index.css

body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(120deg, #2980b9, #8e44ad);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}
body {
    background-image: url('demon-slayer-7680x4320-17617.jpg');
    background-size: cover; /* Ensures the image covers the entire page */
    background-repeat: no-repeat; /* Prevents the image from repeating */
    background-attachment: fixed; /* Keeps the background image fixed during scrolling */
}
.login-container {
    position: relative;
    width: 400px;
    height: 500px;
    background:rgba(0, 0, 0, 0.684);
    border-radius: 10px;
    box-shadow: 0 15px 25px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    animation: fadeIn 1s;
}

.login-box {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    padding: 40px;
    box-sizing: border-box;
}

.login-box h2 {
    margin: 0 0 30px;
    padding: 0;
    color: #ffffff;
    text-align: center;
}

.input-box {
    position: relative;
    margin-bottom: 30px;
}

.input-box input {
    width: 100%;
    padding: 10px 0;
    font-size: 16px;
    color: #ffffff;
    margin-bottom: 30px;
    border: none;
    border-bottom: 1px solid #333;
    outline: none;
    background: transparent;
}

.input-box label {
    position: absolute;
    top: 0;
    left: 0;
    padding: 10px 0;
    font-size: 16px;
    color: #ffffff;
    pointer-events: none;
    transition: 0.5s;
}

.input-box input:focus ~ label,
.input-box input:valid ~ label {
    top: -20px;
    left: 0;
    color: #2980b9;
    font-size: 12px;
}

button {
    width: 100%;
    background: #2980b9;
    border: none;
    padding: 10px;
    cursor: pointer;
    font-size: 16px;
    color: #fff;
    border-radius: 5px;
    transition: 0.3s;
}

button:hover {
    background: #8e44ad;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}