/* spinal/ — shared tokens, type, shell and every sp-* component.
   Section styles live in css/<section>.css and must use their own prefix (an-, tq-, us-, ts-, cx-, pp-, qz-). */

@font-face{font-family:'NTF Mono';src:url('../../fonts/jetbrains-mono.woff2') format('woff2');font-weight:400 500;font-display:swap}

/* ------------------------------------------------------------------ tokens (NTF Anaesthesia design system, light only) */
body.spinal-app{
  --sp-bg:#f7f5ef;--sp-surface:#f7f5ef;--sp-surface-2:#eee9df;
  --sp-ink:#272722;--sp-ink-2:#504e47;--sp-muted:#55534d;--sp-line:#d7d2c8;--sp-line-strong:#8f8574;
  --sp-accent:#633d3c;--sp-on-accent:#fffaf0;--sp-accent-soft:#e8ded7;--sp-focus:#633d3c;
  --sp-key:#633d3c;--sp-key-bg:#eee9df;
  --sp-danger:#a12a1c;--sp-danger-bg:#fbebe7;
  --sp-warn:#7a4f00;--sp-warn-bg:#fbf1db;
  --sp-ok:#2f6b34;--sp-ok-bg:#e7f2e5;
  --sp-pearl:#7c4640;--sp-pearl-bg:#efe6e0;
  --sp-policy:#5a5650;--sp-policy-bg:#efede8;
  --sp-t1:#55534d;--sp-t1-bg:#eee9df;--sp-t2:#633d3c;--sp-t2-bg:#efe6e0;--sp-t3:#4b2e2d;--sp-t3-bg:#e8ded7;
  --sp-serif:'NTF Serif','Fraunces',Georgia,serif;
  --sp-sans:'NTF Sans',Inter,Arial,sans-serif;
  --sp-mono:'NTF Mono','JetBrains Mono',ui-monospace,Menlo,monospace;
  /* anatomy plate (same in both themes) */
  --an-plate:#f4ece1;--an-ink:#2b1e18;--an-skin:#e7c0a3;--an-fat:#f2dcc8;--an-lig-supra:#d8c49b;--an-lig-inter:#e2d3b0;
  --an-flavum:#e2b64a;--an-epifat:#f6e6b8;--an-vein:#5a2a3a;--an-dura:#b4a3c4;--an-arachnoid:#d9cfe3;--an-csf:#cfe4ea;
  --an-bone:#ece2cc;--an-cortex:#b6a684;--an-cord:#efd2bb;--an-root:#e8c4a6;--an-root-line:#a85f37;
  --an-needle:#a9adb6;--an-needle-edge:#2f3035;--an-warn:#9b2b1a;--an-cue:#8f431d;--an-pill:rgba(251,247,241,.93);
  /* ultrasound (same in both themes) */
  --us-bg:#000000;--us-bone:#e8e8e8;--us-dura:#d0d0d0;--us-csf:#050505;--us-needle:#f5f5f5;
  --us-label:#ffffff;--us-label-bg:#1a1a1a;--us-hi:#ffd166;--us-scale:#9a9a9a;--us-warn:#ff8a7a;

  background:var(--sp-bg);color:var(--sp-ink);font:17px/1.65 var(--sp-sans);
  -webkit-text-size-adjust:100%;text-size-adjust:100%;
}
:root[data-theme=dark] body.spinal-app{
  --sp-bg:#15171a;--sp-surface:#1c1f23;--sp-surface-2:#24282d;
  --sp-ink:#ecebe7;--sp-ink-2:#d2d4d7;--sp-muted:#aeb3ba;--sp-line:#30343a;--sp-line-strong:#6d727a;
  --sp-accent:#e8aaa6;--sp-on-accent:#15171a;--sp-accent-soft:#35262a;--sp-focus:#f2c46d;
  --sp-key:#7fd3cb;--sp-key-bg:#182725;
  --sp-danger:#ff9d8f;--sp-danger-bg:#3b1e1b;
  --sp-warn:#e7b75a;--sp-warn-bg:#33291a;
  --sp-ok:#9bd59b;--sp-ok-bg:#1b2e1d;
  --sp-pearl:#b9b2ff;--sp-pearl-bg:#252340;
  --sp-policy:#c9c1b6;--sp-policy-bg:#2a2622;
  --sp-t1:#9bd59b;--sp-t1-bg:#1b2e1d;--sp-t2:#9cc6f6;--sp-t2-bg:#172a3e;--sp-t3:#b9b2ff;--sp-t3-bg:#252340;
}
:root[data-theme=dark] body.spinal-app .ntf-header{background:var(--sp-bg);color:var(--sp-ink);border-bottom-color:var(--sp-line)}
:root[data-theme=dark] body.spinal-app .ntf-logo img{filter:brightness(0) invert(1)}
:root[data-theme=dark] body.spinal-app .ntf-header :is(.ntf-contact,.ntf-mobile-toggle){color:var(--sp-ink)}
:root[data-theme=dark] body.spinal-app .ntf-contact:hover{background:var(--sp-surface-2)}
:root[data-theme=dark] body.spinal-app .ntf-nav>a[aria-current=page],:root[data-theme=dark] body.spinal-app .ntf-menu:has(a[aria-current=page])>summary{color:var(--sp-accent)}
:root[data-theme=dark] body.spinal-app .ntf-header :is(a,button,summary):focus-visible{outline-color:var(--sp-focus)}
:root[data-theme=dark] body.spinal-app .ntf-menu-panel{background:var(--sp-surface);border-color:var(--sp-line);box-shadow:none;color:var(--sp-ink)}
:root[data-theme=dark] body.spinal-app .ntf-menu-panel a:hover,:root[data-theme=dark] body.spinal-app .ntf-menu-panel a[aria-current=page]{background:var(--sp-surface-2)}
:root[data-theme=dark] body.spinal-app .ntf-menu-panel .ntf-menu-all{border-color:var(--sp-line);color:var(--sp-muted)}
:root[data-theme=dark] body.spinal-app :is(.ntf-crumbs,.ntf-crumbs a){color:var(--sp-muted)}
:root[data-theme=dark] body.spinal-app .ntf-crumbs [aria-current=page]{color:var(--sp-ink)}
:root[data-theme=dark] body.spinal-app .ntf-footer{background:var(--sp-bg);color:var(--sp-muted);border-top-color:var(--sp-line)}
@media(max-width:900px){
  :root[data-theme=dark] body.spinal-app .ntf-nav{background:var(--sp-bg);border-bottom-color:var(--sp-line);box-shadow:none}
  :root[data-theme=dark] body.spinal-app :is(.ntf-nav>a,.ntf-menu>summary){border-bottom-color:var(--sp-line)}
  :root[data-theme=dark] body.spinal-app .ntf-menu-panel{background:transparent;border:0}
  :root[data-theme=dark] body.spinal-app .ntf-menu-panel a{background:var(--sp-surface)}
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme=light]) body.spinal-app{
    --sp-bg:#15171a;--sp-surface:#1c1f23;--sp-surface-2:#24282d;
    --sp-ink:#ecebe7;--sp-ink-2:#d2d4d7;--sp-muted:#aeb3ba;--sp-line:#30343a;--sp-line-strong:#6d727a;
    --sp-accent:#e8aaa6;--sp-on-accent:#15171a;--sp-accent-soft:#35262a;--sp-focus:#f2c46d;
    --sp-key:#7fd3cb;--sp-key-bg:#182725;
    --sp-danger:#ff9d8f;--sp-danger-bg:#3b1e1b;
    --sp-warn:#e7b75a;--sp-warn-bg:#33291a;
    --sp-ok:#9bd59b;--sp-ok-bg:#1b2e1d;
    --sp-pearl:#b9b2ff;--sp-pearl-bg:#252340;
    --sp-policy:#c9c1b6;--sp-policy-bg:#2a2622;
    --sp-t1:#9bd59b;--sp-t1-bg:#1b2e1d;--sp-t2:#9cc6f6;--sp-t2-bg:#172a3e;--sp-t3:#b9b2ff;--sp-t3-bg:#252340;
  }
:root:not([data-theme=light]) body.spinal-app .ntf-header{background:var(--sp-bg);color:var(--sp-ink);border-bottom-color:var(--sp-line)}
:root:not([data-theme=light]) body.spinal-app .ntf-logo img{filter:brightness(0) invert(1)}
:root:not([data-theme=light]) body.spinal-app .ntf-header :is(.ntf-contact,.ntf-mobile-toggle){color:var(--sp-ink)}
:root:not([data-theme=light]) body.spinal-app .ntf-contact:hover{background:var(--sp-surface-2)}
:root:not([data-theme=light]) body.spinal-app .ntf-nav>a[aria-current=page],:root:not([data-theme=light]) body.spinal-app .ntf-menu:has(a[aria-current=page])>summary{color:var(--sp-accent)}
:root:not([data-theme=light]) body.spinal-app .ntf-header :is(a,button,summary):focus-visible{outline-color:var(--sp-focus)}
:root:not([data-theme=light]) body.spinal-app .ntf-menu-panel{background:var(--sp-surface);border-color:var(--sp-line);box-shadow:none;color:var(--sp-ink)}
:root:not([data-theme=light]) body.spinal-app .ntf-menu-panel a:hover,:root:not([data-theme=light]) body.spinal-app .ntf-menu-panel a[aria-current=page]{background:var(--sp-surface-2)}
:root:not([data-theme=light]) body.spinal-app .ntf-menu-panel .ntf-menu-all{border-color:var(--sp-line);color:var(--sp-muted)}
:root:not([data-theme=light]) body.spinal-app :is(.ntf-crumbs,.ntf-crumbs a){color:var(--sp-muted)}
:root:not([data-theme=light]) body.spinal-app .ntf-crumbs [aria-current=page]{color:var(--sp-ink)}
:root:not([data-theme=light]) body.spinal-app .ntf-footer{background:var(--sp-bg);color:var(--sp-muted);border-top-color:var(--sp-line)}
@media(max-width:900px){
  :root:not([data-theme=light]) body.spinal-app .ntf-nav{background:var(--sp-bg);border-bottom-color:var(--sp-line);box-shadow:none}
  :root:not([data-theme=light]) body.spinal-app :is(.ntf-nav>a,.ntf-menu>summary){border-bottom-color:var(--sp-line)}
  :root:not([data-theme=light]) body.spinal-app .ntf-menu-panel{background:transparent;border:0}
  :root:not([data-theme=light]) body.spinal-app .ntf-menu-panel a{background:var(--sp-surface)}
}
  html:root:not([data-theme=light]){color-scheme:dark}
}
html:root[data-theme=dark]{color-scheme:dark}
html:root[data-theme=light]{color-scheme:light}

/* One sticky bar (the site header scrolls away). --ra-bar is its height; deep-link targets land just below it.
   No smooth scrolling: programmatic jumps across these long chapters are instant. */
:root:has(body.spinal-app){--ra-bar:56px}
html:has(body.spinal-app){scroll-padding-top:calc(var(--ra-bar,56px) + 8px)}
body.spinal-app .ntf-header{position:relative;z-index:60} /* scrolls away; its phone menu stays above the bar and the page */
body.spinal-app .ntf-footer .ntf-copyright{font-size:12px}

/* ------------------------------------------------------------------ base type */
body.spinal-app :is(a,button,summary,select,input,textarea,[tabindex]):focus-visible{outline:2px solid var(--sp-focus);outline-offset:3px;border-radius:0}
.spinal-app :is(.sp-hero,main,.sp-foot) a{color:var(--sp-accent);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px}
.spinal-app :is(.sp-hero,main,.sp-foot) a:hover{text-decoration-thickness:2px}
.spinal-app main{display:block;padding-bottom:24px}
.spinal-app main :is(h2,h3,h4){color:var(--sp-ink);margin:0}
.spinal-app main h2{font:400 clamp(32px,3.6vw,44px)/1.15 var(--sp-serif);letter-spacing:-.035em;margin:0 0 16px;max-width:30ch;text-wrap:balance}
.spinal-app main h3{font:400 26px/1.25 var(--sp-serif);letter-spacing:-.02em;margin:56px 0 14px;text-wrap:balance}
.spinal-app main h3::before{content:'';display:block;width:28px;height:3px;background:var(--sp-accent);margin:0 0 14px}
.spinal-app main h4{font:600 13px/1.4 var(--sp-sans);text-transform:uppercase;letter-spacing:.08em;color:var(--sp-ink);margin:24px 0 8px}
.spinal-app main :is(p,ul,ol,dl){margin:0 0 16px}
.spinal-app main :is(p,li,dd){max-width:70ch}
@media (min-width:761px){body.spinal-app{font-size:17px}}
.spinal-app main :is(ul,ol):not([class]){padding-left:1.3em}
.spinal-app main li:not([class])+li{margin-top:7px}
.spinal-app main :is(ul,ol):not([class]) li::marker,.spinal-app main :is(.tq-list,.cx-list) li::marker{color:var(--sp-muted)}
.spinal-app main strong{font-weight:600}
.spinal-app :is(main,.sp-hero) em{font-family:inherit;font-style:italic}
.spinal-app .sp-hero h1 em{font-family:var(--sp-serif)}
.spinal-app :is(code,kbd,.sp-num,.sp-dose){font-family:var(--sp-mono);font-size:.92em;font-variant-numeric:tabular-nums}
.spinal-app .sp-prose{max-width:70ch}
.spinal-app .sp-lead{font-size:19px;line-height:1.6;color:var(--sp-ink-2);max-width:62ch;margin:0 0 20px}
.spinal-app :is(.sp-kicker,.sp-eyebrow){font:400 12px/1.6 var(--sp-mono);text-transform:uppercase;letter-spacing:.1em;color:var(--sp-muted);margin:0 0 10px}
.spinal-app ::selection{background:var(--sp-accent-soft);color:var(--sp-ink)}

.sp-sr{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}
.spinal-app .sp-skip{position:fixed;left:16px;top:-120px;z-index:100;padding:12px 16px;background:var(--sp-bg);color:var(--sp-ink);border:1px solid var(--sp-ink);font:500 14px/1.4 var(--sp-sans);text-decoration:none}
.spinal-app .sp-skip:focus{top:12px}

/* ------------------------------------------------------------------ hero */
.spinal-app .sp-hero{padding-top:40px;padding-bottom:28px;/* hairline aligned to the content column, not the padded box */background:linear-gradient(var(--sp-line),var(--sp-line)) center bottom/calc(100% - 2*var(--site-gutter)) 1px no-repeat}
.spinal-app .sp-hero-top{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:14px}
.spinal-app .sp-hero-top .sp-eyebrow{margin:0}
.spinal-app .sp-hero h1{font:400 clamp(40px,5vw,64px)/1.1 var(--sp-serif);letter-spacing:-.03em;color:var(--sp-ink);margin:0 0 18px;max-width:20ch;text-wrap:balance}
.spinal-app .sp-hero h1 em{color:var(--sp-accent);font-style:italic}
.spinal-app .sp-hero .sp-lead{margin:0 0 14px}
.spinal-app .sp-credit{font-size:14px;line-height:1.6;color:var(--sp-muted);margin:0}
.spinal-app .sp-tools{display:flex;gap:8px;flex-shrink:0}
.spinal-app .sp-tool{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 14px;border:1px solid var(--sp-line-strong);border-radius:0;background:transparent;color:var(--sp-ink);font:14px/1 var(--sp-sans);cursor:pointer;transition:border-color .15s,background-color .15s}
.spinal-app .sp-tool:hover{border-color:var(--sp-accent);background:var(--sp-accent-soft)}
.spinal-app .sp-tool svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
.spinal-app .sp-tool svg .fill{fill:currentColor;stroke:none}
.spinal-app .sp-tool[data-theme-state=light] svg .fill{fill:none}
.spinal-app .sp-tool[data-theme-state=dark] svg circle{fill:currentColor}

/* ------------------------------------------------------------------ sections */
.spinal-app .sp-section{padding-block:72px;border-top:1px solid var(--sp-line-strong)}
.spinal-app .sp-section>.sp-kicker{color:var(--sp-accent)}
.spinal-app .sp-mount{min-height:40px}
.spinal-app .sp-mount-error{font-size:15px;color:var(--sp-danger);background:var(--sp-danger-bg);border-left:3px solid var(--sp-danger);padding:12px 16px;max-width:68ch}
.spinal-app .sp-placeholder{color:var(--sp-muted);font-style:italic}
.spinal-app .sp-jump{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:8px;margin:0 0 28px;padding:0;list-style:none;font:14px/1.35 var(--sp-sans);max-width:none}
.spinal-app main .sp-jump li{display:block;margin:0;max-width:none}
.spinal-app main .sp-jump li+li{margin-top:0}
.spinal-app .sp-jump li+li::before{content:none}
.spinal-app main .sp-jump a{display:flex;align-items:center;gap:2px;min-height:44px;height:100%;box-sizing:border-box;padding:8px 12px;border:1px solid var(--sp-line);background:var(--sp-surface);color:var(--sp-ink);text-decoration:none;transition:border-color .15s,background-color .15s}
.spinal-app main .sp-jump a:is(:hover,:focus-visible){border-color:var(--sp-accent);text-decoration:none;background:var(--sp-accent-soft)}
@media (max-width:480px){.spinal-app .sp-jump{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:6px}.spinal-app main .sp-jump a{padding:8px 10px;font-size:14px}}
.spinal-app .sp-split{display:grid;gap:32px}
@media (min-width:1100px){
  .spinal-app .sp-split{grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:40px;align-items:start}
  .spinal-app .sp-split>.sp-split-fig{position:sticky;top:calc(var(--ra-bar-now,var(--ra-bar,56px)) + 16px)}
}
.spinal-app .sp-noscript{padding-block:16px;color:var(--sp-muted)}

/* ------------------------------------------------------------------ chips */
.spinal-app .sp-chip{display:inline-block;vertical-align:.1em;font:400 12px/1.4 var(--sp-mono);letter-spacing:.02em;padding:1px 6px;border:1px solid var(--sp-line-strong);color:var(--sp-muted);font-variant-numeric:tabular-nums;white-space:nowrap}

/* ------------------------------------------------------------------ buttons (generic) */
.spinal-app .sp-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:8px 16px;border:1px solid var(--sp-line-strong);border-radius:0;background:transparent;color:var(--sp-ink);font:14px/1.3 var(--sp-sans);cursor:pointer;transition:border-color .15s,background-color .15s}
.spinal-app .sp-btn:hover{border-color:var(--sp-accent);background:var(--sp-accent-soft)}
.spinal-app .sp-btn--primary{background:var(--sp-accent);border-color:var(--sp-accent);color:var(--sp-on-accent)}
.spinal-app .sp-btn--primary:hover{background:var(--sp-accent);color:var(--sp-on-accent);text-decoration:underline;text-underline-offset:3px}
.spinal-app .sp-btn:disabled{opacity:.5;cursor:not-allowed}

/* ------------------------------------------------------------------ callouts */
.spinal-app .sp-callout{--c:var(--sp-key);--cb:var(--sp-key-bg);margin:20px 0;padding:14px 18px;background:var(--cb);border-left:3px solid var(--c);max-width:72ch;color:var(--sp-ink)}
.spinal-app .sp-callout--key{--c:var(--sp-key);--cb:var(--sp-key-bg)}
.spinal-app .sp-callout--warn{--c:var(--sp-danger);--cb:var(--sp-danger-bg)}
.spinal-app .sp-callout--pearl{--c:var(--sp-pearl);--cb:var(--sp-pearl-bg)}
.spinal-app .sp-callout--policy{--c:var(--sp-policy);--cb:var(--sp-policy-bg);border:1px dashed var(--c);border-left:3px solid var(--c)}
.spinal-app .sp-callout-label{display:flex;align-items:center;gap:7px;margin:0 0 4px;font:600 12px/1.4 var(--sp-sans);text-transform:uppercase;letter-spacing:.08em;color:var(--c)}
.spinal-app .sp-callout-label svg{width:16px;height:16px;flex-shrink:0}
.spinal-app .sp-callout-title{font:600 16px/1.45 var(--sp-sans);margin:0 0 4px}
.spinal-app .sp-callout-body{font-size:15px;line-height:1.65}
.spinal-app .sp-callout-body>:last-child{margin-bottom:0}
.spinal-app .sp-callout-body :is(p,ul,ol){margin:0 0 8px}
.spinal-app .sp-callout-body :is(ul,ol){padding-left:1.2em}

/* ------------------------------------------------------------------ tables */
.spinal-app .sp-table-wrap{margin:24px 0;max-width:100%}
.spinal-app .sp-table{width:100%;border-collapse:collapse;font-size:15px;line-height:1.55;color:var(--sp-ink)}
.spinal-app .sp-table caption{caption-side:top;text-align:left;font:400 18px/1.35 var(--sp-serif);letter-spacing:-.01em;padding:0 0 10px;color:var(--sp-ink)}
.spinal-app .sp-table thead th{font:600 12px/1.4 var(--sp-sans);text-transform:uppercase;letter-spacing:.06em;color:var(--sp-ink-2);background:var(--sp-surface-2);text-align:left;padding:12px 14px;vertical-align:bottom;border-bottom:1px solid var(--sp-line-strong)}
.spinal-app .sp-table tbody tr:nth-child(even){background:var(--sp-surface)}
.spinal-app .sp-table :is(td,tbody th){padding:12px 14px;border-bottom:1px solid var(--sp-line);text-align:left;vertical-align:top}
.spinal-app .sp-table tbody th{font-weight:600}
.spinal-app .sp-table :is(td,th)>:last-child{margin-bottom:0}
.spinal-app .sp-table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.spinal-app .sp-table-wrap--scroll .sp-table{min-width:560px}
.spinal-app .sp-scroll-hint{display:none;margin:6px 0 0;text-align:right;font:12px/1.4 var(--sp-mono);color:var(--sp-muted)}
@media (max-width:640px){
  .spinal-app .sp-scroll-hint{display:block}
  .spinal-app .sp-table--stack,.spinal-app .sp-table--stack :is(tbody,tr,td,tbody th){display:block;width:100%;box-sizing:border-box}
  .spinal-app .sp-table--stack caption{display:block}
  .spinal-app .sp-table--stack thead{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
  .spinal-app .sp-table--stack tr{border:1px solid var(--sp-line);padding:12px;margin:0 0 10px;background:var(--sp-surface)}
  .spinal-app .sp-table--stack :is(td,tbody th){border:0;padding:4px 0}
  .spinal-app .sp-table--stack :is(td,tbody th)[data-label]::before{content:attr(data-label);display:block;font:400 12px/1.5 var(--sp-mono);text-transform:uppercase;letter-spacing:.06em;color:var(--sp-muted);margin-bottom:1px}
  .spinal-app .sp-table--stack tbody th{font:600 16px/1.4 var(--sp-sans);padding-bottom:6px}
}

/* ------------------------------------------------------------------ steps */
.spinal-app .sp-steps{list-style:none;margin:20px 0;padding:0;max-width:72ch}
.spinal-app .sp-step{display:grid;grid-template-columns:32px minmax(0,1fr);gap:16px;padding:16px 0;border-top:1px solid var(--sp-line)}
.spinal-app .sp-step:last-child{border-bottom:1px solid var(--sp-line)}
.spinal-app .sp-step-n{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:var(--sp-ink);color:var(--sp-bg);font:500 14px/1 var(--sp-mono);font-variant-numeric:tabular-nums}
.spinal-app .sp-step-title{font:600 16px/1.45 var(--sp-sans);margin:4px 0 4px;color:var(--sp-ink)}
.spinal-app .sp-step-title .sp-chip{margin-left:4px}
.spinal-app .sp-step-body{font-size:15px;line-height:1.65;color:var(--sp-ink)}
.spinal-app .sp-step-body>:last-child{margin-bottom:0}
.spinal-app .sp-step-body :is(p,ul){margin:0 0 8px}
.spinal-app .sp-step-body :is(p,li){color:var(--sp-ink-2)}

/* ------------------------------------------------------------------ tabs */
.spinal-app .sp-tabs{display:grid;grid-template-columns:repeat(var(--sp-tab-count,2),minmax(0,1fr));border:1px solid var(--sp-line-strong);margin:20px 0 0}
.spinal-app .sp-tab{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-height:52px;padding:8px 10px;margin:0;border:0;border-left:1px solid var(--sp-line-strong);border-radius:0;background:transparent;color:var(--sp-ink);font:500 15px/1.3 var(--sp-sans);text-align:center;cursor:pointer;transition:background-color .15s,color .15s}
.spinal-app .sp-tab:first-child{border-left:0}
.spinal-app .sp-tab:hover{background:var(--sp-accent-soft)}
.spinal-app .sp-tab-sub{font:400 12px/1.3 var(--sp-sans);color:var(--sp-muted)}
.spinal-app .sp-tab[aria-selected=true]{background:var(--sp-accent);color:var(--sp-on-accent)}
.spinal-app .sp-tab[aria-selected=true] .sp-tab-sub{color:var(--sp-on-accent)}
.spinal-app .sp-tab:focus-visible{outline-offset:-4px;outline-color:var(--sp-focus)}
.spinal-app .sp-tab[aria-selected=true]:focus-visible{outline-color:var(--sp-on-accent)}
.spinal-app .sp-tabpanel{padding-top:20px}
.spinal-app .sp-tabpanel:focus-visible{outline-offset:2px}
@media (max-width:640px){
  .spinal-app .sp-tab{font-size:14px;padding:8px 4px}
  .spinal-app .sp-tab-sub{font-size:12px}
}

/* ------------------------------------------------------------------ segmented */
.spinal-app .sp-seg{display:flex;flex-wrap:wrap;gap:8px}
.spinal-app .sp-seg-btn{min-height:44px;padding:8px 16px;border:1px solid var(--sp-line-strong);border-radius:0;background:transparent;color:var(--sp-ink);font:14px/1.3 var(--sp-sans);cursor:pointer;transition:border-color .15s,background-color .15s}
.spinal-app .sp-seg-btn:hover{border-color:var(--sp-accent)}
.spinal-app .sp-seg-btn[aria-pressed=true]{background:var(--sp-accent-soft);border-color:var(--sp-accent);color:var(--sp-ink);font-weight:500}

/* ------------------------------------------------------------------ figure */
.spinal-app .sp-fig{margin:24px 0;max-width:100%}
.spinal-app .sp-fig-title{font:400 20px/1.3 var(--sp-serif);letter-spacing:-.015em;margin:0 0 10px}
.spinal-app .sp-fig-stage{position:relative;width:100%;overflow:hidden;border:1px solid var(--sp-line);background:var(--an-plate);color:var(--an-ink)}
.spinal-app .sp-fig-stage[data-plate=us]{background:var(--us-bg);color:var(--us-label)}
.spinal-app .sp-fig-stage[data-plate=none]{background:var(--sp-surface);color:var(--sp-ink)}
.spinal-app .sp-fig-stage>:is(canvas,svg,img){display:block;width:100%;height:100%}
.spinal-app .sp-fig-controls{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:10px}
.spinal-app .sp-fig-controls:empty{display:none}
.spinal-app .sp-fig-controls input[type=range]{min-height:44px;accent-color:var(--sp-accent)}
.spinal-app .sp-fig figcaption{margin-top:10px;font-size:14px;line-height:1.6;color:var(--sp-muted);max-width:80ch}
.spinal-app .sp-fig-num{font:500 12px/1.4 var(--sp-mono);color:var(--sp-ink);letter-spacing:.02em;margin-right:4px}

/* ------------------------------------------------------------------ details */
.spinal-app .sp-details{border-top:1px solid var(--sp-line);max-width:72ch}
.spinal-app .sp-details+.sp-details{border-top:1px solid var(--sp-line)}
.spinal-app .sp-details:last-of-type{border-bottom:1px solid var(--sp-line)}
.spinal-app .sp-details>summary{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:52px;padding:12px 0;cursor:pointer;list-style:none;font:500 16px/1.45 var(--sp-sans);color:var(--sp-ink)}
.spinal-app .sp-details>summary::-webkit-details-marker{display:none}
.spinal-app .sp-details>summary::after{content:'+';flex-shrink:0;width:20px;text-align:center;font:400 20px/1 var(--sp-mono);color:var(--sp-accent)}
.spinal-app .sp-details[open]>summary::after{content:'−'}
.spinal-app .sp-details>summary:hover{color:var(--sp-accent)}
.spinal-app .sp-details-body{padding:0 0 18px;font-size:15px;line-height:1.7}
.spinal-app .sp-details-body>:last-child{margin-bottom:0}

/* ------------------------------------------------------------------ citations + references */
/* Citation numbers: never under 12px; the link gets inline padding so the tap target is at least 24px tall. */
.spinal-app .sp-cite{font:500 max(12px,.72em)/1 var(--sp-mono);vertical-align:super;line-height:0;margin-left:1px;white-space:nowrap}
.spinal-app main .sp-cite a{color:var(--sp-accent);text-decoration:none;padding:6px 2px}
.spinal-app main .sp-cite a:is(:hover,:focus-visible){text-decoration:underline;text-underline-offset:2px}
.spinal-app .sp-refs{list-style:none;margin:8px 0 0;padding:0;max-width:90ch;font-size:14px;line-height:1.65}
.spinal-app .sp-refs li{display:grid;grid-template-columns:2.6em minmax(0,1fr);gap:4px;padding:8px 0;border-bottom:1px solid var(--sp-line);max-width:none}
.spinal-app .sp-refs li:target{background:var(--sp-accent-soft)}
.spinal-app .sp-ref-num{font:500 13px/1.65 var(--sp-mono);color:var(--sp-muted);font-variant-numeric:tabular-nums}
.spinal-app .sp-ref-body{overflow-wrap:anywhere}
.spinal-app .sp-ref-body b{font-weight:600}
.spinal-app main .sp-ref-back{text-decoration:none;display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;vertical-align:middle}
.spinal-app main .sp-ref-link{padding-block:4px}
.spinal-app .sp-refs-empty{color:var(--sp-muted);display:block!important}

/* Inline text links: vertical padding (no layout change for inline boxes) makes each tap target at least 24px tall. */
.spinal-app main :where(a:not([class])),.spinal-app :where(.sp-foot,.sp-credit) a{padding-block:4px}

/* ------------------------------------------------------------------ foot */
.spinal-app .sp-foot{border-top:1px solid var(--sp-line);padding:32px 0 36px;background:var(--sp-bg);color:var(--sp-muted);font-size:14px;line-height:1.7}
.spinal-app .sp-foot p{margin:0 0 10px;max-width:80ch}
.spinal-app .sp-foot p:last-child{margin:0}
.spinal-app .sp-disclaimer{color:var(--sp-ink)}
.spinal-app .sp-disclaimer strong{font-weight:600}
.spinal-app .ntf-footer{margin:0}

/* ------------------------------------------------------------------ responsive */
@media (max-width:760px){
  .spinal-app .sp-hero{padding-top:28px;padding-bottom:24px}
  .spinal-app .sp-hero h1{font-size:clamp(36px,10vw,40px);line-height:1.1}
  .spinal-app .sp-tool{width:44px;padding:0;justify-content:center}
  .spinal-app .sp-tool span{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap}
  .spinal-app .sp-section{padding-block:48px}
  .spinal-app main h3{font-size:22px;margin-top:56px}
  .spinal-app .sp-lead{font-size:16.5px}
}

@media (prefers-reduced-motion:reduce){
  .spinal-app *,.spinal-app *::before,.spinal-app *::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

@media print{
  .spinal-app :is(.sp-tools,.sp-skip,.sp-fig-controls){display:none!important}
  .spinal-app .sp-section{break-inside:auto;padding-block:24px}
  body.spinal-app{background:#fff;color:#000}
}

/* Programmatic focus targets (deep links, tree headings) need no ring; interactive controls keep theirs. */
body.spinal-app [tabindex="-1"]:is(:focus,:focus-visible){outline:none}

/* ------------------------------------------------------------------ levels, key points */
/* Tier filtering: levels are cumulative. body[data-tier-max] = 1 (MO), 2 (Resident), 3 (Consultant, default).
   (The same rule ships in ../../shared/regional/css/levels.css; kept here so the page works if that file is late.) */
body.spinal-app[data-tier-max="1"] [data-tier="2"],
body.spinal-app[data-tier-max="1"] [data-tier="3"],
body.spinal-app[data-tier-max="2"] [data-tier="3"]{display:none!important}

/* Tier badges, drawn by CSS: "Resident" and "Consultant" only (MO content always shows, so it needs no badge), and only
   on the first block of a run: not on a block nested in, or straight after, a block of the same tier, nor on table
   cells, key points or the ward card list. A badged block reserves 30px above itself and the badge sits in that space. */
.spinal-app main [data-tier]{position:relative}
.spinal-app main [data-tier="2"]{--tc:var(--sp-t2);--tb:var(--sp-t2-bg)}
.spinal-app main [data-tier="3"]{--tc:var(--sp-t3);--tb:var(--sp-t3-bg)}
.spinal-app main :is([data-tier="2"],[data-tier="3"])::after{position:absolute;top:-25px;left:0;right:auto;z-index:1;padding:2px 7px;background:var(--tb);color:var(--tc);font:400 12px/1.4 var(--sp-mono);letter-spacing:.06em;text-transform:uppercase;pointer-events:none;white-space:nowrap}
.spinal-app main [data-tier="2"]::after{content:'Resident'}
.spinal-app main [data-tier="3"]::after{content:'Consultant'}
.spinal-app main :is([data-tier="2"] [data-tier="2"],[data-tier="3"] [data-tier="3"],[data-tier="2"]+[data-tier="2"],[data-tier="3"]+[data-tier="3"],.sp-keypoints,.sp-sixty)::after{display:none}
.spinal-app main :is(td,th,tr,tbody,thead)[data-tier]::after{display:none}
body.spinal-app main :is([data-tier="2"],[data-tier="3"]):not(td,th,tr,tbody,thead,.sp-keypoints,.sp-sixty,[data-tier="2"] [data-tier="2"],[data-tier="3"] [data-tier="3"],[data-tier="2"]+[data-tier="2"],[data-tier="3"]+[data-tier="3"]){margin-top:max(32px,var(--sp-tier-gap,32px))}

/* Key points box */
.spinal-app .sp-keypoints{margin:0 0 28px;padding:14px 18px 6px;max-width:72ch;background:var(--sp-key-bg);border:1px solid var(--sp-line);border-left:4px solid var(--sp-key)}
.spinal-app .sp-keypoints-title{margin:0 0 8px;font:400 12px/1.6 var(--sp-mono);text-transform:uppercase;letter-spacing:.1em;color:var(--sp-key)}
.spinal-app main .sp-keypoints ul{list-style:none;margin:0 0 8px;padding:0}
.spinal-app main .sp-keypoints li{position:relative;margin:0 0 6px;padding-left:16px;font-size:15px;line-height:1.55;max-width:none}
.spinal-app main .sp-keypoints li::before{content:'';position:absolute;left:0;top:.58em;width:6px;height:6px;background:var(--sp-key)}

/* 60 seconds block */
.spinal-app .sp-sixty-list{list-style:none;counter-reset:sixty;margin:0 0 24px;padding:0;max-width:72ch}
.spinal-app main .sp-sixty-list li{counter-increment:sixty;position:relative;padding:11px 0 11px 46px;margin:0;border-top:1px solid var(--sp-line);font-size:15px;line-height:1.6;max-width:none}
.spinal-app main .sp-sixty-list li:last-child{border-bottom:1px solid var(--sp-line)}
.spinal-app .sp-sixty-list li::before{content:counter(sixty);display:flex;align-items:center;justify-content:center;width:28px;height:28px;background:var(--sp-ink);color:var(--sp-bg);font:500 13px/1 var(--sp-mono);position:absolute;left:0;top:10px}
.spinal-app .sp-stop{max-width:72ch;padding:14px 18px 6px;background:var(--sp-danger-bg);border-left:4px solid var(--sp-danger)}
.spinal-app .sp-stop-title{margin:0 0 8px;font:600 12px/1.4 var(--sp-sans);text-transform:uppercase;letter-spacing:.08em;color:var(--sp-danger)}
.spinal-app main .sp-stop ul{list-style:none;margin:0 0 8px;padding:0}
.spinal-app main .sp-stop li{position:relative;margin:0 0 8px;padding-left:16px;font-size:15px;line-height:1.55;max-width:none}
.spinal-app main .sp-stop li::before{content:'';position:absolute;left:0;top:.58em;width:6px;height:6px;background:var(--sp-danger)}

@media (max-width:760px){
  .spinal-app .sp-keypoints{padding:12px 14px 4px}
}


/* "Pearls only" (Consultant level): each section shows only its digest of consultant pearls (built by app.js). */
.spinal-app .sp-adv-digest{display:none}
body.spinal-app[data-pearls-only="true"] main .sp-section:not(#references):not(#card) > :not(.sp-kicker,h2,.sp-adv-digest,.sp-ch-tools){display:none!important}
body.spinal-app[data-pearls-only="true"] .sp-adv-digest{display:block}
.spinal-app .sp-adv-digest{max-width:860px}
.spinal-app .sp-adv-item{margin:0 0 22px}
.spinal-app .sp-adv-item > :not(.sp-adv-from){margin-top:6px}
.spinal-app .sp-adv-from{margin:0;font:400 12px/1.6 var(--sp-mono);text-transform:uppercase;letter-spacing:.08em;color:var(--sp-pearl)}
.spinal-app .sp-adv-empty{margin:0;color:var(--sp-muted);font-style:italic}
.spinal-app .sp-adv-digest .sp-callout-label{display:none}
/* Consultant pearls (tier-3 key boxes) take the pearl colour, matching their badge. */
.spinal-app .sp-callout--key[data-tier="3"],.spinal-app .sp-adv-digest .sp-callout--key{--c:var(--sp-pearl);--cb:var(--sp-pearl-bg)}

/* ================================================================== v3: hub + chapters */
.spinal-app main{position:relative}
.spinal-app .sp-chapter{display:block}
/* While mounting, hidden chapters sit off-screen at full width so widgets can measure themselves. */
body.spinal-app.sp-booting .sp-chapter:not(.is-current){position:absolute;left:-200vw;top:0;width:100%;visibility:hidden;pointer-events:none}
body.spinal-app.sp-chapters-on .sp-chapter:not(.is-current){display:none}
.spinal-app .sp-chapter>.sp-section{padding-block:28px 40px;border-top:0}
.spinal-app .sp-chapter>.sp-section+.sp-section{border-top:1px solid var(--sp-line-strong);padding-top:48px}
.spinal-app .sp-ch-tools{max-width:860px}
.spinal-app .sp-ch-tools .ra-hidden-hint{margin:12px 0 0}
.spinal-app .sp-ch-tools--pearls .sp-pearls{margin:0 0 20px}
.spinal-app .sp-pearls{display:flex;flex-wrap:wrap;align-items:center;gap:4px 12px;margin:12px 0 0;max-width:none;color:var(--sp-muted);font-size:15px;line-height:1.4}
.spinal-app .sp-pearls[hidden]{display:none}
.spinal-app .sp-pearls-btn{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 14px;border:1px solid var(--sp-line-strong);border-radius:0;background:var(--sp-surface);color:var(--sp-ink);font:500 15px/1.2 var(--sp-sans);cursor:pointer}
.spinal-app .sp-pearls-btn::before{content:'';width:14px;height:14px;border:1.5px solid currentColor;box-sizing:border-box}
.spinal-app .sp-pearls-btn:hover{border-color:var(--sp-accent);background:var(--sp-accent-soft)}
.spinal-app .sp-pearls-btn[aria-pressed=true]{background:var(--sp-accent);border-color:var(--sp-accent);color:var(--sp-on-accent)}
.spinal-app .sp-pearls-btn[aria-pressed=true]::before{background:currentColor;box-shadow:inset 0 0 0 2px var(--sp-accent)}
.spinal-app .sp-ch-kicker{font:400 12px/1.6 var(--sp-mono);text-transform:uppercase;letter-spacing:.1em;color:var(--sp-accent);margin:28px 0 0}

/* The one sticky app bar (plan §4): home, chapter menu, search, copy link, MO · Res · Con level control.
   It matches the regional block pages' bar (../../shared/regional/css/regional.css .tb-bar). At most 56px tall. */
.spinal-app .sp-bar{position:sticky;top:0;z-index:50;background:var(--sp-bg);border-bottom:1px solid var(--sp-line)}
.spinal-app .sp-bar-inner{position:relative;display:flex;align-items:center;gap:8px;min-height:55px;padding-block:4px}
.spinal-app .sp-bar-home{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 12px 0 8px;border:1px solid var(--sp-line-strong);color:var(--sp-ink);font:500 15px/1 var(--sp-sans);text-decoration:none;flex-shrink:0;background:var(--sp-surface)}
.spinal-app .sp-bar-home svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.spinal-app .sp-bar-home--back svg{stroke-width:1.9}
.spinal-app .sp-bar-home:hover{border-color:var(--sp-accent);background:var(--sp-accent-soft)}
.spinal-app .sp-chnav{flex:1;min-width:0;display:flex;align-items:center;gap:8px}
.spinal-app .sp-chlist{display:none;list-style:none;margin:0;padding:0;gap:2px 14px;flex:1;flex-wrap:nowrap;align-items:center;min-width:0;overflow:hidden}
.spinal-app .sp-chlist li{margin:0}
.spinal-app .sp-chlist a{display:flex;align-items:center;min-height:44px;font:14px/1.2 var(--sp-sans);color:var(--sp-muted);text-decoration:none;white-space:nowrap;border-bottom:2px solid transparent}
.spinal-app .sp-chlist a:hover{color:var(--sp-ink)}
.spinal-app .sp-chlist a[aria-current=page]{color:var(--sp-ink);border-bottom-color:var(--sp-accent);font-weight:500}
/* Chapter disclosure menu (narrow screens, or when the inline list doesn't fit) */
.spinal-app .sp-chmenu{position:relative;flex:1;min-width:0}
.spinal-app .sp-chmenu-btn{display:flex;align-items:center;gap:8px;width:100%;min-height:44px;padding:0 12px;border:1px solid var(--sp-line-strong);border-radius:0;background:var(--sp-surface);color:var(--sp-ink);font:16px/1.2 var(--sp-sans);cursor:pointer;text-align:left}
.spinal-app .sp-chmenu-btn:hover{border-color:var(--sp-accent);background:var(--sp-accent-soft)}
.spinal-app .sp-chmenu-k{flex-shrink:0;font:400 12px/1 var(--sp-mono);text-transform:uppercase;letter-spacing:.06em;color:var(--sp-muted)}
.spinal-app .sp-chmenu-cur{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.spinal-app .sp-chmenu-caret{flex-shrink:0;width:8px;height:8px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;transform:translateY(-2px) rotate(45deg)}
.spinal-app .sp-chmenu-btn[aria-expanded=true] .sp-chmenu-caret{transform:translateY(2px) rotate(-135deg)}
.spinal-app .sp-chmenu-panel{position:absolute;left:0;top:calc(100% + 4px);z-index:60;width:max(100%,min(360px,calc(100vw - 32px)));max-width:calc(100vw - 16px);max-height:min(70vh,560px);overflow-y:auto;overscroll-behavior:contain;background:var(--sp-bg);border:1px solid var(--sp-line-strong);border-top:2px solid var(--sp-accent);box-shadow:0 12px 24px rgba(0,0,0,.14)}
.spinal-app .sp-chmenu-panel[hidden]{display:none}
.spinal-app .sp-chmenu-list,.spinal-app .sp-chmenu-extra{list-style:none;margin:0;padding:4px 0}
.spinal-app .sp-chmenu-extra{border-top:1px solid var(--sp-line)}
.spinal-app :is(.sp-chmenu-list,.sp-chmenu-extra) li{margin:0}
.spinal-app .sp-chmenu-list a{display:flex;align-items:center;min-height:44px;padding:8px 14px;color:var(--sp-ink);font:15px/1.35 var(--sp-sans);text-decoration:none}
.spinal-app .sp-chmenu-list a:hover{background:var(--sp-accent-soft)}
.spinal-app .sp-chmenu-list a[aria-current=page]{background:var(--sp-surface-2);box-shadow:inset 3px 0 0 var(--sp-accent);font-weight:500}
.spinal-app .sp-chmenu-act{display:flex;align-items:center;gap:10px;width:100%;min-height:44px;padding:8px 14px;border:0;border-radius:0;background:none;color:var(--sp-ink);font:15px/1.35 var(--sp-sans);text-align:left;text-decoration:none;cursor:pointer}
.spinal-app .sp-chmenu-act:hover{background:var(--sp-accent-soft)}
.spinal-app .sp-chmenu-act svg{width:18px;height:18px;flex-shrink:0;fill:none;stroke:var(--sp-accent);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.spinal-app :is(.sp-chmenu-list a,.sp-chmenu-act,.sp-chmenu-btn,.sp-chmenu-panel){box-sizing:border-box}
.spinal-app :is(.sp-chmenu-list a,.sp-chmenu-act):focus-visible{outline-offset:-3px}
.spinal-app .sp-chmenu-share-li{display:none}
@media (min-width:1240px){
  .spinal-app .sp-bar:not(.sp-bar--menu) .sp-chlist{display:flex}
  .spinal-app .sp-bar:not(.sp-bar--menu) .sp-chmenu{display:none}
}
.spinal-app .sp-bar-btn{flex-shrink:0;padding:0 14px}
.spinal-app .sp-bar-level{flex-shrink:0;display:flex}
@media (max-width:1239px){.spinal-app .sp-bar-btn{width:44px;padding:0;justify-content:center}.spinal-app .sp-bar-btn span{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap}}
/* Phones: home (icon), chapter menu, search, level. Copy link moves into the chapter menu; the menu spans the bar. */
@media (max-width:600px){
  .spinal-app .sp-bar-inner{gap:6px}
  .spinal-app .sp-bar-home span{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap}
  .spinal-app .sp-bar-home{padding:0;width:44px;min-width:44px;box-sizing:border-box;justify-content:center}
  .spinal-app .sp-chnav{gap:6px}
  .spinal-app #sp-share{display:none}
  .spinal-app .sp-chmenu-share-li{display:block}
  .spinal-app .sp-chmenu{position:static}
  .spinal-app .sp-chmenu-panel{left:var(--site-gutter,16px);right:var(--site-gutter,16px);width:auto;max-width:none}
  .spinal-app .sp-chmenu-btn{padding:0 8px 0 10px;gap:6px;font-size:15px}
  .spinal-app .sp-bar-level .ra-level-btn{padding:0 6px}
}
@media (max-width:480px){.spinal-app .sp-chmenu-k{display:none}}
@media (max-width:420px){.spinal-app .sp-chmenu-btn{font-size:14px;padding:0 6px 0 9px}}
/* Phones: a 16px side gutter (as the regional block pages) and tighter bar gaps, so the chapter name has room. */
@media (max-width:480px){:root:has(body.spinal-app){--site-gutter:16px}}
@media (max-width:400px){.spinal-app .sp-bar-inner,.spinal-app .sp-chnav{gap:4px}.spinal-app .sp-chmenu-btn{gap:4px;padding:0 4px 0 6px}}
/* The level control's palette is the spinal one; "Back to MO" (after a deep link raised the level) hangs under the bar
   below 1024px, so the bar keeps its layout. */
.spinal-app .sp-bar-level .ra-level-k{color:var(--sp-muted)}
@media (max-width:1023px){
  .spinal-app .sp-bar-level .ra-level-back{position:absolute;top:calc(100% + 1px);right:var(--site-gutter,16px);z-index:55;border-top:0;box-shadow:0 6px 12px rgba(0,0,0,.08)}
}

/* Search: the sheet hangs from the bottom of the sticky bar, so it never covers it. */
.spinal-app .sp-sheet{position:absolute;z-index:56;left:0;right:0;top:100%;max-height:calc(100dvh - var(--ra-bar,56px) - 12px);overflow-y:auto;overscroll-behavior:contain;background:var(--sp-bg);border-bottom:2px solid var(--sp-accent);box-shadow:0 12px 24px rgba(0,0,0,.12)}
.spinal-app .sp-sheet[hidden]{display:none}
.spinal-app #sp-sheet-close{width:auto;padding:0 14px}
.spinal-app .sp-sheet-inner{padding-block:12px 16px}
.spinal-app .sp-search-row{display:flex;gap:8px;align-items:stretch}
.spinal-app .sp-search-input{flex:1;min-width:0;min-height:48px;padding:0 14px;border:1px solid var(--sp-line-strong);border-radius:0;background:var(--sp-surface);color:var(--sp-ink);font:16px/1.2 var(--sp-sans)}
.spinal-app .sp-sresults{list-style:none;margin:10px 0 0;padding:0;max-width:820px}
.spinal-app .sp-sresults:empty{display:none}
.spinal-app main .sp-sresults li,.spinal-app .sp-sheet .sp-sresults li{margin:0;max-width:none}
.spinal-app .sp-sres{display:block;padding:10px 12px;min-height:44px;border:1px solid var(--sp-line);border-top-width:0;background:var(--sp-surface);color:var(--sp-ink);text-decoration:none!important}
.spinal-app .sp-sresults li:first-child .sp-sres{border-top-width:1px}
.spinal-app .sp-sres:hover,.spinal-app .sp-sres:focus-visible{background:var(--sp-accent-soft)}
.spinal-app .sp-sres-t{display:block;font:500 15px/1.35 var(--sp-sans)}
.spinal-app .sp-sres-tier{font-weight:400;color:var(--sp-muted)}
.spinal-app .sp-sres-c{display:block;font:400 12px/1.6 var(--sp-mono);text-transform:uppercase;letter-spacing:.08em;color:var(--sp-accent)}
.spinal-app .sp-sres-s{display:block;font-size:14px;line-height:1.5;color:var(--sp-muted)}
.spinal-app .sp-sres mark{background:var(--sp-warn-bg);color:var(--sp-ink);padding:0 1px}
.spinal-app .sp-sres-none{padding:12px;color:var(--sp-muted);background:var(--sp-surface);border:1px solid var(--sp-line);list-style:none}

/* Hub */
.spinal-app .sp-hub{padding-block:32px 40px}
.spinal-app .sp-hub h1{font:400 clamp(38px,5vw,60px)/1.1 var(--sp-serif);letter-spacing:-.03em;margin:0 0 12px;color:var(--sp-ink)}
.spinal-app .sp-hub .sp-eyebrow{margin:0 0 12px}
.spinal-app .sp-hub .sp-lead{margin:0 0 8px}
.spinal-app .sp-hub .sp-credit{font-size:14px;line-height:1.6;color:var(--sp-muted);margin:0 0 22px}
.spinal-app .sp-hub-search{max-width:720px}
.spinal-app .sp-hub-h{font:400 clamp(24px,2.6vw,30px)/1.2 var(--sp-serif)!important;letter-spacing:-.02em;margin:36px 0 14px!important}
.spinal-app .sp-hub-note{font-size:14px;color:var(--sp-muted);margin:0 0 12px}
.spinal-app main .sp-tiles{list-style:none;padding:0;margin:0}
.spinal-app main .sp-tiles li{margin:0;max-width:none}
.spinal-app main .sp-tiles li+li{margin-top:0}
.spinal-app main a.sp-tile{display:flex;flex-direction:column;justify-content:center;gap:2px;min-height:64px;height:100%;box-sizing:border-box;padding:10px 14px;border:1px solid var(--sp-line-strong);border-left:4px solid var(--sp-accent);background:var(--sp-surface);color:var(--sp-ink);text-decoration:none}
.spinal-app main a.sp-tile:hover,.spinal-app main a.sp-tile:focus-visible{background:var(--sp-accent-soft)}
.spinal-app .sp-tile-t{font:500 16px/1.3 var(--sp-sans)}
.spinal-app .sp-tile-d{font-size:14px;line-height:1.4;color:var(--sp-muted)}
.spinal-app main .sp-hubch{list-style:none;margin:0;padding:0;display:grid;gap:0;max-width:820px;counter-reset:hubch}
.spinal-app main .sp-hubch li{margin:0;max-width:none;counter-increment:hubch;border-top:1px solid var(--sp-line)}
.spinal-app main .sp-hubch li:last-child{border-bottom:1px solid var(--sp-line)}
.spinal-app main .sp-hubch li+li{margin-top:0}
.spinal-app main .sp-hubch a{display:grid;grid-template-columns:28px 1fr;column-gap:10px;align-items:baseline;min-height:56px;padding:10px 4px;color:var(--sp-ink);text-decoration:none}
.spinal-app main .sp-hubch a::before{content:counter(hubch);grid-row:span 2;font:500 13px/1.6 var(--sp-mono);color:var(--sp-muted)}
.spinal-app main .sp-hubch a:hover,.spinal-app main .sp-hubch a:focus-visible{background:var(--sp-accent-soft)}
.spinal-app .sp-hubch-t{font:500 16px/1.35 var(--sp-sans)}
.spinal-app .sp-hubch-d{font-size:14px;line-height:1.45;color:var(--sp-muted)}
.spinal-app main .sp-levels-key{display:grid;gap:8px;margin:0;max-width:720px}
.spinal-app .sp-levels-key div{display:grid;grid-template-columns:92px 1fr;gap:10px;align-items:baseline;padding:8px 0;border-top:1px solid var(--sp-line)}
.spinal-app .sp-levels-key dt{font:500 14px/1.4 var(--sp-mono);color:var(--sp-accent)}
.spinal-app .sp-levels-key dd{margin:0;font-size:15px;line-height:1.5}

/* Layout utilities for chapter authors */
.spinal-app .sp-grid{display:grid;gap:10px;grid-template-columns:1fr;list-style:none;padding:0;margin:0 0 24px}
@media (min-width:600px){.spinal-app .sp-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}.spinal-app .sp-grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}.spinal-app .sp-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}}
.spinal-app .sp-box{padding:14px 16px;border:1px solid var(--sp-line);background:var(--sp-surface)}
.spinal-app .sp-scroll-x{overflow-x:auto;max-width:100%;-webkit-overflow-scrolling:touch}
.spinal-app .sp-nowrap{white-space:nowrap}

/* Previous / next chapter */
.spinal-app .sp-pager{display:grid;grid-template-columns:1fr;gap:8px;margin:32px 0 8px;padding-top:20px;border-top:1px solid var(--sp-line-strong)}
@media (min-width:700px){.spinal-app .sp-pager{grid-template-columns:1fr auto 1fr}}
.spinal-app main a.sp-pager-a{display:flex;flex-direction:column;justify-content:center;min-height:56px;padding:8px 14px;border:1px solid var(--sp-line-strong);background:var(--sp-surface);color:var(--sp-ink);text-decoration:none}
.spinal-app main a.sp-pager-a:hover,.spinal-app main a.sp-pager-a:focus-visible{background:var(--sp-accent-soft);border-color:var(--sp-accent)}
.spinal-app .sp-pager-a small{font:400 12px/1.5 var(--sp-mono);text-transform:uppercase;letter-spacing:.08em;color:var(--sp-muted)}
.spinal-app .sp-pager-a span{font:500 15px/1.35 var(--sp-sans)}
.spinal-app .sp-pager-next{text-align:right;align-items:flex-end}
.spinal-app .sp-pager-hub{align-items:center;text-align:center}

/* Print: current chapter only (the ward card relies on this) */
@media print{
  .spinal-app :is(.ntf-header,.ntf-footer,.sp-bar,.sp-sheet,.sp-pager,.sp-foot,.sp-skip,.sp-ch-kicker,.sp-ch-tools){display:none!important}
  body.spinal-app .sp-chapter:not(.is-current){display:none!important}
}

/* Desktop frame (≥ 1024 px; shared/regional/css/appnav.css): the chapters are in the rail, so the bar names the current
   chapter in its menu instead of repeating the list; the figure-beside-text splits wait for room beside the rail. */
@media (min-width:1024px){
  .spinal-app.ra-has-rail .sp-bar .sp-chlist{display:none!important}
  .spinal-app.ra-has-rail .sp-bar .sp-chmenu{display:block!important}
}
@media (min-width:1100px) and (max-width:1279px){
  .spinal-app.ra-has-rail .sp-split{grid-template-columns:minmax(0,1fr)}
  .spinal-app.ra-has-rail .sp-split>.sp-split-fig{position:static}
}
html[data-ra-autohide] .spinal-app .sp-split>.sp-split-fig{transition:top .2s cubic-bezier(.2,0,0,1)}
@media (prefers-reduced-motion:reduce){html[data-ra-autohide] .spinal-app .sp-split>.sp-split-fig{transition:none}}