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

html, body {
    height: 100%;
    overflow: hidden; /* prevents scrolling */
}

body{
    background-image: url('IMAGES/Moon.png');
    background-size: cover;
    background-position: center center; /* Optional: centers the image */
    font-family: "Century Gothic", CenturyGothic, AppleGothic, sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    gap: 20px;
    padding-top: clamp(6px, 5vh, 30px);
    padding-bottom: clamp(6px, 5vh, 30px);
}

.card{
    padding: 30px 20px;
    width: 90%;
    max-width: 1100px;
    height: 80%;
    max-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 3/4;
    border-radius: 50px;
    flex-direction: column;
    perspective: 1000px;
    position: relative;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    tap-highlight-color: transparent;
}

.front,.back{
     padding: 5%;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: absolute;
    border-radius: 50px;
    top: 0;
    left: 0;
    transition: transform 0.6s, background-color 0.6s;
}

.front {
    background: rgba(255, 255, 255, 0.22);
    border-radius: 16px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    border: 1px solid rgba(255, 255, 255, 0.6);
  }
  

.back{
    transform: rotateX(180deg);
    background: rgba(255, 255, 255, 0.22);
border-radius: 16px;
box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
backdrop-filter: blur(5px);
-webkit-backdrop-filter: blur(5px);
border: 1px solid rgba(255, 255, 255, 0.6)
}

.card.flipped .front{
transform: rotateX(180deg);
}

.card.flipped .back{
    transform: rotateX(0deg);
}
.back .big-text{
    font-size: 50px;
    color: #f2f2f2;
    font-weight: 700;
    text-align: center;
}

.front .big-text{
    font-size: 50px;
    color:#f2f2f2;
    font-weight: 700;
    text-align: center;
}

.subtext{
    font-size: 16px;
    text-align: center;
    color: #D7D8D9;
}

.subtext-copy{
    font-size: 16px;
    text-align: center;
    color: #D7D8D9;
}

.smaller-text{
    font-size: 18px;
    color:#D7D8D9;
    text-align: center;
}


.shape {
    width: 60px;
    height: 60px;
    background: linear-gradient(90deg, hsla(17, 95%, 50%, 1) 0%, hsla(42, 94%, 57%, 1) 100%);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    top: 20px;    /* top-right corner */
    right: 20px;
    transition: transform 0.2s;
    
  }
  
  .shape:hover {
    transform: scale(1.1);
  }

  #instructions{
    transition: opacity 0.6s ease;
  }

  #instructions.hidden{
    pointer-events: none;
  }
  
  /* responsiveness */
  /* tablets, small laptops*/
@media(min-width: 769px) and (max-width: 1200px) {
    .card {
        width: 65%;
        max-width: 700px;
        padding: 30px;

    .front .big-text, .back .big-text{
        font-size: 42px;
        }

    }
}

/* larger screens and desktops */
@media (min-width: 1201px) and (max-width: 1600px) {
    .card {
        width: 60%;
        max-width: 1000px;
    }

    .front .big-text,
    .back .big-text {
        font-size: 44px;
    }

    .subtext,.subtext-copy {
        font-size: 13px;
    }

    body{
        padding-top: 2dvh;
        padding-bottom: 2dvh;
    }
}

/* ultra wide monitors */
@media (min-width: 1601px) {
    .card {
        width: 60%;
        max-width: 1100px;
    }

    .front .big-text,
    .back .big-text {
        font-size: 54px;
    }
}

/* medium phones, small tablets */
@media (min-width: 481px) and (max-width: 768px) {
    .card {
        width: 90%;
        max-width: 500px;
        padding: 25px;
        -webkit-tap-highlight-color: transparent;
        tap-hightlight-color: transparent;
    }

    .front .big-text,
    .back .big-text {
        font-size: 34px;
    }

    .smaller-text {
        font-size: 16px;
    }

    body{
        padding-top: 2px;
        padding-bottom: 2px;
    }
}

/* small phones */
@media (max-width: 480px) {
    .card {
        width: 90%;
       
        padding: 15px;
        border-radius: 30px;
        height: auto;           /* allow flexible height */
        max-width: 90vw;
    max-height: 80vh;    /* ensures card is tall enough */
        aspect-ratio: 3/4;
        -webkit-tap-highlight-color: transparent;
        tap-hightlight-color: transparent;
    }

    .front .big-text,
    .back .big-text {
        font-size: 26px;
    }

    .smaller-text {
        font-size: 14px;
    }

    .shape {
        width: 50px;
        height: 50px;
        top: 15px;
        right: 15px;
        font-size: 12px;
        -webkit-tap-highlight-color: transparent;
        tap-highlight-color: transparent;
    }

    .subtext,
    .subtext-copy {
        font-size: 14px;
    }
}