.fire-border {
    padding: 20px;
    background-color: black;
    color: white;
    border-radius: 10px;
    position: relative;
    display: inline-block;
    border: 5px solid transparent;
    background: linear-gradient(45deg, red, orange, yellow, red, orange);
    background-size: 400% 400%;
    animation: fireGlow 3s linear infinite, fireBorderShift 5s linear infinite;
    box-shadow: 0 0 20px rgba(255, 69, 0, 0.6), 0 0 30px rgba(255, 140, 0, 0.8); /* Efek cahaya api */
  }
  
  @keyframes fireGlow {
    0% {
      background-position: 100% 50%;
    }
    50% {
      background-position: 0% 50%;
    }
    100% {
      background-position: 100% 50%;
    }
  }
  
  @keyframes fireBorderShift {
    0% {
      border-color: red;
    }
    25% {
      border-color: orange;
    }
    50% {
      border-color: yellow;
    }
    75% {
      border-color: orange;
    }
    100% {
      border-color: red;
    }
  }