/* BoilerCodes: one reading column; each answer styled like the boiler's own display. */
:root{
  --bg:#eef2f4; --surface:#ffffff; --ink:#15212b; --muted:#56656f; --line:#d3dce1;
  --accent:#1d6fb8; --accent-ink:#ffffff;
  --lcd-bg:#0f2230; --lcd-fg:#7fe0ff; --lcd-glow:rgba(127,224,255,.35); --lcd-text:#dbe9f1; --lcd-label:#8aa4b3;
  --ok:#1e7b4c; --ok-bg:#e3f3ea; --warn:#9a5b00; --warn-bg:#fdf0d8; --stop:#b3261e; --stop-bg:#fbe6e4; --gas-ink:#ffffff;
  --gauge-track:#d9e1e6; --gauge-band:#4caf7d;
  --f-display:"Barlow Condensed","Arial Narrow",Arial,sans-serif;
  --f-body:"Source Sans 3","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --f-lcd:"Share Tech Mono",Consolas,"Courier New",monospace;
  --r:10px;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){:root{
  --bg:#0c151c; --surface:#14212b; --ink:#e6eef3; --muted:#9aaab4; --line:#26353f;
  --accent:#5aa9ec; --accent-ink:#06121b;
  --lcd-bg:#061520; --lcd-fg:#8fe6ff; --lcd-glow:rgba(143,230,255,.3);
  --ok:#6fd39f; --ok-bg:#12301f; --warn:#f2b54a; --warn-bg:#33260c; --stop:#ff8a80; --stop-bg:#3a1714; --gas-ink:#1a0503;
  --gauge-track:#2a3a45; --gauge-band:#3f9d6c; color-scheme:dark}}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--ink);font:400 1.0625rem/1.6 var(--f-body);margin:0}
a{color:var(--accent)}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
img,svg{max-width:100%}

.gas{background:var(--stop);color:var(--gas-ink);font-weight:600;font-size:.95rem;padding:.55rem 16px;text-align:center}
.gas strong{font-family:var(--f-lcd);font-weight:400;letter-spacing:.04em;white-space:nowrap}

.wrap{max-width:46rem;margin:0 auto;padding-inline:16px;padding-block:1.25rem 3rem;display:grid;gap:1.75rem}
.top{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}
.brandmark{font-family:var(--f-display);font-weight:700;font-size:1.6rem;text-transform:uppercase;color:var(--ink);text-decoration:none;letter-spacing:.01em}
.brandmark span{color:var(--accent)}
.top nav{display:flex;gap:1.1rem;flex-wrap:wrap}
.top nav a{color:var(--ink);text-decoration:none;font-weight:600}
.top nav a:hover{color:var(--accent)}
.crumbs{font-size:.9rem;color:var(--muted)}
.crumbs a{color:var(--muted)}

h1{font-family:var(--f-display);font-weight:600;font-size:clamp(2rem,6vw,2.7rem);line-height:1.08;margin:0;text-wrap:balance}
h2{font-family:var(--f-display);font-weight:600;font-size:1.4rem;margin:0 0 .5rem;letter-spacing:.01em;text-wrap:balance}
.lede{color:var(--muted);margin:.6rem 0 0;max-width:40rem;font-size:1.1rem}
.prose p{max-width:40rem}
section > p{margin:.4rem 0;max-width:42rem}

.finder{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:1.25rem;display:grid;gap:1rem}
.row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
@media (max-width:520px){.row{grid-template-columns:1fr}}
label{display:block;font-size:.8rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);margin-bottom:.35rem}
select,input{width:100%;font:inherit;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:.6rem .75rem}
input#code{font-family:var(--f-lcd);font-size:1.25rem;letter-spacing:.06em;text-transform:uppercase}
.hint{font-size:.9rem;color:var(--muted);margin:0}
.chips{display:flex;flex-wrap:wrap;gap:.5rem}
.chip{font:400 .95rem var(--f-lcd);letter-spacing:.04em;color:var(--ink);border:1px solid var(--line);border-radius:6px;padding:.3rem .6rem;text-decoration:none;background:var(--surface)}
.chip:hover{border-color:var(--accent);color:var(--accent)}
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);font:700 1rem var(--f-body);text-decoration:none;border:0;border-radius:8px;padding:.7rem 1.1rem;cursor:pointer;justify-self:start}

.answer{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.lcd{background:var(--lcd-bg);padding:1.25rem;display:flex;gap:1.25rem;align-items:center;flex-wrap:wrap}
.lcd .code{font-family:var(--f-lcd);color:var(--lcd-fg);font-size:clamp(3rem,12vw,4.5rem);line-height:1;text-shadow:0 0 14px var(--lcd-glow);letter-spacing:.05em}
.lcd .meaning{min-width:0;flex:1 1 14rem;color:var(--lcd-text)}
.lcd .meaning small{display:block;font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;color:var(--lcd-label)}
.lcd .meaning h1{font-family:var(--f-body);font-size:1.25rem;font-weight:600;line-height:1.35;color:var(--lcd-text);margin-top:.2rem}
.body{padding:1.25rem;display:grid;gap:1.4rem}
.verdict{display:inline-flex;align-items:center;gap:.5rem;font-weight:700;border-radius:99px;padding:.35rem .9rem;font-size:.95rem;justify-self:start}
.verdict::before{content:"";width:.6rem;height:.6rem;border-radius:50%;background:currentColor}
.v-ok{color:var(--ok);background:var(--ok-bg)} .v-warn{color:var(--warn);background:var(--warn-bg)} .v-stop{color:var(--stop);background:var(--stop-bg)}
.plain{margin:0;max-width:40rem}
ol{margin:0;padding-left:1.4rem;display:grid;gap:.45rem}
ul.call{margin:0;padding-left:1.2rem;display:grid;gap:.35rem}
.none{margin:0;color:var(--muted)}
.cta{display:flex;flex-wrap:wrap;gap:.75rem;align-items:center}
.cta small{color:var(--muted)}

.gauge{display:grid;grid-template-columns:minmax(0,13rem) 1fr;gap:1rem;align-items:center;border:1px dashed var(--line);border-radius:var(--r);padding:1rem;background:var(--surface)}
@media (max-width:520px){.gauge{grid-template-columns:1fr}}
.gauge svg{width:100%;max-width:13rem;height:auto}
.g-track{stroke:var(--gauge-track);stroke-width:12;fill:none;stroke-linecap:round}
.g-band{stroke:var(--gauge-band);stroke-width:12;fill:none}
.g-needle{stroke:var(--ink);stroke-width:3;stroke-linecap:round}
.g-hub{fill:var(--ink)}
.tick{font:13px var(--f-lcd);fill:var(--muted)}
.gauge input[type=range]{padding:0;border:0;background:transparent;accent-color:var(--accent)}
.gauge output{font-family:var(--f-lcd);font-size:1.4rem}
.gauge p{margin:.4rem 0 0}

.faq details{border-bottom:1px solid var(--line);padding:.7rem 0}
.faq summary{cursor:pointer;font-weight:600}
.faq details p{margin:.5rem 0 0;max-width:40rem}

.table{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:.97rem}
th,td{text-align:left;padding:.6rem .8rem;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:.75rem;letter-spacing:.07em;text-transform:uppercase;color:var(--muted)}
td.c{font-family:var(--f-lcd);white-space:nowrap;font-variant-numeric:tabular-nums}
tr:last-child td{border-bottom:0}
.dot{display:inline-block;width:.55rem;height:.55rem;border-radius:50%;margin-right:.35rem;vertical-align:.05rem}
.d-ok{background:var(--ok)} .d-warn{background:var(--warn)} .d-stop{background:var(--stop)}

.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));gap:1rem}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:1rem 1.1rem;text-decoration:none;color:var(--ink)}
.card:hover{border-color:var(--accent)}
.card p{margin:0;color:var(--muted)}
.note ul.soon{display:flex;flex-wrap:wrap;gap:.4rem 1.2rem;padding-left:1.1rem;margin:.3rem 0 0}
.src{font-size:.9rem;color:var(--muted)}
.src h2{font-size:1.1rem}
.src ul{margin:0;padding-left:1.1rem}
footer{font-size:.88rem;color:var(--muted);border-top:1px solid var(--line);padding-top:1rem}
footer p{margin:.3rem 0}
footer a{color:var(--muted)}
.applies{font-size:.9rem;color:var(--muted);margin:0}
.wrap>*{min-width:0}
.brandcards{grid-template-columns:repeat(auto-fit,minmax(9.5rem,1fr))}.brandcards .card h2{font-size:1.2rem;margin:0}
/* brand-aware pressure gauge */
.gauge2{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:1rem;display:grid;gap:1rem;
  --zc:var(--gauge-band)}
.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:600 .9rem var(--f-body);color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:99px;padding:.35rem .8rem;cursor:pointer;transition:background .2s,border-color .2s,color .2s}
.g-brands button:hover{border-color:var(--accent)}
.g-brands button[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.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(--gauge-track);stroke-width:16;fill:none}
.g-zones{transition:opacity .35s ease}
.g-z{stroke-width:16;fill:none}
.g-green{stroke:var(--gauge-band)} .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:13px var(--f-lcd);fill:var(--muted)}
.g-unit{font:11px 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(--zc);stroke-width:4;stroke-linecap:round;transition:stroke .3s}
.g-needle circle{fill:var(--zc);transition:fill .3s}
.g-panel{min-width:0;display:grid;gap:.6rem}
.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-family:var(--f-lcd);font-size:1.8rem;line-height:1;font-variant-numeric:tabular-nums}
.g-pill{font-weight:700;font-size:.9rem;border-radius:99px;padding:.3rem .8rem;color:var(--zc);background:var(--bg);border:2px solid var(--zc);transition:color .3s,border-color .3s}
.g-for{margin:0;color:var(--muted);font-size:.95rem}
.g-steps{margin:0;padding-left:1.2rem;display:grid;gap:.4rem}
.g-src{margin:0;font-size:.82rem;color:var(--muted)}
@media (prefers-reduced-motion:reduce){.g-needle,.g-zones,.g-needle line,.g-needle circle{transition:none}}
/* type-ahead suggestions */
.sugwrap{position:relative;min-width:0}
.sug{position:absolute;left:0;right:0;top:100%;z-index:5;margin:.25rem 0 0;padding:.25rem;list-style:none;background:var(--surface);border:1px solid var(--line);border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,.12);max-height:22rem;overflow:auto}
.sug li a{display:flex;gap:.75rem;align-items:baseline;padding:.5rem .6rem;border-radius:6px;text-decoration:none;color:var(--ink)}
.sug li a b{font-family:var(--f-lcd);font-weight:400;min-width:4.5rem;color:var(--accent)}
.sug li a span{min-width:0;font-size:.95rem}
.sug li a em{font-style:normal;font-size:.75rem;color:var(--warn);background:var(--warn-bg);border-radius:99px;padding:.05rem .45rem;margin-left:.3rem;white-space:nowrap}
.sug li.on a,.sug li a:hover{background:var(--bg)}
.filter{display:grid;gap:.35rem}
.filter input{max-width:24rem}