:root{--bg:#f4f6f9;--card:#fff;--text:#1a1d26;--muted:#6b7280;--border:#e5e7eb;--accent:#0b5fff;--accent-hover:#0047d4;--danger:#dc2626;--radius:12px;--shadow:0 4px 24px rgba(0,0,0,.07)}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;min-height:100vh}
.wrap{max-width:1100px;margin:0 auto;padding:1rem 1rem 2rem}
header{text-align:center;padding:1.5rem 0 1rem}
header h1{margin:0 0 .25rem;font-size:clamp(1.5rem,4vw,2rem);font-weight:700}
header p{margin:0;color:var(--muted);font-size:.95rem}
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label{display:block;font-weight:600;font-size:.9rem;margin-bottom:.35rem}
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textarea:focus,select:focus,input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(11,95,255,.15)}
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a.type-btn{display:flex;align-items:center;gap:.25rem;font:inherit;font-size:.7rem;line-height:1.25;padding:.3rem .45rem;border:1px solid var(--border);border-radius:6px;background:#fff;cursor:pointer;text-align:left;transition:all .12s;text-decoration:none;color:var(--text);min-height:0}
a.type-btn:hover{border-color:var(--accent);background:#eff6ff;color:var(--accent)}
a.type-btn.active{border-color:var(--accent);background:#eff6ff;color:var(--accent);font-weight:600;pointer-events:none}
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footer{text-align:center;color:var(--muted);font-size:.8rem;padding:1.5rem 0 1rem;border-top:1px solid var(--border);margin-top:.5rem}
footer a{color:var(--accent);text-decoration:none}
footer a:hover{text-decoration:underline}
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@media(min-width:600px){.row-4{grid-template-columns:repeat(4,1fr)}}
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@media(min-width:700px){.paid-grid{grid-template-columns:1fr 1.2fr}}
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@media(min-width:640px){.barcode-gallery{grid-template-columns:1fr 1fr}}
@media(min-width:960px){.barcode-gallery{grid-template-columns:repeat(3,1fr)}}
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.barcode-desc{margin:0 0 .35rem;font-size:.8rem;color:var(--text);line-height:1.45}
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.barcode-figure{margin:0;text-align:center}
.barcode-img{max-width:100%;height:auto;image-rendering:pixelated;image-rendering:crisp-edges;background:#fff;padding:.35rem .5rem;border:1px solid var(--border);border-radius:6px}
.barcode-decoded{margin:.65rem 0 0;font-size:.82rem;line-height:1.5}
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.barcode-dl a{color:var(--accent)}
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.qr-info-timeline{margin:0 0 .75rem;padding-left:1.25rem;font-size:.88rem;line-height:1.55}
.qr-info-timeline li{margin-bottom:.65rem}
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[hidden]{display:none !important}
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.batch-item{margin:0;text-align:center}
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.batch-links{font-size:.78rem}
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.info-list{margin:0;padding-left:1.15rem;font-size:.88rem;line-height:1.55}
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.special-qr-meta{margin:0 0 .75rem;font-size:.85rem;color:var(--muted)}
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.special-qr-figure--wide img{max-width:min(100%,520px)}
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.qr-designer{margin-top:1.25rem;padding-top:1rem;border-top:1px solid var(--border)}
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.shape-section-title{margin:0 0 .45rem;font-size:.78rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.shape-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(72px,1fr));gap:.45rem}
.shape-pick{display:flex;flex-direction:column;align-items:center;gap:.25rem;padding:.4rem .25rem;border:2px solid var(--border);border-radius:8px;background:#fff;cursor:pointer;font:inherit;font-size:.65rem;color:var(--muted);transition:border-color .15s,box-shadow .15s}
.shape-pick:hover{border-color:#94a3b8}
.shape-pick--active{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent);color:var(--text)}
.shape-pick__icon{width:28px;height:28px;background:var(--text);position:relative}
.shape-pick__label{line-height:1.2;text-align:center}
.shape-pick__icon--square{border-radius:0}
.shape-pick__icon--blob{border-radius:10px;transform:scale(.88)}
.shape-pick__icon--horizontal{height:8px;top:10px;border-radius:4px;width:24px;left:2px}
.shape-pick__icon--interconnect{border-radius:6px;transform:scale(.82)}
.shape-pick__icon--interconnect::after{content:'';position:absolute;width:8px;height:8px;left:10px;top:10px;background:var(--text);transform:rotate(45deg) scale(.85)}
.shape-pick__icon--notched{clip-path:polygon(18% 0%,82% 0%,100% 18%,100% 82%,82% 100%,18% 100%,0% 82%,0% 18%)}
.shape-pick__icon--fluid{border-radius:42% 58% 55% 45% / 48% 42% 58% 52%;transform:scale(.85)}
.shape-pick__icon--mosaic{background:transparent;overflow:hidden}
.shape-pick__icon--mosaic::before,.shape-pick__icon--mosaic::after{content:'';position:absolute;background:var(--text)}
.shape-pick__icon--mosaic::before{width:13px;height:13px;left:3px;top:3px;transform:rotate(45deg)}
.shape-pick__icon--mosaic::after{width:12px;height:12px;right:3px;bottom:3px;clip-path:polygon(0 0,100% 0,100% 100%)}
.shape-pick__icon--smallsquare{border-radius:0;transform:scale(.62)}
.shape-pick__icon--x{background:transparent}
.shape-pick__icon--x::before,.shape-pick__icon--x::after{content:'';position:absolute;left:50%;top:50%;width:3px;height:22px;background:var(--text);border-radius:1px}
.shape-pick__icon--x::before{transform:translate(-50%,-50%) rotate(45deg)}
.shape-pick__icon--x::after{transform:translate(-50%,-50%) rotate(-45deg)}
.shape-pick__icon--dot,.shape-pick__icon--dotlarge{border-radius:50%;transform:scale(.65)}
.shape-pick__icon--dotlarge{transform:scale(.85)}
.shape-pick__icon--rounded{border-radius:6px;transform:scale(.82)}
.shape-pick__icon--soft{border-radius:10px;transform:scale(.82)}
.shape-pick__icon--diamond{transform:rotate(45deg) scale(.7);border-radius:2px}
.shape-pick__icon--heart{border-radius:50% 50% 0 0;transform:rotate(-45deg) scale(.75);top:2px}
.shape-pick__icon--star{clip-path:polygon(50% 0%,61% 35%,98% 35%,68% 57%,79% 91%,50% 70%,21% 91%,32% 57%,2% 35%,39% 35%)}
.shape-pick__icon--starburst{clip-path:polygon(50% 0%,58% 30%,88% 18%,68% 42%,95% 62%,65% 62%,72% 95%,50% 72%,28% 95%,35% 62%,5% 62%,32% 42%,12% 18%,42% 30%)}
.shape-pick__icon--cross{background:transparent}
.shape-pick__icon--cross::before,.shape-pick__icon--cross::after{content:'';position:absolute;background:var(--text)}
.shape-pick__icon--cross::before{width:40%;height:100%;left:30%;top:0}
.shape-pick__icon--cross::after{width:100%;height:40%;left:0;top:30%}
.shape-pick__icon--triangle{clip-path:polygon(50% 8%,92% 88%,8% 88%)}
.shape-pick__icon--circle{border-radius:50%;background:transparent;border:4px solid var(--text);box-sizing:border-box}
.shape-pick__icon--circle::after{content:'';position:absolute;inset:9px;border-radius:50%;background:var(--text)}
.shape-pick__icon--leaf{border-radius:12px 4px 12px 4px;transform:scale(.85)}
.shape-pick__icon--leaf2{border-radius:4px 12px 4px 12px;transform:scale(.85)}
.shape-pick__icon--lens{border-radius:4px 12px 4px 12px;transform:scale(.85) skewX(-8deg)}
.shape-pick__icon--dotted{background:transparent;border:3px dotted var(--text);box-sizing:border-box}
.shape-pick__icon--spiky{clip-path:polygon(50% 0%,65% 35%,100% 35%,72% 55%,88% 100%,50% 72%,12% 100%,28% 55%,0% 35%,35% 35%)}
.shape-pick__icon--logo-none{background:transparent;border:2px solid #94a3b8;box-sizing:border-box;border-radius:50%}
.shape-pick__icon--logo-none::after{content:'';position:absolute;left:4px;top:4px;width:18px;height:2px;background:#94a3b8;transform:rotate(-45deg);transform-origin:left center}
.shape-pick__icon--logo-square{background:transparent;border:2px solid var(--text);box-sizing:border-box}
.shape-pick__icon--logo-square::after{content:'';position:absolute;inset:7px;background:var(--muted);opacity:.35;border-radius:1px}
.shape-pick__icon--logo-rounded{background:transparent;border:2px solid var(--text);border-radius:6px;box-sizing:border-box}
.shape-pick__icon--logo-rounded::after{content:'';position:absolute;inset:7px;background:var(--muted);opacity:.35;border-radius:3px}
.shape-pick__icon--logo-circle{background:transparent;border:2px solid var(--text);border-radius:50%;box-sizing:border-box}
.shape-pick__icon--logo-circle::after{content:'';position:absolute;inset:8px;background:var(--muted);opacity:.35;border-radius:50%}
.shape-pick__icon--logo-brackets{background:transparent;border:1px solid #cbd5e1;box-sizing:border-box}
.shape-pick__icon--logo-brackets::before,.shape-pick__icon--logo-brackets::after{content:'';position:absolute;width:7px;height:7px;border:2px solid var(--text)}
.shape-pick__icon--logo-brackets::before{left:3px;top:3px;border-right:none;border-bottom:none}
.shape-pick__icon--logo-brackets::after{right:3px;bottom:3px;border-left:none;border-top:none}
.shape-grid--logo-frame{grid-template-columns:repeat(auto-fill,minmax(64px,1fr))}
.qr-shape-preview-wrap{margin-top:1rem;text-align:center}
.qr-shape-preview-label{margin:0 0 .5rem;font-size:.82rem;color:var(--muted)}
.qr-shape-preview-figure{margin:0}
.qr-shape-preview-figure img{max-width:min(100%,280px);height:auto;border:1px solid var(--border);border-radius:8px;background:#fff;padding:.5rem}
.qr-api-snippets{margin-top:1rem;padding-top:1rem;border-top:1px solid var(--border);text-align:left}
.qr-api-snippets-title{margin:0 0 .65rem;font-size:.82rem;font-weight:600;color:var(--text)}
.qr-api-snippet{margin-bottom:.75rem}
.qr-api-snippet:last-child{margin-bottom:0}
.qr-api-snippet__head{display:flex;align-items:center;justify-content:space-between;gap:.5rem;margin-bottom:.3rem;flex-wrap:wrap}
.qr-api-snippet__label{font-size:.78rem;font-weight:600}
.qr-api-snippet__actions{display:flex;align-items:center;gap:.45rem}
.qr-api-snippet__try,.qr-api-snippet__copy{font:inherit;font-size:.72rem;padding:.2rem .5rem;border-radius:5px;cursor:pointer;text-decoration:none;line-height:1.3}
.qr-api-snippet__try{color:var(--accent);border:1px solid var(--accent);background:#fff}
.qr-api-snippet__try:hover{background:#eff6ff}
.qr-api-snippet__copy{color:var(--text);border:1px solid var(--border);background:#f8fafc}
.qr-api-snippet__copy:hover{border-color:#94a3b8}
.qr-api-snippet__copy--solo{margin-left:auto}
.qr-api-snippet__code{display:block;margin:0;padding:.55rem .65rem;font-family:ui-monospace,"Cascadia Code",monospace;font-size:.68rem;line-height:1.45;background:#f8fafc;border:1px solid var(--border);border-radius:6px;white-space:pre-wrap;word-break:break-all;max-height:9rem;overflow:auto}
.guide-callout{background:#f0f9ff;border:1px solid #bae6fd;border-radius:8px;padding:.85rem 1rem;margin:1rem 0}
.guide-callout h3{margin:0 0 .45rem;font-size:.92rem;color:var(--text)}
.guide-callout p,.guide-callout ul{margin:0;font-size:.85rem;line-height:1.5;color:var(--text)}
.guide-callout ul{padding-left:1.1rem;margin-top:.35rem}
.guide-callout li{margin-bottom:.25rem}
.guide-pill{display:inline-block;font-size:.72rem;font-weight:600;padding:.1rem .4rem;border-radius:4px;white-space:nowrap}
.guide-pill--ok{background:#dcfce7;color:#166534}
.guide-pill--mid{background:#fef9c3;color:#854d0e}
.guide-pill--warn{background:#ffedd5;color:#9a3412}
.guide-type-group{margin:1.25rem 0 .5rem;font-size:.95rem;font-weight:600;color:var(--text)}
.guide-type-group:first-of-type{margin-top:.5rem}
.guide-type-table td:first-child{white-space:nowrap;font-weight:600}
.guide-type-table td:first-child a{color:var(--accent);text-decoration:none}
.guide-type-table td:first-child a:hover{text-decoration:underline}
.form-field-help{margin-top:1.25rem}
.form-field-help__title{margin:0 0 .35rem;font-size:1.05rem}
.form-field-help__content{margin-top:.75rem}
.form-field-help__group{margin:1.1rem 0 .45rem;font-size:.88rem;font-weight:600;color:var(--text)}
.form-field-help__group:first-child{margin-top:0}
.form-field-help__list{margin:0 0 .5rem;display:grid;gap:.35rem .75rem}
@media (min-width:640px){.form-field-help__list{grid-template-columns:minmax(9rem,11rem) 1fr;align-items:baseline}}
.form-field-help__list dt{margin:0;font-size:.82rem;font-weight:600;color:var(--text)}
.form-field-help__list dd{margin:0;font-size:.82rem;line-height:1.45;color:var(--muted)}
@media (min-width:640px){.form-field-help__list dd{border-left:1px solid var(--border);padding-left:.75rem}}