@import url(https://fonts.googleapis.com/css?family=Lato:300italic,700);

html,
body {
  width: 100%;
  height: 100%;
}

body {
  background: #ee9ca7;
}

.pos {
  transform: scale(2.5);
  transform-origin: center center;
  margin-top: 250px;
  margin-left: auto;
  margin-right: auto;
  width: fit-content;
  position: relative; /* Đảm bảo con số và nến căn theo khung này */
}

#cake {
  display: block;
  position: relative;
  margin: -10em auto 0 auto;
}

/* ============================================== SỐ 20 */

/* ============================================== Candle (Dịch sang trái) */
.velas {
  background: #ffffff;
  border-radius: 10px;
  position: absolute;
  top: 385px; 
  left: 50%;
  /* Dịch sang trái: thay từ -2.4px thành -35px */
  margin-left: -35px; 
  margin-top: -8.33333333px;
  width: 5px;
  height: 35px;
  opacity: 0;
  transform: translateY(-300px);
  backface-visibility: hidden;
  animation: in 500ms 6s ease-out forwards;
  z-index: 10;
}

.velas:after,
.velas:before {
  background: rgba(255, 0, 0, 0.4);
  content: "";
  position: absolute;
  width: 100%;
  height: 2.22222222px;
}
.velas:after { top: 25%; left: 0; }
.velas:before { top: 45%; left: 0; }

/* ============================================== Fire (Đi theo nến) */
.fuego {
  border-radius: 100%;
  position: absolute;
  top: -20px;
  left: 50%;
  margin-left: -2.6px;
  width: 6.66666667px;
  height: 18px;
}
.fuego:nth-child(1) { animation: fuego 2s 6.5s infinite; }
.fuego:nth-child(2) { animation: fuego 1.5s 6.5s infinite; }
.fuego:nth-child(3) { animation: fuego 1s 6.5s infinite; }
.fuego:nth-child(4) { animation: fuego 0.5s 6.5s infinite; }
.fuego:nth-child(5) { animation: fuego 0.2s 6.5s infinite; }

@keyframes fuego {
  0%, 100% {
    background: rgba(254, 248, 97, 0.5);
    box-shadow: 0 0 40px 10px rgba(248, 233, 209, 0.2);
    transform: translateY(0) scale(1);
  }
  50% {
    background: rgba(255, 50, 0, 0.1);
    box-shadow: 0 0 40px 20px rgba(248, 233, 209, 0.2);
    transform: translateY(-20px) scale(0);
  }
}

@keyframes in {
  to {
    transform: translateY(0);
    opacity: 1;
  }
}