* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Arial", sans-serif;
    background: linear-gradient(
        135deg,
        #f4fb8f,
        #ff6b6b
    );
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.coin-container {
    background-color: rgba(
        255,
        255,
        255,
        0.9
    );
    border-radius: 20px;
    box-shadow: 0 10px 20px
        rgba(0, 0, 0, 0.3);
    padding: 2rem;
    text-align: center;
    animation: fadeIn 1s ease;
    width: 80%;
    max-width: 500px;
    perspective: 1000px;
}

h1 {
    color: #1ca00a;
    font-size: 2.5rem;
    margin: 0 0 1rem;
    text-shadow: 2px 2px 4px
        rgba(0, 0, 0, 0.2);
}

.coin {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 8px 20px
        rgba(0, 0, 0, 0.2);
    transition: transform 0.5s
        ease-in-out;
    margin: 0 auto;
    backface-visibility: hidden;
}

button {
    background-color: #4e6bff;
    color: #fff;
    border: none;
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s
            ease-in-out,
        transform 0.2s ease-in-out;
    width: 100%;
    margin-top: 20px;
}

button:hover {
    background-image: linear-gradient(
        45deg,
        #4e6bff,
        #ff6b6b
    );
    transform: scale(1.05);
}

.result {
    margin-top: 20px;
    font-size: 24px;
    color: #333;
    transition: opacity 0.5s ease-in-out;
    opacity: 0;
    text-transform: uppercase;
    font-weight: bold;
    text-shadow: 1px 1px 2px
        rgba(0, 0, 0, 0.4);
    letter-spacing: 2px;
}

.coin:hover {
    transform: scale(1.1);
    transition: transform 0.3s
        ease-in-out;
}

@keyframes spin {
    0% {
        transform: rotateY(0deg);
    }
    100% {
        transform: rotateY(360deg);
    }
}

.coin.flip {
    animation: spin 1s
        cubic-bezier(0.4, 2.5, 0.6, 0.5);
}

.coin img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transform: rotateY(0deg);
}

.coin-container {
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 10px
        rgba(0, 0, 0, 0.2);
    transition: transform 0.5s
        ease-in-out;
}

.coin-container:hover {
    transform: scale(1.02);
}

h2 {
    color: #333;
    font-size: 24px;
    margin: 10px 0;
}

label {
    font-size: 16px;
    font-weight: bold;
    color: #333;
  }
  
  #username {
    margin-top: 8px;
    padding: 10px;
    width: 90%;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 15px;
  }

  /* Responsive  */
  /* Responsive styles */
@media (max-width: 768px) {
    .coin {
      width: 120px;
      height: 120px;
    }
  
    h1 {
      font-size: 2rem;
    }
  
    h2,
    h3 {
      font-size: 1.1rem;
    }
  
    .coin-container {
      padding: 1.5rem;
    }
  
    button {
      font-size: 0.95rem;
      padding: 10px 15px;
    }
  }
  
  @media (max-width: 480px) {
    .coin {
      width: 100px;
      height: 100px;
    }
  
    #username {
      font-size: 0.9rem;
    }
  
    button {
      font-size: 0.9rem;
    }
  
    h3 {
      font-size: 1rem;
    }
  
    .coin-container {
      padding: 1rem;
    }
  }