body {
    background-color: #212529;
    color: #f8f9fa;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    text-align: center;
}

.container {
    padding: 20px;
}

.captcha-box {
    border: 1px solid #444;
    padding: 30px;
    border-radius: 8px;
    background: #1a1d20;
}

.spinner {
    border: 4px solid rgba(255,255,255,0.1);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border-left-color: #58a6ff;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px auto;
}

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

.hidden { display: none; }

.message { font-size: 1.5rem; }

a { color: #58a6ff; text-decoration: underline; }

a:hover { color: #1f6feb; }