CSS Animated Login Form Design

Open In Editor Publish Your Code

/* The spinning gradient beam */
        .box::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 380px;
            height: 420px;
            background: linear-gradient(0deg, transparent, transparent, #45f3ff, #45f3ff, #45f3ff);
            z-index: 1;
            transform-origin: bottom right;
            animation: animate 6s linear infinite;
        }

/* The second beam for color contrast (Magenta) */
        .box::after {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 380px;
            height: 420px;
            background: linear-gradient(0deg, transparent, transparent, #ff2770, #ff2770, #ff2770);
            z-index: 1;
            transform-origin: bottom right;
            animation: animate 6s linear infinite;
            animation-delay: -3s;
            /* Delays it to be on the opposite side */
        }

/* The inner form container overlay */
        .form-content {
            position: absolute;
            inset: 4px;
            /* Creates the border thickness */
            background: #222;
            /* Slightly lighter than body */
            padding: 50px 40px;
            border-radius: 8px;
            z-index: 2;
            display: flex;
            flex-direction: column;
        }

@keyframes animate {
            0% {
                transform: rotate(0deg);
            }

100% {
                transform: rotate(360deg);
            }
        }

h2 {
            color: #fff;
            font-weight: 500;
            text-align: center;
            letter-spacing: 0.1em;
        }

/* Input Styling with Floating Animation */
        .inputBox {
            position: relative;
            width: 100%;
            margin-top: 35px;
        }

.inputBox input {
            position: relative;
            width: 100%;
            padding: 20px 10px 10px;
            background: transparent;
            outline: none;
            border: none;
            box-shadow: none;
            color: #23242a;
            font-size: 1em;
            letter-spacing: 0.05em;
            transition: 0.5s;
            z-index: 10;
        }

.inputBox span {
            position: absolute;
            left: 0;
            padding: 20px 0px 10px;
            pointer-events: none;
            color: #8f8f8f;
            font-size: 1em;
            letter-spacing: 0.05em;
            transition: 0.5s;
        }

/* Logic for floating label */
        .inputBox input:valid~span,
        .inputBox input:focus~span {
            color: #fff;
            font-size: 0.75em;
            transform: translateY(-34px);
        }

/* The animated underline */
        .inputBox i {
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: #fff;
            border-radius: 4px;
            overflow: hidden;
            transition: 0.5s;
            pointer-events: none;
        }

.inputBox input:valid~i,
        .inputBox input:focus~i {
            height: 44px;
            /* Expands to fill background */
        }

/* Links styling */
        .links {
            display: flex;
            justify-content: space-between;
        }

.links a {
            margin: 10px 0;
            font-size: 0.75em;
            color: #8f8f8f;
            text-decoration: none;
        }

.links a:hover,
        .links a:nth-child(2) {
            color: #fff;
        }

/* Submit Button */
        input[type="submit"] {
            border: none;
            outline: none;
            padding: 9px 25px;
            background: #fff;
            cursor: pointer;
            font-size: 0.9em;
            border-radius: 4px;
            font-weight: 600;
            width: 100px;
            margin-top: 10px;
        }

input[type="submit"]:active {
            opacity: 0.8;
        }

/* The Glow Effect behind the box */
        .border-line {
            position: absolute;
            top: 0;
            inset: 0;
        }

/* Adds a subtle pulse to the form */
        .box:hover .form-content {
            background: #25252b;
            transition: 0.5s;
        }
    </style>
</head>

<body>

<div class="box">
        <div class="form-content">
            <h2>Sign In</h2>
            <form>
                <div class="inputBox">
                    <input type="text" required="required">
                    <span>Username</span>
                    <i></i>
                </div>
                <div class="inputBox">
                    <input type="password" required="required">
                    <span>Password</span>
                    <i></i>
                </div>
                <div class="links">
                    <a href="#">Forgot Password</a>
                    <a href="#">Signup</a>
                </div>
                <input type="submit" value="Login">
            </form>
        </div>
    </div>

</body>

</html>

CSS Animated Login Form Design

Recommended

Animated login and registration

CSS Animation Layers Example

HTML Register Form

HTML

CSS

JS

Recommended

Animated login and registration

CSS Animation Layers Example

HTML Register Form

HTMLCopy

CSSCopy

JSCopy

HTML

CSS

JS