Форма №1

<link rel="preconnect" href="https://fonts.gstatic.com" />
<link href="https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500&display=swap" rel="stylesheet" />

<div class="container-form-1">
    <form class="form-1">
        <p>Здравствуйте</p>
        <input type="email" placeholder="Email" /><br />
        <input type="password" placeholder="Пароль" /><br />
        <input type="button" value="Войти" /><br />
        <a href="#">Забыли пароль?</a>
    </form>

    <div class="drops">
        <div class="drop-form-1 drop-1-form-1"></div>
        <div class="drop-form-1 drop-2-form-1"></div>
        <div class="drop-form-1 drop-3-form-1"></div>
        <div class="drop-form-1 drop-4-form-1"></div>
        <div class="drop-form-1 drop-5-form-1"></div>
    </div>
</div>

body {
    /*	
*  background: linear-gradient(45deg, #FC466B, #3F5EFB);
*  height: 100vh;
*/
    font-family: "Montserrat", sans-serif;
}

.container-form-1 {
    position: absolute;
    -webkit-transform: translate(-50%, -50%);
    -moz-transform: translate(-50%, -50%);
    -o-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    top: 50%;
    left: 50%;
}

form.form-1 {
    background: rgba(255, 255, 255, 0.3);
    padding: 3em;
    height: 320px;
    -webkit-border-radius: 20px;
    -moz-border-radius: 20px;
    border-radius: 20px;
    border-left: 1px solid rgba(255, 255, 255, 0.3);
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    -webkit-box-shadow: 20px 20px 40px -6px rgba(0, 0, 0, 0.2);
    -moz-box-shadow: 20px 20px 40px -6px rgba(0, 0, 0, 0.2);
    box-shadow: 20px 20px 40px -6px rgba(0, 0, 0, 0.2);
    text-align: center;
    position: relative;
    -webkit-transition: all 0.2s ease-in-out;
    -o-transition: all 0.2s ease-in-out;
    -moz-transition: all 0.2s ease-in-out;
    transition: all 0.2s ease-in-out;
}
form.form-1 p {
    font-weight: 500;
    color: #fff;
    opacity: 0.7;
    font-size: 1.4rem;
    margin-top: 0;
    margin-bottom: 60px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}
form.form-1 a {
    text-decoration: none;
    color: #ddd;
    font-size: 12px;
}
form.form-1 a:hover {
    text-shadow: 2px 2px 6px #00000040;
}
form a:active {
    text-shadow: none;
}
form.form-1 input {
    background: transparent;
    width: 200px;
    padding: 1em;
    margin-bottom: 2em;
    border: none;
    border-left: 1px solid rgba(255, 255, 255, 0.3);
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    -webkit-border-radius: 5000px;
    -moz-border-radius: 5000px;
    border-radius: 5000px;
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
    -webkit-box-shadow: 4px 4px 60px rgba(0, 0, 0, 0.2);
    -moz-box-shadow: 4px 4px 60px rgba(0, 0, 0, 0.2);
    box-shadow: 4px 4px 60px rgba(0, 0, 0, 0.2);
    color: #fff;
    font-family: Montserrat, sans-serif;
    font-weight: 500;
    -webkit-transition: all 0.2s ease-in-out;
    -o-transition: all 0.2s ease-in-out;
    -moz-transition: all 0.2s ease-in-out;
    transition: all 0.2s ease-in-out;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}
form.form-1 input:hover {
    background: rgba(255, 255, 255, 0.1);
    -webkit-box-shadow: 4px 4px 60px 8px rgba(0, 0, 0, 0.2);
    -moz-box-shadow: 4px 4px 60px 8px rgba(0, 0, 0, 0.2);
    box-shadow: 4px 4px 60px 8px rgba(0, 0, 0, 0.2);
}
form.form-1 input[type="email"]:focus,
form.form-1 input[type="password"]:focus {
    background: rgba(255, 255, 255, 0.1);
    -webkit-box-shadow: 4px 4px 60px 8px rgba(0, 0, 0, 0.2);
    -moz-box-shadow: 4px 4px 60px 8px rgba(0, 0, 0, 0.2);
    box-shadow: 4px 4px 60px 8px rgba(0, 0, 0, 0.2);
}
form.form-1 input[type="button"] {
    margin-top: 10px;
    width: 150px;
    font-size: 1rem;
}
form.form-1 input[type="button"]:hover {
    cursor: pointer;
}
form.form-1 input[type="button"]:active {
    background: rgba(255, 255, 255, 0.2);
}
form.form-1:hover {
    margin: 4px;
}

form.form-1:-moz-placeholder {
    font-family: Montserrat, sans-serif;
    font-weight: 400;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.4);
}

form.form-1:-ms-input-placeholder {
    font-family: Montserrat, sans-serif;
    font-weight: 400;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.4);
}

form.form-1:placeholder {
    font-family: Montserrat, sans-serif;
    font-weight: 400;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.4);
}

.drop-form-1 {
    background: rgba(255, 255, 255, 0.3);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    -webkit-border-radius: 10px;
    -moz-border-radius: 10px;
    border-radius: 10px;
    border-left: 1px solid rgba(255, 255, 255, 0.3);
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    -webkit-box-shadow: 10px 10px 60px -8px rgba(0, 0, 0, 0.2);
    -moz-box-shadow: 10px 10px 60px -8px rgba(0, 0, 0, 0.2);
    box-shadow: 10px 10px 60px -8px rgba(0, 0, 0, 0.2);
    position: absolute;
    -webkit-transition: all 0.2s ease;
    -o-transition: all 0.2s ease;
    -moz-transition: all 0.2s ease;
    transition: all 0.2s ease;
}
.drop-1-form-1 {
    height: 80px;
    width: 80px;
    top: -20px;
    left: -40px;
    z-index: -1;
}
.drop-2-form-1 {
    height: 80px;
    width: 80px;
    bottom: -30px;
    right: -10px;
}
.drop-3-form-1 {
    height: 100px;
    width: 100px;
    bottom: 120px;
    right: -50px;
    z-index: -1;
}
.drop-4-form-1 {
    height: 120px;
    width: 120px;
    top: -60px;
    right: -60px;
}
.drop-5-form-1 {
    height: 60px;
    width: 60px;
    bottom: 170px;
    left: 90px;
    z-index: -1;
}

/* 
* Данное свойство сильно повышает минимально подерживаемые версии браузеров.
*/
form.form-1 a, form.form-1 input:focus, 
form.form-1 select:focus, 
form.form-1 textarea:focus, form.form-1 button:focus {
 outline: none;
}