.chrome-btn-container {
  width: 320px;
  height: 140px;
  border-radius: 70px;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  
  outline: none;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  touch-action: manipulation;

  transition: transform .1s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow .1s ease;
  box-shadow:
    inset 0 6px 12px rgba(255,255,255,.9),
    inset 0 -8px 14px rgba(0,0,0,.25),
    0 20px 40px rgba(0,0,0,.3);
  z-index: 1;
}

.chrome-btn-container.is-pressed {
  transform: translateY(4px) scale(.97);
  box-shadow:
    inset 0 3px 6px rgba(255,255,255,.6),
    inset 0 -4px 8px rgba(0,0,0,.35),
    0 8px 18px rgba(0,0,0,.25);
}

.chrome-canvas {
  width: 100%;
  height: 100%;
  display: block;
  background: #ccc;
}

.chrome-label {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 32px;
  font-weight: 700;
  color: #cfcfcf;
  pointer-events: none;
  mix-blend-mode: overlay;
  text-shadow: 1px 1px 2px rgba(255,255,255,.9), -1px -1px 2px rgba(0,0,0,.5);
}

.chrome-fingerprint {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(255,255,255,0.95), transparent 70%);
  opacity: 0;
  pointer-events: none;
}

.chrome-btn-container.animating-fp .chrome-fingerprint {
  animation: heat-up 5s ease-out forwards;
}

@keyframes heat-up {
  0% { opacity: 1; filter: blur(0); }
  100% { opacity: 0; filter: blur(8px); }
}

.chrome-hit-line {
  position: absolute;
  width: 2px;
  height: 100%;
  background: white;
  top: 0;
  opacity: 0;
  pointer-events: none;
}

.chrome-hit-line.active {
  animation: flash 0.4s ease-out;
}

@keyframes flash {
  0% { opacity: 1; }
  100% { opacity: 0; }
}