:is(.calculator-page,.calculator-widget){--calc-bg:#fbfcfa;--calc-card:#fff;--calc-accent:#18594c;background:var(--calc-bg);color:var(--ink)}
html[data-theme=dark] :is(.calculator-page,.calculator-widget){--calc-bg:#0f1814;--calc-card:#17241e;--calc-accent:#a3d8ba}
:is(.calculator-page,.calculator-widget) *{box-sizing:border-box}.calculator-page a{color:var(--calc-accent);text-underline-offset:3px}:is(.calculator-page,.calculator-widget) button,:is(.calculator-page,.calculator-widget) input,:is(.calculator-page,.calculator-widget) select{font:inherit}
.calc-header{max-width:1160px;margin:auto;padding:20px 24px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line)}
.calc-brand{font-size:21px;font-weight:800;text-decoration:none;letter-spacing:-.6px}.calc-header nav{display:flex;align-items:center;gap:18px;font-size:14px}.calc-header nav a[aria-current=page]{font-weight:800;text-decoration-thickness:2px}
:is(.calculator-page,.calculator-widget) button{border:1px solid var(--line);background:var(--calc-card);color:var(--ink);border-radius:8px;padding:10px 14px;cursor:pointer;min-height:44px}:is(.calculator-page,.calculator-widget) button:hover{border-color:var(--calc-accent)}:is(.calculator-page,.calculator-widget) button:disabled{opacity:.55;cursor:default}
.calc-main{max-width:1100px;margin:0 auto;padding:36px 24px 64px}.calc-intro{max-width:800px;margin-bottom:24px}.calc-eyebrow{text-transform:uppercase;letter-spacing:.1em;font-size:12px;font-weight:700;color:var(--muted);margin:0 0 9px}.calc-intro h1{font-size:clamp(30px,4vw,44px);line-height:1.15;letter-spacing:-1.3px;margin:0 0 12px}.calc-intro>p:last-child{font-size:17px;line-height:1.55;margin:0;color:var(--muted)}
.calc-tool{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:var(--calc-card)}.calc-tool>h2{font-size:16px;letter-spacing:.01em;padding:16px 24px;margin:0;border-bottom:1px solid var(--line)}
.calc-form{display:grid;grid-template-columns:1fr 1fr}.calc-inputs{padding:24px}.calc-method label,.calc-field label{display:block;font-size:14px;font-weight:650;margin-bottom:7px;line-height:1.35}.calc-method-name{font-weight:650;margin:0 0 10px}.calc-method select,.calc-field input{width:100%;min-width:0;min-height:45px;border:1px solid var(--line);border-radius:8px;background:var(--calc-bg);color:var(--ink);padding:10px 12px}.calc-method select{white-space:normal;font-size:14px}.calc-field input{font-variant-numeric:tabular-nums;font-size:17px}.calc-field input[aria-invalid=true]{border-color:#b85236;outline:1px solid #b85236}
.calc-unit-note,.calc-method-note{font-size:12px;line-height:1.5;color:var(--muted);margin:13px 0}.calc-method-note{min-height:36px}.calc-fields{display:grid;grid-template-columns:1fr 1fr;gap:16px}.calc-field label{min-height:38px}.calc-actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:24px}.calc-actions button{font-size:13px;font-weight:650}.calc-copy-status{font-size:12px;color:var(--muted);min-height:18px;margin:10px 0 0}
.calc-result{padding:24px 28px;background:var(--green-soft);border-left:1px solid var(--line);min-width:0;overflow-wrap:anywhere}.calc-result-label{margin:0;font-size:14px;font-weight:700}.calc-result output{display:block;font-size:clamp(34px,4vw,52px);line-height:1.2;font-weight:750;letter-spacing:-1.5px;margin:8px 0;color:var(--calc-accent);font-variant-numeric:tabular-nums}.calc-result-note{font-size:13px;color:var(--muted);margin:0 0 18px}.calc-formula{font-size:13px;line-height:1.6;border-top:1px solid var(--line);padding-top:14px;margin:16px 0}.calc-trail-heading{font-size:12px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin:22px 0 10px}.calc-trail{list-style:none;padding:0;margin:0}.calc-trail li{display:grid;grid-template-columns:1fr auto;gap:3px 15px;border-bottom:1px solid var(--line);padding:9px 0;font-size:13px}.calc-trail strong{font-variant-numeric:tabular-nums}.calc-trail small{grid-column:1/-1;color:var(--muted);font-size:12px}.calc-error,.calc-warnings p{font-size:13px;line-height:1.5}.calc-error:empty{display:none}.calc-error{font-weight:650}.calc-warnings p{border-left:3px solid var(--orange);padding-left:10px;margin:16px 0 0}.calc-loading{padding:24px;min-height:250px}
.calc-cta{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:16px 18px;margin:16px 0 36px;background:var(--green-soft);border:1px solid var(--line);border-left:3px solid var(--calc-accent,var(--green));border-radius:8px}.article-main .calc-cta{max-width:800px}.article-main [data-calculator="wc"]{margin-top:0}.calc-cta p{margin:0;font-size:14px;line-height:1.5;max-width:650px}.calc-cta a{font-size:14px;white-space:nowrap;font-weight:750}.calc-article{max-width:760px;margin:0 auto}.calc-article h2{font-size:25px;line-height:1.3;letter-spacing:-.4px;margin:42px 0 16px}.calc-article h3{font-size:18px;line-height:1.4;margin:27px 0 10px}.calc-article p,.calc-article li{font-size:16px;line-height:1.8;margin:0 0 16px}.calc-equation{font-variant-numeric:tabular-nums;padding:20px;border:1px solid var(--line);border-radius:10px;background:var(--surface);overflow-wrap:anywhere}.calc-article .calc-source{font-size:13px;color:var(--muted)}.calc-faq section{border-bottom:1px solid var(--line);padding-bottom:3px}.calc-faq p{font-size:15px}.calc-related{margin-top:48px;border-top:1px solid var(--line);padding-top:20px}.calc-related h2{font-size:22px;margin:0 0 16px}.calc-related-links{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.calc-related-links a{display:flex;align-items:center;justify-content:space-between;border:1px solid var(--line);background:var(--calc-card);border-radius:9px;padding:18px;text-decoration:none;font-size:15px;font-weight:650;gap:10px}.calc-final{background:var(--green-soft);border:1px solid var(--line);border-radius:14px;padding:32px;margin-top:32px;max-width:none}.calc-final h2{font-size:27px;line-height:1.25;margin:0 0 12px}.calc-final p{font-size:16px;line-height:1.65;max-width:700px;margin:0 0 20px}.calc-final a{display:inline-block;background:#18594c;color:#fff;text-decoration:none;font-size:14px;font-weight:700;padding:13px 18px;border-radius:8px}.calc-footer{border-top:1px solid var(--line);max-width:1100px;margin:auto;padding:24px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;color:var(--muted);font-size:13px}.calc-footer nav{display:flex;gap:18px}:is(.calculator-page,.calculator-widget) :focus-visible{outline:3px solid var(--calc-accent);outline-offset:3px}.calc-skip{position:absolute;left:12px;top:-100px;background:var(--calc-card);padding:12px;z-index:10}.calc-skip:focus{top:8px}
@media(max-width:700px){.calc-header{padding:15px 18px;gap:12px;flex-wrap:wrap}.calc-header nav{gap:13px;font-size:13px}.calc-header nav button{font-size:12px;padding:8px 10px}.calc-header .calc-header-model{display:none}.calc-main{padding:26px 16px 40px}.calc-intro h1{letter-spacing:-.8px}.calc-intro>p:last-child{font-size:15px}.calc-form{grid-template-columns:1fr}.calc-inputs{padding:18px}.calc-result{border-left:0;border-top:1px solid var(--line);padding:22px}.calc-tool>h2{padding:15px 18px}.calc-fields{gap:14px 12px}.calc-field label{font-size:13px;min-height:35px}.calc-field input{font-size:16px}.calc-cta{display:block;margin-bottom:25px}.calc-cta a{display:inline-block;margin-top:12px}.calc-article h2{font-size:23px}.calc-related-links{grid-template-columns:1fr}.calc-final{padding:24px}.calc-final h2{font-size:24px}.calc-footer{padding:22px 16px}}
@media(max-width:360px){.calc-header nav{gap:10px}.calc-fields{grid-template-columns:1fr}.calc-field label{min-height:0}}
.calc-secondary{border:1px solid var(--line);border-radius:8px;padding:14px;margin:18px 0}.calc-secondary[hidden]{display:none}.calc-secondary span{display:block;font-size:13px;font-weight:650}.calc-secondary strong{display:block;font-size:32px;line-height:1.25;margin-top:5px;font-variant-numeric:tabular-nums;color:var(--calc-accent)}
/* Reuse the calculator inside the established guide; scope all guide overrides. */
.article-main .wc-calculator{padding:0;background:var(--calc-card);overflow:hidden}.article-main .wc-calculator>h2{font-size:1.6rem;margin:0;padding:22px 24px;border-bottom:1px solid var(--line)}
.wc-calculator .calc-fields{grid-template-columns:1fr}.wc-calculator .calc-field label{min-height:0}.wc-calculator .calc-field input{margin-top:0;background:var(--calc-bg);border-color:var(--line)}
.wc-calculator .calc-result-label{margin:0}.wc-calculator .calc-trail-heading{margin:22px 0 10px}.wc-calculator .calc-unit-note,.wc-calculator .calc-method-note{font-size:12px;line-height:1.5;margin:13px 0}.wc-calculator .calc-result-note{font-size:13px;line-height:1.5;margin:0 0 18px}.wc-calculator .calc-copy-status{font-size:12px;line-height:1.5;margin:10px 0 0}.wc-calculator .calc-formula{font-size:13px;line-height:1.6;margin:16px 0}.wc-calculator .calc-error,.wc-calculator .calc-warnings p{font-size:13px;line-height:1.5}.wc-calculator .calc-trail li{line-height:1.5}
@media(max-width:700px){.article-main .wc-calculator>h2{padding:18px}.wc-calculator .calc-result output{font-size:38px}}