/*! tailwindcss v4.2.1 | MIT License | https://tailwindcss.com */
@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.fixed{position:fixed}.relative{position:relative}.static{position:static}.start{inset-inline-start:var(--spacing)}.container{width:100%}@media (width>=40rem){.container{max-width:40rem}}@media (width>=48rem){.container{max-width:48rem}}@media (width>=64rem){.container{max-width:64rem}}@media (width>=80rem){.container{max-width:80rem}}@media (width>=96rem){.container{max-width:96rem}}.block{display:block}.hidden{display:none}.table{display:table}.rounded{border-radius:.25rem}.overline{text-decoration-line:overline}}:root{--forest:#173f3a;--forest-deep:#0d2926;--mint:#bceadf;--lime:#d8f28b;--coral:#ff745c;--linen:#f4f0e7;--paper:#fffdf7;--ink:#182321;--muted:#64706c;--line:#c9d1ca;--blue:#2b65d9}*{box-sizing:border-box}html{scroll-behavior:smooth}body{color:var(--ink);background:var(--linen);margin:0;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}a{color:inherit}button,input,select{font:inherit}button,summary{-webkit-tap-highlight-color:transparent}::selection{color:var(--forest-deep);background:var(--lime)}.site-nav{z-index:50;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#f4f0e7eb;border-bottom:1px solid #173f3a29;grid-template-columns:1fr auto 1fr;align-items:center;min-height:76px;padding:0 4vw;display:grid;position:sticky;top:0}.wordmark{align-items:center;gap:11px;width:max-content;text-decoration:none;display:inline-flex}.wordmark>span{width:42px;height:42px;color:var(--linen);background:var(--forest);letter-spacing:.06em;border-radius:50% 50% 46% 54%/43% 47% 53% 57%;place-items:center;font-size:9px;font-weight:800;display:grid;transform:rotate(-7deg)}.wordmark>strong{letter-spacing:-.04em;font-size:13px;line-height:.95}.nav-links{gap:28px;display:flex}.nav-links a{color:#53605c;font-size:12px;text-decoration:none}.nav-links a:hover{color:var(--forest)}.nav-cta{color:var(--paper);background:var(--forest);border-radius:999px;justify-self:end;align-items:center;gap:18px;padding:11px 14px 11px 18px;font-size:11px;text-decoration:none;display:flex}.nav-cta span{width:24px;height:24px;color:var(--forest);background:var(--lime);border-radius:50%;place-items:center;display:grid}.hero{min-height:780px;color:var(--linen);background:var(--forest);grid-template-columns:1fr auto;padding:95px 5vw 58px;display:grid;position:relative;overflow:hidden}.bubble-field{pointer-events:none;position:absolute;inset:0}.bubble-field:before{content:"";border:1px solid #d8f28b5c;border-radius:50%;width:64vw;height:64vw;position:absolute;top:-28vw;right:-17vw;box-shadow:0 0 0 8vw #d8f28b08,0 0 0 17vw #d8f28b05}.bubble-field i{border:1px solid #bceadf66;border-radius:50%;display:block;position:absolute}.bubble-field i:first-child{width:76px;height:76px;top:23%;left:59%}.bubble-field i:nth-child(2){background:#bceadf1a;width:29px;height:29px;top:38%;left:52%}.bubble-field i:nth-child(3){width:150px;height:150px;bottom:9%;right:8%}.bubble-field i:nth-child(4){background:var(--coral);border-color:var(--coral);width:18px;height:18px;bottom:13%;left:35%}.hero-copy{z-index:1;flex-direction:column;display:flex;position:relative}.hero-kicker{max-width:760px;color:var(--mint);letter-spacing:.11em;text-transform:uppercase;border-bottom:1px solid #f4f0e73b;justify-content:space-between;align-items:center;padding-bottom:17px;font-size:10px;display:flex}.hero-kicker b{color:#94aea8;font-weight:500}.hero h1{letter-spacing:-.072em;max-width:1050px;margin:69px 0 43px;font-family:Georgia,Times New Roman,serif;font-size:clamp(74px,9.2vw,147px);font-weight:400;line-height:.85}.hero h1 em{color:var(--lime);font-weight:400}.hero-copy>p{color:#b7c9c4;letter-spacing:-.025em;max-width:675px;margin:0;font-size:clamp(18px,1.8vw,25px);line-height:1.45}.hero-proof{grid-template-columns:repeat(3,1fr);max-width:900px;margin-top:auto;padding-top:70px;display:grid}.hero-proof div{border-top:1px solid #f4f0e738;grid-template-columns:35px 1fr;gap:10px;padding:15px 22px 15px 0;display:grid}.hero-proof div+div{border-left:1px solid #f4f0e738;padding-left:22px}.hero-proof strong{color:var(--coral);font-size:10px}.hero-proof span{color:#aebfba;font-size:12px;line-height:1.35}.hero-scroll{z-index:1;width:150px;height:150px;color:var(--forest-deep);background:var(--lime);border-radius:50%;align-content:center;align-self:end;place-items:center;text-decoration:none;display:grid;position:relative;transform:rotate(5deg)}.hero-scroll span{font-size:12px;font-weight:750;line-height:1.15}.hero-scroll b{margin-top:14px;font-size:25px}.calculator-section{grid-template-columns:minmax(280px,.78fr) minmax(600px,1.45fr);align-items:start;gap:6vw;padding:110px 5vw 120px;display:grid}.calculator-intro{position:sticky;top:120px}.section-number{color:#39796f;letter-spacing:.12em;text-transform:uppercase;font-size:10px;font-weight:750;display:block}.calculator-intro h2,.section-heading h2,.measurement-copy h2,.hardness-section h2,.faq-heading h2,.sources-section h2,.final-cta h2{letter-spacing:-.055em;margin:34px 0 26px;font-family:Georgia,Times New Roman,serif;font-size:clamp(46px,5vw,76px);font-weight:400;line-height:.95}.calculator-intro>p{max-width:430px;color:var(--muted);font-size:17px;line-height:1.65}.intro-note{border-left:3px solid var(--coral);background:var(--paper);margin-top:54px;padding:22px}.intro-note strong{color:var(--forest);font-size:12px}.intro-note p{color:var(--muted);margin:8px 0 0;font-size:12px;line-height:1.55}.calculator-shell{background:var(--paper);border:1px solid #bdc8c1;border-radius:28px;overflow:hidden;box-shadow:0 24px 70px #173f3a1a}.calculator-head{color:var(--paper);background:var(--forest-deep);justify-content:space-between;align-items:start;padding:32px 34px;display:flex}.calculator-head h2{letter-spacing:-.04em;margin:9px 0 0;font-family:Georgia,Times New Roman,serif;font-size:34px;font-weight:400}.step-tag{color:var(--lime);letter-spacing:.12em;text-transform:uppercase;font-size:9px}.text-button{color:#9cb0ab;cursor:pointer;background:0 0;border:0;padding:8px 0;font-size:11px}.form-section{border-bottom:1px solid #d9ded9;padding:32px 34px}.form-section-title{align-items:start;gap:14px;margin-bottom:24px;display:flex}.form-section-title>span{width:29px;height:29px;color:var(--forest);background:var(--mint);border-radius:50%;place-items:center;font-size:9px;font-weight:800;display:grid}.form-section-title div{gap:4px;display:grid}.form-section-title strong{font-size:15px}.form-section-title small{color:var(--muted);font-size:11px}.segmented{background:#e9ece7;border-radius:14px;grid-template-columns:repeat(4,1fr);padding:4px;display:grid}.segmented button{color:#67716e;text-transform:capitalize;cursor:pointer;background:0 0;border:0;border-radius:11px;min-height:44px;font-size:11px}.segmented button[aria-pressed=true]{color:var(--paper);background:var(--forest);box-shadow:0 6px 15px #173f3a2b}.radio-cards{border:0;grid-template-columns:repeat(2,1fr);gap:10px;margin:24px 0 0;padding:0;display:grid}.radio-cards legend{color:var(--muted);margin-bottom:9px;font-size:10px}.radio-cards label{cursor:pointer;border:1px solid #d7dcd7;border-radius:13px;align-items:start;gap:11px;min-height:76px;padding:15px;display:flex}.radio-cards label.selected{border-color:var(--forest);background:#f1f6f1}.radio-cards input{accent-color:var(--forest);margin-top:3px}.radio-cards span{gap:5px;display:grid}.radio-cards strong{font-size:12px}.radio-cards small{color:var(--muted);font-size:10px;line-height:1.35}.field-grid{gap:13px;margin-top:20px;display:grid}.two-up{grid-template-columns:repeat(2,1fr)}.three-up{grid-template-columns:1fr 1.1fr 1fr}.field-grid label{gap:7px;display:grid}.field-grid label>span{color:#56635f;font-size:10px;font-weight:650}.field-grid input,.field-grid select{width:100%;min-width:0;height:48px;color:var(--ink);background:#fffefa;border:1px solid #cbd3cd;border-radius:10px;outline:0;padding:0 13px;font-size:13px}.field-grid input:focus,.field-grid select:focus{border-color:var(--forest);box-shadow:0 0 0 3px #bceadf8c}.select-grid{margin-top:0}.savings-details{border-bottom:1px solid #d9ded9}.savings-details summary{cursor:pointer;grid-template-columns:29px 1fr auto auto;align-items:center;gap:14px;padding:23px 34px;list-style:none;display:grid}.savings-details summary::-webkit-details-marker{display:none}.savings-details summary>span{width:29px;height:29px;color:var(--forest);background:#e4e9e4;border-radius:50%;place-items:center;font-size:9px;font-weight:800;display:grid}.savings-details summary strong{font-size:13px}.savings-details summary small{color:var(--muted);text-transform:uppercase;font-size:9px}.savings-details summary b{color:var(--forest);font-size:20px;transition:transform .2s}.savings-details[open] summary b{transform:rotate(45deg)}.savings-fields{padding:0 34px 30px}.calculate-button{width:calc(100% - 68px);color:var(--paper);background:var(--coral);cursor:pointer;border:0;border-radius:999px;justify-content:space-between;align-items:center;margin:28px 34px;padding:17px 18px 17px 22px;font-size:13px;font-weight:750;display:flex;box-shadow:0 10px 24px #ff745c40}.calculate-button b{width:34px;height:34px;color:var(--coral);background:var(--paper);border-radius:50%;place-items:center;font-size:18px;display:grid}.calculate-button:disabled{opacity:.45;cursor:not-allowed}.form-error{color:#a33b2a;margin:-15px 34px 24px;font-size:11px}.result-card{color:var(--paper);background:var(--forest);border-radius:21px;outline:0;margin:0 18px 18px;overflow:hidden}.result-card:focus-visible{box-shadow:0 0 0 4px var(--lime)}.print-card-header,.print-card-footer{display:none}.result-topline{border-bottom:1px solid #ffffff26;justify-content:space-between;gap:20px;padding:15px 20px;display:flex}.result-topline span{color:var(--lime);letter-spacing:.09em;text-transform:uppercase;font-size:9px;font-weight:800}.result-topline small{color:#93ada7;font-size:9px}.result-hero{grid-template-columns:210px 1fr;align-items:center;gap:27px;padding:30px 26px;display:grid}.dose-dial{background:conic-gradient(var(--lime) var(--fill), #ffffff1c 0);border-radius:50%;place-items:center;width:205px;height:205px;display:grid;transform:rotate(-9deg)}.dose-dial:before{content:"";background:var(--forest-deep);border-radius:50%;width:172px;height:172px;position:absolute}.dose-dial>div{z-index:1;text-align:center;place-items:center;max-width:145px;display:grid;position:relative;transform:rotate(9deg)}.dose-dial small{color:#9fb4af;text-transform:uppercase;font-size:9px}.dose-dial strong{margin-top:8px;font-family:Georgia,Times New Roman,serif;font-size:24px;font-weight:400;line-height:1}.dose-dial span{color:var(--mint);margin-top:9px;font-size:9px;line-height:1.3}.result-copy .eyebrow{color:var(--mint);letter-spacing:.1em;text-transform:uppercase;font-size:9px}.result-copy h3{letter-spacing:-.04em;margin:13px 0 12px;font-family:Georgia,Times New Roman,serif;font-size:40px;font-weight:400;line-height:1}.result-copy p{color:#b8cac5;margin:0;font-size:11px;line-height:1.55}.result-copy p strong{color:var(--paper)}.factor-row{border-top:1px solid #ffffff26;border-bottom:1px solid #ffffff26;grid-template-columns:repeat(3,1fr);display:grid}.factor-row div{border-right:1px solid #ffffff26;gap:5px;padding:15px 18px;display:grid}.factor-row div:last-child{border-right:0}.factor-row span{color:#88a39d;text-transform:uppercase;font-size:8px}.factor-row strong{color:var(--lime);font-size:18px}.factor-row small{color:#b4c5c1;text-transform:capitalize;font-size:9px}.conversion-grid{grid-template-columns:repeat(3,1fr);display:grid}.conversion-grid div{border-bottom:1px solid #ffffff21;border-right:1px solid #ffffff21;min-height:85px;padding:15px 18px}.conversion-grid div:nth-child(3n){border-right:0}.conversion-grid span{color:#89a39d;text-transform:uppercase;font-size:8px;display:block}.conversion-grid strong{margin-top:10px;font-size:12px;line-height:1.4;display:block}.conversion-grid .saving-cell{color:var(--forest-deep);background:var(--lime)}.conversion-grid .saving-cell span{color:#557245}.washer-note{background:var(--forest-deep);grid-template-columns:100px 1fr;gap:18px;padding:18px 20px;display:grid}.washer-note span{color:var(--coral);text-transform:uppercase;font-size:8px;font-weight:800}.washer-note p{color:#aebfba;margin:0;font-size:10px;line-height:1.5}.result-actions{background:var(--forest-deep);grid-template-columns:repeat(3,1fr);gap:8px;padding:14px;display:grid}.result-actions button{min-height:42px;color:var(--paper);cursor:pointer;background:0 0;border:1px solid #ffffff2e;border-radius:9px;padding:8px;font-size:9px}.result-actions button:hover{color:var(--forest-deep);background:var(--mint)}.principle-strip{color:var(--paper);background:#43635e;grid-template-columns:repeat(3,1fr);gap:1px;padding:1px 0;display:grid}.principle-strip div{background:var(--forest-deep);min-height:128px;padding:27px 5vw}.principle-strip span{color:var(--coral);text-transform:uppercase;font-size:9px}.principle-strip strong{max-width:260px;margin-top:18px;font-family:Georgia,Times New Roman,serif;font-size:20px;font-weight:400;line-height:1.2;display:block}.method-section{background:var(--paper);padding:110px 5vw 120px}.section-heading{grid-template-columns:.55fr 1.45fr;align-items:start;gap:6vw;display:grid}.section-heading h2{max-width:900px;margin-top:0}.section-heading div>p{max-width:650px;color:var(--muted);font-size:17px;line-height:1.65}.method-grid{border:1px solid var(--line);background:var(--line);grid-template-columns:repeat(3,1fr);gap:1px;margin-top:78px;display:grid}.method-grid article{background:var(--paper);min-height:330px;padding:28px}.method-grid article>span{border:1px solid var(--forest);width:38px;height:38px;color:var(--forest);border-radius:50%;place-items:center;font-size:11px;display:grid}.method-grid h3{letter-spacing:-.035em;margin:70px 0 16px;font-family:Georgia,Times New Roman,serif;font-size:28px;font-weight:400}.method-grid p{color:var(--muted);margin:0;font-size:13px;line-height:1.65}.formula-card{color:var(--paper);background:var(--forest);margin-top:26px;padding:30px}.formula-card>div{flex-wrap:wrap;align-items:center;gap:18px;display:flex}.formula-card span{width:100%;color:var(--mint);letter-spacing:.1em;text-transform:uppercase;font-size:9px}.formula-card strong{font-family:Georgia,Times New Roman,serif;font-size:clamp(25px,3vw,43px);font-weight:400}.formula-card b{color:var(--coral);font-size:20px}.formula-card p{color:#a9bdb8;max-width:780px;margin:25px 0 0;font-size:11px;line-height:1.55}.examples-section{color:var(--paper);background:var(--forest-deep);padding:110px 5vw 120px}.light-heading .section-number{color:var(--coral)}.light-heading h2{color:var(--linen)}.light-heading div>p{color:#9eb2ad}.example-grid{grid-template-columns:repeat(3,1fr);gap:16px;margin-top:70px;display:grid}.example-grid article{min-height:370px;color:var(--ink);flex-direction:column;padding:26px;display:flex}.example-soft{background:var(--mint);transform:rotate(-1.2deg)}.example-normal{background:var(--lime);transform:translateY(22px)rotate(.8deg)}.example-hard{background:var(--coral);transform:rotate(-.7deg)}.example-grid article>div{gap:8px;display:grid}.example-grid article>div span{font-size:11px;font-weight:750}.example-grid article>div b{color:#1823218c;font-size:9px}.example-grid article>strong{letter-spacing:-.07em;margin-top:auto;font-family:Georgia,Times New Roman,serif;font-size:clamp(48px,5vw,76px);font-weight:400;line-height:.9}.example-grid article>strong small{letter-spacing:0;font-size:19px}.example-grid article>p{margin:24px 0 0;font-size:12px;line-height:1.55}.measurement-section{background:var(--linen);grid-template-columns:1fr 1.15fr;gap:9vw;padding:115px 5vw;display:grid}.measurement-copy p{max-width:560px;color:var(--muted);font-size:16px;line-height:1.65}.conversion-table{border-top:1px solid var(--line)}.conversion-table>div{border-bottom:1px solid var(--line);grid-template-columns:1fr auto;align-items:center;gap:30px;min-height:84px;display:grid}.conversion-table span{color:var(--muted);font-size:12px}.conversion-table strong{color:var(--forest);font-family:Georgia,Times New Roman,serif;font-size:26px;font-weight:400}.conversion-table .table-note strong{text-align:right;max-width:320px;font-family:inherit;font-size:11px;line-height:1.45}.hardness-section{min-height:660px;color:var(--paper);background:var(--blue);grid-template-columns:.8fr 1.2fr;align-items:center;gap:8vw;padding:90px 9vw;display:grid}.hardness-section .section-number{color:var(--lime)}.hardness-orbit{border:1px solid #ffffff73;border-radius:50%;place-items:center;width:min(36vw,470px);height:min(36vw,470px);display:grid;position:relative}.hardness-orbit:before,.hardness-orbit:after{content:"";border:1px solid #ffffff38;border-radius:50%;position:absolute}.hardness-orbit:before{inset:12%}.hardness-orbit:after{inset:28%}.hardness-orbit span{font-family:Georgia,Times New Roman,serif;font-size:clamp(50px,6vw,92px)}.hardness-orbit i{background:var(--lime);border-radius:50%;width:21px;height:21px;display:block;position:absolute}.hardness-orbit i:nth-child(2){top:9%;left:25%}.hardness-orbit i:nth-child(3){background:var(--coral);bottom:27%;right:7%}.hardness-section>div:last-child>p{color:#c5d5fb;max-width:610px;font-size:17px;line-height:1.65}.hardness-section ul{border-top:1px solid #ffffff47;margin:35px 0 0;padding:0;list-style:none}.hardness-section li{border-bottom:1px solid #ffffff47;grid-template-columns:120px 1fr;gap:28px;padding:18px 0;display:grid}.hardness-section li strong{color:var(--lime);font-size:12px}.hardness-section li span{color:#c5d5fb;font-size:12px;line-height:1.5}.faq-section{background:var(--paper);grid-template-columns:.75fr 1.25fr;gap:8vw;padding:115px 5vw;display:grid}.faq-heading{align-self:start;position:sticky;top:120px}.faq-list{border-top:1px solid var(--line)}.faq-list details{border-bottom:1px solid var(--line)}.faq-list summary{cursor:pointer;grid-template-columns:40px 1fr auto;align-items:center;gap:15px;min-height:88px;list-style:none;display:grid}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary span{color:var(--coral);font-size:9px}.faq-list summary strong{font-family:Georgia,Times New Roman,serif;font-size:20px;font-weight:400}.faq-list summary b{font-size:22px;transition:transform .2s}.faq-list details[open] summary b{transform:rotate(45deg)}.faq-list details p{color:var(--muted);margin:-4px 40px 27px 55px;font-size:13px;line-height:1.65}.sources-section{background:var(--linen);grid-template-columns:1fr 1.1fr;gap:9vw;padding:110px 5vw;display:grid}.sources-section>div:first-child>p{max-width:580px;color:var(--muted);font-size:14px;line-height:1.65}.source-list{border-top:1px solid var(--line)}.source-list a{border-bottom:1px solid var(--line);grid-template-columns:35px 1fr auto;align-items:center;gap:15px;min-height:67px;text-decoration:none;display:grid}.source-list a:hover strong{color:var(--blue)}.source-list span{color:var(--coral);font-size:9px}.source-list strong{font-size:11px}.source-list b{color:var(--blue)}.final-cta{text-align:center;min-height:560px;color:var(--paper);background:var(--forest);place-items:center;padding:70px 5vw;display:grid}.final-cta>span{color:var(--mint);letter-spacing:.12em;text-transform:uppercase;font-size:10px}.final-cta h2{margin:15px 0 38px;font-size:clamp(67px,9vw,135px)}.final-cta a{color:var(--forest-deep);background:var(--lime);border-radius:999px;align-items:center;gap:20px;padding:12px 13px 12px 22px;font-size:12px;font-weight:750;text-decoration:none;display:flex}.final-cta a b{width:31px;height:31px;color:var(--paper);background:var(--forest);border-radius:50%;place-items:center;display:grid}.site-footer{min-height:135px;color:var(--paper);background:var(--forest-deep);grid-template-columns:1fr 1.3fr 1fr;align-items:center;gap:30px;padding:26px 4vw;display:grid}.footer-mark>span{color:var(--forest-deep);background:var(--mint)}.site-footer p{color:#8fa49f;text-align:center;margin:0;font-size:9px;line-height:1.5}.site-footer>div{flex-wrap:wrap;justify-self:end;gap:19px;display:flex}.site-footer>div a{color:#a6bab5;font-size:10px;text-decoration:none}.policy-page{background:var(--paper);min-height:100vh;padding:30px 5vw 100px}.policy-nav{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding-bottom:25px;display:flex}.policy-nav>a:last-child{color:var(--forest);font-size:11px}.policy-content{max-width:820px;margin:90px auto 0}.policy-content>span{color:var(--coral);text-transform:uppercase;font-size:10px}.policy-content h1{letter-spacing:-.06em;margin:25px 0 35px;font-family:Georgia,Times New Roman,serif;font-size:clamp(55px,8vw,105px);font-weight:400;line-height:.92}.policy-content h2{color:var(--forest);margin:44px 0 13px;font-family:Georgia,Times New Roman,serif;font-size:28px;font-weight:400}.policy-content p,.policy-content li{color:var(--muted);font-size:14px;line-height:1.75}.policy-content a{color:var(--blue)}.policy-content .policy-date{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:15px 0;font-size:11px}@media (width<=980px){.site-nav{grid-template-columns:1fr auto}.nav-links{display:none}.hero{min-height:690px}.calculator-section,.measurement-section,.hardness-section,.faq-section,.sources-section{grid-template-columns:1fr}.calculator-intro,.faq-heading{position:static}.calculator-section{gap:55px}.calculator-intro>p{max-width:720px}.method-grid,.example-grid{grid-template-columns:1fr}.method-grid article{min-height:260px}.method-grid h3{margin-top:45px}.example-grid article{min-height:290px;transform:none}.hardness-orbit{width:min(70vw,480px);height:min(70vw,480px);margin:0 auto}.hardness-section{padding:90px 8vw}.site-footer{grid-template-columns:1fr auto}.site-footer p{display:none}}@media (width<=680px){.site-nav{min-height:64px;padding:0 18px}.nav-cta{padding-left:14px;font-size:9px}.nav-cta span{display:none}.hero{grid-template-columns:1fr;min-height:720px;padding:65px 20px 35px}.hero-kicker{align-items:start;gap:12px}.hero-kicker b{text-align:right;max-width:110px}.hero h1{margin:62px 0 35px;font-size:clamp(59px,18vw,93px)}.hero-copy>p{font-size:17px}.hero-proof{grid-template-columns:1fr;padding-top:55px}.hero-proof div,.hero-proof div+div{border-left:0;padding:10px 0}.hero-scroll{display:none}.calculator-section,.method-section,.examples-section,.measurement-section,.faq-section,.sources-section{padding:75px 18px 82px}.calculator-intro h2,.section-heading h2,.measurement-copy h2,.hardness-section h2,.faq-heading h2,.sources-section h2{font-size:49px}.intro-note{margin-top:34px}.calculator-shell{border-radius:19px}.calculator-head,.form-section{padding:24px 19px}.calculator-head h2{font-size:27px}.segmented{grid-template-columns:repeat(2,1fr);gap:3px}.radio-cards,.two-up,.three-up{grid-template-columns:1fr}.savings-details summary{padding:21px 19px}.savings-fields{padding:0 19px 25px}.calculate-button{width:calc(100% - 38px);margin:23px 19px}.result-card{margin:0 9px 9px}.result-topline{display:grid}.result-hero{grid-template-columns:1fr;justify-items:center;padding:26px 18px}.result-copy{text-align:center}.factor-row{grid-template-columns:repeat(3,1fr)}.factor-row div{padding:12px 10px}.conversion-grid{grid-template-columns:1fr}.conversion-grid div,.conversion-grid div:nth-child(3n){border-right:0}.washer-note,.result-actions,.principle-strip{grid-template-columns:1fr}.principle-strip div{min-height:110px;padding:23px 20px}.section-heading{grid-template-columns:1fr}.section-heading .section-number{margin-bottom:27px}.method-grid{margin-top:45px}.formula-card>div{gap:10px;display:grid}.formula-card b{transform-origin:0;transform:rotate(90deg)}.example-grid{margin-top:45px}.example-grid article>strong{font-size:58px}.conversion-table>div{min-height:72px}.conversion-table strong{font-size:21px}.hardness-section{min-height:0;padding:75px 20px 85px}.hardness-orbit{width:76vw;height:76vw}.hardness-section li{grid-template-columns:90px 1fr}.faq-list summary{grid-template-columns:30px 1fr auto}.faq-list summary strong{font-size:18px}.faq-list details p{margin-left:45px}.final-cta{min-height:470px;padding:65px 20px}.final-cta h2{font-size:69px}.site-footer{grid-template-columns:1fr;padding:34px 20px}.site-footer>div{justify-self:start}.policy-page{padding:20px 18px 80px}.policy-content{margin-top:60px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}@page{margin:.45in}@media print{html,body{background:#fff!important}body{-webkit-print-color-adjust:exact;print-color-adjust:exact}main>:not(.calculator-section),.calculator-intro,.calculator-head,.form-section,.savings-details,.calculate-button,.form-error{display:none!important}.calculator-section{padding:0;display:block;background:#fff!important}.calculator-shell{box-shadow:none;border:0;border-radius:0;overflow:visible;background:#fff!important}.result-card{break-inside:avoid;color:#111;background:#fff;border:1px solid #9aa6a2;border-radius:14px;width:100%;margin:0;overflow:visible;display:block!important}.print-card-header{border-bottom:2px solid #173f3a;gap:5px;padding:18px 20px;display:grid}.print-card-header span,.print-card-footer span{color:#173f3a;letter-spacing:.08em;text-transform:uppercase;font-size:8pt;font-weight:800}.print-card-header strong{font-family:Georgia,Times New Roman,serif;font-size:23pt;font-weight:400}.print-card-header p,.print-card-footer p{color:#45514e;margin:0;font-size:8pt;line-height:1.4}.result-topline,.factor-row,.conversion-grid,.washer-note{color:#111;background:#fff;border-color:#bbb}.result-hero{grid-template-columns:180px 1fr;padding:20px}.dose-dial{background:#fff;border:10px solid #173f3a;width:172px;height:172px}.dose-dial:before{background:#fff;width:148px;height:148px}.result-actions{display:none!important}.print-card-footer{border-top:1px solid #bbb;justify-content:space-between;align-items:start;gap:25px;padding:16px 20px;display:flex}.print-card-footer p{text-align:right;max-width:390px}.result-copy p,.washer-note p,.factor-row small,.result-topline small{color:#333}.result-copy p strong,.dose-dial strong,.dose-dial span{color:#111}}