Formulario de inicio de sesión borroso

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HTML

<!DOCTYPE html>
<html lang="es">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="style.css">
    <title>ANDEV WEB</title>
</head>
<body>
    <section>
        <form>
            <h1>Inicio</h1>
            <div class="inputbox">
                <ion-icon name="mail-outline"></ion-icon>
                <input type="email" required>
                <label for="">Usuario</label>
            </div>
            <div class="inputbox">
                <ion-icon name="lock-closed-outline"></ion-icon>
                <input type="password" required>
                <label for="">Contraseña</label>
            </div>
            <div class="forget">
                <label for=""><input type="checkbox">Recordar</label>
              <a href="#">Olvidé la Contraseña</a>
            </div>
            <button>Iniciar</button>
            <div class="register">
                <p>No tengo una cuenta <a href="#">Registrate</a></p>
            </div>
        </form>
    </section>
</body>
</html>

CSS

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

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background-image: url("https://images.unsplash.com/photo-1668871333606-ef8461d43922?q=80&w=1932&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D");
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
}

section {
    position: relative;
    max-width: 400px;
    background-color: transparent;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 20px;
    backdrop-filter: blur(55px);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 3rem;
}

h1 {
    font-size: 2rem;
    color: #fff;
    text-align: center;
}

.inputbox {
    position: relative;
    margin: 30px 0;
    max-width: 310px;
    border-bottom: 2px solid #fff;
}

.inputbox label {
    position: absolute;
    top: 50%;
    left: 5px;
    transform: translateY(-50%);
    color: #fff;
    font-size: 1rem;
    pointer-events: none;
    transition: all 0.5s ease-in-out;
}

input:focus ~ label, 
input:valid ~ label {
    top: -5px;
}

.inputbox input {
    width: 100%;
    height: 60px;
    background: transparent;
    border: none;
    outline: none;
    font-size: 1rem;
    padding: 0 35px 0 5px;
    color: #fff;
}

.inputbox ion-icon {
    position: absolute;
    right: 8px;
    color: #fff;
    font-size: 1.2rem;
    top: 20px;
}

.forget {
    margin: 35px 0;
    font-size: 0.85rem;
    color: #fff;
    display: flex;
    justify-content: space-between;
 
}

.forget label {
    display: flex;
    align-items: center;
}

.forget label input {
    margin-right: 3px;
}

.forget a {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
}

.forget a:hover {
    text-decoration: underline;
}

button {
    width: 100%;
    height: 40px;
    border-radius: 40px;
    background-color: rgb(255, 255,255, 1);
    border: none;
    outline: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.4s ease;
}

button:hover {
  background-color: rgb(255, 255,255, 0.5);
}

.register {
    font-size: 0.9rem;
    color: #fff;
    text-align: center;
    margin: 25px 0 10px;
}

.register p a {
    text-decoration: none;
    color: #fff;
    font-weight: 600;
}

.register p a:hover {
    text-decoration: underline;
}