body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.login-container {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.2);
    text-align: center;
    width: 300px;
}

.logo {
    width: 260px;
}

input {
    width: 90%;
    padding: 10px;
    margin: 10px 0;
}

button {
    padding: 10px 20px;
    width: 100%;
    background: #007BFF;
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 5px;
}

.popup {
    display: none;
    background-color: #f44336;
    color: white;
    padding: 10px;
    margin-top: 15px;
    border-radius: 5px;
}