/* Quell Dashboard - Dark Mode Enterprise Theme (REQ-WEB-01) */
:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-hover: #30363d;
    --border-color: #30363d;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent-primary: #58a6ff;
    --accent-secondary: #1f6feb;
    --accent-success: #3fb950;
    --accent-warning: #d29922;
    --accent-error: #f85149;
    --mesh-node-online: #3fb950;
    --mesh-node-offline: #6e7681;
    --mesh-node-root: #a371f7;
    --db-low: #3fb950;
    --db-medium: #d29922;
    --db-high: #f85149;
}

html, body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 600;
}

h1:focus {
    outline: none;
}

a, .btn-link {
    color: var(--accent-primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Buttons */
.btn {
    border-radius: 6px;
    padding: 8px 16px;
    font-weight: 500;
    transition: all 0.15s ease;
}

.btn-primary {
    color: #fff;
    background-color: var(--accent-secondary);
    border-color: var(--accent-secondary);
}

.btn-primary:hover {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.btn-secondary {
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-hover);
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.3);
}

/* Cards */
.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 16px;
}

.card-header {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

/* Form Controls */
.form-control {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 6px;
    padding: 8px 12px;
}

.form-control:focus {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.form-control::placeholder {
    color: var(--text-muted);
}

/* Navigation */
.sidebar {
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    width: 240px;
    min-height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    padding: 0;
}

.sidebar-brand {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-brand h2 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.sidebar-brand .subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.nav-menu {
    padding: 16px 0;
}

.nav-item {
    display: block;
    padding: 10px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.15s ease;
}

.nav-item:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
    text-decoration: none;
}

.nav-item.active {
    background-color: var(--bg-tertiary);
    color: var(--accent-primary);
    border-left: 2px solid var(--accent-primary);
}

.nav-item .nav-icon {
    margin-right: 12px;
    width: 16px;
    display: inline-block;
}

/* Main Content */
.main-content {
    margin-left: 240px;
    padding: 24px;
    min-height: 100vh;
}

.page-header {
    margin-bottom: 24px;
}

.page-title {
    font-size: 1.75rem;
    font-weight: 600;
    margin: 0 0 8px 0;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Mesh Grid */
.mesh-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.mesh-node {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    transition: all 0.15s ease;
}

.mesh-node:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.mesh-node.online {
    border-left: 3px solid var(--mesh-node-online);
}

.mesh-node.offline {
    border-left: 3px solid var(--mesh-node-offline);
    opacity: 0.7;
}

.mesh-node.root {
    border-left: 3px solid var(--mesh-node-root);
}

.mesh-node-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.mesh-node-name {
    font-weight: 600;
    font-size: 1rem;
}

.mesh-node-status {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 12px;
    background-color: var(--bg-tertiary);
}

.mesh-node-status.online {
    color: var(--mesh-node-online);
}

.mesh-node-status.offline {
    color: var(--mesh-node-offline);
}

.mesh-node-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.stat-item {
    background-color: var(--bg-tertiary);
    padding: 8px;
    border-radius: 4px;
}

.stat-label {
    font-size: 0.625rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.stat-value.db-low {
    color: var(--db-low);
}

.stat-value.db-medium {
    color: var(--db-medium);
}

.stat-value.db-high {
    color: var(--db-high);
}

/* Status indicators */
.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 6px;
}

.status-indicator.online {
    background-color: var(--accent-success);
    box-shadow: 0 0 8px var(--accent-success);
}

.status-indicator.offline {
    background-color: var(--text-muted);
}

.status-indicator.error {
    background-color: var(--accent-error);
    box-shadow: 0 0 8px var(--accent-error);
}

/* Tables */
.table {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.table th {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
}

.table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.table tr:last-child td {
    border-bottom: none;
}

.table tr:hover td {
    background-color: var(--bg-hover);
}

/* Validation */
.valid.modified:not([type=checkbox]) {
    outline: 1px solid var(--accent-success);
}

.invalid {
    outline: 1px solid var(--accent-error);
}

.validation-message {
    color: var(--accent-error);
    font-size: 0.875rem;
}

/* Error UI */
#blazor-error-ui {
    background: var(--accent-error);
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.3);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
    color: white;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, var(--accent-error);
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

.blazor-error-boundary::after {
    content: "An error has occurred."
}

/* Loading */
.loading-progress {
    position: relative;
    display: block;
    width: 8rem;
    height: 8rem;
    margin: 20vh auto 1rem auto;
}

.loading-progress circle {
    fill: none;
    stroke: var(--bg-tertiary);
    stroke-width: 0.6rem;
    transform-origin: 50% 50%;
    transform: rotate(-90deg);
}

.loading-progress circle:last-child {
    stroke: var(--accent-primary);
    stroke-dasharray: calc(3.141 * var(--blazor-load-percentage, 0%) * 0.8), 500%;
    transition: stroke-dasharray 0.05s ease-in-out;
}

.loading-progress-text {
    position: absolute;
    text-align: center;
    font-weight: bold;
    inset: calc(20vh + 3.25rem) 0 auto 0.2rem;
    color: var(--text-primary);
}

.loading-progress-text:after {
    content: var(--blazor-load-percentage-text, "Loading");
}

/* Utilities */
.text-muted {
    color: var(--text-muted) !important;
}

.text-success {
    color: var(--accent-success) !important;
}

.text-warning {
    color: var(--accent-warning) !important;
}

.text-danger {
    color: var(--accent-error) !important;
}

code {
    color: var(--accent-primary);
    background-color: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
}

/* Screen reader only class for accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus indicators for WCAG 2.4.7 */
*:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus {
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.4);
}

/* Enhanced contrast for WCAG AA compliance (4.5:1 minimum) */
.text-muted {
    color: #8b949e; /* Improved from #6e7681 */
}

.text-danger {
    color: #ff7b72; /* Improved from #f85149 */
}

/* Network status toast notifications */
.network-toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 24px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 10000;
    opacity: 0;
    transition: all 0.3s ease;
}

.network-toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.network-toast-success {
    border-left: 4px solid var(--accent-success);
}

.network-toast-warning {
    border-left: 4px solid var(--accent-warning);
}

.network-toast-error {
    border-left: 4px solid var(--accent-error);
}

.offline-banner {
    background: var(--accent-warning);
    color: #000;
    padding: 12px;
    text-align: center;
    font-weight: 500;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }

    .main-content {
        margin-left: 0;
    }

    .mesh-grid {
        grid-template-columns: 1fr;
    }
}

/* Loading spinner for progressive loading */
.loading-spinner {
    border: 4px solid var(--bg-tertiary);
    border-top: 4px solid var(--accent-primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

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