body {
    background-color: black;
}
* {
    box-sizing: border-box;
}
.container {
    max-width: 500px;
    margin: 60px auto;
    border-radius: 5px;
    border: 2px solid #44D62C;
    color: black;
}
.container #form h1 {
    text-align: center;
    color: green;
    margin: 0px;
}
form {
    background-color: black;
    padding: 30px;
}
form .input {
    margin-bottom: 15px;
}
form label {
    display: block;
    margin-bottom: 10px;
    color: aliceblue;
}
form input {
    padding: 12px 12px;
    width: 100%;
    border: 1px solid #ccc;
    background-color: black;
    color: aliceblue;
    border-radius: 2px;
}
.signup-btn {
    width: 100%;
    border: none;
    background-color: #3471eb;
    font-size: 18px;
    color: aliceblue;
    border-radius: 3px;
    padding: 20px;
    text-align: center;
    cursor: pointer;
}

#user-taken {
    color: red;
    font-size: 12px;
    margin-bottom: 5px;
    margin-top: -10px;
}

.password-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}
.validation-icon {
    position: absolute;
    right: 10px;
    font-size: 18px;
}
.validation-icon.invalid {
    color: red;
}
.validation-icon.valid {
    color: #44D62C;
}

.password-requirements {
    margin-top: 10px;
    font-size: 0.9em;
    color: aliceblue;
}

.password-requirements h4 {
    /*margin-bottom: 5px;*/
    margin-bottom: -10px;
}

.password-requirements ul {
    list-style-type: none;
    padding-left: 0;
}

.password-requirements li {
    margin-bottom: 3px;
}

.password-requirements li.met {
    color: #44D62C;
}

.password-requirements li::before {
    font-family: "Font Awesome 5 Free";
    content: "\f00d";  /* fa-times */
    font-weight: 900;
    margin-right: 5px;
    color: red;
}

.password-requirements li.met::before {
    content: "\f00c";  /* fa-check */
    color: #44D62C;
}