@font-face{font-family:Barlow;src:url('assets/barlow-semibold.ttf') format('truetype');font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:Barlow Condensed;src:url('assets/barlow-condensed-semibold.ttf') format('truetype');font-weight:600;font-style:normal;font-display:swap}
:root{--canvas:#0b0e12;--panel:#12171d;--text:#f5f7f8;--muted:#a5afb9;--accent:#ff6b1a;--line:#2a333d;--light:#f1f3f4;--display:'Barlow Condensed',sans-serif;--body:'Avenir Next',Avenir,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;color-scheme:dark;font-family:var(--body);color:var(--text);background:var(--canvas);font-synthesis:none;scroll-behavior:smooth;scroll-padding-top:30px}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a,button,summary{touch-action:manipulation}svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}img{max-width:100%;display:block}button{cursor:pointer}h1,h2,h3,p,figure{margin:0}h1,h2,h3{font-family:var(--display);font-weight:600;letter-spacing:-.015em;text-wrap:balance}p{line-height:1.65}::selection{background:var(--accent);color:var(--canvas)}:focus-visible{outline:2px solid var(--accent);outline-offset:6px}body{scrollbar-color:#59616b var(--canvas)}.skip{position:absolute;left:20px;top:-80px;background:var(--accent);color:var(--canvas);padding:14px;z-index:10}.skip:focus{top:12px}.header{max-width:1440px;margin:auto;min-height:100px;padding:0 64px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}.brand{font-weight:850;font-size:30px;letter-spacing:-1.2px}.brand-period{color:var(--accent)}nav{display:flex;align-items:center;gap:36px;font-size:14px;font-weight:600}nav>a{padding:14px 0}nav a:hover,.text-link:hover,footer a:hover{color:var(--accent)}.nav-preview{display:flex;align-items:center;gap:12px;margin-left:18px}.nav-preview svg{width:16px}.hero{max-width:1440px;margin:auto;position:relative;padding:66px 64px 0;display:grid;grid-template-columns:47% 53%;align-items:center;overflow:hidden}.hero-copy{position:relative;z-index:2;padding-bottom:55px}.hero h1{font-family:Barlow,sans-serif;font-size:clamp(3.2rem,5.3vw,4.7rem);line-height:1.1;letter-spacing:-.02em;max-width:650px}.hero h1 span{color:var(--accent)}.hero-copy>p{margin-top:28px;color:var(--muted);font-size:17px;max-width:430px}.hero-actions{display:flex;align-items:center;gap:26px;margin-top:34px}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:27px;padding:16px 22px;min-height:52px;font-size:14px;font-weight:750;border-radius:4px;transition:background .18s,color .18s}.primary{background:var(--accent);color:var(--canvas)}.primary:hover{background:#ff8c4d}.text-link{display:inline-flex;align-items:center;gap:18px;font-size:14px;font-weight:650;text-underline-offset:6px;text-decoration:underline;text-decoration-color:#626971;transition:color .18s}.hero-products{height:560px;position:relative;margin-right:-64px;align-self:center}.hero-calculator{position:absolute;width:720px;max-width:none;height:480px;object-fit:cover;top:10px;left:-90px;opacity:1}.hero-app{width:206px;height:auto;position:absolute;left:14px;top:44px;border:5px solid #30363d;border-radius:24px;box-shadow:14px 22px 45px #0008;transform:rotate(-7deg)}.app-section,.calculator-section{padding:80px max(64px,calc((100vw - 1312px)/2)) 100px;scroll-margin-top:0}.app-section{background:var(--light);color:var(--canvas);color-scheme:light}.section-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #bfc6cc;padding-bottom:30px;gap:30px}.section-head h2{font-size:64px;line-height:1.04}.section-head h2 span{color:#b83b00}.section-head>p{font-size:16px;line-height:1.5;width:330px}.app-layout{display:grid;grid-template-columns:1fr 1fr;gap:100px;padding-top:64px;align-items:center}.app-visual{background:#dce1e4;position:relative;min-height:620px;display:flex;justify-content:center;align-items:flex-end;overflow:hidden;padding-top:40px}.app-visual>img{width:264px;border-radius:24px 24px 0 0;border:5px solid #263039;border-bottom:0;box-shadow:12px 18px 40px #20304024;transform:translateY(14px)}.app-content h3,.calculator-copy h3{font-size:48px;line-height:1.06}.app-content>p,.calculator-copy>p{font-size:16px;margin-top:22px;max-width:460px;color:#48535e}.tool-list{margin-top:32px;margin-bottom:30px}.tool-list details{border-top:1px solid #bdc5cc;padding:0}.tool-list details:last-child{border-bottom:1px solid #bdc5cc}.tool-list summary{font-size:16px;font-weight:650;list-style:none;display:flex;justify-content:space-between;gap:20px;align-items:center;padding:19px 0;cursor:pointer}.tool-list summary::-webkit-details-marker{display:none}.tool-list details[open] summary svg{transform:rotate(45deg)}.tool-list details>div{padding:0 22px 22px 0}.tool-list details p{color:#48535e;font-size:15px}.dark-button{background:var(--canvas);color:white}.dark-button:hover{background:#343e48}.app-content>.access-note{font-size:12px;margin-top:12px;color:#59636d}.calculator-section .section-head{border-color:var(--line)}.calculator-section .section-head h2 span{color:var(--muted)}.calculator-section .section-head>p{color:var(--muted)}.calculator-layout{display:grid;grid-template-columns:1.3fr 1fr;gap:80px;align-items:center;margin-top:56px}.calculator-visual img{aspect-ratio:3/2;object-fit:contain;width:100%;background:transparent}.calculator-copy>p{color:var(--muted)}footer{border-top:1px solid var(--line);padding:35px max(64px,calc((100vw - 1312px)/2));display:flex;align-items:center;gap:30px;font-size:12px;color:var(--muted)}footer .brand{color:var(--text);font-size:24px}footer>a:last-child{margin-left:auto;display:flex;align-items:center;gap:10px}footer svg{width:16px}.hero-copy{animation:arrive .75s cubic-bezier(.16,1,.3,1) both}@keyframes arrive{from{transform:translateY(16px);opacity:.6;filter:blur(3px)}to{transform:translateY(0);opacity:1;filter:blur(0)}}
@media(min-width:1440px){}@media(max-width:1439px){}@media(max-width:1100px){.header{padding:0 36px}.hero{padding-left:36px;padding-right:36px;grid-template-columns:48% 52%}.hero-products{margin-right:-36px}.hero-calculator{left:-125px}.hero-app{left:0;width:175px;top:70px}.hero-actions{gap:20px;flex-wrap:wrap}.app-section,.calculator-section{padding-left:36px;padding-right:36px}.app-layout{gap:55px}.calculator-layout{gap:45px}.app-visual{min-height:590px}footer{padding-left:36px;padding-right:36px}}
@media(max-width:760px){.header{min-height:80px;padding:0 24px}.brand{font-size:27px}nav{gap:22px;font-size:13px}.nav-preview{display:none}.hero{padding:48px 24px 0;display:flex;flex-direction:column;align-items:stretch}.hero-copy{padding:0}.hero h1{font-size:clamp(2.35rem,10.3vw,4rem)}.hero-copy>p{font-size:16px;margin-top:22px}.hero-actions{margin-top:26px;gap:24px}.hero-products{height:430px;margin:15px -24px 0;overflow:hidden}.hero-calculator{width:600px;height:400px;left:calc(50% - 265px);top:10px}.hero-app{width:151px;top:46px;left:calc(50% - 174px);border-width:4px;border-radius:19px}.app-section,.calculator-section{padding:54px 24px 60px}.section-head{align-items:flex-start;gap:20px;padding-bottom:24px}.section-head h2{font-size:45px;flex:1}.section-head>p{font-size:13px;width:155px;line-height:1.5}.app-layout{grid-template-columns:1fr;gap:36px;padding-top:30px}.app-visual{min-height:0;height:400px;padding-top:30px;align-items:flex-start}.app-visual>img{width:225px;transform:none}.app-content h3,.calculator-copy h3{font-size:42px}.app-content>p{margin-top:16px}.tool-list{margin-top:24px}.calculator-layout{grid-template-columns:1fr;gap:34px;margin-top:28px}.calculator-visual{margin:0 -24px}.calculator-copy>p{margin-top:18px}footer{padding:26px 24px;flex-wrap:wrap;gap:16px}footer .brand{font-size:23px}footer>a:last-child{font-size:12px}}
@media(max-width:380px){.header{padding:0 18px}nav{gap:14px}.hero{padding-left:18px;padding-right:18px}.hero-actions{gap:18px}.button{padding:14px 17px;gap:16px}.text-link{font-size:13px}.section-head{display:block}.section-head>p{width:auto;margin-top:18px}.section-head>p br{display:none}}@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}.hero-copy{animation:none}*{transition:none!important}}
/* Preserve source-image proportions at every viewport. */
.app-visual>img{height:auto}
.calculator-visual img{height:auto}
@media(max-width:760px){.hero-products{align-self:stretch;width:auto;flex-shrink:0}.section-head h2{white-space:nowrap}.section-head{gap:14px}.section-head>p{width:148px}.calculator-section .section-head h2{white-space:normal}.app-visual{height:450px}.app-visual>img{width:240px}.hero-app{max-width:none}}

.app-section :focus-visible{outline-color:#b83b00}

/* Product actions: visual placeholders until real destinations are supplied. */
.store-buttons{display:flex;gap:12px;flex-wrap:wrap}
.store-button{display:inline-flex;align-items:center;gap:13px;min-height:62px;min-width:175px;padding:12px 18px;background:var(--canvas);color:var(--text);border:0;border-radius:6px;text-align:left;transition:background .18s}
.store-button:hover{background:#343e48}
.store-button:active,.buy-button:active{transform:translateY(1px)}
.store-button>svg{width:25px;height:25px}
.store-button>span{display:flex;flex-direction:column;gap:2px}
.store-button small{font-size:12px;line-height:1.2}
.store-button strong{font-size:19px;font-weight:650;line-height:1.2;white-space:nowrap}
.app-content>.placeholder-feedback,.calculator-copy>.placeholder-feedback{font-size:13px;line-height:1.5;min-height:20px;margin:10px 0 0;color:var(--muted)}
.app-content>.placeholder-feedback{color:#48535e}
.app-content>.browser-preview{display:flex;align-items:baseline;flex-wrap:wrap;gap:8px 16px;font-size:13px;margin-top:8px}
.browser-preview a{text-decoration:underline;text-underline-offset:4px;font-weight:600;color:var(--canvas)}
.browser-preview a:hover{color:#b83b00}
.browser-preview span{font-size:12px;color:#59636d}
.calculator-features{list-style:none;margin:28px 0 32px;padding:0;max-width:460px}
.calculator-features li{padding:16px 0;border-top:1px solid var(--line)}
.calculator-features strong{display:block;font-size:15px;font-weight:650;line-height:1.4}
.calculator-features span{display:block;margin-top:6px;font-size:14px;line-height:1.6;color:var(--muted)}
.buy-button{border:0;min-width:200px}
@media(max-width:760px){.store-buttons{gap:10px}.store-button{flex:1 1 150px;min-width:0;padding:12px 14px;gap:10px}.store-button strong{font-size:18px}.store-button>svg{width:21px;height:21px}.calculator-features{margin:24px 0 28px}}

/* Calculator product carousel. */
.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}
.calculator-carousel{display:block;min-width:0;overflow:visible}
.carousel-stage{position:relative;height:clamp(380px,48vw,620px);overflow:hidden}
.calculator-slide{position:absolute;inset:0;display:grid;place-items:center;opacity:0;visibility:hidden;transform:translateX(16px);transition:opacity .18s ease,transform .32s cubic-bezier(.16,1,.3,1)}
.calculator-slide.is-active{z-index:1;opacity:1;visibility:visible;transform:none}
.calculator-slide img{aspect-ratio:auto;background:transparent}
.calculator-slide--product img{width:auto;max-width:none;height:clamp(380px,48vw,620px);object-fit:contain;transform:translateX(-13%)}
.calculator-slide--screen img{width:100%;max-width:none;height:clamp(380px,48vw,620px);object-fit:cover;object-position:center}
.carousel-controls{display:grid;grid-template-columns:48px 1fr 48px;align-items:center;gap:14px;margin-top:14px}
.carousel-arrow{width:48px;height:48px;display:grid;place-items:center;padding:0;border:1px solid var(--line);border-radius:4px;background:transparent;color:var(--text);transition:border-color .18s,color .18s,background .18s}
.carousel-arrow:hover{border-color:#59616b;background:var(--panel);color:var(--accent)}
.carousel-progress{display:flex;justify-content:center;align-items:center;gap:16px}
.carousel-dots{display:flex;align-items:center;gap:2px}
.carousel-dot{position:relative;width:34px;height:44px;padding:0;border:0;background:transparent}
.carousel-dot::before{content:"";position:absolute;left:7px;right:7px;top:21px;height:2px;background:#59616b;transition:background .18s}
.carousel-dot:hover::before,.carousel-dot.is-active::before{background:var(--accent)}
.carousel-count{min-width:38px;color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}
@media(max-width:1100px){.calculator-slide--product img{transform:translateX(-20%)}}
@media(max-width:760px){.carousel-stage{height:380px}.calculator-slide--product img,.calculator-slide--screen img{height:380px}.calculator-slide--product img{transform:translateX(-16%)}.carousel-controls{padding:0 24px;margin-top:10px}.calculator-slide--screen img{object-position:center}}

/* Calculator specifications extend the existing product catalog. */
.calculator-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.outline-button{border:1px solid var(--line);color:var(--text);background:transparent}
.outline-button:hover{background:var(--panel);border-color:var(--muted)}
nav a[aria-current="page"]{text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:8px}
.specification-main{max-width:1440px;margin:auto;padding:0 64px}
.spec-intro{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:36px;padding:48px 0}
.spec-intro h1{font-family:Barlow,sans-serif;font-size:clamp(3.2rem,5.3vw,4.7rem);line-height:1.1;letter-spacing:-.02em}
.spec-intro h1 span{color:var(--muted)}
.spec-intro-copy>p{max-width:490px;margin-top:24px;color:var(--muted)}
.spec-intro .calculator-actions{margin-top:32px;gap:24px}
.spec-intro-copy>.placeholder-feedback{min-height:20px;margin-top:12px;font-size:12px}
.spec-product{height:510px;overflow:hidden;display:grid;place-items:center}
.spec-product img{height:510px;width:auto;max-width:none;transform:translateX(-10%)}
.spec-nav{border-top:1px solid var(--line);border-bottom:1px solid var(--line);gap:32px;flex-wrap:wrap;padding:10px 0}
.spec-section{display:grid;grid-template-columns:1fr 1.3fr;gap:80px;padding:80px 0}
.spec-section-heading h2{font-size:48px;line-height:1.06}
.spec-section-heading>p{margin-top:20px;max-width:460px;color:var(--muted)}
.spec-table{margin:0}
.spec-table>div{display:grid;grid-template-columns:160px 1fr;gap:24px;padding:20px 0;border-bottom:1px solid var(--line);line-height:1.65}
.spec-table>div:first-child{padding-top:0}
.spec-table dt{font-weight:650}
.spec-table dd{margin:0;color:var(--muted)}
.spec-workflow{padding:64px 0 80px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.spec-workflow>.spec-section-heading{display:grid;grid-template-columns:1fr 1.3fr;gap:80px;align-items:start}
.spec-workflow>.spec-section-heading>p{margin-top:0}
.spec-screen-pair{display:grid;grid-template-columns:1fr 1fr;gap:36px;margin-top:40px}
.spec-screen-image{aspect-ratio:4/3;overflow:hidden}
.spec-screen-image img{width:100%;height:100%;object-fit:contain}
.spec-screen-pair figcaption{padding-top:24px;max-width:460px}
.spec-screen-pair h3,.formula-catalog h3{font-family:var(--body);font-size:16px;font-weight:650;letter-spacing:normal}
.spec-screen-pair figcaption p,.formula-catalog p{margin-top:10px;color:var(--muted)}
.formula-catalog{border-top:1px solid var(--line);padding-top:24px}
.formula-catalog .text-link{margin-top:32px}
@media(max-width:1100px){.specification-main{padding:0 36px}.spec-intro{gap:20px}.spec-product{height:450px}.spec-product img{height:450px}.spec-section,.spec-workflow>.spec-section-heading{gap:40px}.spec-table>div{grid-template-columns:130px 1fr;gap:20px}}
@media(max-width:760px){.specification-main{padding:0 24px}.spec-intro{grid-template-columns:1fr;gap:12px;padding:40px 0 24px}.spec-intro h1{font-size:clamp(2.35rem,10.3vw,4rem)}.spec-intro-copy>p{margin-top:20px}.spec-intro .calculator-actions{gap:20px}.spec-product{height:350px}.spec-product img{height:350px;transform:translateX(-12%)}.spec-nav{gap:8px 24px}.spec-section{grid-template-columns:1fr;gap:32px;padding:48px 0}.spec-section-heading h2{font-size:42px}.spec-workflow{padding:48px 0}.spec-workflow>.spec-section-heading{grid-template-columns:1fr;gap:20px}.spec-screen-pair{grid-template-columns:1fr;gap:36px;margin-top:28px}.spec-screen-pair figcaption{padding-top:16px}.spec-table>div{grid-template-columns:115px 1fr;gap:16px;padding:16px 0}.spec-table dt,.spec-table dd{font-size:14px}}

/* The printed manual included with the physical calculator. */
.spec-manual{display:grid;grid-template-columns:1fr 1.3fr;align-items:center;gap:80px;padding:64px 0;border-top:1px solid var(--line)}
.manual-visual{display:flex;justify-content:center;min-width:0}
.manual-visual img{width:auto;height:440px;max-width:100%;object-fit:contain}
@media(max-width:1100px){.spec-manual{gap:40px}.manual-visual img{height:400px}}
@media(max-width:760px){.spec-manual{grid-template-columns:1fr;gap:28px;padding:48px 0}.manual-visual img{height:auto;width:min(100%,340px)}}

.spec-purchase{padding:32px 0 60px;border-top:1px solid var(--line)}
.spec-purchase .calculator-actions{justify-content:space-between;gap:24px}
.spec-purchase .placeholder-feedback{min-height:20px;margin-top:12px;color:var(--muted);font-size:12px}

.carousel-rotation{display:grid;place-items:center;width:44px;height:44px;padding:0;border:0;border-radius:4px;background:transparent;color:var(--muted)}
.carousel-rotation:hover{color:var(--accent);background:var(--panel)}
.carousel-rotation svg{width:16px;height:16px}
.carousel-rotation svg[hidden]{display:none}
@media(max-width:380px){.carousel-progress{gap:8px}.carousel-dot{width:28px}}