:root{font-family:"Segoe UI",Arial,sans-serif;color:#182923;background:#f5f7f6;--ink:#182923;--muted:#586b61;--accent:#226247;--line:#d8e1dc;--paper:#fff;color-scheme:light;font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,a{-webkit-tap-highlight-color:transparent}button,input{font:inherit}button,a{touch-action:manipulation}button,a[role=button]{cursor:pointer}button:disabled,a[aria-disabled=true]{opacity:.42;cursor:default}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible,canvas:focus-visible{outline:3px solid #70a991;outline-offset:4px}button{color:var(--ink)}button,a[role=button]{transition:background-color .12s,border-color .12s,transform .08s}button:active:not(:disabled),a[role=button]:active:not([aria-disabled=true]){transform:translateY(1px)}.skip{position:fixed;top:-100px;left:16px;background:white;padding:12px;z-index:10}.skip:focus{top:10px}
.site-header,main,footer{max-width:1304px;margin:auto}.site-header{height:88px;padding:0 32px;display:flex;align-items:center;gap:38px;border-bottom:1px solid var(--line)}.brand{font-size:21px;font-weight:730;letter-spacing:-.9px;text-decoration:none;display:flex;align-items:center;gap:0}.brand-light{font-weight:400}.brand-mark{margin-right:10px;width:22px;height:22px;background:repeating-conic-gradient(var(--accent) 0 25%,transparent 0 50%) 0 0/11px 11px}.site-header nav{display:flex;gap:24px;font-size:13px}.site-header nav a{text-decoration:none;color:var(--muted)}.site-header nav a:hover{text-decoration:underline}.privacy{margin-left:auto;font-size:12px;color:var(--muted);display:flex;align-items:center;gap:8px}.dot{width:6px;height:6px;border-radius:50%;background:var(--accent)}main{padding:26px 32px 0}.page-heading{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:25px;gap:20px}.eyebrow{font-size:10px;font-weight:650;letter-spacing:1.8px;color:var(--muted);margin:0 0 9px}h1{font-size:38px;font-weight:630;letter-spacing:-1.6px;line-height:1.1;margin:0}.heading-note{font-size:12px;color:var(--muted);line-height:1.7;text-align:right;margin:0}.workspace{background:var(--paper);border:1px solid var(--line);border-radius:10px;display:grid;grid-template-columns:310px minmax(0,1fr);overflow:hidden;box-shadow:0 3px 18px #12251a04}.controls{padding:25px;border-right:1px solid var(--line)}.section-label{display:flex;align-items:center;gap:9px}.step{font:10px ui-monospace,Consolas,monospace;color:var(--accent);border:1px solid #c3d6cb;padding:3px 4px;border-radius:3px}.section-label h2{font-size:13px;font-weight:650;margin:0;letter-spacing:-.1px}.drop-zone{margin-top:19px;border:1px dashed #9ab6a7;border-radius:6px;background:#f6f9f7;transition:background-color .12s}.drop-zone:hover,.drop-zone.dragover{background:#e8f1ec;border-color:var(--accent)}.drop-zone button{display:flex;align-items:center;flex-direction:column;justify-content:center;width:100%;height:116px;border:0;background:none;padding:14px 10px 6px}.upload-symbol{font:24px/1 ui-monospace,monospace;color:var(--accent);margin-bottom:12px}.drop-zone strong{font-size:14px;font-weight:650}.drop-zone button>span:last-child{font-size:11px;margin-top:6px;color:var(--muted)}.drop-zone p{font-size:9px;letter-spacing:.15px;text-align:center;margin:7px 5px 14px;color:var(--muted)}.file-meta{font:10px/1.6 ui-monospace,Consolas,monospace;overflow-wrap:anywhere;min-height:30px;color:var(--muted);margin:11px 0 22px}.adjustments>.section-label{margin-bottom:18px}.control{margin-bottom:16px}.label-row{display:flex;align-items:center;justify-content:space-between;font-size:12px;font-weight:600;gap:8px}output{font:11px ui-monospace,Consolas,monospace;min-width:4ch;text-align:right;font-variant-numeric:tabular-nums;color:var(--accent)}input[type=range]{width:100%;height:29px;accent-color:var(--accent);margin:5px 0 0;touch-action:pan-y}.control p{font-size:10px;line-height:1.6;color:var(--muted);margin:0}.text-button{border:0;background:none;text-decoration:underline;text-underline-offset:3px;font-size:11px;min-height:36px;padding:5px 0;color:var(--muted)}.scope-note{font-size:10px;line-height:1.6;border-top:1px solid var(--line);padding-top:12px;color:var(--muted);margin:10px 0 0}
.result{padding:25px 28px 12px;min-width:0}.result-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:17px}.dimensions{font:10px ui-monospace,Consolas,monospace;color:var(--muted);font-variant-numeric:tabular-nums}.preview-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;gap:12px}.mode-switch{display:flex;background:#eef2ef;border:1px solid #e4eae6;border-radius:6px;padding:3px;gap:3px}.mode-switch button{font-size:11px;background:none;border:0;border-radius:4px;padding:8px 15px;min-height:34px;min-width:57px}.mode-switch button[aria-pressed=true]{background:#fff;color:var(--accent);box-shadow:0 1px 3px #17271e14;font-weight:650}.zoom{display:flex;align-items:center;gap:5px}.zoom button{border:1px solid var(--line);background:white;border-radius:4px;font-size:17px;width:32px;height:32px}.zoom span{font:10px ui-monospace,monospace;min-width:30px;text-align:center;color:var(--muted)}.preview-frame{height:350px;position:relative;overflow:hidden;border:1px solid #dbe3dd;border-radius:5px;background:repeating-conic-gradient(#eaf0ec 0 25%,#f4f7f4 0 50%) 0 0/22px 22px}.preview-frame canvas{width:100%;height:100%;display:block;touch-action:none;cursor:grab}.preview-frame canvas:active{cursor:grabbing}.empty{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;pointer-events:none}.empty-grid{display:grid;grid-template-columns:repeat(3,19px);gap:3px;margin-bottom:21px;transform:rotate(-6deg)}.empty-grid i{width:19px;height:19px;background:#c6d8cc;border:1px solid #aabfae}.empty-grid i:nth-child(2n){background:#dce7de}.empty-grid i:nth-child(5){background:#7b9f88}.empty strong{font-size:15px;font-weight:500;color:#476451}.empty p{font-size:11px;color:var(--muted);margin-top:9px}.preview-caption{display:flex;justify-content:space-between;gap:10px;margin-top:10px;font-size:10px;line-height:1.6;color:var(--muted)}.offset{font-family:ui-monospace,Consolas,monospace;white-space:nowrap}.export-bar{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding-top:18px;margin-top:20px;gap:12px}.export-bar strong{font-size:12px;font-weight:600}.export-bar p{font-size:10px;color:var(--muted);margin:5px 0 0}.export-actions{display:flex;gap:8px}.export-actions button,.export-actions a{min-height:43px;padding:12px 16px;border-radius:5px;font-size:12px;font-weight:600;border:1px solid var(--line);background:white;white-space:nowrap;text-decoration:none;text-align:center}.export-actions .primary{background:var(--accent);color:white;border-color:var(--accent)}.primary span{margin-left:10px}.export-actions .primary:hover:not([aria-disabled=true]){background:#194e37}#status{font-size:11px;line-height:1.5;color:var(--accent);margin:12px 0 0;min-height:25px;overflow-wrap:anywhere}#status.error{color:#a42929}
.reading{padding:70px 0 20px}.reading section{scroll-margin-top:30px}.reading h2{font-size:25px;line-height:1.25;letter-spacing:-.7px;font-weight:600;margin:0 0 20px}.reading p,.reading dd{font-size:14px;line-height:1.8;color:var(--muted);max-width:65ch;margin:0 0 16px}.explainer,.support,.faq{display:grid;grid-template-columns:1fr 1.4fr;gap:80px;padding:0 0 42px}.guide-grid{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:32px 0;margin:0 0 42px;gap:70px}.guide-number{font:27px/1.4 ui-monospace,Consolas,monospace;color:var(--accent);display:block;margin-bottom:11px}.guide-grid h2{font-size:18px;margin-bottom:10px}.guide-grid p{margin:0}.parameter-guide{display:grid;grid-template-columns:1fr 1.4fr;gap:80px;padding-bottom:38px}.parameter-guide dl{margin:0}.parameter-guide dl>div{padding:0 0 14px;margin:0 0 16px;border-bottom:1px solid var(--line)}dt{font-size:14px;font-weight:650;margin-bottom:8px}.parameter-guide dd{margin-left:0}.support{padding:30px 0 42px;border-top:1px solid var(--line)}.support h3{font-size:15px;margin:0 0 10px;font-weight:650}.support h3:not(:first-child){margin-top:24px}.faq{border-top:1px solid var(--line);padding-top:36px;gap:80px}.faq details{border-bottom:1px solid var(--line);padding:0 0 16px;margin-bottom:16px}.faq summary{font-size:14px;font-weight:600;cursor:pointer;line-height:1.6;min-height:32px}.faq details p{padding-top:12px;margin:0}footer{padding:23px 32px 30px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:11px}footer>a{text-underline-offset:3px}[hidden]{display:none!important}
@media(min-width:1500px){.preview-frame{height:390px}}@media(max-width:1000px){.workspace{grid-template-columns:270px minmax(0,1fr)}.controls{padding:21px}.result{padding:21px}.export-bar{align-items:flex-start;flex-direction:column}.export-actions{width:100%}.export-actions>*{flex:1}.reading{padding-top:50px}.explainer,.support,.faq,.parameter-guide{gap:40px}.privacy{font-size:10px}.site-header{gap:25px}.preview-caption{flex-direction:column;gap:3px}}
@media(max-width:700px){.site-header{height:66px;padding:0 18px;gap:15px}.brand{font-size:18px}.brand-mark{width:18px;height:18px;background-size:9px 9px;margin-right:7px}.site-header nav{gap:14px;font-size:11px;margin-left:auto}.privacy{display:none}main{padding:22px 16px 0}.page-heading{margin-bottom:20px;align-items:flex-start}.page-heading .eyebrow{font-size:8px;letter-spacing:1.3px}h1{font-size:30px;letter-spacing:-1.1px}.heading-note{display:none}.workspace{display:flex;flex-direction:column;overflow:visible;border-radius:8px}.controls{display:contents}.controls>.section-label,.drop-zone,.file-meta{margin-left:18px;margin-right:18px}.controls>.section-label{padding-top:20px}.drop-zone{margin-top:16px}.drop-zone button{height:91px;min-height:44px}.upload-symbol{font-size:22px;margin-bottom:7px}.drop-zone p{font-size:10px;margin-bottom:12px}.file-meta{min-height:0;margin-top:8px;margin-bottom:14px}.adjustments{order:3;padding:20px 18px 6px;border-top:1px solid var(--line)}.adjustments .section-label{margin-bottom:15px}.control{margin-bottom:12px}.label-row{font-size:13px}.control p{font-size:11px}.scope-note{order:4;padding:13px 18px 18px;margin:0;border-top:0;font-size:11px}.result{order:2;padding:0 18px 18px}.result-title{margin:0 0 12px;padding-top:10px}.section-label h2{font-size:13px}.dimensions{font-size:9px}.mode-switch button{min-height:40px;min-width:48px;padding:8px 10px;font-size:12px}.zoom button{height:40px;width:36px}.preview-frame{height:auto;aspect-ratio:1}.preview-caption{font-size:10px;gap:4px}.export-bar{margin-top:14px;padding-top:14px;gap:12px}.export-bar p{font-size:11px}.export-actions button,.export-actions a{min-height:46px;font-size:12px;padding:14px 10px}.export-bar>div:first-child{display:flex;flex-direction:column;gap:2px}.export-bar>div:first-child p{margin:0}#status{font-size:11px;min-height:32px}.reading{padding:38px 2px 0}.explainer,.support,.faq,.parameter-guide{grid-template-columns:1fr;gap:12px;padding-bottom:26px}.reading h2{font-size:23px;margin-bottom:12px}.reading p,.reading dd{font-size:14px;line-height:1.8}.guide-grid{gap:24px;padding:24px 0;margin-bottom:28px}.guide-grid h2{font-size:16px}.guide-grid p{font-size:12px;line-height:1.8}.guide-number{font-size:24px}.support,.faq{padding-top:28px}.faq summary{min-height:44px}.faq details{padding-bottom:12px;margin-bottom:12px}footer{flex-wrap:wrap;padding:20px 18px;gap:14px;font-size:10px}footer>span:nth-child(2){display:none}}
/* Review round 1: keep the export controls inside a 720px desktop viewport. */
@media(min-width:701px){.site-header{height:66px}main{padding-top:22px}.page-heading{margin-bottom:22px}h1{font-size:34px}.controls{padding:20px}.drop-zone{margin-top:14px}.drop-zone button{height:89px}.drop-zone p{margin-bottom:11px}.file-meta{margin:8px 0 15px;min-height:16px}.adjustments>.section-label{margin-bottom:14px}.control{margin-bottom:10px}.control p{display:none}input[type=range]{height:25px}.scope-note{margin-top:8px;padding-top:10px}.result{padding:20px 24px 10px}.preview-frame{height:260px}}
@media(min-width:1500px){.preview-frame{height:300px}}
@media(max-width:700px){.preview-frame{aspect-ratio:3/2}.site-header{height:60px}.drop-zone button{height:80px}.result-title{padding-top:3px}.drop-zone{margin-top:12px}.page-heading{margin-bottom:16px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;scroll-behavior:auto!important}}

/* Support page links */
footer{flex-wrap:wrap}footer nav{display:flex;flex-wrap:wrap;gap:4px 18px}footer nav a{display:inline-flex;align-items:center;min-height:44px;text-underline-offset:3px}