body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f0f0f0;
    margin: 0;
    font-family: 'Roboto', sans-serif;
    color: #444;
}

.container {
    text-align: center;
    background: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #333;
}

.loader {
    border: 12px solid #f3f3f3;
    border-radius: 50%;
    border-top: 12px solid #3498db;
    width: 80px;
    height: 80px;
    animation: spin 1.5s linear infinite;
    margin: 0 auto 20px auto;
}

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

.progress-bar {
    width: 100%;
    background: #e0e0e0;
    border-radius: 5px;
    overflow: hidden;
    margin: 20px 0;
    height: 20px;
}

.progress-bar-fill {
    width: 0;
    height: 100%;
    background: #3498db;
    border-radius: 5px;
    animation: load 3s forwards;
}

@keyframes load {
    to { width: 100%; }
}

.status {
    font-size: 16px;
    color: #555;
    margin-top: 10px;
    height: 20px;
}

.message {
    display: none;
    font-size: 18px;
    color: #e74c3c;
    margin-top: 20px;
}