:root{--navy-950:#06152f;--navy-900:#081d40;--navy-800:#0b2b5d;--navy-700:#17447f;--blue-700:#0756d9;--blue-600:#0b67e8;--blue-500:#2d83f7;--blue-300:#8cc4ff;--blue-100:#eaf4ff;--cyan-500:#1bbfd0;--cyan-100:#e6fbfd;--ink:#081a38;--ink-2:#263b5d;--muted:#6b7a92;--line:#dce7f3;--surface:#fff;--soft:#f5f9fd;--soft-blue:#eef6ff;--success:#0c9b78;--radius-sm:12px;--radius:20px;--radius-lg:30px;--shadow-sm:0 10px 30px #081d4014;--shadow:0 22px 70px #081d4021;--shell:1180px}*,:before,:after{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{margin:0}button,input,textarea,select{font:inherit}h1,h2,h3,p{margin-top:0}.calculator-page{background:#fff}.calculator-hero{background:radial-gradient(circle at 90% 15%,#2d83f729,#0000 32%),linear-gradient(#fff,#f5faff);padding:44px 0 22px}.calculator-hero__grid{align-items:center;gap:24px;display:grid}.calculator-hero h1{letter-spacing:-.055em;max-width:13ch;margin:13px 0 16px;font-size:clamp(40px,11vw,68px);line-height:1.02}.calculator-hero img{filter:drop-shadow(0 22px 25px #092b5d14);width:min(100%,470px);margin-inline:auto}.calculator-workspace{background:linear-gradient(#f5faff,#eef6ff);padding:26px 0 34px}.calculator-layout{gap:16px;display:grid}.calculator-card,.result-card{background:#fff;border:1px solid #d9e8f8;border-radius:24px;box-shadow:0 20px 60px #081d4014}.calculator-card{padding:20px}.calculator-toolbar{gap:12px;margin-bottom:18px;display:grid}.calculator-toolbar label,.measure-field{color:var(--ink-2);gap:7px;font-size:12px;font-weight:850;display:grid}.calculator-toolbar select,.measure-field input{border:1px solid var(--line);width:100%;min-height:48px;color:var(--ink);font:inherit;background:#fff;border-radius:12px;padding:10px 12px}.calculator-toolbar select:focus,.measure-field input:focus{border-color:var(--blue-500);outline:3px solid #0b67e824}.calculator-fields{gap:12px;display:grid}.measure-field div{border:1px solid var(--line);background:#fff;border-radius:12px;grid-template-columns:1fr auto;align-items:center;display:grid;overflow:hidden}.measure-field input{border:0;border-radius:0;min-width:0}.measure-field b{color:var(--blue-700);padding:0 13px;font-size:12px}.calculator-actions{grid-template-columns:1fr;gap:9px;margin-top:18px;display:grid}.calculator-actions button{cursor:pointer;font:inherit;border:0}.calculator-error{color:#b42318;min-height:24px;margin:10px 0 0;font-size:13px;font-weight:700}.result-card{background:linear-gradient(145deg,var(--navy-950),#0d4d9c 78%,#0b67e8);color:#fff;padding:23px;position:relative;overflow:hidden}.result-card:after{content:"";border:30px solid #ffffff0e;border-radius:50%;width:220px;height:220px;position:absolute;top:-110px;right:-100px}.result-card>*{z-index:1;position:relative}.result-primary{align-items:baseline;gap:8px;margin:23px 0 20px;display:flex}.result-primary strong{letter-spacing:-.05em;font-size:clamp(48px,15vw,76px);line-height:.9}.result-primary span{color:#b9d7ff;font-weight:800}.result-secondary{grid-template-columns:1fr 1fr;gap:10px;display:grid}.result-secondary>div{background:#ffffff17;border:1px solid #ffffff1a;border-radius:14px;padding:13px}.result-secondary strong,.result-secondary span{display:block}.result-secondary strong{font-size:20px}.result-secondary span{color:#b9d7ff;font-size:10px}.result-formula{background:#00000029;border-radius:14px;margin-top:18px;padding:14px}.result-formula span,.result-formula code{display:block}.result-formula span{color:#a8c8ef;text-transform:uppercase;letter-spacing:.1em;font-size:10px}.result-formula code{color:#9eeaf0;margin-top:5px;font-family:inherit;font-size:16px;font-weight:850}.result-card p{color:#c9d9f0;margin:18px 0 0;font-size:12px}.shape-help-grid{gap:11px;display:grid}.shape-help-grid article{border:1px solid var(--line);background:#fff;border-radius:18px;padding:19px;position:relative;box-shadow:0 8px 24px #081d400a}.shape-help-grid h3{margin:0 0 7px;font-size:18px;position:relative}.shape-help-grid p{color:var(--muted);margin:0;font-size:13px;position:relative}.calculator-method{background:#f5faff}.method-panel{background:#fff;border:1px solid #d9e8f8;border-radius:24px;gap:20px;padding:24px;display:grid}.method-panel h2{letter-spacing:-.045em;margin:8px 0;font-size:clamp(28px,8vw,45px);line-height:1.08}.method-panel ol{counter-reset:steps;gap:12px;margin:0;padding:0;list-style:none;display:grid}.method-panel li{border:1px solid var(--line);color:var(--ink-2);border-radius:14px;padding:14px 14px 14px 52px;position:relative}.method-panel li:before{counter-increment:steps;content:counter(steps);background:var(--blue-100);width:28px;height:28px;color:var(--blue-700);border-radius:50%;place-items:center;font-weight:900;display:grid;position:absolute;top:11px;left:13px}@media (width>=560px){.calculator-toolbar{grid-template-columns:1.3fr .7fr}.calculator-fields{grid-template-columns:repeat(3,1fr)}.calculator-actions{grid-template-columns:1fr auto}.shape-help-grid{grid-template-columns:repeat(2,1fr)}}@media (width>=800px){.calculator-hero__grid{grid-template-columns:1fr .8fr}.calculator-layout{grid-template-columns:1.15fr .85fr;align-items:stretch}.calculator-card,.result-card{padding:28px}.shape-help-grid{grid-template-columns:repeat(4,1fr)}.method-panel{grid-template-columns:.8fr 1.2fr;align-items:center;padding:36px}}@media (width<=559px){.calculator-fields{grid-template-columns:1fr}.result-secondary{grid-template-columns:1fr 1fr}}.calculator-intro{background:radial-gradient(circle at 90% 15%,#2d83f724,#0000 32%),linear-gradient(#fff,#f5faff);padding:34px 0 24px}.calculator-intro h1{letter-spacing:-.055em;max-width:16ch;margin:13px 0 16px;font-size:clamp(38px,10vw,64px);line-height:1.02}.calculator-intro .page-lead{margin-bottom:0}.calculator-help__layout{align-items:center;gap:28px;display:grid}.calculator-help__layout>div>img{filter:drop-shadow(0 18px 24px #092b5d14);width:min(100%,440px);margin:20px auto 0}.measure-field input[aria-invalid=true]{background:#fff7f6}.calculator-details{background:#fff}.calculator-detail-grid{gap:1rem;display:grid}.calculator-detail-grid article{border:1px solid var(--line);background:var(--surface);border-radius:1rem;padding:1.25rem}.calculator-detail-grid h3{margin-top:0}.calculator-detail-grid p{color:var(--muted);margin-bottom:0}@media (width>=800px){.calculator-help__layout{grid-template-columns:.72fr 1.28fr}.calculator-intro{padding:46px 0 30px}.calculator-detail-grid{grid-template-columns:repeat(3,1fr)}}.footer-privacy-button{color:#fff;width:max-content;font:inherit;cursor:pointer;background:0 0;border:0;padding:0;font-size:13px}.footer-privacy-button:hover{color:#8bc5ff}.footer-privacy-button:focus-visible{outline-offset:4px;outline:2px solid #8bc5ff}html{scroll-behavior:smooth;background:var(--surface)}body{background:var(--surface);color:var(--ink);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:16px;line-height:1.65}body::selection{background:var(--blue-100);color:var(--navy-950)}img,svg{max-width:100%;display:block}a{color:inherit}.shell{width:min(calc(100% - 30px),var(--shell));margin-inline:auto}.narrow{max-width:780px}.sr-only{clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important;width:1px!important;height:1px!important;margin:-1px!important;padding:0!important;position:absolute!important;overflow:hidden!important}.skip-link{z-index:9999;background:var(--navy-950);color:#fff;border-radius:10px;padding:10px 14px;position:fixed;top:12px;left:12px;transform:translateY(-180%)}.skip-link:focus{transform:none}.utility-bar{background:var(--navy-950);color:#dbe8ff;letter-spacing:.015em;font-size:11px;display:none}.utility-bar__inner{justify-content:space-between;align-items:center;min-height:29px;display:flex}.utility-bar__status{align-items:center;gap:7px;display:inline-flex}.utility-bar__status i{background:#36d7a8;border-radius:50%;width:7px;height:7px;box-shadow:0 0 0 4px #36d7a81f}.site-header{z-index:100;backdrop-filter:blur(18px);background:#fffffff0;border-bottom:1px solid #dce7f3e0;position:sticky;top:0}.header-row{justify-content:space-between;align-items:center;gap:10px;height:68px;display:flex}.brand{align-items:center;min-width:0;text-decoration:none;display:inline-flex}.brand img{width:158px;height:auto}.desktop-nav{align-items:center;gap:27px;display:none}.desktop-nav a{color:var(--ink-2);padding:24px 0;font-size:13px;font-weight:700;text-decoration:none;position:relative}.desktop-nav a:after{content:"";background:var(--blue-600);border-radius:4px;height:2px;transition:transform .2s;position:absolute;bottom:14px;left:0;right:0;transform:scaleX(0)}.desktop-nav a:hover,.desktop-nav a.is-active{color:var(--blue-700)}.desktop-nav a:hover:after,.desktop-nav a.is-active:after{transform:scaleX(1)}.header-actions{align-items:center;gap:7px;display:flex}.header-cta{display:none}.mobile-menu{position:relative}.mobile-menu summary{border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:12px;align-content:center;justify-items:center;gap:4px;width:43px;height:43px;list-style:none;display:grid}.mobile-menu summary::-webkit-details-marker{display:none}.mobile-menu summary span{background:var(--blue-700);border-radius:2px;width:18px;height:2px}.mobile-menu nav{border:1px solid var(--line);width:min(270px,100vw - 30px);box-shadow:var(--shadow);background:#fff;border-radius:16px;padding:9px;display:grid;position:absolute;top:50px;right:0}.mobile-menu nav a{color:var(--ink-2);border-radius:10px;padding:12px 13px;font-weight:750;text-decoration:none}.mobile-menu nav a:hover{background:var(--soft-blue);color:var(--blue-700)}.button{background:linear-gradient(180deg,var(--blue-600),var(--blue-700));color:#fff;border-radius:12px;justify-content:center;align-items:center;min-height:48px;padding:12px 20px;font-weight:800;text-decoration:none;transition:transform .18s,box-shadow .18s,background .18s;display:inline-flex;box-shadow:0 12px 26px #0b67e83b}.button:hover{transform:translateY(-2px);box-shadow:0 16px 32px #0b67e84d}.button-small{min-height:40px;padding:8px 14px;font-size:12px}.button-ghost{color:var(--blue-700);box-shadow:none;background:#fff;border:1px solid #a9cafa}.button-ghost:hover{background:var(--soft-blue);box-shadow:none}.button-light{color:var(--blue-700);box-shadow:none;background:#fff}.lang-switcher{position:relative}.lang-switcher summary{cursor:pointer;border:1px solid var(--line);background:#fff;border-radius:12px;justify-content:center;align-items:center;gap:4px;min-width:50px;height:42px;font-size:12px;font-weight:850;list-style:none;display:flex}.lang-switcher summary::-webkit-details-marker{display:none}.lang-menu{border:1px solid var(--line);width:170px;box-shadow:var(--shadow);background:#fff;border-radius:14px;padding:7px;position:absolute;top:48px;right:0}.lang-menu a{border-radius:9px;grid-template-columns:34px 1fr;align-items:center;padding:9px;font-size:14px;text-decoration:none;display:grid}.lang-menu a:hover,.lang-menu a[aria-current=page]{background:var(--soft-blue);color:var(--blue-700)}.hero{background:radial-gradient(circle at 88% 10%,#2d83f729,#0000 31%),radial-gradient(circle at 10% 75%,#1bbfd017,#0000 27%),linear-gradient(#fff 0%,#f9fcff 68%,#f2f8ff 100%);padding:45px 0 28px;position:relative;overflow:hidden}.hero:before{content:"";pointer-events:none;background-image:linear-gradient(#0b67e809 1px,#0000 1px),linear-gradient(90deg,#0b67e809 1px,#0000 1px);background-size:42px 42px;position:absolute;inset:0;mask-image:linear-gradient(#00000059,#0000 80%)}.hero-grid{align-items:center;gap:27px;display:grid;position:relative}.eyebrow,.section-kicker{color:var(--blue-700);text-transform:uppercase;letter-spacing:.13em;align-items:center;gap:7px;font-size:10px;font-weight:900;display:inline-flex}.eyebrow{background:var(--blue-100);border:1px solid #cfe4ff;border-radius:999px;padding:6px 9px}.hero h1,.page-main h1,.article h1{letter-spacing:-.058em;max-width:13ch;margin:13px 0 18px;font-size:clamp(39px,11.8vw,74px);line-height:1.015}.hero-copy>p,.page-lead,.article-lead{color:var(--ink-2);max-width:620px;font-size:17px;line-height:1.6}.hero-actions{grid-template-columns:1fr;gap:10px;margin:24px 0 17px;display:grid}.trust-row{color:var(--muted);flex-wrap:wrap;gap:8px 15px;margin:0;padding:0;font-size:12px;font-weight:700;list-style:none;display:flex}.trust-row li{align-items:center;gap:6px;display:flex}.trust-row span{width:18px;height:18px;color:var(--success);background:#e3f8f2;border-radius:50%;place-items:center;font-size:11px;display:grid}.hero-visual{place-items:center;min-height:315px;display:grid;position:relative}.hero-visual__glow{aspect-ratio:1;filter:blur(3px);background:radial-gradient(circle,#d9edff,#d9edff00 70%);border-radius:50%;width:72%;position:absolute}.hero-visual img{filter:drop-shadow(0 22px 22px #092b5d14);width:min(100%,520px);position:relative}.floating-result{min-width:144px;box-shadow:var(--shadow-sm);backdrop-filter:blur(10px);background:#fffffff0;border:1px solid #aaccf1eb;border-radius:15px;padding:12px 14px;position:absolute;bottom:9px;right:2px}.floating-result span,.floating-result em{color:var(--muted);font-size:10px;font-style:normal;display:block}.floating-result strong{color:var(--blue-700);margin:2px 0;font-size:30px;line-height:1;display:block}.floating-result small{font-size:14px}.feature-strip{border-top:1px solid #b5cfeba6;gap:8px;margin-top:22px;padding-top:17px;display:grid;position:relative}.feature-strip article{align-items:center;gap:11px;padding:9px 0;display:flex}.feature-strip__icon{background:var(--cyan-100);color:#067b85;border-radius:12px;place-items:center;width:38px;height:38px;font-weight:900;display:grid}.feature-strip__icon--2{background:var(--blue-100);color:var(--blue-700)}.feature-strip__icon--3{color:#ac6b00;background:#fff4df}.feature-strip strong,.feature-strip small{display:block}.feature-strip strong{font-size:12px}.feature-strip small{color:var(--muted);font-size:10px}.ad-slot{color:#76869c;text-align:center;text-transform:uppercase;letter-spacing:.14em;min-height:112px;margin:22px 0;font-size:10px}.ad-slot>span{margin-bottom:6px;display:block}.ad-slot .adsbygoogle{width:100%;min-width:250px}.ad-slot:has(ins.adsbygoogle[data-ad-status=unfilled]){display:none}ins.adsbygoogle[data-ad-status=unfilled]{display:none!important}.section{padding:58px 0}.section-heading{margin-bottom:22px}.section-heading--center{text-align:center}.section-heading--center h2,.section-heading--center p{margin-inline:auto}.section h2,.closing-cta h2{letter-spacing:-.045em;max-width:18ch;margin:9px 0 14px;font-size:clamp(29px,8vw,48px);line-height:1.08}.section-heading p,.section>div>p,.units-layout p,.faq-layout>div>p{max-width:650px;color:var(--muted)}.section-categories{background:#fff}.use-grid{gap:10px;display:grid}.use-card{border:1px solid var(--line);background:linear-gradient(145deg,#fff,#fbfdff);border-radius:18px;min-height:190px;padding:18px;transition:transform .2s,border-color .2s,box-shadow .2s;position:relative;overflow:hidden;box-shadow:0 8px 26px #081d400b}.use-card:hover{box-shadow:var(--shadow-sm);border-color:#acd0fb;transform:translateY(-4px)}.use-card:after{content:"";background:var(--blue-100);border-radius:50%;width:90px;height:90px;position:absolute;bottom:-35px;right:-30px}.use-icon{z-index:1;width:48px;height:48px;color:var(--blue-700);background:linear-gradient(145deg,#e8f4ff,#cde6ff);border-radius:14px;place-items:center;font-size:24px;display:grid;position:relative}.use-icon--pool{color:#078392;background:linear-gradient(145deg,#e9fbfd,#c8f3f6)}.use-icon--barrel{background:linear-gradient(145deg,#edf4ff,#d6e5ff)}.use-icon--box{color:var(--navy-700);background:linear-gradient(145deg,#f5f8fc,#e4edf7)}.use-card h3{margin:14px 0 7px;font-size:18px;line-height:1.2}.use-card p{z-index:1;color:var(--muted);margin:0;font-size:13px;position:relative}.use-card>a{z-index:2;width:31px;height:31px;color:var(--blue-700);border:1px solid var(--line);background:#fff;border-radius:50%;place-items:center;font-weight:900;text-decoration:none;display:grid;position:absolute;bottom:14px;right:17px}.formula-section{background:linear-gradient(#f6faff,#eef6ff)}.formula-panel{background:#ffffffc7;border:1px solid #d9e8f8;border-radius:24px;gap:27px;padding:23px;display:grid;box-shadow:0 24px 70px #081d4012}.formula-copy p{color:var(--ink-2)}.formula-box{background:var(--navy-950);color:#fff;border-radius:12px;flex-wrap:wrap;align-items:center;gap:8px;margin-top:12px;padding:13px 15px;font-size:18px;font-weight:850;display:inline-flex}.formula-box b{color:var(--cyan-500)}.formula-box span{color:#80c1ff}.text-link{color:var(--blue-700);margin-top:20px;font-weight:850;text-decoration:none;display:inline-block}.formula-example{grid-template-columns:1fr;align-items:center;gap:18px;display:grid}.dimension-diagram{place-items:center;min-height:175px;display:grid}.dimension-cube{border:2px solid var(--blue-500);background:linear-gradient(145deg,#ffffffe6,#a6d3ff73);width:120px;height:100px;position:relative;transform:skewY(-7deg);box-shadow:18px 18px #2d83f717}.dimension-cube:before{content:"";border:2px solid var(--blue-500);background:#e0f0ffcc;height:20px;position:absolute;top:-21px;left:17px;right:-19px;transform:skewY(7deg)}.dimension-cube:after{content:"";border:2px solid var(--blue-500);background:#beddff80;width:19px;height:107px;position:absolute;top:-10px;right:-21px;transform:skewY(43deg)}.dimension-cube span{color:var(--blue-700);font-size:11px;font-weight:900;position:absolute}.dimension-cube span:first-child{bottom:-25px;left:45px}.dimension-cube span:nth-child(2){bottom:28px;right:-33px}.dimension-cube span:nth-child(3){top:42px;left:-17px}.example-math{border:1px solid var(--line);background:#fff;border-radius:16px;padding:18px}.example-math span,.example-math small{color:var(--muted);font-size:11px;display:block}.example-math strong{margin:7px 0;font-size:20px;display:block}.example-math b{color:var(--blue-700);margin-top:8px;font-size:24px;display:block}.units-section{background:#fff}.units-layout,.faq-layout{gap:25px;display:grid}.unit-list{gap:8px;display:grid}.unit-list>div{border:1px solid var(--line);background:#fff;border-radius:12px;grid-template-columns:1fr auto 1fr;align-items:center;gap:13px;padding:13px 15px;display:grid;box-shadow:0 6px 18px #081d4009}.unit-list span{color:var(--muted)}.unit-list b{color:var(--blue-700)}.guides-section{background:var(--soft)}.guide-grid{gap:11px;display:grid}.guide-card{border:1px solid var(--line);background:#fff;border-radius:18px;min-height:218px;padding:18px;text-decoration:none;transition:transform .2s,border-color .2s;position:relative;overflow:hidden;box-shadow:0 8px 24px #081d400a}.guide-card:hover{border-color:#a8ccf5;transform:translateY(-4px)}.guide-card__number{color:#edf5fd;font-size:52px;font-weight:900;line-height:1;position:absolute;top:8px;right:14px}.guide-card__tag{color:var(--blue-700);text-transform:uppercase;letter-spacing:.12em;font-size:9px;font-weight:900;position:relative}.guide-card h3{margin:26px 0 8px;font-size:18px;line-height:1.25;position:relative}.guide-card p{color:var(--muted);margin:0;font-size:13px;position:relative}.guide-card>b{color:var(--blue-700);position:absolute;bottom:15px;left:18px}.section-link-row{justify-content:center;margin-top:23px;display:flex}.faq-section{background:#fff}.faq-list details{border-bottom:1px solid var(--line);padding:16px 0}.faq-list summary{cursor:pointer;justify-content:space-between;align-items:center;gap:14px;font-weight:850;list-style:none;display:flex}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary span{background:var(--blue-100);width:28px;height:28px;color:var(--blue-700);border-radius:50%;place-items:center;font-size:17px;display:grid}.faq-list details[open] summary span{transform:rotate(45deg)}.faq-list p{color:var(--muted);margin:11px 0 0}.final-section{padding-top:30px}.closing-cta{background:linear-gradient(135deg,var(--navy-950),#0c3f85 72%,#0b67e8);color:#fff;box-shadow:var(--shadow);border-radius:24px;gap:20px;padding:28px;display:grid;position:relative;overflow:hidden}.closing-cta:after{content:"";border:35px solid #ffffff12;border-radius:50%;width:250px;height:250px;position:absolute;top:-120px;right:-100px}.closing-cta>*{z-index:1;position:relative}.closing-cta p{color:#c9d9f0}.closing-cta .eyebrow{color:#bfe0ff;background:#ffffff1a;border-color:#ffffff24}.page-main{min-height:65vh;padding:52px 0 78px}.page-main h1{max-width:18ch}.content-section{border-top:1px solid var(--line);padding:23px 0}.content-section h2{letter-spacing:-.03em;font-size:24px}.content-section p,.content-section li{color:var(--ink-2)}.calculator-coming{gap:25px;display:grid}.feature-list{color:var(--ink-2);gap:10px;margin:24px 0;padding:0;list-style:none;display:grid}.construction-card{background:linear-gradient(145deg,var(--navy-950),#164b94);color:#fff;min-height:300px;box-shadow:var(--shadow);border-radius:26px;flex-direction:column;justify-content:center;align-items:center;gap:10px;display:flex}.construction-icon{color:var(--cyan-500);font-size:54px}.construction-card strong{font-size:28px}.construction-card b{color:#7fdcff;font-size:36px}.article-main{padding:48px 0 78px}.article{max-width:780px}.article h1{max-width:17ch}.article>section{border-top:1px solid var(--line);padding:24px 0}.article h2{letter-spacing:-.035em;font-size:27px}.article p,.article li{color:var(--ink-2)}.article-callout{background:var(--cyan-100);border:1px solid #b7edf2;border-radius:16px;margin:24px 0;padding:18px}.article-callout p{margin:5px 0 0}.back-link{color:var(--blue-700);margin-bottom:24px;font-weight:750;text-decoration:none;display:inline-block}.site-footer{background:var(--navy-950);color:#fff;padding:54px 0 20px}.footer-grid{gap:28px;display:grid}.footer-grid>div:not(:first-child){align-content:start;gap:8px;display:grid}.footer-grid h2{text-transform:uppercase;letter-spacing:.12em;color:#8faad1;font-size:11px}.footer-grid a{color:#fff;font-size:13px;text-decoration:none}.footer-grid a:hover{color:#8bc5ff}.footer-grid p{color:#9fb0ce;max-width:320px}.brand-footer{color:#fff}.footer-bottom{color:#8fa2c3;border-top:1px solid #ffffff1f;flex-wrap:wrap;justify-content:space-between;gap:8px;margin-top:34px;padding-top:26px;font-size:11px;display:flex}@media (width>=560px){.hero-actions{display:flex}.feature-strip{grid-template-columns:repeat(3,1fr)}.use-grid{grid-template-columns:repeat(2,1fr)}.formula-example{grid-template-columns:1fr 1fr}.guide-grid{grid-template-columns:repeat(2,1fr)}}@media (width>=760px){.utility-bar{display:block}.site-header{top:29px}.shell{width:min(calc(100% - 52px),var(--shell))}.brand img{width:190px}.header-cta{display:inline-flex}.mobile-menu{display:none}.hero{padding:75px 0 30px}.hero-grid{grid-template-columns:1.02fr .98fr;gap:38px}.hero-visual{min-height:430px}.floating-result{bottom:35px;right:8px}.feature-strip{margin-top:25px;padding-top:20px}.feature-strip article{justify-content:center}.use-grid{grid-template-columns:repeat(4,1fr)}.formula-panel{grid-template-columns:1fr 1fr;align-items:center;padding:34px}.units-layout,.faq-layout,.calculator-coming{grid-template-columns:1fr 1fr;align-items:center}.guide-grid,.guide-grid-full{grid-template-columns:repeat(3,1fr)}.closing-cta{grid-template-columns:1fr auto;align-items:center;padding:42px}.footer-grid{grid-template-columns:1.5fr repeat(3,1fr)}}@media (width>=980px){.desktop-nav{display:flex}.hero h1{font-size:68px}.hero-copy>p{font-size:18px}.section{padding:78px 0}.use-card{min-height:220px;padding:21px}.guide-card{min-height:240px;padding:21px}.guide-card h3{font-size:20px}}@media (width>=1180px){.hero{padding-top:90px}.hero h1{font-size:74px}.hero-visual img{width:600px}.floating-result{bottom:55px;right:0}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}.sitemap-grid{gap:16px;margin-top:30px;display:grid}.sitemap-grid section{border:1px solid var(--line);background:#fff;border-radius:20px;flex-direction:column;gap:9px;padding:22px;display:flex}.sitemap-grid h2{margin:0 0 8px}.sitemap-grid a{color:var(--blue-700);text-decoration:none}.article-hero{align-items:center;gap:20px;display:grid}.article-hero img{border-radius:24px;width:100%}.shape-help-grid article>span{background:var(--blue-100);width:42px;height:42px;color:var(--blue-700);border-radius:13px;place-items:center;margin-bottom:12px;font-size:20px;font-weight:900;display:grid;position:static}.guide-card__number{display:none!important}@media (width>=680px){.sitemap-grid{grid-template-columns:1fr 1.5fr 1fr}.article-hero{grid-template-columns:1.15fr .85fr}}