* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body, html {
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
}

#loading-container {
    text-align: center;
    width: 350px;
    padding: 20px;
    background-color: white;
    box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}

.loader {
    border: 16px solid #f3f3f3;
    border-top: 16px solid #3498db;
    border-radius: 50%;
    width: 80px;
    height: 80px;
    animation: spin 2s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#loading-text {
    margin-top: 20px;
    font-size: 18px;
    color: #333;
}

.progress-container {
    margin-top: 20px;
    width: 100%;
    background-color: #e0e0e0;
    border-radius: 5px;
    height: 20px;
}

#progress-bar {
    width: 0%;
    height: 100%;
    background-color: #3498db;
    border-radius: 5px;
    transition: width 1s ease-in-out;
}

#messages-container {
    margin-top: 20px;
    font-size: 14px;
    color: #777;
    text-align: left;
    max-height: 100px;
    overflow-y: scroll;
}

.message {
    margin-bottom: 5px;
}