@layer base,layout,components,responsive;
@layer base{
:root{--paper:#faf8f2;--ink:#243e32;--muted:#62685d;--green:#244c3d;--line:#dcded2;--terra:#a95e40;--sage:#edf0e7;--white:#fffefa;font-family:Arial,"Segoe UI",Tahoma,sans-serif;color:var(--ink);background:var(--paper);font-size:16px;line-height:1.65;color-scheme:light}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-underline-offset:4px}a:hover{text-decoration-thickness:2px}button,input,select{font:inherit}button,select{cursor:pointer}button{color:inherit}button,a,input,select{touch-action:manipulation}input,select{min-width:0}h1,h2,h3,p{margin-block:0 1rem}h1,h2{font-family:Georgia,"Times New Roman",serif;font-weight:400;line-height:1.14;letter-spacing:-.035em}h1{font-size:clamp(2.6rem,5.2vw,4.7rem)}h2{font-size:clamp(2rem,3vw,2.8rem)}h3{font-size:1.12rem;line-height:1.35}svg{max-width:100%}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #a95e40;outline-offset:4px}::selection{background:#d8e2c8}[hidden]{display:none!important}html{scroll-padding-top:2rem}.muted,small{color:var(--muted)}.skip{position:absolute;inset-inline-start:1rem;top:-100px;background:white;padding:1rem;z-index:10}.skip:focus{top:1rem}input,select{border:1px solid #b4b9ac;border-radius:6px;background:var(--white);color:var(--ink);padding:.85rem;width:100%;min-height:50px}label{display:block;font-weight:600;margin-bottom:.5rem}button{min-height:44px}html[dir=rtl] h1,html[dir=rtl] h2{font-family:Tahoma,Arial,sans-serif;letter-spacing:0;line-height:1.5}html[lang=hi] h1,html[lang=hi] h2{letter-spacing:0;line-height:1.45}
}
@layer layout{
.site-header,main,footer,.promise,.language-notice{width:min(1180px,calc(100% - 64px));margin-inline:auto}.site-header{display:flex;align-items:center;gap:2rem;min-height:104px;border-bottom:1px solid var(--line)}.site-header nav{display:flex;gap:2rem;margin-inline-start:auto}.site-header nav a{text-decoration:none;font-size:.9rem}.language{display:flex;align-items:center;gap:.5rem;font-size:.8rem;font-weight:400;margin:0}.language select{width:auto;max-width:140px;min-height:42px;font-size:.85rem;padding:.45rem;background:transparent}.hero{display:grid;grid-template-columns:1.15fr 1fr;align-items:center;gap:2rem;padding:64px 0 38px}.hero h1{font-size:clamp(2.6rem,4.2vw,3.8rem)}.hero .lede{max-width:510px;margin-block:1.7rem}.hero-art{position:relative}.worktable{width:100%;height:auto;display:block}.art-caption{display:block;text-align:center;font-size:.65rem;letter-spacing:.23em;color:var(--muted)}.search-panel{border:1px solid var(--line);background:var(--white);padding:26px 32px;border-radius:10px;display:grid;grid-template-columns:.7fr 1.5fr;gap:0 30px;align-items:center}.search-panel label{margin:0;font-size:1.03rem}.search-panel [role=status]{grid-column:2;margin:.35rem 0 0;font-size:.75rem;color:var(--muted)}.collection{padding-top:70px}.section-head{display:flex;justify-content:space-between;gap:2rem;align-items:end}.section-head>p{max-width:350px;font-size:.95rem;color:var(--muted)}.category-filters{display:flex;gap:.6rem;flex-wrap:wrap;margin:20px 0}.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:25px}.learn-feature{display:grid;grid-template-columns:.85fr 1fr;gap:60px;align-items:center;padding:70px 0}.promise{padding:36px 0;display:flex;gap:28px;align-items:center;border-block:1px solid var(--line)}.promise h2{font-size:1.8rem;margin-bottom:.5rem}.promise p{margin:0}.promise>span{font-size:3rem;color:var(--terra)}footer{padding:40px 0 28px;display:grid;grid-template-columns:1fr 1fr;column-gap:30px;font-size:.85rem}footer .brand{font-size:1.5rem}footer .tagline{grid-column:1/-1;max-width:500px;margin-top:15px}footer small{grid-column:1/-1}.page-heading{max-width:780px;padding:50px 0 30px}.page-heading h1{font-size:clamp(2.6rem,5vw,4rem)}.reading{max-width:780px;margin-inline:auto}.method{padding:50px 0}.reading h2{font-size:1.8rem;margin-top:2rem}.reading p{line-height:1.85}.article{padding:35px 0 60px}.article h1{margin:24px 0}.library{padding-bottom:60px}.library article{border-block:1px solid var(--line);padding-block:24px}.calculator{display:grid;grid-template-columns:1.1fr 1fr;border:1px solid var(--line);border-radius:12px;background:var(--white);overflow:hidden}.calculator form{padding:32px}.result-box{background:var(--sage);padding:40px;display:flex;flex-direction:column;justify-content:center}.unit-row{display:grid;grid-template-columns:1fr 44px 1fr;gap:12px;align-items:end;margin:25px 0}.unit-row button{border:1px solid var(--line);border-radius:50%;background:var(--paper);width:44px;height:44px;font-size:1.3rem;margin-bottom:3px}.calculator .button{width:100%}.result-box output{font-family:Georgia,serif;font-size:clamp(2rem,4vw,3.5rem);line-height:1.3;overflow-wrap:anywhere;margin-bottom:24px}.breadcrumb{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;font-size:.85rem}.language-notice{background:var(--sage);padding:20px 25px;border-radius:8px;margin-top:18px}.language-links{display:flex;flex-wrap:wrap;gap:22px}.language-notice p{margin:0 0 .6rem}
}
@layer components{
fieldset{border:0;padding:0;margin:0;min-width:0}fieldset[disabled]{opacity:.7}.calculator-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.calculator-field{min-width:0}.calculator-field label{font-size:.9rem}.calculator-actions{display:flex;align-items:center;gap:20px}.calculator-actions .button{flex:1}.calculation-results{margin:0}.calculation-results>div{padding:14px 0;border-bottom:1px solid #d4dbc9}.calculation-results dt{font-size:.8rem;color:var(--muted)}.calculation-results dd{margin:4px 0 0;font-size:1.35rem;font-weight:600;overflow-wrap:anywhere}.formula,.worked-example{background:var(--sage);padding:20px;border-radius:6px;overflow-wrap:anywhere;line-height:1.9}.formula-legend{display:flex;flex-wrap:wrap;gap:12px 25px}.formula-legend>div{display:flex;gap:8px}.formula-legend dt{font-weight:700}.formula-legend dd{margin:0}.footer-info{display:flex;gap:24px;grid-column:1/-1;margin:0 0 20px}.footer-info a{padding-block:8px;min-height:44px}.launch-learning{padding:35px 0 60px}.launch-learning p{max-width:700px;color:var(--muted)}@media(max-width:440px){.calculator-fields{grid-template-columns:1fr}.calculator-actions{flex-wrap:wrap}.calculator-actions .button{flex-basis:100%}}
.footer-contact p{font-size:.85rem;color:var(--muted);margin:0;max-width:650px}.enquiry-section{padding:8px 0 42px}.enquiry-section>h2,.contact-channels>h2{font-size:2rem;margin-bottom:24px}.enquiry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.enquiry-card{min-width:0;padding:28px;border:1px solid var(--line);border-radius:8px;background:var(--white);display:flex;flex-direction:column}.enquiry-card:first-child{background:var(--sage)}.enquiry-card h3{font-size:1.2rem}.enquiry-card p{font-size:.95rem;color:var(--muted)}.enquiry-card a{min-height:44px;display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;font-weight:600;font-size:.9rem}.enquiry-card .eyebrow{margin-bottom:16px}.contact-channels{padding-top:12px}@media(max-width:800px){.enquiry-grid{grid-template-columns:1fr}.enquiry-card{padding:24px}.enquiry-section>h2,.contact-channels>h2{font-size:1.8rem}}
/* Reservations are separate from controls. Never clip or overlay live ad creatives. */
.ad-placement{position:static;clear:both;width:100%;min-width:0;max-width:970px;margin:48px auto;padding-block:18px;border-block:1px solid var(--line);text-align:center;break-inside:avoid}.ad-placement-label{font-size:.65rem;font-weight:400;letter-spacing:.1em;color:var(--muted);margin:0 0 12px}.ad-placement-frame{display:grid;place-items:center;width:100%;min-width:0;min-height:100px;background:#f1f1eb}.ad-placeholder{font-size:.78rem;color:var(--muted);padding:18px;overflow-wrap:anywhere}.ad-placement--rectangle{max-width:780px}.ad-placement--rectangle .ad-placement-frame{min-height:250px}.ad-placement a:focus-visible{outline:3px solid var(--terra)}@media(min-width:768px){.ad-placement--banner .ad-placement-frame{min-height:90px}}@media print{.ad-placement{display:none!important}}
.footer-contact{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:10px 26px;margin:5px 0 20px}.footer-contact a{display:inline-flex;align-items:center;min-height:44px;overflow-wrap:anywhere;max-width:100%}.footer-contact a:first-child{font-weight:700}.contact-heading{max-width:820px}.contact-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin:10px 0 48px}.contact-card{min-width:0;background:var(--white);border:1px solid var(--line);border-radius:10px;padding:32px;display:flex;flex-direction:column;align-items:start}.contact-card h2{font-size:2rem;margin:18px 0 14px}.contact-card p{color:var(--muted)}.contact-symbol{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:var(--sage);font:1.8rem Georgia,serif}.contact-email{display:inline-block;overflow-wrap:anywhere;max-width:100%;font-weight:600;min-height:44px;padding:8px 0}.contact-phone{font-size:1.2rem}.contact-card small{display:block;margin-top:12px}.contact-guidance{padding-bottom:60px}.contact-guidance h2{margin-top:0}.contact-guidance p{margin-bottom:22px}@media(max-width:680px){.contact-grid{grid-template-columns:1fr;gap:18px;margin-bottom:32px}.contact-card{padding:24px}.contact-card h2{font-size:1.8rem}.footer-contact{display:grid;gap:6px}.footer-contact a{display:block;padding:8px 0}}
.tool-card{position:relative}.tool-card .card-link::after{content:"";position:absolute;inset:0;border-radius:8px}.tool-card:has(.card-link:hover){border-color:var(--green);box-shadow:0 3px 12px #244c3d14}.tool-card:has(.card-link:focus-visible){outline:3px solid var(--terra);outline-offset:3px}.search-input input{flex:1;width:0}.search-submit{flex-shrink:0;background:var(--green);color:white;border:0;border-radius:4px;padding:8px 12px;font-size:.85rem}.search-results{grid-column:1/-1;list-style:none;margin:14px 0 0;padding:0;border-top:1px solid var(--line)}.search-results a{display:block;min-height:44px;padding:10px 4px;border-bottom:1px solid var(--line);font-size:.9rem}.planned-details{margin-top:28px}.planned-details details{border-block-end:1px solid var(--line);padding:16px 8px;scroll-margin-top:20px}.planned-details summary{cursor:pointer;min-height:44px;padding:8px 0;font-weight:600}.planned-details details[open]{background:var(--sage);padding:20px}.planned-details h3{margin-top:14px}
.brand{direction:ltr;unicode-bidi:isolate}
.brand{display:flex;align-items:center;white-space:nowrap;gap:0;font-family:Georgia,serif;font-size:1.9rem;font-weight:600;letter-spacing:-.055em;text-decoration:none}.brand>span:not(.brand-mark){font-weight:400;color:var(--terra)}.brand-mark{display:block;width:36px;height:36px;flex:none;margin-inline-end:9px}.brand small{font-family:Arial,sans-serif;font-size:.56rem;letter-spacing:.04em;margin-inline-start:10px;border:1px solid var(--line);padding:2px 5px;border-radius:3px}.eyebrow{font-family:Arial,Tahoma,sans-serif;font-size:.68rem;letter-spacing:.16em;font-weight:600;color:var(--muted);margin-bottom:20px}.little-line{width:24px;display:inline-block;border-top:1px solid var(--terra);vertical-align:middle;margin-inline-end:12px}.lede{font-size:1.08rem;line-height:1.8;color:var(--muted)}.button{display:inline-flex;justify-content:space-between;align-items:center;gap:25px;padding:13px 22px;background:var(--green);color:#fffdf6;border:1px solid var(--green);border-radius:5px;text-decoration:none;font-size:.93rem;font-weight:600;min-height:50px}.button:hover{background:#183d2f}.hero-foot{font-size:.77rem;margin-top:16px;color:var(--muted)}.hero-foot span{margin-inline-end:6px}.search-input{display:flex;align-items:center;border:1px solid var(--line);background:var(--paper);border-radius:6px;padding-inline:14px;gap:10px}.search-input input{border:0;background:transparent;min-height:50px;padding-inline:4px}.search-input>span{font-size:1.8rem}.search-input kbd{font-size:.8rem;color:var(--muted);border:1px solid var(--line);padding:0 7px}.chip{border:1px solid var(--line);border-radius:5px;background:transparent;padding:7px 12px;font-size:.8rem}.chip.active{background:var(--green);color:white;border-color:var(--green)}.collection>.muted{font-size:.8rem}.tool-card{background:var(--white);border:1px solid var(--line);padding:25px 23px 20px;border-radius:8px;display:flex;flex-direction:column;min-height:280px}.tool-card.available{background:#f0f3eb;border-color:#a8b99f}.card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px;gap:10px}.category-icon{display:block;width:43px;height:43px;color:#63765e}.status{font-size:.64rem;color:var(--muted);background:#f1efe7;border:1px solid #e5e4d8;padding:3px 8px;border-radius:4px}.status.ready{background:#e2e9dc;color:#244c3d;border-color:#c7d4bd}.tool-card p{font-size:.84rem;color:var(--muted);margin-bottom:22px;line-height:1.75}.card-link,.card-planned{display:flex;justify-content:space-between;gap:10px;font-size:.82rem;border-top:1px solid var(--line);padding-top:14px;margin-top:auto}.card-link{text-decoration:none;font-weight:600}.card-planned{color:var(--muted)}.guide-art{background:#e7e9df;border-radius:8px;padding:30px;min-height:255px;display:grid;place-items:center}.paper{background:#faf6e9;width:90%;max-width:300px;box-shadow:5px 6px 0 #d8d9cb;padding:20px;transform:rotate(-5deg);color:#82765a}.paper span{font-size:.55rem;letter-spacing:.16em}.paper svg{display:block}.paper i{display:block;font-family:Georgia,serif;text-align:center;font-size:1.1rem}.text-link{font-weight:600;font-size:1rem}.learn-feature p{color:var(--muted)}.note{padding:20px 24px;background:var(--sage);border-inline-start:3px solid #809475;margin:25px 0}.note p:last-child{margin-bottom:0}.field-help{font-size:.78rem;color:var(--muted);margin-top:8px}.error{color:#a33124;font-size:.9rem}.text-button{background:transparent;border:0;padding:5px 0;text-decoration:underline}.result-box small{font-size:.77rem}
}
@layer responsive{
@media(min-width:1450px){.hero{padding-block:80px}.hero-art{padding-inline-start:25px}}
@media(max-width:1000px){.site-header{gap:1rem;flex-wrap:wrap;padding-block:20px}.site-header nav{gap:1rem}.language{margin-inline-start:auto}.hero{gap:0}.tool-grid{grid-template-columns:repeat(2,1fr)}.hero h1{font-size:3.3rem}.brand{font-size:1.65rem}.search-panel{grid-template-columns:1fr;gap:10px}.search-panel [role=status]{grid-column:1}}
@media(max-width:680px){.site-header,main,footer,.promise,.language-notice{width:calc(100% - 36px)}.site-header{min-height:90px;gap:12px}.site-header nav{order:3;width:100%;justify-content:space-between;margin-top:5px}.site-header nav a{font-size:.8rem}.language{font-size:0;gap:0}.language select{font-size:.85rem;max-width:114px}.hero{grid-template-columns:1fr;padding:38px 0 28px}.hero h1{font-size:2.7rem}.hero .lede{margin-block:20px}.hero-art{max-width:360px;width:100%;margin-inline:auto;margin-top:22px}.worktable{max-height:255px}.art-caption{font-size:.58rem}.hero .eyebrow{font-size:.6rem}.search-panel{padding:20px}.search-input{padding-inline:9px}.search-input input{font-size:.88rem}.collection{padding-top:40px}.section-head{display:block}.section-head>p{max-width:none}.section-head .eyebrow{margin-bottom:10px}.tool-grid{grid-template-columns:1fr}.tool-card{min-height:240px}.category-filters{gap:8px}.chip{padding:8px 10px}.learn-feature{grid-template-columns:1fr;gap:28px;padding:45px 0}.guide-art{min-height:220px}.promise{gap:17px;align-items:start}.promise h2{font-size:1.5rem}.promise p{font-size:.86rem}footer{grid-template-columns:1fr}footer .brand{margin-bottom:15px}.calculator{grid-template-columns:1fr}.calculator form,.result-box{padding:24px}.unit-row{gap:8px;grid-template-columns:1fr 44px 1fr}.unit-row select{font-size:.8rem;padding:10px 6px}.page-heading{padding-top:30px}.page-heading h1{font-size:2.65rem}.article h1{font-size:2.6rem}.reading h2{font-size:1.7rem}.eyebrow{letter-spacing:.1em}.language-links{gap:15px}.language-notice{padding:18px}html[dir=rtl] .hero h1{font-size:2.35rem}}
@media(prefers-reduced-motion:no-preference){a,button{transition:background-color .15s ease}}
@media print{.site-header,.language-notice,.promise,footer,.hero-art,.category-filters{display:none}body{background:white}main{width:100%}.calculator{break-inside:avoid}a{color:black}.button{background:white;color:black}.result-box{background:#eee}}
}