/* Preloader Styling */
#preloader {
    position: fixed;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    z-index: 9999;
    display: none;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease-out;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(0, 0, 0, 0.1);
    border-left-color: #000;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Login Container */
.login-container {
    width: 300px;
    margin: 100px auto;
    padding: 20px;
    text-align: center;
    border: 1px solid #ccc;
    border-radius: 10px;
    background: #f9f9f9;
}

input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
}

button {
    width: 100%;
    padding: 10px;
    background: #28a745;
    color: white;
    border: none;
    cursor: pointer;
}

.alert {
    padding: 10px;
    background: red;
    color: white;
}