* {
    box-sizing: border-box;
    font-family: sans-serif;
    margin: 0;
    padding: 0;
}

body {
    background: #1e1e2f;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    width: 320px;
    height: 420px;
    perspective: 1000px;
    border-radius: 15px;
    box-shadow: 0px 0px 100px 10px #215454;
}

.card {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.8s;
}

.flipped {
    transform: rotateY(180deg);
}

.side {
    position: absolute;
    width: 100%;
    height: 100%;
    padding: 30px;
    border-radius: 15px;
    backface-visibility: hidden;
    background: white;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.back {
    transform: rotateY(180deg);
}

.input-group {
    width: 100%;
    display: flex;
    align-items: center;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 8px;
    padding: 8px;
    background-color: #f9f9f9;
    transition: all 0.5s ease-out;
}

.input-group img {
    width: 20px;
    height: 20px;
    margin-left: 10px;
}

.input-group input {
    border: none;
    outline: none;
    font-size: 14px;
    padding: 5px;
    background: transparent;
}

.input-group:hover{
    border: 1px solid #333;
}

.btn {
    margin-top: 15px;
    padding: 10px;
    width: 100%;
    background: #4b0082;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.4s ease-in-out
}

.btn:hover{
    transform: translateY(-0.5rem);
    opacity: 0.9;
}

.switch {
    margin-top: 20px;
    background: none;
    border: none;
    color: #4b0082;
    cursor: pointer;
    font-size: 14px;
    text-decoration: underline;
}