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

body{
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #1a1a2e;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.card-container{
    width: 340px;
    height: 420px;
    perspective: 1000px;
    cursor: pointer;
}

.card{
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.7s;
}

.card-face{
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    text-align: center;
}

.card-front{
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.4);
}

.card-front .icon{
    font-size: 64px;
    margin-bottom: 24px;
}

.card-front h2{
    font-size: 26px;
    margin-bottom: 15px;
}
.card-front p{
    font-size: 15px;
    line-height: 1.6;
    opacity: 0.9;
}

.card-back{
    background: linear-gradient(135deg, #f093fb, #f5576c);
    color: #fff;
    transform: rotateY(180deg);
    box-shadow: 0 20px 60px rgba(245, 87, 108, 0.4);
}

.card-back .icon{
    font-size: 64px;
    margin-bottom: 24px;
}

.card-back h2{
    font-size: 26px;
    line-height: 1.6;
}

.card-back p{
    font-size: 15px;
    line-height: 1.6;
    opacity: 0.85;
}

.hint{
margin-top: 24px;
font-size: 13px;

}