:root{--bg:#f6f8fc;--ink:#142033;--muted:#667085;--line:#e5eaf2;--brand:#2457d6;--card:#fff}*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Arial;color:var(--ink);background:var(--bg)}a{color:inherit;text-decoration:none}.container{max-width:1160px;margin:auto;padding:0 22px}.narrow{max-width:900px}.site-header{height:68px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.nav{height:100%;display:flex;align-items:center;justify-content:space-between}.brand{font-weight:800;font-size:20px}.nav nav{display:flex;gap:22px;font-size:14px}.nav nav a:hover{color:var(--brand)}.nav-toggle{display:none;border:0;background:none;font-size:24px}.hero{background:#fff;border-bottom:1px solid var(--line)}.hero-inner{text-align:center;padding:78px 22px 70px}.eyebrow,.kicker{font-size:12px;font-weight:800;letter-spacing:.12em;color:var(--brand)}h1{font-size:48px;line-height:1.1;margin:13px 0 16px}h2{font-size:30px;margin:6px 0}.hero p,.page-intro p,.tool-title p,.lead{font-size:18px;color:var(--muted)}.tool-search{max-width:720px;margin:30px auto 10px;display:flex;background:#fff;border:1px solid #cdd6e5;border-radius:14px;padding:6px;box-shadow:0 12px 30px #1a2a4a10}.tool-search input{flex:1;border:0;padding:14px;font-size:16px;outline:0}.tool-search button,.calc-btn,.download-btn{border:0;background:var(--brand);color:#fff;border-radius:9px;padding:12px 20px;font-weight:700;cursor:pointer}.hero-badges{display:flex;justify-content:center;gap:25px;color:#637083;font-size:13px;margin-top:20px}.search-results{max-width:720px;margin:0 auto;text-align:left;background:#fff;border:1px solid var(--line);border-radius:12px;display:none}.search-results.show{display:block}.search-results a{display:flex;justify-content:space-between;padding:13px 16px;border-bottom:1px solid var(--line)}.section{padding-top:55px;padding-bottom:20px}.section-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:18px}.count{color:var(--muted)}.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.tool-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;display:grid;grid-template-columns:46px 1fr 25px;gap:12px;align-items:center;transition:.2s}.tool-card:hover{transform:translateY(-2px);box-shadow:0 12px 28px #19305712;border-color:#cdd8eb}.tool-icon{width:44px;height:44px;border-radius:11px;background:#edf3ff;color:var(--brand);display:flex;align-items:center;justify-content:center;font-weight:800}.tool-icon.large{width:58px;height:58px;font-size:20px}.tool-card h3{margin:0 0 5px;font-size:16px}.tool-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.45}.arrow{color:#97a2b1}.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.article-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:21px}.article-card span{font-size:12px;color:var(--muted)}.article-card h3{margin:9px 0}.article-card p{color:var(--muted);font-size:14px}.tool-page{padding:32px 0 60px}.breadcrumbs{display:flex;gap:8px;font-size:13px;color:var(--muted);margin:10px 0 25px}.tool-title{display:flex;gap:17px;align-items:center;margin-bottom:25px}.tool-title h1{font-size:36px;margin:0 0 7px}.tool-title p{margin:0}.calculator-shell,.content-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;margin:18px 0}.calc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px;margin-bottom:16px}.calc-grid.three{grid-template-columns:repeat(3,1fr)}label{display:flex;flex-direction:column;gap:7px;font-size:14px;font-weight:650}input,select,textarea{width:100%;border:1px solid #ccd6e4;border-radius:9px;padding:12px;font:inherit;background:#fff}.result-box{margin-top:20px;background:#f2f6ff;border:1px solid #d9e4ff;border-radius:12px;padding:20px}.result-box>span{display:block;color:var(--muted);font-size:13px}.result-box>strong{display:block;font-size:31px;margin-top:5px}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.metrics.four{grid-template-columns:repeat(4,1fr)}.metrics div{background:#fff;border:1px solid #dce5f4;border-radius:10px;padding:13px}.metrics span{display:block;color:var(--muted);font-size:12px}.metrics strong{font-size:20px}.big-text{min-height:260px}.medium-text{min-height:110px}.code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.button-row{display:flex;gap:10px;margin-top:12px}.secondary-btn{border:1px solid #cbd5e2;background:#fff;border-radius:9px;padding:11px 16px;cursor:pointer}.prose{line-height:1.75;color:#334155}.prose h2{font-size:23px;margin-top:28px}.prose code{background:#f0f3f7;padding:3px 7px;border-radius:6px}.faq details{border-top:1px solid var(--line);padding:15px 0}.faq summary{font-weight:700;cursor:pointer}.faq p{color:var(--muted)}.mini-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.mini-grid a{border:1px solid var(--line);border-radius:10px;padding:14px}.mini-grid span{display:block;color:var(--muted);font-size:12px;margin-top:5px}.preview{display:block;max-width:100%;max-height:450px;margin:0 auto 15px;border-radius:10px}.download-btn{display:inline-block;margin-top:12px}.qrbox{display:flex;justify-content:center;padding:15px}.article{max-width:800px;padding-top:55px;padding-bottom:70px}.article h1{font-size:43px}.article-body{margin-top:35px}.ad-slot{margin-top:20px;margin-bottom:20px;padding:12px;text-align:center;border:1px dashed #d2d9e5;border-radius:10px;background:#fff}footer{background:#fff;border-top:1px solid var(--line);margin-top:60px;padding:40px 0 20px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}.footer-grid a{display:block;margin:7px 0;color:#596579}.footer-grid p,.copyright{color:var(--muted)}.copyright{border-top:1px solid var(--line);padding-top:20px;margin-top:25px;font-size:13px}.ok{color:#168043}.bad{color:#b42318}@media(max-width:850px){.nav nav{display:none}.nav-toggle{display:block}.nav-open .nav nav{display:flex;position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;padding:20px;border-bottom:1px solid var(--line)}h1{font-size:38px}.tool-grid,.article-grid{grid-template-columns:repeat(2,1fr)}.calc-grid.three{grid-template-columns:repeat(2,1fr)}}@media(max-width:560px){h1{font-size:32px}.hero-inner{padding-top:55px}.hero-badges{flex-wrap:wrap;gap:10px}.tool-grid,.article-grid,.calc-grid,.calc-grid.three,.metrics,.metrics.four,.mini-grid{grid-template-columns:1fr}.tool-search{flex-direction:column}.tool-title{align-items:flex-start}.tool-title h1{font-size:29px}.footer-grid{grid-template-columns:1fr}}/* Stage 2 additions */
.tool-category{display:inline-block;font-size:12px;font-weight:800;letter-spacing:.08em;color:var(--brand);text-transform:uppercase;margin-bottom:5px}.privacy-note{font-size:12px;color:#667085;background:#f8faff;border:1px solid #e4eaf5;border-radius:9px;padding:10px 12px;margin-bottom:18px}.inline-check{display:flex;flex-direction:row;align-items:center;gap:8px;margin:12px 0 16px;font-weight:500}.inline-check input{width:auto}.hint,.updated-note{font-size:12px;color:var(--muted);margin-top:10px}.updated-note{border-top:1px solid var(--line);padding-top:14px}.upload-box{display:grid;gap:15px}.swatch{height:72px;border-radius:12px;border:1px solid var(--line);margin-top:15px}.diff{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:13px;line-height:1.6}.diff>div{padding:3px 8px;border-radius:4px;margin:2px 0}.diff .same{background:#f7f8fa}.diff .removed{background:#fff0f0}.diff .added{background:#edf9f0}.category-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px;justify-content:center}.category-tabs a{background:#f3f6fb;border:1px solid var(--line);border-radius:999px;padding:8px 13px;font-size:13px}.popular-strip{background:#fff;border-bottom:1px solid var(--line)}.popular-inner{padding-top:24px;padding-bottom:24px}.popular-inner h2{font-size:20px}.popular-links{display:flex;gap:9px;flex-wrap:wrap}.popular-links a{border:1px solid var(--line);background:#fff;border-radius:9px;padding:9px 12px;font-size:13px}.popular-links a:hover{border-color:#bccbea;color:var(--brand)}
/* Stage 4 */
.article-tool-cta{margin:34px 0;padding:22px;border:1px solid #dce4f0;border-radius:16px;background:#f8faff;display:flex;gap:14px;align-items:center;flex-wrap:wrap}.article-tool-cta span{color:#667085}.article-tool-cta strong{font-size:18px;flex:1}.mobile-sticky-ad{display:none}.quick-code-list{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px}.compact-hero{padding:72px 0 56px}
@media(max-width:720px){.mobile-sticky-ad{display:block;position:fixed;left:8px;right:8px;bottom:8px;z-index:80;background:#fff;border:1px solid #dce4f0;border-radius:12px;padding:8px;box-shadow:0 10px 35px #18284833;text-align:center}.mobile-sticky-ad>button{position:absolute;right:3px;top:2px;border:0;background:#fff;border-radius:50%;width:25px;height:25px;font-size:18px;cursor:pointer}}

/* Stage 5 */
.trust-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.trust-grid>div{border:1px solid #e5eaf2;border-radius:10px;padding:14px}.trust-grid strong,.trust-grid span{display:block}.trust-grid span{margin-top:6px;color:#667085;line-height:1.55}.brand{letter-spacing:-.02em}@media(max-width:760px){.trust-grid{grid-template-columns:1fr}}
/* Stage 6 brand */
.brand{display:inline-flex;align-items:center;gap:9px}
.brand img{display:block;border-radius:8px;box-shadow:0 5px 14px rgba(36,87,214,.16)}
.launch-note{border:1px solid #dbe5ff;background:#f7f9ff;border-radius:14px;padding:16px 18px}
.editorial-meta{display:flex;gap:12px;flex-wrap:wrap;color:#667085;font-size:14px;margin:18px 0}

/* ===== Stage 6.2: tool UX / batch workflow / visual workbench ===== */
.tool-container{max-width:1060px}.tool-page .calculator-shell{padding:0;overflow:hidden;border-color:#dbe3ef}.calculator-shell>.privacy-note{margin:0;border:0;border-bottom:1px solid var(--line);border-radius:0;padding:12px 22px;background:#f8fafc;display:flex;gap:20px;flex-wrap:wrap}.calculator-shell>#toolApp{padding:28px}.calc-btn,.download-btn,.secondary-btn{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:border-color .15s,background .15s,transform .15s,box-shadow .15s}.calc-btn:hover,.download-btn:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(36,87,214,.18)}.secondary-btn:hover{border-color:#9eb0c9;background:#f8fafc}.calc-btn:disabled,.download-btn:disabled,.secondary-btn:disabled{opacity:.55;cursor:not-allowed;transform:none;box-shadow:none}input:focus,select:focus,textarea:focus{outline:3px solid rgba(36,87,214,.12);border-color:#7895de}.result-box{position:relative;overflow:hidden}.result-box:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--brand)}.result-box .download-btn{margin-top:16px}.result-preview{margin-top:16px;background:#f8fafc;border:1px solid var(--line);padding:8px}.metrics div,.metric-card{transition:border-color .15s,transform .15s}.metrics div:hover,.metric-card:hover{border-color:#bdcae0}.tool-workbench{display:grid;gap:20px}.file-drop{border:2px dashed #c8d4e5;border-radius:16px;background:#f8fafc;padding:32px 20px;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;cursor:pointer;transition:.16s;min-height:170px}.file-drop:hover,.file-drop:focus,.file-drop.dragover{border-color:var(--brand);background:#f3f7ff;outline:none}.file-drop.dragover{transform:scale(.995)}.file-drop-icon{width:50px;height:50px;border-radius:14px;background:#e9f0ff;color:var(--brand);display:grid;place-items:center;font-size:25px;font-weight:800;margin-bottom:5px}.file-drop strong{font-size:18px}.file-drop span{color:var(--muted);font-size:14px}.file-drop small{margin-top:5px;color:#8a96a8}.queue-head,.panel-title,.result-summary,.editor-head{display:flex;align-items:center;justify-content:space-between;gap:14px}.queue-head>div,.panel-title>div,.result-summary>div{display:flex;align-items:center;gap:10px}.queue-head>span,.panel-title>span,.editor-head span,.result-summary span{color:var(--muted);font-size:12px}.step-dot{width:28px;height:28px;display:inline-grid;place-items:center;border-radius:999px;background:#eaf1ff;color:var(--brand);font-size:12px;font-weight:800;flex:0 0 auto}.step-dot.done{background:#e9f7ef;color:#168043}.file-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:10px}.file-card{border:1px solid var(--line);border-radius:12px;padding:10px;display:grid;grid-template-columns:52px minmax(0,1fr) 34px;align-items:center;gap:10px;background:#fff}.file-card img{width:52px;height:52px;border-radius:8px;object-fit:cover;background:#f1f5f9}.file-card-body{min-width:0}.file-card-body strong,.file-card-body span{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-card-body strong{font-size:13px}.file-card-body span{font-size:12px;color:var(--muted);margin-top:4px}.icon-btn{width:32px;height:32px;border:1px solid #d7e0ec;border-radius:8px;background:#fff;cursor:pointer;color:#58677a;display:inline-grid;place-items:center;font-size:16px}.icon-btn:hover{border-color:#aab9ce;background:#f8fafc;color:var(--ink)}.settings-panel{border:1px solid var(--line);background:#fbfcfe;border-radius:14px;padding:18px}.settings-panel .panel-title{margin-bottom:16px}.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.settings-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.range-line{display:flex;align-items:center;gap:10px}.range-line input[type=range]{padding:0;border:0;outline:0;flex:1}.range-line strong{min-width:46px;text-align:right;color:var(--brand)}.setting-help{color:var(--muted);font-size:12px;margin:10px 0 0}.workbench-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.action-note{color:var(--muted);font-size:12px;margin-left:auto}.is-hidden{display:none!important}.task-progress{border:1px solid var(--line);border-radius:12px;padding:12px 14px;background:#fff}.task-progress-head{display:flex;justify-content:space-between;gap:10px;font-size:12px;color:var(--muted);margin-bottom:8px}.task-progress-head strong{color:var(--ink)}.task-progress-track{height:8px;background:#e9eef6;border-radius:999px;overflow:hidden}.task-progress-track i{display:block;height:100%;background:var(--brand);border-radius:999px;transition:width .2s}.batch-results{display:grid;gap:15px}.result-summary{padding:15px;border:1px solid #dbe5f5;background:#f7faff;border-radius:13px}.result-summary>div>div strong,.result-summary>div>div span{display:block}.summary-metrics{display:flex!important;gap:14px!important;flex-wrap:wrap}.summary-metrics span{white-space:nowrap}.summary-metrics b{display:block;color:var(--ink);font-size:14px;margin-top:2px}.result-actions{display:flex;gap:10px;flex-wrap:wrap}.output-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.output-card{border:1px solid var(--line);border-radius:13px;background:#fff;overflow:hidden;min-width:0}.output-preview{height:150px;background:#f3f6fa;display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--line)}.output-preview img{max-width:100%;max-height:100%;object-fit:contain}.output-info{padding:12px}.output-info>strong,.output-info>span{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.output-info>strong{font-size:13px}.output-info>span{font-size:11px;color:var(--muted);margin-top:4px}.size-compare{display:flex;justify-content:space-between;gap:8px;margin:10px 0;font-size:11px;color:var(--muted)}.size-compare b{font-size:11px}.warn{color:#b54708}.pdf-list{display:grid;gap:8px;margin-top:10px}.pdf-row{display:grid;grid-template-columns:34px 46px minmax(0,1fr) auto;gap:10px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:9px 10px;background:#fff}.pdf-row.dragging{opacity:.45}.pdf-order{width:28px;height:28px;border-radius:8px;background:#f2f5f9;display:grid;place-items:center;font-weight:700;color:#64748b}.pdf-file-icon{width:43px;height:43px;border-radius:9px;background:#fff2f1;color:#bd2c22;display:grid;place-items:center;font-size:10px;font-weight:900;border:1px solid #f2d6d2}.pdf-file-info{min-width:0}.pdf-file-info strong,.pdf-file-info span{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.pdf-file-info strong{font-size:13px}.pdf-file-info span{color:var(--muted);font-size:11px;margin-top:3px}.row-actions{display:flex;gap:5px}.single-file-meta{display:flex;align-items:center;gap:11px;border:1px solid var(--line);border-radius:12px;padding:12px;background:#fff}.single-file-meta>div:not(.pdf-file-icon) strong,.single-file-meta>div:not(.pdf-file-icon) span,.single-file-meta>strong,.single-file-meta>span{display:block}.single-file-meta span{font-size:12px;color:var(--muted);margin-top:4px}.crop-stage{display:grid;gap:16px}.crop-toolbar{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.crop-canvas-wrap{background:#111827;border-radius:14px;padding:12px;text-align:center;overflow:hidden}.crop-canvas-wrap canvas{display:block;max-width:100%;height:auto;margin:auto;cursor:crosshair;touch-action:none}.crop-canvas-wrap p{color:#cbd5e1;font-size:11px;margin:9px 0 0}.crop-numbers{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.json-workspace{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.editor-panel{border:1px solid var(--line);border-radius:14px;background:#fbfcfe;padding:14px;min-width:0}.editor-head{margin-bottom:10px}.editor-head>div:first-child strong,.editor-head>div:first-child span{display:block}.mini-actions{display:flex;gap:6px;flex-wrap:wrap}.mini-actions .secondary-btn{min-height:34px;padding:7px 10px;font-size:12px}.json-workspace textarea{min-height:360px;resize:vertical;background:#fff}.text-workspace{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(260px,.75fr);gap:14px;align-items:start}.live-stats{position:sticky;top:88px}.metric-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.metric-card{border:1px solid var(--line);border-radius:11px;background:#fff;padding:13px}.metric-card span{display:block;color:var(--muted);font-size:11px}.metric-card strong{font-size:22px;margin-top:3px;display:block}.keyword-panel{border:1px solid var(--line);border-radius:14px;padding:16px;background:#fbfcfe;margin-top:14px}.keyword-chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}.keyword-chips>span{border:1px solid #d7e1ee;border-radius:999px;padding:7px 10px;background:#fff;font-size:12px}.keyword-chips b{color:var(--brand);margin-left:3px}.empty-chip{color:var(--muted)}.qr-workspace{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);gap:18px;align-items:start}.qr-preview-panel{border:1px solid var(--line);border-radius:14px;background:#fbfcfe;min-height:390px;padding:18px;display:flex;align-items:center;justify-content:center;text-align:center}.empty-preview{display:grid;justify-items:center;gap:7px;color:var(--muted)}.empty-preview strong{color:var(--ink)}.empty-preview-icon{width:66px;height:66px;border-radius:16px;background:#eaf1ff;color:var(--brand);display:grid;place-items:center;font-size:31px}.qr-result-actions{display:grid;gap:9px;justify-items:center;margin-top:12px}.qr-result-actions span{font-size:11px;color:var(--muted)}.qrbox canvas,.qrbox img{max-width:100%;height:auto!important}.tool-page .big-text{line-height:1.55}
@media(max-width:850px){.output-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.settings-grid.three,.crop-toolbar{grid-template-columns:repeat(2,minmax(0,1fr))}.json-workspace,.qr-workspace{grid-template-columns:1fr}.text-workspace{grid-template-columns:1fr}.live-stats{position:static}.calculator-shell>#toolApp{padding:22px}}
@media(max-width:560px){.calculator-shell>.privacy-note{gap:8px;padding:11px 15px}.calculator-shell>#toolApp{padding:15px}.file-drop{min-height:150px;padding:24px 14px}.file-card-grid,.output-grid,.settings-grid,.settings-grid.three,.crop-toolbar{grid-template-columns:1fr}.file-card{grid-template-columns:46px minmax(0,1fr) 32px}.file-card img{width:46px;height:46px}.pdf-row{grid-template-columns:30px 40px minmax(0,1fr)}.pdf-row .row-actions{grid-column:2/4;justify-content:flex-end}.crop-numbers{grid-template-columns:repeat(2,minmax(0,1fr))}.workbench-actions>*{width:100%}.workbench-actions .action-note{margin-left:0;text-align:center}.summary-metrics{width:100%;justify-content:space-between}.result-summary{align-items:flex-start;flex-direction:column}.metric-card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.editor-head{align-items:flex-start;flex-direction:column}.mini-actions{width:100%}.mini-actions .secondary-btn{flex:1}.qr-preview-panel{min-height:300px}}
.converter-grid{display:grid;grid-template-columns:minmax(180px,1.1fr) minmax(150px,1fr) auto minmax(150px,1fr);gap:12px;align-items:end;margin-bottom:16px}.swap-btn{height:44px;min-width:62px;border:1px solid #cbd5e2;background:#fff;border-radius:10px;cursor:pointer;color:var(--brand);display:flex;flex-direction:column;align-items:center;justify-content:center;font-weight:800;line-height:1}.swap-btn span{font-size:9px;color:var(--muted);font-weight:600;margin-top:3px}.swap-btn:hover{background:#f5f8ff;border-color:#9eb2df}.result-box>strong small{font-size:.45em;font-weight:650;color:var(--muted)}
@media(max-width:700px){.converter-grid{grid-template-columns:1fr 1fr}.converter-grid>label:first-child{grid-column:1/3}.swap-btn{grid-row:2;grid-column:1/3;height:38px;flex-direction:row;gap:6px}.swap-btn span{margin:0;font-size:11px}}