body {
    background-color: #f5f6fa;
}
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #2c3e50, #34495e);
}
.login-card {
    max-width: 400px;
    width: 100%;
}
.stat-card {
    border-radius: 12px;
    border: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.badge-status-ok { background-color: #2ecc71; }
.badge-status-warning { background-color: #f39c12; }
.badge-status-expired { background-color: #e74c3c; }
.badge-status-unknown { background-color: #95a5a6; }
.captcha-box {
    background: #eef1f5;
    border-radius: 8px;
    padding: 10px 15px;
    font-weight: 600;
    letter-spacing: 2px;
    text-align: center;
    font-size: 1.2rem;
}
th a { color: inherit; text-decoration: none; }
th a:hover { text-decoration: underline; }