@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;600;700;800;900&display=swap');
:root{--gold:#d6ad53;--ink:#181818;--muted:#77736b}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;color:var(--ink);font-family:'Noto Sans KR',sans-serif;font-size:16px}button,select{font:inherit}button,a,summary{touch-action:manipulation}a{color:inherit;text-decoration:none}button{cursor:pointer}button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #947025;outline-offset:5px}.wrap{width:min(1240px,calc(100% - 80px));margin:auto}.notice{background:var(--ink);color:#fff;text-align:center;padding:11px;font-size:13px}.notice span{color:#c5bfae;margin-left:28px;font-size:12px}header{height:105px;display:flex;align-items:center;justify-content:space-between;gap:32px}.logo{display:flex;align-items:center;gap:14px}.logo i{font-size:39px;font-weight:900;font-style:italic;letter-spacing:-5px;line-height:1}.logo i span{font-size:12px;vertical-align:top;letter-spacing:0;margin-left:5px}.logo b{font-size:22px;letter-spacing:-1px}.logo small{display:block;font-size:10px;letter-spacing:2px;margin-top:4px}nav{display:flex;gap:34px;font-size:14px;font-weight:600}.cart-btn{background:none;border:0;font-size:14px}.cart-btn span{display:inline-grid;place-items:center;width:24px;height:24px;background:var(--gold);border-radius:50%;margin-left:6px}.hero{background:#f5f1e8;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1fr 1fr;min-height:560px}.hero-copy{position:relative;z-index:1;padding:65px 0 30px}.eyebrow{font-size:12px;font-weight:800;letter-spacing:2px;margin:0 0 21px}h1{font-size:61px;line-height:1.22;letter-spacing:-3px;margin:0}h1 em{font-style:normal;position:relative;z-index:0}h1 em:before{content:'';position:absolute;left:-3px;right:-3px;bottom:3px;height:22px;background:var(--gold);z-index:-1}.intro{color:#6b655a;line-height:1.9;margin:25px 0 29px}.primary{display:inline-flex;align-items:center;justify-content:center;gap:30px;background:var(--ink);color:white;border:0;padding:18px 23px;font-size:14px;font-weight:700;border-radius:3px}.primary span{color:var(--gold);font-size:20px}.hero-bottom{display:flex;gap:55px;margin-top:48px;font-size:11px;font-weight:700;letter-spacing:2px}.hero-art{position:relative;display:grid;place-items:center}.bigtype{position:absolute;color:#e8dfce;font-size:126px;font-weight:900;line-height:.87;letter-spacing:-8px;left:0;top:67px}.hero-art img{height:445px;width:370px;object-fit:contain;z-index:1;filter:drop-shadow(22px 23px 18px #0003);transform:rotate(-13deg)}.art-label{position:absolute;right:0;bottom:45px;font-size:11px;letter-spacing:2px;line-height:1.6;z-index:2}.road{position:absolute;right:30px;bottom:-90px;width:100px;height:470px;background:var(--gold);transform:rotate(38deg);opacity:.8}.finder{display:grid;grid-template-columns:260px 1fr;gap:35px;padding:36px 0 42px;border-bottom:1px solid #ddd}.finder .eyebrow{font-size:10px;margin:0;color:#777}.finder h2{font-size:25px;margin:9px 0 0;line-height:1.4}.select-row{display:grid;grid-template-columns:repeat(3,1fr) 150px;gap:12px}.select-row label{display:flex;flex-direction:column;gap:8px;font-size:12px;font-weight:600}select{padding:12px;background:#fff;border:1px solid #ddd;border-radius:3px;width:100%;color:var(--ink)}.select-row .primary{align-self:end;height:50px}form p{font-size:12px;color:#777;margin:12px 0 0}.shop{padding:70px 0}.section-head{display:flex;justify-content:space-between;align-items:end}.section-head h2,.guide h2{font-size:32px;letter-spacing:-1.4px;margin:0}.section-head .eyebrow{margin-bottom:10px;color:#77736b}.section-head>span{font-size:14px;color:#77736b}.toolbar{margin-top:30px;display:flex;justify-content:space-between;gap:20px}.tabs{display:flex;gap:9px;flex-wrap:wrap}.tabs button{padding:10px 19px;border:1px solid #e4ddd0;border-radius:24px;background:#fff;font-size:14px}.tabs button.active{background:var(--ink);color:#fff;border-color:var(--ink)}.toolbar select{width:150px;font-size:13px}.result-count{font-size:12px;color:#777}.products{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.product{min-width:0}.product-image{background:#f5f3ee;position:relative;height:265px;display:grid;place-items:center;border:0;width:100%;overflow:hidden;border-radius:5px}.product-image img{width:160px;height:215px;object-fit:contain;transition:transform .3s}.product-image:hover img{transform:scale(1.06)}.badge{position:absolute;left:16px;top:15px;font-size:10px;font-weight:800;letter-spacing:1px;background:var(--gold);padding:5px 8px;border-radius:2px}.product:nth-child(2) .badge{background:#e9dfca}.product:nth-child(3) .badge{background:#e6e4df}.product .brand-name{margin:19px 0 6px;font-size:11px;color:#77736b}.product h3{font-size:19px;margin:0 0 7px;letter-spacing:-.6px}.spec{font-size:13px;color:#777;margin:0 0 13px}.price-row{display:flex;align-items:center;justify-content:space-between}.price{font-size:22px;font-weight:800;letter-spacing:-.5px}.price small{font-size:13px;font-weight:500}.add{width:34px;height:34px;background:white;border:1px solid #ddd;border-radius:50%;font-size:23px;line-height:1}.sample-note{font-size:12px;color:#888;margin-top:28px}.reset{padding:12px 20px;background:var(--gold);border:0;border-radius:4px}.brand{background:var(--ink);color:#fff;padding:70px 0}.brand-grid{display:grid;grid-template-columns:1fr 1fr;gap:80px}.brand .eyebrow{color:var(--gold)}.brand h2{font-size:39px;line-height:1.45;margin:0 0 22px;letter-spacing:-1.5px}.brand p{line-height:1.9;color:#bdb7aa;font-size:14px}.standards article{display:flex;gap:25px;padding:22px 0;border-bottom:1px solid #3d3931}.standards article>span{color:var(--gold);font-size:14px;font-weight:700}.standards h3{margin:0;font-size:20px}.standards p{margin:8px 0 0}.guide{display:grid;grid-template-columns:1fr 1.3fr;gap:60px;padding:75px 0}.guide .eyebrow{color:#77736b}details{border-bottom:1px solid #ddd;padding:19px 0}summary{cursor:pointer;font-size:16px;font-weight:600}details p{font-size:14px;line-height:1.8;color:#666}footer{background:#f4f1ea;padding:40px 0 25px}.footer-top{display:flex;justify-content:space-between;align-items:center}.footer-top p{font-size:16px;color:#77736b}.footer-top>a:last-child{font-size:14px;border-bottom:1px solid;padding-bottom:4px}.footer-bottom{display:flex;justify-content:space-between;gap:25px;border-top:1px solid #e1dace;margin-top:30px;padding-top:24px;font-size:11px;color:#777}dialog{border:0;border-radius:10px;padding:36px;width:min(550px,calc(100% - 30px));max-height:85vh;overflow:auto}dialog::backdrop{background:#0007}.close{position:absolute;right:13px;top:8px;border:0;background:none;font-size:30px}.detail-img{height:230px;width:100%;object-fit:contain;background:#f5f3ee;border-radius:5px}dialog h2{font-size:25px}dialog p{font-size:14px;line-height:1.7;color:#666}.cart-line{border-bottom:1px solid #ddd;padding:17px 0;display:flex;justify-content:space-between;gap:15px}.cart-line button{background:transparent;border:0;text-decoration:underline;font-size:12px}.cart-total{font-size:22px;font-weight:800;margin-top:22px}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);padding:15px 24px;background:var(--ink);color:white;border-radius:5px;z-index:5;opacity:0;pointer-events:none;transition:opacity .2s;font-size:14px}#toast.visible{opacity:1}@media(min-width:1500px){.hero-grid{min-height:600px}.hero-copy{padding-top:85px}.hero-art img{height:490px}}@media(max-width:950px){.wrap{width:calc(100% - 40px)}nav{gap:18px}h1{font-size:48px}.hero-art img{width:270px}.bigtype{font-size:95px}.finder{grid-template-columns:1fr}.finder h2 br{display:none}.products{grid-template-columns:repeat(2,1fr)}.brand-grid{gap:40px}.guide{gap:30px}.section-head>span{display:none}}@media(max-width:640px){.notice{font-size:11px}.notice span{display:none}header{height:auto;padding:21px 0;flex-wrap:wrap;gap:20px}.logo b{font-size:19px}.logo i{font-size:32px}nav{order:3;width:100%;justify-content:space-between;gap:10px;font-size:12px}.hero-grid{grid-template-columns:1fr}.hero-copy{padding-top:38px}h1{font-size:45px}.intro{font-size:14px}.hero-bottom{margin-top:30px}.hero-art{height:330px;margin-top:-10px}.hero-art img{height:310px;width:250px}.bigtype{left:35px;top:20px;font-size:100px}.art-label{bottom:30px}.road{height:340px}.finder{padding:28px 0}.select-row{grid-template-columns:repeat(3,1fr)}.select-row .primary{grid-column:1/-1}.shop{padding:45px 0}.section-head h2{font-size:26px}.eyebrow{font-size:10px}.toolbar{flex-direction:column}.tabs button{font-size:12px;padding:8px 12px}.toolbar select{align-self:end}.products{gap:24px 14px}.product-image{height:205px}.product-image img{width:120px;height:175px}.badge{left:9px;top:10px;font-size:9px}.product h3{font-size:16px}.price{font-size:18px}.spec{font-size:12px}.brand{padding:45px 0}.brand-grid,.guide{grid-template-columns:1fr;gap:25px}.brand h2{font-size:30px}.guide{padding:45px 0}.guide h2{font-size:26px}.footer-top{flex-wrap:wrap;gap:16px}.footer-top p{font-size:13px}.footer-bottom{flex-direction:column;gap:10px}.sample-note{line-height:1.8}}

/* Brand wordmark paired with the supplied BT logo. */
.logo b{font-family:Arial,"Noto Sans KR",sans-serif;font-weight:900;font-style:italic;letter-spacing:-1px;font-size:27px}.logo small{font-family:"Noto Sans KR",sans-serif;font-style:normal;font-weight:500;font-size:11px;letter-spacing:.2px;margin-top:7px}@media(max-width:640px){.logo b{font-size:23px}.logo small{font-size:10px}}
nav a[aria-current="page"]{box-shadow:0 3px 0 var(--gold);padding-bottom:8px}.page-heading{padding:35px 0 44px}.breadcrumb{display:flex;gap:12px;font-size:12px;color:#77736b;margin-bottom:36px}.breadcrumb a{text-decoration:underline}.page-heading h1{font-size:48px;letter-spacing:-2px;margin:0 0 18px}.page-heading>p:last-child{color:#77736b;font-size:16px;line-height:1.7}.page-heading .eyebrow{margin-bottom:12px}.subpage{min-height:65vh}.subpage .finder{padding-top:30px}.subpage .shop{padding-top:45px}.subpage .guide{padding-top:15px}.fit-guide{padding:55px 0 70px}.size-example{display:flex;justify-content:center;align-items:center;gap:25px;background:#f5f1e8;padding:45px 25px;border-radius:5px;font-size:64px;font-weight:900}.size-example i{font-size:32px;color:#77736b;font-style:normal}.size-example span{border-bottom:6px solid var(--gold)}.size-explanation{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin-top:30px}.size-explanation h2{font-size:20px}.size-explanation p{color:#77736b;font-size:14px;line-height:1.8}.story-end{padding:60px 0}.story-end h2,.guide-bottom h2{font-size:28px;letter-spacing:-1px}.story-end p:not(.eyebrow){color:#77736b;margin-bottom:28px}.guide-bottom{padding:20px 0 70px}.secondary-link{margin-left:25px;font-size:14px;text-decoration:underline}@media(max-width:640px){.page-heading{padding:24px 0 25px}.page-heading h1{font-size:35px}.breadcrumb{margin-bottom:25px}.page-heading>p:last-child{font-size:14px}.size-example{gap:16px;font-size:43px;padding:30px 15px}.size-example i{font-size:24px}.size-explanation{grid-template-columns:1fr;gap:8px}.fit-guide{padding:35px 0}.story-end h2,.guide-bottom h2{font-size:23px}.secondary-link{display:inline-block;margin:20px 0 0 20px}}
.logo{gap:12px}.logo .brand-logo{width:74px;height:74px;object-fit:contain;flex-shrink:0}.logo b{font-size:25px}.footer-top .brand-logo{width:66px;height:66px}@media(max-width:1100px){header{gap:18px}.logo .brand-logo{width:58px;height:58px}.logo b{font-size:21px}nav{gap:20px}}@media(max-width:640px){.logo .brand-logo{width:53px;height:53px}.logo b{font-size:21px}.logo small{font-size:10px}.footer-top .brand-logo{width:55px;height:55px}}
/* Center the count independently of the button's text baseline. */
.cart-btn #cart-count{display:inline-flex;align-items:center;justify-content:center;vertical-align:middle;line-height:1;text-align:center;padding:0;font-size:14px;font-weight:500;font-family:Arial,sans-serif;letter-spacing:0;flex-shrink:0}

/* BLACKTREAD brand palette: black, logo gold, silver and warm ivory. */
:root{--gold:#d6ad53;--gold-deep:#947025;--ink:#181818;--muted:#77736b;--surface:#f5f1e8;--border:#e4ddd0}
body{background:#fffefb}
.notice{background:#111;color:#f7f3e9;border-bottom:1px solid #8c6b2a}
.hero{background:linear-gradient(115deg,#f7f4ec 0%,#eee6d6 100%)}
.hero .primary,.select-row .primary{background:var(--gold);color:#181818}
.hero .primary span{color:#181818}
.primary{transition:background .2s,box-shadow .2s}
.primary:hover{background:#303030;box-shadow:0 4px 14px #0002}
.hero .primary:hover,.select-row .primary:hover{background:#e5c478;color:#181818}
.road{background:linear-gradient(180deg,#e9c66f,#b78a34);opacity:.85}
h1 em:before{background:#e8c978}
nav a:hover{color:var(--gold-deep)}
nav a[aria-current="page"]{box-shadow:0 3px 0 var(--gold-deep)}
.tabs button.active{background:var(--gold);border-color:var(--gold);color:#181818}
.tabs button:hover{border-color:var(--gold-deep)}
.badge{color:#181818}
.product:nth-child(2) .badge{background:#e9dfca}
.product:nth-child(3) .badge{background:#e6e4df}
.product-image{border:1px solid #eee8dc}
.add:hover{background:var(--gold);border-color:var(--gold)}
.brand{background:#151515;border-top:1px solid #9a7833}
.brand h2{color:#fffaf0}
.standards article>span{color:#e1bb65}
.cart-btn span{background:var(--gold);color:#181818}
select:focus{border-color:var(--gold-deep)}
.footer-top .logo{border:0;padding:0}
/* Partner inquiry shared across the storefront. */
.partnership{background:#1b1b1b;color:#fffaf0;border-top:1px solid #5c4930;padding:58px 0}
.partnership-inner{display:flex;align-items:center;justify-content:space-between;gap:40px}
.partnership-label{color:#e1bb65;font-weight:700;font-size:14px}
.partnership h2{font-size:34px;line-height:1.4;letter-spacing:-1.2px;margin:14px 0 18px}
.partnership p{font-size:14px;line-height:1.9;color:#c5bfb2;margin:0}
.partnership-button{background:var(--gold);color:var(--ink);flex-shrink:0;padding:20px 28px}
.partnership-button span{color:var(--ink)}
.partnership-button:hover{background:#e5c478}
.inquiry-form{display:grid;gap:16px;margin-top:24px}
.inquiry-form label{display:grid;gap:8px;font-size:13px;font-weight:600}
.inquiry-form input,.inquiry-form textarea{width:100%;font:inherit;font-size:14px;border:1px solid var(--border);border-radius:4px;padding:12px;background:#fffefb;color:var(--ink)}
.inquiry-form input:focus-visible,.inquiry-form textarea:focus-visible{outline:2px solid var(--gold-deep);outline-offset:2px}
.inquiry-form textarea{min-height:120px;resize:vertical}
.inquiry-form .primary{background:var(--gold);color:var(--ink)}
.inquiry-note,.inquiry-form .inquiry-status{font-size:12px;line-height:1.7;color:var(--muted)}
.inquiry-form .inquiry-status{margin:0}
@media(max-width:640px){.partnership{padding:38px 0}.partnership-inner{align-items:flex-start;flex-direction:column;gap:26px}.partnership h2{font-size:27px}.partnership p{font-size:13px}.partnership p br{display:none}.partnership-button{width:100%}}
/* Workbook catalog and browser-only admin link. */
.product h3{font-size:16px;line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:53px}
.product-image img{width:90%;height:90%;object-fit:contain;mix-blend-mode:multiply}
.product-description{white-space:pre-line}
.tabs{gap:8px;max-width:100%}
.toolbar{align-items:flex-start}.toolbar>select{flex-shrink:0}
.catalog-search-row{display:flex;gap:12px;margin-top:24px}.catalog-search-row label{flex:1}.catalog-search-row input{width:100%;font:inherit;font-size:14px;padding:12px;border:1px solid #dfd9cd;border-radius:4px;background:#fffefb}.catalog-search-row select{width:180px;font-size:13px}
.catalog-pagination{display:flex;justify-content:center;align-items:center;gap:20px;margin:36px 0 0;font-size:13px}.catalog-pagination button{padding:10px 18px;border:1px solid #dfd9cd;background:#fffefb;border-radius:4px;font-size:13px}.catalog-pagination button:disabled{opacity:.35;cursor:default}.catalog-empty{grid-column:1/-1;padding:40px 0}.admin-link{margin-right:22px;text-decoration:underline;text-underline-offset:3px}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
@media(max-width:640px){.product h3{font-size:14px;min-height:47px}.catalog-search-row{gap:8px}.catalog-search-row select{width:120px;font-size:11px}.catalog-search-row input{font-size:12px}.toolbar>select{align-self:end}.admin-link{display:inline-block;margin-right:15px}}