body {
    background-color: #121212;
    color: #e4e4e4;
    display: flex;
    justify-content: center;
    align-items: center;
}

.logo {
   color: #e4e4e4;
}

header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../images/6.jpg'); 
    background-position: center ;
    background-size: cover;
    opacity: 1; 
    z-index: -1;
    box-shadow: inset 0px 700px 300px -600px #121212;

}
.ctn {
    display: inline-block;
    opacity: 1;
    transition:  all 0.5s, opacity 0.2s ;
    letter-spacing: 2px;
    font-weight: 500;
    cursor: pointer;
    user-select: none;
}
.ctn:hover {
    box-shadow:
    0 0 0px 0px #869cf4,  /* inner  */
    0 0 10px 0px #fff, /* middle  */
    0 0 40px 1px #869cf4; /* outer  */
    font-weight: 700;
    text-indent: 20px;
    letter-spacing: 2px;
}
.ctn:active{
    opacity: 0.7;
}
.ctn{
    padding: 12px 19px;
    background: #869cf4;
    border-radius: 10px;
    color: whitesmoke;
}
.wrapper  .ctn {
        padding: 10px 10px;
        font-size: 1rem;
}
.wrapper {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 85%;
    max-width: 400px; 
    padding: 40px;
    transform: translate(-50%, -50%);
    background: rgba(red, green, blue, alpha);
    backdrop-filter: blur(30px);
    box-shadow: 0 5px 25px rgba(255, 255, 255, 0.4);
    border-radius: 10px;

}

.wrapper h1 {
    margin: 0 0 30px;
    text-align: center;
    color: #869cf4;
}

.wrapper .input-group {
    position: relative;
    margin: 25px 0;
}

.wrapper .input-group input {
    width: 100%;
    padding: 15px 0;
    font-size: 15px;
    color: #e4e4e4;
    border: 1px solid #888;
    border-radius: 5px ;
    padding: 15px 5px;
    background: transparent;
    outline: none;
}

input::placeholder {
    color: #888;       
}

@media (max-width: 600px) {
    .wrapper {
        padding: 20px; 
    }

    .wrapper .input-group input, .ctn {
        font-size: 14px; 
    }

    .ctn {
        padding: 10px 15px;
    }
}