:root{--blue:#253a78;--deep:#17244f;--bright:#5671c7;--lime:#d9f26e;--coral:#ff7766;--cream:#f5f1e8;--paper:#fffdf8;--ink:#29334f;--muted:#747b8b;--line:#dbd9dc;--shadow:0 24px 70px rgba(37,58,120,.14)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--cream);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55;-webkit-font-smoothing:antialiased}a{color:inherit;text-underline-offset:3px}button,input,select{font:inherit}.icon{width:1.2em;height:1.2em;flex:none}.shell{width:min(1160px,calc(100% - 44px));margin:auto}.narrow{width:min(850px,calc(100% - 44px))}.skip-link{position:fixed;z-index:99;top:0;left:10px;padding:10px;color:var(--deep);background:var(--lime);clip-path:inset(100%)}.skip-link:focus{top:10px;clip-path:none}.site-header{color:white;background:var(--blue);border-bottom:1px solid rgba(255,255,255,.14)}.header-inner{min-height:79px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:flex;align-items:center;gap:10px;color:white;text-decoration:none}.brand-mark{width:42px;height:42px;display:grid;place-items:center;color:var(--deep);background:var(--lime);border-radius:50%}.brand-mark .icon{width:24px;height:24px}.brand>span:last-child{display:grid;line-height:1.03}.brand strong{font-size:13px}.brand b{color:var(--lime);font-size:9px;letter-spacing:.18em;text-transform:uppercase}.site-header nav{display:flex;gap:30px}.site-header nav a{color:#b3bbdc;font-size:12px;font-weight:780;text-decoration:none}.site-header nav a:hover,.site-header nav a[aria-current=page]{color:var(--lime)}.head-link{display:flex;align-items:center;gap:8px;color:var(--lime);font-size:12px;font-weight:850}
.hero{overflow:hidden;color:white;background:radial-gradient(circle at 8% 87%,rgba(217,242,110,.1) 0 140px,transparent 142px),linear-gradient(112deg,var(--blue) 0 68%,#344b91 68%)}.hero-grid{min-height:625px;display:grid;grid-template-columns:1fr .93fr;align-items:center;gap:86px;padding-block:70px 78px}.eyebrow,.chapter{margin:0 0 14px;color:var(--lime);font-size:9px;font-weight:900;letter-spacing:.17em;text-transform:uppercase}.eyebrow.blue,.chapter{color:#5971b1}h1,h2,h3,p{margin-top:0}.hero h1,.subhero h1,.not-found h1{margin-bottom:25px;font:500 clamp(55px,6.7vw,86px)/.94 Georgia,serif;letter-spacing:-.055em}.hero h1 em,.subhero h1 em{color:var(--lime);font-style:italic}.hero-grid>div:first-child>p:not(.eyebrow){max-width:570px;margin-bottom:29px;color:#d2d7e9;font-size:18px}.button{display:inline-flex;min-height:51px;align-items:center;gap:9px;padding:12px 22px;color:var(--deep);background:var(--lime);box-shadow:8px 8px 0 var(--coral);text-decoration:none;font-size:13px;font-weight:900}
.calendar-card{position:relative;padding:29px;color:var(--ink);background:var(--paper);box-shadow:13px 13px 0 var(--coral);transform:rotate(.8deg)}.cal-head{display:flex;justify-content:space-between;padding-bottom:14px;border-bottom:2px solid var(--blue);font-size:8px;font-weight:900;letter-spacing:.12em}.cal-head b{color:var(--coral)}.date-row{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:15px;margin:25px 0}.date-row article{display:grid;justify-items:center;padding:16px;background:#eef0f8}.date-row small,.cal-result span{font-size:7px;font-weight:900}.date-row strong{color:var(--blue);font:500 42px Georgia,serif}.date-row span{color:var(--muted);font-size:7px}.date-row>i{color:var(--coral)}.cal-result{display:flex;justify-content:space-between;align-items:end;padding:18px;background:#eff7ce}.cal-result strong{font:500 25px Georgia,serif}.cal-meta{display:flex;justify-content:space-between;margin-top:15px;color:var(--muted);font-size:7px}.seal{position:absolute;right:-27px;bottom:-42px;width:92px;height:92px;display:grid;place-content:center;color:var(--deep);background:var(--lime);border-radius:50%;font:700 25px/1 Georgia,serif;text-align:center;transform:rotate(-7deg)}.seal small{display:block;margin-top:3px;font:8px sans-serif}.fact-row{min-height:90px;display:grid;grid-template-columns:repeat(3,1fr);align-items:center;gap:20px}.fact-row span{display:flex;align-items:center;gap:8px;color:#bbc2df;font-size:9px}.fact-row b{color:white}.fact-row .icon{color:var(--lime)}
.calculator-wrap{padding:105px 0 115px}.section-heading{display:grid;grid-template-columns:1.15fr .85fr;align-items:end;gap:70px;margin-bottom:43px}.section-heading h2{margin:0;font:500 clamp(42px,5vw,63px)/1 Georgia,serif;letter-spacing:-.05em}.section-heading>p{max-width:470px;margin:0;color:var(--muted);font-size:14px}.calculator-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.input-panel,.result-panel{padding:31px;background:var(--paper);border:1px solid var(--line);box-shadow:var(--shadow)}.panel-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:26px}.panel-head span{color:#5c72b0;font-size:8px;font-weight:900;letter-spacing:.14em}.panel-head b{font-size:17px}.field-pair{display:grid;grid-template-columns:1fr 1fr;gap:11px}.field{display:grid;gap:7px;margin-bottom:18px}.field>span{color:var(--muted);font-size:9px;font-weight:780}.field input,.field select{width:100%;min-height:53px;padding:0 12px;color:var(--ink);background:#eef0f8;border:1px solid #dadeea;border-radius:4px;outline:0;font-size:11px;font-weight:750}.field input:focus,.field select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,58,120,.12)}.toggle{display:flex;align-items:center;gap:10px;margin:8px 0 20px;padding:15px;background:#eff7ce}.toggle input{width:18px;height:18px;accent-color:var(--blue)}.toggle span{display:grid}.toggle b{font-size:10px}.toggle small{color:var(--muted);font-size:7px}.form-error{min-height:18px;margin:2px 0;color:#aa4036;font-size:9px;font-weight:800}.local-note{display:flex;gap:7px;margin:13px 0 0;color:var(--muted);font-size:8px}.result-panel{color:white;background:var(--blue);border-color:var(--blue)}.panel-head.dark span{color:var(--lime)}.main-result{display:grid;padding-bottom:23px;border-bottom:1px solid rgba(255,255,255,.14)}.main-result span{color:#bbc3df;font-size:8px}.main-result strong{margin:3px 0;color:var(--lime);font:500 47px Georgia,serif}.main-result small{color:#aeb7d5}.result-list{margin:14px 0}.result-list>div{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.12)}.result-list dt{display:grid;grid-template-columns:auto 1fr;align-items:center;gap:0 9px;font-size:10px}.result-list dt i{grid-row:1/3;width:29px;height:29px;display:grid;place-items:center;color:var(--deep);background:var(--lime);border-radius:50%;font-style:normal;font-size:8px;font-weight:900}.result-list dt small{color:#9ea8ca;font-size:7px}.result-list dd{margin:0;font-weight:850}.span-label{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:9px;margin-top:14px;padding:13px;color:var(--deep);background:var(--lime);font-size:8px;text-align:center}
.shift-section{margin-top:95px}.compact-heading{margin-bottom:35px}.shift-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.shift-input,.shift-result{padding:31px;background:var(--paper);border:1px solid var(--line)}.shift-result{display:grid;align-content:center;color:white;background:var(--blue);border-color:var(--blue)}.shift-result>span{color:#bac3df;font-size:8px}.shift-result strong{color:var(--lime);font:500 43px Georgia,serif}.shift-result b{font-size:14px}.shift-result p{margin:18px 0 0;padding-top:14px;color:#aeb8d5;border-top:1px solid rgba(255,255,255,.15);font-size:8px}
.explain{padding:105px 0 115px;color:white;background:var(--deep)}.section-heading.inverse h2{color:white}.section-heading.inverse>a{display:flex;align-items:center;gap:8px;color:var(--lime);font-size:12px;font-weight:850}.explain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.explain-grid article{min-height:235px;padding:27px;background:#20316a;border:1px solid #3b4c87}.explain-grid article>span{color:var(--lime);font-size:9px}.explain-grid h3{margin:65px 0 9px;font:500 24px Georgia,serif}.explain-grid p{color:#aab3d0;font-size:10px}
.subhero{padding:100px 0 95px;color:white;background:var(--blue)}.subhero.compact{padding-block:72px}.subhero>div>p:last-child{color:#cbd1e6;font-size:18px}.prose{max-width:870px;padding-block:85px 115px}.prose section{margin-bottom:70px}.prose h2,.legal h2{margin-bottom:17px;font:500 40px/1.08 Georgia,serif;letter-spacing:-.04em}.prose p,.legal p{color:var(--muted);font-size:17px;line-height:1.75}.faq-list{max-width:900px;padding-block:75px 110px}.faq-list details{border-top:1px solid var(--line);background:var(--paper)}.faq-list summary{position:relative;padding:24px 52px 24px 6px;cursor:pointer;list-style:none;font:500 23px Georgia,serif}.faq-list summary:after{position:absolute;right:15px;color:var(--coral);content:"+"}.faq-list details[open] summary:after{content:"−"}.faq-list details>div{max-width:760px;padding:0 52px 25px 6px;color:var(--muted)}.legal{max-width:800px;padding-block:80px 110px}.legal section{margin-bottom:44px}.legal h2{font-size:29px}.legal p{font-size:16px}.legal a{color:#5269a8;font-weight:750}.not-found{min-height:620px;display:grid;place-items:center;padding:80px 0;color:white;background:var(--blue);text-align:center}.not-found span{color:var(--lime);font-size:9px}.not-found h1{margin-top:16px}
.site-footer{color:#a4acca;background:#09122e}.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr;gap:70px;padding-block:65px 50px}.footer-grid>div{display:flex;flex-direction:column;align-items:flex-start;gap:8px}.footer-grid p{margin:10px 0 0;color:#4f5878;font-size:11px}.footer-grid>div>b{color:var(--lime);font-size:9px}.footer-grid a:not(.brand){font-size:11px;text-decoration:none}.footer-bottom{display:flex;justify-content:space-between;padding-block:18px;color:#4c5573;border-top:1px solid #202a49;font-size:9px}
@media(max-width:720px){.shell,.narrow{width:min(100% - 30px,1160px)}.header-inner{min-height:68px}.site-header nav{display:none}.head-link{font-size:0}.hero-grid{min-height:auto;grid-template-columns:1fr;gap:48px;padding-block:55px 70px}.hero h1,.subhero h1{font-size:49px}.hero-grid>div:first-child>p:not(.eyebrow){font-size:16px}.calendar-card{padding:22px;box-shadow:8px 8px 0 var(--coral)}.seal{right:-3px}.fact-row{grid-template-columns:1fr;gap:9px;padding-block:20px}.calculator-wrap{padding-block:72px 82px}.section-heading{grid-template-columns:1fr;gap:17px}.section-heading h2{font-size:43px}.calculator-grid,.shift-grid{grid-template-columns:1fr}.input-panel,.result-panel,.shift-input,.shift-result{padding:23px}.field-pair{grid-template-columns:1fr}.shift-section{margin-top:70px}.explain{padding-block:75px 82px}.explain-grid{grid-template-columns:1fr}.subhero{padding-block:70px}.prose{padding-block:65px 90px}.prose h2{font-size:34px}.faq-list{padding-block:55px 80px}.footer-grid{grid-template-columns:1fr 1fr;gap:38px 25px}.footer-grid>div:first-child{grid-column:1/-1}}
@media(max-width:420px){.hero h1,.subhero h1{font-size:43px}.date-row{grid-template-columns:1fr}.date-row>i{justify-self:center;transform:rotate(90deg)}.cal-result{align-items:flex-start;flex-direction:column;gap:5px}.main-result strong{font-size:39px}.span-label{grid-template-columns:1fr}.span-label>i{justify-self:center;transform:rotate(90deg)}.footer-bottom{flex-direction:column;gap:5px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}