/* BoilerCodes: the site reads like the front of a boiler. White enamel casing,
   a backlit LCD for every code, and gauge colours for how serious it is. */
:root{
  --ground:#ffffff; --casing:#eef0eb; --casing-edge:#dcdfd8; --ink:#1d2220; --muted:#59615d; --line:#d9ddd6;
  --lcd:#c4d76a; --lcd-hi:#d5e48c; --seg:#1e2a12; --ghost:rgba(30,42,18,.085); --lcd-ink:#26331a;
  --ok:#23804a; --warn:#a86400; --stop:#c3271e; --ok-soft:#e2f1e7; --warn-soft:#f8ead2; --stop-soft:#f8e1df;
  --link-line:#9db33a; --btn:#1d2220; --btn-ink:#ffffff; --focus:#2f6fd6;
  --f-head:"Archivo","Arial Black",Arial,sans-serif;
  --f-body:"Atkinson Hyperlegible",Verdana,Arial,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){:root{
  --ground:#131614; --casing:#1d211e; --casing-edge:#2b302c; --ink:#e9ece6; --muted:#a3aba5; --line:#2e3430;
  --ok:#62c78c; --warn:#f0a83a; --stop:#ff7d72; --ok-soft:#173022; --warn-soft:#33260f; --stop-soft:#3a1714;
  --link-line:#c4d76a; --btn:#c4d76a; --btn-ink:#1e2a12; --focus:#8fb4ff; color-scheme:dark}}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{background:var(--ground);color:var(--ink);font:400 1.125rem/1.55 var(--f-body);margin:0}
a{color:inherit;text-decoration-color:var(--link-line);text-decoration-thickness:2px;text-underline-offset:3px}
a:hover{text-decoration-color:currentColor}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
img,svg{max-width:100%}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px}.skip:focus{left:16px;top:8px;background:var(--ground);padding:.4rem .7rem;z-index:9}

/* segments: shared by every readout */
.seg polygon,.seg circle{fill:var(--ghost)}
.seg .on{fill:var(--seg)}

.gas{background:var(--stop);color:#fff;font-weight:700;font-size:.95rem;line-height:1.35;padding:.55rem 16px;text-align:center}
.gas a{color:#fff;text-decoration-color:rgba(255,255,255,.6);white-space:nowrap}
@media (prefers-color-scheme: dark){.gas{background:#a3201a}}

.top,.wrap,.foot{max-width:62rem;margin:0 auto;padding-inline:16px}
.top{display:flex;align-items:center;justify-content:space-between;gap:.75rem 1.5rem;flex-wrap:wrap;padding-block:1rem}
.mark{display:flex;align-items:center;gap:.6rem;text-decoration:none;font:800 1.35rem/1 var(--f-head);font-stretch:118%;letter-spacing:-.01em}
.mark .chip-lcd{width:2.6rem;padding:.3rem .35rem;border-radius:6px}
.top nav{display:flex;gap:.25rem 1.1rem;flex-wrap:wrap}
.top nav a{text-decoration:none;font-weight:700;font-size:1rem;padding:.2rem 0;border-bottom:2px solid transparent}
.top nav a:hover{border-bottom-color:var(--link-line)}

.wrap{display:grid;gap:3rem;padding-block:.5rem 4rem}
.wrap>*{min-width:0}
.col{max-width:44rem}
h1,h2,h3{font-family:var(--f-head);font-weight:800;margin:0;text-wrap:balance;letter-spacing:-.015em}
h1{font-size:clamp(2.1rem,7.2vw,3.5rem);line-height:1.02;font-stretch:112%}
h2{font-size:clamp(1.45rem,4vw,1.85rem);line-height:1.12;font-stretch:108%;margin-bottom:.6rem}
h3{font-size:1.15rem;font-stretch:105%}
p{margin:.5rem 0;max-width:42rem}
.lede{font-size:1.2rem;color:var(--muted);margin-top:.75rem}
.crumbs{font-size:.95rem;color:var(--muted);margin-bottom:-1.5rem}
.crumbs a{color:var(--muted)}

/* the LCD window */
.screen{background:linear-gradient(175deg,var(--lcd-hi),var(--lcd) 60%);color:var(--lcd-ink);border-radius:12px;
  box-shadow:inset 0 3px 10px rgba(0,0,0,.28),inset 0 0 0 1px rgba(0,0,0,.15)}
.chip-lcd{display:inline-flex;background:var(--lcd);border-radius:6px;box-shadow:inset 0 1px 4px rgba(0,0,0,.25);padding:.35rem .55rem}
.chip-lcd .seg{height:1.35rem;width:auto}

/* homepage: the boiler front */
.hero{display:grid;gap:1.5rem}
.hero h1{max-width:16ch}
.casing{background:var(--casing);border-radius:28px;padding:clamp(14px,3.5vw,28px);display:grid;gap:1rem;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.7),inset 0 -3px 0 var(--casing-edge),0 1px 0 var(--casing-edge)}
.casing .screen{padding:.9rem 1.1rem 1rem;display:grid;gap:.5rem;min-height:12rem}
.scr-top{display:flex;justify-content:space-between;align-items:center;gap:1rem;font-weight:700;font-size:.95rem}
.scr-icons{display:flex;gap:.5rem}
.scr-icons svg{width:1.3rem;height:1.3rem;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;opacity:.16}
.scr-icons svg.lit{opacity:1}
.scr-code .seg{height:clamp(4.2rem,17vw,6.5rem);width:auto;display:block}
.scr-msg{min-height:3em;font-size:1.05rem;line-height:1.35;margin:0}
.controls{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:.75rem}
@media (max-width:560px){.controls{grid-template-columns:1fr}}
.field label{display:block;font-weight:700;font-size:.95rem;margin-bottom:.3rem}
select,input{width:100%;font:inherit;color:var(--ink);background:var(--ground);border:2px solid var(--line);border-radius:10px;padding:.65rem .8rem}
select:focus,input:focus{border-color:var(--ink);outline:none}
input#code{font:800 1.4rem var(--f-head);font-stretch:112%;letter-spacing:.04em;text-transform:uppercase}
.hint{font-size:.95rem;color:var(--muted);margin:0}
.matches{list-style:none;margin:0;padding:0;display:grid;gap:.4rem}
.matches a{display:grid;grid-template-columns:5.5rem minmax(0,1fr);gap:.9rem;align-items:center;text-decoration:none;
  background:var(--ground);border-radius:12px;padding:.55rem .7rem;border:2px solid transparent}
.matches a:hover,.matches li.on a{border-color:var(--ink)}
.matches .chip-lcd{justify-content:center}
.matches em{display:block;font-style:normal;font-size:.85rem;color:var(--warn);font-weight:700}

/* symptom finder: physical buttons */
.keys{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.6rem}
@media (max-width:760px){.keys{grid-template-columns:repeat(2,minmax(0,1fr))}}
.key{display:flex;flex-direction:column;align-items:flex-start;gap:.7rem;text-align:left;font:700 1.02rem/1.25 var(--f-body);color:var(--ink);
  background:var(--casing);border:0;border-radius:16px;padding:.95rem .9rem 1rem;cursor:pointer;text-decoration:none;
  box-shadow:inset 0 -4px 0 var(--casing-edge);transition:transform .08s}
.key:active{transform:translateY(2px)}
.key svg{width:1.9rem;height:1.9rem;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.key[aria-expanded="true"]{background:var(--ink);color:var(--ground);box-shadow:none}
.ask{grid-column:1/-1;border-left:4px solid var(--ink);padding:.3rem 0 .3rem 1rem;display:grid;gap:.6rem}
.ask h3{font-size:1.2rem}
.answers{display:flex;flex-wrap:wrap;gap:.5rem}
.answers button{font:700 1rem var(--f-body);color:var(--ink);background:var(--ground);border:2px solid var(--ink);border-radius:99px;padding:.45rem 1rem;cursor:pointer}
.answers button[aria-pressed="true"]{background:var(--ink);color:var(--ground)}
.result{margin:0;max-width:40rem}
.result .soon{display:block;color:var(--muted);font-size:.95rem;margin-top:.3rem}

/* brand list with each maker's pressure range */
.brands{list-style:none;margin:0;padding:0;border-top:2px solid var(--ink)}
.brands li{border-bottom:1px solid var(--line)}
.brands a{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:1rem;align-items:center;padding:.9rem .2rem;text-decoration:none}
.brands a:hover b{text-decoration:underline;text-decoration-color:var(--link-line);text-decoration-thickness:2px}
.brands b{font:800 clamp(1.2rem,3.6vw,1.6rem)/1.1 var(--f-head);font-stretch:112%}
.brands .range{display:flex;align-items:center;gap:.5rem;font-size:.95rem;color:var(--muted);font-variant-numeric:tabular-nums}
.brands .n{font-size:.95rem;color:var(--muted);min-width:4.5rem;text-align:right;font-variant-numeric:tabular-nums}
@media (max-width:560px){.brands a{grid-template-columns:minmax(0,1fr) auto}.brands .n{grid-column:1;text-align:left;margin-top:-.6rem}.brands .range{grid-row:1/3;grid-column:2}}
.mini{width:3rem;height:1.8rem;flex:none}
.mini .t{stroke:var(--line);stroke-width:5;fill:none}
.mini .g{stroke:var(--ok);stroke-width:5;fill:none}
.popular{display:flex;flex-wrap:wrap;gap:.5rem}
.popular a{display:flex;align-items:center;gap:.55rem;text-decoration:none;font-weight:700;font-size:.95rem;padding:.3rem .65rem .3rem .3rem;border-radius:10px;background:var(--casing)}
.popular a:hover{box-shadow:inset 0 0 0 2px var(--ink)}
.popular .chip-lcd .seg{height:1.15rem}

/* code page */
.readout{display:flex;align-items:flex-end;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding:1rem 1.2rem}
.readout .seg{height:clamp(4.5rem,18vw,7.5rem);width:auto;display:block;max-width:100%}
.readout .who{font-weight:700;font-size:1rem}
.meter{display:grid;gap:.5rem;max-width:36rem}
.meter-bar{display:grid;grid-template-columns:repeat(3,1fr);gap:4px}
.meter-bar span{height:.7rem;border-radius:3px;opacity:.22}
.meter-bar .z-ok{background:var(--ok)} .meter-bar .z-warn{background:var(--warn)} .meter-bar .z-stop{background:var(--stop)}
.meter-bar .here{opacity:1;position:relative}
.meter-bar .here::after{content:"";position:absolute;left:50%;top:-.65rem;margin-left:-.45rem;border:.45rem solid transparent;border-top-color:var(--ink)}
.meter-labels{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;font-size:.85rem;color:var(--muted)}
.meter-labels .here{color:var(--ink);font-weight:700}
.verdict-line{font:800 1.3rem/1.2 var(--f-head);font-stretch:108%;margin:0}
.v-ok{color:var(--ok)} .v-warn{color:var(--warn)} .v-stop{color:var(--stop)}
.plain{font-size:1.2rem;max-width:42rem;margin:0}
ol.steps{margin:0;padding:0;list-style:none;counter-reset:s;display:grid;gap:.8rem;max-width:42rem}
ol.steps li{counter-increment:s;display:grid;grid-template-columns:2.2rem minmax(0,1fr);gap:.6rem}
ol.steps li::before{content:counter(s);font:800 1.05rem/2.1rem var(--f-head);text-align:center;width:2.1rem;height:2.1rem;border-radius:50%;background:var(--casing)}
ul.tick{margin:0;padding:.2rem 0 .2rem 1rem;list-style:none;border-left:4px solid var(--muted);display:grid;gap:.5rem;max-width:42rem}
ul.call{margin:0;padding:.2rem 0 .2rem 1rem;list-style:none;border-left:4px solid var(--stop);display:grid;gap:.5rem;max-width:42rem}
.none{margin:0;color:var(--muted)}
.btn{display:inline-block;background:var(--btn);color:var(--btn-ink);font:700 1.05rem var(--f-body);text-decoration:none;border:0;border-radius:12px;padding:.8rem 1.2rem;cursor:pointer}
.cta{display:flex;flex-wrap:wrap;gap:.6rem 1rem;align-items:center;margin-top:1.2rem}
.cta small{color:var(--muted);font-size:.9rem}
.applies{font-size:.95rem;color:var(--muted);margin:0}
.stack{display:grid;gap:1.6rem}
.nearby{display:flex;flex-wrap:wrap;gap:.45rem}
.nearby a{text-decoration:none;border-radius:8px}
.nearby a:hover .chip-lcd{box-shadow:inset 0 0 0 2px var(--seg)}

.faq details{border-bottom:1px solid var(--line);padding:.8rem 0;max-width:44rem}
.faq summary{cursor:pointer;font-weight:700}
.faq details p{margin:.5rem 0 0}

.table{overflow-x:auto;border-top:2px solid var(--ink)}
table{border-collapse:collapse;width:100%;font-size:1rem}
th,td{text-align:left;padding:.65rem .7rem .65rem 0;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:.9rem;color:var(--muted);font-weight:700}
td.c{font:800 1.05rem var(--f-head);font-stretch:108%;white-space:nowrap}
td.c a{text-decoration:none}
.dot{display:inline-block;width:.6rem;height:.6rem;border-radius:50%;margin-right:.4rem;vertical-align:.05rem}
.d-ok{background:var(--ok)} .d-warn{background:var(--warn)} .d-stop{background:var(--stop)}
.filter{display:grid;gap:.35rem;max-width:26rem}
.filter label{font-weight:700;font-size:.95rem}
.note{background:var(--casing);border-radius:18px;padding:1.1rem 1.2rem}
.src{font-size:.95rem;color:var(--muted)}
.src h2{font-size:1.1rem}
.src ul{margin:0;padding-left:1.1rem}
.prose{max-width:44rem}
.prose ol,.prose ul{padding-left:1.3rem;display:grid;gap:.4rem}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));gap:.6rem}
.card{background:var(--casing);border-radius:16px;padding:1rem 1.1rem;text-decoration:none;box-shadow:inset 0 -4px 0 var(--casing-edge)}
.card h2{font-size:1.2rem;margin:0 0 .3rem}
.card p{margin:0;color:var(--muted);font-size:1rem}

.foot{border-top:2px solid var(--ink);padding-block:1.3rem 2.5rem;font-size:.95rem;color:var(--muted);display:grid;gap:.6rem}
.foot p{margin:0}
.foot ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.3rem 1.2rem}
.foot a{color:var(--ink)}

/* brand-aware pressure gauge */
.gauge2{background:var(--casing);border-radius:22px;padding:1.1rem;display:grid;gap:1rem;--zc:var(--ok)}
.gauge2[data-level="amber"]{--zc:var(--warn)} .gauge2[data-level="red"]{--zc:var(--stop)} .gauge2[data-level="green"]{--zc:var(--ok)}
.g-fallback{margin:0;color:var(--muted)}
.g-brands{display:flex;flex-wrap:wrap;gap:.4rem}
.g-brands button{font:700 .92rem var(--f-body);color:var(--ink);background:var(--ground);border:2px solid var(--line);border-radius:99px;padding:.3rem .8rem;cursor:pointer}
.g-brands button:hover{border-color:var(--ink)}
.g-brands button[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--ground)}
.g-body{display:grid;grid-template-columns:minmax(0,15rem) 1fr;gap:1.25rem;align-items:start}
@media (max-width:560px){.g-body{grid-template-columns:1fr}.g-dial{max-width:17rem;margin:0 auto;width:100%}}
.g-dial svg{width:100%;height:auto;display:block}
.g-track{stroke:var(--line);stroke-width:16;fill:none}
.g-zones{transition:opacity .35s ease}
.g-z{stroke-width:16;fill:none}
.g-green{stroke:var(--ok)} .g-amber{stroke:var(--warn)} .g-red{stroke:var(--stop)}
.g-tick{stroke:var(--muted);stroke-width:1} .g-tick.big{stroke-width:2}
.g-num{font:700 13px var(--f-body);fill:var(--muted)}
.g-unit{font:12px var(--f-body);fill:var(--muted)}
.g-needle{transform-box:view-box;transform-origin:120px 118px;transition:transform .45s cubic-bezier(.2,.8,.2,1)}
.g-needle line{stroke:var(--ink);stroke-width:4;stroke-linecap:round}
.g-needle circle{fill:var(--ink)}
.g-panel{min-width:0;display:grid;gap:.6rem}
.g-panel label{font-weight:700;font-size:.95rem}
.g-panel input[type=range]{padding:0;border:0;background:transparent;accent-color:var(--zc);width:100%}
.g-read{display:flex;align-items:center;gap:.75rem;flex-wrap:wrap}
.g-val{font:800 1.9rem/1 var(--f-head);font-variant-numeric:tabular-nums}
.g-pill{font-weight:700;font-size:.95rem;border-radius:99px;padding:.25rem .8rem;color:var(--ground);background:var(--zc)}
.g-for{margin:0;color:var(--muted);font-size:1rem}
.g-steps{margin:0;padding-left:1.2rem;display:grid;gap:.4rem}
.g-src{margin:0;font-size:.85rem;color:var(--muted)}
@media (prefers-reduced-motion:reduce){.g-needle,.g-zones,.key{transition:none}}
input#code::placeholder{text-transform:none;letter-spacing:0;font:400 1.1rem var(--f-body);color:var(--muted)}
[hidden]{display:none!important}
@media (min-width:960px){
  .hero{grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);align-items:start;gap:2.5rem}
  .hero h1{position:sticky;top:1.5rem;padding-top:1rem;font-size:3.6rem}
}
.readout{max-width:44rem}
.meter{gap:.9rem}
/* guides */
.guide-head{max-width:44rem}
small.by{display:block;font-size:.85rem;color:var(--muted);margin-top:.2rem}
ul.facts{margin:0;padding:0;list-style:none;display:grid;gap:.9rem;max-width:42rem}
ul.facts li{padding-left:1rem;border-left:4px solid var(--casing-edge)}
.card h3{font-size:1.15rem;margin:0 0 .3rem}
section > p{max-width:42rem}
.keys{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:760px){.keys{grid-template-columns:repeat(2,minmax(0,1fr))}.keys>.key:last-child:nth-child(odd){grid-column:1/-1}}
td.c .chip-lcd .seg{height:1.15rem}
@media (max-width:430px){.top nav{gap:.25rem .75rem}.top nav a{font-size:.93rem}}
td.c{min-width:5rem}
/* Hive lights */
.leds{display:inline-flex;gap:.35rem;align-items:center}
.led{width:1.05rem;height:1.05rem;border-radius:50%;display:inline-block;box-shadow:inset 0 -2px 3px rgba(0,0,0,.25),0 0 0 2px var(--casing-edge)}
.c-green{background:#2fbf5b}.c-blue{background:#2d7be0}.c-red{background:#e2342b}.c-amber{background:#f2a516}.c-pink{background:#f06bb4}.c-white{background:#f4f4f0}
.c-none{background:transparent;box-shadow:inset 0 0 0 2px var(--muted)}
.p-solid{box-shadow:inset 0 -2px 3px rgba(0,0,0,.25),0 0 6px 1px rgba(255,255,255,.0),0 0 0 2px var(--casing-edge)}
@media (prefers-reduced-motion:no-preference){
  .p-flash{animation:blink 1s steps(1) infinite}
  .p-double{animation:dbl 1.4s steps(1) infinite}
  .p-slow{animation:blink 2.4s ease-in-out infinite}
  .p-alt{animation:blink 1.2s steps(1) infinite}.p-alt+.p-alt{animation-delay:.6s}
}
@keyframes blink{50%{opacity:.15}}
@keyframes dbl{0%,20%,40%{opacity:1}10%,30%,100%{opacity:.15}}
.lights td:first-child{width:4.5rem;white-space:nowrap}
.mean{display:block;margin-top:.15rem}
.scrmsg{display:inline-block;font:800 .95rem var(--f-head);font-stretch:108%;background:var(--lcd);color:var(--lcd-ink);border-radius:6px;padding:.2rem .5rem;box-shadow:inset 0 1px 4px rgba(0,0,0,.25);white-space:nowrap}
@media (min-width:960px){.keys{grid-template-columns:repeat(5,minmax(0,1fr))}}
@media (min-width:761px) and (max-width:959px){.keys{grid-template-columns:repeat(2,minmax(0,1fr))}}
/* tools */
.tool{max-width:44rem}
.readout-tool{padding:.9rem 1.1rem 1rem;display:grid;gap:.4rem}
.readout-tool .scr-code .seg{height:clamp(3.6rem,15vw,5.5rem)}
.tool-form{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.75rem}
.tool-form .wide{grid-column:span 2}
@media (max-width:560px){.tool-form{grid-template-columns:repeat(2,minmax(0,1fr))}.tool-form .wide{grid-column:1/-1}}
.tool-form select,.tool-form input{font-size:1.05rem}
.working{background:var(--ground);border-radius:14px;padding:.8rem 1rem;font-size:1rem;display:grid;gap:.4rem}
.working p{margin:0}
.working ul.call{margin-top:.3rem}
/* positioning: routes, tool tiles, also-useful, guide groups, footer */
.hero-text{display:grid;gap:1rem;align-content:start}
.hero-text .lede{margin:0}
.routes{display:flex;flex-wrap:wrap;gap:.45rem}
.routes a{display:inline-flex;align-items:center;gap:.45rem;text-decoration:none;background:var(--casing);border-radius:99px;padding:.4rem .8rem .4rem .55rem;font-size:.95rem;box-shadow:inset 0 -2px 0 var(--casing-edge)}
.routes a span b{font-weight:700}
.routes a span{font-weight:400}
.routes svg{width:1.25rem;height:1.25rem;flex:none;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.routes a:hover{box-shadow:inset 0 0 0 2px var(--ink)}
@media (max-width:959px){.routes{flex-wrap:nowrap;overflow-x:auto;margin-inline:-16px;padding:0 16px .3rem;scrollbar-width:none}.routes::-webkit-scrollbar{display:none}.routes a{flex:none}.routes .more{display:none}}
@media (min-width:960px){
  .routes{flex-direction:column;flex-wrap:nowrap;gap:.5rem;margin-top:.5rem}
  .routes a{border-radius:14px;padding:.7rem .9rem;font-size:1.02rem;gap:.7rem}
  .routes svg{width:1.6rem;height:1.6rem}
  .hero h1{position:static}
}
.tooltiles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem}
@media (max-width:860px){.tooltiles{grid-template-columns:1fr}}
.tooltile{display:grid;gap:.8rem;text-decoration:none;background:var(--casing);border-radius:20px;padding:.9rem;box-shadow:inset 0 -4px 0 var(--casing-edge)}
@media (max-width:860px){.tooltile{grid-template-columns:8.5rem minmax(0,1fr);align-items:center}}
.tooltile:hover{box-shadow:inset 0 0 0 2px var(--ink)}
.tt-screen{display:flex;align-items:flex-end;gap:.4rem;padding:.6rem .7rem;border-radius:10px}
.tt-screen .seg{height:2.4rem;width:auto;max-width:100%}
.tt-screen small{font-weight:700;font-size:.85rem;color:var(--lcd-ink)}
.tt-text{display:grid;gap:.25rem;font-size:.98rem;color:var(--muted)}
.tt-text b{color:var(--ink);font:800 1.15rem/1.2 var(--f-head);font-stretch:106%}
.also{max-width:52rem}
.also h2{font-size:1.15rem}
.also-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(13rem,1fr));gap:.5rem}
.also-row a{display:flex;gap:.7rem;align-items:center;text-decoration:none;background:var(--casing);border-radius:14px;padding:.7rem .8rem}
.also-row a:hover{box-shadow:inset 0 0 0 2px var(--ink)}
.also-row svg{width:1.6rem;height:1.6rem;flex:none;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.also-row span{display:grid;font-size:.9rem;color:var(--muted);line-height:1.3}
.also-row b{color:var(--ink);font-size:1rem}
.also-row .chip-lcd{flex:none}
.guide-groups{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem}
@media (max-width:760px){.guide-groups{grid-template-columns:1fr}}
.ggroup h3{font-size:1.1rem;padding-bottom:.4rem;border-bottom:2px solid var(--ink);margin-bottom:.4rem}
.ggroup ul{list-style:none;margin:0;padding:0}
.ggroup li a{display:block;padding:.45rem 0;border-bottom:1px solid var(--line);text-decoration:none;font-weight:700}
.ggroup li a:hover{text-decoration:underline;text-decoration-color:var(--link-line)}
.foot-cols{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1.2rem}
@media (max-width:760px){.foot-cols{grid-template-columns:repeat(2,minmax(0,1fr))}}
.foot-cols h2{font-size:.95rem;margin:.2rem 0 .4rem;color:var(--ink)}
.foot-cols ul{display:grid;gap:.25rem}
.src-line{margin:-.4rem 0 0;font-size:.95rem;color:var(--muted)}
.src-line a{color:var(--muted)}
.toc ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.4rem}
.toc a{display:inline-block;text-decoration:none;font-weight:700;font-size:.95rem;background:var(--casing);border-radius:99px;padding:.3rem .8rem}
.toc a:hover{box-shadow:inset 0 0 0 2px var(--ink)}
.nb-tool{margin-top:1rem}
.guide-groups{grid-template-columns:repeat(auto-fit,minmax(14rem,1fr))}

/* text chips: lists of codes on topic pages */
.chips{display:flex;flex-wrap:wrap;gap:.45rem;margin:.6rem 0 1rem}
.chip{display:inline-block;background:var(--casing);border:1px solid var(--casing-edge);border-radius:999px;padding:.3rem .8rem;font-size:.95rem;text-decoration:none;font-weight:700}
.chip:hover{border-color:var(--ink)}
section h3{margin-top:1rem}
.fix{margin-top:.8rem;font-size:.92rem}
/* bund checker */
.checks{display:grid;gap:.9rem}
.checks .field{max-width:20rem}
.checks fieldset{border:0;margin:0;padding:0;display:grid;gap:.45rem}
.checks legend{font-weight:700;font-size:.95rem;margin-bottom:.4rem;padding:0}
label.check{display:grid;grid-template-columns:1.5rem minmax(0,1fr);gap:.6rem;align-items:start;background:var(--ground);border-radius:12px;padding:.65rem .8rem;cursor:pointer;font-size:1rem;line-height:1.4}
label.check input{width:1.25rem;height:1.25rem;margin:.1rem 0 0;accent-color:var(--ink)}
label.check:has(input:checked){box-shadow:inset 0 0 0 2px var(--ink)}
.cards .card p+p{margin-top:.5rem}
.cards div.card small.by{display:block;margin-top:.6rem}
/* guides hub */
.gsearch{display:grid;gap:.35rem;max-width:34rem}
.gsearch label{font-weight:700}
.gsearch input{font:inherit;font-size:1.1rem;padding:.8rem 1rem;border-radius:14px;border:2px solid var(--ink);background:var(--ground);color:var(--ink)}
.gsec h2{display:flex;align-items:center;gap:.55rem}
.gsec h2 svg{width:1.6rem;height:1.6rem;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
a.card{color:inherit;display:block}
a.card:hover{box-shadow:inset 0 0 0 2px var(--ink)}
/* v18: footer spacing, mobile menu as buttons */
.foot-cols ul+h2{margin-top:1rem}
@media (max-width:560px){
  .top{gap:.7rem}
  .top nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.4rem;width:100%}
  .top nav a{background:var(--casing);border-radius:12px;padding:.55rem .3rem;text-align:center;font-size:.92rem;border-bottom:0;box-shadow:inset 0 -2px 0 var(--casing-edge)}
}
@media (max-width:560px){
  .tooltiles{grid-template-columns:repeat(2,minmax(0,1fr));gap:.5rem}
  .tooltile{grid-template-columns:1fr;align-items:start;gap:.55rem;padding:.65rem}
  .tt-screen .seg{height:1.9rem}
  .tt-text{font-size:0}
  .tt-text b{font-size:1rem}
}