CSS Login Input Focus effect animation | HTML, CSS & JavaScript

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #0d1117;
    font-family: Arial, sans-serif;
}

.login-box {
    width: 360px;
    padding: 40px;
    border-radius: 20px;
    background: #161b22;
    box-shadow:
        15px 15px 30px #080a0d,
        -10px -10px 25px #222a33;
}

.login-box h2 {
    text-align: center;
    color: #fff;
    margin-bottom: 30px;
}

/* Input group */
.input-group {
    position: relative;
    margin: 25px 0;
}

/* Input */
.input-group input {
    width: 100%;
    padding: 15px 15px;
    border: none;
    outline: none;
    border-radius: 10px;
    background: #161b22;
    color: #fff;
    font-size: 16px;
    box-shadow:
        inset 5px 5px 10px #080a0d,
        inset -5px -5px 10px #222a33;
    transition: 0.4s ease;
}

/* Placeholder */
.input-group label {
    position: absolute;
    left: 15px;
    top: 15px;
    color: #777;
    pointer-events: none;
    transition: 0.3s ease;
}

/* Focus effect */
.input-group input:focus {
    box-shadow:
        inset 3px 3px 7px #080a0d,
        inset -3px -3px 7px #222a33,
        0 0 12px rgba(0, 200, 255, 0.5);
    transform: translateY(-2px);
}

/* Floating label */
.input-group input:focus + label,
.input-group input:not(:placeholder-shown) + label {
    top: -10px;
    left: 12px;
    padding: 0 7px;
    background: #161b22;
    color: #00d9ff;
    font-size: 13px;
}

/* Login button */
button {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 10px;
    background: #00d9ff;
    color: #071014;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s ease;
}

button:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 20px rgba(0, 217, 255, 0.7);
}

button:active {
    transform: scale(0.97);
}

- CSS Login Input Focus effect animation

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