/* Birdbird – site.css: design tokens, self-hosted fonts, base, site shell and the lab page template. */
@font-face{font-family:"Archivo";font-style:normal;font-display:swap;font-weight:100 900;font-stretch:62% 125%;src:url(fonts/archivo-latin-wdth-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Archivo";font-style:normal;font-display:swap;font-weight:100 900;font-stretch:62% 125%;src:url(fonts/archivo-latin-ext-wdth-normal.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"Public Sans";font-style:normal;font-display:swap;font-weight:400;src:url(fonts/public-sans-latin-400-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Public Sans";font-style:normal;font-display:swap;font-weight:500;src:url(fonts/public-sans-latin-500-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Public Sans";font-style:normal;font-display:swap;font-weight:600;src:url(fonts/public-sans-latin-600-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Public Sans";font-style:normal;font-display:swap;font-weight:700;src:url(fonts/public-sans-latin-700-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Public Sans";font-style:normal;font-display:swap;font-weight:400;src:url(fonts/public-sans-latin-ext-400-normal.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"Public Sans";font-style:normal;font-display:swap;font-weight:500;src:url(fonts/public-sans-latin-ext-500-normal.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"Public Sans";font-style:normal;font-display:swap;font-weight:600;src:url(fonts/public-sans-latin-ext-600-normal.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"Public Sans";font-style:normal;font-display:swap;font-weight:700;src:url(fonts/public-sans-latin-ext-700-normal.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-display:swap;font-weight:400;src:url(fonts/ibm-plex-mono-latin-400-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-display:swap;font-weight:500;src:url(fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-display:swap;font-weight:400;src:url(fonts/ibm-plex-mono-latin-ext-400-normal.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-display:swap;font-weight:500;src:url(fonts/ibm-plex-mono-latin-ext-500-normal.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}

/* =====================================================================
   Birdbird design system: "Chart-room"
   Paper, ink, one magenta accent (the aeronautical-chart route colour),
   data in mono. site.css = tokens, fonts, base, site shell, lab template.
   lab.css = components (sections, controls, readouts, callouts, quiz).
   ===================================================================== */
:root{
  /* colour */
  --paper:#EDF1EE; --sheet:#FFFFFF; --wash:#F5F7F5; --ink:#13202A; --ink-2:#4C5B66; --ink-3:#7D8B95;
  --rule:#C6D0D3; --rule-2:#DCE3E4;
  --accent:#9A1E68; --accent-hover:#82165A; --accent-wash:#F6EDF2;      /* actions and current state only */
  --info:#1D4E9E; --info-wash:#EEF3FA;                                  /* links to theory, notes */
  --ok:#2E7D4F; --caution:#B7791F; --warning:#B42318;                   /* status, inside instruments */
  --ok-wash:#EAF4EE; --caution-wash:#FBF3E4; --warning-wash:#FBECEA;
  --instrument:#10171D; --instrument-2:#18232C; --instrument-ink:#D7E1E6; --instrument-rule:#2A3742;
  /* legacy names still used by pages (keep) */
  --magenta:var(--accent); --chart-blue:var(--info); --inst:var(--instrument); --inst-2:var(--instrument-2);
  --bg:var(--paper); --panel:var(--sheet); --panel-2:#F6F8F6; --line:var(--rule); --fg:var(--ink); --muted:var(--ink-2);
  --smoke:var(--accent); --amber:var(--caution); --red:var(--warning); --green:var(--ok); --violet:#5B4BB0;
  /* type */
  --f-display:"Archivo","Arial Narrow",system-ui,sans-serif;
  --f-body:"Public Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
  --t-xs:13px; --t-sm:15px; --t-md:17px; --t-lg:20px; --t-xl:26px; --t-2xl:34px; --t-3xl:48px; --t-4xl:64px;
  /* space (4px base) */
  --s-1:4px; --s-2:8px; --s-3:12px; --s-4:16px; --s-5:24px; --s-6:32px; --s-7:48px; --s-8:72px;
  /* layout */
  --container:1240px; --gutter:24px;
  --gl:max(var(--gutter),env(safe-area-inset-left,0px)); --gr:max(var(--gutter),env(safe-area-inset-right,0px));
  --radius:3px; --radius-lg:6px; --shadow-pop:0 14px 34px rgba(19,32,42,.16);
  color-scheme:light;
}
@media (min-width:900px){:root{--gutter:48px}}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
html,body{margin:0}
[hidden]{display:none!important}
body{background:var(--paper);color:var(--ink);font-family:var(--f-body);font-size:var(--t-sm);line-height:1.55;font-variant-numeric:tabular-nums;
  padding:0 var(--gr) 32px var(--gl);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:var(--accent);text-underline-offset:2px}
button,input,select,textarea{font-family:inherit}
::selection{background:#E9CFDF}
button:focus-visible,input:focus-visible,a:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--info);outline-offset:2px}

/* one container */
.container,.page{max-width:var(--container);margin-inline:auto;width:100%}

/* ---------------- SiteHeader ---------------- */
.site{position:relative;z-index:30;margin:0 calc(-1*var(--gr)) 0 calc(-1*var(--gl));padding:0 var(--gr) 0 var(--gl);
  padding-top:env(safe-area-inset-top,0px);background:var(--paper);border-bottom:1px solid var(--rule);font-family:var(--f-body)}
.site>.in{max-width:var(--container);margin:0 auto;display:flex;align-items:center;gap:32px;min-height:60px}
.site .logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);flex:0 0 auto}
.site .logo svg{width:28px;height:28px;display:block}
.site .logo span{font-family:var(--f-display);font-stretch:88%;font-weight:750;font-size:23px;letter-spacing:-.01em;line-height:1}
.site nav{display:flex;gap:4px 26px;flex:1 1 auto;flex-wrap:wrap;align-self:stretch}
.site nav a{display:flex;align-items:center;font-size:15px;font-weight:500;color:var(--ink-2);text-decoration:none;position:relative;white-space:nowrap}
.site nav a:hover{color:var(--ink)}
.site nav a.on{color:var(--ink);font-weight:600}
.site nav a.on::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--accent)}
.site .hright{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.site .hright .seg button{padding:4px 9px;font-size:13px;min-height:0}
.site .cta{flex:0 0 auto;text-decoration:none}
.site .menu{display:none;margin-left:auto;background:var(--sheet);border:1px solid var(--rule);color:var(--ink);border-radius:var(--radius);padding:7px 12px;font-size:14px;font-weight:600;cursor:pointer;align-items:center;gap:8px}
.site .menu i{display:block;width:14px;height:10px;background:linear-gradient(var(--ink),var(--ink)) 0 0/100% 2px no-repeat,linear-gradient(var(--ink),var(--ink)) 0 4px/100% 2px no-repeat,linear-gradient(var(--ink),var(--ink)) 0 8px/100% 2px no-repeat}
.site .rank{text-decoration:none;display:flex;align-items:center;gap:10px;color:var(--ink);padding:4px 0}
.site .rank:hover .rn{text-decoration:underline}
.site .rank .rn{font-weight:600;font-size:14px;white-space:nowrap}
.site .rank .rb{width:56px;height:4px;background:var(--rule-2);overflow:hidden;flex:0 0 56px}
.site .rank .rb i{display:block;height:100%;background:var(--accent)}
.site .rank .rx{font-family:var(--f-mono);font-size:12px;color:var(--ink-2);white-space:nowrap}
@media (max-width:1320px){.site .rank{display:none}}
@media (max-width:1060px){.site>.in{gap:22px}.site nav{gap:4px 18px}.site nav a{font-size:14px}}
@media (max-width:960px){
  .site>.in{flex-wrap:wrap;gap:0 14px;min-height:56px}
  .site .logo{order:1}
  .site .menu{display:inline-flex;order:3;margin-left:0}
  .site .hright{order:2;margin-left:auto}
  .site nav{display:none;order:4;flex-basis:100%;flex-direction:column;gap:0;padding:4px 0 10px}
  .site nav a{padding:11px 0;border-bottom:1px solid var(--rule-2);font-size:16px}
  .site nav a:last-child{border-bottom:0}
  .site nav a.on{color:var(--accent)}
  .site nav a.on::after{display:none}
  .site.open nav{display:flex}
  .site .rank .rb,.site .rank .rx{display:none}
}

/* search bar injected by search.js: align to the container */
html body .nsearch{margin:0 calc(-1*var(--gr)) 0 calc(-1*var(--gl));padding:10px var(--gr) 10px var(--gl);background:var(--wash);border-bottom:1px solid var(--rule-2)}
html body .nsearch .in{max-width:var(--container);border-color:var(--rule);border-radius:var(--radius-lg)}
html body .nsearch input{font-size:15px;padding:9px 0}
html body .nsearch .hint{display:none!important}
html body .nsearch .res{max-width:var(--container);left:var(--gl);right:var(--gr)}

/* ---------------- SectionNav (one tab bar per hub) ---------------- */
.trnav{position:relative;z-index:29;margin:0 calc(-1*var(--gr)) 0 calc(-1*var(--gl));padding:0 var(--gr) 0 var(--gl);background:var(--paper);border-bottom:1px solid var(--rule)}
.trnav>.in{max-width:var(--container);margin:0 auto;display:flex;flex-wrap:nowrap;gap:0 26px;overflow-x:auto;scrollbar-width:none}
.trnav>.in::-webkit-scrollbar{display:none}
.trnav a{flex:0 0 auto;font-size:14px;font-weight:500;color:var(--ink-2);text-decoration:none;padding:12px 0 11px;border-bottom:2px solid transparent;margin-bottom:-1px;white-space:nowrap}
.trnav a:hover{color:var(--ink)}
.trnav a.on{color:var(--ink);border-bottom-color:var(--accent);font-weight:600}
.site:has(+.trnav){border-bottom-color:var(--rule-2)}
@media (max-width:760px){.trnav>.in{gap:0 20px;mask-image:linear-gradient(90deg,#000 88%,transparent);-webkit-mask-image:linear-gradient(90deg,#000 88%,transparent)}}

/* ---------------- Footer (groups match the top nav) ---------------- */
.sitefoot{margin:72px auto 0;max-width:var(--container);border-top:1px solid var(--rule);padding-top:32px;display:grid;grid-template-columns:minmax(0,1.5fr) repeat(4,minmax(0,1fr));gap:32px 24px;font-family:var(--f-body);font-size:14px;color:var(--ink-2)}
.sitefoot b{display:block;color:var(--ink);font-size:14px;font-weight:600;margin-bottom:10px}
.sitefoot .fb .logo{display:flex;align-items:center;gap:8px;color:var(--ink);text-decoration:none;margin-bottom:10px}
.sitefoot .fb .logo svg{width:22px;height:22px}
.sitefoot .fb .logo span{font-family:var(--f-display);font-stretch:88%;font-weight:750;font-size:19px}
.sitefoot .fb p{margin:0 0 12px;max-width:34ch}
.sitefoot a{display:block;color:var(--ink-2);text-decoration:none;padding:3px 0}
.sitefoot a:hover{color:var(--accent);text-decoration:underline}
.sitefoot .copy{grid-column:1/-1;border-top:1px solid var(--rule-2);padding-top:16px;font-size:13px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
@media (max-width:960px){.sitefoot{grid-template-columns:repeat(2,minmax(0,1fr))}.sitefoot .fb{grid-column:1/-1}}
@media (max-width:420px){.sitefoot{gap:24px 16px}}

.ntoast{position:fixed;right:20px;bottom:20px;z-index:100;background:var(--ink);border-radius:var(--radius);padding:12px 16px;display:flex;flex-direction:column;gap:2px;font-family:var(--f-body);color:#fff;box-shadow:0 10px 30px rgba(19,32,42,.25);transform:translateY(12px);opacity:0;pointer-events:none;transition:.2s}
.ntoast.on{transform:none;opacity:1}
.ntoast b{font-size:15px;color:#fff}.ntoast span{font-size:13px;color:var(--rule)}
@media (prefers-reduced-motion:reduce){.ntoast{transition:none}}
.ntip{display:flex;gap:6px 18px;align-items:baseline;flex-wrap:wrap;max-width:860px;margin:14px 0 4px;padding:10px 16px;background:var(--sheet);border:1px solid var(--rule);border-left:3px solid var(--info)}
.ntip .nh{font-family:var(--f-display);font-stretch:88%;font-size:17px;font-weight:700;color:var(--info);line-height:1}
.ntip p{margin:0;font-family:var(--f-body);font-size:15px;color:var(--ink);flex:1 1 380px}

/* ---------------- PageHeader ---------------- */
.lhead{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px 24px;margin:40px 0 8px}
.lhead .brand{min-width:0;flex:1 1 560px}
.eyebrow{display:none}
.lhead .eyebrow,.eyebrow.on{display:block;font-family:var(--f-mono);font-size:12px;font-weight:500;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-2);margin:0 0 12px}
.lhead .eyebrow a{color:inherit;text-decoration:none}.lhead .eyebrow a:hover{color:var(--accent)}
.brand h1,.lhead h1{font-family:var(--f-display);font-stretch:88%;font-weight:750;font-size:clamp(34px,4.2vw,var(--t-3xl));letter-spacing:-.015em;margin:0;line-height:1.04;text-wrap:balance;color:var(--ink)}
.brand p,.lhead .brand>p{margin:14px 0 0;color:var(--ink-2);font-size:var(--t-md);line-height:1.5;max-width:64ch}
.lhead .hright{display:flex;align-items:center;gap:10px}
.lhead .hright:empty{display:none}
.lmeta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px;margin:20px 0 0;font-size:13px;color:var(--ink-2)}
.lmeta .mi{display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.lmeta .mi+.mi{padding-left:20px;border-left:1px solid var(--rule)}
.lmeta .k{color:var(--ink-2)}
.lmeta .v{font-family:var(--f-mono);font-size:12.5px;color:var(--ink);font-weight:500}
.lmeta .pbar{width:64px;height:4px;background:var(--rule-2);display:inline-block;overflow:hidden}
.lmeta .pbar i{display:block;height:100%;background:var(--ok)}
.lmeta .status{font-size:13px}
@media (max-width:600px){.lmeta{gap:10px 16px}.lmeta .mi+.mi{padding-left:0;border-left:0}.lhead{margin-top:24px}}

/* ---------------- Tags (one component) ---------------- */
.tag,.lvt{display:inline-flex;align-items:center;gap:4px;font-family:var(--f-mono);font-size:11px;font-weight:500;letter-spacing:.04em;line-height:1;text-transform:uppercase;
  padding:4px 6px 3px;border:1px solid currentColor;border-radius:2px;white-space:nowrap;color:var(--ink-2);background:transparent;vertical-align:middle}
.tag.lt,.lvt.lv-la{color:#3F5F4E}
.tag.a320,.lvt.lv-jet{color:var(--info)}
.tag.b200{color:#7A4E12}
.tag.core{color:var(--ink-2)}
.tag.solid{color:#fff;background:var(--ink);border-color:var(--ink)}
.tag.accent{color:var(--accent)}
.tag.ok{color:var(--ok)}.tag.caution{color:var(--caution)}.tag.warning{color:var(--warning)}

/* ---------------- Lab template ---------------- */
/* module bar (lab.js renders into nav.labnav) */
.labnav{position:relative;z-index:35;display:flex;align-items:center;gap:6px 14px;margin:24px 0 0;padding:0 0 12px;border-bottom:1px solid var(--rule);font-size:14px;min-height:44px}
.labnav .lb-home{color:var(--ink-2);text-decoration:none;font-weight:500;white-space:nowrap}
.labnav .lb-home:hover{color:var(--accent)}
.labnav .lb-sep{color:var(--rule)}
.labnav .lb-mod{position:relative;min-width:0}
.labnav .lb-btn{display:inline-flex;align-items:center;gap:8px;max-width:100%;background:var(--sheet);border:1px solid var(--rule);border-radius:var(--radius);padding:6px 10px;font:inherit;font-size:14px;font-weight:600;color:var(--ink);cursor:pointer;white-space:nowrap}
.labnav .lb-btn:hover,.labnav .lb-mod.open .lb-btn{border-color:var(--ink)}
.labnav .lb-btn .n{font-family:var(--f-mono);font-size:12px;font-weight:500;color:var(--ink-2)}
.labnav .lb-btn .nm{overflow:hidden;text-overflow:ellipsis}
.labnav .lb-btn .car{width:8px;height:8px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:translateY(-2px) rotate(45deg);flex:0 0 auto;margin-left:2px}
.labnav .lb-mod.open .lb-btn .car{transform:translateY(2px) rotate(-135deg)}
.labnav .lb-cur{color:var(--ink-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
.labnav .lb-pn{margin-left:auto;display:flex;gap:6px;flex:0 0 auto}
.labnav .lb-pn a{display:inline-flex;align-items:center;gap:6px;text-decoration:none;color:var(--ink-2);border:1px solid transparent;border-radius:var(--radius);padding:6px 8px;white-space:nowrap;max-width:280px}
.labnav .lb-pn a span{overflow:hidden;text-overflow:ellipsis}
.labnav .lb-pn a:hover{color:var(--ink);border-color:var(--rule);background:var(--sheet)}
.labnav .lb-pn a.nx{color:var(--ink);font-weight:600}
.labnav .lb-menu{display:none;position:absolute;top:calc(100% + 8px);left:0;width:min(940px,calc(100vw - var(--gl) - var(--gr)));background:var(--sheet);border:1px solid var(--rule);border-radius:var(--radius-lg);box-shadow:var(--shadow-pop);padding:20px 22px 22px;
  grid-template-columns:repeat(3,minmax(0,1fr));gap:20px 28px}
.labnav .lb-mod.open .lb-menu{display:grid}
.labnav .lb-g b{display:flex;gap:8px;align-items:baseline;font-family:var(--f-display);font-stretch:92%;font-size:15px;font-weight:650;color:var(--ink);padding:0 0 6px;margin:0 0 4px;border-bottom:1px solid var(--rule-2)}
.labnav .lb-g b i{font-style:normal;font-family:var(--f-mono);font-size:11.5px;font-weight:500;color:var(--ink-3)}
.labnav .lb-g b a{color:inherit;text-decoration:none}.labnav .lb-g b a:hover{color:var(--accent)}
.labnav .lb-g>a{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:5px 8px;margin:0 -8px;border-radius:var(--radius);font-size:14px;color:var(--ink-2);text-decoration:none;line-height:1.3}
.labnav .lb-g>a:hover{background:var(--wash);color:var(--ink)}
.labnav .lb-g>a.on{background:var(--accent-wash);color:var(--ink);font-weight:600;box-shadow:inset 2px 0 0 var(--accent)}
.labnav .lb-g>a .d{flex:0 0 auto;width:7px;height:7px;border-radius:50%;background:var(--ok)}
.labnav .lb-g .tag{font-size:10px;padding:3px 4px 2px}
@media (max-width:960px){.labnav .lb-menu{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:760px){
  .labnav{margin-top:14px;padding-bottom:10px;gap:8px}
  .labnav .lb-sep,.labnav .lb-cur{display:none}
  .labnav .lb-btn .nm{display:none}
  .labnav .lb-pn a span{display:none}
  .labnav .lb-pn a{border-color:var(--rule);background:var(--sheet);padding:6px 10px}
  .labnav .lb-menu{position:fixed;left:var(--gl);right:var(--gr);width:auto;top:auto;max-height:70vh;overflow:auto;grid-template-columns:minmax(0,1fr);padding:14px 16px;gap:14px}
}

/* InPageNav: sticky bar on desktop, "On this page" select on mobile */
.snav{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;display:flex;gap:2px 24px;flex-wrap:wrap;margin:24px 0 0;padding:0;background:var(--paper);border-bottom:1px solid var(--rule);box-shadow:0 -1px 0 var(--paper)}
.snav a{font-size:14px;font-weight:500;color:var(--ink-2);text-decoration:none;padding:11px 0 10px;border-bottom:2px solid transparent;margin-bottom:-1px;white-space:nowrap}
.snav a:hover{color:var(--ink)}
.snav a.on{color:var(--ink);border-bottom-color:var(--accent)}
.snav .snsel{display:none}
@media (max-width:760px){
  .snav{flex-wrap:nowrap;gap:0;padding:8px 0;margin-top:20px}
  .snav.hassel>a{display:none}
  .snav .snsel{display:flex;align-items:center;gap:10px;width:100%;font-size:13px;color:var(--ink-2)}
  .snav .snsel span{white-space:nowrap;font-family:var(--f-mono);font-size:11.5px;letter-spacing:.05em;text-transform:uppercase}
  .snav .snsel select{flex:1;min-width:0;font:inherit;font-size:15px;font-weight:600;color:var(--ink);background:var(--sheet);border:1px solid var(--rule);border-radius:var(--radius);padding:8px 10px;min-height:40px}
}

/* sections in lab pages show their number eyebrow */
.vlab .card>.eyebrow,.vlab .card>div>.eyebrow,.vlab .card>header .eyebrow{display:block;font-family:var(--f-mono);font-size:11.5px;font-weight:500;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3);margin:0 0 6px}

/* previous / next at the end of every lab */
.vlpath{margin-top:48px;border-top:1px solid var(--ink);font-size:14px}
.vlpath .ph{display:flex;justify-content:space-between;gap:10px;padding:10px 0;font-family:var(--f-mono);font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-2)}
.vlpath .pr{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.vlpath .pr a{display:flex;flex-direction:column;gap:4px;padding:16px 18px;text-decoration:none;color:var(--ink);background:var(--sheet);border:1px solid var(--rule);border-radius:var(--radius)}
.vlpath .pr a+a{text-align:right}
.vlpath .pr a small{font-size:13px;color:var(--ink-2)}
.vlpath .pr a b{font-family:var(--f-display);font-stretch:92%;font-size:19px;font-weight:650;line-height:1.2}
.vlpath .pr a:hover{border-color:var(--ink)}
.vlpath .pr a.nx{border-color:var(--ink)}
.vlpath .pr a.nx:hover{box-shadow:inset 0 -2px 0 var(--accent)}
.vlpath .pr a.x{visibility:hidden}
.vlpath .steps{display:flex;gap:3px;padding:14px 0 0}
.vlpath .steps i{flex:1;height:4px;background:var(--rule-2)}
.vlpath .steps i.d{background:var(--ok)}
.vlpath .steps i.c{background:var(--accent)}
@media (max-width:600px){.vlpath .pr{grid-template-columns:1fr}.vlpath .pr a+a{text-align:left}.vlpath .pr a.x{display:none}}

/* touch: larger targets (iPad, phone) */
@media (pointer:coarse){
  .site .lang button,.site .lang a{min-height:36px;min-width:44px}
  input[type=checkbox],input[type=radio]{width:20px;height:20px}
  input[type=range]{height:32px}
  .seg button,.tg button,.mktools .tg button,.dtools .tg button,.tabs button,.modetabs button{min-height:40px}
  .site .hright .seg button{min-height:34px;min-width:40px}
  .btn{min-height:40px}
  select,input[type=text],input:not([type]),input[inputmode]{min-height:38px}
}
@media print{.site,.sitefoot,.nsearch,.labnav,.snav,.vlpath,.trnav{display:none!important}body{background:#fff}}
/* language switch in the site header: identical on every page */
.site .hright .langseg{display:flex;gap:0;margin:0}
.site .hright .langseg button{flex:0 0 auto;font-family:var(--f-body);font-size:13px;font-weight:600;line-height:1.2;background:var(--sheet);color:var(--ink-2);border:1px solid var(--rule);margin:0 0 0 -1px;border-radius:0;padding:5px 10px;cursor:pointer}
.site .hright .langseg button:first-child{margin-left:0;border-radius:var(--radius) 0 0 var(--radius)}
.site .hright .langseg button:last-child{border-radius:0 var(--radius) var(--radius) 0}
.site .hright .langseg button.on{background:var(--ink);color:#fff;border-color:var(--ink);position:relative;z-index:1}

/* Min trening: snarvei i toppen */
.site .mytr{font-size:14px;font-weight:600;color:var(--ink);text-decoration:none;padding:6px 12px;border:1px solid var(--rule);border-radius:var(--radius,3px);background:var(--sheet);white-space:nowrap}
.site .mytr:hover{border-color:var(--ink)}
.site .mytr.on{border-color:var(--accent);color:var(--accent)}
.site nav a.mob{display:none}
@media (max-width:900px){.site .mytr{display:none}.site nav a.mob{display:block}}