<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>Glassmorphism login Formr</title>
        <link rel="stylesheet" href="style1.css" />
        <link
            rel="stylesheet"
            href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.4/css/all.min.css"
        />
        <link
            href="https://fonts.googleapis.com/css2?family=Poppins:wght@300;500;600&display=swap"
            rel="stylesheet"
        />
    </head>
    <body>
        <div class="inFormBackground">
            <div class="circle"></div>
            <div class="circle"></div>
            <div class="inLoginForm">
                <form onsubmit="return false">
                    <div class="title"><h3>Login Here</h3></div>
                    <div class="inputGroup">
                        <label for="email">Email</label>
                        <input
                            type="email"
                            placeholder="Enter Email"
                            id="email"
                        />
                    </div>
                    <div class="inputGroup">
                        <label for="password">Password</label>
                        <input
                            type="email"
                            placeholder="Enter Password"
                            id="password"
                        />
                    </div>
                    <button class="submitForm">Log In</button>
                    <div class="social">
                        <div class="go"><i class="fab fa-google"></i></div>
                        <div class="fb"><i class="fab fa-facebook"></i></div>
                        <div class="tw"><i class="fab fa-twitter"></i></div>
                    </div>
                </form>
            </div>
        </div>
    </body>
</html>
* {
    margin: 0;
    padding: 0;
}
body {
    height: 100vh;
    display: flex;
    overflow: hidden;
    align-items: center;
    justify-content: center;
    background-color: #141225;
}
.inFormBackground {
    margin: 0rem 2rem;
}
.inFormBackground,
.inLoginForm {
    width: 25rem;
    height: 30rem;
    max-width: 320px;
    position: relative;
}
.circle {
    width: 10rem;
    height: 10rem;
    position: absolute;
    border-radius: 50%;
}
.circle:first-child {
    left: -20%;
    top: -12%;
    background: linear-gradient(#ff0060, #c302b5);
}
.circle:nth-child(2) {
    right: -22%;
    bottom: -14%;
    background: linear-gradient(164deg, #144e7cfc, #1877f2);
}
.inLoginForm form {
    top: 50%;
    left: 50%;
    width: 16rem;
    height: 24rem;
    max-width: 320px;
    position: absolute;
    padding: 50px 35px;
    border-radius: 10px;
    backdrop-filter: blur(5px);
    transform: translate(-50%, -50%);
    box-shadow: 0 0 40px rgba(8, 7, 16, 0.6);
    border: 2px solid rgba(255, 255, 255, 0.1);
    background-color: rgba(255, 255, 255, 0.13);
}
form * {
    border: none;
    outline: none;
    color: #ffffff;
    letter-spacing: 0.5px;
    font-family: "Poppins", sans-serif;
}
.title {
    font-size: 32px;
    font-weight: 500;
    line-height: 22px;
    text-align: center;
}
.inputGroup label {
    display: block;
    margin-top: 30px;
    font-size: 16px;
    font-weight: 500;
}
.inputGroup input {
    width: 92%;
    height: 50px;
    display: block;
    padding: 0 10px;
    margin-top: 8px;
    font-size: 14px;
    font-weight: 300;
    border-radius: 3px;
    background-color: rgba(255, 255, 255, 0.07);
}
::placeholder {
    color: #e5e5e5;
}
.submitForm {
    width: 100%;
    z-index: 1;
    margin-top: 30px;
    color: #080710;
    padding: 15px 0;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    overflow: hidden;
    border-radius: 5px;
    position: relative;
    background: #fff;
}
.submitForm::before {
    content: "";
    top: 0%;
    left: -100%;
    z-index: -1;
    width: 100%;
    height: 100%;
    color: #fff;
    border-radius: 5px;
    position: absolute;
    transition: left 0.4s, color 0.4s;
    background-color: #202020;
}
.submitForm:hover {
    color: #fff;
}
.submitForm:hover::before {
    left: 0%;
}
.social {
    display: flex;
    margin-top: 20px;
    align-items: center;
    justify-content: center;
}
.social div {
    width: 3rem;
    height: 3rem;
    display: flex;
    cursor: pointer;
    color: #eaf0fb;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.27);
}
.social div:hover {
    background-color: rgba(255, 255, 255, 0.47);
}
.social .fb {
    margin-left: 25px;
}
.social .tw {
    margin-left: 25px;
}

External CSS

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