:root{--cc-black:#0b0b0b;--cc-dark:#171717;--cc-ink:#202020;--cc-mid:#5e5e5e;--cc-line:#d7d7d7;--cc-soft:#f3f3f3;--cc-white:#fff;--cc-blue:#1a73b8;--cc-green:#247a42;--cc-amber:#9a6500}
.bridge-circlip-tool-page .page-header,.bridge-circlip-tool-page .header-filter,.bridge-circlip-tool-page .blog-post .entry-title{display:none!important}.bridge-circlip-tool-page .main,.bridge-circlip-tool-page .blog-post,.bridge-circlip-tool-page .section,.bridge-circlip-tool-page .content{padding-top:0!important}
.btrc-circlip,.btrc-circlip *{box-sizing:border-box}.btrc-circlip{margin:0;color:var(--cc-ink);background:var(--cc-white);font-family:inherit;line-height:1.55}.btrc-circlip__shell{width:min(1240px,calc(100% - 48px));margin:auto}.btrc-circlip h1,.btrc-circlip h2,.btrc-circlip h3,.btrc-circlip p{margin-top:0}.btrc-circlip h1,.btrc-circlip h2,.btrc-circlip h3{color:inherit;font-family:inherit;font-weight:800;letter-spacing:-.028em;line-height:1.06}.btrc-circlip h1{max-width:1000px;margin-bottom:22px;font-size:clamp(3rem,7vw,6.3rem);text-transform:uppercase}.btrc-circlip h2{margin-bottom:16px;font-size:clamp(1.8rem,3.5vw,3.1rem)}.btrc-circlip h3{margin-bottom:10px;font-size:1.25rem}.btrc-circlip__kicker,.btrc-circlip__eyebrow{margin-bottom:12px;font-size:.76rem;font-weight:800;letter-spacing:.17em;text-transform:uppercase}.btrc-circlip__kicker{color:var(--cc-mid)}.btrc-circlip__kicker--light,.btrc-circlip__eyebrow{color:rgba(255,255,255,.65)}
.btrc-circlip__hero{position:relative;overflow:hidden;padding:58px 0 70px;color:#fff;background:linear-gradient(120deg,rgba(0,0,0,.98),rgba(24,24,24,.96)),repeating-linear-gradient(90deg,transparent 0,transparent 79px,rgba(255,255,255,.04) 80px)}.btrc-circlip__hero:after{position:absolute;right:-140px;bottom:-260px;width:540px;height:540px;border:82px solid rgba(255,255,255,.035);border-radius:50%;content:""}.btrc-circlip__crumbs{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:8px;margin-bottom:46px;color:rgba(255,255,255,.58);font-size:.78rem;font-weight:700;text-transform:uppercase}.btrc-circlip__crumbs a{color:rgba(255,255,255,.75);text-decoration:none}.btrc-circlip__lead{position:relative;z-index:1;max-width:850px;margin-bottom:30px;color:rgba(255,255,255,.76);font-size:clamp(1.05rem,2vw,1.3rem)}.btrc-circlip__coverage{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:8px}.btrc-circlip__coverage span{padding:9px 12px;border:1px solid rgba(255,255,255,.24);font-size:.72rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
.btrc-circlip__section{padding:78px 0}.btrc-circlip__section--tool{background:var(--cc-soft)}.btrc-circlip__tool-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(330px,.7fr);gap:28px;align-items:start}.btrc-circlip__controls,.btrc-circlip__guide-sticky{border:1px solid var(--cc-line);background:#fff}.btrc-circlip__step{padding:34px;border-bottom:1px solid var(--cc-line)}.btrc-circlip__step:last-child{border-bottom:0}.btrc-circlip__step-heading{display:flex;gap:16px;align-items:flex-start;margin-bottom:25px}.btrc-circlip__step-heading>span{display:grid;width:38px;height:38px;flex:0 0 38px;place-items:center;color:#fff;background:#111;font-size:.72rem;font-weight:800}.btrc-circlip__step-heading p{margin-bottom:4px;color:var(--cc-mid);font-size:.72rem;font-weight:800;letter-spacing:.13em;text-transform:uppercase}.btrc-circlip__step-heading h2{margin-bottom:0;font-size:1.65rem}
.btrc-circlip__type-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.btrc-circlip__type{display:flex;min-height:205px;padding:18px;align-items:flex-start;flex-direction:column;border:1px solid var(--cc-line);color:var(--cc-ink);background:#fff;cursor:pointer;text-align:left;font:inherit;transition:.18s}.btrc-circlip__type:hover,.btrc-circlip__type.is-active{border-color:#111;box-shadow:inset 0 -4px 0 #111}.btrc-circlip__type-drawing{display:grid;width:100%;height:88px;margin-bottom:14px;place-items:center;background:var(--cc-soft)}.btrc-circlip__type-drawing svg{width:130px;height:78px;fill:none;stroke:#111;stroke-width:3;stroke-linecap:round;stroke-linejoin:round}.btrc-circlip__type-drawing svg rect:first-child{fill:#ddd;stroke:#555}.btrc-circlip__type-drawing--question{font-size:3rem;font-weight:800}.btrc-circlip__type strong{margin-bottom:5px;font-size:.96rem}.btrc-circlip__type small{color:var(--cc-mid);line-height:1.4}
.btrc-circlip__mode-tabs{display:flex;gap:0;margin-bottom:24px;border-bottom:1px solid #111}.btrc-circlip__mode-tabs button{padding:12px 17px;border:1px solid var(--cc-line);border-bottom:0;color:#111;background:#fff;cursor:pointer;font:inherit;font-size:.78rem;font-weight:800;text-transform:uppercase}.btrc-circlip__mode-tabs button+button{border-left:0}.btrc-circlip__mode-tabs button.is-active{color:#fff;background:#111;border-color:#111}.btrc-circlip__mode-panel[hidden]{display:none}.btrc-circlip__field-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.btrc-circlip__field{margin-bottom:18px}.btrc-circlip__field label{display:flex;justify-content:space-between;margin-bottom:7px;color:#111;font-size:.86rem;font-weight:800}.btrc-circlip__field label span{color:var(--cc-mid);font-size:.72rem;text-transform:uppercase}.btrc-circlip__field input{width:100%;height:52px;padding:10px 13px;border:1px solid #aaa!important;border-radius:0!important;color:#111;background:#fff;box-shadow:none!important;font:inherit;font-size:1rem}.btrc-circlip__field input:focus{outline:2px solid #111;outline-offset:1px}.btrc-circlip__field small{display:block;margin-top:6px;color:var(--cc-mid);font-size:.76rem}.btrc-circlip__error{margin:4px 0 18px;padding:12px 14px;border-left:4px solid #a22020;background:#fff1f1;color:#6d1717;font-weight:700}.btrc-circlip__form-actions{display:flex;flex-wrap:wrap;gap:10px}
.btrc-circlip__button{display:inline-flex;min-height:50px;padding:12px 18px;align-items:center;justify-content:center;border:2px solid #111;border-radius:0!important;cursor:pointer;font:inherit;font-size:.8rem;font-weight:800;letter-spacing:.05em;text-align:center;text-decoration:none!important;text-transform:uppercase}.btrc-circlip__button--primary{color:#fff!important;background:#111}.btrc-circlip__button--primary:hover{color:#fff!important;background:#292929}.btrc-circlip__button--secondary{color:#111!important;background:#fff}.btrc-circlip__button--secondary:hover{color:#fff!important;background:#111}
.btrc-circlip__guide-sticky{position:sticky;top:24px;padding:28px}.btrc-circlip__guide-sticky h2{font-size:1.75rem}.btrc-circlip__diagram{display:grid;min-height:280px;margin:22px 0;place-items:center;background:var(--cc-soft)}.btrc-circlip__diagram svg{width:100%;max-width:390px;height:auto}.btrc-circlip__diagram .part{fill:#d1d1d1;stroke:#333}.btrc-circlip__diagram .ring{fill:none;stroke:#111;stroke-width:8;stroke-linecap:round}.btrc-circlip__diagram .measure{fill:none;stroke:var(--cc-blue);stroke-width:2}.btrc-circlip__diagram text{fill:#111;font:700 12px sans-serif}.btrc-circlip__legend{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:0}.btrc-circlip__legend div{padding:10px;border:1px solid var(--cc-line)}.btrc-circlip__legend dt{font-size:.72rem;font-weight:800;text-transform:uppercase}.btrc-circlip__legend dd{margin:2px 0 0;color:var(--cc-mid);font-size:.78rem}.btrc-circlip__tip{margin-top:18px;padding:15px;border-left:4px solid #111;background:var(--cc-soft)}.btrc-circlip__tip p{margin:4px 0 0;color:var(--cc-mid);font-size:.82rem}
.btrc-circlip__results-section{background:#fff}.btrc-circlip__results-heading{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:28px}.btrc-circlip__results-heading>p{max-width:390px;color:var(--cc-mid);text-align:right}.btrc-circlip__results{display:grid;gap:14px}.btrc-circlip__result{display:grid;grid-template-columns:120px minmax(0,1fr);border:1px solid var(--cc-line);background:#fff}.btrc-circlip__result-rank{display:flex;padding:22px;align-items:center;justify-content:center;flex-direction:column;color:#fff;background:#111}.btrc-circlip__result-rank span{font-size:.68rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase}.btrc-circlip__result-rank strong{font-size:2.3rem}.btrc-circlip__result-main{padding:24px}.btrc-circlip__result-top{display:flex;justify-content:space-between;gap:20px}.btrc-circlip__result-name p{margin-bottom:5px;color:var(--cc-mid);font-size:.7rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase}.btrc-circlip__result-name h3{margin-bottom:0;font-size:1.8rem}.btrc-circlip__confidence{height:max-content;padding:7px 10px;border:1px solid currentColor;font-size:.68rem;font-weight:800;text-transform:uppercase}.btrc-circlip__confidence--strong{color:var(--cc-green)}.btrc-circlip__confidence--likely{color:#26669a}.btrc-circlip__confidence--possible{color:var(--cc-amber)}.btrc-circlip__confidence--nearest{color:#777}.btrc-circlip__result-data{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:20px;background:var(--cc-line)}.btrc-circlip__result-data div{padding:12px;background:#fff}.btrc-circlip__result-data dt{color:var(--cc-mid);font-size:.66rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase}.btrc-circlip__result-data dd{margin:3px 0 0;color:#111;font-size:.88rem;font-weight:700}.btrc-circlip__result-note{margin:16px 0 0;color:var(--cc-mid);font-size:.8rem}.btrc-circlip__result-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.btrc-circlip__verification{margin:18px 0 0;padding:13px 15px;border-left:4px solid var(--cc-amber);background:#fff8e8;color:#5f450c;font-size:.82rem}
.btrc-circlip__section--how{color:#fff;background:#111}.btrc-circlip__how-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:38px;background:rgba(255,255,255,.22)}.btrc-circlip__how-grid article{min-height:230px;padding:30px;background:#111}.btrc-circlip__how-grid span{display:block;margin-bottom:38px;color:rgba(255,255,255,.42);font-size:.72rem;font-weight:800}.btrc-circlip__how-grid p{color:rgba(255,255,255,.68)}
.btrc-circlip__section--other{background:var(--cc-soft)}.btrc-circlip__other-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:start}.btrc-circlip__other-grid>div>p:not(.btrc-circlip__kicker){color:var(--cc-mid)}.btrc-circlip__other-grid ul{margin:0;padding:0;list-style:none;border-top:1px solid #111}.btrc-circlip__other-grid li{display:grid;grid-template-columns:180px 1fr;gap:18px;padding:15px 0;border-bottom:1px solid var(--cc-line)}.btrc-circlip__other-grid li span{color:var(--cc-mid)}.btrc-circlip__text-link{color:#111;font-weight:800;text-decoration:none;text-transform:uppercase}
.btrc-circlip__section--table{background:#fff}.btrc-circlip__standards{border:1px solid var(--cc-line)}.btrc-circlip__standards summary{display:flex;padding:24px;justify-content:space-between;gap:20px;cursor:pointer;font-weight:800;list-style:none}.btrc-circlip__standards summary::-webkit-details-marker{display:none}.btrc-circlip__standards summary small{color:var(--cc-mid);font-weight:600}.btrc-circlip__table-tools{display:flex;gap:10px;align-items:center;padding:18px 24px;border-top:1px solid var(--cc-line);background:var(--cc-soft)}.btrc-circlip__table-tools label{font-size:.78rem;font-weight:800;text-transform:uppercase}.btrc-circlip__table-tools input,.btrc-circlip__table-tools select{min-height:42px;padding:8px 10px;border:1px solid #aaa;border-radius:0;background:#fff}.btrc-circlip__table-tools input{min-width:260px}.btrc-circlip__table-wrap{overflow-x:auto}.btrc-circlip__table-wrap table{width:100%;border-collapse:collapse}.btrc-circlip__table-wrap th,.btrc-circlip__table-wrap td{padding:11px 13px;border-top:1px solid var(--cc-line);font-size:.78rem;text-align:left;white-space:nowrap}.btrc-circlip__table-wrap th{color:#fff;background:#111;font-size:.68rem;text-transform:uppercase}.btrc-circlip__pagination{display:flex;padding:16px 24px;align-items:center;justify-content:center;gap:15px;border-top:1px solid var(--cc-line)}.btrc-circlip__pagination button{padding:8px 12px;border:1px solid #111;background:#fff;cursor:pointer;font-weight:800}.btrc-circlip__pagination button:disabled{opacity:.35;cursor:not-allowed}
.btrc-circlip__source{padding:55px 0;color:#fff;background:#191919}.btrc-circlip__source .btrc-circlip__shell{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px}.btrc-circlip__source p{color:rgba(255,255,255,.66)}.btrc-circlip__source a{color:#fff;text-decoration:underline}
@media(max-width:980px){.btrc-circlip__tool-grid{grid-template-columns:1fr}.btrc-circlip__guide-sticky{position:static}.btrc-circlip__result-data{grid-template-columns:repeat(2,1fr)}.btrc-circlip__source .btrc-circlip__shell,.btrc-circlip__other-grid{grid-template-columns:1fr;gap:35px}}
@media(max-width:720px){.btrc-circlip__shell{width:calc(100% - 28px)}.btrc-circlip__hero{padding:42px 0 54px}.btrc-circlip__crumbs{margin-bottom:30px}.btrc-circlip__section{padding:55px 0}.btrc-circlip__type-grid,.btrc-circlip__how-grid{grid-template-columns:1fr}.btrc-circlip__type{min-height:0}.btrc-circlip__type-drawing{height:72px}.btrc-circlip__field-grid{grid-template-columns:1fr}.btrc-circlip__results-heading{align-items:flex-start;flex-direction:column}.btrc-circlip__results-heading>p{text-align:left}.btrc-circlip__result{grid-template-columns:1fr}.btrc-circlip__result-rank{padding:10px;align-items:center;justify-content:flex-start;flex-direction:row;gap:8px}.btrc-circlip__result-rank strong{font-size:1.3rem}.btrc-circlip__result-top{align-items:flex-start;flex-direction:column}.btrc-circlip__other-grid li{grid-template-columns:1fr;gap:3px}.btrc-circlip__standards summary,.btrc-circlip__table-tools{align-items:flex-start;flex-direction:column}.btrc-circlip__table-tools input{width:100%;min-width:0}.btrc-circlip__result-actions .btrc-circlip__button{width:100%}}
@media(max-width:500px){.btrc-circlip h1{font-size:clamp(2.4rem,14vw,4rem)}.btrc-circlip__step{padding:24px 19px}.btrc-circlip__mode-tabs{display:grid;grid-template-columns:1fr}.btrc-circlip__mode-tabs button+button{border-left:1px solid var(--cc-line)}.btrc-circlip__result-data{grid-template-columns:1fr}.btrc-circlip__form-actions .btrc-circlip__button{width:100%}}
@media(prefers-reduced-motion:reduce){.btrc-circlip__type,.btrc-circlip__button{transition:none}}