.heading-3d {
  text-transform: uppercase;
  font-weight: 900;
  background: linear-gradient(to bottom,
      #35A2FC 0%,
      #0053AD 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  -webkit-text-stroke: 2px #FFFFFF;
  text-shadow: 0 4px 8px rgba(0, 0, 0, 0.25);
}

.form_book .input-group input[type="text"],
.form_book .input-group input[type="email"],
.form_book .input-group input[type="tel"],
 .form_book .input-group input[type="number"] {
  border: 2px solid #ebce8a !important;
  padding: 8px 12px !important;
  border-radius: 8px !important;
  width: 100%;
  display: block !important;
  box-shadow: none !important;
  margin-bottom: 0 !important;
  text-transform: uppercase !important;
  font-weight: 600 !important;
  height: auto !important;
}

.background-form-buy {
  background-size: 100% 100% !important;
  background-repeat: no-repeat !important;
  background: url('../images/bg_form.png');

}

.btn_sub {
  background-size: 100% 100% !important;
  background-repeat: no-repeat !important;
  background: url('../images/button.png');
  margin-bottom: 0 !important;
  margin-right: 0 !important;
  height: 80px;
  width: 300px;
  font-weight: 600;
  color: #FFFFFF !important;
  font-size: 22px !important;
  line-height: 1 !important;
  animation: blink 1.5s ease-in-out infinite;
}

.btn_sub:hover {
  filter: drop-shadow(0 4px 15px rgba(0, 0, 0, 0.25));
  transition: all 0.3s ease-in-out;
}
.-bottom-\[7\.5rem\] {
    bottom: -7.5rem /* -120px */;
}
.des_form::before {
  content: '';
  width: 24px;
  height: 20px;
  background: url('../images/cart.png');
  background-repeat: no-repeat;
  background-size: contain;
}
.title_ {
  text-transform: uppercase;
  font-weight: 900;
  /* CHỈ GIỮ BÓNG TỐI */
  text-shadow: 0 4px 8px rgba(0, 0, 0, 0.25);
}

.title_ {
  background-size: 100% 100% !important;
  background-repeat: no-repeat !important;
  background: url('../images/bg_text.png');
  height: 140px;
  display: flex;
  justify-content: center;
  align-items: center;

}

.title_gift::after {
  content: '';
  display: block;
  width: 82px;
  height: 82px;
  background: url('../images/chim1\ \(2\).png');
  background-repeat: no-repeat;
  background-size: contain;


}

.title_gift::before {
  content: '';
  display: block;
  width: 82px;
  height: 82px;
  background: url('../images/chim1\ \(1\).png');
  background-repeat: no-repeat;
  background-size: contain;
}

.text-gift {
  font-size: 80px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 2px;
  background: linear-gradient(180deg,rgba(124, 192, 247, 1) 3%, rgba(53, 162, 252, 1) 37%, rgba(53, 103, 252, 1) 94%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  -webkit-text-stroke: 2px rgba(255, 255, 255, 0.9);
  text-shadow:
    0 6px 10px rgba(0, 0, 0, 0.3);
}

.title_gift_box {
  /* Gradient chữ */
  background: linear-gradient(to bottom,
      #93abf8 0%,
      #2083DD 50%,
      #1A7CD6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;

  -webkit-text-stroke: 2px rgba(255, 255, 255, 0.9);

  text-shadow:
    0 6px 10px rgba(0, 0, 0, 0.3);
}

.gift_box {
  background-size: 100% 100% !important;
  background-repeat: no-repeat !important;
  background: url('../images/box.png');
}

.btn_buy {
  background-size: 100% 100% !important;
  background-repeat: no-repeat !important;
  background: url('../images/button.png');
  animation: blink 1.5s ease-in-out infinite;
  margin: 0 auto;
}

.btn_buy:hover {
  filter: drop-shadow(0 4px 15px rgba(0, 0, 0, 0.25));
  transition: all 0.3s ease-in-out;
  color: #FFFFFF !important;
}

@keyframes blink {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }
}

@media (min-width: 768px) {
  .gift::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: -75px;
    background: url(../images/hoa2_v2.png);
    width: 320px;
    height: 195px;
    background-repeat: no-repeat;
    background-size: contain;
    z-index: 1;
  }

  .gift::before {
    content: '';
    position: absolute;
    top: 20%;
    right: -125px;
    background: url(../images/hoa1.png);
    width: 320px;
    height: 195px;
    background-repeat: no-repeat;
    background-size: contain;
    z-index: 1;
  }
}

@media (max-width: 768px) {
  .background-form-buy {
    border-radius: 20px;
    background: #fff4d2;

  }
}