* {
        box-sizing: border-box;
        font-family: Arial, sans-serif;
    }


    form {
        background: #fff;
        padding: 30px;
        width: 350px;
        border-radius: 12px;
        box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    }

    h1 {
        text-align: center;
        font-size: 20px;
        margin-bottom: 20px;
        color: #333;
    }

    label {
        display: block;
        margin-top: 12px;
        font-weight: bold;
        color: #444;
        font-size: 14px;
    }

    input {
        width: 100%;
        padding: 10px;
        margin-top: 5px;
        border-radius: 6px;
        border: 1px solid #ccc;
        outline: none;
        transition: 0.3s;
    }

    input:focus:invalid {
        border-color: red;
    }

    input:focus:valid {
        border-color: #00c9a7;
    }

    input[type="submit"] {
        margin-top: 20px;
        background: #00c9a7;
        color: white;
        border: none;
        font-weight: bold;
        cursor: pointer;
    }

    input[type="submit"]:hover {
        background: #009e82;
    }

    .login-link {
        text-align: center;
        margin-top: 15px;
        font-size: 14px;
    }

    .login-link a {
        color: #00c9a7;
        text-decoration: none;
        font-weight: bold;
    }