[hidden]{display:none!important}
.field-wide{grid-column:1/-1}
.drawing-area.separated-preview{height:410px}
.model-stage{position:absolute;inset:0}
.separated-preview .model-stage{inset:37px 0 96px}
.separated-preview .preview-controls{top:12px;bottom:auto;right:14px}
.preview-legend{position:absolute;top:14px;left:16px;display:flex;gap:15px;font-size:10px;color:var(--ink);pointer-events:none}
.preview-legend span::before{content:'';display:inline-block;width:8px;height:8px;border-radius:2px;margin-right:6px;background:#609b96}
.preview-legend .part-second::before{background:#d4a06f}
.preview-separation{position:absolute;left:15px;right:15px;bottom:12px;padding:10px 13px 8px;background:#ffffffed;border:1px solid var(--line);border-radius:5px}
.preview-separation label{display:flex;justify-content:space-between;font-size:11px;font-weight:500;gap:10px}
.preview-separation output{font-variant-numeric:tabular-nums;color:var(--teal);font-size:11px}
.preview-separation input{display:block;width:100%;margin:8px 0 5px;accent-color:var(--teal);height:17px;cursor:ew-resize;touch-action:pan-y}
.separation-hint{display:flex;justify-content:space-between;font-size:8px;color:var(--muted)}
:root{--ink:#142e38;--muted:#6c7d82;--teal:#087f83;--teal-soft:#e5f0ed;--paper:#f7f8f5;--white:#fff;--line:#dee5df;--orange:#e9a46d;--serif:Georgia,'Times New Roman',serif;--sans:'Segoe UI',Arial,sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:14px;line-height:1.5}button,input,select{font:inherit}button,a,input,select{outline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #db8b4a}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.48;cursor:not-allowed}a{color:inherit}button{color:var(--ink)}.sidebar{position:fixed;inset:0 auto 0 0;width:238px;background:var(--ink);color:#dbe7e5;padding:37px 23px;display:flex;flex-direction:column;z-index:5}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:700;font-size:18px;letter-spacing:2.2px}.brand small{display:block;font-size:9px;letter-spacing:3.4px;color:#91a9ac;margin-top:3px}.brand-mark{font:700 40px/44px var(--serif);position:relative;letter-spacing:-5px;width:43px}.brand-mark>span{font:22px var(--sans);position:absolute;right:0;top:-5px;color:var(--orange);letter-spacing:0}.nav-label{font-size:9px;letter-spacing:1.9px;font-weight:600;color:#94acb0;margin:58px 12px 14px}.sidebar nav a{display:flex;align-items:center;gap:13px;padding:12px;margin:5px 0;text-decoration:none;border-radius:6px;font-size:13px;color:#c8d8d8}.sidebar nav a:hover{background:#23424b}.sidebar nav a.active{background:#2c4a51;color:#fff}.nav-symbol{font-size:20px;line-height:1;width:22px;text-align:center}.nav-number{font-size:10px;color:#91a9ac;margin-left:auto}.nav-section{margin-top:28px;margin-bottom:13px}.sidebar-foot{margin-top:auto;font-size:11px;color:#b7c9cb;padding:15px 12px 0}.sidebar-foot small{display:block;font-size:8px;letter-spacing:1.25px;margin-top:16px;color:#7d989e}.status-dot{display:inline-block;width:6px;height:6px;background:#8cc9b5;border-radius:50%;margin-right:8px;vertical-align:2px}.shell{margin-left:238px;min-height:100vh;display:flex;flex-direction:column}.topbar{height:85px;border-bottom:1px solid var(--line);padding:0 44px;display:flex;align-items:center;justify-content:space-between;background:#fafbf8;gap:15px}.breadcrumb{font-size:12px;color:var(--muted)}.breadcrumb span{padding:0 14px;color:#a6b1b0}.breadcrumb strong{color:var(--ink);font-weight:500}.top-actions{display:flex;align-items:center;gap:24px}.unit-switch{display:flex;gap:2px;padding:3px;border:1px solid var(--line);border-radius:6px;background:#eef1ec}.unit-switch button{font-size:11px;border:0;background:transparent;padding:6px 13px;border-radius:3px;color:var(--muted)}.unit-switch button.active{background:#fff;box-shadow:0 1px 4px #182d3610;color:var(--ink)}.text-button{background:none;border:0;font-size:12px}.text-button span{margin-left:6px}.site-footer{margin-top:auto;display:flex;justify-content:space-between;padding:24px 44px;border-top:1px solid var(--line);font-size:10px;color:var(--muted)}main{padding:43px 44px 55px}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:600;color:var(--teal);margin-bottom:15px}.home-hero{position:relative;border-bottom:1px solid var(--line);padding-bottom:34px;display:flex;justify-content:space-between;align-items:center;gap:25px}.home-hero h1{font:normal clamp(36px,4vw,56px)/1.1 var(--serif);letter-spacing:-1.7px;margin:0 0 18px}.home-hero h1 em{font-style:normal;color:var(--teal)}.home-hero p{color:var(--muted);font-size:13px;line-height:1.85;margin:0;max-width:460px}.hero-dimension{height:170px;width:210px;flex-shrink:0;position:relative;display:grid;place-items:center;opacity:.9}.hero-dimension svg{height:160px;width:210px}.hero-dimension small{position:absolute;bottom:-4px;font:9px monospace;letter-spacing:1px;color:var(--muted)}.section-top{display:flex;align-items:center;justify-content:space-between;margin:32px 0 20px}.section-top h2{font-size:18px;font-weight:600;margin:0;letter-spacing:-.4px}.section-top p{font-size:11px;color:var(--muted);margin:0}.tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:19px}.tool-card{display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line);border-radius:8px;overflow:hidden;text-decoration:none;transition:transform .2s,border-color .2s,box-shadow .2s}.tool-card:hover{transform:translateY(-4px);border-color:#87afab;box-shadow:0 12px 25px #142e3808}.card-art{height:165px;background-color:#edf2ed;background-image:radial-gradient(#b7c8bf 0.65px,transparent .65px);background-size:13px 13px;position:relative;padding:24px;display:grid;place-items:center}.card-art.hirth{background-color:#f6f0e7;background-image:radial-gradient(#d8cbb6 .65px,transparent .65px)}.card-art.splines{background-color:#ecf0f1;background-image:radial-gradient(#c0ccd1 .65px,transparent .65px)}.card-art svg{width:100%;height:125px;overflow:visible}.art-index{position:absolute;left:16px;top:12px;font:10px monospace;color:#7b8d86}.art-tag{position:absolute;bottom:10px;right:13px;font-size:8px;letter-spacing:1.5px;color:var(--muted)}.card-body{padding:22px 21px 17px;flex:1;display:flex;flex-direction:column}.card-body h3{font-size:20px;letter-spacing:-.5px;margin:0 0 8px;font-weight:600}.card-body p{font-size:12px;color:var(--muted);line-height:1.8;margin:0 0 20px;min-height:64px}.card-tags{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:23px}.card-tags span{font-size:9px;padding:3px 6px;border:1px solid var(--line);border-radius:3px;color:#6a7b7c}.card-link{display:flex;justify-content:space-between;font-size:11px;font-weight:600;margin-top:auto;padding-top:13px;border-top:1px solid #edf0eb}.card-link span{font-size:18px;font-weight:400;color:var(--teal)}.workflow-panel{margin-top:28px;background:#eaf0eb;border-radius:7px;padding:23px 27px;display:flex;align-items:center;gap:22px;border:1px solid #dce5dc}.workflow-label{font-size:10px;letter-spacing:1.2px;font-weight:600;max-width:110px}.workflow-stages{display:flex;gap:16px;align-items:center;flex:1}.workflow-stages div{font-size:12px}.workflow-stages div small{display:block;font-size:10px;color:var(--muted);margin-top:2px}.workflow-stages b{font:14px var(--serif);font-weight:normal;color:#869a8e}.workflow-formats{font:11px monospace;white-space:nowrap;color:var(--teal)}.method-panel{margin-top:27px;display:grid;grid-template-columns:1fr 1fr;gap:25px}.method-panel h3{font-size:11px;font-weight:600;margin:0 0 7px}.method-panel p{font-size:11px;line-height:1.8;color:var(--muted);margin:0}.muted{color:var(--muted)}.pill{display:inline-block;background:var(--teal-soft);color:var(--teal);padding:4px 9px;border-radius:3px;font-size:9px;letter-spacing:1px;font-weight:600}.page-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px}.page-heading h1{font:normal 39px/1.1 var(--serif);letter-spacing:-1px;margin:0 0 12px}.page-heading p{font-size:12px;color:var(--muted);margin:0;max-width:640px}.page-heading .eyebrow{margin-bottom:10px}.recipe-buttons{display:flex;gap:8px;flex-shrink:0}.secondary-button{padding:9px 12px;background:white;border:1px solid var(--line);border-radius:5px;font-size:11px;white-space:nowrap}.secondary-button:hover{border-color:#7da6a2}.calculator-layout{display:grid;grid-template-columns:310px minmax(0,1fr);gap:22px;align-items:start}.panel{border:1px solid var(--line);border-radius:7px;background:var(--white);overflow:hidden}.panel-head{display:flex;align-items:center;justify-content:space-between;padding:17px 20px;border-bottom:1px solid var(--line)}.panel-head h2{font-size:13px;font-weight:600;margin:0}.panel-head>span{font:9px monospace;color:var(--muted)}.input-form{padding:16px 20px 20px}.field-group{font-size:9px;letter-spacing:1.2px;color:var(--teal);margin:22px 0 12px;font-weight:600}.field-group:first-child{margin-top:0}.field{display:block;font-size:11px;margin-bottom:14px}.field-label{display:flex;justify-content:space-between;margin-bottom:6px;gap:10px}.field-unit{color:var(--muted);font:10px monospace}.field input,.field select{border:1px solid #d8e0d9;border-radius:4px;background:#fbfcf9;color:var(--ink);width:100%;height:37px;padding:7px 10px;font-size:12px}.field input:focus,.field select:focus{border-color:var(--teal)}.field input:invalid{border-color:#bf6e55}.field-hint{font-size:9px;line-height:1.6;color:var(--muted);display:block;margin-top:5px}.form-error{font-size:11px;color:#a14f35;line-height:1.7;min-height:18px;margin:8px 0}.form-reset{width:100%;margin-top:10px}.output-column{display:flex;flex-direction:column;gap:20px;min-width:0}.preview-panel{position:relative}.view-tabs{display:flex;gap:3px}.view-tabs button{padding:5px 9px;border:0;background:none;border-radius:3px;color:var(--muted);font-size:10px}.view-tabs button.active{background:var(--teal-soft);color:var(--teal)}.drawing-area{height:300px;background-color:#f5f7f2;background-image:linear-gradient(#d8e1d240 1px,transparent 1px),linear-gradient(90deg,#d8e1d240 1px,transparent 1px);background-size:22px 22px;position:relative;overflow:hidden}.drawing-area>svg{width:100%;height:100%;display:block}.drawing-caption{display:flex;justify-content:space-between;padding:10px 18px;font-size:9px;color:var(--muted);border-top:1px solid var(--line)}.drawing-area canvas{width:100%;height:100%;display:block;touch-action:none}.preview-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#f5f7f2dd;font-size:12px;padding:30px;text-align:center}.preview-controls{position:absolute;bottom:10px;right:10px;display:flex;gap:5px}.preview-controls button{font-size:10px;background:#ffffffde;border:1px solid var(--line);border-radius:3px;padding:5px 8px}.export-panel{padding:18px 20px;display:flex;align-items:center;justify-content:space-between;gap:15px;flex-wrap:wrap}.export-info strong{font-size:12px;display:block}.export-info small{font-size:10px;color:var(--muted);display:block;margin-top:4px}.export-controls{display:flex;gap:7px;align-items:center;flex-wrap:wrap}.export-controls select{max-width:140px;background:#f7f9f5;border:1px solid var(--line);border-radius:4px;font-size:10px;padding:9px}.primary-button{background:var(--teal);border:1px solid var(--teal);color:white;border-radius:4px;font-size:11px;font-weight:600;padding:9px 14px}.primary-button:hover{background:#076c70}.export-status{display:none;padding:10px 20px;background:var(--teal-soft);color:var(--teal);font-size:11px;border-top:1px solid var(--line)}.export-status.visible{display:block}.results-table{width:100%;border-collapse:collapse;font-size:11px}.results-table td{padding:10px 20px;border-bottom:1px solid #edf0eb;vertical-align:top}.results-table tr:last-child td{border-bottom:0}.results-table td:last-child{text-align:right;font-variant-numeric:tabular-nums;font-weight:600;white-space:nowrap}.results-table td small{display:block;font:9px/1.7 monospace;color:#85918f;margin-top:3px}.result-unit{font-size:10px;font-weight:400;color:var(--muted);margin-left:4px}.warnings{padding:0 20px}.warning{font-size:11px;line-height:1.8;margin:0 0 12px;background:#fff5e6;border-left:2px solid #d9a561;padding:10px 12px;color:#7c5a32}.warning:first-child{margin-top:16px}.notes{padding:17px 20px;color:var(--muted);font-size:11px;line-height:1.85}.notes p{margin:0 0 10px}.notes p:last-child{margin:0}.notes a{color:var(--teal);text-underline-offset:3px}.notes details{padding-top:10px}.notes summary{cursor:pointer;color:var(--ink);font-weight:500;margin-bottom:8px}.notes ul{padding-left:17px}.notes li{margin-bottom:8px}#toast{position:fixed;bottom:25px;left:calc(50% + 119px);transform:translate(-50%,15px);z-index:20;background:var(--ink);color:white;box-shadow:0 4px 25px #142e3825;padding:13px 22px;border-radius:5px;font-size:12px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;max-width:90vw}#toast.show{opacity:1;transform:translate(-50%,0)}.spinner{width:14px;height:14px;border:2px solid #c1d8d4;border-top-color:var(--teal);border-radius:50%;animation:spin 1s linear infinite;display:inline-block;vertical-align:middle;margin-right:8px}@keyframes spin{to{transform:rotate(360deg)}}.login-layout{display:grid;grid-template-columns:1.05fr 1fr;min-height:100vh}.login-visual{background:var(--ink);color:#edf2ed;padding:42px 60px;position:relative;overflow:hidden;display:flex;flex-direction:column}.login-copy{margin:auto 0;position:relative;z-index:1;padding:60px 0}.login-copy .eyebrow{color:#a7cabb}.login-copy h1{font:normal clamp(45px,5vw,70px)/1.09 var(--serif);letter-spacing:-2px;margin:24px 0}.login-copy h1 em{font-weight:normal;color:#a8d2bf}.login-copy p{color:#9cb4b8;font-size:13px;line-height:1.9}.login-bottom{font-size:9px;letter-spacing:1.3px;color:#8ea7aa;position:relative;z-index:1}.login-drawing{position:absolute;width:420px;height:420px;bottom:30px;right:-200px;opacity:.22}.orbital{position:absolute;border:1px solid #a0c5b4;border-radius:50%;inset:0}.orbital-two{inset:45px;border-style:dashed}.orbital-three{inset:95px}.login-drawing:after,.login-drawing:before{content:'';position:absolute;top:50%;left:-15%;height:1px;background:#a0c5b4;width:130%;transform:rotate(-30deg)}.login-drawing:before{transform:rotate(60deg)}.login-drawing span{position:absolute;top:46%;left:30%;font:20px monospace}.login-panel{display:flex;flex-direction:column;padding:40px 55px;background:var(--paper)}.login-form-wrap{width:100%;max-width:340px;margin:auto; padding:55px 0}.login-form-wrap h2{font:normal 37px var(--serif);letter-spacing:-1px;margin:21px 0 10px}.login-form-wrap>p{font-size:12px}.login-form-wrap form{margin-top:34px}.login-form-wrap label{display:block;margin-bottom:20px;font-size:11px}.login-form-wrap input{display:block;width:100%;padding:12px;border:1px solid #d8e0d9;border-radius:4px;margin-top:8px;background:white;font-size:12px}.login-submit{width:100%;padding:12px;text-align:left;display:flex;justify-content:space-between;margin-top:10px}.login-help{font-size:10px!important;line-height:1.8;color:var(--muted);margin-top:23px}.login-panel-footer{display:flex;justify-content:space-between;font-size:9px;color:var(--muted)}.login-panel-footer span{opacity:.7}
@media(min-width:1500px){main{max-width:1500px;width:100%;margin:0 auto}.calculator-layout{grid-template-columns:350px minmax(0,1fr)}.card-art{height:200px}.card-art svg{height:145px}.drawing-area{height:365px}}
@media(max-width:1150px){.sidebar{width:200px;padding-left:16px;padding-right:16px}.shell{margin-left:200px}.topbar{padding:0 28px}main{padding:32px 28px 45px}.site-footer{padding-left:28px;padding-right:28px}.tool-grid{gap:12px}.card-body{padding:18px 16px}.card-body p{min-height:84px}.hero-dimension{width:150px}.hero-dimension svg{width:150px}.workflow-panel{padding:20px;gap:20px}.workflow-stages{gap:10px}.workflow-formats{display:none}.calculator-layout{grid-template-columns:275px minmax(0,1fr);gap:16px}.page-heading{align-items:flex-start}.recipe-buttons{flex-direction:column}.export-panel{padding:15px}#toast{left:calc(50% + 100px)}}
@media(max-width:900px){.sidebar{width:175px;padding:25px 12px}.brand{font-size:15px;gap:8px;letter-spacing:1.5px}.brand small{font-size:8px;letter-spacing:2px}.sidebar nav a{font-size:11px;padding:10px 8px;gap:8px}.nav-number{display:none}.shell{margin-left:175px}.topbar{padding:0 22px;height:74px}.top-actions{gap:15px}main{padding:28px 22px 40px}.hero-dimension{display:none}.home-hero h1{font-size:42px}.tool-grid{grid-template-columns:1fr}.tool-card{flex-direction:row}.card-art{width:165px;min-width:165px;height:auto}.card-art svg{height:115px}.card-body p{min-height:0;margin-bottom:13px}.card-body{padding:18px}.card-tags{margin-bottom:12px}.workflow-panel{flex-direction:column;align-items:flex-start;gap:15px}.workflow-label{max-width:none}.workflow-stages{width:100%;justify-content:space-between}.method-panel{grid-template-columns:1fr;gap:18px}.calculator-layout{grid-template-columns:1fr}.input-form{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}.field-group,.form-error,.form-reset{grid-column:1/-1}.field-group{margin-top:15px}.drawing-area{height:290px}.page-heading h1{font-size:34px}.site-footer{padding-left:22px;padding-right:22px}.login-visual{padding:35px}.login-panel{padding:30px}.login-copy h1{font-size:50px}#toast{left:calc(50% + 87px)}}
@media(max-width:600px){.sidebar{position:relative;width:100%;padding:16px 18px;display:block}.sidebar>.nav-label,.sidebar-foot,.nav-section{display:none}.sidebar .brand{font-size:15px;gap:10px}.brand-mark{font-size:32px;line-height:32px;width:33px}.brand-mark>span{font-size:17px}.sidebar nav{display:flex;gap:5px;justify-content:space-between;margin-top:15px}.sidebar nav a{padding:7px 8px;margin:0;font-size:10px;gap:5px}.nav-symbol{font-size:15px;width:16px}.shell{margin-left:0}.topbar{height:65px;padding:0 18px}.breadcrumb{font-size:10px}.breadcrumb span{padding:0 7px}.top-actions{gap:10px}.unit-switch button{font-size:10px;padding:5px 8px}.text-button{font-size:10px}.text-button span{display:none}main{padding:27px 18px 35px}.home-hero{padding-bottom:25px}.home-hero h1{font-size:40px}.home-hero p{font-size:12px}.section-top{margin:25px 0 15px}.section-top h2{font-size:16px}.section-top p{font-size:10px}.card-art{width:115px;min-width:115px;padding:12px}.card-art svg{height:92px}.art-tag{font-size:6px;letter-spacing:.8px}.card-body h3{font-size:18px}.card-body p{font-size:10px}.card-tags span{font-size:8px;padding:2px 4px}.card-link{font-size:10px}.card-body{padding:16px 13px}.workflow-panel{padding:18px}.workflow-stages div{font-size:10px}.workflow-stages div small{font-size:9px}.page-heading{display:block}.page-heading h1{font-size:34px}.recipe-buttons{margin-top:17px;flex-direction:row}.input-form{gap:0 14px;padding:16px}.field input,.field select{font-size:12px}.panel-head{padding:15px 16px}.results-table td{padding:10px 13px}.results-table{font-size:10px}.results-table td small{font-size:8px}.drawing-area{height:260px}.drawing-caption{font-size:8px;padding:9px 13px}.export-controls{width:100%;gap:6px}.export-controls select{flex:1;max-width:none}.export-controls button{padding:9px 10px}.site-footer{padding:20px 18px;font-size:9px}.site-footer>span:last-child{display:none}.login-layout{grid-template-columns:1fr}.login-visual{padding:24px 25px 27px;min-height:230px}.login-copy{padding:20px 0 0}.login-copy .eyebrow,.login-copy p,.login-bottom{display:none}.login-copy h1{font-size:35px;letter-spacing:-1px;margin:10px 0 0}.login-copy h1 br{display:none}.login-copy h1 br:after{content:' '}.login-drawing{height:230px;width:230px;bottom:-30px;right:-70px}.login-panel{padding:20px 25px}.login-form-wrap{padding:25px 0 40px;max-width:360px}.login-form-wrap h2{font-size:31px}.login-panel-footer{padding-bottom:10px}#toast{left:50%;width:max-content}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.calculation-summary{margin:16px 20px;padding:13px 15px;border:1px solid #d9e6df;background:#edf5ef;border-radius:5px}
.calculation-summary strong{display:block;font-size:14px;font-weight:600;color:var(--teal)}
.calculation-summary span{display:block;font-size:11px;color:var(--muted);margin-top:3px}
.calculation-summary.warning{background:#fff5e6;border-color:#edd8b7}
.calculation-summary.warning strong{color:#8c6235}
.field input[readonly]{background:#eef2ec;color:#78857d}
.card-art.fits{background-color:#edf3ed}.card-art.orings{background-color:#f5efe7}
.machining-note{margin:15px 20px;color:var(--muted);font-size:11px;line-height:1.7}
.limits-scroll{overflow-x:auto}.machining-table{width:100%;border-collapse:collapse;font-size:11px;font-variant-numeric:tabular-nums}
.machining-table th,.machining-table td{padding:11px 10px;border-top:1px solid var(--line);text-align:right;white-space:nowrap}
.machining-table th:first-child{text-align:left;white-space:normal;min-width:155px}.machining-table thead{background:var(--teal-soft);font-size:10px}
.machining-table tbody th{font-weight:500}.machining-table small{display:block;color:var(--muted);font-size:9px;font-weight:400;margin-top:3px}
@media(max-width:600px){.sidebar nav{justify-content:flex-start;overflow-x:auto;padding-bottom:4px}.sidebar nav a{flex-shrink:0}.calculation-summary{margin:13px}}