/* Entire interface is scoped. No external font, icon library or CDN. */
.rst-spokes{--rst-ink:#162c3a;--rst-sub:#526575;--rst-teal:#087e79;--rst-line:#d5e0e3;--rst-wash:#f3f7f7;--rst-danger:#a02b27;--rst-amber:#805515;color:var(--rst-ink);background:#fff;color-scheme:light;font:16px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;max-width:1120px;margin:24px auto;border:1px solid var(--rst-line);border-radius:18px;overflow:hidden;text-align:left;box-sizing:border-box}
.rst-spokes *{box-sizing:border-box}.rst-spokes [hidden]{display:none!important}.rst-spokes h2,.rst-spokes h3,.rst-spokes p{margin:0 0 14px;color:inherit}.rst-spokes h2{font-size:clamp(27px,4vw,44px);font-weight:760;line-height:1.1;letter-spacing:-1px}.rst-spokes h3{font-size:21px;line-height:1.25;margin-bottom:16px}.rst-spokes .rst-hero{background:var(--rst-ink);color:#fff;padding:38px 40px;display:flex;justify-content:space-between;align-items:flex-start;gap:20px}.rst-spokes .rst-hero p{color:#d5e6eb;margin-bottom:0}.rst-spokes .rst-hero h2{margin:14px 0 18px;color:#fff}.rst-spokes .rst-eyebrow{font-size:11px;letter-spacing:2px;font-weight:700}.rst-spokes .rst-version{font-size:11px;white-space:nowrap;letter-spacing:1px;border:1px solid #80949d;border-radius:20px;padding:6px 11px}.rst-spokes .rst-intro{padding:26px 32px 10px}.rst-spokes .rst-muted,.rst-spokes small{color:var(--rst-sub)}.rst-spokes .rst-panel{border:1px solid var(--rst-line);margin:20px 28px 30px;padding:26px;border-radius:12px;min-width:0;background:#fff}.rst-spokes fieldset.rst-panel legend{padding:0 10px;font-size:20px;font-weight:750;line-height:1.35;max-width:100%;color:var(--rst-ink)}.rst-spokes legend span{color:var(--rst-teal);margin-right:10px;font-size:15px;font-weight:800}.rst-spokes .rst-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 24px}.rst-spokes .rst-grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.rst-spokes .rst-field{margin-bottom:18px;min-width:0}.rst-spokes label{display:block;font-weight:650;font-size:14px;min-width:0}.rst-spokes input:not([type=checkbox]),.rst-spokes select,.rst-spokes textarea{width:100%;min-width:0;padding:11px 12px;min-height:46px;margin:6px 0 0;border:1px solid #aabac1;border-radius:7px;background:#fff;color:var(--rst-ink);font:inherit;font-size:16px;box-shadow:none;line-height:1.4}.rst-spokes textarea{resize:vertical}.rst-spokes input:focus,.rst-spokes select:focus,.rst-spokes textarea:focus,.rst-spokes button:focus-visible,.rst-spokes summary:focus-visible,.rst-spokes a:focus-visible{outline:3px solid #70b9b5;outline-offset:3px}.rst-spokes input[aria-invalid=true],.rst-spokes select[aria-invalid=true]{border:2px solid var(--rst-danger);background:#fff9f8}.rst-spokes small{display:block;font-size:12px;font-weight:400;line-height:1.5;margin:7px 0 0}.rst-spokes .rst-field-error{display:block;font-size:12px;color:var(--rst-danger);margin-top:4px}.rst-spokes .rst-check{display:flex;align-items:flex-start;gap:11px;padding:13px 0;font-weight:500;font-size:14px}.rst-spokes input[type=checkbox]{width:19px;height:19px;flex:0 0 19px;margin:2px 0 0;accent-color:var(--rst-teal)}.rst-spokes .rst-side-input{background:var(--rst-wash);padding:20px;border-radius:10px;margin-bottom:20px}.rst-spokes .rst-side-input h3{font-size:17px;border-bottom:1px solid var(--rst-line);padding-bottom:10px}.rst-spokes button,.rst-spokes a.rst-primary{display:inline-flex;align-items:center;justify-content:center;gap:12px;font:650 14px/1.3 inherit;font-family:inherit;font-size:14px;font-weight:650;padding:12px 16px;min-height:44px;border-radius:8px;border:1px solid transparent;cursor:pointer;text-decoration:none;white-space:normal;box-shadow:none;text-transform:none;letter-spacing:normal;transition:background .15s ease}.rst-spokes button:disabled{opacity:.6;cursor:wait}.rst-spokes .rst-primary{background:var(--rst-teal);color:#fff}.rst-spokes .rst-primary:hover{background:#086762;color:#fff}.rst-spokes .rst-secondary{background:#fff;border-color:#a9bec2;color:var(--rst-ink)}.rst-spokes .rst-secondary:hover{background:#eef6f5}.rst-spokes .rst-top-actions{display:flex;align-items:center;gap:16px;margin:14px 28px 28px;flex-wrap:wrap;font-size:12px;color:var(--rst-sub)}.rst-spokes details{border-top:1px solid var(--rst-line);padding:16px 0 0;margin-top:18px}.rst-spokes summary{font-weight:650;color:var(--rst-teal);cursor:pointer;padding:2px 0 10px;font-size:14px}.rst-spokes details p{font-size:14px}.rst-spokes .rst-picker{border:1px solid var(--rst-line);border-radius:8px;padding:13px 16px 3px;background:var(--rst-wash);margin:0 0 24px}.rst-spokes .rst-provenance{font-size:12px;overflow-wrap:anywhere;color:var(--rst-sub)}.rst-spokes a{color:#066b72;text-decoration:underline}.rst-spokes .rst-note{background:#edf5f4;border-left:3px solid var(--rst-teal);padding:16px 18px;margin:16px 0;font-size:14px;border-radius:0 8px 8px 0}.rst-spokes .rst-profile-panel{border:1px solid var(--rst-line);border-radius:10px;padding:22px;margin-top:16px}.rst-spokes .rst-diagram{width:100%;max-height:340px;display:block;margin:8px auto 20px;background:#fafcfc;border-radius:10px}.rst-spokes svg text{font:15px sans-serif;fill:var(--rst-ink)}.rst-spokes svg .rim{stroke:#5b7280;stroke-width:4;fill:#e8eff0}.rst-spokes svg circle.rim{fill:none}.rst-spokes svg .dash{stroke:#8b9fa9;stroke-width:1.6;stroke-dasharray:5 5;fill:none}.rst-spokes svg .measure{stroke:var(--rst-teal);stroke-width:3;fill:none}.rst-spokes svg .spoke{stroke:#cf7d36;stroke-width:3;fill:none}.rst-spokes svg .point{fill:var(--rst-teal)}.rst-spokes svg .axis{stroke:#8699a3;stroke-width:1.5;fill:none}.rst-spokes svg .flange{stroke:var(--rst-teal);stroke-width:8;fill:none}.rst-spokes svg .hole{stroke:#516979;stroke-width:2;fill:white}.rst-spokes svg .thread{stroke:var(--rst-teal);stroke-width:6;stroke-dasharray:3 3;fill:none}.rst-spokes .rst-patterns{display:grid;grid-template-columns:1fr 1fr;gap:24px}.rst-spokes figure{margin:0}.rst-spokes figcaption{text-align:center;font-size:13px;color:var(--rst-sub)}.rst-spokes .rst-patterns svg{display:block;max-width:300px;margin:auto}.rst-spokes .rst-submit{padding:0 28px 20px}.rst-spokes .rst-submit .rst-primary{min-width:300px;padding:16px 24px;font-size:17px}.rst-spokes .rst-submit p{font-size:12px;color:var(--rst-sub);margin-top:10px}.rst-spokes .rst-feedback,.rst-spokes .rst-admin-feedback{margin:0 28px}.rst-spokes .rst-alert{padding:18px;border:1px solid;border-radius:10px;margin:18px 0}.rst-spokes .rst-danger{color:#7d2421;background:#fff4f2;border-color:#e3b5ae}.rst-spokes .rst-warning{color:#684414;background:#fff9eb;border-color:#e1ce9c}.rst-spokes .rst-success{color:#15594d;background:#edf7f3;border-color:#a6cebf}.rst-spokes .rst-alert p:last-child{margin:0}.rst-spokes .rst-inline-notice{font-size:13px;color:var(--rst-amber);margin:8px 0}.rst-spokes .rst-result{margin:18px 28px 28px;outline:none}.rst-spokes .rst-result-heading{margin-bottom:20px}.rst-spokes .rst-result-heading h3{font-size:26px;margin:8px 0}.rst-spokes .rst-badge{font-size:11px;display:inline-block;padding:4px 8px;border-radius:5px;background:#e5f0ef;color:#11605c;font-weight:750;letter-spacing:.5px}.rst-spokes .rst-lengths{display:grid;grid-template-columns:1fr 1fr;gap:20px}.rst-spokes .rst-length-card{border:1px solid var(--rst-line);border-top:4px solid var(--rst-teal);border-radius:10px;padding:24px;min-width:0}.rst-spokes .rst-big{font-size:44px;line-height:1.15;font-weight:800;letter-spacing:-1px;margin:15px 0 5px}.rst-spokes .rst-big small{display:inline;font-size:19px;margin:0 0 0 6px;font-weight:450}.rst-spokes .rst-length-card p{font-size:13px}.rst-spokes .rst-table-wrap{overflow-x:auto;margin:16px 0}.rst-spokes table{width:100%;border-collapse:collapse;font-size:12px;border:0}.rst-spokes th{font-weight:700;color:var(--rst-sub);text-align:left;background:#f4f7f7}.rst-spokes td,.rst-spokes th{border:0;border-bottom:1px solid var(--rst-line);padding:10px 7px;vertical-align:top;text-align:left}.rst-spokes .rst-fit{background:#eff8f3}.rst-spokes .rst-notfit{color:var(--rst-danger)}.rst-spokes .rst-toolbar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:20px 0}.rst-spokes .rst-history-item{background:var(--rst-wash);padding:14px;margin:14px 0;border-radius:7px}.rst-spokes pre{white-space:pre-wrap;overflow-wrap:anywhere;font-size:12px;background:var(--rst-wash);padding:14px;border-radius:8px}.rst-spokes .rst-footer{background:var(--rst-wash);padding:18px 28px;font-size:11px;color:var(--rst-sub);border-top:1px solid var(--rst-line)}.rst-spokes .rst-admin-form [readonly]{background:#f4f6f6}.rst-spokes .rst-admin-form{scroll-margin-top:30px}.rst-spokes .rst-disclaimer{font-size:13px;border-top:1px solid var(--rst-line);padding-top:18px}.rst-spokes dl{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);font-size:13px;gap:7px 18px}.rst-spokes dt{color:var(--rst-sub)}.rst-spokes dd{margin:0;overflow-wrap:anywhere}
@media(max-width:750px){.rst-spokes .rst-grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.rst-spokes .rst-hero{padding:28px 24px}.rst-spokes .rst-version{display:none}.rst-spokes .rst-panel{margin:18px 18px 28px;padding:20px}.rst-spokes .rst-intro{padding:22px 20px 6px}.rst-spokes .rst-lengths{grid-template-columns:1fr}.rst-spokes .rst-result{margin:20px}.rst-spokes .rst-thread-diagram{min-height:160px}.rst-spokes .rst-admin-form .rst-grid{grid-template-columns:1fr}}
@media(max-width:520px){.rst-spokes{border-radius:10px;margin:14px 0;font-size:15px}.rst-spokes .rst-grid,.rst-spokes .rst-grid-3{grid-template-columns:1fr;gap:0}.rst-spokes .rst-panel{margin:16px 12px 26px;padding:17px 14px}.rst-spokes fieldset.rst-panel legend{font-size:17px}.rst-spokes .rst-top-actions,.rst-spokes .rst-submit,.rst-spokes .rst-result{margin-left:0;margin-right:0;padding-left:16px;padding-right:16px}.rst-spokes .rst-submit .rst-primary{min-width:0;width:100%}.rst-spokes .rst-profile-panel{padding:14px 10px}.rst-spokes .rst-feedback,.rst-spokes .rst-admin-feedback{margin:0 16px}.rst-spokes .rst-patterns{gap:8px}.rst-spokes .rst-side-input{padding:15px}.rst-spokes .rst-length-card{padding:19px 14px}.rst-spokes .rst-diagram{min-height:130px}.rst-spokes .rst-picker{padding:12px}.rst-spokes .rst-table-wrap td,.rst-spokes .rst-table-wrap th{padding:8px 5px}.rst-spokes .rst-big{font-size:39px}}
@media print{body.rst-printing *{visibility:hidden}body.rst-printing .rst-print-target,body.rst-printing .rst-print-target *{visibility:visible}body.rst-printing .rst-print-target{position:absolute;left:0;top:0;width:100%;max-width:none;border:0;margin:0;font-size:11px}body.rst-printing .rst-print-target .rst-calc-form,body.rst-printing .rst-print-target .rst-intro,body.rst-printing .rst-print-target .rst-toolbar,body.rst-printing .rst-print-target .rst-feedback,body.rst-printing .rst-print-target .rst-footer{display:none}body.rst-printing .rst-print-target details{display:block}body.rst-printing .rst-print-target details>*{display:block}body.rst-printing .rst-print-target .rst-lengths{display:block}body.rst-printing .rst-print-target .rst-length-card{break-inside:avoid;margin-bottom:12px}body.rst-printing .rst-print-target .rst-hero{padding:12px 24px}body.rst-printing .rst-print-target .rst-hero h2{font-size:24px}body.rst-printing .rst-print-target .rst-hero p{font-size:11px}}

.rst-spokes .rst-diagram-scroll{max-width:100%;overflow-x:auto;border-radius:10px}.rst-spokes .rst-diagram-tip{display:none;font-size:11px;color:var(--rst-sub)}
@media(max-width:750px){.rst-spokes .rst-diagram-scroll .rst-diagram{min-width:660px}.rst-spokes .rst-diagram-tip{display:block}}