }
  72%,
  100% {
    opacity: 1;
    filter: drop-shadow(0 0 8px var(--sds-primary-glow)) brightness(1);
  }
}

/* 102 · Spark Orbit ----------------------------------------- */
.sds-btn-spark-orbit {
  position: relative;
}
.sds-btn-spark-orbit::before {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--sds-primary);
  filter: drop-shadow(0 0 5px var(--sds-primary-glow));
  /* the spark rides the button's own border box; browsers without
     offset-path support simply show no orbiting spark (decorative) */
  offset-path: border-box;
  offset-rotate: 0deg;
  animation: sds-btnSparkOrbit var(--sds-duration-dramatic, 3s) linear infinite;
}
@keyframes sds-btnSparkOrbit {
  0% {
    offset-distance: 0%;
    opacity: 1;
  }
  46% {
    opacity: 1;
  }
  50% {
    offset-distance: 50%;
    opacity: 0.45;
  }
  54% {
    opacity: 1;
  }
  100% {
    offset-distance: 100%;
    opacity: 1;
  }
}

/* 103 · Surge Charge ---------------------------------------- */
.sds-btn-surge-charge {
  animation: sds-btnSurgeCharge var(--sds-duration-dramatic, 3s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
@keyframes sds-btnSurgeCharge {
  0%,
  14% {
    filter: brightness(1) drop-shadow(0 0 0 transparent);
    transform: scale(1);
  }
  38% {
    filter: brightness(0.85) saturate(1.15) drop-shadow(0 0 1px var(--sds-primary-glow));
    transform: scale(0.99);
  }
  52% {
    filter: brightness(1.3) drop-shadow(0 0 18px var(--sds-primary-glow));
    transform: scale(1.025);
  }
  64% {
    filter: brightness(1.05) drop-shadow(0 0 6px var(--sds-primary-glow));
    transform: scale(1);
  }
  80%,
  100% {
    filter: brightness(1) drop-shadow(0 0 0 transparent);
    transform: scale(1);
  }
}

/* 104 · Halo Split ------------------------------------------ */
.sds-btn-halo-split {
  position: relative;
}
.sds-btn-halo-split::before,
.sds-btn-halo-split::after {
  content: "";
  position: absolute;
  inset: 15% 30%;
  border-radius: 50%;
  background: var(--sds-primary);
  filter: blur(12px);
  opacity: 0;
  z-index: -1;
}
.sds-btn-halo-split::before {
  animation: sds-btnHaloSplitL var(--sds-duration-dramatic, 3s) ease-in-out infinite;
}
.sds-btn-halo-split::after {
  animation: sds-btnHaloSplitR var(--sds-duration-dramatic, 3s) ease-in-out infinite;
}
@keyframes sds-btnHaloSplitL {
  0%,
  100% {
    transform: translateX(0);
    opacity: 0.4;
  }
  45% {
    transform: translateX(-58%);
    opacity: 0.12;
  }
  62% {
    transform: translateX(-62%);
    opacity: 0;
  }
  80% {
    transform: translateX(-10%);
    opacity: 0.3;
  }
}
@keyframes sds-btnHaloSplitR {
  0%,
  100% {
    transform: translateX(0);
    opacity: 0.4;
  }
  45% {
    transform: translateX(58%);
    opacity: 0.12;
  }
  62% {
    transform: translateX(62%);
    opacity: 0;
  }
  80% {
    transform: translateX(10%);
    opacity: 0.3;
  }
}

/* 105 · Ember ----------------------------------------------- */
.sds-btn-ember {
  animation: sds-btnEmber var(--sds-duration-dramatic, 3s) ease-in-out infinite;
}
@keyframes sds-btnEmber {
  0%,
  100% {
    transform: skewX(0deg);
    filter: hue-rotate(0deg) brightness(1) drop-shadow(0 0 2px rgba(209, 64, 0, 0.25));
  }
  22% {
    transform: skewX(0.6deg);
    filter: hue-rotate(8deg) brightness(1.04) drop-shadow(0 0 5px rgba(209, 64, 0, 0.3));
  }
  48% {
    transform: skewX(-0.4deg);
    filter: hue-rotate(14deg) brightness(1.12) drop-shadow(0 0 10px rgba(209, 64, 0, 0.4));
  }
  72% {
    transform: skewX(0.3deg);
    filter: hue-rotate(6deg) brightness(1.03) drop-shadow(0 0 4px rgba(209, 64, 0, 0.28));
  }
}

/* ─── Family: Split & Slice ────────────────────────────────── */

/* 106 · Slice Reveal ---------------------------------------- */
.sds-btn-slice-reveal {
  animation: sds-btnSliceReveal var(--sds-duration-base, 0.8s) var(--sds-ease-decelerate, cubic-bezier(0.16, 1, 0.3, 1)) both;
}
@keyframes sds-btnSliceReveal {
  0% {
    opacity: 0;
    clip-path: polygon(0 0, 0 0, 0 50%, 100% 50%, 100% 100%, 100% 100%);
    transform: translateX(-14px);
  }
  45% {
    opacity: 1;
    clip-path: polygon(0 0, 80% 0, 80% 50%, 20% 50%, 20% 100%, 0 100%);
    transform: translateX(4px);
    filter: brightness(1.2);
  }
  70% {
    clip-path: polygon(0 0, 100% 0, 100% 50%, 0 50%, 0 100%, 0 100%);
    filter: brightness(1);
  }
  100% {
    opacity: 1;
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%, 0 100%, 0 0);
    transform: translateX(0);
  }
}

/* 107 · Slice Hover ----------------------------------------- */
.sds-btn-slice-hover {
  animation: sds-btnSliceHover var(--sds-duration-dramatic, 3s) steps(1) infinite;
}
@keyframes sds-btnSliceHover {
  0%,
  100% {
    clip-path: none;
    transform: none;
  }
  6% {
    clip-path: inset(0 0 48% 0);
    transform: translateX(4px);
  }
  8% {
    clip-path: inset(52% 0 0 0);
    transform: translateX(-4px);
  }
  10% {
    clip-path: none;
    transform: none;
  }
  54% {
    clip-path: inset(0 0 48% 0);
    transform: translateX(-3px);
  }
  56% {
    clip-path: inset(52% 0 0 0);
    transform: translateX(3px);
  }
  58% {
    clip-path: none;
    transform: none;
  }
}

/* 108 · Blinds ---------------------------------------------- */
.sds-btn-blinds {
  position: relative;
  animation: sds-btnBlindsHost var(--sds-duration-base, 0.8s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) both;
}
.sds-btn-blinds::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: repeating-linear-gradient(
    90deg,
    var(--sds-primary) 0 25%,
    rgba(0, 21, 209, 0.65) 25% 50%
  );
  opacity: 0.85;
  animation: sds-btnBlinds var(--sds-duration-base, 0.8s) steps(4) both;
}
@keyframes sds-btnBlinds {
  0% {
    clip-path: inset(0 0 0 0);
    opacity: 0.85;
  }
  99% {
    clip-path: inset(0 0 0 100%);
    opacity: 0.5;
  }
  100% {
    clip-path: inset(0 0 0 100%);
    opacity: 0;
  }
}
@keyframes sds-btnBlindsHost {
  0% {
    opacity: 0;
    transform: scale(0.97);
  }
  35% {
    opacity: 1;
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* 109 · Guillotine ------------------------------------------ */
.sds-btn-guillotine {
  animation: sds-btnGuillotine var(--sds-duration-base, 0.8s) var(--sds-ease-emphasized, cubic-bezier(0.215, 0.61, 0.355, 1)) both;
}
@keyframes sds-btnGuillotine {
  0% {
    opacity: 0;
    clip-path: inset(0 0 50% 0);
    transform: translateY(-10px);
  }
  34% {
    opacity: 1;
    clip-path: inset(0 0 50% 0);
    transform: translateY(-2px);
  }
  52% {
    clip-path: inset(0 0 0 0);
    transform: translateY(2px) scale(1.03, 0.95);
  }
  70% {
    transform: translateY(-1px) scale(0.99, 1.02);
  }
  100% {
    opacity: 1;
    clip-path: inset(0 0 0 0);
    transform: translateY(0) scale(1, 1);
  }
}

/* 110 · Shutter Snap ---------------------------------------- */
.sds-btn-shutter-snap {
  animation: sds-btnShutterSnap var(--sds-duration-slower, 2.2s) var(--sds-ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1)) infinite;
}
@keyframes sds-btnShutterSnap {
  0%,
  16% {
    clip-path: polygon(50% -60%, 160% 50%, 50% 160%, -60% 50%);
    transform: scale(1);
  }
  34% {
    clip-path: polygon(50% 38%, 62% 50%, 50% 62%, 38% 50%);
    transform: scale(0.98);
  }
  40% {
    clip-path: polygon(50% 34%, 66% 50%, 50% 66%, 34% 50%);
  }
  58% {
    clip-path: polygon(50% -75%, 175% 50%, 50% 175%, -75% 50%);
    transform: scale(1.02);
  }
  70%,
  100% {
    clip-path: polygon(50% -60%, 160% 50%, 50% 160%, -60% 50%);
    transform: scale(1);
  }
}

/* ─── Family: Icon & Label Orchestration (child spans) ─────── */

/* 111 · Label Slide ----------------------------------------- */
.sds-btn-label-slide {
  overflow: hidden;
}
.sds-btn-label-slide > * {
  display: inline-block;
  animation: sds-btnLabelSlide var(--sds-duration-dramatic, 3s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
@keyframes sds-btnLabelSlide {
  0%,
  62% {
    transform: translateY(0);
    opacity: 1;
  }
  70% {
    transform: translateY(-130%);
    opacity: 0;
  }
  70.1% {
    transform: translateY(130%);
    opacity: 0;
  }
  80% {
    transform: translateY(-6%);
    opacity: 1;
  }
  88%,
  100% {
    transform: translateY(0);
  }
}

/* 112 · Label Wave ------------------------------------------ */
.sds-btn-label-wave > * {
  display: inline-block;
  animation: sds-btnLabelWave var(--sds-duration-slower, 2.2s) ease-in-out infinite;
}
.sds-btn-label-wave > *:nth-child(2) { animation-delay: 0.09s; }
.sds-btn-label-wave > *:nth-child(3) { animation-delay: 0.18s; }
.sds-btn-label-wave > *:nth-child(4) { animation-delay: 0.27s; }
.sds-btn-label-wave > *:nth-child(5) { animation-delay: 0.36s; }
.sds-btn-label-wave > *:nth-child(6) { animation-delay: 0.45s; }
@keyframes sds-btnLabelWave {
  0%,
  30%,
  100% {
    transform: translateY(0) rotate(0);
  }
  10% {
    transform: translateY(-2px) rotate(-2deg);
  }
  20% {
    transform: translateY(1px) rotate(1.4deg);
  }
}

/* 113 · Icon Launch ----------------------------------------- */
.sds-btn-icon-launch > *:first-child {
  display: inline-block;
  animation: sds-btnIconLaunch var(--sds-duration-slower, 2.2s) var(--sds-ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1)) infinite;
}
.sds-btn-icon-launch > *:last-child {
  display: inline-block;
  animation: sds-btnIconLaunchLabel var(--sds-duration-slower, 2.2s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
@keyframes sds-btnIconLaunch {
  0%,
  22% {
    transform: translateX(0);
    filter: blur(0);
  }
  36% {
    transform: translateX(-2px);
    filter: blur(0);
  }
  48% {
    transform: translateX(6px);
    filter: blur(1.5px);
  }
  62% {
    transform: translateX(4px);
    filter: blur(0);
  }
  76%,
  100% {
    transform: translateX(0);
  }
}
@keyframes sds-btnIconLaunchLabel {
  0%,
  40% {
    transform: skewX(0deg) translateX(0);
  }
  54% {
    transform: skewX(-4deg) translateX(1.5px);
  }
  70%,
  100% {
    transform: skewX(0deg) translateX(0);
  }
}

/* 114 · Icon Spin Settle ------------------------------------ */
.sds-btn-icon-spin-settle > *:first-child {
  display: inline-block;
  animation: sds-btnIconSpinSettle var(--sds-duration-slower, 2.2s) var(--sds-ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1)) infinite;
}
.sds-btn-icon-spin-settle > *:last-child {
  display: inline-block;
  animation: sds-btnIconSpinLabel var(--sds-duration-slower, 2.2s) ease-in-out infinite;
}
@keyframes sds-btnIconSpinSettle {
  0%,
  20% {
    transform: rotate(0deg);
  }
  56% {
    transform: rotate(380deg);
  }
  68% {
    transform: rotate(356deg);
  }
  78%,
  100% {
    transform: rotate(360deg);
  }
}
@keyframes sds-btnIconSpinLabel {
  0%,
  20%,
  78%,
  100% {
    transform: scaleX(1);
  }
  50% {
    transform: scaleX(0.98);
  }
}

/* 115 · Swap Flip ------------------------------------------- */
.sds-btn-swap-flip > *:first-child {
  display: inline-block;
  animation: sds-btnSwapFlipA var(--sds-duration-dramatic, 3s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
.sds-btn-swap-flip > *:last-child {
  display: inline-block;
  animation: sds-btnSwapFlipB var(--sds-duration-dramatic, 3s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
@keyframes sds-btnSwapFlipA {
  0%,
  30% {
    transform: translateX(0);
    opacity: 1;
  }
  46% {
    transform: translateX(14px) translateY(-4px);
    opacity: 0.55;
  }
  62%,
  76% {
    transform: translateX(0);
    opacity: 1;
  }
  100% {
    transform: translateX(0);
  }
}
@keyframes sds-btnSwapFlipB {
  0%,
  30% {
    transform: translateX(0);
    opacity: 1;
  }
  46% {
    transform: translateX(-14px) translateY(4px);
    opacity: 0.55;
  }
  62%,
  76% {
    transform: translateX(0);
    opacity: 1;
  }
  100% {
    transform: translateX(0);
  }
}

/* 116 · Label Typewrite ------------------------------------- */
.sds-btn-label-typewrite > * {
  display: inline-block;
  animation: sds-btnLabelTypewrite var(--sds-duration-slower, 2.2s) steps(2) infinite;
}
.sds-btn-label-typewrite > *:nth-child(2) { animation-delay: 0.12s; }
.sds-btn-label-typewrite > *:nth-child(3) { animation-delay: 0.24s; }
.sds-btn-label-typewrite > *:nth-child(4) { animation-delay: 0.36s; }
.sds-btn-label-typewrite > *:nth-child(5) { animation-delay: 0.48s; }
.sds-btn-label-typewrite > *:nth-child(6) { animation-delay: 0.6s; }
.sds-btn-label-typewrite > *:nth-child(7) { animation-delay: 0.72s; }
.sds-btn-label-typewrite > *:nth-child(8) { animation-delay: 0.84s; }
@keyframes sds-btnLabelTypewrite {
  0% {
    opacity: 0;
    transform: translateY(2px);
  }
  12%,
  86% {
    opacity: 1;
    transform: translateY(0);
  }
  93% {
    opacity: 0.4;
  }
  100% {
    opacity: 0;
  }
}

/* 117 · Nudge ----------------------------------------------- */
.sds-btn-nudge > *:last-child {
  display: inline-block;
  animation: sds-btnNudge var(--sds-duration-slower, 2.2s) var(--sds-ease-emphasized, cubic-bezier(0.215, 0.61, 0.355, 1)) infinite;
}
@keyframes sds-btnNudge {
  0%,
  40%,
  76%,
  100% {
    transform: translateX(0);
  }
  50% {
    transform: translateX(5px);
  }
  60% {
    transform: translateX(0);
  }
  66% {
    transform: translateX(2.5px);
  }
}

/* ─── Family: CSS-only Magnetic Tilt ───────────────────────── */

/* 118 · Tilt Orbit ------------------------------------------ */
.sds-btn-tilt-orbit {
  will-change: transform;
  animation: sds-btnTiltOrbit var(--sds-duration-dramatic, 3s) ease-in-out infinite;
}
@keyframes sds-btnTiltOrbit {
  0%,
  100% {
    transform: perspective(420px) rotateX(4deg) rotateY(0deg);
  }
  25% {
    transform: perspective(420px) rotateX(0deg) rotateY(5deg);
  }
  50% {
    transform: perspective(420px) rotateX(-4deg) rotateY(0deg);
  }
  75% {
    transform: perspective(420px) rotateX(0deg) rotateY(-5deg);
  }
}

/* 119 · Tilt Pendulum --------------------------------------- */
.sds-btn-tilt-pendulum {
  transform-origin: top center;
  animation: sds-btnTiltPendulum var(--sds-duration-dramatic, 3s) ease-in-out infinite;
}
@keyframes sds-btnTiltPendulum {
  0%,
  100% {
    transform: rotate(0deg);
  }
  14% {
    transform: rotate(4deg);
  }
  32% {
    transform: rotate(-3deg);
  }
  48% {
    transform: rotate(2deg);
  }
  62% {
    transform: rotate(-1.2deg);
  }
  74% {
    transform: rotate(0.5deg);
  }
  84% {
    transform: rotate(0deg);
  }
}

/* 120 · Tilt Scan ------------------------------------------- */
.sds-btn-tilt-scan {
  animation: sds-btnTiltScan var(--sds-duration-dramatic, 3s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
@keyframes sds-btnTiltScan {
  0%,
  10% {
    transform: perspective(420px) rotateX(3deg) rotateY(-4deg);
  }
  24%,
  36% {
    transform: perspective(420px) rotateX(3deg) rotateY(4deg);
  }
  50%,
  62% {
    transform: perspective(420px) rotateX(-3deg) rotateY(4deg);
  }
  74%,
  86% {
    transform: perspective(420px) rotateX(-3deg) rotateY(-4deg);
  }
  100% {
    transform: perspective(420px) rotateX(3deg) rotateY(-4deg);
  }
}

/* 121 · Tilt Float ------------------------------------------ */
.sds-btn-tilt-float {
  animation: sds-btnTiltFloat var(--sds-duration-dramatic, 3s) ease-in-out infinite;
}
@keyframes sds-btnTiltFloat {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
    filter: drop-shadow(0 3px 3px rgba(0, 21, 209, 0.18));
  }
  35% {
    transform: translateY(-5px) rotate(1.2deg);
    filter: drop-shadow(0 10px 8px rgba(0, 21, 209, 0.12));
  }
  65% {
    transform: translateY(-3px) rotate(-0.8deg);
    filter: drop-shadow(0 7px 6px rgba(0, 21, 209, 0.14));
  }
}

/* ─── Family: Sheen & Spotlight Overlays ───────────────────── */

/* 122 · Sheen Pass ------------------------------------------ */
.sds-btn-sheen-pass {
  position: relative;
  overflow: hidden;
}
.sds-btn-sheen-pass::before {
  content: "";
  position: absolute;
  top: -20%;
  bottom: -20%;
  left: 0;
  width: 34%;
  background: rgba(255, 255, 255, 0.45);
  filter: blur(6px);
  transform: translateX(-180%) skewX(-20deg);
  animation: sds-btnSheenPass var(--sds-duration-slower, 2.2s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
@keyframes sds-btnSheenPass {
  0%,
  18% {
    transform: translateX(-180%) skewX(-20deg);
    opacity: 0;
  }
  30% {
    opacity: 1;
  }
  48% {
    transform: translateX(180%) skewX(-20deg);
    opacity: 1;
  }
  60%,
  100% {
    transform: translateX(320%) skewX(-20deg);
    opacity: 0;
  }
}

/* 123 · Sheen Double ---------------------------------------- */
.sds-btn-sheen-double {
  position: relative;
  overflow: hidden;
}
.sds-btn-sheen-double::before,
.sds-btn-sheen-double::after {
  content: "";
  position: absolute;
  top: -20%;
  bottom: -20%;
  width: 26%;
  background: rgba(255, 255, 255, 0.38);
  filter: blur(5px);
}
.sds-btn-sheen-double::before {
  left: 0;
  transform: translateX(-200%) skewX(-18deg);
  animation: sds-btnSheenDoubleA var(--sds-duration-slower, 2.2s) ease-in-out infinite;
}
.sds-btn-sheen-double::after {
  right: 0;
  transform: translateX(200%) skewX(18deg);
  animation: sds-btnSheenDoubleB var(--sds-duration-slower, 2.2s) ease-in-out infinite;
}
@keyframes sds-btnSheenDoubleA {
  0%,
  14% {
    transform: translateX(-200%) skewX(-18deg);
    opacity: 0;
  }
  26% {
    opacity: 1;
  }
  44% {
    transform: translateX(190%) skewX(-18deg);
    opacity: 1;
    filter: blur(5px) brightness(1.5);
  }
  58%,
  100% {
    transform: translateX(420%) skewX(-18deg);
    opacity: 0;
  }
}
@keyframes sds-btnSheenDoubleB {
  0%,
  14% {
    transform: translateX(200%) skewX(18deg);
    opacity: 0;
  }
  26% {
    opacity: 1;
  }
  44% {
    transform: translateX(-190%) skewX(18deg);
    opacity: 1;
    filter: blur(5px) brightness(1.5);
  }
  58%,
  100% {
    transform: translateX(-420%) skewX(18deg);
    opacity: 0;
  }
}

/* 124 · Prism Edge ------------------------------------------ */
.sds-btn-prism-edge {
  position: relative;
}
.sds-btn-prism-edge::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1.5px solid var(--sds-primary);
  animation: sds-btnPrismEdge var(--sds-duration-dramatic, 3s) linear infinite;
}
@keyframes sds-btnPrismEdge {
  0% {
    filter: hue-rotate(0deg) brightness(1.1);
    clip-path: inset(0 0 0 0);
    opacity: 0.9;
  }
  25% {
    filter: hue-rotate(90deg) brightness(1.3);
    clip-path: inset(0 0 55% 0);
  }
  50% {
    filter: hue-rotate(180deg) brightness(1.1);
    clip-path: inset(0 0 0 0);
    opacity: 0.65;
  }
  75% {
    filter: hue-rotate(270deg) brightness(1.3);
    clip-path: inset(55% 0 0 0);
  }
  100% {
    filter: hue-rotate(360deg) brightness(1.1);
    clip-path: inset(0 0 0 0);
    opacity: 0.9;
  }
}

/* 125 · Night Sweep ----------------------------------------- */
.sds-btn-night-sweep {
  position: relative;
  overflow: hidden;
}
.sds-btn-night-sweep::after {
  content: "";
  position: absolute;
  inset: 0;
  background: #06060c;
  opacity: 0.55;
  animation: sds-btnNightSweep var(--sds-duration-dramatic, 3s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
@keyframes sds-btnNightSweep {
  0%,
  12% {
    clip-path: inset(0 0 0 0);
    opacity: 0.55;
  }
  46% {
    clip-path: inset(0 0 0 100%);
    opacity: 0.45;
  }
  56%,
  72% {
    clip-path: inset(0 0 0 100%);
    opacity: 0;
  }
  84% {
    clip-path: inset(0 0 0 0);
    opacity: 0.3;
  }
  100% {
    clip-path: inset(0 0 0 0);
    opacity: 0.55;
  }
}

/* 126 · Spotlight Pan --------------------------------------- */
.sds-btn-spotlight-pan {
  position: relative;
  overflow: hidden;
}
.sds-btn-spotlight-pan::before {
  content: "";
  position: absolute;
  top: -75%;
  left: -25%;
  width: 90%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.4) 0%, rgba(255, 255, 255, 0) 65%);
  animation: sds-btnSpotlightPan var(--sds-duration-dramatic, 3s) ease-in-out infinite;
}
@keyframes sds-btnSpotlightPan {
  0%,
  100% {
    transform: translate(-30%, 0);
    opacity: 0.4;
  }
  50% {
    transform: translate(130%, 55%);
    opacity: 1;
  }
}

/* ─── Family: Attention Rhythms ────────────────────────────── */

/* 127 · Beacon ---------------------------------------------- */
.sds-btn-beacon {
  position: relative;
}
.sds-btn-beacon::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1.5px solid var(--sds-primary);
  opacity: 0;
  animation: sds-btnBeacon var(--sds-duration-slower, 2.2s) var(--sds-ease-decelerate, cubic-bezier(0.16, 1, 0.3, 1)) infinite;
}
@keyframes sds-btnBeacon {
  0%,
  58% {
    transform: scale(1);
    opacity: 0;
  }
  62% {
    opacity: 0.8;
    transform: scale(1);
  }
  88%,
  100% {
    transform: scale(1.28, 1.65);
    opacity: 0;
  }
}

/* 128 · Tick Tock ------------------------------------------- */
.sds-btn-tick-tock {
  animation: sds-btnTickTock var(--sds-duration-slower, 2.2s) var(--sds-ease-emphasized, cubic-bezier(0.215, 0.61, 0.355, 1)) infinite;
}
@keyframes sds-btnTickTock {
  0%,
  8% {
    transform: rotate(-1.5deg) scale(1);
  }
  25%,
  33% {
    transform: rotate(1.5deg) scale(1);
  }
  50%,
  58% {
    transform: rotate(-1.5deg) scale(1);
  }
  75%,
  80% {
    transform: rotate(1.5deg) scale(1);
  }
  90% {
    transform: rotate(0deg) scale(1.04);
  }
  100% {
    transform: rotate(-1.5deg) scale(1);
  }
}

/* 129 · Breath Hold ----------------------------------------- */
.sds-btn-breath-hold {
  animation: sds-btnBreathHold var(--sds-duration-dramatic, 3s) var(--sds-ease-standard, cubic-bezier(0.22, 1, 0.36, 1)) infinite;
}
@keyframes sds-btnBreathHold {
  0%,
  10% {
    transform: scale(1);
    filter: brightness(1);
  }
  42% {
    transform: scale(1.03);
    filter: brightness(1.09);
  }
  58% {
    transform: scale(1.03);
    filter: brightness(1.09);
  }
  70% {
    transform: scale(0.995);
    filter: brightness(0.98);
  }
  80%,
  100% {
    transform: scale(1);
    filter: brightness(1);
  }
}

/* 130 · Wink ------------------------------------------------ */
.sds-btn-wink {
  position: relative;
  overflow: hidden;
}
.sds-btn-wink::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 38%;
  height: 60%;
  background: rgba(255, 255, 255, 0.5);
  filter: blur(7px);
  clip-path: polygon(35% 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0;
  animation: sds-btnWink var(--sds-duration-dramatic, 3s) steps(1) infinite;
}
@keyframes sds-btnWink {
  0%,
  72% {
    opacity: 0;
    transform: translateX(0);
  }
  76% {
    opacity: 0.85;
    transform: translateX(-8%);
  }
  80% {
    opacity: 0;
    transform: translateX(0);
  }
  84% {
    opacity: 0.5;
    transform: translateX(-4%);
  }
  88%,
  100% {
    opacity: 0;
  }
}