:root{color-scheme:light;--bg:#f6f5f1;--surface:#fff;--sidebar:#efeee8;--ink:#272b25;--muted:#777b71;--line:#e2e3da;--accent:#d94c23;--orange:#f0653d;--soft:#fff0e9;--grid:#dedfd6;--ruler:#f5eddd;--shadow:0 8px 30px #30302005}
:root[data-theme=dark]{color-scheme:dark;--bg:#171b18;--surface:#202621;--sidebar:#131714;--ink:#edf0e7;--muted:#a1aa9e;--line:#343d34;--accent:#ff9977;--orange:#fa865f;--soft:#3b2b24;--grid:#354034;--ruler:#33372a;--shadow:none}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.6 'Segoe UI',Arial,sans-serif}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit;background:none;border:0}button:disabled{opacity:.45;cursor:not-allowed}a:hover,button:hover{color:var(--accent)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--orange);outline-offset:3px}input,select{border:1px solid var(--line);border-radius:7px;background:var(--surface);color:var(--ink);padding:10px;width:100%;min-width:0}label{font-size:12px;font-weight:600}label input{margin-top:7px}input[type=range]{padding:0;accent-color:var(--orange)}[hidden]{display:none!important}.sidebar{width:224px;position:fixed;inset:0 auto 0 0;background:var(--sidebar);border-right:1px solid var(--line);padding:36px 22px 20px;display:flex;flex-direction:column;z-index:20}.brand{display:flex;gap:12px;align-items:center;font-size:17px;line-height:1.1;font-weight:600;letter-spacing:-.7px}.brand-icon{background:var(--orange);color:#fff;font-size:31px;border-radius:11px;width:42px;height:45px;display:grid;place-items:center;transform:rotate(-7deg)}.brand-line{display:block;font-size:30px;letter-spacing:-1px}.brand-dot,.footer-brand span{color:var(--orange)}.nav-label,.tiny-label,.eyebrow{font-size:10px;font-weight:700;letter-spacing:1.6px;color:var(--muted)}.nav-label{margin:52px 12px 14px}nav{display:grid;gap:6px}nav a{padding:11px 12px;display:flex;align-items:center;gap:12px;border-radius:7px;font-weight:500;font-size:13px}nav a>span{font-size:21px;line-height:1;width:23px}nav a.active{background:var(--surface);color:var(--accent);box-shadow:var(--shadow)}nav a small{margin-left:auto}.sidebar-bottom{margin-top:auto;display:grid;gap:13px;font-size:11px;color:var(--muted)}.local-badge{font-size:10px;letter-spacing:-.2px;display:flex;align-items:center;gap:7px;margin-bottom:10px}.live-dot{display:inline-block;flex-shrink:0;width:6px;height:6px;border-radius:50%;background:#7b9470}.theme-control{border-top:1px solid var(--line);padding-top:19px;margin-top:8px;display:flex;align-items:center;justify-content:space-between}.theme-control button{background:var(--surface);border:1px solid var(--line);padding:5px 8px;border-radius:6px;font-size:11px}.page{margin-left:224px}.topbar{height:76px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 42px;font-size:11px;color:var(--muted)}.breadcrumb{font-size:10px;letter-spacing:.9px}.breadcrumb span{margin:0 14px;color:var(--line)}.breadcrumb strong{color:var(--ink);font-size:11px;letter-spacing:0;font-weight:500}.topbar>a span{margin-left:15px}main{max-width:1600px;margin:auto;padding:42px}.hero{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:32px}.eyebrow{font-size:9px;letter-spacing:1.7px}.eyebrow span{color:var(--orange);padding:0 8px}h1{font-size:clamp(32px,3.4vw,54px);font-weight:500;letter-spacing:-2px;line-height:1.15;margin:13px 0 15px}h2{font-weight:500;font-size:29px;line-height:1.25;letter-spacing:-1px}h3{font-weight:600;font-size:14px}.hero p{color:var(--muted);max-width:550px;font-size:13px;line-height:1.8;margin:0}.status{white-space:nowrap;border:1px solid var(--line);border-radius:30px;font-size:10px;padding:9px 12px;background:var(--surface);display:flex;gap:9px;align-items:center}.status-dot{width:6px;height:6px;background:var(--orange);border-radius:50%}.status.calibrated .status-dot{background:#7b9470}.desk{display:grid;grid-template-columns:minmax(0,1fr) 258px;gap:22px;align-items:start}.workspace{overflow:hidden;border:1px solid var(--line);background:var(--surface);border-radius:12px;box-shadow:var(--shadow)}.toolbar{height:65px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 18px;gap:8px}.segmented{background:var(--bg);border:1px solid var(--line);padding:3px;display:flex;border-radius:7px}.segmented button{padding:4px 13px;font-size:12px;border-radius:4px}.segmented button[aria-pressed=true]{background:var(--surface);box-shadow:0 1px 4px #0001;color:var(--accent);font-weight:600}.toolbar-right{display:flex;gap:12px;font-size:15px;align-items:center}.toolbar-right span{font-size:11px;margin-left:2px}.toolbar-right button[aria-pressed=true]{color:var(--accent)}.stage{height:405px;position:relative;overflow:hidden;isolation:isolate;touch-action:none}.stage-grid{position:absolute;inset:0;background-image:radial-gradient(var(--grid) 1px,transparent 1px);background-size:20px 20px;z-index:-2}.stage-caption{position:absolute;top:65px;left:0;right:0;text-align:center;pointer-events:none}.stage-caption p{font-size:22px;letter-spacing:-.7px;font-weight:400;margin:15px 0 8px}.stage-caption>span:last-child{font-size:11px;color:var(--muted);line-height:1.9}.stage-caption .tiny-label{font-size:8px;letter-spacing:2px}.stage img{position:absolute;object-fit:fill;pointer-events:none;user-select:none}.stage:has(img:not([hidden])) .stage-caption{display:none}#ruler-svg,#geometry{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}#ruler-svg text{font-family:Consolas,monospace;font-size:10px;fill:var(--ink)}#ruler-svg .tick{stroke:var(--ink);stroke-width:1;opacity:.7}#ruler-svg .ruler-fill{fill:var(--ruler);stroke:var(--line)}#geometry .measure-line{stroke:var(--orange);stroke-width:2}#geometry .guide{stroke:var(--orange);stroke-width:1;stroke-dasharray:4 4;opacity:.6}#geometry .measure-area{fill:var(--orange);opacity:.08}.handle{position:absolute;transform:translate(-50%,-50%);border:2px solid var(--surface);border-radius:50%;width:22px;height:22px;background:var(--orange);box-shadow:0 0 0 1px var(--orange);touch-action:none;cursor:grab;padding:0;z-index:3}.handle::before{content:attr(data-letter);position:absolute;bottom:26px;left:50%;transform:translateX(-50%);color:var(--accent);font:700 10px Consolas,monospace}.handle:active{cursor:grabbing}.stage-note{position:absolute;left:0;right:0;bottom:16px;display:flex;gap:7px;align-items:center;justify-content:center;font-size:9px;color:var(--muted);padding:0 20px;text-align:center;pointer-events:none}.workspace-footer{height:47px;padding:0 18px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;font-size:10px;color:var(--muted);gap:8px}.workspace-footer button{font-size:10px}.inspector{display:grid;gap:14px}.card{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:20px;box-shadow:var(--shadow)}.readout .tiny-label{font-size:8px}.measurement{display:flex;align-items:baseline;gap:8px;margin:5px 0 0;line-height:1.3}.measurement>span:first-child{font-size:52px;font-weight:400;letter-spacing:-2px;font-variant-numeric:tabular-nums}.measurement>span:last-child{font-size:16px;color:var(--muted)}.equivalents{font:10px/1.7 Consolas,monospace;color:var(--muted);min-height:19px}.point-fields{display:flex;gap:10px;margin:16px 0}.point-fields label{flex:1;color:var(--muted);font-size:10px}.point-fields input{padding:7px 9px;font:12px Consolas,monospace;background:var(--bg)}.button{border:1px solid var(--line);border-radius:6px;padding:10px 13px;display:inline-flex;align-items:center;justify-content:center;gap:9px;font-size:11px;font-weight:600;background:var(--surface)}.button:hover{border-color:var(--accent)}.button.primary{background:var(--orange);border-color:var(--orange);color:#171b18}.button.primary:hover{filter:brightness(.95)}.full{width:100%}.card-heading{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:600}.cal-icon{font-size:19px;color:var(--accent)}.calibration-card{background:var(--soft);border-color:color-mix(in srgb,var(--orange) 16%,var(--line))}.calibration-card p{font-size:11px;color:var(--muted);margin:9px 0 14px}.calibration-card small{display:block;font-size:9px;color:var(--muted);text-align:center;margin-top:10px}.calibration-card .button{justify-content:space-between;background:transparent;border-color:color-mix(in srgb,var(--orange) 25%,var(--line))}.history-card .card-heading{font-size:11px;justify-content:space-between}.card-heading #history-count{background:var(--bg);padding:1px 6px;border-radius:4px;color:var(--muted);font-size:9px}.muted{color:var(--muted);font-size:11px}.history-card .muted{font-size:11px;line-height:1.9;margin:16px 0}.history-actions{border-top:1px solid var(--line);padding-top:11px;display:flex;justify-content:space-between}.history-actions button{font-size:9px;padding:0;color:var(--muted)}.history-row{padding:10px 0;border-bottom:1px solid var(--line);display:flex;gap:8px;justify-content:space-between;font-size:11px}.history-row small{display:block;font-size:9px;color:var(--muted)}#history{max-height:200px;overflow:auto}.howto{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:25px;margin:48px 0;padding-bottom:40px;border-bottom:1px solid var(--line)}.howto h2{margin:10px 0 0;font-size:27px}.howto h3{margin:9px 0 7px;font-size:12px}.howto p{color:var(--muted);font-size:11px;line-height:1.9;margin:0}.step{font:11px Consolas,monospace;color:var(--accent)}.faq{display:grid;grid-template-columns:1fr 1.65fr;gap:70px;margin:0 0 25px}.faq h2{margin:9px 0 12px}.faq>div>p{color:var(--muted);font-size:12px}.faq details{border-bottom:1px solid var(--line);padding:15px 0}.faq summary{cursor:pointer;font-size:12px;font-weight:500}.faq details p{color:var(--muted);font-size:12px;line-height:1.9}.photo-controls{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:20px;font-size:11px}.photo-controls input[type=file]{position:absolute;opacity:0;width:1px;height:1px}.photo-controls label:focus-within{outline:3px solid var(--orange)}.photo-controls input[type=number]{width:90px;padding:8px;margin:0 5px}.photo-controls>span{color:var(--muted);flex:1;min-width:160px}.converter{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:25px;margin-bottom:24px;display:grid;grid-template-columns:1fr 2fr;gap:30px}.converter input{font-size:30px;margin:8px 0 10px}.converter #conversion-results{display:grid;grid-template-columns:1fr 1fr;gap:15px}.conversion-item{background:var(--bg);border-radius:8px;padding:14px}.conversion-item strong{display:block;font:22px Consolas,monospace;overflow-wrap:anywhere}.conversion-item span{font-size:11px;color:var(--muted)}.article{max-width:800px;padding:35px 42px;font-size:15px;line-height:1.9}.article h2{font-size:24px;margin-top:30px}.article h2:first-child{margin-top:0}.article p,.article li{color:var(--muted)}.article a{color:var(--accent)}footer{border-top:1px solid var(--line);padding:23px 42px;display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:10px;color:var(--muted)}.footer-brand{font-size:14px;font-weight:600;color:var(--ink);letter-spacing:-.4px}footer>div{display:flex;gap:20px}dialog{width:min(540px,calc(100% - 30px));border:1px solid var(--line);border-radius:14px;color:var(--ink);background:var(--surface);padding:28px;max-height:90dvh;overflow:auto}dialog::backdrop{background:#1119;backdrop-filter:blur(4px)}.dialog-top{display:flex;justify-content:space-between;align-items:center}dialog h2{font-size:30px;margin:10px 0}dialog p{font-size:12px;color:var(--muted)}dialog label{display:block;margin-top:15px}.cal-scroll{overflow-x:auto;padding:20px 2px;margin:10px 0;background:var(--bg);border-radius:8px}#cal-bar{height:54px;background:var(--soft);border:2px solid var(--orange);border-radius:6px;display:grid;place-items:center;width:324px;color:var(--accent);font-size:11px}output{float:right;font:11px Consolas,monospace}.dialog-actions{display:flex;justify-content:space-between;align-items:center;margin-top:22px;gap:12px}.dialog-actions>button:first-child{font-size:11px;color:var(--muted)}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%) translateY(100px);background:var(--ink);color:var(--surface);padding:12px 22px;border-radius:8px;z-index:100;transition:transform .2s;font-size:12px;max-width:90vw;text-align:center}.toast.show{transform:translateX(-50%) translateY(0)}.skip-link{position:fixed;left:10px;top:-80px;z-index:100;background:var(--surface);padding:12px}.skip-link:focus{top:10px}.noscript{position:fixed;bottom:0;background:var(--surface);padding:10px;border:1px solid var(--line);z-index:99}.noscript a{text-decoration:underline}
@media(min-width:1500px){.stage{height:480px}main{padding-top:50px}.hero{margin-bottom:38px}}
@media(max-width:1200px){.sidebar{width:190px;padding:30px 14px}.page{margin-left:190px}main{padding:30px 25px}.topbar,footer{padding-left:25px;padding-right:25px}.desk{grid-template-columns:minmax(0,1fr) 230px;gap:15px}.toolbar{padding:0 12px}.toolbar-right{gap:6px}.toolbar-right span{display:none}.segmented button{padding:4px 10px}.card{padding:16px}.hero{align-items:start}.status{margin-top:25px}.howto{gap:18px}.faq{gap:30px}}
@media(max-width:950px){.sidebar{width:160px;padding:25px 10px}.page{margin-left:160px}.brand{font-size:13px;gap:8px}.brand-icon{width:32px;height:37px;font-size:26px}.brand-line{font-size:25px}nav a{font-size:11px;padding:10px 8px;gap:7px}.local-badge{display:none}.desk{grid-template-columns:1fr}.inspector{grid-template-columns:1fr 1fr}.history-card{grid-column:1/-1}.stage{height:385px}.hero{display:block}.status{margin-top:20px}.howto{grid-template-columns:1fr 1fr}.faq{grid-template-columns:1fr;gap:10px}.converter{grid-template-columns:1fr}.article{padding:25px}footer>span{display:none}}
@media(max-width:620px){.sidebar{position:relative;width:auto;inset:auto;padding:17px 18px 0;border-right:0;border-bottom:1px solid var(--line)}.brand{font-size:13px}.brand-line{font-size:24px}.brand-icon{height:34px;width:32px}.nav-label,.sidebar-bottom{display:none}nav{display:flex;overflow:auto;gap:7px;margin-top:18px;padding-bottom:12px;scrollbar-width:thin}nav a{white-space:nowrap;font-size:11px;padding:8px 10px}nav a>span{font-size:16px;width:18px}nav a small{display:none}.page{margin-left:0}.topbar{height:48px;padding:0 20px}.topbar>a{font-size:10px}main{padding:28px 17px}.hero{margin-bottom:24px}.hero .eyebrow{font-size:8px;letter-spacing:1.1px}h1{font-size:36px;letter-spacing:-1.5px}.hero p{font-size:12px}.status{padding:7px 10px;margin-top:15px}.stage{height:360px}.toolbar{height:55px}.stage-caption{top:42px}.stage-caption p{font-size:20px}.workspace-footer{padding:0 12px;font-size:9px}.workspace-footer button{font-size:9px}.inspector{gap:12px}.card{padding:15px}.measurement>span:first-child{font-size:42px}.point-fields{gap:6px}.point-fields input{padding:7px 5px}.calibration-card .button{font-size:10px;padding:9px}.calibration-card p{font-size:10px}.readout .button{font-size:10px;padding:10px 5px}.howto{margin:35px 0;padding-bottom:30px;gap:25px 20px}.howto h2{font-size:25px}.faq h2{font-size:26px}footer{padding:20px 17px;flex-wrap:wrap;font-size:9px}footer>div{gap:14px}.photo-controls{gap:8px}.converter{padding:18px;gap:20px}.conversion-item strong{font-size:19px}.article{padding:23px;font-size:14px}.article h2{font-size:23px}dialog{padding:22px}dialog h2{font-size:27px}.dialog-actions{flex-wrap:wrap}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

#mobile-theme{display:none;font-size:20px}@media(max-width:620px){#mobile-theme{display:block}.topbar{gap:14px}.topbar>a{margin-left:auto}}

.tool-note{max-width:850px;margin:0 0 42px}.tool-note h2{font-size:24px}.tool-note p{color:var(--muted);font-size:13px;line-height:1.9}