:root{--ink:#19313d;--muted:#526772;--line:#ccd9dc;--paper:#f7faf9;--white:#fff;--teal:#087c78;--teal-dark:#075d5a;--pale:#eaf5f3;--warn:#9a4d18;--radius:12px;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}[hidden]{display:none!important}html{scroll-behavior:smooth}body{margin:0;min-width:320px}a{color:var(--teal-dark)}a:hover{text-decoration-thickness:2px}button,input,select{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #ffba5b;outline-offset:2px}
.site-header{background:var(--white);border-bottom:1px solid var(--line)}.header-inner{max-width:1160px;margin:auto;padding:0 20px;min-height:62px;display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{text-decoration:none;color:var(--ink);font-size:20px;font-weight:800;letter-spacing:-.05em;white-space:nowrap}.brand-mark{display:inline-block;width:14px;height:14px;margin-right:7px;border:3px solid var(--teal);border-radius:50%;position:relative}.brand-mark:after{content:"";position:absolute;width:6px;height:3px;background:var(--teal);right:-5px;bottom:-3px;transform:rotate(45deg)}nav{display:flex;gap:22px;align-items:center}nav a{text-decoration:none;font-size:14px;font-weight:650;color:var(--muted)}nav a[aria-current="page"],nav a:hover{color:var(--teal-dark)}
main,.footer-inner{max-width:1160px;margin:auto;padding:0 20px}.intro{padding:30px 0 20px}.eyebrow{font-size:11px;text-transform:uppercase;letter-spacing:.14em;font-weight:800;color:var(--teal-dark);margin:0 0 9px}.intro h1{font-size:clamp(29px,4vw,44px);letter-spacing:-.045em;line-height:1.08;margin:0 0 10px;max-width:820px}.intro p:last-child{margin:0;color:var(--muted);font-size:16px;line-height:1.45;max-width:700px}
.tool-shell{background:var(--white);border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 3px 14px rgba(25,49,61,.035)}.tool-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.86fr)}.form-pane{padding:24px}.result-pane{background:#f0f7f5;border-left:1px solid var(--line);padding:24px;scroll-margin-top:12px}.pane-heading{font-size:18px;letter-spacing:-.02em;margin:0 0 17px}.field-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.project-grid{grid-template-columns:minmax(0,2fr) minmax(0,.8fr)}.field{min-width:0}.field.full{grid-column:1/-1}.field label,.field-label{display:block;font-size:13px;font-weight:700;margin-bottom:7px}.field input,.field select{width:100%;height:46px;border:1px solid #9fb3ba;border-radius:8px;background:#fff;color:var(--ink);padding:0 12px;min-width:0}.field input[aria-invalid="true"]{border-color:#bc5728}.field-hint,.field-error{font-size:12px;line-height:1.35;margin:5px 0 0;color:var(--muted)}.field-error{color:#a13f21;min-height:0}.field-error:empty{display:none}.inline-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:15px}.unit-note{font-size:12px;color:var(--muted);margin:12px 0 0}.optional{margin-top:16px;border-top:1px solid var(--line);padding-top:13px}.optional summary{font-weight:700;color:var(--teal-dark);cursor:pointer;font-size:13px}.optional .field{margin-top:12px}.primary{background:var(--teal);color:white;border:1px solid var(--teal);border-radius:8px;height:47px;padding:0 20px;font-weight:750;min-width:160px;margin-top:20px}.primary:hover{background:var(--teal-dark)}.result-eyebrow{font-size:11px;text-transform:uppercase;letter-spacing:.13em;font-weight:800;color:var(--teal-dark);margin:0 0 6px}.result-number{font-size:clamp(30px,4vw,42px);font-weight:800;letter-spacing:-.05em;line-height:1;margin:0}.result-number small{font-size:16px;letter-spacing:0;font-weight:700}.result-sub{font-size:13px;color:var(--muted);margin:8px 0 22px}.result-list{margin:0;border-top:1px solid #c7d9d6}.result-list div{display:flex;justify-content:space-between;align-items:baseline;gap:15px;border-bottom:1px solid #c7d9d6;padding:11px 0}.result-list dt{color:var(--muted);font-size:13px}.result-list dd{margin:0;font-weight:750;text-align:right;font-variant-numeric:tabular-nums}.result-list .total dt,.result-list .total dd{color:var(--ink);font-weight:800}.other-units{display:flex;flex-wrap:wrap;gap:8px 18px;padding-top:16px;font-weight:750;font-variant-numeric:tabular-nums}.mix-result{border-top:1px solid #c7d9d6;margin-top:20px;padding-top:18px}.mix-result h3{font-size:15px;margin:0 0 12px}.result-hint{font-size:12px;line-height:1.45;color:var(--muted);margin:17px 0 0}.result-warning{color:var(--warn)}.result-empty{color:var(--muted);line-height:1.5;margin:0}.ratio-box{background:#edf6f4;border-radius:10px;padding:16px 18px;margin:16px 0}.ratio-box strong{font-size:24px;letter-spacing:-.03em}.ratio-box span{display:block;color:var(--muted);font-size:12px;margin-top:3px}
.content{padding:44px 0 54px}.content h2{font-size:24px;letter-spacing:-.035em;margin:0 0 18px}.content p{line-height:1.65;color:#405761;max-width:780px}.content-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}.content section{margin-bottom:32px}.link-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.link-grid a{display:block;background:white;border:1px solid var(--line);border-radius:9px;padding:13px 15px;text-decoration:none;font-weight:700;color:var(--ink)}.link-grid a:hover{border-color:var(--teal)}.faq details{border-top:1px solid var(--line);padding:14px 0}.faq details:last-child{border-bottom:1px solid var(--line)}.faq summary{cursor:pointer;font-weight:700;line-height:1.4}.faq p{margin:10px 0 0;font-size:14px}.formula{background:white;border-left:3px solid var(--teal);padding:12px 16px;margin:14px 0;font-weight:700;color:var(--ink)}.site-footer{background:#eaf0ef;border-top:1px solid var(--line)}.footer-inner{padding-top:24px;padding-bottom:30px;color:var(--muted);font-size:12px;line-height:1.55}.footer-inner p{max-width:950px;margin:8px 0}.footer-inner a{font-weight:700}
@media(max-width:780px){.tool-grid{grid-template-columns:1fr}.result-pane{border-left:0;border-top:1px solid var(--line)}.content-grid{grid-template-columns:1fr;gap:0}.link-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:520px){.header-inner{min-height:55px;padding:0 16px}.brand{font-size:18px}nav{gap:13px}nav a{font-size:12px}nav .nav-about{display:none}main,.footer-inner{padding-left:16px;padding-right:16px}.intro{padding:22px 0 16px}.intro h1{font-size:30px}.intro p:last-child{font-size:14px}.form-pane,.result-pane{padding:18px}.field-grid{gap:12px}.field input,.field select{height:46px}.pane-heading{margin-bottom:14px}.content{padding-top:34px}.link-grid{grid-template-columns:1fr 1fr}.link-grid a{padding:12px;font-size:13px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.site-header{position:relative;z-index:2}.mobile-menu{display:none}.mobile-menu summary{list-style:none;cursor:pointer;min-width:64px;min-height:44px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:8px;color:var(--ink);font-weight:700;font-size:13px}.mobile-menu summary::-webkit-details-marker{display:none}.mobile-menu>div{position:absolute;top:55px;right:16px;width:min(260px,calc(100vw - 32px));background:var(--white);border:1px solid var(--line);border-radius:10px;box-shadow:0 12px 28px rgba(25,49,61,.14);padding:6px}.mobile-menu a{display:flex;min-height:44px;align-items:center;padding:0 12px;text-decoration:none;color:var(--ink);font-size:14px;font-weight:650;border-radius:6px}.mobile-menu a:hover,.mobile-menu a[aria-current="page"]{background:var(--pale);color:var(--teal-dark)}
.deep-option{border-top:1px solid var(--line);margin-top:16px;padding-top:14px}.optional-label{font-weight:400;color:var(--muted)}.step-heading{font-size:16px;letter-spacing:-.02em;margin:24px 0 13px;padding-top:18px;border-top:1px solid var(--line)}.floor-size-grid{grid-template-columns:1fr;margin:15px 0}.floor-two-options{margin-top:17px}.flooring-grid #floor-direct,.flooring-grid #floor-unit-price,.flooring-grid #floor-kit-price{margin-top:14px}.flooring-grid .optional{margin-top:22px}.result-group-title{font-size:14px;margin:24px 0 10px;color:var(--ink)}.flooring-grid .result-list dd{max-width:58%}
.unit-warning{color:var(--warn);font-size:13px;line-height:1.5;margin:12px 0 0}
.table-dimensions{margin-top:16px}.table-dimensions .field:last-child{grid-column:1/-1}.table-waste{margin-top:16px}.table-grid .result-list dd{max-width:58%}
@media(max-width:520px){.site-header nav{display:none}.mobile-menu{display:block}.project-grid,.floor-settings,.table-options{grid-template-columns:1fr}.flooring-grid .result-list div,.table-grid .result-list div{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:start;gap:8px}.flooring-grid .result-list dd,.table-grid .result-list dd{max-width:none}}
@media(min-width:781px){.result-pane{align-self:start}}