@layer reset,base,components,utilities;@layer reset{*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}body,h1,h2,h3,p,ul{margin:0}ul{padding:0;list-style:none}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}img,svg{display:block;max-width:100%}}@layer base{:root{--ink: #17351f;--ink-soft: #31513a;--paper: #f7f3e8;--paper-deep: #ece6d6;--white: #fffef9;--lime: #b8f23b;--mint: #dff2d4;--peach: #ffcfb4;--violet: #dcd2ff;--blue: #cfe7ff;--sand: #f1dfae;--line: rgba(23, 53, 31, .18);--shadow: 7px 7px 0 var(--ink);--radius-sm: 14px;--radius-md: 24px;--radius-lg: 34px;--container: 1180px;--serif: Georgia, "Times New Roman", serif;--sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif}body{min-width:320px;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.6;text-rendering:optimizeLegibility}a{color:inherit;text-decoration:none}button{color:inherit}:focus-visible{outline:3px solid #ff7c4f;outline-offset:4px}h1,h2,h3{font-family:var(--serif);font-weight:700;line-height:.98;letter-spacing:-.04em}h1{font-size:clamp(3.45rem,7.5vw,7.35rem)}h2{font-size:clamp(2.35rem,4.6vw,4.9rem)}h3{font-size:clamp(1.4rem,2vw,1.85rem)}em{color:#ef6c42;font-weight:inherit}}@layer components{.container{width:min(calc(100% - 40px),var(--container));margin-inline:auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:12px;left:12px;z-index:100;padding:10px 16px;background:var(--lime);border:2px solid var(--ink);transform:translateY(-150%)}.skip-link:focus{transform:translateY(0)}.site-header{position:relative;z-index:30;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--paper) 94%,transparent);backdrop-filter:blur(16px)}.header-inner{min-height:84px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:28px}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:850;font-size:1.17rem;letter-spacing:-.045em}.brand>span:last-child>span{color:#eb7048}.brand-mark{display:grid;place-items:center;width:35px;height:35px;border:2px solid var(--ink);background:var(--lime);border-radius:50%;font-family:var(--serif);font-size:1.35rem;box-shadow:2px 2px 0 var(--ink)}.site-nav{justify-self:center;display:flex;align-items:center;gap:32px;font-size:.9rem;font-weight:700}.site-nav a{position:relative}.site-nav a:after{content:"";position:absolute;left:0;right:100%;bottom:-4px;height:2px;background:var(--ink);transition:right .18s ease}.site-nav a:hover:after{right:0}.header-cta{display:inline-flex;align-items:center;gap:12px;padding:10px 15px;background:var(--white);border:1.5px solid var(--ink);border-radius:999px;font-size:.88rem;font-weight:800;transition:transform .16s ease,box-shadow .16s ease}.header-cta:hover{transform:translate(-2px,-2px);box-shadow:3px 3px 0 var(--ink)}.menu-toggle{display:none;background:none;border:0;padding:8px}.menu-toggle>span:not(.sr-only){display:block;width:23px;height:2px;margin:5px 0;background:var(--ink)}.hero{position:relative;overflow:hidden;padding:clamp(72px,9vw,128px) 0 176px}.hero:before{content:"";position:absolute;width:560px;height:560px;right:-260px;top:-360px;border:1px solid var(--line);border-radius:50%;box-shadow:0 0 0 90px #ffffff26,0 0 0 180px #ffffff1f}.hero-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(340px,.8fr);align-items:center;gap:56px}.eyebrow,.section-kicker{display:flex;align-items:center;gap:9px;margin-bottom:22px;font-size:.74rem;line-height:1;text-transform:uppercase;letter-spacing:.16em;font-weight:850}.eyebrow>span{width:29px;height:9px;border-radius:999px;background:var(--lime);border:1px solid var(--ink)}.hero h1{max-width:850px}.hero h1 em{display:block}.hero-intro{max-width:650px;margin-top:28px;color:var(--ink-soft);font-size:clamp(1.08rem,1.7vw,1.3rem);line-height:1.7}.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:26px;margin-top:34px}.button{display:inline-flex;align-items:center;justify-content:center;gap:18px;min-height:54px;padding:0 22px;border:2px solid var(--ink);border-radius:999px;font-weight:850;cursor:pointer;transition:transform .16s ease,box-shadow .16s ease,background .16s ease}.button:hover{transform:translate(-2px,-2px);box-shadow:4px 4px 0 var(--ink)}.button-primary{background:var(--lime)}.button-dark{background:var(--ink);color:var(--white)}.button-dark:hover{box-shadow:4px 4px #ef6c42}.button-light{background:var(--paper);color:var(--ink)}.text-link{display:inline-flex;gap:10px;align-items:center;font-weight:850;border-bottom:2px solid var(--ink);line-height:1.35}.text-link span{transition:transform .16s ease}.text-link:hover span{transform:translate(4px)}.trust-list{display:flex;flex-wrap:wrap;gap:23px;margin-top:38px;color:var(--ink-soft);font-size:.86rem;font-weight:700}.trust-list li{display:flex;align-items:center;gap:7px}.trust-list span{display:grid;place-items:center;width:19px;height:19px;background:var(--white);border:1px solid var(--ink);border-radius:50%;font-size:.65rem}.hero-visual{position:relative;aspect-ratio:1 / 1.02}.big-symbol{position:absolute;inset:8% 7% 5% 8%;display:grid;place-items:center;border:3px solid var(--ink);border-radius:46% 54% 51% 49%/48% 41% 59% 52%;background:var(--mint);box-shadow:12px 12px 0 var(--ink);font-family:var(--serif);font-size:clamp(10rem,20vw,18rem);line-height:1;transform:rotate(3deg)}.percent-orbit{position:absolute;z-index:2;display:grid;place-items:center;border:2px solid var(--ink);border-radius:50%;background:var(--white);box-shadow:4px 4px 0 var(--ink);font-family:var(--serif);font-weight:700;line-height:.82}.percent-orbit span{display:block;font-family:var(--sans);font-size:.68rem;letter-spacing:0}.orbit-one{width:96px;height:96px;right:-7px;top:10%;background:var(--peach);font-size:1.5rem;transform:rotate(8deg)}.orbit-two{width:116px;height:116px;left:-25px;bottom:2%;background:var(--violet);font-size:2rem;transform:rotate(-8deg)}.orbit-three{width:82px;height:82px;right:3%;bottom:4%;background:var(--lime);font-size:1.25rem;transform:rotate(6deg)}.scribble{position:absolute;z-index:3;top:-11px;left:13%;padding:6px 12px;border:1.5px solid var(--ink);background:var(--white);font-family:Comic Sans MS,cursive;font-size:.82rem;transform:rotate(-5deg)}.calculator-section{position:relative;z-index:3;margin-top:-92px;scroll-margin-top:26px}.calculator-shell{padding:clamp(24px,4vw,48px);border:2px solid var(--ink);border-radius:var(--radius-lg);background:var(--white);box-shadow:var(--shadow)}.calculator-heading{display:grid;grid-template-columns:1fr minmax(240px,380px);align-items:end;gap:36px}.calculator-heading h2{font-size:clamp(2rem,3.8vw,3.75rem)}.calculator-heading>p{color:var(--ink-soft)}.section-kicker{color:#cc512a;margin-bottom:16px}.mode-tabs{display:grid;grid-template-columns:repeat(4,1fr);margin-top:38px;border:1.5px solid var(--ink);border-radius:999px;overflow:hidden;background:var(--paper)}.mode-tab{min-height:51px;padding:9px 14px;border:0;border-right:1px solid var(--line);background:transparent;font-size:.82rem;font-weight:800;cursor:pointer}.mode-tab:last-child{border-right:0}.mode-tab.is-active{background:var(--ink);color:var(--white)}.calculator-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:28px;margin-top:28px}.input-panel{padding:clamp(20px,3vw,36px);border:1px solid var(--line);border-radius:var(--radius-md);background:var(--paper)}.input-row{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:end;gap:16px}.number-field>span:first-child{display:block;margin-bottom:8px;font-size:.77rem;text-transform:uppercase;letter-spacing:.09em;font-weight:850}.input-wrap{display:flex;align-items:center;border:2px solid var(--ink);border-radius:14px;background:var(--white);overflow:hidden;transition:box-shadow .16s ease}.input-wrap:focus-within{box-shadow:4px 4px 0 var(--lime)}.input-wrap input{width:100%;min-width:0;height:65px;padding:0 6px 0 16px;border:0;outline:0;background:transparent;color:var(--ink);font-size:clamp(1.4rem,2.7vw,2rem);font-weight:850}.input-wrap>span:last-child{padding-right:14px;font-size:1.2rem;font-weight:800}.input-wrap>span.is-hidden{display:none}.input-connector{padding-bottom:20px;color:var(--ink-soft);font-family:var(--serif);font-style:italic;font-size:1.1rem}.field-hint{margin-top:11px;color:var(--ink-soft);font-size:.77rem}.form-actions{display:flex;align-items:center;gap:18px;margin-top:25px}.clear-button{border:0;background:transparent;text-decoration:underline;text-underline-offset:4px;font-size:.84rem;font-weight:800;cursor:pointer}.result-panel{display:flex;flex-direction:column;min-height:310px;padding:clamp(24px,3vw,36px);border-radius:var(--radius-md);background:var(--ink);color:var(--white)}.result-topline{display:flex;justify-content:space-between;align-items:center;color:#c7d7cb;font-size:.72rem;text-transform:uppercase;letter-spacing:.12em;font-weight:850}.result-topline button{padding:5px 10px;border:1px solid #68826e;border-radius:999px;background:transparent;color:var(--white);text-transform:none;letter-spacing:0;cursor:pointer}#result-value{display:block;margin-top:16px;font-family:var(--serif);font-size:clamp(4rem,8vw,6.7rem);font-weight:700;line-height:.95;letter-spacing:-.05em;color:var(--lime);overflow-wrap:anywhere}#result-sentence{margin-top:14px;color:#d9e5dc}.formula-box{margin-top:auto;padding-top:22px;border-top:1px solid #47634f}.formula-box span{display:block;color:#9fb2a4;font-size:.68rem;text-transform:uppercase;letter-spacing:.1em;font-weight:800}.formula-box code{display:block;margin-top:7px;color:var(--white);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:clamp(.78rem,1.5vw,.92rem);white-space:normal}.popular-row{display:flex;align-items:center;flex-wrap:wrap;gap:9px;margin-top:23px;font-size:.77rem}.popular-row>span{font-weight:850}.popular-row button{padding:7px 11px;border:1px solid var(--line);border-radius:999px;background:transparent;cursor:pointer}.popular-row button:hover{background:var(--mint);border-color:var(--ink)}.categories-section{padding:138px 0 126px;scroll-margin-top:30px}.section-heading h2{max-width:770px}.split-heading{display:grid;grid-template-columns:1fr minmax(260px,380px);align-items:end;gap:60px}.split-heading>p{color:var(--ink-soft);font-size:1.05rem}.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:55px}.category-card{position:relative;min-height:385px;padding:29px;border:1.5px solid var(--ink);border-radius:var(--radius-md);background:var(--white);overflow:hidden;transition:transform .18s ease,box-shadow .18s ease}.category-card:hover{transform:translateY(-5px);box-shadow:6px 6px 0 var(--ink)}.category-card:before{content:"";position:absolute;width:135px;height:135px;top:-55px;right:-35px;border-radius:50%;background:var(--accent);border:1px solid var(--ink)}.accent-mint{--accent: var(--mint)}.accent-lime{--accent: var(--lime)}.accent-peach{--accent: var(--peach)}.accent-violet{--accent: var(--violet)}.accent-blue{--accent: var(--blue)}.accent-sand{--accent: var(--sand)}.category-number{position:relative;z-index:1;display:grid;place-items:center;width:38px;height:38px;border:1px solid var(--ink);border-radius:50%;background:var(--accent);font-size:.72rem;font-weight:850}.category-card h3{max-width:250px;margin-top:27px}.category-card>p{margin-top:15px;color:var(--ink-soft);font-size:.9rem;line-height:1.65}.category-card ul{display:flex;flex-wrap:wrap;gap:6px;margin-top:20px}.category-card li{padding:5px 9px;border-radius:999px;background:var(--paper);font-size:.68rem;font-weight:750}.category-card>a{position:absolute;left:29px;bottom:25px;display:inline-flex;align-items:center;gap:9px;border-bottom:1.5px solid var(--ink);font-size:.8rem;font-weight:850}.formula-section{padding:120px 0 130px;background:var(--ink);color:var(--white);scroll-margin-top:20px}.centered-heading{max-width:880px;margin-inline:auto;text-align:center}.centered-heading .section-kicker{justify-content:center;color:var(--lime)}.centered-heading>p:last-child{max-width:620px;margin:23px auto 0;color:#c5d4c8;font-size:1.05rem}.formula-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:58px}.formula-card{position:relative;min-height:390px;padding:30px;border:1px solid #5f7765;border-radius:var(--radius-md);background:#1d4228;overflow:hidden}.formula-card:nth-child(2){background:#f3ead4;color:var(--ink)}.formula-card:nth-child(3){background:var(--peach);color:var(--ink)}.formula-index{display:grid;place-items:center;width:43px;height:43px;border:1px solid currentColor;border-radius:50%;font-size:.72rem;font-weight:850}.formula-label{margin-top:37px;font-size:.72rem;text-transform:uppercase;letter-spacing:.12em;font-weight:850;opacity:.75}.formula-card h3{margin-top:9px}.formula-card code{display:block;margin-top:32px;padding:16px;border:1px solid currentColor;border-radius:var(--radius-sm);font-size:.82rem;white-space:normal}.formula-card>p:last-child{margin-top:25px;font-size:.87rem;opacity:.78}.explanation-section{padding:130px 0;background:var(--mint)}.explanation-grid{display:grid;grid-template-columns:1.05fr .75fr;gap:10vw;align-items:center}.explanation-statement h2{font-size:clamp(2.6rem,5.2vw,5.25rem)}.explanation-copy{font-size:1.04rem}.explanation-copy p+p{margin-top:20px}.explanation-copy .text-link{margin-top:30px}.faq-section{padding:130px 0;scroll-margin-top:20px}.faq-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:9vw;align-items:start}.faq-intro{position:sticky;top:28px}.faq-intro>p:last-child{margin-top:20px;color:var(--ink-soft)}.faq-list{border-top:1.5px solid var(--ink)}.faq-list details{border-bottom:1.5px solid var(--ink)}.faq-list summary{display:flex;justify-content:space-between;gap:24px;padding:25px 0;cursor:pointer;list-style:none;font-family:var(--serif);font-size:1.22rem;font-weight:700;line-height:1.25}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary span{transition:transform .18s ease}.faq-list details[open] summary span{transform:rotate(45deg)}.faq-list details p{max-width:690px;padding:0 44px 25px 0;color:var(--ink-soft)}.final-cta{padding-bottom:90px}.final-cta-inner{display:flex;justify-content:space-between;align-items:end;gap:40px;padding:clamp(30px,5vw,62px);border-radius:var(--radius-lg);background:#ef7048;color:var(--ink);box-shadow:var(--shadow)}.final-cta h2{max-width:720px}.final-cta .section-kicker{color:var(--ink)}.final-cta .button{flex:0 0 auto}.site-footer{padding:54px 0;border-top:1px solid var(--line);background:var(--paper-deep)}.footer-grid{display:grid;grid-template-columns:1fr auto auto;align-items:end;gap:50px}.footer-brand{margin-bottom:12px}.footer-grid>div>p{color:var(--ink-soft);font-size:.82rem}.site-footer nav{display:flex;flex-wrap:wrap;gap:22px;font-size:.78rem;font-weight:800}.copyright{color:var(--ink-soft);font-size:.75rem}.article-page{background:var(--white)}.article-hero{padding:50px 0 64px;border-bottom:2px solid var(--ink);background:var(--paper)}.article-hero-inner{position:relative}.breadcrumbs ol{display:flex;align-items:center;flex-wrap:wrap;gap:8px;color:var(--ink-soft);font-size:.76rem;font-weight:700}.breadcrumbs li{display:flex;align-items:center;gap:8px}.breadcrumbs a{border-bottom:1px solid transparent}.breadcrumbs a:hover{border-color:currentColor}.article-heading-grid{display:grid;grid-template-columns:1.18fr .82fr;align-items:end;gap:7vw;margin-top:68px}.article-heading-grid h1{max-width:760px;font-size:clamp(3.7rem,7.6vw,7.7rem)}.article-summary{padding:26px;border:1.5px solid var(--ink);border-radius:var(--radius-md);background:var(--mint);box-shadow:5px 5px 0 var(--ink)}.article-summary p{font-size:1.05rem;font-weight:650}.article-summary code{display:block;margin-top:20px;padding:13px 14px;border-radius:10px;background:var(--ink);color:var(--lime);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.83rem}.article-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:42px}.article-meta span{padding:7px 12px;border:1px solid var(--line);border-radius:999px;background:var(--white);font-size:.72rem;font-weight:800}.article-layout{display:grid;grid-template-columns:230px minmax(0,760px);justify-content:space-between;gap:clamp(55px,9vw,130px);padding-top:82px;padding-bottom:120px}.article-sidebar{position:sticky;top:30px;align-self:start;padding:22px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--paper)}.article-sidebar>p{margin-bottom:13px;font-size:.69rem;text-transform:uppercase;letter-spacing:.13em;font-weight:850}.article-sidebar nav{display:grid}.article-sidebar nav a{padding:8px 0;border-bottom:1px solid var(--line);color:var(--ink-soft);font-size:.77rem;font-weight:700}.article-sidebar nav a:hover{color:#cc512a}.sidebar-cta{display:flex;justify-content:space-between;align-items:center;margin-top:18px;padding:11px 13px;border-radius:10px;background:var(--ink);color:var(--white);font-size:.74rem;font-weight:850}.article-content{min-width:0}.article-lead{padding-bottom:46px;border-bottom:1px solid var(--line);font-family:var(--serif);font-size:clamp(1.45rem,2.5vw,2rem);line-height:1.45;letter-spacing:-.02em}.article-content>section{padding:72px 0;border-bottom:1px solid var(--line);scroll-margin-top:24px}.article-content h2{max-width:680px;margin-bottom:28px;font-size:clamp(2.2rem,4.4vw,4rem)}.article-content h3{line-height:1.15}.article-content section>p:not(.content-label){margin-top:18px;color:var(--ink-soft);font-size:1.02rem;line-height:1.8}.content-label{margin-bottom:17px;color:#cc512a;font-size:.7rem;text-transform:uppercase;letter-spacing:.14em;font-weight:850}.display-formula{display:grid;grid-template-columns:auto auto 1fr;align-items:center;gap:20px;margin:32px 0;padding:clamp(22px,4vw,34px);border:2px solid var(--ink);border-radius:var(--radius-md);background:var(--lime);box-shadow:5px 5px 0 var(--ink)}.display-formula span{font-family:var(--serif);font-size:1.35rem;font-weight:700}.display-formula strong{font-size:1.5rem}.display-formula code{justify-self:stretch;padding:12px;border-radius:10px;background:var(--white);text-align:center;font-size:clamp(.8rem,2vw,1rem)}.worked-steps{display:grid;margin-top:36px;border-top:1.5px solid var(--ink)}.worked-steps>div{display:grid;grid-template-columns:43px 1fr;gap:18px;padding:22px 0;border-bottom:1px solid var(--line)}.worked-steps>div>span{display:grid;place-items:center;width:38px;height:38px;border:1px solid var(--ink);border-radius:50%;background:var(--mint);font-size:.72rem;font-weight:850}.worked-steps p{color:var(--ink-soft)}.worked-steps strong{display:block;margin-bottom:3px;color:var(--ink)}.answer-callout{display:flex;justify-content:space-between;align-items:center;gap:25px;margin-top:28px;padding:22px 26px;border-radius:var(--radius-sm);background:var(--ink);color:var(--white)}.answer-callout span{color:#acc0b1;font-size:.68rem;text-transform:uppercase;letter-spacing:.12em;font-weight:850}.answer-callout strong{color:var(--lime);font-family:var(--serif);font-size:1.35rem}.shortcut-table{margin-top:35px;border:1.5px solid var(--ink);border-radius:var(--radius-sm);overflow:hidden}.shortcut-row{display:grid;grid-template-columns:.65fr 1.55fr .8fr}.shortcut-row+.shortcut-row{border-top:1px solid var(--line)}.shortcut-row>*{padding:13px 16px}.shortcut-row>*+*{border-left:1px solid var(--line)}.shortcut-head{background:var(--ink);color:var(--white);font-size:.68rem;text-transform:uppercase;letter-spacing:.08em;font-weight:850}.shortcut-row:not(.shortcut-head){font-size:.85rem}.shortcut-row:not(.shortcut-head):nth-child(odd){background:var(--paper)}.article-list{display:grid;gap:13px;margin-top:27px}.article-list li{position:relative;padding-left:31px;color:var(--ink-soft)}.article-list li:before{content:"✓";position:absolute;left:0;top:1px;display:grid;place-items:center;width:20px;height:20px;border:1px solid var(--ink);border-radius:50%;background:var(--lime);color:var(--ink);font-size:.63rem;font-weight:900}.inline-calculator-cta{display:flex;justify-content:space-between;align-items:center;gap:30px;margin-top:36px;padding:22px 25px;border:1.5px solid var(--ink);border-radius:var(--radius-sm);background:var(--peach);transition:transform .16s ease,box-shadow .16s ease}.inline-calculator-cta:hover{transform:translate(-3px,-3px);box-shadow:5px 5px 0 var(--ink)}.inline-calculator-cta small{display:block;margin-bottom:2px;text-transform:uppercase;letter-spacing:.09em;font-weight:850}.inline-calculator-cta strong{font-family:var(--serif);font-size:1.25rem}.inline-calculator-cta>span:last-child{font-size:1.7rem}.mistake-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:34px}.mistake-grid article{padding:21px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--paper)}.mistake-grid article>span{font-size:.68rem;font-weight:850}.mistake-grid h3{margin-top:20px;font-size:1.2rem}.mistake-grid p{margin-top:12px;color:var(--ink-soft);font-size:.8rem}.article-faq .faq-list{margin-top:34px}.article-content>.related-section{border-bottom:0}.compact-heading h2{font-size:clamp(2.1rem,4vw,3.3rem)}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:33px}.related-card{display:flex;flex-direction:column;min-height:290px;padding:22px;border:1.5px solid var(--ink);border-radius:var(--radius-sm);background:var(--accent);transition:transform .16s ease,box-shadow .16s ease}.related-card:hover{transform:translateY(-4px);box-shadow:4px 4px 0 var(--ink)}.related-card>span{font-size:.65rem;text-transform:uppercase;letter-spacing:.1em;font-weight:850}.related-card h3{margin-top:28px;font-size:1.35rem}.related-card p{margin-top:13px;color:var(--ink-soft);font-size:.8rem}.related-card strong{margin-top:auto;font-size:.75rem}.article-bottom-cta{padding:80px 0;background:#ef7048}.article-bottom-inner{display:flex;justify-content:space-between;align-items:end;gap:45px}.article-bottom-inner h2{font-size:clamp(2.8rem,5.6vw,5.8rem)}.article-bottom-inner .section-kicker{color:var(--ink)}}@layer utilities{@media(max-width:980px){.header-inner{grid-template-columns:auto auto 1fr}.site-nav{position:absolute;left:20px;right:20px;top:76px;display:none;padding:18px;border:2px solid var(--ink);border-radius:18px;background:var(--white);box-shadow:5px 5px 0 var(--ink)}.site-nav.is-open{display:grid;gap:4px}.site-nav a{padding:10px}.menu-toggle{display:block;justify-self:end;grid-column:3}.header-cta{display:none}.hero-grid{grid-template-columns:1fr .65fr}.category-grid{grid-template-columns:repeat(2,1fr)}.formula-grid{grid-template-columns:1fr}.formula-card{min-height:315px}.calculator-grid,.explanation-grid{grid-template-columns:1fr}.explanation-grid{gap:45px}.article-layout{grid-template-columns:1fr}.article-sidebar{position:static;display:none}.article-content{max-width:800px;margin-inline:auto}}@media(max-width:740px){.container{width:min(calc(100% - 26px),var(--container))}.header-inner{min-height:72px}.hero{padding:56px 0 145px}.hero-grid{grid-template-columns:1fr}.hero-visual{max-width:410px;width:88%;margin:20px auto 0}.hero-actions{align-items:flex-start;flex-direction:column;gap:20px}.trust-list{gap:12px 18px}.calculator-section{margin-top:-73px}.calculator-shell{border-radius:23px;box-shadow:5px 5px 0 var(--ink)}.calculator-heading,.split-heading,.faq-grid{grid-template-columns:1fr}.calculator-heading{gap:17px}.mode-tabs{grid-template-columns:repeat(2,1fr);border-radius:15px}.mode-tab{border-bottom:1px solid var(--line)}.mode-tab:nth-child(2){border-right:0}.mode-tab:nth-child(3),.mode-tab:nth-child(4){border-bottom:0}.input-row{grid-template-columns:1fr;gap:10px}.input-connector{padding:0;text-align:center}.form-actions{align-items:stretch;flex-direction:column}.form-actions .button{width:100%}.category-grid{grid-template-columns:1fr}.category-card{min-height:370px}.categories-section,.formula-section,.explanation-section,.faq-section{padding:96px 0}.split-heading{gap:25px}.faq-grid{gap:45px}.faq-intro{position:static}.final-cta-inner{align-items:flex-start;flex-direction:column}.footer-grid{grid-template-columns:1fr;align-items:start;gap:28px}.article-hero{padding:35px 0 50px}.article-heading-grid{grid-template-columns:1fr;gap:34px;margin-top:48px}.article-heading-grid h1{font-size:clamp(3.5rem,18vw,5.8rem)}.article-layout{padding-top:58px;padding-bottom:78px}.article-content>section{padding:56px 0}.display-formula{grid-template-columns:1fr;gap:10px;text-align:center}.display-formula strong{transform:rotate(90deg)}.answer-callout{align-items:flex-start;flex-direction:column}.shortcut-table{overflow-x:auto}.shortcut-row{min-width:590px}.mistake-grid,.related-grid{grid-template-columns:1fr}.related-card{min-height:245px}.article-bottom-inner{align-items:flex-start;flex-direction:column}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}}