.boiler-page[data-astro-cid-gwpftt3u]{background:var(--paper)}.boiler-hero[data-astro-cid-gwpftt3u]{padding:clamp(74px,11vw,142px) 0 86px;background:linear-gradient(118deg,#14243ffa,#14243fc7),url(/images/Background_Images/hvac_tools_flat_lay_background.jpg) center / cover;color:var(--white)}.boiler-hero[data-astro-cid-gwpftt3u] h1[data-astro-cid-gwpftt3u]{max-width:780px;color:var(--white)!important;font-size:clamp(2.8rem,6vw,5.8rem);line-height:.98}.boiler-hero[data-astro-cid-gwpftt3u] .longform-kicker[data-astro-cid-gwpftt3u]{color:var(--heat-soft)}.boiler-hero[data-astro-cid-gwpftt3u] p[data-astro-cid-gwpftt3u]{max-width:730px;color:#ffffffd4;font-size:1.05rem;line-height:1.68}.boiler-hero[data-astro-cid-gwpftt3u] .boiler-hero-lede[data-astro-cid-gwpftt3u]{color:var(--white);font-size:clamp(1.12rem,1.8vw,1.32rem);line-height:1.58}.boiler-answer-card[data-astro-cid-gwpftt3u]{align-self:center;border-color:#ffffff38;background:#fffffff0}.boiler-answer-card[data-astro-cid-gwpftt3u] span[data-astro-cid-gwpftt3u],.boiler-compare-label[data-astro-cid-gwpftt3u]{color:var(--heat);font-size:.76rem;font-weight:900;letter-spacing:.1em;text-transform:uppercase}.boiler-answer-card[data-astro-cid-gwpftt3u] h2[data-astro-cid-gwpftt3u]{margin:12px 0;color:var(--ink);font-size:clamp(1.8rem,3vw,2.7rem);line-height:1.02}.boiler-answer-card[data-astro-cid-gwpftt3u] p[data-astro-cid-gwpftt3u]{margin:0;color:var(--muted);font-size:1rem}.boiler-intro-band[data-astro-cid-gwpftt3u],.boiler-call-section[data-astro-cid-gwpftt3u]{padding:clamp(64px,9vw,108px) 0;background:var(--night);color:var(--white)}.boiler-intro-grid[data-astro-cid-gwpftt3u],.boiler-call-grid[data-astro-cid-gwpftt3u],.boiler-decision-grid[data-astro-cid-gwpftt3u],.boiler-safety-grid[data-astro-cid-gwpftt3u],.boiler-emergency-grid[data-astro-cid-gwpftt3u]{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(30px,7vw,104px);align-items:start}.boiler-intro-grid[data-astro-cid-gwpftt3u] h2[data-astro-cid-gwpftt3u],.boiler-call-grid[data-astro-cid-gwpftt3u] h2[data-astro-cid-gwpftt3u],.boiler-decision-grid[data-astro-cid-gwpftt3u] h2[data-astro-cid-gwpftt3u],.boiler-safety-grid[data-astro-cid-gwpftt3u] h2[data-astro-cid-gwpftt3u],.boiler-emergency-grid[data-astro-cid-gwpftt3u] h2[data-astro-cid-gwpftt3u]{margin:0;color:var(--white);font-size:clamp(2.1rem,4.8vw,4.6rem);line-height:1.01}.boiler-intro-grid[data-astro-cid-gwpftt3u] .longform-kicker[data-astro-cid-gwpftt3u],.boiler-call-grid[data-astro-cid-gwpftt3u] .longform-kicker[data-astro-cid-gwpftt3u],.boiler-safety-grid[data-astro-cid-gwpftt3u] .longform-kicker[data-astro-cid-gwpftt3u],.boiler-emergency-grid[data-astro-cid-gwpftt3u] .longform-kicker[data-astro-cid-gwpftt3u]{color:var(--heat-soft)}.boiler-intro-grid[data-astro-cid-gwpftt3u] p[data-astro-cid-gwpftt3u],.boiler-call-grid[data-astro-cid-gwpftt3u]>div[data-astro-cid-gwpftt3u]>p[data-astro-cid-gwpftt3u],.boiler-decision-grid[data-astro-cid-gwpftt3u]>div[data-astro-cid-gwpftt3u]>p[data-astro-cid-gwpftt3u],.boiler-safety-grid[data-astro-cid-gwpftt3u]>div[data-astro-cid-gwpftt3u]>p[data-astro-cid-gwpftt3u],.boiler-emergency-grid[data-astro-cid-gwpftt3u]>div[data-astro-cid-gwpftt3u]>p[data-astro-cid-gwpftt3u]{color:#ffffffc7;line-height:1.68}.boiler-intro-grid[data-astro-cid-gwpftt3u] a[data-astro-cid-gwpftt3u],.boiler-call-grid[data-astro-cid-gwpftt3u] a[data-astro-cid-gwpftt3u],.boiler-decision-grid[data-astro-cid-gwpftt3u] a[data-astro-cid-gwpftt3u],.boiler-emergency-card[data-astro-cid-gwpftt3u] a[data-astro-cid-gwpftt3u]{color:var(--heat-soft);text-decoration:underline;text-underline-offset:3px}.boiler-module[data-astro-cid-gwpftt3u]{background:var(--paper)}.boiler-symptom-grid[data-astro-cid-gwpftt3u]{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.boiler-symptom-card[data-astro-cid-gwpftt3u]{min-width:0;min-height:225px;padding:24px;border:1px solid var(--line);border-radius:12px;background:var(--white);box-shadow:var(--shadow)}.boiler-symptom-card[data-astro-cid-gwpftt3u]>span[data-astro-cid-gwpftt3u],.boiler-step-card[data-astro-cid-gwpftt3u]>span[data-astro-cid-gwpftt3u]{color:var(--heat);font-size:.75rem;font-weight:900;letter-spacing:.1em;text-transform:uppercase}.boiler-symptom-card[data-astro-cid-gwpftt3u] h3[data-astro-cid-gwpftt3u],.boiler-step-card[data-astro-cid-gwpftt3u] h3[data-astro-cid-gwpftt3u],.boiler-call-card[data-astro-cid-gwpftt3u] h3[data-astro-cid-gwpftt3u],.boiler-compare-grid[data-astro-cid-gwpftt3u] h3[data-astro-cid-gwpftt3u]{margin:12px 0 10px;color:var(--ink);font-size:1.32rem;line-height:1.08}.boiler-symptom-card[data-astro-cid-gwpftt3u] p[data-astro-cid-gwpftt3u],.boiler-step-card[data-astro-cid-gwpftt3u] p[data-astro-cid-gwpftt3u],.boiler-compare-grid[data-astro-cid-gwpftt3u] p[data-astro-cid-gwpftt3u]{margin:0;color:var(--muted);line-height:1.62}.boiler-note[data-astro-cid-gwpftt3u],.boiler-source-note[data-astro-cid-gwpftt3u]{max-width:820px;margin:28px 0 0;color:var(--muted);line-height:1.68}.boiler-note[data-astro-cid-gwpftt3u]{padding-left:18px;border:1px solid var(--heat)}.boiler-safety-section[data-astro-cid-gwpftt3u]{padding:clamp(70px,9vw,112px) 0;background:var(--blue-soft)}.boiler-safety-grid[data-astro-cid-gwpftt3u] h2[data-astro-cid-gwpftt3u]{color:var(--ink)}.boiler-safety-grid[data-astro-cid-gwpftt3u]>div[data-astro-cid-gwpftt3u]>p[data-astro-cid-gwpftt3u]{color:var(--muted)}.boiler-safety-grid[data-astro-cid-gwpftt3u] .longform-kicker[data-astro-cid-gwpftt3u]{color:var(--heat)}.boiler-check-list[data-astro-cid-gwpftt3u]{display:grid;gap:10px}.boiler-check-list[data-astro-cid-gwpftt3u] article[data-astro-cid-gwpftt3u]{display:grid;grid-template-columns:54px 1fr;gap:16px;padding:20px;border:1px solid var(--line);border-radius:10px;background:var(--white);box-shadow:var(--shadow)}.boiler-check-list[data-astro-cid-gwpftt3u] article[data-astro-cid-gwpftt3u]>span[data-astro-cid-gwpftt3u],.boiler-step-card[data-astro-cid-gwpftt3u]>span[data-astro-cid-gwpftt3u]{color:var(--heat);font-size:1.2rem;font-weight:900}.boiler-check-list[data-astro-cid-gwpftt3u] h3[data-astro-cid-gwpftt3u]{margin:0 0 6px;color:var(--ink);font-size:1.1rem}.boiler-check-list[data-astro-cid-gwpftt3u] p[data-astro-cid-gwpftt3u]{margin:0;color:var(--muted);line-height:1.58}.boiler-vent-band[data-astro-cid-gwpftt3u]{padding:0 0 clamp(64px,8vw,100px);background:var(--blue-soft)}.boiler-vent-panel[data-astro-cid-gwpftt3u]{display:grid;grid-template-columns:minmax(0,.75fr) minmax(0,1.25fr);gap:34px;padding:clamp(28px,5vw,54px);border:1px solid var(--heat);background:var(--white);box-shadow:var(--shadow)}.boiler-vent-panel[data-astro-cid-gwpftt3u] h2[data-astro-cid-gwpftt3u]{margin:0;color:var(--ink);font-size:clamp(1.8rem,3vw,3rem);line-height:1.02}.boiler-vent-panel[data-astro-cid-gwpftt3u] .longform-kicker[data-astro-cid-gwpftt3u]{color:var(--heat)}.boiler-vent-panel[data-astro-cid-gwpftt3u] p[data-astro-cid-gwpftt3u]{margin:0;color:var(--muted);line-height:1.68}.boiler-vent-panel[data-astro-cid-gwpftt3u] a[data-astro-cid-gwpftt3u]{color:var(--heat);font-weight:800;text-decoration:underline;text-underline-offset:3px}.boiler-emergency-section[data-astro-cid-gwpftt3u]{padding:clamp(68px,9vw,112px) 0;background:var(--night);color:var(--white)}.boiler-emergency-card[data-astro-cid-gwpftt3u]{padding:28px;border:1px solid rgba(255,255,255,.18);border-radius:12px;background:#ffffff12}.boiler-emergency-card[data-astro-cid-gwpftt3u] strong[data-astro-cid-gwpftt3u]{color:var(--heat-soft);font-size:.78rem;letter-spacing:.1em;text-transform:uppercase}.boiler-emergency-card[data-astro-cid-gwpftt3u] p[data-astro-cid-gwpftt3u]{color:#ffffffd1!important}.boiler-step-grid[data-astro-cid-gwpftt3u]{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.boiler-step-card[data-astro-cid-gwpftt3u]{min-height:250px;padding:24px;border:1px solid var(--line);border-radius:10px;background:var(--white);box-shadow:var(--shadow)}.boiler-step-card[data-astro-cid-gwpftt3u] h3[data-astro-cid-gwpftt3u]{margin-top:24px}.boiler-source-note[data-astro-cid-gwpftt3u] a[data-astro-cid-gwpftt3u]{color:var(--heat);font-weight:800;text-decoration:underline;text-underline-offset:3px}.boiler-decision-section[data-astro-cid-gwpftt3u]{padding:clamp(68px,9vw,112px) 0;background:var(--blue-soft)}.boiler-decision-grid[data-astro-cid-gwpftt3u] h2[data-astro-cid-gwpftt3u]{color:var(--ink)}.boiler-decision-grid[data-astro-cid-gwpftt3u]>div[data-astro-cid-gwpftt3u]>p[data-astro-cid-gwpftt3u]{color:var(--muted)}.boiler-decision-grid[data-astro-cid-gwpftt3u] .longform-kicker[data-astro-cid-gwpftt3u]{color:var(--heat)}.boiler-compare-grid[data-astro-cid-gwpftt3u]{display:grid;gap:14px}.boiler-compare-grid[data-astro-cid-gwpftt3u] article[data-astro-cid-gwpftt3u]{padding:26px;border:1px solid var(--line);border-radius:12px;background:var(--white);box-shadow:var(--shadow)}.boiler-compare-grid[data-astro-cid-gwpftt3u] article[data-astro-cid-gwpftt3u]:last-child{border-color:#f64b1b6b}.boiler-compare-grid[data-astro-cid-gwpftt3u] h3[data-astro-cid-gwpftt3u]{font-size:1.55rem}.boiler-call-grid[data-astro-cid-gwpftt3u] h2[data-astro-cid-gwpftt3u]{color:var(--white)}.boiler-related-links[data-astro-cid-gwpftt3u]{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 18px;margin-top:28px}.boiler-related-links[data-astro-cid-gwpftt3u] a[data-astro-cid-gwpftt3u]{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.16);font-weight:800;text-decoration:none}.boiler-related-links[data-astro-cid-gwpftt3u] span[data-astro-cid-gwpftt3u]{margin-left:10px}.boiler-call-card[data-astro-cid-gwpftt3u]{padding:28px;border-radius:12px;background:var(--white);box-shadow:var(--shadow)}.boiler-call-card[data-astro-cid-gwpftt3u] ul[data-astro-cid-gwpftt3u]{display:grid;gap:11px;margin:0;padding-left:20px;color:var(--muted);line-height:1.55}.boiler-call-card[data-astro-cid-gwpftt3u] li[data-astro-cid-gwpftt3u]::marker{color:var(--heat)}.boiler-call-warning[data-astro-cid-gwpftt3u]{margin:24px 0 0;padding-top:18px;border-top:1px solid var(--line);color:var(--ink);font-weight:800;line-height:1.55}.boiler-faq[data-astro-cid-gwpftt3u]{background:var(--paper)}.boiler-faq[data-astro-cid-gwpftt3u] .longform-section-head[data-astro-cid-gwpftt3u]>p[data-astro-cid-gwpftt3u]{color:var(--muted)}.boiler-faq[data-astro-cid-gwpftt3u] .longform-faq-grid[data-astro-cid-gwpftt3u] article[data-astro-cid-gwpftt3u]{background:var(--white)}@media (max-width: 980px){.boiler-intro-grid[data-astro-cid-gwpftt3u],.boiler-call-grid[data-astro-cid-gwpftt3u],.boiler-decision-grid[data-astro-cid-gwpftt3u],.boiler-safety-grid[data-astro-cid-gwpftt3u],.boiler-emergency-grid[data-astro-cid-gwpftt3u],.boiler-vent-panel[data-astro-cid-gwpftt3u]{grid-template-columns:1fr}.boiler-symptom-grid[data-astro-cid-gwpftt3u],.boiler-step-grid[data-astro-cid-gwpftt3u]{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width: 640px){.boiler-hero[data-astro-cid-gwpftt3u]{padding-top:82px}.boiler-hero[data-astro-cid-gwpftt3u] h1[data-astro-cid-gwpftt3u]{font-size:clamp(2.5rem,13vw,4rem)}.boiler-symptom-grid[data-astro-cid-gwpftt3u],.boiler-step-grid[data-astro-cid-gwpftt3u],.boiler-related-links[data-astro-cid-gwpftt3u]{grid-template-columns:1fr}.boiler-symptom-card[data-astro-cid-gwpftt3u],.boiler-step-card[data-astro-cid-gwpftt3u]{min-height:auto}.boiler-hero[data-astro-cid-gwpftt3u] .longform-actions[data-astro-cid-gwpftt3u] a[data-astro-cid-gwpftt3u]{width:100%}}