/* CleanAir1 — static rebuild of the Squarespace site */
@font-face{font-family:"Rufina";font-weight:400;font-display:swap;src:url(/fonts/rufina-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"Rufina";font-weight:700;font-display:swap;src:url(/fonts/rufina-latin-700-normal.woff2) format("woff2")}
@font-face{font-family:"PT Sans";font-weight:400;font-display:swap;src:url(/fonts/pt-sans-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"PT Sans";font-weight:700;font-display:swap;src:url(/fonts/pt-sans-latin-700-normal.woff2) format("woff2")}

@font-face{font-family:"Alegreya Sans";font-weight:400;font-display:swap;src:url(/fonts/alegreya-sans-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"Alegreya Sans";font-weight:400;font-style:italic;font-display:swap;src:url(/fonts/alegreya-sans-latin-400-italic.woff2) format("woff2")}
@font-face{font-family:"Alegreya Sans";font-weight:500;font-display:swap;src:url(/fonts/alegreya-sans-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"Alegreya Sans";font-weight:500;font-style:italic;font-display:swap;src:url(/fonts/alegreya-sans-latin-500-italic.woff2) format("woff2")}
@font-face{font-family:"Alegreya Sans";font-weight:700;font-display:swap;src:url(/fonts/alegreya-sans-latin-700-normal.woff2) format("woff2")}
@font-face{font-family:"Alegreya Sans";font-weight:700;font-style:italic;font-display:swap;src:url(/fonts/alegreya-sans-latin-700-italic.woff2) format("woff2")}
:root{
  --black:#373838; --white:#fff;
  --blue:#489dd2;      /* dark accent */
  --orange:#f39c24;    /* light accent */
  --green:#a8c429;     /* accent */
  --grey:#d6d6d6;
  --sqs-site-gutter:4vw; --sqs-mobile-site-gutter:6vw; --sqs-site-max-width:1200px;
  --body-font:"Alegreya Sans",system-ui,sans-serif;
  --head-font:"Rufina",Georgia,serif;
  --btn-font:"PT Sans",system-ui,sans-serif;
  --text:var(--black); --heading:var(--black); --link:#000; --bg:var(--white);
  --btn-bg:var(--black); --btn-text:var(--white);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--white);color:var(--black);font-family:var(--body-font);font-weight:500;font-size:16px;letter-spacing:.02em;-webkit-font-smoothing:antialiased}
img{max-width:100%}
a{color:inherit;text-decoration:none}
.sqs-html-content a,.cl-form a,.summary-excerpt a,.blog-excerpt a{color:var(--link)}
.sqs-html-content a:hover{opacity:.7}

/* ---------- typography ---------- */
h1,h2,h3,h4{font-family:var(--head-font);font-weight:700;color:var(--heading);margin:0 0 .5em;letter-spacing:.03em}
h1{font-size:calc(1.47rem + 3.39vw);line-height:.95}
h2{font-size:calc(1.26rem + 1.91vw);line-height:1.01}
h3{font-size:calc(1.2rem + 1.13vw);line-height:1.05}
h4{font-size:calc(1.1rem + .57vw);line-height:1.07}
p,li{font-size:calc(1rem + .14vw);line-height:1.3;color:var(--text);margin:0 0 1em}
pre{font-family:inherit;font-size:1rem;white-space:pre-wrap;margin:0 0 1em;color:var(--text)}
code{font-family:inherit}
p.sqsrte-large,.sqsrte-large{font-size:calc(1.04rem + .3vw);line-height:1.3}
p.sqsrte-small,.sqsrte-small{font-size:calc(.9rem + .11vw);line-height:1.3}
.sqs-html-content>*:last-child{margin-bottom:0}
.sqs-html-content ul,.sqs-html-content ol{padding-left:1.4em;margin:0 0 1em}
.sqs-html-content li p{margin:0 0 .3em}
strong{font-weight:700}
hr{border:0;border-top:1px solid currentColor;opacity:.4}

/* text colour classes used by the Squarespace editor */
.sqsrte-text-color--white{color:#fff}
.sqsrte-text-color--black{color:var(--black)}
.sqsrte-text-color--accent{color:var(--green)}
.sqsrte-text-color--darkAccent{color:var(--blue)}
.sqsrte-text-color--lightAccent{color:var(--orange)}
.sqsrte-text-color--lightest{color:#fff}
.sqsrte-text-color--darkest{color:var(--black)}
.sqsrte-text-highlight{background:var(--orange)}

/* ---------- header ---------- */
.site-header{background:var(--black);position:relative;z-index:50}
.hwrap{max-width:1500px;margin:0 auto;padding:17px 4vw;display:flex;align-items:center;gap:2rem;justify-content:space-between}
.logo img{display:block;height:auto;width:min(363px,52vw)}
.site-nav .nav-list{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;justify-content:flex-end;gap:.2rem 1.6rem}
.site-nav li{margin:0;font-size:inherit;display:flex;align-items:center}
.site-nav .has-sub{display:block}
.site-nav a,.site-nav .sub-toggle{display:block;margin:0;font-family:var(--body-font);font-weight:600;font-size:15px;letter-spacing:.1em;color:#fff;background:none;border:0;padding:4px 0;cursor:pointer;line-height:25px;transition:color .4s}
.site-nav a:hover,.site-nav .sub-toggle:hover,.site-nav .active>a,.site-nav .active>.sub-toggle,.site-nav a[aria-current]{color:var(--blue);transition-duration:.2s}
.has-sub{position:relative}
.sub{list-style:none;margin:0;padding:.6rem 0;position:absolute;left:50%;transform:translateX(-50%);top:100%;min-width:260px;background:var(--black);display:none;box-shadow:0 8px 20px rgba(0,0,0,.25)}
.sub li a{display:block;padding:.35rem 1.2rem;text-align:center;letter-spacing:.06em}
.has-sub:hover .sub,.has-sub:focus-within .sub,.has-sub.open .sub{display:block}
.menu-btn{display:none;background:none;border:0;width:44px;height:44px;padding:10px;cursor:pointer}
.menu-btn span{display:block;height:2px;background:#fff;margin:6px 0;transition:.3s}
@media (max-width:1000px){
  .menu-btn{display:block}
  .site-nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--black);padding:1rem 6vw 2rem}
  .site-nav.open{display:block}
  .site-nav .nav-list{flex-direction:column;gap:0}
  .site-nav a,.site-nav .sub-toggle{font-size:20px;display:block;padding:10px 0;text-align:left;width:100%}
  .sub{position:static;transform:none;box-shadow:none;padding:0 0 .5rem 1rem;min-width:0}
  .has-sub:hover .sub,.has-sub:focus-within .sub{display:none}
  .has-sub.open .sub{display:block}
  .sub li a{text-align:left;font-size:17px}
  .menu-btn[aria-expanded=true] span:nth-child(1){transform:translateY(8px) rotate(45deg)}
  .menu-btn[aria-expanded=true] span:nth-child(2){opacity:0}
  .menu-btn[aria-expanded=true] span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
}

/* ---------- section themes ---------- */
[data-section-theme=black]{--bg:var(--black);--text:#fff;--heading:#fff;--link:var(--green);--btn-bg:var(--green);--btn-text:#000}
[data-section-theme=black-bold]{--bg:var(--black);--text:#fff;--heading:var(--green);--link:var(--green)}
[data-section-theme=dark]{--bg:var(--blue);--text:#fff;--heading:#fff;--link:var(--green);--btn-bg:var(--green);--btn-text:#000}
[data-section-theme=dark-bold]{--bg:var(--blue);--text:#fff;--heading:var(--green);--link:var(--green)}
[data-section-theme=light]{--bg:var(--orange);--text:var(--black);--heading:var(--black);--link:#000}
[data-section-theme=light-bold]{--bg:var(--orange);--text:var(--black);--heading:#000;--link:#000}
[data-section-theme=white-bold]{--bg:var(--grey);--text:var(--black);--heading:#000;--link:#000;--btn-bg:#000;--btn-text:#fff}
[data-section-theme=bright]{--bg:var(--green);--text:#000;--heading:#000;--link:#000}
[data-section-theme=bright-inverse]{--bg:#fbfbfb;--text:var(--green);--heading:var(--green);--link:var(--green);--btn-bg:var(--green);--btn-text:#000}
[data-section-theme=white]{--bg:#fff;--text:var(--black);--heading:var(--black)}

/* ---------- page sections ---------- */
main{display:block}
.page-section{position:relative;display:flex;flex-direction:column;justify-content:center;background:var(--bg);color:var(--text);overflow:hidden}
.page-section .section-border{position:absolute;inset:0;z-index:0}
.section-background{position:absolute;inset:0;overflow:hidden;background:var(--bg)}
.section-background img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.section-background-overlay{position:absolute;inset:0;background:var(--bg)}
.page-section .content-wrapper{position:relative;z-index:1;width:100%;padding-top:3.3vw;padding-bottom:3.3vw}
.section-height--small{min-height:33vh}
.section-height--medium{min-height:66vh}
.section-height--large{min-height:100vh}
.section-height--medium .content-wrapper{padding-top:6.6vw;padding-bottom:6.6vw}
.section-height--large .content-wrapper{padding-top:10vw;padding-bottom:10vw}
.page-section .content{width:100%}
.content-wrapper>.content>div:not(.fluid-engine){max-width:1500px;margin:0 auto;padding:0 4vw}

/* ---------- fluid engine (grid placement comes from each page's inline styles) ---------- */
.fluid-engine{--sqs-site-gutter:4vw;--sqs-mobile-site-gutter:6vw}
.fe-block{position:relative;min-width:0}
.fe-block>.sqs-block{height:100%;padding:0;margin:0}
.sqs-block-content{height:100%}
.fe-block .sqs-block.html-block,.fe-block .sqs-block.markdown-block,.fe-block .sqs-block.code-block,.fe-block .sqs-block.button-block{height:auto}
.sqs-text-block-container{height:100%}

/* image blocks */
.fluid-image-component-root,.fluid-image-animation-wrapper,.fluid-image-container,.js-content-mode-element-wrapper,.js-content-mode-element{height:100%;width:100%;position:relative}
.fluid-image-container{overflow:hidden}
.fluid-image-container img{width:100%;height:100%;object-fit:var(--image-component-object-fit,cover);object-position:var(--image-component-focal-point,50% 50%)}
.image-component-container-fit .fluid-image-container img,.content-fit img{object-fit:contain}
.fluidImageOverlay{position:absolute;inset:0;pointer-events:none}
.fluid-image-container a{display:block;height:100%}

/* buttons */
.sqs-block-button-container{height:100%;display:flex;align-items:center}
.sqs-block-button-container--center{justify-content:center}
.sqs-block-button-container--right{justify-content:flex-end}
.sqs-block-button-element,.cl-button{display:inline-block;font-family:var(--btn-font);font-weight:700;font-size:calc(.85rem + .2vw);letter-spacing:.05em;line-height:1.2;padding:1em 1.8em;border:0;border-radius:0;background:var(--btn-bg);color:var(--btn-text)!important;text-decoration:none!important;cursor:pointer;transition:opacity .2s}
.sqs-block-button-element:hover,.cl-button:hover{opacity:.8}
.sqs-button-element--secondary{background:var(--blue);color:#fff!important}
.sqs-button-element--tertiary{background:var(--black);color:#fff!important}

/* lines, video, code, markdown */
.horizontalrule-block hr,.sqs-block-horizontalrule hr{margin:0;border-top-width:1px}
.intrinsic{position:relative;width:100%}
.embed-block-wrapper{position:relative;height:0;overflow:hidden}
.embed-block-wrapper iframe,.sqs-video-wrapper iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.sqs-video-wrapper{position:absolute;inset:0}
.markdown-block img{float:left;margin-right:20px;padding-bottom:20px}

/* ---------- accordions (replaces the Squarespace plug-in) ---------- */
.cl-accordion{display:flex;flex-direction:column;gap:8px}
.cl-acc-toggle{width:100%;display:flex;justify-content:space-between;align-items:center;gap:1rem;background:var(--orange);color:#fff;border:0;padding:18px 17px;font-family:var(--body-font);font-weight:600;font-size:calc(1rem + .27vw);text-align:left;cursor:pointer;box-shadow:0 1px 4px rgba(0,0,0,.18)}
.cl-acc-toggle::after{content:"";width:10px;height:10px;border-right:2px solid #202020;border-bottom:2px solid #202020;transform:rotate(45deg);transition:transform .25s;flex:none;margin-top:-5px}
.cl-acc-toggle[aria-expanded=true]::after{transform:rotate(-135deg);margin-top:5px}
.cl-acc-toggle:hover{opacity:.85}
.cl-acc-panel{padding:17px 4px}
.cl-acc-panel .page-section{background:transparent}

/* ---------- blog lists / summaries ---------- */
.blog-item-wrapper,.blog-basic-grid--container{max-width:1500px;margin:0 auto}
.blog-basic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:3rem 2rem;padding:0 4vw}
.blog-basic-grid--text .blog-title{font-family:var(--head-font);font-size:calc(1.1rem + .4vw);line-height:1.15;margin:.6em 0 .3em}
.blog-item-content-wrapper{max-width:900px;margin:0 auto;padding:4vw}
.summary-item{margin-bottom:2rem}
.summary-title{font-family:var(--head-font);font-weight:700;font-size:calc(1.05rem + .3vw)}
.summary-thumbnail img,.summary-thumbnail-container img{width:100%;height:auto;display:block}

/* ---------- forms (Netlify) ---------- */
.cl-form{display:flex;flex-direction:column;gap:1rem;font-family:var(--body-font)}
.cl-form label{display:flex;flex-direction:column;gap:.35rem;font-size:.95rem;color:var(--text)}
.cl-form label .lt{display:block}
.cl-form .frow.two{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.cl-form input,.cl-form textarea{font:inherit;font-weight:500;padding:12px;border:1px solid #a9a9a9;background:#fafafa;border-radius:0;color:#000;width:100%}
.cl-form .req{color:var(--text);opacity:.6;font-weight:400;font-size:.85em;margin-left:.3em}
.cl-form .group-title{font-size:1rem;font-weight:500;color:var(--text);margin:0 0 -.4rem}
.cl-form label{font-weight:500}
.cl-form .hp{position:absolute;left:-9999px}
.cl-form .cl-button{align-self:flex-start}

/* ---------- footer ---------- */
footer.sections .page-section .content-wrapper{padding-top:2.5vmax;padding-bottom:2.5vmax}

/* ---------- mobile ---------- */
@media (max-width:767px){
  .page-section .content-wrapper{padding-top:6vw;padding-bottom:6vw}
  .cl-form .frow.two{grid-template-columns:1fr}
}

/* ---------- testimonial slideshow (home) ---------- */
.user-items-list-banner-slideshow .slideshow-wrapper{position:relative}
.user-items-list-banner-slideshow .slides{list-style:none;margin:0;padding:0;display:grid}
.user-items-list-banner-slideshow .slide{grid-area:1/1;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:opacity .6s;margin:0}
.user-items-list-banner-slideshow .slide.is-current{opacity:1;visibility:visible}
.user-items-list-banner-slideshow .slide-content{text-align:center;padding:0 8vw}
.user-items-list-banner-slideshow .list-item-content__title{font-size:calc(1.1rem + .57vw);line-height:1.01;color:var(--heading)}
.user-items-list-banner-slideshow .list-item-content__description p{font-size:1rem;color:var(--text)}
.user-items-list-banner-slideshow .arrow-container{position:absolute;top:50%;transform:translateY(-50%);z-index:2}
.user-items-list-banner-slideshow .arrow-container--right{right:5vw;left:auto!important}
.user-items-list-banner-slideshow .arrow-container--left{left:5vw}
.user-items-list-banner-slideshow__arrow-button{background:none;border:0;cursor:pointer;padding:10px;color:#fff}
.user-items-list-banner-slideshow__arrow-icon{width:44px;height:18px;display:block}
.user-items-list-banner-slideshow__arrow-icon-path{stroke:currentColor;fill:none;stroke-width:2}
.user-items-list-banner-slideshow__arrow-icon-background{display:none}
.user-items-list-banner-slideshow .mobile-arrows{display:none}
@media (max-width:767px){.user-items-list-banner-slideshow .desktop-arrows{display:none}.user-items-list-banner-slideshow .mobile-arrows{display:flex;justify-content:center;gap:2rem;padding:1rem 0}}

/* ---------- blog list (/articles) ---------- */
.blog-basic-grid{display:grid;grid-template-columns:repeat(var(--blog-columns,2),minmax(0,1fr));column-gap:var(--blog-horizontal-spacing,60px);row-gap:var(--blog-vertical-spacing,65px);max-width:1500px;margin:0 auto;padding:0 4vw}
.blog-basic-grid--container{display:flex;flex-direction:column;margin:0}
.blog-basic-grid .image-wrapper{display:block;position:relative;aspect-ratio:3/2;overflow:hidden}
.blog-article-spacer{height:var(--blog-image-spacing,20px)}
.blog-meta-section{font-size:.9rem;margin-bottom:var(--blog-meta-spacing,10px)}
.blog-meta-secondary,.blog-meta-delimiter{display:none}
.blog-meta-primary span+time::before{content:" · "}
.blog-basic-grid .blog-title{font-family:var(--body-font);font-weight:500;font-size:calc(1.2rem + .55vw);line-height:1.2;letter-spacing:.02em;margin:0 0 var(--blog-title-spacing,12px)}
.blog-excerpt p{font-size:1rem}
.blog-more-link{display:inline-block;margin-top:var(--blog-read-more-spacing,20px);font-weight:600;border-bottom:1px solid currentColor}
@media (max-width:767px){.blog-basic-grid{grid-template-columns:1fr}}
/* blog post pages */
.blog-item-wrapper{max-width:1500px;margin:0 auto;padding:0 4vw}
.blog-item-top-wrapper{text-align:center;margin-bottom:var(--header-spacing,70px)}
.blog-item-title h1{font-size:calc(1.26rem + 1.91vw)}
.blog-item-meta-wrapper{font-size:1rem}
.blog-item-author-date-wrapper{display:flex;gap:1rem;justify-content:center}
.blog-item-content-wrapper{max-width:none;padding:0;width:var(--blog-item-custom-width,75%);margin:0 auto}
.blog-item-author-profile-wrapper,.blog-item-comments{display:none}
.item-pagination{display:flex;justify-content:space-between;gap:2rem;max-width:1500px;margin:3rem auto 0;padding:2rem 4vw;border-top:1px solid rgba(0,0,0,.15)}
.item-pagination-link{display:flex;align-items:center;gap:1rem;max-width:45%}
.item-pagination-link--next{margin-left:auto;text-align:right}
.item-pagination-icon svg{width:9px;height:16px;stroke:currentColor;stroke-width:2;display:block}
.item-pagination-prev-next{font-size:.85rem;text-transform:uppercase;letter-spacing:.1em}
.item-pagination-title{font-family:var(--body-font);font-weight:500;font-size:1.1rem;line-height:1.3;margin:.3rem 0 0}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- summary blocks (/articles-research) ---------- */
.summary-block-header{display:none}
.summary-item-list{display:flex;flex-direction:column;gap:17px}
.summary-item{display:grid;grid-template-columns:29% 1fr;gap:0 2rem;margin:0;align-items:start}
.summary-thumbnail-outer-container{position:relative}
.summary-thumbnail{aspect-ratio:1.63/1;overflow:hidden}
.summary-thumbnail img{width:100%;height:100%;object-fit:cover}
.summary-title{font-family:var(--body-font);font-weight:500;font-size:calc(1rem + 1.4vw);line-height:1.2;margin:0 0 .5rem}
.summary-block-setting-text-size-large .summary-title{font-size:min(30px,calc(1rem + 1.4vw))}
.summary-excerpt p{font-size:14px;line-height:1.5;margin:0 0 .8em}
.summary-read-more-link,.summary-metadata-container:empty{display:none}
.summary-metadata{font-size:.85rem}
@media (max-width:767px){.summary-item{grid-template-columns:1fr;gap:1rem}}

/* image blocks fill their grid cell without stretching the row */
.fe-block .sqs-block.image-block>.sqs-block-content{position:absolute;inset:0}

/* ---------- gallery grid blocks ---------- */
.sqs-gallery-block-grid .sqs-gallery{display:grid;grid-template-columns:repeat(var(--gcols,2),minmax(0,1fr));gap:20px}
.sqs-gallery-thumbnails-per-row-1{--gcols:1}.sqs-gallery-thumbnails-per-row-2{--gcols:2}.sqs-gallery-thumbnails-per-row-3{--gcols:3}.sqs-gallery-thumbnails-per-row-4{--gcols:4}.sqs-gallery-thumbnails-per-row-5{--gcols:5}
.sqs-gallery-block-grid .slide{margin:0}
.sqs-gallery-block-grid .slide a{display:block;position:relative;overflow:hidden;aspect-ratio:var(--gar,4/3);background:#f3f3f3}
.sqs-gallery-aspect-ratio-standard-vertical{--gar:3/4}.sqs-gallery-aspect-ratio-square{--gar:1/1}.sqs-gallery-aspect-ratio-standard{--gar:4/3}.sqs-gallery-aspect-ratio-widescreen{--gar:16/9}.sqs-gallery-aspect-ratio-three-two{--gar:3/2}
.sqs-gallery-block-grid .slide img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.v6-visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
@media (max-width:767px){.sqs-gallery-block-grid .sqs-gallery{grid-template-columns:repeat(min(var(--gcols,2),2),minmax(0,1fr))}}