/* QR Sign Maker — mobile-first, no web fonts, no external assets */

:root{
  --ink:#0f172a;
  --ink-2:#334155;
  --ink-3:#64748b;
  --line:#e2e8f0;
  --line-2:#cbd5e1;
  --bg:#ffffff;
  --bg-soft:#f8fafc;
  --bg-alt:#f1f5f9;
  --brand:#2563eb;
  --brand-dark:#1d4ed8;
  --brand-soft:#eff6ff;
  --ok:#15803d;
  --ok-soft:#f0fdf4;
  --warn:#b45309;
  --warn-soft:#fffbeb;
  --bad:#b91c1c;
  --bad-soft:#fef2f2;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(15,23,42,.05), 0 8px 24px -12px rgba(15,23,42,.18);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{line-height:1.2;margin:0 0 .5em;letter-spacing:-.02em}
p{margin:0 0 1em}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
code{background:var(--bg-alt);padding:.1em .35em;border-radius:4px;font-size:.9em}

.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
.wrap-narrow{max-width:760px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.88);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px}
.brand{display:flex;align-items:center;gap:9px;color:var(--ink);font-weight:700;letter-spacing:-.02em}
.brand:hover{text-decoration:none}
.brand-mark{display:flex;color:var(--ink)}
.brand-name{font-size:16px}
.site-nav{display:none;gap:22px}
.site-nav a{color:var(--ink-2);font-size:14.5px;font-weight:500}
@media(min-width:820px){.site-nav{display:flex}}

/* ---------- hero ---------- */
.hero{padding:44px 0 28px;background:linear-gradient(180deg,var(--brand-soft),#fff 70%)}
.eyebrow{
  display:inline-block;font-size:12.5px;font-weight:600;letter-spacing:.04em;
  text-transform:uppercase;color:var(--brand-dark);background:#fff;
  border:1px solid #dbeafe;border-radius:999px;padding:5px 12px;margin:0 0 16px;
}
.hero h1{font-size:clamp(28px,5.4vw,44px);max-width:16ch}
.lede{font-size:clamp(16px,2.2vw,19px);color:var(--ink-2);max-width:62ch;margin-bottom:0}

/* ---------- tool ---------- */
.tool-section{padding:26px 0 44px}
.tool-grid{display:grid;gap:20px;align-items:start}
@media(min-width:1000px){.tool-grid{grid-template-columns:minmax(0,1fr) 380px;gap:26px}}

.panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.controls{padding:6px 20px 22px}
.step{padding:20px 0;border-bottom:1px solid var(--line)}
.step:last-child{border-bottom:0;padding-bottom:4px}
.step-head{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.step-head h2{font-size:16.5px;margin:0}
.step-num{
  flex:0 0 24px;width:24px;height:24px;border-radius:50%;
  background:var(--ink);color:#fff;font-size:13px;font-weight:700;
  display:grid;place-items:center;
}

/* type grid */
.type-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}
@media(min-width:560px){.type-grid{grid-template-columns:repeat(3,1fr)}}
.type-btn{
  display:flex;flex-direction:column;align-items:flex-start;gap:6px;
  padding:11px 12px;border:1.5px solid var(--line);border-radius:var(--radius-sm);
  background:#fff;cursor:pointer;text-align:left;font:inherit;color:var(--ink-2);
  transition:border-color .12s,background .12s,color .12s;
}
.type-btn:hover{border-color:var(--line-2);background:var(--bg-soft)}
.type-btn.is-active{border-color:var(--brand);background:var(--brand-soft);color:var(--brand-dark)}
.type-ico{font-size:17px;line-height:1;opacity:.85}
.type-label{font-size:13.5px;font-weight:600;line-height:1.25}

/* fields */
.fields{display:grid;gap:15px}
.field-row{display:grid;gap:7px}
.field-label{font-size:13.5px;font-weight:600;color:var(--ink-2)}
.field-label .opt{font-weight:400;color:var(--ink-3)}
.field-label .val{float:right;font-weight:500;color:var(--ink-3)}
.text-input,select,input[type=file]{
  width:100%;padding:10px 12px;border:1.5px solid var(--line);border-radius:var(--radius-sm);
  font:inherit;font-size:15px;color:var(--ink);background:#fff;
}
.text-input:focus,select:focus,input[type=color]:focus,.hex:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(37,99,235,.14)
}
input[type=file]{padding:8px;font-size:13.5px;color:var(--ink-3)}
select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2364748b' stroke-width='1.8' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 12px center;background-size:11px;padding-right:34px}
.hint{font-size:12.5px;color:var(--ink-3);margin:0;line-height:1.45}
.note-box{
  font-size:12.5px;color:var(--warn);background:var(--warn-soft);
  border:1px solid #fde68a;border-radius:var(--radius-sm);padding:9px 11px;margin:2px 0 0;line-height:1.45
}
.field-error{
  font-size:13px;color:var(--bad);background:var(--bad-soft);border:1px solid #fecaca;
  border-radius:var(--radius-sm);padding:9px 11px;margin:12px 0 0
}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:15px}
.check{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-2);cursor:pointer;margin-bottom:15px}
.check input{width:16px;height:16px;accent-color:var(--brand);margin:0}

/* colors */
.color-input{display:flex;gap:8px;align-items:center}
input[type=color]{
  width:44px;height:40px;padding:3px;border:1.5px solid var(--line);
  border-radius:var(--radius-sm);background:#fff;cursor:pointer;flex:0 0 auto
}
.hex{
  flex:1;min-width:0;padding:10px 11px;border:1.5px solid var(--line);border-radius:var(--radius-sm);
  font:inherit;font-size:14px;font-variant-numeric:tabular-nums;text-transform:uppercase
}

/* presets */
.preset-row{display:flex;flex-wrap:wrap;gap:8px}
.preset{
  display:flex;align-items:center;gap:7px;padding:6px 11px 6px 7px;border:1.5px solid var(--line);
  border-radius:999px;background:#fff;cursor:pointer;font:inherit;font-size:12.5px;font-weight:600;color:var(--ink-2)
}
.preset:hover{border-color:var(--line-2);background:var(--bg-soft)}
.swatch{width:20px;height:20px;border-radius:50%;display:grid;place-items:center;border:1px solid var(--line-2)}
.swatch i{width:9px;height:9px;border-radius:2px;display:block}

/* segmented */
.seg{display:inline-flex;background:var(--bg-alt);border-radius:var(--radius-sm);padding:3px;gap:2px}
.seg-btn{
  border:0;background:transparent;padding:7px 15px;border-radius:8px;cursor:pointer;
  font:inherit;font-size:13.5px;font-weight:600;color:var(--ink-3)
}
.seg-btn.is-active{background:#fff;color:var(--ink);box-shadow:0 1px 2px rgba(15,23,42,.1)}

/* emoji */
.emoji-row{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:4px}
.emoji-btn{
  width:38px;height:38px;font-size:19px;line-height:1;border:1.5px solid var(--line);
  border-radius:var(--radius-sm);background:#fff;cursor:pointer;display:grid;place-items:center
}
.emoji-btn:hover{border-color:var(--line-2)}
.emoji-btn.is-active{border-color:var(--brand);background:var(--brand-soft)}

input[type=range]{width:100%;accent-color:var(--brand)}

.advanced{border-top:1px solid var(--line);padding-top:14px;margin-top:4px}
.advanced summary{
  cursor:pointer;font-size:13.5px;font-weight:600;color:var(--ink-2);
  list-style:none;padding:4px 0
}
.advanced summary::-webkit-details-marker{display:none}
.advanced summary::before{content:"▸ ";color:var(--ink-3)}
.advanced[open] summary::before{content:"▾ "}
.advanced .grid-2{margin-top:14px}

/* ---------- preview ---------- */
.preview-panel{padding:18px}
@media(min-width:1000px){
  .preview-sticky{position:sticky;top:78px}
}
.preview-stage{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:18px;display:grid;place-items:center;min-height:270px;
}
.preview-empty{text-align:center;color:var(--ink-3);display:grid;justify-items:center;gap:10px}
.preview-empty p{margin:0;font-size:14px}
.preview-qr{width:100%;max-width:280px}
.preview-qr svg{display:block;width:100%;height:auto;border-radius:6px}
.preview-qr.is-transparent svg{
  background-image:linear-gradient(45deg,#e2e8f0 25%,transparent 25%),linear-gradient(-45deg,#e2e8f0 25%,transparent 25%),
    linear-gradient(45deg,transparent 75%,#e2e8f0 75%),linear-gradient(-45deg,transparent 75%,#e2e8f0 75%);
  background-size:14px 14px;
  background-position:0 0,0 7px,7px -7px,-7px 0;
}

/* scan status */
.scan-status{margin-top:14px;border-radius:var(--radius-sm);padding:12px 13px;border:1px solid}
.scan-status.level-excellent,.scan-status.level-good{background:var(--ok-soft);border-color:#bbf7d0}
.scan-status.level-warning{background:var(--warn-soft);border-color:#fde68a}
.scan-status.level-error{background:var(--bad-soft);border-color:#fecaca}
.status-head{display:flex;align-items:center;gap:8px}
.status-dot{width:9px;height:9px;border-radius:50%;flex:0 0 auto}
.level-excellent .status-dot,.level-good .status-dot{background:var(--ok)}
.level-warning .status-dot{background:var(--warn)}
.level-error .status-dot{background:var(--bad)}
.status-headline{font-size:13.5px;font-weight:700}
.level-excellent .status-headline,.level-good .status-headline{color:var(--ok)}
.level-warning .status-headline{color:var(--warn)}
.level-error .status-headline{color:var(--bad)}
.status-issues{list-style:none;margin:8px 0 0;padding:0;display:grid;gap:6px}
.status-issues li{font-size:12.5px;line-height:1.45;color:var(--ink-2);padding-left:14px;position:relative}
.status-issues li::before{content:"•";position:absolute;left:2px;color:var(--ink-3)}
.status-issues li.issue-error::before{content:"!";font-weight:700;color:var(--bad)}
.status-issues li.issue-warning::before{content:"!";font-weight:700;color:var(--warn)}
.verify-line{margin:9px 0 0;font-size:12.5px;font-weight:600}
.verify-line.ok{color:var(--ok)}
.verify-line.bad{color:var(--bad)}

.meta-line{
  margin-top:10px;font-size:11.5px;color:var(--ink-3);text-align:center;
  font-variant-numeric:tabular-nums
}

/* downloads */
.downloads{margin-top:16px;border-top:1px solid var(--line);padding-top:16px}
.dl-head{font-size:15px;font-weight:700;margin-bottom:12px}
.dl-buttons{display:grid;gap:8px;margin-top:12px}
@media(min-width:420px){.dl-buttons{grid-template-columns:1fr 1fr}}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:11px 16px;border-radius:var(--radius-sm);border:1.5px solid transparent;
  font:inherit;font-size:14.5px;font-weight:600;cursor:pointer;transition:background .12s,border-color .12s
}
.btn:disabled{opacity:.6;cursor:default}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover:not(:disabled){background:var(--brand-dark)}
.btn-secondary{background:#fff;border-color:var(--line-2);color:var(--ink)}
.btn-secondary:hover{background:var(--bg-soft)}
.btn-ghost{background:#fff;border-color:var(--line-2);color:var(--ink-2)}
.btn-sm{padding:7px 13px;font-size:13px}
.dl-hint{margin-top:9px}
.coming-soon{
  margin-top:14px;font-size:12.5px;color:var(--ink-3);background:var(--bg-soft);
  border:1px dashed var(--line-2);border-radius:var(--radius-sm);padding:10px 11px;line-height:1.45
}
.cs-tag{
  display:inline-block;font-size:10.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;
  color:var(--brand-dark);background:var(--brand-soft);border-radius:4px;padding:2px 6px;margin-right:6px
}

/* ---------- content sections ---------- */
.section{padding:52px 0}
.section-alt{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-title{font-size:clamp(22px,3.6vw,30px);text-align:center;margin-bottom:10px}
.section-sub{text-align:center;color:var(--ink-3);max-width:60ch;margin:0 auto 30px}

.steps-3{list-style:none;margin:26px 0 0;padding:0;display:grid;gap:18px}
@media(min-width:760px){.steps-3{grid-template-columns:repeat(3,1fr);gap:22px}}
.steps-3 li{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.s3-num{
  display:grid;place-items:center;width:32px;height:32px;border-radius:9px;
  background:var(--brand-soft);color:var(--brand-dark);font-weight:700;margin-bottom:12px
}
.steps-3 h3{font-size:16.5px}
.steps-3 p{margin:0;font-size:14.5px;color:var(--ink-2)}

.use-grid{display:grid;grid-template-columns:1fr;gap:12px}
@media(min-width:600px){.use-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:940px){.use-grid{grid-template-columns:repeat(4,1fr)}}
.use-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px 17px}
.use-card h3{font-size:15px;margin-bottom:5px}
.use-card p{margin:0;font-size:13.5px;color:var(--ink-3);line-height:1.5}

.faq{border-bottom:1px solid var(--line);padding:4px 0}
.faq summary{
  cursor:pointer;padding:15px 30px 15px 0;font-weight:600;font-size:16px;position:relative;list-style:none
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";position:absolute;right:4px;top:50%;transform:translateY(-50%);
  font-size:20px;font-weight:400;color:var(--ink-3)
}
.faq[open] summary::after{content:"−"}
.faq p{margin:0 0 16px;color:var(--ink-2);font-size:15px}

.privacy-band p{color:var(--ink-2);text-align:center;max-width:66ch;margin:0 auto}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#cbd5e1;padding:30px 0;font-size:13.5px}
.footer-inner p{margin:0 0 6px}
.footer-note{color:#94a3b8;font-size:12px}

@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}

.blocked-note{
  margin:10px 0 0;font-size:12.5px;color:var(--bad);background:var(--bad-soft);
  border:1px solid #fecaca;border-radius:var(--radius-sm);padding:9px 11px;line-height:1.45
}

@media(min-width:420px){.dl-buttons{grid-template-columns:1fr 1fr}}
@media(min-width:520px){.dl-buttons{grid-template-columns:repeat(3,1fr)}}
.print-size{
  margin:10px 0 0;font-size:12.5px;color:var(--ink-2);background:var(--bg-soft);
  border:1px solid var(--line);border-radius:var(--radius-sm);padding:8px 10px;line-height:1.45
}
.print-size strong{color:var(--ink)}

/* ---------- 3D object controls ---------- */
.obj-grid{display:grid;grid-template-columns:1fr;gap:9px}
@media(min-width:520px){.obj-grid{grid-template-columns:repeat(3,1fr)}}
.obj-btn{
  display:flex;flex-direction:column;align-items:flex-start;gap:3px;
  padding:12px;border:1.5px solid var(--line);border-radius:var(--radius-sm);
  background:#fff;cursor:pointer;text-align:left;font:inherit;color:var(--ink-2);
  transition:border-color .12s,background .12s
}
.obj-btn:hover{border-color:var(--line-2);background:var(--bg-soft)}
.obj-btn.is-active{border-color:var(--brand);background:var(--brand-soft);color:var(--brand-dark)}
.obj-ico{font-size:19px;line-height:1}
.obj-name{font-size:13.5px;font-weight:700}
.obj-sub{font-size:11.5px;color:var(--ink-3)}
.obj-btn.is-active .obj-sub{color:var(--brand-dark);opacity:.8}

.print-report{display:grid;gap:6px;margin-top:4px}
.print-report:empty{display:none}
.print-line{
  font-size:12.5px;line-height:1.45;padding:9px 11px;border-radius:var(--radius-sm);border:1px solid
}
.print-line.info{background:var(--bg-soft);border-color:var(--line);color:var(--ink-2)}
.print-line.warning{background:var(--warn-soft);border-color:#fde68a;color:var(--warn)}
.print-line.error{background:var(--bad-soft);border-color:#fecaca;color:var(--bad)}
.print-dims{
  font-size:12.5px;color:var(--ink-2);background:var(--bg-soft);border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:9px 11px;font-variant-numeric:tabular-nums
}
.print-dims strong{color:var(--ink)}

/* ---------- preview tabs + 3D stage ---------- */
.preview-tabs{display:inline-flex;background:var(--bg-alt);border-radius:var(--radius-sm);padding:3px;gap:2px;margin-bottom:12px}
.ptab{
  border:0;background:transparent;padding:7px 15px;border-radius:8px;cursor:pointer;
  font:inherit;font-size:13.5px;font-weight:600;color:var(--ink-3)
}
.ptab.is-active{background:#fff;color:var(--ink);box-shadow:0 1px 2px rgba(15,23,42,.1)}

.stage3d{width:100%}
#canvas3d{
  display:block;width:100%;height:300px;touch-action:none;cursor:grab;
  background:linear-gradient(180deg,#f8fafc,#e9eef5);border-radius:var(--radius-sm)
}
#canvas3d:active{cursor:grabbing}
.viewer-hint{margin:8px 0 0;font-size:11.5px;color:var(--ink-3);text-align:center}
.viewer-fallback{
  margin:8px 0 0;font-size:12.5px;color:var(--warn);background:var(--warn-soft);
  border:1px solid #fde68a;border-radius:var(--radius-sm);padding:9px 11px
}

.viewer-loading{
  margin:10px 0 0;font-size:12.5px;color:var(--ink-3);text-align:center
}

/* ---------- advertising placeholders (no network loaded) ---------- */
.ad-slot{padding:8px 0 28px}
.ad-slot-content{padding:28px 0;background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.ad-box{
  display:flex;align-items:center;justify-content:center;
  border:1px dashed var(--line-2);border-radius:var(--radius-sm);
  background:repeating-linear-gradient(135deg,#fff,#fff 10px,var(--bg-soft) 10px,var(--bg-soft) 20px);
  color:var(--ink-3);font-size:11px;font-weight:700;letter-spacing:.14em;
}
/* heights are reserved up front so filling a slot cannot shift the layout */
.ad-box-banner{height:90px}
@media(min-width:760px){.ad-box-banner{height:90px;max-width:728px;margin:0 auto}}
.ad-box-content{height:250px;max-width:336px;margin:0 auto}
.ad-box-rect{height:250px;width:300px;margin:0 auto}
.ad-box-corner{height:100px;width:100%}

.ad-interstitial{
  position:fixed;inset:0;z-index:200;display:grid;place-items:center;
  background:rgba(15,23,42,.55);padding:20px
}
.ad-interstitial[hidden]{display:none}
.ad-interstitial-card{
  position:relative;background:#fff;border-radius:var(--radius);padding:44px 22px 22px;
  box-shadow:0 20px 60px -20px rgba(15,23,42,.5);max-width:360px;width:100%
}
.ad-note{margin:0 0 14px;font-size:14px;color:var(--ink-2);text-align:center}
.ad-close{
  position:absolute;top:8px;right:10px;width:32px;height:32px;border:0;background:transparent;
  font-size:24px;line-height:1;color:var(--ink-3);cursor:pointer;border-radius:8px
}
.ad-close:hover{background:var(--bg-alt);color:var(--ink)}
.ad-corner{
  position:fixed;right:16px;bottom:16px;z-index:190;width:250px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:0 12px 30px -12px rgba(15,23,42,.35);padding:26px 10px 10px
}
@media(max-width:520px){.ad-corner{right:10px;left:10px;width:auto}}

/* ---------- landing guides ---------- */
.crumbs{padding:14px 0 0;font-size:12.5px;color:var(--ink-3)}
.crumbs a{color:var(--ink-3)}
.crumbs span[aria-hidden]{margin:0 5px}
.hero-guide{padding:28px 0 34px}
.hero-guide h1{font-size:clamp(26px,4.8vw,40px);max-width:20ch}
.btn-hero{margin-top:6px}

.guide-body{display:grid;gap:34px}
.guide-section h2{font-size:clamp(19px,2.8vw,24px);margin-bottom:12px}
.guide-section p{color:var(--ink-2);font-size:16px;margin-bottom:14px}
.guide-section p:last-child{margin-bottom:0}
.guide-steps{margin:16px 0 0;padding-left:22px;display:grid;gap:9px}
.guide-steps li{color:var(--ink-2);font-size:15.5px;line-height:1.5}

.cta-band{background:var(--brand-soft);border-top:1px solid #dbeafe;border-bottom:1px solid #dbeafe;text-align:center}
.cta-band p{color:var(--ink-2)}

.rel-grid{display:grid;gap:12px}
@media(min-width:620px){.rel-grid{grid-template-columns:repeat(2,1fr)}}
.rel-card{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:15px 16px;text-decoration:none
}
.rel-card:hover{border-color:var(--line-2);text-decoration:none;background:var(--bg-soft)}
.rel-title{display:block;font-size:15px;font-weight:700;color:var(--ink);margin-bottom:4px}
.rel-sub{display:block;font-size:13px;color:var(--ink-3);line-height:1.5}

.footer-links{display:flex;flex-wrap:wrap;gap:8px 18px;margin-bottom:14px;padding-bottom:14px;border-bottom:1px solid #1e293b}
.footer-links a{color:#cbd5e1;font-size:13px}

/* ---------- legal pages ---------- */
.legal-updated{margin-top:8px;font-size:12.5px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.legal-nav{display:flex;flex-wrap:wrap;gap:8px 16px;padding-top:16px;border-top:1px solid var(--line)}
.legal-nav a,.legal-nav .legal-current{font-size:13px}
.legal-nav .legal-current{color:var(--ink-3);font-weight:600}
.footer-legal{margin-top:-4px}
.footer-legal a{color:#94a3b8;font-size:12.5px}