:root{--ink:#173332;--ink-soft:#516665;--forest:#143f3d;--forest-deep:#0d302f;--orange:#e9683c;--orange-dark:#c94e27;--sand:#f3efe5;--cream:#fbfaf6;--line:#d9ded8;--white:#fff;--shadow:0 24px 70px #0f302f1f}*{box-sizing:border-box}html{scroll-behavior:smooth}body{color:var(--ink);background:var(--cream);margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.5}a{color:inherit}button,input,select{font:inherit}.prototype-note{color:#dfecea;background:var(--forest-deep);letter-spacing:.12em;text-transform:uppercase;justify-content:space-between;gap:20px;min-height:34px;padding:7px clamp(20px,5vw,76px);font-size:11px;display:flex}.prototype-note strong{color:#ffb69a;font-weight:600}.site-header{grid-template-columns:1fr auto 1fr;align-items:center;gap:36px;width:min(1440px,100% - 64px);min-height:86px;margin:0 auto;display:grid}.brand,.footer-brand{align-items:center;gap:12px;text-decoration:none;display:inline-flex}.brand-sign{width:42px;height:42px;color:var(--white);background:var(--orange);border-radius:50% 50% 50% 12px;place-items:center;font-family:Georgia,Times New Roman,serif;font-size:23px;line-height:1;display:inline-grid}.brand strong,.footer-brand strong{letter-spacing:-.02em;font-size:17px;display:block}.brand small,.footer-brand small{color:#71817f;letter-spacing:.16em;text-transform:uppercase;font-size:9px;display:block}.primary-nav{gap:34px;display:flex}.primary-nav a{color:#38504f;font-size:14px;font-weight:600;text-decoration:none;position:relative}.primary-nav a:after{content:"";background:var(--orange);height:2px;transition:transform .18s;position:absolute;bottom:-7px;left:0;right:0;transform:scaleX(0)}.primary-nav a:hover:after,.primary-nav a[aria-current=page]:after{transform:scaleX(1)}.language-button{border:1px solid var(--line);min-width:126px;color:var(--ink);cursor:pointer;background:0 0;border-radius:12px;grid-template-columns:auto 1fr auto;justify-self:end;align-items:center;gap:8px;padding:9px 13px;display:grid}.language-button span:first-child{font-weight:800}.language-button small{color:#7b8a88;font-size:10px}.hero{z-index:2;min-height:520px;color:var(--white);background:linear-gradient(112deg,#143f3dfa 0%,#143f3df5 58%,#0e3433f5 100%),radial-gradient(circle at 10% 20%,#4f817c,#0000 45%);grid-template-columns:minmax(0,1fr);align-items:center;padding:76px max(32px,50vw - 656px) 78px;display:grid;position:relative;overflow:visible}.hero:before{content:"";pointer-events:none;border:1px solid #ffffff17;border-radius:50%;width:530px;height:530px;position:absolute;top:-190px;left:50%;box-shadow:0 0 0 76px #ffffff05,0 0 0 152px #ffffff05}.hero-copy{z-index:1;max-width:1040px;position:relative}.eyebrow{color:var(--orange);letter-spacing:.17em;text-transform:uppercase;margin:0 0 16px;font-size:12px;font-weight:800}.hero .eyebrow{color:#ffb399}.hero h1{letter-spacing:-.065em;max-width:940px;margin:0;font-size:clamp(46px,5.5vw,78px);font-weight:500;line-height:.98}.hero h1 em{color:#f7c9a3;letter-spacing:-.04em;font-family:Georgia,Times New Roman,serif;font-style:normal;font-weight:400}.hero-lead{color:#d9e6e3;max-width:760px;margin:28px 0 32px;font-size:clamp(17px,1.7vw,21px)}.material-search{background:var(--white);border-radius:15px;grid-template-columns:auto 1fr;align-items:center;gap:14px;max-width:800px;min-height:64px;padding:7px 22px;display:grid;box-shadow:0 18px 50px #0000002e}.site-search{z-index:5;max-width:800px;position:relative}.site-search .material-search{max-width:none}.search-results{max-height:min(520px,65vh);color:var(--ink);background:#fffffffa;border:1px solid #d8dfdc;border-radius:16px;padding:12px;position:absolute;top:calc(100% + 10px);left:0;right:0;overflow-y:auto;box-shadow:0 25px 70px #0000003d}.search-results-head{justify-content:space-between;align-items:center;gap:20px;min-height:34px;padding:2px 5px 9px 8px;display:flex}.search-results-head strong{color:#667775;letter-spacing:.06em;text-transform:uppercase;font-size:11px}.search-results-head button{color:#667775;cursor:pointer;background:#eef1ed;border:0;border-radius:50%;width:28px;height:28px;padding:0;font-size:20px;line-height:1}.search-results ul{margin:0;padding:0;list-style:none}.search-results li+li{border-top:1px solid #e8ebe7}.search-results li a{border-radius:10px;gap:3px;padding:13px 11px;text-decoration:none;display:grid}.search-results li a:hover,.search-results li a:focus-visible,.search-results li a.active{background:#f3f5f0;outline:0}.search-all-results{color:var(--white);background:var(--forest);border-radius:10px;justify-content:space-between;align-items:center;gap:18px;margin-top:9px;padding:14px 12px;font-size:11px;font-weight:800;text-decoration:none;display:flex}.search-all-results:after{color:#ffad8d;content:"→";font-size:16px}.site-search-page{max-width:none}.site-search-page .material-search{border:1px solid var(--line);max-width:900px;box-shadow:0 16px 50px #143f3d1a}.site-search-page .search-results{border-color:var(--line);max-height:none;box-shadow:none;margin-top:20px;padding:20px;position:static}.site-search-page .search-results-head{min-height:42px}[data-search-pagination]:not([hidden]){flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;margin-top:20px;display:flex}[data-search-pagination] button{border:1px solid var(--line);color:var(--forest);background:var(--white);font:inherit;cursor:pointer;border-radius:6px;padding:10px 14px}[data-search-pagination] button:disabled{opacity:.5;cursor:default}[data-calculator-error]{color:var(--orange-dark)}.site-search-page .search-results li a{padding:18px 12px}.site-search-page .search-results li strong{font-size:17px}.search-results li span{color:var(--orange-dark);letter-spacing:.08em;text-transform:uppercase;font-size:9px;font-weight:800}.search-results li strong{font-size:14px}.search-results li small{color:#71817e;-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:11px;display:-webkit-box;overflow:hidden}.search-icon{border:2px solid #607270;border-radius:50%;width:17px;height:17px;position:relative}.search-icon:after{content:"";background:#607270;width:7px;height:2px;position:absolute;bottom:-4px;right:-5px;transform:rotate(45deg)}.material-search input{min-width:0;color:var(--ink);background:0 0;border:0;outline:0;font-size:16px}.material-search input::placeholder{color:#899694}.popular-links{color:#b6cac7;flex-wrap:wrap;gap:8px 16px;margin-top:17px;font-size:12px;display:flex}.popular-links a{color:#fff;text-underline-offset:4px}.calculator-card{color:var(--ink);box-shadow:var(--shadow);background:#fffffff5;border:1px solid #ffffffb3;border-radius:24px;padding:30px}.calculator-heading{justify-content:space-between;align-items:flex-start;gap:20px;display:flex}.calculator-heading p,.calculator-heading h2{margin:0}.calculator-heading p{color:#84918f;letter-spacing:.12em;text-transform:uppercase;font-size:11px;font-weight:700}.calculator-heading h2,.calculator-heading h3{letter-spacing:-.035em;margin-top:4px;font-size:24px}.calculator-heading h3{margin-bottom:0}.formula-badge{color:#a43d1c;white-space:nowrap;background:#fff0e9;border-radius:8px;padding:7px 10px;font-family:Georgia,serif;font-size:13px}.calculator-options{grid-template-columns:1fr 1fr;gap:12px;margin-top:26px;display:grid}.calculator-option-wide,.calculator-field-wide{grid-column:1/-1}.calculator-fields{grid-template-columns:1fr 1fr;gap:12px;margin:18px 0;display:grid}.calculator-options label>span:first-child,.calculator-fields label>span:first-child{color:#667775;margin:0 0 7px 2px;font-size:12px;font-weight:700;display:block}.select-shell,.input-shell{background:#fcfcf9;border:1px solid #d6dcda;border-radius:11px;align-items:center;height:54px;padding:0 13px;display:flex}.select-shell:focus-within,.input-shell:focus-within{border-color:#58807c;box-shadow:0 0 0 3px #27645f1a}.select-shell select{width:100%;min-width:0;color:var(--ink);background:0 0;border:0;outline:0;font-size:14px;font-weight:700}.input-shell input{width:100%;min-width:0;color:var(--ink);background:0 0;border:0;outline:0;font-size:17px;font-weight:800}.input-shell b{color:#7b8987;white-space:nowrap;font-size:11px}.calculator-result{color:#d7e6e3;background:var(--forest);border-radius:14px;justify-content:space-between;align-items:center;gap:18px;padding:21px 22px;display:flex}.calculator-result span{font-size:12px}.calculator-result strong{color:var(--white);letter-spacing:-.04em;white-space:nowrap;font-size:30px}.calculator-result small{font-size:13px}.calculator-result-grid{grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch;gap:0;display:grid}.calculator-result-grid>div{border-left:1px solid #ffffff24;min-width:0;padding:2px 16px}.calculator-result-grid>div:first-child{border-left:0;padding-left:0}.calculator-result-grid>div:last-child{padding-right:0}.calculator-result-grid span,.calculator-result-grid strong,.calculator-result-grid>div>small{display:block}.calculator-result-grid strong{overflow-wrap:anywhere;white-space:normal;margin-top:7px;font-size:22px}.calculator-result-grid>div>small{color:#9fc0bb;margin-top:5px;font-size:11px}.calculator-caption{color:#8a9795;margin:14px 0 0;font-size:10px}.trust-strip{z-index:1;border-bottom:1px solid var(--line);grid-template-columns:repeat(4,1fr);align-items:center;gap:34px;width:min(1312px,100% - 64px);min-height:100px;margin:-1px auto 0;display:grid;position:relative}.search-page-main{background:var(--sand);min-height:calc(100vh - 235px);padding:82px max(32px,50vw - 550px) 110px}.search-page-heading{margin-bottom:34px}.search-page-heading h1{letter-spacing:-.06em;max-width:800px;margin:0;font-size:clamp(38px,5vw,62px);line-height:1.04}.search-page-heading p:not(.eyebrow){max-width:650px;color:var(--ink-soft);margin:18px 0 0;font-size:14px}.calculator-directory-main{background:var(--cream)}.calculator-directory-heading{margin-bottom:64px}.calculator-directory-heading p:not(.eyebrow){font-size:16px}.calculator-directory-summary{border-bottom:1px solid var(--line);justify-content:space-between;align-items:baseline;gap:24px;padding-bottom:18px;display:flex}.calculator-directory-summary h2{letter-spacing:-.025em;margin:0;font-size:19px}.calculator-directory-summary strong{color:var(--orange);letter-spacing:-.04em;font-size:28px}.calculator-directory-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:24px;display:grid}.calculator-directory-card{border:1px solid var(--line);min-height:330px;color:var(--ink);background:#fff;border-radius:18px;flex-direction:column;padding:30px;text-decoration:none;transition:border-color .18s,box-shadow .18s,transform .18s;display:flex}.calculator-directory-card:hover{border-color:#afbbb8;transform:translateY(-3px);box-shadow:0 20px 55px #143f3d17}.calculator-directory-card-head{justify-content:space-between;align-items:center;gap:18px;display:flex}.calculator-directory-index{color:var(--orange);font-size:13px;font-weight:800}.calculator-directory-tag{color:#617370;background:#edf1ed;border-radius:7px;padding:5px 8px;font-size:12px;font-weight:700}.calculator-directory-card>p{color:var(--orange-dark);letter-spacing:.08em;text-transform:uppercase;margin:42px 0 7px;font-size:13px;font-weight:800}.calculator-directory-card h2,.calculator-directory-card h3{letter-spacing:-.045em;max-width:470px;margin:0;font-size:clamp(23px,3vw,31px);line-height:1.12}.calculator-directory-description{max-width:500px;color:var(--ink-soft);margin-top:16px;font-size:14px;line-height:1.65}.calculator-directory-action{margin-top:auto;padding-top:28px;font-size:14px;font-weight:800}.calculator-directory-action b{color:var(--orange);margin-left:7px}.home-calculator-grid .calculator-directory-card{min-height:290px}.home-calculators-link{color:var(--ink);margin-top:24px;font-size:14px;font-weight:800;text-decoration:none;display:inline-block}.home-calculators-link span{color:var(--orange);margin-left:7px}.trust-strip div{align-items:baseline;gap:8px;display:flex}.trust-strip strong{color:var(--orange);letter-spacing:-.04em;font-size:27px}.trust-strip span,.trust-strip p{color:var(--ink-soft);font-size:11px}.content-section,.method-section{width:min(1312px,100% - 64px);margin:0 auto;padding:100px 0}.section-heading{justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:34px;display:flex}.section-heading h2,.method-copy h2{letter-spacing:-.055em;margin:0;font-size:clamp(32px,4vw,50px);line-height:1.08}.section-link,.method-copy a{color:var(--ink);font-size:13px;font-weight:800;text-decoration:none}.section-link span,.method-copy a span{color:var(--orange);margin-left:7px}.section-description{max-width:390px;color:var(--ink-soft);margin:0;font-size:14px}.category-grid{grid-template-columns:repeat(4,1fr);gap:14px;display:grid}.category-card{border:1px solid var(--line);background:#fff;border-radius:15px;grid-template-rows:1fr auto;grid-template-columns:50px 1fr auto;align-items:center;gap:8px 15px;min-height:135px;padding:22px;text-decoration:none;transition:border-color .18s,box-shadow .18s,transform .18s;display:grid;position:relative;overflow:hidden}.category-card:hover{border-color:#afbbb8;transform:translateY(-3px);box-shadow:0 18px 44px #143f3d17}.category-mark{width:50px;height:50px;color:var(--forest);background:#dcebe5;border-radius:12px;grid-row:1/3;place-items:center;font-family:Georgia,Times New Roman,serif;font-size:17px;display:grid}.category-card:nth-child(3n+2) .category-mark{color:#93411f;background:#fae4d7}.category-card:nth-child(3n) .category-mark{color:#63521d;background:#efe9ca}.category-copy strong,.category-copy small{display:block}.category-copy strong{font-size:15px}.category-copy small{color:#7b8987;margin-top:5px;font-size:11px}.category-count{color:#73827f;background:#f1f3ef;border-radius:6px;padding:4px 7px;font-size:10px;font-weight:800}.category-arrow{color:var(--orange);grid-column:3;font-size:17px}.guides{background:var(--sand);width:100%;padding-left:max(32px,50vw - 656px);padding-right:max(32px,50vw - 656px)}.guide-grid,.material-topic-grid{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}.material-topic-card{background:#ffffff9e;border:1px solid #dbd6c9;border-radius:18px;flex-direction:column;min-height:390px;padding:28px;display:flex}.material-topic-card-featured{color:var(--white);border-color:var(--forest);background:var(--forest)}.material-topic-head{justify-content:space-between;align-items:center;display:flex}.material-topic-head>span{color:#93411f;background:#fae4d7;border-radius:13px;place-items:center;width:50px;height:50px;font-family:Georgia,Times New Roman,serif;font-size:16px;display:grid}.material-topic-card-featured .material-topic-head>span{color:#ffb399;background:#ffffff1a}.material-topic-head small{color:#979d96;letter-spacing:.12em;font-size:10px;font-weight:800}.material-topic-card h3{letter-spacing:-.05em;margin:42px 0 12px;font-size:30px}.material-topic-card>p{color:#697976;margin:0;font-size:12px}.material-topic-card-featured>p{color:#b9cdca}.material-topic-card nav{margin-top:auto;padding-top:28px;display:grid}.material-topic-card nav a{border-top:1px solid #6778743d;justify-content:space-between;gap:20px;padding:11px 0;font-size:11px;font-weight:800;text-decoration:none;display:flex}.material-topic-card-featured nav a{border-top-color:#ffffff24}.material-topic-card nav a span{color:var(--orange)}.tools-section{border-bottom:1px solid var(--line)}.tools-layout{grid-template-columns:minmax(520px,.95fr) minmax(0,1.05fr);align-items:stretch;gap:clamp(30px,6vw,86px);display:grid}.tools-layout .calculator-card{border-color:#d9dfdc;height:100%;box-shadow:0 20px 60px #143f3d17}.tool-links>p{color:#7a8986;letter-spacing:.13em;text-transform:uppercase;margin:0 0 10px;font-size:10px;font-weight:800}.tool-links>a{border-top:1px solid var(--line);grid-template-columns:42px 1fr auto;align-items:start;gap:18px;min-height:126px;padding:22px 0;text-decoration:none;display:grid}.tool-links>a:last-child{border-bottom:1px solid var(--line)}.tool-links>a>span{color:var(--orange);font-size:10px;font-weight:800}.tool-links strong,.tool-links small{display:block}.tool-links strong{letter-spacing:-.025em;font-size:17px}.tool-links small{color:#71817e;-webkit-line-clamp:2;-webkit-box-orient:vertical;margin-top:7px;font-size:11px;display:-webkit-box;overflow:hidden}.tool-links>a>b{color:var(--orange);font-weight:500}.recent-grid{grid-template-columns:repeat(3,1fr);gap:14px;display:grid}.recent-grid article{border:1px solid var(--line);background:#fff;border-radius:15px;flex-direction:column;min-height:245px;padding:24px;display:flex}.recent-grid article>span{color:var(--orange-dark);letter-spacing:.09em;text-transform:uppercase;font-size:9px;font-weight:800}.recent-grid h3{letter-spacing:-.03em;margin:24px 0 10px;font-size:17px;line-height:1.28}.recent-grid h3 a,.recent-grid article>a{text-decoration:none}.recent-grid p{color:#71817e;-webkit-line-clamp:3;-webkit-box-orient:vertical;margin:0;font-size:11px;display:-webkit-box;overflow:hidden}.recent-grid article>a{color:var(--orange);align-self:flex-end;margin-top:auto;font-size:18px}.guide-card{background:#ffffff94;border:1px solid #dbd6c9;border-radius:18px;flex-direction:column;min-height:355px;padding:27px;display:flex}.guide-card-featured{color:var(--white);background:var(--forest);border-color:var(--forest)}.guide-number{color:#9a9f97;letter-spacing:.12em;align-self:flex-end;font-size:11px;font-weight:800}.guide-card-featured .guide-number{color:#8eaaa6}.guide-value{margin:42px 0 20px}.guide-value strong{color:var(--orange);letter-spacing:-.04em;font-family:Georgia,Times New Roman,serif;font-size:clamp(29px,3vw,42px);font-weight:400;line-height:1;display:block}.guide-value span{color:#7a8885;font-size:11px}.guide-card-featured .guide-value span{color:#a9bfbc}.guide-card h3{letter-spacing:-.035em;margin:0 0 10px;font-size:20px}.guide-card h3 a,.guide-link{text-decoration:none}.guide-card>p:not(.guide-value){color:#687875;margin:0;font-size:12px}.guide-card-featured>p:not(.guide-value){color:#b9cdca}.guide-link{color:inherit;margin-top:auto;padding-top:22px;font-size:12px;font-weight:800}.guide-link span{color:var(--orange);margin-left:6px}.method-section{grid-template-columns:.85fr 1.15fr;gap:clamp(70px,10vw,150px);display:grid}.method-copy>p:not(.eyebrow){max-width:520px;color:var(--ink-soft);margin:28px 0;font-size:14px}.method-points{border-top:1px solid var(--line)}.method-points article{border-bottom:1px solid var(--line);grid-template-columns:48px 1fr;gap:16px;padding:24px 0;display:grid}.method-points article>span{color:var(--orange);font-size:11px;font-weight:800}.method-points strong{margin-bottom:5px;font-size:15px;display:block}.method-points p{color:var(--ink-soft);margin:0;font-size:12px}.site-footer{color:#bfd0cd;background:var(--forest-deep);grid-template-columns:1fr auto 1fr;align-items:center;gap:30px;min-height:145px;padding:36px max(32px,50vw - 656px);display:grid}.site-footer .brand-sign{width:38px;height:38px;font-size:20px}.site-footer strong{color:var(--white)}.site-footer small{color:#829d99}.site-footer>p{margin:0;font-size:11px}.site-footer nav{flex-wrap:wrap;justify-self:end;gap:22px;display:flex}.site-footer nav a{color:#bfd0cd;font-size:11px;text-decoration:none}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (width<=1200px){.category-grid{grid-template-columns:repeat(3,1fr)}}@media (width<=1050px){.site-header{grid-template-columns:1fr auto}.primary-nav{display:none}.calculator-card{max-width:620px}.trust-strip{grid-template-columns:repeat(4,1fr);padding:24px 0}.trust-strip div,.trust-strip span{display:block}.category-grid,.guide-grid,.material-topic-grid,.recent-grid{grid-template-columns:repeat(2,1fr)}.guide-card:last-child{grid-column:1/-1;min-height:300px}.material-topic-card:last-child{grid-column:1/-1}.tools-layout{grid-template-columns:1fr}}@media (width<=720px){.prototype-note{display:none}.site-header{width:calc(100% - 36px);min-height:72px}.brand small,.language-button small{display:none}.language-button{min-width:72px}.hero{min-height:auto;padding:58px 18px}.hero:before{aspect-ratio:1;width:min(82vw,420px);height:auto;top:-110px;left:auto;right:0}.hero h1{font-size:clamp(42px,13vw,59px)}.material-search{grid-template-columns:auto 1fr;padding-left:17px}.site-search:not(.site-search-page) .search-results{max-height:min(52dvh,420px);position:absolute;top:calc(100% + 10px);left:0;right:0}.calculator-card{padding:22px}.calculator-options,.calculator-fields,.calculator-result-grid{grid-template-columns:1fr}.calculator-option-wide,.calculator-field-wide{grid-column:auto}.calculator-result{flex-direction:column;align-items:flex-start}.calculator-result-grid>div,.calculator-result-grid>div:first-child,.calculator-result-grid>div:last-child{border-top:1px solid #ffffff24;border-left:0;width:100%;padding:14px 0}.calculator-result-grid>div:first-child{border-top:0;padding-top:0}.calculator-result-grid>div:last-child{padding-bottom:0}.trust-strip,.content-section,.method-section{width:calc(100% - 36px)}.trust-strip{grid-template-columns:repeat(2,1fr);gap:12px}.trust-strip strong{font-size:22px}.content-section,.method-section{padding:70px 0}.section-heading{flex-direction:column;align-items:flex-start}.category-grid,.guide-grid,.material-topic-grid,.recent-grid,.method-section{grid-template-columns:1fr}.guides{width:100%;padding-left:18px;padding-right:18px}.guide-card:last-child,.material-topic-card:last-child{grid-column:auto}.method-section{gap:50px}.site-footer{grid-template-columns:1fr;justify-items:start;padding:38px 18px}.site-footer nav{justify-self:start}.search-page-main{padding:58px 18px 80px}.calculator-directory-heading{margin-bottom:44px}.calculator-directory-grid{grid-template-columns:1fr}.calculator-directory-card{min-height:300px;padding:24px}.site-search-page .search-results{padding:12px}}