@keyframes animate {
  0% {
    transform: scale(0.5);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: scale(1.2);
    opacity: 0;
  }
}

.callback-container,
.callback-container *,
.callback-container :before,
.callback-container :after,
.callback-modal,
.callback-modal *,
.callback-modal :before,
.callback-modal :after {
  box-sizing: border-box;
  outline: none;
}

.callback-container {
  position: fixed;
  bottom: 50px;
  left: 50px;
  z-index: 99999999;
}
.callback-container__inner {
  margin-bottom: 15px;
}

.callback-btn {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  font-size: 60px;
  text-align: center;
  cursor: pointer;
}
.callback-btn + .callback-btn {
  margin-top: 15px;
}

.callback-btn a,
.callback-btn a:hover,
.callback-btn a:focus,
.callback-btn a:active {
  text-decoration: none;
  color: inherit;
}

.callback-btn-sendmessage,
.callback-btn-open {
  background: #84a946;
  color: #fff;
}
.callback-btn-open:before,
.callback-btn-open:after {
  content: " ";
  display: block;
  position: absolute;
  top: -20px;
  right: -20px;
  bottom: -20px;
  left: -20px;
  border: 1px solid #84a946;
  border-radius: 50%;
  animation: animate 1.5s linear infinite;
}

.callback-btn-close {
  background: #d6d6d6;
  color: #fff;
}
.callback-btn-close svg {
  width: 40px;
  height: 40px;
}

.callback-btn-vk {
  background: #3871BA;
  color: #fff;
}

.callback-container.open .callback-btn-open {
  display: none;
}
.callback-container:not(.open) .callback-container__inner,
.callback-container:not(.open) .callback-btn-close {
  display: none;
}

.callback-modal {
  display: none;
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 99999999;
}
.callback-modal.active {
  display: block;
}
.callback-modal__outer {
  width: 100%;
  height: 100%;
  background: #000;
  opacity: .5;
}
.callback-modal__close {
  position: absolute;
  top: 3px;
  right: 10px;
  font-size: 40px;
  cursor: pointer;
  color: #ccc;
}
.callback-modal__close:hover {
  color: #000;
}
.callback-modal__window {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  max-width: 350px;
}
.callback-modal_container {
  padding: 40px;
  border: 1px solid #84a946;
  border-radius: 3px;
  font-family: Arial, sans-serif;
  background: #fff;
}
.callback-modal__form {
  display: none;
}
.callback-modal__form.active {
  display: block;
}
.callback-modal__title {
  margin-bottom: 20px;
  font-size: 20px;
  font-weight: 500;
  text-align: center;
}
.callback-modal__logo {
  font-size: 16px;
  text-align: center;
}
.callback-field {
  margin: 0 0 20px;
}
.callback-field:last-child{
  margin-bottom: 0;
}
.callback-field__label {
  display: block;
  margin: 0 0 5px;
}
.callback-field__input {
  display: block;
  padding: 0 10px;
  width: 100%;
  height: 40px;
  border: 1px solid #ccc;
  border-radius: 3px;
  line-height: 40px;
}
.callback-field__textarea {
  display: block;
  padding: 5px 10px;
  width: 100%;
  height: 100px;
  border: 1px solid #ccc;
  border-radius: 3px;
}
.callback-modal__btn-submit,
.callback-modal__btn-success {
  display: block;
  margin: 0 auto;
  padding: 0 40px;
  height: 40px;
  border: 1px solid #ccc;
  border-radius: 3px;
  line-height: 40px;
  background: #84a946;
  color: #fff;
  cursor: pointer;
}
.callback-modal__btn-submit:hover {
  opacity: .8;
}
.callback-modal__success {
  display: none;
}
.callback-modal__success.active {
  display: block;
}

@media (max-width: 768px) {
  .callback-container {
    bottom: 25px;
    left: 25px;
  }
  .callback-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 30px;
  }
}

@media (max-width: 350px) {
  .callback-modal_container {
    padding-left: 20px;
    padding-right: 20px;
  }
  .callback-btn-close svg {
    width: 20px;
    height: 20px;
  }
}