/* ==========================================================================
   Troubleshooting 101 — AIO Vend
   Page stylesheet (production-ready, elegant, resilient, responsive)
   ========================================================================== */

/* ------------------------------
   Design Tokens / Theme
   ------------------------------ */

   :root,
   [data-theme="light"] {
     color-scheme: light;
   
     /* Surfaces */
     --ts-bg: #f7f8fb;
     --ts-surface: #ffffff;
     --ts-elevated: #ffffff;
     --ts-backdrop: rgba(15, 23, 42, 0.4);
   
     /* Borders & Shadows */
     --ts-border: #e5e7eb;
     --ts-border-strong: #d1d5db;
     --ts-shadow-sm: 0 1px 2px rgba(2, 6, 23, 0.06), 0 1px 1px rgba(2, 6, 23, 0.04);
     --ts-shadow-md: 0 8px 24px rgba(2, 6, 23, 0.08), 0 2px 8px rgba(2, 6, 23, 0.06);
     --ts-shadow-lg: 0 18px 42px rgba(2, 6, 23, 0.12), 0 6px 18px rgba(2, 6, 23, 0.08);
   
     /* Text */
     --ts-text: #0b1220;
     --ts-muted: #6b7280;
   
     /* Brand / Accents */
     --ts-accent: #2563eb;
     --ts-accent-600: #1d4ed8;
     --ts-accent-50: #eef2ff;
   
     /* States */
     --ts-ok: #16a34a;
     --ts-warn: #d97706;
     --ts-bad: #dc2626;
   
     /* Focus ring (soft) */
     --ts-focus: color-mix(in oklab, var(--ts-accent) 25%, transparent);
   
     /* Rounding */
     --ts-radius-xs: 8px;
     --ts-radius-sm: 10px;
     --ts-radius: 12px;
     --ts-radius-lg: 16px;
     --ts-radius-xl: 24px;
   
     /* Spacing scale (fluid) */
     --ts-space-1: clamp(0.25rem, 0.25rem + 0.1vw, 0.35rem);
     --ts-space-2: clamp(0.5rem, 0.5rem + 0.2vw, 0.75rem);
     --ts-space-3: clamp(0.75rem, 0.7rem + 0.4vw, 1rem);
     --ts-space-4: clamp(1rem, 0.9rem + 0.6vw, 1.25rem);
     --ts-space-5: clamp(1.25rem, 1.1rem + 0.8vw, 1.5rem);
     --ts-space-6: clamp(1.5rem, 1.3rem + 1vw, 2rem);
   
     /* Typography */
     --ts-font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial,
       "Apple Color Emoji", "Segoe UI Emoji";
     --ts-lead: clamp(1rem, 0.95rem + 0.4vw, 1.125rem);
     --ts-h1: clamp(1.8rem, 1.4rem + 2.2vw, 2.6rem);
     --ts-h2: clamp(1.3rem, 1.1rem + 1.2vw, 1.6rem);
   
     /* Misc */
     --ts-safe-top: max(env(safe-area-inset-top, 0px), 0px);
     --ts-scrollbar: color-mix(in oklab, var(--ts-text) 40%, transparent);
   }
   
   [data-theme="dark"] {
     color-scheme: dark;
     --ts-bg: #0b1020;
     --ts-surface: #0f162f;
     --ts-elevated: #121a36;
     --ts-border: #1e284a;
     --ts-border-strong: #2a3867;
     --ts-text: #f2f6ff;
     --ts-muted: #9ca3af;
     --ts-accent: #7aa7ff;
     --ts-accent-600: #6696ff;
     --ts-accent-50: #0b1a3d;
     --ts-shadow-sm: 0 1px 2px rgba(2, 6, 23, 0.45);
     --ts-shadow-md: 0 10px 30px rgba(2, 6, 23, 0.55);
     --ts-shadow-lg: 0 24px 48px rgba(2, 6, 23, 0.6);
     --ts-focus: color-mix(in oklab, var(--ts-accent) 35%, transparent);
   }
   
   /* Respect High Contrast / Forced Colors */
   @media (forced-colors: active) {
     :root {
       --ts-border: CanvasText;
       --ts-border-strong: CanvasText;
       --ts-accent: Highlight;
       --ts-focus: Highlight;
     }
   }
   
   /* Fallbacks when color-mix() isn’t available */
   @supports not (color: color-mix(in oklab, white 10%, black)) {
     :root {
       --ts-focus: rgba(37, 99, 235, 0.25);
       --ts-scrollbar: rgba(0,0,0,0.35);
     }
   }
   
   /* ------------------------------
      Base / Utilities (scoped)
      ------------------------------ */
   
   .ts-container {
     container-type: inline-size;
     max-width: 1200px;
     margin-inline: auto;
     padding: var(--ts-space-5) clamp(1rem, 2vw, 1.25rem);
     color: var(--ts-text);
     background:
       linear-gradient(180deg, color-mix(in oklab, var(--ts-accent) 4%, transparent) 0%, transparent 18%),
       var(--ts-bg);
     accent-color: var(--ts-accent);
     scrollbar-gutter: stable both-edges;
   }
   
   .ts-container * { font-family: var(--ts-font-sans); }
   
   .ts-container a.underline {
     text-decoration: underline;
     text-underline-offset: 3px;
     text-decoration-thickness: 2px;
   }
   
   .ts-container :focus-visible {
     outline: 2px solid var(--ts-accent);
     outline-offset: 2px;
     box-shadow: 0 0 0 6px var(--ts-focus);
     border-radius: 6px;
   }
   
   .ts-container ::selection { background: color-mix(in oklab, var(--ts-accent) 18%, transparent); }
   
   /* Anchor jumps account for sticky toolbar */
   .ts-container :is(h2, h3, h4, [id]) { scroll-margin-top: calc(64px + var(--ts-safe-top)); }
   
   /* Screenreader utility (in case core.css isn't present) */
   .sr-only {
     position: absolute !important;
     width: 1px; height: 1px;
     padding: 0; margin: -1px;
     overflow: hidden; clip: rect(0,0,0,0);
     white-space: nowrap; border: 0;
   }
   .sr-only-focusable:focus,
   .sr-only-focusable:focus-visible {
     position: static !important;
     width: auto; height: auto;
     margin: 0; overflow: visible; clip: auto; white-space: normal;
   }
   
   /* Subtle :target highlight for anchored sections */
   .ts-container :target {
     animation: ts-target 1.2s ease-out 1;
   }
   @keyframes ts-target {
     0%   { box-shadow: 0 0 0 0 color-mix(in oklab, var(--ts-accent) 24%, transparent); }
     60%  { box-shadow: 0 0 0 10px color-mix(in oklab, var(--ts-accent) 12%, transparent); }
     100% { box-shadow: none; }
   }
   
   /* Scrollbars (unobtrusive) */
   .ts-container {
     scrollbar-width: thin;
     scrollbar-color: var(--ts-scrollbar) transparent;
   }
   .ts-container::-webkit-scrollbar { height: 10px; width: 10px; }
   .ts-container::-webkit-scrollbar-thumb {
     border-radius: 999px;
     background: var(--ts-scrollbar);
   }
   .ts-container::-webkit-scrollbar-track { background: transparent; }
   
   /* Typographic comfort */
   .ts-container :where(p, li) { line-height: 1.7; letter-spacing: 0.005em; }
   
   /* ------------------------------
      Hero
      ------------------------------ */
   
   .ts-hero {
     display: grid;
     grid-template-columns: 1.2fr 1fr;
     gap: var(--ts-space-6);
     align-items: center;
     margin: var(--ts-space-3) 0 var(--ts-space-4);
   }
   .ts-hero__copy .eyebrow {
     letter-spacing: .06em;
     text-transform: uppercase;
     color: var(--ts-muted);
     margin: 0 0 .25rem;
     display: inline-flex;
     align-items: center;
     gap: .4rem;
   }
   .ts-hero__copy h1 {
     font-size: var(--ts-h1);
     line-height: 1.15;
     margin: .1rem 0 .35rem;
   }
   .ts-hero__copy .lead {
     font-size: var(--ts-lead);
     line-height: 1.55;
     opacity: .95;
   }
   .ts-hero__actions {
     display: flex;
     gap: .5rem;
     flex-wrap: wrap;
     margin: .9rem 0 .25rem;
   }
   .ts-hero__actions .btn { min-width: 12rem; }
   
   .ts-hero__art {
     position: relative;
     min-height: 200px;
     height: clamp(180px, 28vw, 260px);
     border-radius: var(--ts-radius-xl);
     overflow: clip;
     isolation: isolate;
     background:
       radial-gradient(60% 60% at 20% 20%, color-mix(in oklab, var(--ts-accent) 14%, transparent), transparent 70%),
       radial-gradient(55% 55% at 80% 30%, color-mix(in oklab, var(--ts-accent) 10%, transparent), transparent 72%),
       linear-gradient(135deg, color-mix(in oklab, var(--ts-accent) 6%, transparent), transparent 60%);
     box-shadow: var(--ts-shadow-md);
   }
   .ts-hero__art .pulse,
   .ts-hero__art .ring {
     position: absolute; inset: 0;
     border-radius: var(--ts-radius-xl);
   }
   .ts-hero__art .pulse {
     background: radial-gradient(60% 60% at 50% 50%, color-mix(in oklab, var(--ts-accent) 18%, transparent), transparent 65%);
     filter: blur(10px);
     opacity: .6;
     animation: ts-pulse 5.5s ease-in-out infinite;
   }
   .ts-hero__art .ring {
     pointer-events: none;
     border: 1px dashed var(--ts-border);
     mask-image: radial-gradient(150% 150% at 50% 50%, black 30%, transparent 60%);
     opacity: .7;
   }
   @keyframes ts-pulse {
     0%, 100% { transform: scale(1); opacity: .6; }
     50% { transform: scale(1.03); opacity: .9; }
   }
   
   /* ------------------------------
      Toolbar (sticky)
      ------------------------------ */
   
   .ts-toolbar {
     position: sticky;
     top: calc(0.5rem + var(--ts-safe-top));
     z-index: 30;
     display: flex;
     gap: var(--ts-space-2);
     align-items: center;
     padding: var(--ts-space-2);
     border: 1px solid var(--ts-border);
     border-radius: var(--ts-radius);
     background: color-mix(in oklab, var(--ts-surface) 86%, transparent);
     backdrop-filter: saturate(1.2) blur(6px);
     -webkit-backdrop-filter: saturate(1.2) blur(6px);
     box-shadow: var(--ts-shadow-sm);
   }
   
   .ts-toolbar::after {
     /* subtle bottom edge so the toolbar reads as sticky over content */
     content: "";
     position: absolute;
     inset-inline: 0;
     bottom: -1px;
     height: 16px;
     pointer-events: none;
     background: linear-gradient(to bottom, rgba(0,0,0,0.06), transparent);
     opacity: .25;
   }
   
   .ts-toolbar .search-field {
     --sf-height: 2.75rem;
     --sf-pad-x: .9rem;
     --sf-pad-y: .5rem;
     flex: 1;
     min-width: 240px;
     height: var(--sf-height);
     display: flex;
     align-items: center;
     gap: .6rem;
     border: 1px solid var(--ts-border);
     padding: var(--sf-pad-y) var(--sf-pad-x);
     border-radius: calc(var(--ts-radius) - 2px);
     background: var(--ts-elevated);
     transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
   }
   .ts-toolbar .search-field:focus-within {
     border-color: var(--ts-accent);
     box-shadow: 0 0 0 4px var(--ts-focus);
   }
   .ts-toolbar .search-field i { color: var(--ts-muted); }
   .ts-toolbar .search-field input {
     flex: 1;
     min-width: 160px;
     border: 0; outline: 0;
     background: transparent; color: inherit;
     font-size: 1rem;
     line-height: 1.2;
     padding: .35rem 0;
     min-height: calc(var(--sf-height) - (var(--sf-pad-y) * 2));
   }
   .ts-toolbar .search-field input::placeholder { color: var(--ts-muted); opacity: .9; }
   
   /* Chip row: horizontal scroll on small screens with snap */
   .ts-toolbar .chip-row {
     display: flex;
     gap: .35rem;
     flex-wrap: wrap;
     overflow-x: auto;
     -webkit-overflow-scrolling: touch;
     scroll-snap-type: x proximity;
     padding-block-end: 2px;
   }
   .ts-toolbar .chip-row > * { scroll-snap-align: start; }
   
   .ts-toolbar .spacer { flex: 1; }
   
   .ts-toolbar .btn-row {
     display: flex;
     gap: .35rem;
     flex-wrap: wrap;
   }
   
   /* Pills / Chips (re-usable) */
   .chip {
     display: inline-flex;
     align-items: center;
     gap: .4rem;
     padding: .2rem .6rem;
     font-size: .85rem;
     border: 1px solid var(--ts-border);
     border-radius: 999px;
     background: linear-gradient(180deg, color-mix(in oklab, var(--ts-surface) 85%, transparent), transparent);
     color: inherit;
     white-space: nowrap;
     transition: transform .12s ease, background .2s ease, border-color .2s ease;
   }
   .chip.is-active {
     border-color: var(--ts-accent);
     background: color-mix(in oklab, var(--ts-accent) 12%, var(--ts-surface));
   }
   @media (hover:hover) {
     .chip:hover { transform: translateY(-1px); }
   }
   
   /* Buttons (local refinements without clobbering global .btn) */
   .ts-container .btn {
     --btn-h: 2.35rem;
     display: inline-flex; align-items: center; justify-content: center;
     gap: .35rem; height: var(--btn-h); line-height: var(--btn-h);
     padding: 0 .9rem; border-radius: 10px;
     border: 1px solid var(--ts-border);
     background: var(--ts-elevated);
     color: inherit; text-decoration: none; font-weight: 600; font-size: .95rem;
     transition: transform .08s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease, color .2s ease;
     box-shadow: var(--ts-shadow-sm);
     will-change: transform;
     touch-action: manipulation;
   }
   @media (hover:hover) {
     .ts-container .btn:hover { transform: translateY(-1px); }
   }
   .ts-container .btn:active { transform: translateY(0); }
   .ts-container .btn--small { --btn-h: 2rem; font-size: .9rem; }
   
   .ts-container .btn--primary {
     border-color: color-mix(in oklab, var(--ts-accent) 32%, var(--ts-border));
     background: linear-gradient(180deg, var(--ts-accent), var(--ts-accent-600));
     color: #fff;
   }
   .ts-container .btn--primary:hover { box-shadow: 0 6px 18px color-mix(in oklab, var(--ts-accent) 30%, transparent); }
   
   .ts-container .btn--secondary {
     border-color: var(--ts-border-strong);
     background: color-mix(in oklab, var(--ts-accent) 6%, var(--ts-elevated));
     color: inherit;
   }
   .ts-container .btn--ghost {
     background: transparent;
     border-color: var(--ts-border);
   }
   
   /* Theme toggle (in header) */
   .theme-toggle {
     display: inline-flex; align-items: center; justify-content: center;
     width: 2.25rem; height: 2.25rem; border-radius: 999px;
     border: 1px solid var(--ts-border);
     background: var(--ts-elevated);
     color: var(--ts-muted);
     transition: transform .08s ease, box-shadow .2s ease, border-color .2s ease;
   }
   @media (hover:hover) {
     .theme-toggle:hover { transform: translateY(-1px); box-shadow: var(--ts-shadow-sm); }
   }
   .theme-toggle:focus-visible { box-shadow: 0 0 0 4px var(--ts-focus); }
   
   /* ------------------------------
      Sections
      ------------------------------ */
   
   .ts-section { margin: var(--ts-space-5) 0; }
   .ts-section__head { margin-bottom: var(--ts-space-3); }
   .section__title {
     font-size: var(--ts-h2);
     display: flex; align-items: center; gap: .6rem;
   }
   .section__subtitle { color: var(--ts-muted); }
   
   /* Callout */
   .callout {
     display: grid;
     grid-template-columns: auto 1fr;
     gap: .75rem;
     align-items: start;
     border: 1px solid var(--ts-border);
     border-radius: var(--ts-radius);
     padding: .85rem .9rem;
     background: linear-gradient(180deg, color-mix(in oklab, var(--ts-accent) 8%, transparent), transparent);
   }
   .callout__icon {
     width: 36px; height: 36px;
     display: grid; place-items: center;
     border-radius: 10px;
     background: color-mix(in oklab, var(--ts-accent) 12%, var(--ts-surface));
     color: var(--ts-accent);
     border: 1px solid color-mix(in oklab, var(--ts-accent) 30%, var(--ts-border));
   }
   .callout--info {}
   
   /* ------------------------------
      Triage (process-of-elimination)
      ------------------------------ */
   
   .triage { display: grid; gap: var(--ts-space-2); }
   
   .triage .step {
     border: 1px solid var(--ts-border);
     border-radius: var(--ts-radius);
     background: var(--ts-elevated);
     padding: var(--ts-space-3);
     box-shadow: var(--ts-shadow-sm);
     transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
   }
   @media (hover:hover) {
     .triage .step:hover { border-color: var(--ts-border-strong); box-shadow: var(--ts-shadow-md); }
   }
   
   .triage .step__head {
     display: flex;
     align-items: center;
     gap: .6rem;
     flex-wrap: wrap;
   }
   
   .triage .pill {
     display: inline-flex; align-items: center; gap: .35rem;
     font-size: .85rem;
     border: 1px solid var(--ts-border);
     border-radius: 999px;
     padding: .15rem .55rem;
     color: var(--ts-muted);
     background: color-mix(in oklab, var(--ts-surface) 90%, transparent);
   }
   
   .triage .tags { display: flex; gap: .35rem; flex-wrap: wrap; }
   
   .triage .step__body { margin-top: .55rem; display: grid; gap: .5rem; }
   
   .triage .checklist {
     list-style: none; padding: 0; margin: 0;
     display: grid; gap: .35rem;
   }
   /* Checklist row layout */
   .triage .checklist li label {
     display: grid; grid-template-columns: auto 1fr;
     gap: .55rem; align-items: start;
   }
   /* Checkbox controls */
   .triage input[type="checkbox"] {
     inline-size: 1.05rem; block-size: 1.05rem;
     margin-top: .15rem;
     border-radius: 4px;
     accent-color: var(--ts-accent);
   }
   /* Row states */
   .triage .checklist li label:has(input:checked) span {
     text-decoration: line-through;
     opacity: .75;
   }
   .triage .checklist li label:has(input:focus-visible) {
     outline: 2px solid var(--ts-accent);
     outline-offset: 2px;
     border-radius: var(--ts-radius-xs);
   }
   .triage .actions { display: flex; gap: .4rem; flex-wrap: wrap; margin-top: .4rem; }
   
   /* Status tags */
   .status-ok    { color: var(--ts-ok);   border-color: color-mix(in oklab, var(--ts-ok) 40%, var(--ts-border)); }
   .status-warn  { color: var(--ts-warn); border-color: color-mix(in oklab, var(--ts-warn) 40%, var(--ts-border)); }
   .status-bad   { color: var(--ts-bad);  border-color: color-mix(in oklab, var(--ts-bad) 40%, var(--ts-border)); }
   
   /* ------------------------------
      Hardware Playbooks
      ------------------------------ */
   
   .hw-list {
     display: grid;
     gap: .8rem;
     /* fluid cards: 1–3 columns depending on width */
     grid-template-columns: repeat(auto-fit, minmax(min(360px, 100%), 1fr));
   }
   
   .hw-card {
     border: 1px solid var(--ts-border);
     border-radius: var(--ts-radius);
     background: var(--ts-elevated);
     box-shadow: var(--ts-shadow-sm);
     overflow: clip;
     transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
   }
   @media (hover:hover) {
     .hw-card:hover { border-color: var(--ts-border-strong); box-shadow: var(--ts-shadow-md); }
   }
   
   /* details/summary affordance */
   .hw-card summary {
     list-style: none;
     cursor: pointer;
     padding: .8rem .95rem;
     display: grid;
     grid-template-columns: 1fr auto;
     align-items: center;
     gap: .6rem;
   }
   .hw-card summary::-webkit-details-marker { display: none; }
   
   /* summary content row */
   .hw-card .summary-row {
     display: flex; align-items: center; gap: .6rem; flex-wrap: wrap;
   }
   .hw-card .badge { font-size: .8rem; color: var(--ts-muted); }
   
   /* rotate chevron on open */
   .hw-card .chev { transition: transform .2s ease; }
   details.hw-card[open] .chev { transform: rotate(180deg); }
   
   /* expanded content */
   .hw-card .hw-content {
     padding: .3rem .95rem .95rem;
     display: grid;
     gap: .75rem;
   }
   
   .hw-grid {
     display: grid;
     gap: .6rem;
     grid-template-columns: repeat(12, 1fr);
   }
   .hw-grid .block {
     grid-column: span 6;
     border: 1px dashed var(--ts-border);
     border-radius: 10px;
     padding: .7rem;
     background: color-mix(in oklab, var(--ts-surface) 92%, transparent);
   }
   .hw-grid .block h4 { margin: .1rem 0 .3rem; font-size: 1rem; }
   .hw-grid .block ul { margin: .2rem 0 0 1rem; }
   .hw-meta { display: flex; gap: .5rem; flex-wrap: wrap; }
   .hw-meta .chip { font-size: .85rem; }
   .hw-tools { display: flex; gap: .45rem; flex-wrap: wrap; }
   
   /* ------------------------------
      Notes
      ------------------------------ */
   
   #sessionNotes {
     width: 100%;
     min-height: 10rem;
     padding: .9rem 1rem;
     border: 1px solid var(--ts-border);
     border-radius: var(--ts-radius-sm);
     background: var(--ts-elevated);
     resize: vertical;
     transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
     font-size: 0.98rem;
     line-height: 1.6;
   }
   #sessionNotes:focus {
     border-color: var(--ts-accent);
     box-shadow: 0 0 0 4px var(--ts-focus);
   }
   
   /* Micro text */
   .muted { color: var(--ts-muted); }
   .small { font-size: .85rem; }
   
   /* ------------------------------
      CTA
      ------------------------------ */
   
   .ts-cta { margin: var(--ts-space-5) 0 var(--ts-space-6); }
   .ts-cta__card {
     display: grid;
     grid-template-columns: auto 1fr auto;
     gap: 1rem;
     align-items: center;
     border: 1px solid var(--ts-border);
     border-radius: var(--ts-radius);
     padding: 1rem;
     background: var(--ts-elevated);
     box-shadow: var(--ts-shadow-sm);
   }
   .ts-cta__card i {
     font-size: 1.5rem;
     color: var(--ts-accent);
   }
   .ts-cta__copy h3 { margin: 0 0 .25rem; }
   .ts-cta__copy p  { margin: 0; color: var(--ts-muted); }
   
   /* ------------------------------
      Footer (gentle polish)
      ------------------------------ */
   
   .footer {
     border-top: 1px solid var(--ts-border);
     background: linear-gradient(180deg, transparent, color-mix(in oklab, var(--ts-surface) 92%, transparent));
     padding: var(--ts-space-4) clamp(1rem, 2vw, 1.25rem);
     color: var(--ts-muted);
   }
   .footer__links { display: inline-flex; gap: .9rem; flex-wrap: wrap; }
   
   /* Icons align nicely with text */
   i.fa-solid, i.fa-regular, i.fa-brands { vertical-align: -2px; }
   
   /* Ensure media inside cards scales properly */
   .ts-container :where(img, video, svg) { max-width: 100%; height: auto; border-radius: 10px; }
   
   /* Defensive: prevent long tokens from breaking layout */
   .ts-container :where(code, .chip, .pill, .badge) { word-break: keep-all; }
   .ts-container :where(p, li, .lead, .section__subtitle) { overflow-wrap: anywhere; }
   
   /* ------------------------------
      Responsive
      ------------------------------ */
   
   @media (max-width: 1100px) {
     .ts-hero { grid-template-columns: 1fr; }
   }
   
   @media (max-width: 980px) {
     .hw-grid .block { grid-column: span 12; }
     .ts-cta__card { grid-template-columns: auto 1fr; }
   }
   
   @container (max-width: 780px) {
     .ts-toolbar { grid-template-columns: 1fr; flex-wrap: wrap; }
   }
   
   @media (max-width: 720px) {
     .ts-toolbar {
       align-items: stretch;
       flex-wrap: wrap;
       gap: .5rem;
     }
     .ts-toolbar .spacer { display: none; }
     .ts-hero__actions .btn { flex: 1 1 auto; min-width: unset; }
   }
   
   @media (max-width: 480px) {
     .ts-toolbar .btn-row { width: 100%; }
     .ts-toolbar .btn-row .btn { flex: 1 1 auto; }
     .ts-toolbar .search-field { min-width: 0; }
   }
   
   /* Touch targets slightly larger on coarse pointers */
   @media (pointer: coarse) {
     .ts-container .btn { --btn-h: 2.6rem; padding-inline: 1rem; }
     .theme-toggle { width: 2.5rem; height: 2.5rem; }
   }
   
   /* ------------------------------
      Motion & Transparency Preferences
      ------------------------------ */
   
   @media (prefers-reduced-motion: reduce) {
     * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
   }
   
   @media (prefers-contrast: more) {
     .ts-container :focus-visible { outline-width: 3px; }
     .ts-toolbar, .hw-card, .triage .step, #sessionNotes { border-color: var(--ts-border-strong); }
   }
   
   /* ------------------------------
      Print (one-page friendly)
      ------------------------------ */
   @media print {
     :root { color-scheme: light; }
     body { background: #fff !important; }
     .nav, .ts-toolbar, .theme-toggle, .footer, .ts-hero__art, .btn, .ts-cta { display: none !important; }
     .ts-container { padding: 0; max-width: none; }
     .ts-hero__copy h1 { margin-top: 0; }
     /* Expand all details for print */
     details.hw-card[open] .hw-content,
     details.hw-card > * { display: block !important; }
     details.hw-card > summary { border-bottom: 1px solid #ddd; }
     a::after { content: " (" attr(href) ") "; font-weight: normal; font-size: 0.85em; }
     .hw-card, .triage .step { break-inside: avoid; page-break-inside: avoid; }
   }
   
   /* ------------------------------
      Append-only local utilities
      ------------------------------ */
   
   /* Badge color helpers */
   .badge--ok   { color: var(--ts-ok); }
   .badge--warn { color: var(--ts-warn); }
   .badge--bad  { color: var(--ts-bad); }
   
   /* Theme-aware underline */
   a.underline { text-decoration-color: color-mix(in oklab, currentColor 70%, transparent); }
   
   /* Subtle section separators */
   .ts-section + .ts-section {
     border-top: 1px dashed var(--ts-border);
     padding-top: var(--ts-space-5);
   }