/* ==========================================================================
   EXCITER DASHBOARD - Responsive Modern Dark Theme (Fixed Bottom Dashboard)
   ========================================================================== */
:root {
    /* Vibrant green - primary accent, status good, active states */
    --accent-green: #22c55e;
    --accent-green-bright: #4ade80;
    --accent-green-dim: #16a34a;
    /* Error / alert */
    --status-err: #ff5252;
    --status-err-dim: #dc2626;
    /* Warning / amber */
    --status-warn: #f59e0b;
    --status-warn-dim: #eab308;
    /* Neutral / info */
    --status-neutral: #38bdf8;
    --status-neutral-dim: #0ea5e9;
    /* Dark palette */
    --bg-main: #111827;
    --bg-panel: #1f2937;
    --bg-card: #374151;
    --bg-card-hover: #4b5563;
    /* Text */
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-muted: #b0b8c4;
    --plp-pill-bg: #3a4452;
    --chart-inset: #2a313c;
    /* Informational text/labels (status notes, progress labels). Light value set in .light-theme. */
    --info-text: var(--status-neutral);
    /* Mode identity colours (overview Signal Chain page only). Light values set in .light-theme.
       Gateway intentionally reuses --accent-green / --accent-green-bright (brand). */
    --mode-exciter: #60a5fa;          --mode-exciter-hover: #93bbfd;
    --mode-translator: #fb923c;       --mode-translator-hover: #fdba74;
    --mode-standalone: #a78bfa;       --mode-standalone-hover: #c4b5fd;
    --mode-exciter-tint: rgba(96,165,250,0.10);
    --mode-translator-tint: rgba(251,146,60,0.10);
    --mode-standalone-tint: rgba(167,139,250,0.10);
    --mode-gateway-tint: rgba(34,197,94,0.10);
    /* Stronger (hover) variants of the mode tints. */
    --mode-exciter-tint-strong: rgba(96,165,250,0.22);
    --mode-translator-tint-strong: rgba(251,146,60,0.22);
    --mode-standalone-tint-strong: rgba(167,139,250,0.22);
    --mode-gateway-tint-strong: rgba(34,197,94,0.22);
    /* Borders */
    --border-subtle: #4b5563;
    --border-accent: var(--accent-green);
    /* Sidebar (DARK ISLAND — sidebar stays dark navy in BOTH themes, so these
       tokens are NOT overridden in .light-theme; see the .light-theme block). */
    --sidebar-bg: #0f172a;
    --sidebar-text: #94a3b8;
    --sidebar-text-active: #ffffff;
    --sidebar-hover: #1e293b;
    /* Active-item accent. Lives as its own token (not --accent-green) because the
       sidebar is a dark island: this MUST stay bright green in light theme, whereas
       --accent-green darkens. Same value as --accent-green in dark theme. */
    --sidebar-accent: #22c55e;
    /* Primary-action button family (theme-aware). Dark values = today's look,
       so dark-only products are visually unchanged. Light values softened
       (entry 011) so buttons sit in harmony on the light page, not as heavy
       dark blocks. Status dots keep --accent-green and stay vivid. */
    --btn-green-bg: var(--accent-green-dim);
    --btn-green-bg-hover: var(--accent-green);
    --btn-green-text: #06230f;
    --btn-green-text-hover: #06230f;
    --btn-neutral-bg: #4b5563;
    --btn-neutral-text: #ffffff;
    /* Sidebar footer/labels: PINNED readable colours (sidebar is a dark island,
       so these must NOT follow the theme tokens, which flip dark in light mode). */
    --sidebar-footer-h: #cbd5e1;
    --sidebar-footer-p: #94a3b8;
    --sidebar-footer-link: #7fb3d5;
    --sidebar-label: #7c8595;
    /* Legacy / UI */
    --primary: var(--accent-green);
    --primary-hover: var(--accent-green-dim);
    --font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
    /* Layout */
    --container-width: 1250px;
    --sidebar-width: 220px;
    --header-height: 64px;
    --dashboard-height: auto;

    /* ===== PLOT PALETTE (family, added 2026-08-11) ==============================
       Colours for the spectrum + eye canvases on the Measurements page. Present as
       DORMANT family tokens: only smod renders a Measurements page today, but the
       page is planned for other products, so the tokens live in the shared sheet
       rather than being hand-copied later (the exact mistake that motivated this
       whole stylesheet consolidation). Values are the instrument-plot palette; four
       of them already equal existing family tokens (trace=--status-neutral,
       hold=--status-warn, band=neutral@10%, eye-level near neutral) and are kept as
       separate names so a family colour change cannot silently restyle a scope plot.
       The plot field stays dark in BOTH themes on purpose: the eye is a density map
       whose floor must read as "no signal", which a dark field gives and a light one
       does not. Not overridden in .light-theme, deliberately. =================== */
    --plot-bg: #0b1220;
    --plot-grid: #1e293b;
    --plot-grid-zero: #334155;
    --plot-axis-label: #94a3b8;
    --plot-axis-title: #64748b;
    --plot-trace: #38bdf8;
    --plot-trace-hold: #f59e0b;
    --plot-trace-error: #eab308;
    --plot-marker: #f87171;
    --plot-band: rgba(56, 189, 248, 0.10);
    --plot-eye-level: rgba(57, 208, 255, 0.45);
    --plot-eye-decision: #a3e635;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-family);
}

html {
    font-size: 14px;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5;
    height: 100vh;
    overflow: hidden;
}

/* ==========================================================================
   LAYOUT GRID SYSTEM - Dashboard under header
   ========================================================================== */
.app-layout {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: var(--header-height) var(--dashboard-height) 1fr;
    grid-template-areas:
        "header header"
        "sidebar dashboard"
        "sidebar main";
    height: 100vh;
}

/* ==========================================================================
   HEADER
   ========================================================================== */
.app-header {
    grid-area: header;
    background: var(--bg-panel);
    border-bottom: 2px solid var(--accent-green);
    display: flex;
    align-items: center;
    padding: 0 24px;
    position: relative;
}

.app-header h1 {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent-green);
    margin-right: 12px;
    display: flex;
    align-items: center;
}

.app-header h1 .logo-bg {
    width: 180px;
    height: 64px;
    background: url(../images/logo.png) no-repeat left center;
    background-size: contain;
}

.app-header h2 {
    font-size: 16px;
    color: var(--accent-green);
    font-weight: 600;
    border-left: 1px solid var(--border-subtle);
    padding-left: 24px;
    margin-left: 12px;
}

.app-header h3 {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
    text-align: right;
    margin-left: auto;
    padding-left: 16px;
}

/* ==========================================================================
   SIDEBAR
   ========================================================================== */
.app-sidebar {
    grid-area: sidebar;
    background: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    z-index: 101;
    border-right: 1px solid var(--border-subtle);
    overflow: hidden;
}

.app-sidebar ul.items {
    list-style: none;
    margin-bottom: auto;
    padding: 12px 0;
    flex: 1;
    overflow-y: auto;
}

.app-sidebar li a {
    display: block;
    padding: 11px 16px;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
    border-radius: 0 6px 6px 0;
}

.app-sidebar li a:hover {
    background: var(--sidebar-hover);
    color: var(--sidebar-text-active);
}

.app-sidebar li.active a {
    background: transparent;
    color: var(--sidebar-text-active);
    border-left: 3px solid var(--sidebar-accent);
    font-weight: 600;
}

/* --- Sidebar group labels (Operations / Configuration / Admin) ---
   Added for ATSC 3.0 pages. Scoped by the .app-sidebar ancestor plus
   the .ov-group-label class, so these rules only affect <li> elements
   that opt in with class="ov-group-label". No existing pages in other
   products (7x, 2D Marble, ATSC 1.0) use this class, so adding these
   rules has zero visual or behavioral impact on them.
   The existing .app-sidebar li a and .app-sidebar li.active a rules
   require an <a> child; these label items have no <a>, so no collision. */
.app-sidebar li.ov-group-label {
    padding: 16px 16px 4px 16px;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 1.6px;
    text-transform: uppercase;
    color: var(--sidebar-label);
    border-left: 3px solid transparent;
    pointer-events: none;
    user-select: none;
}
.app-sidebar li.ov-group-label:first-child { padding-top: 6px; }

.sidebar-footer {
    padding: 16px;
    color: var(--sidebar-footer-p);
    font-size: 12px;
    line-height: 1.5;
    border-top: 1px solid var(--border-subtle);
}

.sidebar-footer h4 {
    color: var(--sidebar-footer-h);
    margin-bottom: 8px;
    font-size: 13px;
    font-weight: 600;
}

.sidebar-footer p {
    font-size: 12px;
    font-weight: 400;
    margin: 0;
}

.sidebar-footer .redbox-label {
    font-weight: 600;
    color: var(--sidebar-footer-h);
}

.sidebar-footer a {
    color: var(--sidebar-footer-link);
    font-weight: 500;
}

/* ==========================================================================
   MAIN CONTENT - Scrollable area (1250px centered)
   ========================================================================== */
.app-main {
    grid-area: main;
    padding: 20px 24px;
    background: var(--bg-main);
    overflow-y: auto;
    overflow-x: hidden;
    scroll-behavior: smooth;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.app-main > * {
    width: 100%;
    max-width: 1250px;
}

.app-main::-webkit-scrollbar {
    width: 8px;
}

.app-main::-webkit-scrollbar-track {
    background: var(--bg-main);
}

.app-main::-webkit-scrollbar-thumb {
    background: var(--border-subtle);
    border-radius: 4px;
}

.app-main::-webkit-scrollbar-thumb:hover {
    background: var(--bg-card-hover);
}

/* ==========================================================================
   FIXED DASHBOARD SUMMARY - Top of page, under header
   ========================================================================== */
.dashboard-fixed {
    grid-area: dashboard;
    background: var(--bg-panel);
    border-top: 2px solid var(--accent-green);
    padding: 8px 24px;
    z-index: 100;
    overflow: hidden;
    display: flex;
    justify-content: center;
}

.summary-dashboard {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 8px;
    width: 100%;
    max-width: 1250px;
    height: 100%;
}

.summary-card {
    background: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-subtle);
    padding: 6px 8px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 2px;
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
    min-height: 0;
}

.summary-card:hover {
    border-color: var(--bg-card-hover);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.summary-card:has(.value-err) {
    border-left: 3px solid var(--status-err);
    background: rgba(239, 68, 68, 0.08);
    animation: errPulseBg 2s ease-in-out infinite;
}

@keyframes errPulseBg {
    0%, 100% { background: rgba(239, 68, 68, 0.08); }
    50%      { background: rgba(239, 68, 68, 0.18); }
}

.summary-card:has(.value-warn) {
    border-left: 3px solid var(--status-warn);
    background: rgba(245, 158, 11, 0.08);
}

.summary-label-row {
    display: flex;
    align-items: center;
    gap: 4px;
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    flex-shrink: 0;
    transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.status-dot.status-ok {
    background-color: var(--accent-green);
    box-shadow: 0 0 4px rgba(34, 197, 94, 0.5);
}

.status-dot.status-err {
    background-color: var(--status-err);
    box-shadow: 0 0 4px rgba(239, 68, 68, 0.5);
}

.status-dot.status-warn {
    background-color: var(--status-warn);
    box-shadow: 0 0 4px rgba(245, 158, 11, 0.5);
}

.status-dot.status-neutral {
    background-color: var(--status-neutral);
    box-shadow: 0 0 4px rgba(56, 189, 248, 0.4);
}

.status-dot.status-off {
    background-color: var(--text-muted);
    box-shadow: 0 0 3px rgba(156, 163, 175, 0.3);
}

.summary-label {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.summary-value-wrapper {
    display: flex;
    align-items: baseline;
    gap: 2px;
    min-width: 0;
}

.summary-value {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.1;
    transition: color 0.2s ease;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.summary-value.value-ok { color: var(--accent-green); }
.summary-value.value-err { color: var(--status-err); }
.summary-value.value-warn { color: var(--status-warn); }
.summary-value.value-neutral { color: var(--status-neutral); }
.summary-value.value-muted { color: var(--text-muted); }
.summary-value.value-off { color: var(--text-muted); }

.summary-unit {
    font-size: 9px;
    font-weight: 500;
    color: var(--text-muted);
}

/* ==========================================================================
   STATUS ALERT STRIP
   ========================================================================== */
.content-page-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--accent-green);
    margin: 0 0 12px 0;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border-subtle);
}

.content-page-title:empty {
    display: none;
    margin: 0;
    padding: 0;
    border: none;
}

#status-alert-strip, .status-alert {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 13px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.status-alert-icon {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

#status-alert-strip.status-alert-ok, .status-alert-ok {
    background: rgba(34, 197, 94, 0.15);
    border: 1px solid rgba(34, 197, 94, 0.4);
    color: var(--accent-green);
}
#status-alert-strip.status-alert-ok .status-alert-icon, .status-alert-ok .status-alert-icon {
    background: var(--accent-green);
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.5);
}

#status-alert-strip.status-alert-warn, .status-alert-warn {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid rgba(245, 158, 11, 0.4);
    color: var(--status-warn);
}
#status-alert-strip.status-alert-warn .status-alert-icon, .status-alert-warn .status-alert-icon {
    background: var(--status-warn);
}

#status-alert-strip.status-alert-err, .status-alert-err {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: var(--status-err);
}
#status-alert-strip.status-alert-err .status-alert-icon, .status-alert-err .status-alert-icon {
    background: var(--status-err);
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.4);
}

#status-alert-detail, .status-alert-detail {
    color: var(--text-secondary);
    font-weight: 500;
}
.status-alert-detail:empty {
    display: none;
}

/* ==========================================================================
   CONTENT SECTIONS
   ========================================================================== */
.app-main h2 {
    color: var(--text-primary);
    font-size: 17px;
    font-weight: 600;
    margin: 20px 0 10px 0;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border-subtle);
}

.app-main h2:first-of-type {
    margin-top: 0;
}

.box {
    background: var(--bg-card);
    border-radius: 10px;
    border: 1px solid var(--border-subtle);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    padding: 14px;
    margin-bottom: 14px;
}

/* Grid system for content boxes */
.content-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.content-grid .box {
    margin-bottom: 0;
}

.content-grid-full {
    grid-column: 1 / -1;
}

/* ==========================================================================
   BOX ACCORDION HEADER
   ========================================================================== */
.box-header {
    padding: 10px 14px;
    background-color: var(--bg-card-hover);
    border-bottom: 1px solid var(--border-subtle);
    margin: -14px -14px 14px -14px;
    border-radius: 10px 10px 0 0;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--text-primary);
    transition: background-color 0.2s ease;
    user-select: none;
}

.box-header:hover {
    background-color: var(--border-subtle);
}

.box-header::after {
    content: '\25BC';
    font-size: 12px;
    color: var(--accent-green);
}

.box-header.has-error::after,
.box-header.has-error.collapsed::after {
    color: var(--status-err) !important;
}

.box-header.collapsed::after {
    content: '\25C0';
}

.box-header.collapsed {
    border-bottom: none;
    margin-bottom: -14px;
    border-radius: 10px;
}

.box-header .toggle-text {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
    background-color: var(--btn-green-bg);
    color: var(--btn-green-text-hover);
    padding: 4px 10px;
    border-radius: 6px;
    margin-left: auto;
    margin-right: 10px;
    transition: background-color 0.2s ease;
}

.box-header.collapsed .toggle-text {
    background-color: var(--btn-neutral-bg);
    color: var(--btn-neutral-text);
    border: 1px solid var(--border-subtle);
}

/* Accordion Specific Settings */
.app-main .sysset-accordion .box-header {
    border-radius: 10px 10px 0 0;
}
.app-main .sysset-accordion .box-header.collapsed {
    border-radius: 10px;
    margin-bottom: 0;
}
.app-main .sysset-accordion .box-content {
    display: none;
    padding: 14px;
    margin: 0 -14px -14px -14px;
    border-radius: 0 0 10px 10px;
    border-top: 1px solid var(--border-subtle);
}
.app-main .sysset-accordion .box-header:not(.collapsed) + .box-content {
    display: block;
}
.app-main .sysset-accordion .box-header.accordion-header-warning {
    background-color: rgba(239, 68, 68, 0.15);
    border-left: 4px solid var(--status-err);
}
.app-main .sysset-accordion .box-header.accordion-header-warning:hover {
    background-color: rgba(239, 68, 68, 0.22);
}
.app-main .sysset-accordion .box-header.accordion-header-warning::after {
    color: var(--status-err);
}

/* ==========================================================================
   TABLES & FORMS
   ========================================================================== */
table {
    width: 100%;
    border-collapse: collapse;
}

td {
    padding: 6px 8px;
    vertical-align: middle;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-subtle);
}

.app-main .box table td {
    border-bottom: 1px solid var(--border-subtle);
}
.app-main .box table tr:last-child td {
    border-bottom: none;
}

td:nth-child(odd) {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    letter-spacing: 0.4px;
    min-width: 130px;
    width: 1%;
    white-space: nowrap;
    background-color: transparent;
}

td:nth-child(even) {
    min-width: 0;
    width: auto;
}

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

/* Advanced Table Layouts */
.app-main .box table.table-layout-4col,
.app-main .box table.table-layout-dgv,
.app-main .box table.table-layout-freq,
.app-main .box table.table-layout-standard {
    table-layout: fixed;
    width: 100%;
    text-align: left;
}
.app-main .box table.table-layout-freq td:first-child,
.app-main .box table.table-layout-standard td:first-child {
    width: 260px;
    min-width: 260px;
    max-width: 260px;
    white-space: nowrap;
}
.app-main .box table.table-layout-4col td:first-child {
    width: 260px;
    min-width: 260px;
    max-width: 260px;
    white-space: nowrap;
}
.app-main .box table.table-layout-4col td:nth-child(2) {
    width: 220px;
    min-width: 220px;
    max-width: 220px;
}
.app-main .box table.table-layout-4col td:nth-child(3) {
    width: 260px;
    min-width: 260px;
    max-width: 260px;
    white-space: nowrap;
}
.app-main .box table.table-layout-dgv td:first-child {
    width: 260px;
    min-width: 260px;
    max-width: 260px;
    white-space: nowrap;
}
.app-main .box table.table-layout-dgv td:nth-child(2) {
    width: 100px;
    min-width: 100px;
    max-width: 100px;
}
.app-main .box table.table-layout-dgv td:nth-child(3) {
    width: 120px;
    min-width: 120px;
    max-width: 120px;
    white-space: nowrap;
}
.app-main .box table.table-layout-dgv td:nth-child(4) {
    width: 260px;
    min-width: 260px;
    max-width: 260px;
    white-space: nowrap;
}
.app-main .box table.table-layout-dgv td:nth-child(5) {
    width: 100px;
    min-width: 100px;
    max-width: 100px;
}
.app-main .box table.table-layout-dgv td:nth-child(6) {
    width: auto;
    min-width: 0;
}

/* Error highlighting */
tr.row-has-error td {
    background: rgba(239, 68, 68, 0.08);
}
tr.row-has-error td:nth-child(odd) {
    background: rgba(239, 68, 68, 0.12);
}

tr.header-row td {
    background-color: var(--bg-card-hover);
    color: var(--text-primary);
    font-weight: 700;
    font-size: 13px;
}

/* Log Export Styles */
.log-export-box td.log-export-label {
    min-width: 220px;
    width: auto;
    white-space: nowrap;
}
.log-export-box td.log-export-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Inputs */
input[type="text"],
input[type="password"],
input[readonly],
input:not([type]),
select {
    width: 100%;
    max-width: 90px;
    padding: 6px 8px;
    font-size: 13px;
    color: var(--text-secondary);
    background-color: var(--bg-panel);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    transition: all 0.2s ease;
    outline: none;
}

.app-main select {
    width: auto;
    min-width: 100px;
    max-width: 180px;
}

input:focus,
.app-main select:focus,
select:focus {
    border-color: var(--accent-green);
    box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.2);
}

input[readonly] {
    background-color: var(--bg-panel);
    border-color: var(--border-subtle);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: default;
}

/* Display-only select menus */
select.display-only-select:disabled {
    opacity: 1;
    color: var(--text-secondary);
    -webkit-text-fill-color: var(--text-secondary);
}
select.display-only-select:disabled.state-error {
    color: var(--status-err) !important;
    -webkit-text-fill-color: var(--status-err) !important;
    font-weight: bold !important;
}
select.display-only-select:disabled.state-ok {
    color: var(--accent-green) !important;
    -webkit-text-fill-color: var(--accent-green) !important;
    font-weight: bold !important;
}

/* Buttons */
input[type="button"].btn-modern,
input[type="submit"].btn-modern {
    background-color: var(--btn-green-bg);
    color: var(--btn-green-text);
    font-size: 13px;
    font-weight: 600;
    padding: 8px 18px;
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    outline: none;
    text-transform: none;
}

input[type="button"].btn-modern:hover,
input[type="submit"].btn-modern:hover {
    background-color: var(--btn-green-bg-hover);
    border-color: var(--btn-green-bg-hover);
    color: var(--btn-green-text-hover);
}

input[type="button"].btn-modern:active,
input[type="submit"].btn-modern:active {
    background-color: var(--btn-green-bg);
}

input[type="button"].btn-modern:disabled,
input[type="submit"].btn-modern:disabled {
    background-color: var(--bg-card);
    color: var(--text-muted);
    border-color: var(--border-subtle);
    cursor: not-allowed;
}

/* Unsaved reminder */
input[type="button"].btn-modern.is-unsaved:not(:disabled),
input[type="submit"].btn-modern.is-unsaved:not(:disabled) {
    background-color: var(--btn-green-bg) !important;
    border-color: var(--btn-green-bg-hover) !important;
    color: var(--btn-green-text-hover) !important;
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.35);
}

/* Cancel / secondary modal button — neutral, theme-aware (replaces hardcoded #64748b). */
input[type="button"].btn-modern.btn-cancel,
input[type="submit"].btn-modern.btn-cancel {
    background-color: var(--btn-neutral-bg);
    color: var(--btn-neutral-text);
    border-color: var(--border-subtle);
}
input[type="button"].btn-modern.btn-cancel:hover,
input[type="submit"].btn-modern.btn-cancel:hover {
    background-color: var(--btn-neutral-bg);
    border-color: var(--text-muted);
    color: var(--btn-neutral-text);
}

fieldset {
    border: none;
    display: flex;
    align-items: center;
    gap: 6px;
}

fieldset input {
    text-align: center;
}

.app-main .box table td fieldset {
    justify-content: flex-start;
}
.app-main .box table td fieldset input {
    text-align: left;
}

/* ==========================================================================
   DROPDOWN
   ========================================================================== */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropbtn-modern {
    background-color: var(--bg-card);
    color: var(--text-primary);
    font-size: 12px;
    font-weight: 600;
    padding: 6px 12px;
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
    outline: none;
    text-transform: none;
}

.dropdown:hover .dropbtn-modern {
    border-color: var(--accent-green);
    color: var(--accent-green-bright);
}

.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    background-color: var(--bg-card);
    min-width: 160px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    border-radius: 8px;
    border: 1px solid var(--border-subtle);
    z-index: 1000;
    overflow: hidden;
}

.dropdown-content a {
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 500;
    padding: 10px 14px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.dropdown-content a:hover {
    background-color: var(--sidebar-hover);
    color: var(--accent-green-bright);
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-content a svg {
    width: 16px;
    height: 16px;
    color: var(--text-muted);
}

.dropdown-content a:hover svg {
    color: var(--accent-green);
}

/* ==========================================================================
   MODAL
   ========================================================================== */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: var(--bg-card);
    margin: 10% auto;
    padding: 0;
    border-radius: 12px;
    border: 1px solid var(--border-subtle);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    width: 400px;
    animation: modalFadeIn 0.3s ease-out;
}

@keyframes modalFadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-header {
    background-color: var(--bg-card-hover);
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: 12px 12px 0 0;
}

.modal-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
}

.modal-header .close {
    color: var(--text-secondary);
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.2s;
}

.modal-header .close:hover {
    color: var(--status-err);
}

.modal-body {
    padding: 20px;
}

.modal-table {
    width: 100%;
}

.modal-table td {
    border: none;
    padding: 10px 5px;
    color: var(--text-primary);
}

.modal-table td:nth-child(odd) {
    width: 40%;
    text-align: right;
    padding-right: 15px;
    color: var(--text-secondary);
}

.modal-table td:nth-child(even) {
    width: 60%;
}

.modal-table input[type="text"],
.modal-table input[type="password"] {
    width: 100%;
    max-width: none;
    padding: 8px 10px;
    box-sizing: border-box;
    background-color: var(--bg-panel);
    border-color: var(--border-subtle);
    color: var(--text-primary);
}

.modal-footer {
    padding-top: 20px;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* ==========================================================================
   LOGIN PAGE SPECIFIC
   ========================================================================== */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - var(--header-height) - var(--dashboard-height) - 40px);
}

.login-box {
    width: 100%;
    max-width: 400px;
}

/* ==========================================================================
UTILITY CLASSES
========================================================================== */

/* Highlighted input fields (editable emphasis) */
.highlight {
  border-color: var(--accent-green) !important;
  background-color: rgba(34, 197, 94, 0.08);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.highlight:focus {
  background-color: rgba(34, 197, 94, 0.15);
  box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.3);
}

/* Clearfix for floated elements */
.clear::after {
  content: "";
  display: table;
  clear: both;
}

/* Responsive table wrapper for horizontal scroll on narrow screens */
.table-responsive-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* ==========================================================================
BUTTON VIEW DETAILS
========================================================================== */
.btn-view-details {
    display: inline-block;
    background-color: var(--bg-card-hover);
    color: var(--text-primary);
    font-size: 12px;
    font-weight: 600;
    padding: 8px 16px;
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    outline: none;
    margin-top: 12px;
}

.btn-view-details:hover {
    background-color: var(--btn-green-bg-hover);
    border-color: var(--btn-green-bg-hover);
    color: var(--btn-green-text-hover);
}

/* ==========================================================================
   HAMBURGER MENU TOGGLE
   ========================================================================== */
.menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: none;
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    cursor: pointer;
    padding: 0;
    margin-right: 12px;
    transition: border-color 0.2s ease;
}

.menu-toggle:hover {
    border-color: var(--accent-green);
}

.menu-toggle svg {
    width: 20px;
    height: 20px;
    color: var(--text-primary);
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   ========================================================================== */

/* 1080P and above (1920px+) */
@media (min-width: 1920px) {
    :root {
        --container-width: 1440px;
        --sidebar-width: 240px;
    }
    
    .summary-dashboard {
        grid-template-columns: repeat(12, 1fr);
    }
    
    .content-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Standard 1080P (1250px - 1919px) */
@media (min-width: 1250px) and (max-width: 1919px) {
    :root {
        --container-width: 1250px;
        --sidebar-width: 220px;
    }
    
    .summary-dashboard {
        grid-template-columns: repeat(6, 1fr);
    }
    
    .content-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Tablet landscape (1024px - 1279px) */
@media (min-width: 1024px) and (max-width: 1279px) {
    :root {
        --container-width: 100%;
        --sidebar-width: 200px;
    }
    
    .summary-dashboard {
        grid-template-columns: repeat(6, 1fr);
    }
    
    .content-grid {
        grid-template-columns: 1fr;
    }
}

/* Tablet portrait (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
    .app-layout {
        grid-template-columns: 1fr;
        grid-template-rows: var(--header-height) var(--dashboard-height) 1fr;
        grid-template-areas:
            "header"
            "dashboard"
            "main";
    }

    /* Overlay sidebar */
    .app-sidebar {
        position: fixed;
        top: 0;
        left: -220px;
        width: 220px;
        height: 100vh;
        z-index: 500;
        transition: left 0.3s ease;
        box-shadow: none;
    }

    .app-sidebar.sidebar-open {
        left: 0;
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.5);
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 499;
    }

    .sidebar-overlay.active {
        display: block;
    }

    .menu-toggle {
        display: flex;
    }

    .summary-dashboard {
        grid-template-columns: repeat(4, 1fr);
    }

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

/* Mobile (< 768px) */
@media (max-width: 767px) {
    :root {
    }

    .app-layout {
        grid-template-columns: 1fr;
        grid-template-rows: var(--header-height) var(--dashboard-height) 1fr;
        grid-template-areas:
            "header"
            "dashboard"
            "main";
    }

    /* Overlay sidebar */
    .app-sidebar {
        position: fixed;
        top: 0;
        left: -220px;
        width: 220px;
        height: 100vh;
        z-index: 500;
        transition: left 0.3s ease;
        box-shadow: none;
    }

    .app-sidebar.sidebar-open {
        left: 0;
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.5);
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 499;
    }

    .sidebar-overlay.active {
        display: block;
    }

    .menu-toggle {
        display: flex;
    }

    .summary-dashboard {
        grid-template-columns: repeat(3, 1fr);
    }

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

    .app-header {
        padding: 0 16px;
    }

    .app-main {
        padding: 16px;
    }

    .dashboard-fixed {
        padding: 8px 16px;
    }
}

/* Very small screens */
@media (max-width: 480px) {
  :root {
  }

  .summary-dashboard {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ==========================================================================
   GATEWAY STATUS - UTILIZATION BARS
   ========================================================================== */

/* Total Status - enhanced alarm display */
.total-status-grid {
    display: grid;
    grid-template-columns: auto 1fr auto 1fr;
    align-items: center;
    gap: 4px 12px;
    padding: 4px 0;
}

.total-status-grid .status-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    letter-spacing: 0.4px;
    white-space: nowrap;
}

.total-status-grid .status-value {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
}

.total-status-grid .status-value.alarm-ok {
    color: var(--accent-green);
}

.total-status-grid .status-value.alarm-overflow {
    color: var(--status-err);
    animation: alarmPulse 1.2s ease-in-out infinite;
}

.total-status-grid .frame-time-value {
    font-size: 15px;
    font-weight: 700;
    color: var(--status-neutral);
    font-variant-numeric: tabular-nums;
}

.total-status-grid .frame-time-unit {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-muted);
    margin-left: 3px;
}

@keyframes alarmPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.alarm-overflow-border {
    animation: alarmBorderPulse 1.2s ease-in-out infinite;
}

@keyframes alarmBorderPulse {
    0%, 100% { border-color: var(--status-err); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
    50% { border-color: var(--status-err); box-shadow: 0 0 12px 2px rgba(239, 68, 68, 0.35); }
}

/* Subframe container */
.subframe-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--accent-green);
    margin-bottom: 12px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border-subtle);
    letter-spacing: 0.3px;
}

/* PLP row layout — same style as subframe-header: label | bar | bitrate | pct */
.plp-row {
display: grid;
grid-template-columns: 56px 1fr auto auto auto;
gap: 2px 10px;
align-items: center;
padding: 6px 0;
border-bottom: 1px solid rgba(75, 85, 99, 0.4);
}

.plp-row:last-of-type {
    border-bottom: none;
}

/* PLP label (PLP0, PLP1, etc.) */
.plp-label {
    grid-row: 1;
    font-size: 12px;
    font-weight: 800;
    color: var(--text-secondary);
    letter-spacing: 0.8px;
    text-transform: uppercase;
    text-align: center;
    padding: 4px 0;
    border-radius: 4px;
    background: var(--plp-pill-bg);
}

/* Bar track (background) */
.plp-bar-track {
    grid-column: 2;
    grid-row: 1;
    position: relative;
    height: 18px;
    background: rgba(75, 85, 99, 0.35);
    border-radius: 4px;
    overflow: hidden;
}

/* Bar fill (colored portion) */
.plp-bar-fill {
    height: 100%;
    border-radius: 4px;
    min-width: 0;
    transition: width 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                background-color 0.4s ease;
    position: relative;
}

/* Bar fill color states — muted tones for dark theme readability */
.plp-bar-fill.bar-green {
    background: linear-gradient(90deg, #166534, #22c55e);
    opacity: 0.75;
}

.plp-bar-fill.bar-amber {
    background: linear-gradient(90deg, #92400e, #f59e0b);
    opacity: 0.78;
}

.plp-bar-fill.bar-red {
    background: linear-gradient(90deg, #991b1b, #ef4444);
    opacity: 0.78;
}

.plp-bar-fill.bar-muted {
    background: var(--bg-card-hover);
}

/* Bitrate text (right of bar, same line) */
.plp-row .plp-bitrate-text {
    grid-column: 3;
    grid-row: 1;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

/* Percentage text (right of bitrate, same line) */
.plp-pct-text {
    grid-column: 4;
    grid-row: 1;
    font-size: 12px;
    font-weight: 800;
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

.plp-pct-text.pct-green  { color: var(--accent-green); }
.plp-pct-text.pct-amber  { color: var(--status-warn); }
.plp-pct-text.pct-red     { color: var(--status-err); }
.plp-pct-text.pct-muted  { color: var(--text-muted); }

/* FULL indicator — beside pct text in the same row */
.plp-full-indicator {
grid-column: 5;
grid-row: 1;
font-size: 11px;
font-weight: 700;
color: var(--status-err);
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.35);
    padding: 1px 7px;
    border-radius: 4px;
    white-space: nowrap;
    display: none;
}

.plp-full-indicator.visible {
	display: inline-block;
	animation: alarmPulse 1.5s ease-in-out infinite;
}

/* PLP trend sparkline container — inline chart below each utilization bar.
 JS renderer writes SVG into this container on each 2-sec poll.
 Placed in grid row 2 (row 1 = bar + pct + FULL indicator) spanning the bar columns.
 Services displayed as left sidebar panel inside the SVG when present. */
.plp-trend-spark {
grid-column: 2 / -1;
grid-row: 2;
margin-top: 4px;
overflow: visible;
}

/* Hide trend container when PLP row is hidden */
.plp-row[style*="display: none"] .plp-trend-spark,
.plp-row[style*="display:none"] .plp-trend-spark {
	display: none;
}

/* Sparkline SVG element — fills container width.
ViewBox 700×120 with preserveAspectRatio="none" — stretches to match bar width.
When services exist, left margin widens (ML += svcBandW) to accommodate sidebar panel. */
.plp-trend-svg {
display: block;
width: 100%;
/* height set dynamically by JS via inline style — matches viewBox ratio */
}

/* Max/min envelope band — semi-transparent green fill (set inline by JS). */
.plp-trend-svg polygon {
  stroke: none;
}

/* Subframe header trend — matches bar height */
.subframe-header .plp-trend-spark {
grid-column: 2 / -1;
grid-row: 2;
margin-top: 4px;
}

/* Global header trend — extra tall for emphasis */
.global-header .plp-trend-spark {
grid-column: 2 / -1;
grid-row: 2;
margin-top: 4px;
}

/* Subframe header bar (total payload at top) */
.subframe-header {
    display: grid;
    grid-template-columns: 56px 1fr auto;
    gap: 0 10px;
    align-items: center;
    padding: 2px 0 10px 0;
    margin-bottom: 6px;
    border-bottom: 1px solid var(--border-subtle);
}

.subframe-header .summary-label {
    font-size: 11px;
    font-weight: 800;
    color: var(--accent-green);
    letter-spacing: 0.8px;
    text-transform: uppercase;
    text-align: center;
}

.subframe-header .plp-bar-track {
    height: 22px;
    border: 1px solid var(--border-subtle);
}

.subframe-header .plp-bar-fill {
    border-radius: 3px;
}

.subframe-header .plp-bitrate-text {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

.subframe-header .summary-pct {
    font-weight: 700;
    margin-left: 4px;
}

.subframe-header .summary-pct.pct-green { color: var(--accent-green); }
.subframe-header .summary-pct.pct-amber { color: var(--status-warn); }
.subframe-header .summary-pct.pct-red   { color: var(--status-err); }

/* Global payload bar (inside Total Status box) */
.global-header {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border-subtle);
    border-bottom: none;
    padding-bottom: 2px;
    margin-bottom: 0;
}

.global-header .plp-bar-track {
    height: 26px;
    border: 1px solid var(--border-subtle);
}

.global-header .summary-label {
    color: var(--status-neutral);
    font-size: 12px;
}

.global-header .plp-bitrate-text {
    font-size: 14px;
    font-weight: 800;
}

/* Responsive adjustments for utilization bars */
@media (max-width: 767px) {
.plp-row {
grid-template-columns: 48px 1fr auto auto;
}
    .plp-row .plp-bitrate-text {
        font-size: 11px;
    }
    .plp-pct-text {
        display: none;
    }
.subframe-header {
        grid-template-columns: 48px 1fr;
    }
    .subframe-header .plp-bitrate-text {
        grid-column: 1 / -1;
        text-align: center;
        margin-top: 4px;
    }
    .global-header {
        grid-template-columns: 48px 1fr;
    }
.global-header .plp-bitrate-text {
 grid-column: 1 / -1;
 text-align: center;
 margin-top: 4px;
 }
 }

/* ==========================================================================
SESSION TIMEOUT WARNING
========================================================================== */

#session-timeout-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10000;
}

.session-timeout-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
}

.session-timeout-dialog {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--bg-panel, #1e293b);
  border: 1px solid var(--status-warn, #f59e0b);
  border-radius: 12px;
  padding: 28px 32px;
  text-align: center;
  min-width: 320px;
  max-width: 420px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.session-timeout-icon {
  font-size: 40px;
  margin-bottom: 12px;
}

.session-timeout-dialog h3 {
  margin: 0 0 12px 0;
  color: var(--status-warn, #f59e0b);
  font-size: 18px;
}

.session-timeout-dialog p {
  margin: 0 0 8px 0;
  color: var(--text-secondary, #94a3b8);
  font-size: 14px;
  line-height: 1.5;
}

.session-timeout-dialog #session-countdown {
  font-weight: 700;
  color: var(--status-err, #ef4444);
  font-size: 16px;
}

.session-timeout-actions {
  margin-top: 20px;
  display: flex;
  gap: 12px;
  justify-content: center;
}

.session-timeout-actions .btn-modern {
  min-width: 120px;
}

/* =============================================================================
   Sprint 1 — dashboard bar mode-adaptive visibility + group separators
   Additive only. No existing rule, selector, or variable is modified.
   Shared with 2D and exciter UIs — these classes are new and will only apply
   where the new data-tile attribute is present on summary-card elements.
   ============================================================================= */

/* Marker class for tile-hidden state (reserved; current implementation uses
   inline style="display:none" set by applyBarTileVisibility for idempotency.
   Class kept for future use: allow CSS-only hiding via toggled class if we
   move to a transition/animation approach later.) */
.summary-card[data-tile].tile-hidden { display: none; }

/* Group-separator spacing for the bar.
   The bar is a flex row; group separation is a slightly larger left margin
   on the first tile of each group (applied via a data-group-first attribute
   that pages set on select tiles).
   Purely additive. Tiles without data-group-first are unaffected. */
.summary-card[data-group-first="input"]  { margin-left: 8px; }
.summary-card[data-group-first="output"] { margin-left: 8px; }
.summary-card[data-group-first="housekeeping"] { margin-left: 8px; }

/* =============================================================================
   Sprint 1 Increment 6 — Live Trends panel (Overview page only)
   Additive only. No existing rule, selector, or variable is modified.
   These classes are new (ov-trend-*); they only apply to the new panel
   container on Overview and do not affect the shared 2D / exciter UI.
   ============================================================================= */

/* Panel container — visual weight matches the existing ov-chain-card. */
.ov-trend-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 16px 0;
}

.ov-trend-panel:empty { display: none; }

/* Header row — small caps, dot, title, buffer-age label. */
.ov-trend-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.ov-trend-header .ov-trend-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--status-ok, #22c55e);
  box-shadow: 0 0 4px rgba(34, 197, 94, 0.5);
}

.ov-trend-header .ov-trend-title {
  color: var(--text-primary);
  font-weight: 600;
}

.ov-trend-header .ov-trend-sep {
  opacity: 0.5;
}

.ov-trend-header .ov-trend-age {
  color: var(--text-muted);
}

/* Grid of per-metric cards. Uses flex so cards auto-size to available
   width, wrapping to a new row only when needed. */
.ov-trend-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.ov-trend-card {
  flex: 1 1 200px;
  min-width: 180px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 10px 12px;
}

.ov-trend-label {
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.ov-trend-value {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 8px;
  white-space: nowrap;
}

.ov-trend-num {
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.ov-trend-unit {
  font-size: 10px;
  color: var(--text-muted);
  /* No text-transform: units carry meaningful case (Mbps / dB / dBm /
     dBc / MHz / %). Matches the signal chain's .ov-blk-primary .ov-u
     convention; avoids collapsing dB / dBm / dBc distinctions into the
     same upper-cased suffix. */
  letter-spacing: 0.04em;
}

/* The sparkline itself. Height fixed; width fills the card. */
.ov-trend-spark {
  display: block;
  width: 100%;
  height: 40px;
  stroke: var(--status-ok, #22c55e);
  stroke-width: 1.5;
  fill: none;
  stroke-linejoin: round;
  stroke-linecap: round;
}

/* N/A overlay wrapper -- anchors the overlay text above the sparkline.
   Positioned so overlay sits centered on the sparkline area. */
.ov-trend-spark-wrap {
  position: relative;
}

/* Shown on FSSI-affected charts (SNR, FWD%, UIMD, LIMD) when FSSI is
   active. Per v0.4 B4: overlay reads "N/A -- FSSI active" and line
   drawing is suppressed (handled by extractors returning null).
   pointer-events: none so the overlay never intercepts clicks. */
.ov-trend-na-overlay {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--text-muted, #8a8a8a);
  background: rgba(0, 0, 0, 0.04);
  pointer-events: none;
  text-transform: none;
}

/* When FSSI-active, tone down the card's current-value number. */
.ov-trend-card-na .ov-trend-num-na {
  color: var(--text-muted, #8a8a8a);
  font-weight: 500;
}

/* Min/max labels overlaid on the sparkline's right edge. Show the raw
   data range (not the minSpan-floored display range) so operators can
   always read the actual values — important when minSpan stretches a
   tiny real variation into a taller chart. pointer-events: none so the
   labels never intercept interaction with the svg. */
.ov-trend-spark-labels {
  position: absolute;
  top: 0;
  right: 2px;
  bottom: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  pointer-events: none;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 9px;
  line-height: 1;
  color: var(--text-secondary);
}

.ov-trend-label-max,
.ov-trend-label-min {
  /* Units are not repeated on these labels — the card's main value
     already shows the unit, and repeating it here adds clutter. */
  padding: 1px 2px;
  background: var(--bg-main);
  border-radius: 2px;
}

/* ==========================================================================
   CONTEXTUAL WARNING NOTES  (added 2026-05-31)
   Shared classes for the amber "this feature is gated / mode-restricted"
   messages that were previously hand-written inline on each page.
   Two variants:
     .warning-banner — block callout (tinted box) above a section
     .field-note     — small inline note appended after a field/label
   IMPORTANT: these classes intentionally do NOT set `display`. Visibility is
   toggled by page JS via `element.style.display = ''` (show) / 'none' (hide),
   which relies on the element's own inline `display:none` default. Adding
   `display` here would break that toggling (a cleared inline value would fall
   through to this rule). Keep `style="display:none"` on the element.
   ========================================================================== */
.warning-banner {
    padding: 8px 14px;
    margin-bottom: 8px;
    font-size: 12px;
    color: var(--status-warn);
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: 4px;
}
.field-note {
    font-size: 11px;
    color: var(--status-warn);
    margin-left: 8px;
}
/* Error state for .warning-banner — red instead of amber (e.g. expired cert).
   Toggle `is-error` in JS instead of setting inline colors. */
.warning-banner.is-error {
    color: var(--status-err);
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.2);
}

/* ==========================================================================
   SECONDARY (CANCEL) BUTTON  (added 2026-05-31)
   Neutral-grey companion to .btn-modern, for Cancel / dismiss actions (e.g. the
   account-settings modal). Use:  class="btn-modern btn-secondary"
   It only overrides the colour of .btn-modern; size/shape/hover come from
   .btn-modern. Theme-aware via --bg-card-hover.
   ========================================================================== */
input[type="button"].btn-secondary,
input[type="submit"].btn-secondary {
    background-color: var(--bg-card-hover);
}
input[type="button"].btn-secondary:hover,
input[type="submit"].btn-secondary:hover {
    background-color: var(--border-subtle);
    border-color: var(--border-subtle);
}

/* ==========================================================================
   PROGRESS BARS  (added 2026-05-31)
   Restart / reset / firmware-update progress. The bar fill is styled via the
   browser pseudo-elements (the plain `color` property does NOT colour a
   <progress> fill in Chromium/WebKit). Fill colour matches the info-text notes
   shown beside each bar. Theme-aware via --info-text.
   ========================================================================== */
progress.aw-progress {
    width: 100%;
    height: 24px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    border: none;
    border-radius: 4px;
    overflow: hidden;
    background: var(--bg-card);
}
progress.aw-progress::-webkit-progress-bar { background: var(--bg-card); border-radius: 4px; }
progress.aw-progress::-webkit-progress-value { background: var(--info-text); border-radius: 4px; }
progress.aw-progress::-moz-progress-bar { background: var(--info-text); }

/* ============================================================================
   LIGHT THEME  (entry 010 — additive, owner-approved palette "Concept C balanced")
   ----------------------------------------------------------------------------
   Activated by adding class "light-theme" to the root <html> element. Default
   (no class) = dark theme above. This block ONLY overrides token VALUES; it adds
   no new selectors that affect dark mode and changes nothing in :root.

   Design intent (owner-approved, comfort-contrast — AA floor, NOT maximum):
     - Page is soft grey (#e8ebf0), NOT white — reduces glare/eye-fatigue.
     - Text is dark slate (#2a3340), NOT pure black — softer on the eyes.
     - Status colours are muted, not neon. All measured AA on their real surface.

   DARK ISLAND: the sidebar stays dark navy in BOTH themes, so --sidebar-bg/-text/
   -text-active/-hover and --sidebar-accent are deliberately NOT overridden here —
   they inherit their :root (dark) values. --sidebar-accent stays bright green.

   CSS owns colour; JS owns identity (entry 008) — so the mode-* overrides below
   recolour the overview wizard/chips automatically with ZERO JS change.
   ============================================================================ */
:root.light-theme {
    /* Green - primary accent / status good / active */
    --accent-green: #0f7034;
    --accent-green-bright: #126e30;
    --accent-green-dim: #0c5a2a;
    /* Error / alert */
    --status-err: #b5302a;
    --status-err-dim: #8f231e;          /* darker companion to --status-err */
    /* Warning / amber */
    --status-warn: #8f4a08;
    --status-warn-dim: #7c4106;         /* darker companion to --status-warn */
    /* Neutral / info */
    --status-neutral: #0a5f8f;
    --status-neutral-dim: #084b70;      /* darker companion to --status-neutral */
    /* Light palette surfaces */
    --bg-main: #dde2e9;                 /* soft grey page, NOT white */
    --bg-panel: #eaeef3;                /* card surface, gentle off-white */
    --bg-card: #d8dee6;                 /* inset/chip surface */
    --bg-card-hover: #cbd2dc;
    /* Text */
    --text-primary: #2a3340;            /* dark slate, NOT pure black */
    --text-secondary: #3a4452;
    --text-muted: #525b6a;
    --plp-pill-bg: #cdd4de;
    --chart-inset: #ccd3dd;
    /* --info-text inherits the :root link to --status-neutral → resolves to #0a5f8f.
       Not re-declared here on purpose (the link is theme-agnostic). */
    /* Mode identity colours (overview Signal Chain page). Gateway reuses --accent-green. */
    --mode-exciter: #15598f;          --mode-exciter-hover: #1f6fb0;
    --mode-translator: #9a420a;       --mode-translator-hover: #c8590f;
    --mode-standalone: #5b3da8;       --mode-standalone-hover: #6f4dc6;
    --mode-exciter-tint: rgba(21,89,143,0.10);
    --mode-translator-tint: rgba(154,66,10,0.10);
    --mode-standalone-tint: rgba(91,61,168,0.10);
    --mode-gateway-tint: rgba(15,112,52,0.10);
    --mode-exciter-tint-strong: rgba(21,89,143,0.22);
    --mode-translator-tint-strong: rgba(154,66,10,0.22);
    --mode-standalone-tint-strong: rgba(91,61,168,0.22);
    --mode-gateway-tint-strong: rgba(15,112,52,0.22);
    /* Light button family: soft green + dark-green text (Strategy 2); soft grey
       neutral. These keep white-on-dark NOT used here — light uses dark text. */
    --btn-green-bg: #8fcfa8;
    --btn-green-bg-hover: #7bc098;
    --btn-green-text: #06230f;
    --btn-green-text-hover: #06230f;
    --btn-neutral-bg: #d4d9e1;
    --btn-neutral-text: #3a4452;
    /* NOTE: --sidebar-footer-*, --sidebar-label are intentionally NOT redefined
       here — the sidebar is a dark island, so they keep their pinned :root values. */
    /* Borders */
    --border-subtle: #cdd3dc;
    /* --border-accent inherits :root link to --accent-green → resolves to #0f7034. */
    /* Sidebar tokens: NOT overridden (dark island). --sidebar-accent stays #22c55e. */
    /* --primary / --primary-hover inherit :root links to --accent-green(-dim). */
}

/* ============================================================================
   THEME TOGGLE + UTILITY CLUSTER  (entry 010 — additive, light-theme feature)
   ----------------------------------------------------------------------------
   A header control to switch dark/light. Grouped with the Admin dropdown in a
   "utility cluster" so the two read as one controls zone on the right edge.
   Styling: faint green fill + green text/icon + green border (owner-approved
   "Option 1+2"). Wording names the DESTINATION ("Light Mode"/"Dark Mode") with
   a matching sun/moon icon. Collapses to icon-only at narrow widths.

   NOTE: the cluster must NOT set overflow:hidden — .dropdown-content is
   position:absolute and would be clipped. Cluster is transparent/no-clip.
   ============================================================================ */

/* Cluster wraps the toggle + the existing Admin dropdown <h3> contents. */
/* The cluster is a visible "controls" panel: subtle card background, border,
   rounded, slight lift — so the toggle + Admin read as ONE unit (owner-approved
   "3a"). It does NOT clip (dropdown-content is absolute and must escape). */
.utility-cluster {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 9px;
    padding: 4px 6px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.18);
}
/* Thin divider between the toggle and the Admin dropdown inside the cluster. */
.utility-divider {
    width: 1px;
    height: 22px;
    background: var(--border-subtle);
    flex-shrink: 0;
}
/* Inside the cluster, flatten the toggle + Admin so they read as cluster items,
   not standalone buttons. They keep their colour but drop their own box. */
.utility-cluster .theme-toggle {
    background: transparent;
    border: 1px solid transparent;
    height: 30px;
    padding: 0 10px;
}
.utility-cluster .theme-toggle:hover {
    background: var(--mode-gateway-tint);
    border-color: var(--accent-green);
}
.utility-cluster .dropbtn-modern {
    background: transparent;
    border: 1px solid transparent;
}
.utility-cluster .dropdown:hover .dropbtn-modern {
    border-color: var(--accent-green);
}
/* The header <h3> already has margin-left:auto (pushes it to the right edge).
   We keep that and just lay out the cluster inside it, right-aligned. */
.app-header h3.has-toggle { display: flex; align-items: center; justify-content: flex-end; }

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    height: 34px;
    padding: 0 12px;
    border-radius: 6px;
    cursor: pointer;
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
    flex-shrink: 0;
    background: var(--mode-gateway-tint);
    border: 1px solid var(--accent-green);
    color: var(--accent-green);
    transition: background 0.15s ease, border-color 0.15s ease;
}
.theme-toggle:hover { background: var(--bg-card-hover); }
.theme-toggle svg { width: 16px; height: 16px; color: var(--accent-green); }

/* Icon + label swap by theme. Default (dark) shows "Light Mode" + sun
   (the destination); .light-theme shows "Dark Mode" + moon. */
.theme-toggle .tt-sun  { display: inline-flex; }
.theme-toggle .tt-moon { display: none; }
.theme-toggle .tt-to-light { display: inline; }
.theme-toggle .tt-to-dark  { display: none; }
:root.light-theme .theme-toggle .tt-sun  { display: none; }
:root.light-theme .theme-toggle .tt-moon { display: inline-flex; }
:root.light-theme .theme-toggle .tt-to-light { display: none; }
:root.light-theme .theme-toggle .tt-to-dark  { display: inline; }

/* Smooth theme transition on the big surfaces. */
body, .app-header, .app-sidebar, .scard, .panel, .card {
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

/* Narrow widths: collapse the toggle to icon-only (drop the text label). */
@media (max-width: 600px) {
    .theme-toggle .tt-label { display: none; }
    .theme-toggle { padding: 0 9px; }
}