body, html {
    height: 100%;
    margin: 0;
    font-family: Arial, sans-serif;
}
body {
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #83a4d4, #b6fbff);
}
.login-container {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    width: 300px;
}
h2 {
    margin-top: 0;
    color: #333;
    text-align: center;
}
input {
    width: 95%;
    padding: 10px;
    margin: 10px 0;
    border: none;
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.8);
}
button {
    width: 70%;
    margin: 0 auto;
    display: block;
    padding: 10px;
    margin-top: 20px;
    border: solid 1px;
    border-radius: 20px;
    background: #4CAF50;
    color: white;
    cursor: pointer;
    transition: background 0.3s ease;
}
button:hover {
    background: #45a049;
}
.error {
    color: #ff0000;
    text-align: center;
    margin-top: 10px;
}
.success {
    display: none;
    text-align: center;
}