/* ===== Ripple (state layer) =====
   Use .ripple on a positioned element; pseudo on click via JS or :active fallback */
.ripple { position: relative; overflow: hidden; }
.ripple::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at var(--rx, 50%) var(--ry, 50%),
              color-mix(in oklab, currentColor 20%, transparent) 0%,
              transparent 60%);
  opacity: 0;
  transition: opacity var(--dur-3) var(--ease-standard);
  pointer-events: none;
}
.ripple:active::after { opacity: 1; transition: none; }

/* ===== Shimmer for AI loading ===== */
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
.shimmer {
  background: linear-gradient(90deg,
    var(--md-surface-container) 0%,
    var(--md-surface-container-high) 50%,
    var(--md-surface-container) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.6s linear infinite;
}

/* ===== Gemini sparkle ===== */
@keyframes sparkle-rot {
  0%, 100% { transform: rotate(0deg) scale(1); opacity: 1; }
  50% { transform: rotate(180deg) scale(1.15); opacity: .75; }
}
.sparkle { animation: sparkle-rot 2.4s var(--ease-emph) infinite; transform-origin: center; }

@keyframes gemini-pulse {
  0%, 100% { transform: scale(1); filter: hue-rotate(0deg); }
  50%      { transform: scale(1.04); filter: hue-rotate(20deg); }
}
.gemini-pulse { animation: gemini-pulse 3s var(--ease-emph) infinite; }

@keyframes gemini-flow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
.gemini-flow {
  background: linear-gradient(120deg, #4285F4, #9B72CB, #D96570, #F9AB00, #4285F4);
  background-size: 300% 300%;
  animation: gemini-flow 6s linear infinite;
}

/* ===== Scan line (barcode) ===== */
@keyframes scan-bounce {
  0%   { transform: translateY(0%); opacity: 1; }
  45%  { transform: translateY(380%); opacity: 1; }
  50%  { transform: translateY(400%); opacity: .3; }
  55%  { transform: translateY(380%); opacity: 1; }
  100% { transform: translateY(0%); opacity: 1; }
}
.scan-line {
  animation: scan-bounce 2.4s var(--ease-emph) infinite;
}

/* ===== Mic listening (concentric waves) ===== */
@keyframes mic-wave {
  0% { transform: scale(1); opacity: .6; }
  100% { transform: scale(2.4); opacity: 0; }
}
.mic-wave {
  position: absolute; inset: 0;
  border-radius: 999px;
  background: currentColor;
  opacity: .35;
  animation: mic-wave 1.8s var(--ease-emph-decel) infinite;
}
.mic-wave.delay-1 { animation-delay: .3s; }
.mic-wave.delay-2 { animation-delay: .6s; }

/* ===== FAB entrance ===== */
@keyframes fab-in {
  0%   { transform: scale(0) rotate(-30deg); opacity: 0; }
  100% { transform: scale(1) rotate(0); opacity: 1; }
}
.fab-in { animation: fab-in var(--dur-4) var(--ease-spring) both; }

/* ===== Card slide-up entrance ===== */
@keyframes card-up {
  0%   { transform: translateY(16px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}
.card-up { animation: card-up var(--dur-5) var(--ease-emph-decel) both; }
.stagger-1 { animation-delay: 50ms; }
.stagger-2 { animation-delay: 100ms; }
.stagger-3 { animation-delay: 150ms; }
.stagger-4 { animation-delay: 200ms; }
.stagger-5 { animation-delay: 250ms; }
.stagger-6 { animation-delay: 300ms; }
.stagger-7 { animation-delay: 350ms; }

/* ===== Hero bar entrance ===== */
@keyframes hero-in {
  0%   { opacity: 0; transform: translateY(-12px); }
  100% { opacity: 1; transform: translateY(0); }
}
.hero-in { animation: hero-in var(--dur-5) var(--ease-emph-decel) both; }

/* ===== Page transition (shared axis Y) ===== */
@keyframes page-in {
  0%   { transform: translateY(28px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}
.page-in { animation: page-in var(--dur-5) var(--ease-emph-decel) both; }

/* ===== Number ticker / count ===== */
@keyframes pop {
  0% { transform: scale(.6); opacity: 0; }
  60% { transform: scale(1.06); opacity: 1; }
  100% { transform: scale(1); }
}
.pop { animation: pop var(--dur-4) var(--ease-spring) both; }

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}