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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
}

.container {
    text-align: center;
    padding: 40px;
    background-color: white;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border-radius: 12px;
    max-width: 480px;
    width: 100%;
}

.logo {
    max-width: 50px;
    margin-bottom: 20px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #ddd;
    border-top-color: #0073e6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

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

.title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #111827;
}

.desc {
    font-size: 16px;
    color: #555;
    line-height: 1.5;
    margin-bottom: 20px;
}

.footer {
    margin-top: 30px;
    font-size: 14px;
    color: #999;
}

.error {
    color: #dc3545;
    font-size: 18px;
    margin-top: 20px;
}

.error .title {
    color: #dc3545;
}

@media (max-width: 768px) {
    .container {
        padding: 30px 20px;
        margin: 20px;
    }

    .title {
        font-size: 20px;
    }

    .desc {
        font-size: 14px;
    }
}