@layer reset, base, layout, components, responsive;@layer reset{*,:after,:before{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0}button,input,select{font:inherit}a,button,input,select,summary{-webkit-tap-highlight-color:transparent}a,button{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}dd,dl,h1,h2,h3,p{margin:0}fieldset{min-width:0;padding:0;border:0}svg{display:block;max-width:100%}}@layer base{:root{color-scheme:dark;--bg:#141813;--surface:#1a2018;--panel:#20271c;--ink:#f2f4e8;--muted:#aab39f;--faint:#78836f;--line:#35402e;--lime:#d3ed80;--amber:#e2bd6d;--lavender:#b3a6db;--blue:#a2c6dc;--mono:"SFMono-Regular","Cascadia Code",Consolas,monospace;--body:"Avenir Next","Trebuchet MS","PingFang SC","Microsoft YaHei",sans-serif;--display:"Avenir Next Condensed","DIN Alternate","Avenir Next","PingFang SC",sans-serif}body{background:var(--bg);color:var(--ink);font-family:var(--body);font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased}::selection{background:var(--lime);color:var(--bg)}:focus-visible{outline:3px solid var(--lime);outline-offset:5px}input:focus-visible,select:focus-visible{outline-offset:2px}input,select{border-radius:3px}input{font-feature-settings:"tnum";font-variant-numeric:tabular-nums}button:disabled{opacity:.4;cursor:not-allowed}[id]{scroll-margin-top:24px}.shell{width:min(1260px,calc(100% - 64px));margin-inline:auto}.micro-label{display:flex;align-items:center;gap:10px;color:var(--muted);font:11px/1.5 var(--mono);letter-spacing:.13em}.status-dot{display:inline-block;flex:0 0 6px;width:6px;height:6px;border-radius:100%;background:var(--lime);box-shadow:0 0 0 4px #d3ed800b}.skip-link{position:fixed;top:-90px;left:20px;z-index:100;background:var(--lime);color:var(--bg);padding:12px 22px}.skip-link:focus{top:10px}.print-header,.print-inputs{display:none}}@layer layout{.site-header{border-bottom:1px solid var(--line)}.header-inner{min-height:88px;display:flex;align-items:center;gap:44px}.brand{display:inline-flex;gap:12px;align-items:center;font-weight:650;font-size:25px;letter-spacing:-.055em;line-height:1}.brand svg,.brand-dot{color:var(--lime)}.header-inner nav{display:flex;gap:32px;margin-inline:auto;color:var(--muted);font-size:13px}.footer-main a:hover,.header-inner nav a:hover{color:var(--lime)}.language-link{font-size:12px;display:flex;gap:25px;align-items:center;border-left:1px solid var(--line);padding:8px 0 8px 30px}.language-link span{color:var(--lime);font-size:20px}.hero{padding-top:68px;padding-bottom:68px;display:grid;grid-template-columns:1.15fr 1fr;align-items:center;gap:35px}.micro-cross{color:var(--lime);font-size:24px;line-height:.8}.hero h1{margin-top:25px;font-family:var(--display);font-weight:550;font-size:clamp(52px,6.3vw,87px);line-height:1.05;letter-spacing:-.067em}.hero h1 em{color:var(--lime);font-style:normal}.hero__lead{max-width:500px;margin-top:26px;font-size:16px;line-height:1.8;color:var(--muted)}.hero__actions{margin-top:31px;gap:24px;flex-wrap:wrap}.hero__actions,.hero__local{display:flex;align-items:center}.hero__local{font:9px/1.6 var(--mono);letter-spacing:.03em;gap:9px;color:var(--muted)}.layer-art{position:relative;padding-top:8px}.layer-art svg{width:100%}.layer-art p{margin-top:12px;text-align:center;color:var(--faint);font:10px/1.7 var(--mono)}.layer-art p span{color:var(--lime);margin-right:8px}.tool-hero{padding-top:36px;padding-bottom:46px}.back-link{display:inline-block;color:var(--muted);font-size:12px;margin-bottom:32px}.back-link:hover{color:var(--lime)}.tool-hero__line{display:flex;gap:28px;align-items:center}.tool-hero__rule{height:1px;flex:1 1;background:var(--line)}.tool-hero h1{font-family:var(--display);font-size:clamp(37px,4.4vw,62px);font-weight:550;letter-spacing:-.045em;line-height:1.13;margin-top:20px;max-width:960px}.tool-hero>p{color:var(--muted);font-size:16px;max-width:730px;margin-top:19px;line-height:1.8}.calculator-wrap{margin-bottom:80px}.tool-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin-bottom:12px}.tool-tabs a{padding:15px 20px;display:flex;gap:15px;align-items:center;color:var(--muted);border:1px solid var(--line);font-size:13px;background:#181d15}.tool-tabs a>span:first-child{font:10px var(--mono);opacity:.7}.tool-tabs a[aria-current]{background:var(--lime);border-color:var(--lime);color:#253116}.tool-tabs a:hover{border-color:var(--lime)}.tool-tabs__arrow{margin-left:auto;font-size:18px}.workspace{border:1px solid #56644a;background:var(--surface)}.workspace__top{min-height:64px;padding:16px 28px;display:flex;justify-content:space-between;align-items:center;gap:20px;border-bottom:1px solid var(--line)}.workspace__top>div{display:flex;align-items:center;gap:13px;font-size:15px}.workspace__code{color:var(--faint);font:11px var(--mono)}.workspace__body{display:grid;grid-template-columns:1.16fr 1fr;align-items:stretch}.editor{padding:26px 30px 32px;min-width:0}.estimate{min-width:0;background:var(--panel);border-left:1px solid var(--line);padding:32px}.estimate__inner{position:sticky;top:24px}.workspace__bottom{border-top:1px solid var(--line);padding:15px 28px;display:flex;align-items:baseline;gap:13px;color:var(--muted);font-size:11px}.workspace__bottom>span{color:var(--lime);font-size:22px;line-height:.6}}@layer components{.button{display:inline-flex;justify-content:space-between;align-items:center;gap:24px;min-height:46px;border:1px solid transparent;border-radius:2px;padding:12px 20px;font-weight:600;font-size:12px;line-height:1.5;transition:background .15s,border-color .15s,transform .15s}.button--lime{background:var(--lime);color:#202b13}.button--lime:hover:not(:disabled){background:#e0f8a0;transform:translateY(-1px)}.button--line{background:transparent;color:var(--ink);border-color:#59684b}.button--line:hover:not(:disabled){border-color:var(--lime)}.reset-button{border:0;padding:5px 0;color:var(--muted);background:transparent;font-size:11px}.reset-button span{color:var(--lime);font-size:17px;margin-right:4px}.reset-button:hover{color:var(--ink)}.currency-setting{padding-bottom:23px;margin-bottom:26px;border-bottom:1px solid var(--line)}.currency-setting label{display:flex;align-items:center;justify-content:space-between;gap:25px;font-size:12px}select{background:#11170e;color:var(--ink);border:1px solid #4b5940;padding:12px;max-width:100%;min-height:45px}.currency-setting select{font:12px var(--mono);width:116px;padding:9px 12px;min-height:38px}.currency-setting p{margin-top:9px;color:var(--faint);font-size:11px;line-height:1.7}.field-group{margin:0 0 26px}.field-group:last-child{margin-bottom:0}.field-group legend{color:var(--lime);font:10px/1.5 var(--mono);letter-spacing:.09em;margin-bottom:17px}.fields-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:19px 18px}.field{display:flex;flex-direction:column;min-width:0;gap:8px}.field--wide{grid-column:1/-1}.field__label{color:#d5dccd;font-size:12px;line-height:1.5}.field__control{display:flex;min-height:46px;background:#11170e;border:1px solid #4b5940;border-radius:2px;align-items:center;transition:border-color .15s}.field__control:focus-within{border-color:var(--lime);box-shadow:0 0 0 1px var(--lime)}.field__control input{width:100%;min-width:0;padding:11px 8px 11px 12px;font:15px/1.5 var(--mono);border:0;outline:0;background:transparent;color:var(--ink);-moz-appearance:textfield}.field__control input::-webkit-inner-spin-button,.field__control input::-webkit-outer-spin-button{appearance:none;margin:0}.field__control>span{flex-shrink:0;max-width:52%;padding-right:11px;color:var(--muted);font:10px/1.5 var(--mono);overflow-wrap:anywhere}.field__control--invalid{border-color:#ef9b88}.field__hint{color:var(--faint);font-size:10px;line-height:1.65}.diameter-options{display:flex;gap:9px;margin-top:-8px}.diameter-options button{background:transparent;color:var(--muted);padding:4px 13px;border:1px solid var(--line);font:10px/1.5 var(--mono)}.diameter-options button[aria-pressed=true]{color:var(--lime);border-color:#70864b}.estimate .micro-label{font-size:9px}.estimate__headline{padding-top:28px;padding-bottom:30px}.estimate__headline h2{color:#c0cbb5;font-size:13px;font-weight:400;margin-bottom:9px}.estimate__amount{color:var(--lime);font-family:var(--display);font-weight:550;font-size:clamp(36px,4.5vw,61px);letter-spacing:-.055em;line-height:1.15;overflow-wrap:anywhere;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.estimate__sub{color:var(--muted);font:10px var(--mono);display:inline-block;margin-top:10px;letter-spacing:.08em}.cost-bar{height:10px;display:flex;gap:3px}.cost-bar>span{min-width:0;transition:flex .2s}.cost-legend{display:flex;flex-wrap:wrap;gap:7px 13px;margin-top:13px;font-size:9px;color:var(--muted)}.cost-legend span{display:flex;align-items:center;gap:5px}.cost-legend i,.result-list dt i{display:inline-block;width:5px;height:5px;flex:0 0 5px}.result-list{margin-top:25px}.result-list>div{display:flex;gap:24px;justify-content:space-between;padding:11px 0;border-bottom:1px solid #3b4732;font-size:12px;align-items:baseline}.result-list 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var(--mono);border-left:2px solid #566637;padding-left:20px}.guide__grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:70px}.worked-example{padding:24px;background:#1c2317;border:1px solid #35432a}.worked-example>.micro-label{color:var(--lime);font-size:9px}.worked-example p{color:#bfccb2;font-size:12px;line-height:1.9;margin-top:16px}.steps{margin-top:30px}.steps ol{list-style:none;padding:0;counter-reset:steps;margin-top:20px}.steps li{counter-increment:steps;color:var(--muted);position:relative;padding-left:37px;font-size:12px;margin-bottom:17px;line-height:1.8}.steps li:before{content:"0" counter(steps);position:absolute;left:0;top:0;color:var(--lime);font:10px/2 var(--mono)}.faq>.micro-label{margin-bottom:16px;font-size:9px}.faq details{border-bottom:1px solid var(--line)}.faq summary{padding:17px 0;display:flex;justify-content:space-between;align-items:baseline;gap:20px;cursor:pointer;font-size:13px;list-style:none}.faq summary::-webkit-details-marker{display:none}.faq 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p{color:var(--muted);font-size:11px;line-height:1.9;margin-top:10px;margin-bottom:28px}.tool-card__link{color:var(--lime);font-size:10px;display:flex;justify-content:space-between;margin-top:auto}.tool-card--active{border-top:2px solid var(--lime);padding-top:25px}.site-footer{border-top:1px solid var(--line);background:#10150e}.footer-main{padding-block:35px;display:flex;gap:35px;align-items:center}.footer-main .brand{font-size:21px}.footer-main>p{color:var(--faint);font-size:11px}.footer-main>div{margin-left:auto;display:flex;gap:24px;color:var(--muted);font-size:11px}.footer-bottom{display:flex;justify-content:space-between;gap:20px;padding-block:17px;border-top:1px solid #283120;color:var(--faint);font-size:10px}.info-page{padding-top:40px;padding-bottom:90px;max-width:850px}.info-page .micro-label{margin-top:16px}.info-page h1{font-family:var(--display);font-weight:550;font-size:clamp(39px,5vw,62px);line-height:1.2;letter-spacing:-.04em;margin-top:25px}.info-lead{margin-top:27px;color:#bac8ac;font-size:18px;max-width:740px}.info-page section{margin-top:40px;padding-top:25px;border-top:1px solid var(--line)}.info-page section h2{color:var(--lime);font-size:18px;font-weight:500}.info-page section p{color:var(--muted);margin-top:15px;line-height:1.9}}@layer responsive{@media (max-width:1000px){.shell{width:min(1260px,calc(100% - 40px))}.hero{gap:15px;padding-block:50px}.hero h1{font-size:65px}.hero__local{width:100%}.editor{padding:25px}.estimate{padding:27px}.workspace__body{grid-template-columns:1.1fr 1fr}.fields-grid{gap:17px 12px}.guide__grid{gap:35px}.guide__intro{gap:20px 35px}.guide h2,.section-heading h2{font-size:30px}}@media (max-width:800px){.header-inner{min-height:76px;gap:25px}.header-inner nav{gap:20px}.language-link{padding-left:20px;gap:10px}.hero{grid-template-columns:1.1fr .9fr}.hero 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