.hvac-admin-dashboard {
    max-width: 1200px;
    margin: 20px 0;
}

/* Health Check */
.hvac-health-check {
    background: #fff;
    border: 1px solid #ccd0d4;
    box-shadow: 0 1px 1px rgba(0,0,0,0.04);
    margin-bottom: 20px;
    padding: 20px;
}

.health-status {
    display: flex;
    align-items: center;
    margin: 15px 0;
    font-size: 16px;
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 10px;
    display: inline-block;
}

.health-status.healthy .status-indicator {
    background-color: #46b450;
}

.health-status.warning .status-indicator {
    background-color: #ffb900;
}

.health-status.critical .status-indicator {
    background-color: #dc3232;
}

.status-badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 3px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.status-ok {
    background-color: #d4edda;
    color: #155724;
}

.status-warning {
    background-color: #fff3cd;
    color: #856404;
}

.status-error {
    background-color: #f8d7da;
    color: #721c24;
}

/* Dashboard Grid */
.hvac-dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

/* Dashboard Widgets */
.hvac-dashboard-widget {
    background: #fff;
    border: 1px solid #ccd0d4;
    box-shadow: 0 1px 1px rgba(0,0,0,0.04);
    padding: 20px;
}

.hvac-dashboard-widget h3 {
    margin: 0 0 15px 0;
    padding: 0;
    font-size: 18px;
    font-weight: 600;
    color: #23282d;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
}

.metric {
    text-align: center;
    padding: 15px 10px;
    background-color: #f8f9fa;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.metric:hover {
    background-color: #e9ecef;
}

.metric-value {
    font-size: 28px;
    font-weight: 700;
    color: #0073aa;
    margin-bottom: 5px;
    transition: transform 0.3s ease;
}

.metric-value.updated {
    animation: pulse 0.6s ease-in-out;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.metric-label {
    font-size: 12px;
    color: #666;
    font-weight: 500;
    text-transform: uppercase;
}

/* Maintenance Controls */
.maintenance-controls .maintenance-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    margin-bottom: 15px;
}

.maintenance-controls button {
    width: 100%;
    padding: 8px 12px;
    text-align: center;
}

.maintenance-log {
    margin-top: 20px;
    padding: 15px;
    background-color: #f5f5f5;
    border: 1px solid #ddd;
    border-radius: 3px;
}

.maintenance-log h4 {
    margin: 0 0 10px 0;
    font-size: 14px;
    font-weight: 600;
}

#maintenance-output {
    padding: 10px;
    background-color: #fff;
    border: 1px solid #ccc;
    border-radius: 3px;
    font-family: monospace;
    font-size: 12px;
    max-height: 200px;
    overflow-y: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* Dashboard Actions */
.hvac-dashboard-actions {
    background: #fff;
    border: 1px solid #ccd0d4;
    box-shadow: 0 1px 1px rgba(0,0,0,0.04);
    padding: 15px 20px;
    text-align: center;
}

.hvac-dashboard-actions button {
    margin: 0 5px;
}

/* Responsive adjustments */
@media screen and (max-width: 768px) {
    .hvac-dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .maintenance-controls .maintenance-actions {
        grid-template-columns: 1fr;
    }
}

/* Loading state */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #0073aa;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Notices */
.hvac-admin-dashboard .notice {
    margin: 10px 0;
}

/* Focus Management Styles - WCAG 2.1 Compliance */
/* Added for keyboard accessibility and screen reader support */

/* Button Focus Styles */
.hvac-button:focus,
.hvac-content .button:focus,
.hvac-content button:focus,
.hvac-content input[type="submit"]:focus,
.hvac-email-submit:focus,
.hvac-filter-submit:focus,
.hvac-certificate-actions button:focus,
.hvac-certificate-actions a:focus {
    outline: 2px solid #005fcc;
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(0, 95, 204, 0.2);
    border-radius: 4px;
}

/* Input Focus Styles */
.hvac-form-input:focus,
.hvac-content input[type="text"]:focus,
.hvac-content input[type="email"]:focus,
.hvac-content input[type="password"]:focus,
.hvac-content input[type="url"]:focus,
.hvac-content textarea:focus,
.hvac-content select:focus,
.hvac-email-form-row input:focus,
.hvac-email-form-row textarea:focus,
.hvac-filter-group input:focus,
.hvac-filter-group select:focus {
    outline: 2px solid #005fcc;
    outline-offset: 2px;
    border-color: #005fcc;
    box-shadow: 0 0 0 3px rgba(0, 95, 204, 0.2);
}

/* Link Focus Styles */
.hvac-content a:focus,
.hvac-event-link:focus,
.hvac-certificate-link:focus,
.hvac-attendee-profile-icon:focus,
.hvac-dashboard-nav a:focus,
.hvac-email-navigation a:focus {
    outline: 2px solid #005fcc;
    outline-offset: 2px;
    text-decoration: underline;
    background-color: rgba(0, 95, 204, 0.1);
    border-radius: 2px;
}

/* Interactive Element Focus Styles */
.hvac-attendee-checkbox:focus,
.hvac-select-all-container input[type="checkbox"]:focus,
.hvac-modal-close:focus,
.hvac-certificate-table tr:focus {
    outline: 2px solid #005fcc;
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(0, 95, 204, 0.2);
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .hvac-content *:focus {
        outline: 3px solid #000000;
        outline-offset: 2px;
        background-color: #ffff00;
        color: #000000;
    }
}

/* Focus-visible polyfill support */

/* Reset focus for mouse users while preserving keyboard accessibility */
.js-focus-visible :focus:not(.focus-visible) {
    outline: none;
    box-shadow: none;
}

/* Ensure focus is visible for keyboard users */
.js-focus-visible .focus-visible {
    outline: 2px solid #005fcc;
    outline-offset: 2px;
}