.call-btn {
  position: fixed;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 999999;
  text-decoration: none;
  display: flex;
  align-items: center;
}

.inner-btn {
  background: #ee2d24; /* Màu đỏ của hãng */
  padding: 8px 25px 8px 8px;
  border-radius: 50px;
  display: flex;
  align-items: center;
  box-shadow: 0 5px 15px rgba(0,0,0,0.3);
  position: relative;
  z-index: 2;
}

/* Icon tròn bên trái */
.icon-box {
  width: 45px;
  height: 45px;
  background: #c31d16; /* Màu đỏ đậm hơn một chút */
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: quickShake 0.5s infinite;
}

.text-box {
  display: flex;
  flex-direction: column;
  margin-left: 12px;
  color: white;
  font-family: Arial, sans-serif;
}

.small-txt {
  font-size: 12px;
  line-height: 1.2;
}

.main-txt {
  font-size: 15px;
  font-weight: bold;
  line-height: 1.2;
  white-space: nowrap;
}

/* Hiệu ứng vòng tròn lan tỏa */
.zoom-in-out {
  position: absolute;
  width: 60px;
  height: 60px;
  background: rgba(238, 45, 36, 0.4);
  border-radius: 50%;
  left: 2px; /* Căn chỉnh đè lên icon */
  top: 50%;
  transform: translateY(-50%);
  animation: pulseRipple 2s infinite;
  z-index: 1;
}

/* Keyframes rung Icon */
@keyframes quickShake {
  0% { transform: rotate(0); }
  25% { transform: rotate(15deg); }
  50% { transform: rotate(-15deg); }
  75% { transform: rotate(10deg); }
  100% { transform: rotate(0); }
}

/* Keyframes vòng lan tỏa */
@keyframes pulseRipple {
  0% {
    transform: translateY(-50%) scale(0.8);
    opacity: 0.8;
  }
  100% {
    transform: translateY(-50%) scale(2.2);
    opacity: 0;
  }
}