:root {
    --tf-bg: #f4f5f7;
    --tf-surface: #ffffff;
    --tf-border: #dfe2e6;
    --tf-text: #1d2329;
    --tf-muted: #5f6b76;
    --tf-sidebar: #1b2229;
    --tf-sidebar-text: #c9d1d9;
    --tf-accent: #1f6feb;
    --tf-online: #1a7f37;
    --tf-online-bg: #e6f4ea;
    --tf-offline: #b42318;
    --tf-offline-bg: #fdecea;
    --tf-unknown: #5f6b76;
    --tf-unknown-bg: #eef0f2;
    --tf-warning-bg: #fff8e1;
    --tf-warning-border: #f0d58c;
}

html, body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--tf-bg);
    color: var(--tf-text);
}

a, .btn-link {
    color: var(--tf-accent);
}

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

.btn:focus-visible, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.2rem rgba(31, 111, 235, 0.35);
}

h1:focus {
    outline: none;
}

code, .mono {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.875em;
}

code {
    color: inherit;
}

/* Page structure */

.page-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.page-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.page-subtitle {
    color: var(--tf-muted);
    margin: 0.25rem 0 0;
}

.back-link {
    display: inline-block;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
    text-decoration: none;
}

.panel {
    background: var(--tf-surface);
    border: 1px solid var(--tf-border);
    border-radius: 6px;
    margin-bottom: 1.25rem;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--tf-border);
}

.panel-header h2 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
}

.panel-empty {
    padding: 1.5rem 1rem;
    color: var(--tf-muted);
}

/* Summary statistics */

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.stat {
    background: var(--tf-surface);
    border: 1px solid var(--tf-border);
    border-radius: 6px;
    padding: 0.875rem 1rem;
}

.stat-label {
    display: block;
    color: var(--tf-muted);
    font-size: 0.8125rem;
}

.stat-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.stat-value small {
    font-size: 1rem;
    font-weight: 400;
    color: var(--tf-muted);
}

/* Tables */

.data-table {
    margin: 0;
}

.data-table th {
    color: var(--tf-muted);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    white-space: nowrap;
}

.data-table th, .data-table td {
    padding: 0.625rem 1rem;
    vertical-align: middle;
}

.data-table tbody tr:last-child td {
    border-bottom: 0;
}

.data-table .secondary {
    display: block;
    color: var(--tf-muted);
    font-size: 0.8125rem;
}

.search-input {
    max-width: 22rem;
}

/* Status indicators */

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.125rem 0.5rem;
    border-radius: 999px;
    font-size: 0.8125rem;
    font-weight: 500;
    white-space: nowrap;
}

.status-pill::before {
    content: "";
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: currentColor;
}

.status-online {
    color: var(--tf-online);
    background: var(--tf-online-bg);
}

.status-offline {
    color: var(--tf-offline);
    background: var(--tf-offline-bg);
}

.status-unknown {
    color: var(--tf-unknown);
    background: var(--tf-unknown-bg);
}

.service-status {
    display: inline-flex;
    gap: 0.75rem;
    margin-left: 0.5rem;
    font-size: 0.8125rem;
    color: var(--tf-muted);
}

.service-dot {
    display: inline-block;
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    margin-right: 0.25rem;
    vertical-align: 0.05em;
}

.service-dot.status-online { background: var(--tf-online); }
.service-dot.status-offline { background: var(--tf-offline); }
.service-dot.status-unknown { background: #aab2bb; }

/* Definition lists on the device page */

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(24rem, 100%), 1fr));
    gap: 1.25rem;
}

.detail-list {
    display: grid;
    grid-template-columns: minmax(8rem, 11rem) 1fr;
    margin: 0;
}

.detail-list dt, .detail-list dd {
    padding: 0.5rem 1rem;
    margin: 0;
    border-bottom: 1px solid var(--tf-border);
    overflow-wrap: anywhere;
}

.detail-list dt {
    color: var(--tf-muted);
    font-weight: 500;
}

.detail-list dt:last-of-type, .detail-list dd:last-of-type {
    border-bottom: 0;
}

.notice-warning {
    display: inline-block;
    background: var(--tf-warning-bg);
    border: 1px solid var(--tf-warning-border);
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

.device-tabs {
    margin-bottom: 1.25rem;
}

/* Template defaults kept for forms and error boundaries */

.valid.modified:not([type=checkbox]) {
    outline: 1px solid var(--tf-online);
}

.invalid {
    outline: 1px solid var(--tf-offline);
}

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

.blazor-error-boundary {
    background: #b32121;
    padding: 1rem;
    color: white;
}

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

/* Remote access tabs */

.remote-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.75rem;
    margin-bottom: 0.75rem;
}

.remote-message {
    color: var(--tf-muted);
    font-size: 0.875rem;
}

.remote-actions {
    display: flex;
    gap: 0.5rem;
    margin-left: auto;
}

.remote-state {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.remote-state::before {
    content: "";
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: #aab2bb;
}

.remote-state-connected::before { background: var(--tf-online); }
.remote-state-connecting::before { background: #d4a72c; }
.remote-state-failed { color: var(--tf-offline); }
.remote-state-failed::before { background: var(--tf-offline); }

.terminal-surface {
    height: max(24rem, calc(100vh - 19rem));
    padding: 0.5rem;
    background: #0d1117;
    border-radius: 6px;
    overflow: hidden;
}

.dashboard-frame {
    display: block;
    width: 100%;
    height: max(28rem, calc(100vh - 19rem));
    border: 1px solid var(--tf-border);
    border-radius: 6px;
    background: #fff;
}

.screen-mode {
    font-size: 0.8125rem;
    font-weight: 500;
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
    background: var(--tf-unknown-bg);
}

.screen-surface {
    height: max(24rem, calc(100vh - 19rem));
    background: #0d1117;
    border-radius: 6px;
    overflow: hidden;
}

.screen-surface-idle:empty {
    display: none;
}

/* Sessions */

.stat-link {
    color: inherit;
    text-decoration: none;
}

.stat-link:hover {
    border-color: var(--tf-accent);
}

.capacity-meter {
    height: 0.375rem;
    margin-top: 0.5rem;
    border-radius: 999px;
    background: var(--tf-unknown-bg);
    overflow: hidden;
}

.capacity-meter span {
    display: block;
    height: 100%;
    background: var(--tf-online);
}

.capacity-full span {
    background: var(--tf-offline);
}