:root{font-family:"Malgun Gothic",Arial,sans-serif;color:#173248;background:#f5f7f9;font-synthesis:none}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:wait;opacity:.65}[hidden]{display:none!important}:focus-visible{outline:3px solid #247db9;outline-offset:4px}.sr-only,.skip:not(:focus){position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.skip:focus{position:fixed;left:20px;top:10px;z-index:20000;background:#fff;padding:14px}.site-header{height:92px;max-width:1264px;margin:auto;display:flex;justify-content:space-between;align-items:center;padding:0 32px;border-bottom:1px solid #dfe5ea}.brand{display:flex;gap:12px;align-items:center}.brand>b{display:grid;place-items:center;background:#ed7928;color:#fff;width:42px;height:42px;font-size:18px}.brand>span{font-size:21px;font-weight:800}.brand small{display:block;font-size:9px;letter-spacing:1.5px;color:#798d9d;margin-top:3px}.site-header nav{display:flex;gap:26px;font-size:13px;font-weight:700}main{max-width:1264px;margin:auto;padding:44px 32px 70px}.intro{display:flex;justify-content:space-between;align-items:center;margin-bottom:34px}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:800;color:#b3622a;margin:0 0 12px}.intro h1{font-size:37px;letter-spacing:-1.7px;line-height:1.35;margin:0 0 14px;color:#142f45}.intro h1>span{color:#ee7927}.lead{color:#708393;font-size:15px;line-height:1.8;margin:0}.mobile-break{display:none}.limit-badge{display:flex;flex-direction:column;gap:3px;text-align:right;padding:12px 0 12px 24px;border-left:1px solid #dce4e9;color:#738896;font-size:11px}.limit-badge strong{color:#173248;font-size:44px;line-height:1.2;letter-spacing:-2px}.limit-badge strong span{font-size:18px;letter-spacing:0;margin-left:4px}.builder-layout{display:grid;grid-template-columns:minmax(0,1fr) 370px;gap:28px;align-items:start}.builder-fields{min-width:0}.step{background:#fff;border:1px solid #e0e6eb;border-radius:14px;padding:27px;margin-bottom:20px}.step-heading{display:flex;gap:13px;align-items:start;margin-bottom:24px}.step-heading>span{display:grid;place-items:center;border-radius:8px;width:31px;height:31px;flex-shrink:0;background:#fff1e6;color:#c86420;font-size:12px;font-weight:800}.step-heading h2{font-size:18px;letter-spacing:-.6px;margin:1px 0 7px}.step-heading p{font-size:12px;line-height:1.7;color:#7a8b98;margin:0}fieldset{border:0;padding:0;margin:0;min-width:0}legend{font-size:13px;font-weight:700;margin-bottom:12px}.product-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.product-card{display:flex;position:relative;flex-direction:column;align-items:center;min-width:0;border:1px solid #dfe6ec;border-radius:11px;padding:18px 6px 16px;text-align:center;cursor:pointer;gap:8px}.product-card:has(input:checked){border:2px solid #e5823c;background:#fffaf6;padding:17px 5px 15px}.product-card:has(input:focus-visible),.segments label:has(input:focus-visible){outline:3px solid #247db9;outline-offset:3px}.product-card input,.segments input{position:absolute;opacity:0;width:1px;height:1px}.product-card strong{font-size:15px;letter-spacing:-.6px}.product-card small{font-size:10px;color:#81909d;line-height:1.6;min-height:30px}.product-illustration{height:64px;width:100%;display:flex;align-items:center;justify-content:center}.product-illustration svg{width:100%;height:64px}.choice-mark{position:absolute;right:9px;top:8px;font-size:11px;color:#fff;background:#e5823c;width:17px;height:17px;border-radius:100%;display:none}.product-card:has(input:checked) .choice-mark{display:grid;place-items:center}.catalog-link{display:inline-block;color:#667e92;font-size:11px;border-bottom:1px solid #c3ced7;margin-top:16px;padding-bottom:2px}.option-grid,.input-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.segments{display:flex;gap:8px}.segments label{position:relative;flex:1;cursor:pointer}.segments span{border:1px solid #dce4eb;border-radius:9px;display:flex;align-items:center;justify-content:center;gap:8px;min-height:49px;font-size:14px;font-weight:700}.segments label:has(input:checked) span{border-color:#244e6c;background:#eef4f8;color:#173f5d;box-shadow:inset 0 0 0 1px #244e6c}.segments i{font-style:normal;font-size:23px;font-weight:400}.length-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;font-size:13px;font-weight:700}.length-heading b{display:inline-block;background:#edf3f8;padding:3px 7px;margin-left:4px;color:#53748e}.length-input{display:flex;align-items:center;gap:9px;color:#8394a0}input:not([type=radio]):not([type=checkbox]):not([type=range]),select,textarea{border:1px solid #d6e0e8;background:#fff;border-radius:8px;padding:12px;width:100%;color:#233f54;min-height:45px}#length-mm{width:104px;text-align:right;font-size:24px;font-weight:800;padding:8px 10px}#length-range{accent-color:#e5823c;width:100%;height:30px;margin:0;cursor:pointer}.range-ends{display:flex;justify-content:space-between;color:#90a0ac;font-size:10px}.field-help{color:#8697a3;font-size:11px;line-height:1.8;margin:10px 0 16px}.quick-lengths{display:flex;gap:7px;flex-wrap:wrap;margin:13px 0 23px}.quick-lengths button{background:#f7f9fb;border:1px solid #e0e7ed;border-radius:6px;padding:7px 10px;font-size:11px;min-height:36px;color:#698092}.quick-lengths button[aria-pressed=true]{color:#b8662c;border-color:#e4b38e;background:#fff8f0}label:not(.product-card){font-size:12px;color:#4c6579;line-height:1.7}.input-grid>label,.note-field,#custom-thread-field{display:flex;flex-direction:column;gap:7px}#custom-thread-field{margin-top:14px}.contact-step .input-grid{margin-bottom:18px}.required{color:#ca6b29}.consent{display:flex;align-items:start;gap:10px;margin:22px 0;font-size:11px!important}.consent input{accent-color:#1e4968;width:17px;height:17px;flex-shrink:0;margin-top:2px}.primary{display:flex;align-items:center;justify-content:space-between;background:#153d5a;color:#fff;border:0;padding:15px 20px;font-size:13px;font-weight:800;border-radius:8px;min-height:49px}.primary:hover{background:#235573}.submit{width:100%}.submit-note{font-size:10px;text-align:center;color:#91a0ab;margin:12px 0 0}.preview-column{position:sticky;top:25px;min-width:0}.preview-card{background:#fff;border:1px solid #dce5ec;border-radius:15px;overflow:hidden;box-shadow:0 14px 30px #1b3d5610}.preview-top{display:flex;align-items:center;justify-content:space-between;padding:24px 23px 0}.preview-top .eyebrow{font-size:9px;letter-spacing:1.4px;margin:0;color:#9aaab5}.preview-tag{font-size:9px;background:#edf3f8;color:#6f899d;border-radius:4px;padding:5px 7px}.preview-card h2{padding:0 23px;margin:15px 0 5px;font-size:21px;letter-spacing:-.6px}.diagram{background:radial-gradient(ellipse at center,#e4edf4 0,#f6f9fb 65%);margin:14px 0 0;padding:10px 6px}.diagram svg{display:block;width:100%;height:auto}.diagram-note{font-size:10px;color:#97a6b1;line-height:1.7;padding:0 22px;margin:11px 0 22px}.spec-list{margin:0 23px}.spec-list>div{display:flex;justify-content:space-between;border-bottom:1px solid #edf1f5;padding:14px 0;align-items:center}.spec-list dt{font-size:12px;color:#8a9aa7}.spec-list dd{margin:0;font-size:13px;font-weight:700}.spec-list dd strong{font-size:22px;line-height:1;color:#d67b37}.preview-cta{margin:23px 23px 12px;background:#e58036}.preview-cta:hover{background:#cb6c29}.preview-foot{font-size:10px;color:#91a2af;text-align:center;margin:12px 15px 22px}.site-footer{max-width:1200px;margin:auto;border-top:1px solid #dce4eb;padding:25px 0 80px;color:#7d91a0;display:flex;gap:20px;align-items:center;font-size:11px}.site-footer strong{font-size:15px;color:#28465c}.site-footer a{margin-left:auto}.message{background:#fff1e8;border:1px solid #edc1a2;color:#974b1d;padding:15px 20px;border-radius:9px;margin-bottom:20px;font-size:13px}.receipt{background:#fff;border:1px solid #d8e4ec;border-radius:15px;text-align:center;padding:45px 25px}.receipt-check{font-size:35px;color:#438a70}.receipt h2{font-size:23px}.receipt p{font-size:14px;color:#748a9a}.receipt button{background:#173e59;border:0;color:white;padding:13px 22px;border-radius:8px}.fastener-admin-spec{background:#f3f7fa;border:1px solid #dce6ed;padding:16px;border-radius:10px;line-height:1.8}
@media(max-width:1000px){.builder-layout{grid-template-columns:minmax(0,1fr) 310px;gap:18px}.step{padding:21px}.product-card strong{font-size:13px}.product-card small{font-size:9px}.site-header,main{padding-left:22px;padding-right:22px}.intro h1{font-size:32px}}
@media(max-width:760px){.site-header{height:75px;padding:0 18px}.brand{gap:8px}.brand>b{width:33px;height:33px;font-size:14px}.brand>span{font-size:17px}.brand small{font-size:7px;letter-spacing:1px}.site-header nav{font-size:11px;gap:15px}main{padding:29px 15px 30px}.intro{margin-bottom:23px;gap:12px}.intro h1{font-size:27px;letter-spacing:-1.4px}.intro h1>span{display:block}.eyebrow{font-size:8px;letter-spacing:1.4px;margin-bottom:10px}.lead{font-size:12px;line-height:1.8}.mobile-break{display:block}.limit-badge{padding-left:12px;font-size:9px;flex-shrink:0}.limit-badge strong{font-size:34px}.limit-badge strong span{font-size:13px}.builder-layout{display:flex;flex-direction:column;gap:0}.builder-fields,.preview-column{width:100%}.preview-column{position:static;order:-1;margin-bottom:19px}.preview-card{display:grid;grid-template-columns:43% 57%}.preview-top{grid-column:1/-1;padding:15px 16px 0}.preview-card h2{grid-column:1/-1;font-size:17px;padding:0 16px;margin:10px 0 0}.diagram{grid-column:1;grid-row:3;margin:4px 0 0;padding:0;background:radial-gradient(ellipse at center,#e4edf4,#fff)}.diagram svg{height:132px;object-fit:contain}.diagram-note{grid-column:1/-1;grid-row:4;font-size:9px;line-height:1.6;margin:0;padding:0 15px 12px}.spec-list{grid-column:2;grid-row:3;margin:7px 16px 8px 3px}.spec-list>div{padding:5px 0}.spec-list dt{font-size:10px}.spec-list dd{font-size:11px}.spec-list dd strong{font-size:18px}.preview-cta,.preview-foot{display:none}.step{padding:20px 16px;margin-bottom:15px;border-radius:12px}.step-heading{gap:10px;margin-bottom:18px}.step-heading>span{width:28px;height:28px;font-size:10px}.step-heading h2{font-size:16px}.step-heading p{font-size:10px}.product-options{gap:7px}.product-card{padding:12px 4px 10px;gap:5px}.product-card:has(input:checked){padding:11px 3px 9px}.product-card strong{font-size:13px}.product-card small{font-size:9px;min-height:28px;word-break:keep-all}.product-illustration,.product-illustration svg{height:48px}.choice-mark{width:14px;height:14px;right:5px;top:5px;font-size:9px}.option-grid{gap:13px}.segments span{min-height:45px;font-size:12px;gap:4px}.segments i{font-size:19px}.input-grid{gap:15px 12px}.quick-lengths{gap:6px}.quick-lengths button{padding:7px 9px}.site-footer{margin:0 18px;padding:23px 0 85px;flex-wrap:wrap;gap:9px 16px;font-size:10px}.site-footer a{margin-left:0}.site-footer strong{width:100%}}

/* Metric/inch thread and length selection */
.thread-picker{border-top:1px solid #e4ebf0;padding-top:23px;margin-top:20px}.thread-units{max-width:330px;margin-bottom:18px}.thread-selects{margin-top:16px}.thread-selects>label{min-width:0}.thread-picker [data-custom-field]{display:flex;flex-direction:column;gap:7px}.thread-info{font-size:12px;line-height:1.8;background:#f0f5f8;border-radius:8px;padding:12px 14px;margin-bottom:0;overflow-wrap:anywhere}.thread-picker .catalog-link{margin-top:8px}.standards-reference{font-size:11px;line-height:1.8;color:#698092;margin:17px 0 24px}.standards-reference summary{cursor:pointer}.standards-reference a{text-decoration:underline}.quantity-field{display:flex;flex-direction:column;gap:7px;max-width:300px;margin-top:22px}.length-input #length-unit{width:84px;padding:8px;font-size:12px}.spec-list dd{max-width:67%;text-align:right;overflow-wrap:anywhere}.spec-list>div{gap:8px}.spec-list dt{flex-shrink:0}.fastener-admin-spec .thread-selects{display:grid;grid-template-columns:1fr 1fr;gap:14px}.fastener-admin-spec label{display:block}.fastener-admin-spec .segments{display:flex;gap:12px}.fastener-admin-spec input[type=radio]{width:auto}.fastener-admin-spec .thread-info{color:#25445c}
@media(max-width:760px){.thread-selects{grid-template-columns:1fr;gap:15px}.thread-units{max-width:none}.length-input{gap:6px}#length-mm{width:96px}.length-heading>label{max-width:125px}.thread-info{font-size:11px}.spec-list dd{font-size:10px}.fastener-admin-spec .thread-selects{grid-template-columns:1fr}}

.fastener-check{display:flex!important;align-items:flex-start;gap:10px;padding:13px 14px;border:1px solid #dbe5ec;border-radius:9px;background:#f7fafc;margin:17px 0}.fastener-check input[type=checkbox]{width:19px;height:19px;margin:2px 0 0;flex-shrink:0;accent-color:#234e6c}.fastener-check strong{font-size:13px;color:#23465f}.fastener-check small{display:block;color:#7b8f9e;font-size:11px;line-height:1.7;margin-top:3px}.fastener-check:has(input:checked){background:#fff5e9;border-color:#e7ae7d}.special-note{font-size:12px;line-height:1.8;padding:12px;border-radius:8px;background:#fff5e9;color:#a05c2a}.limit-badge>span{max-width:170px;line-height:1.7}.left-hand-check{margin-top:21px}@media(max-width:760px){.fastener-check{padding:12px}.fastener-check strong{font-size:12px}.fastener-check small{font-size:10px}.limit-badge>span{max-width:104px}.preview-card .diagram{display:flex;align-items:center}.preview-card .diagram svg{width:100%}}

/* Product-specific requested thread length/depth; cap is a manufacturing inquiry. */
.thread-length-picker{border-top:1px solid #e4ebf0;margin-top:24px;padding-top:23px}.thread-length-picker>label{display:block;font-weight:700;margin-bottom:8px}.thread-length-picker [data-length-custom]{margin-top:15px}.thread-length-input{display:flex;align-items:center;gap:12px;margin-top:7px}.thread-length-input input{max-width:230px}.thread-length-input>span{font-size:12px;color:#758c9d}.spec-list dt{flex-shrink:1}.spec-list dd{flex-shrink:0;max-width:60%}
@media(max-width:760px){.product-options{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.product-illustration,.product-illustration svg{height:60px}.product-card small{min-height:18px}.spec-list dt{max-width:55%;font-size:9px}.spec-list dd{max-width:55%;font-size:10px}.thread-length-picker{margin-top:20px;padding-top:20px}}

/* Independent directions for external/internal or A/B thread sections. */
.thread-hand-picker{border:1px solid #dce5ec;border-radius:9px;padding:16px;margin:0 0 18px;background:#fbfcfd}.hand-selects{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.hand-selects>label{display:flex;flex-direction:column;gap:7px;min-width:0}.hand-selects select{font-size:12px}.hand-help{font-size:11px;line-height:1.8;color:#718799;margin:13px 0 0;overflow-wrap:anywhere}.hand-selects>label:only-child{grid-column:1/-1}#summary-hand{white-space:normal}
@media(max-width:760px){.thread-hand-picker{padding:13px}.hand-selects{grid-template-columns:1fr;gap:12px}.hand-help{font-size:10px}#summary-hand{font-size:9px;max-width:62%}}

/* Body dimensions use across-flats for hexagon and outside diameter for round bar. */
.body-size-picker{margin-top:23px;padding-top:20px;border-top:1px solid #e4ebf0}.body-size-picker>label{display:block;font-weight:700;margin-bottom:8px}.body-size-picker [data-body-custom]{margin-top:15px}.body-size-picker [data-body-custom] input{margin-top:7px}.body-info,.body-status{font-size:11px;line-height:1.8;color:#718799;overflow-wrap:anywhere}.body-status:empty{display:none}.body-status{color:#a56532}.body-size-picker .catalog-link{margin-top:3px}
@media(max-width:760px){.body-size-picker{margin-top:20px;padding-top:18px}.body-info,.body-status{font-size:10px}}

/* Make the existing-product link easier to read and tap, without enlarging reference links. */
#catalog-source{display:inline-flex;align-items:center;justify-content:center;min-height:44px;max-width:100%;padding:10px 16px;font-size:14px;font-weight:700;line-height:1.5;text-align:center;color:#245475;border:1px solid #cad9e4;border-radius:8px;background:#edf4f8}#catalog-source:hover{background:#e2edf5;border-color:#9eb8cb}

.joining-catalog{margin-top:20px;padding:16px;border:1px solid #d7e5ee;border-radius:10px;background:#f3f8fb}.joining-catalog>strong{font-size:13px}.joining-catalog p{font-size:11px;line-height:1.8;color:#607c90;margin:9px 0}.joining-catalog .input-grid{gap:10px}.joining-catalog button{margin-top:12px;border:1px solid #244e6c;border-radius:7px;background:#fff;color:#173f5d;min-height:44px;padding:9px 14px;font-size:12px;font-weight:700}.joining-catalog [role=status]:empty{display:none}