body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-container {
    background: #fff;
    padding: 40px;
    border-radius: 12px;
    width: 320px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    text-align: center;
}

h2 {
    margin-bottom: 20px;
}

input {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 8px;
}

button {
    width: 100%;
    padding: 12px;
    background: #007BFF;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
}

button:hover {
    background: #0056b3;
}

.error {
    color: red;
    margin-bottom: 10px;
}