/* logo animation */
.sparkle-text {
   position: relative;
   display: inline-block;
   font-weight: bold;
   font-size: 24px;
   color: #fff; /* Màu chữ */
   transition: text-shadow 0.3s ease-in-out;
}

.sparkle-text:hover {
   text-shadow: 0 0 5px #b2f5ea, 0 0 10px #c1fff7, 0 0 15px #cffdf9, 0 0 20px #bff1ef, 0 0 30px #319795;
}

/* Hạt lấp lánh */
.sparkle-text::before,
.sparkle-text::after {
   content: "";
   position: absolute;
   width: 10px;
   height: 10px;
   background: radial-gradient(circle, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 0) 70%);
   border-radius: 50%;
   opacity: 0;
   pointer-events: none;
}

.sparkle-text::before {
   top: -10px;
   left: 10%;
   animation: sparkle-move 1.5s infinite;
}

.sparkle-text::after {
   bottom: -10px;
   right: 10%;
   animation: sparkle-move 1.5s infinite 0.5s;
}

@keyframes sparkle-move {
   0% {
      opacity: 0;
      transform: scale(0.5) translateY(0);
   }
   50% {
      opacity: 1;
      transform: scale(1) translateY(-10px);
   }
   100% {
      opacity: 0;
      transform: scale(0.5) translateY(0);
   }
}

/* background animation */
.circles {
   position: absolute;
   top: 0;
   left: 0;
   width: 100%;
   height: 100%;
   overflow: hidden;
}
.circles li {
   position: absolute;
   display: block;
   list-style: none;
   width: 20px;
   height: 20px;
   background: rgba(255, 255, 255, 0.2);
   animation: animate 25s linear infinite;
   bottom: -150px;
}
.circles li:nth-child(1) {
   left: 25%;
   width: 80px;
   height: 80px;
   animation-delay: 0s;
}

.circles li:nth-child(2) {
   left: 10%;
   width: 20px;
   height: 20px;
   animation-delay: 2s;
   animation-duration: 12s;
}

.circles li:nth-child(3) {
   left: 70%;
   width: 20px;
   height: 20px;
   animation-delay: 4s;
}

.circles li:nth-child(4) {
   left: 40%;
   width: 60px;
   height: 60px;
   animation-delay: 0s;
   animation-duration: 18s;
}

.circles li:nth-child(5) {
   left: 65%;
   width: 20px;
   height: 20px;
   animation-delay: 0s;
}

.circles li:nth-child(6) {
   left: 75%;
   width: 110px;
   height: 110px;
   animation-delay: 3s;
}

.circles li:nth-child(7) {
   left: 35%;
   width: 150px;
   height: 150px;
   animation-delay: 7s;
}

.circles li:nth-child(8) {
   left: 50%;
   width: 25px;
   height: 25px;
   animation-delay: 15s;
   animation-duration: 45s;
}

.circles li:nth-child(9) {
   left: 20%;
   width: 15px;
   height: 15px;
   animation-delay: 2s;
   animation-duration: 35s;
}

.circles li:nth-child(10) {
   left: 85%;
   width: 150px;
   height: 150px;
   animation-delay: 0s;
   animation-duration: 11s;
}
@keyframes animate {
   0% {
      transform: translateY(0) rotate(0deg);
      opacity: 1;
      border-radius: 0;
   }

   100% {
      transform: translateY(-1000px) rotate(720deg);
      opacity: 0;
      border-radius: 50%;
   }
}
.triangle {
   border-top: 60rem solid #fff;
   border-left: 25rem solid transparent;
}