/* ===== QR3Dify — design tokens ===== */
:root{
  --bg: #14171A;
  --surface: #1B1F23;
  --surface-2: #21262C;
  --line: #2C3238;
  --text: #F2F3F1;
  --text-dim: #9AA0A6;
  --text-faint: #6B7178;
  --accent: #FF6A3D;      /* filament orange — primary actions */
  --accent-dark: #E0552A;
  --accent-2: #2DD4BF;    /* filament teal — secondary / default relief color */
  --ok: #6EE7A8;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 8px 30px rgba(0,0,0,.35);
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'Inter', system-ui, -apple-system, sans-serif;
  --display: 'Space Grotesk', 'Inter', sans-serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){ html{scroll-behavior:auto;} *{animation-duration:.01ms !important; transition-duration:.01ms !important;} }

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}

a{color:var(--accent);}
img{max-width:100%;display:block;}

.wrap{max-width:1180px;margin:0 auto;padding:0 24px;}

/* ---- header ---- */
.site-header{
  position:sticky;top:0;z-index:40;
  background:rgba(20,23,26,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--display);font-weight:700;font-size:1.15rem;letter-spacing:-.01em;color:var(--text);text-decoration:none;}
.brand-mark{width:28px;height:28px;border-radius:7px;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:grid;place-items:center;font-size:.8rem;color:#0d0f11;font-weight:800;}
.site-header nav{display:flex;gap:26px;font-size:.92rem;}
.site-header nav a{color:var(--text-dim);text-decoration:none;}
.site-header nav a:hover{color:var(--text);}
.header-cta{background:var(--accent);color:#1a0d06;padding:9px 16px;border-radius:8px;font-weight:700;font-size:.88rem;text-decoration:none;}

/* ---- hero / tool ---- */
.hero{padding:38px 0 8px;}
.eyebrow{
  font-family:var(--mono);font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--accent-2);margin:0 0 10px;display:flex;align-items:center;gap:8px;
}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 3px rgba(110,231,168,.15);}
h1{
  font-family:var(--display);font-size:clamp(1.7rem,3.4vw,2.6rem);line-height:1.08;letter-spacing:-.02em;
  margin:0 0 12px;max-width:820px;
}
.hero-sub{color:var(--text-dim);max-width:640px;margin:0 0 26px;font-size:1.02rem;}

.tool-shell{
  display:grid;grid-template-columns:340px 1fr;gap:0;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow);
}
@media (max-width:880px){ .tool-shell{grid-template-columns:1fr;} }

/* controls panel */
.controls{padding:22px;border-right:1px solid var(--line);}
@media (max-width:880px){ .controls{border-right:none;border-bottom:1px solid var(--line);} }

.field{margin-bottom:18px;}
.field label{display:block;font-size:.78rem;font-weight:600;color:var(--text-dim);text-transform:uppercase;letter-spacing:.04em;margin-bottom:7px;}
.field input[type="text"], .field input[type="url"], .field select, .field textarea{
  width:100%;background:var(--surface-2);border:1px solid var(--line);color:var(--text);
  padding:10px 12px;border-radius:8px;font-family:var(--sans);font-size:.94rem;
}
.field input:focus, .field select:focus, .field textarea:focus{outline:2px solid var(--accent);outline-offset:1px;}
.hint{font-size:.78rem;color:var(--text-faint);margin-top:5px;}

.tabs{display:flex;gap:6px;background:var(--surface-2);border-radius:9px;padding:4px;margin-bottom:20px;}
.tabs button{
  flex:1;background:transparent;border:0;color:var(--text-dim);padding:9px 10px;border-radius:6px;
  font-family:var(--sans);font-weight:600;font-size:.86rem;cursor:pointer;
}
.tabs button.active{background:var(--accent);color:#1a0d06;}

.shape-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;}
.shape-opt{
  background:var(--surface-2);border:1.5px solid var(--line);border-radius:9px;padding:10px 6px;
  text-align:center;cursor:pointer;color:var(--text-dim);font-size:.76rem;
}
.shape-opt svg{display:block;margin:0 auto 6px;}
.shape-opt.active{border-color:var(--accent);color:var(--text);background:rgba(255,106,61,.08);}

.color-row{display:flex;gap:10px;}
.color-field{flex:1;}
.color-field label{display:flex;justify-content:space-between;align-items:center;}
.swatch-input{display:flex;align-items:center;gap:8px;background:var(--surface-2);border:1px solid var(--line);border-radius:8px;padding:6px 10px;}
.swatch-input input[type="color"]{width:28px;height:28px;border:0;background:none;padding:0;border-radius:5px;cursor:pointer;}
.swatch-input span{font-family:var(--mono);font-size:.78rem;color:var(--text-dim);}

.upload-row{display:flex;gap:8px;align-items:center;}
.btn-ghost{
  background:var(--surface-2);border:1px solid var(--line);color:var(--text);padding:9px 12px;
  border-radius:8px;font-size:.85rem;cursor:pointer;font-family:var(--sans);font-weight:600;
}
.btn-ghost:hover{border-color:var(--accent);}
.emoji-strip{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px;}
.emoji-strip button{background:var(--surface-2);border:1px solid var(--line);border-radius:7px;font-size:1.15rem;padding:5px 8px;cursor:pointer;}
.emoji-strip button.active{border-color:var(--accent-2);background:rgba(45,212,191,.12);}

/* preview panel */
.preview{padding:22px;display:flex;flex-direction:column;}
.preview-stage{
  flex:1;min-height:340px;background:
    radial-gradient(circle at 30% 20%, rgba(255,106,61,.08), transparent 55%),
    var(--surface-2);
  border:1px solid var(--line);border-radius:12px;display:grid;place-items:center;position:relative;overflow:hidden;
}
.preview-stage canvas{max-width:100%;}
#canvas2d{background:#fff;border-radius:6px;image-rendering:pixelateds;}
.stage-hint{position:absolute;bottom:10px;left:0;right:0;text-align:center;font-size:.74rem;color:var(--text-faint);font-family:var(--mono);pointer-events:none;}

.scan-badge{
  position:absolute;top:12px;right:12px;background:rgba(110,231,168,.14);color:var(--ok);
  border:1px solid rgba(110,231,168,.3);font-family:var(--mono);font-size:.72rem;padding:5px 9px;border-radius:20px;
}

.export-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.btn{
  border:0;border-radius:9px;padding:12px 18px;font-weight:700;font-size:.9rem;cursor:pointer;font-family:var(--sans);
  display:inline-flex;align-items:center;gap:8px;
}
.btn-primary{background:var(--accent);color:#1a0d06;}
.btn-primary:hover{background:var(--accent-dark);}
.btn-secondary{background:var(--surface-2);color:var(--text);border:1px solid var(--line);}
.btn-secondary:hover{border-color:var(--accent-2);}
.btn[disabled]{opacity:.45;cursor:not-allowed;}

.dims-readout{font-family:var(--mono);font-size:.78rem;color:var(--text-dim);margin-top:10px;display:flex;gap:16px;flex-wrap:wrap;}
.dims-readout b{color:var(--text);}

/* ---- ad placeholders ---- */
.ad-slot{
  border:1.5px dashed #3A4148;background:repeating-linear-gradient(135deg,#1c2024,#1c2024 10px,#20252a 10px,#20252a 20px);
  color:var(--text-faint);display:grid;place-items:center;font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;
  border-radius:10px;text-transform:uppercase;
}
.ad-leaderboard{max-width:1180px;margin:26px auto;height:90px;width:calc(100% - 48px);}
.ad-incontent{max-width:728px;margin:34px auto;height:100px;width:calc(100% - 48px);}
.ad-corner{
  position:fixed;bottom:16px;right:16px;width:260px;height:80px;z-index:50;
  box-shadow:var(--shadow);background:#1c2024;
}
.ad-corner .ad-close{position:absolute;top:4px;right:6px;background:none;border:0;color:var(--text-faint);cursor:pointer;font-size:1rem;}
.ad-popup-overlay{
  position:fixed;inset:0;background:rgba(10,11,13,.7);display:none;place-items:center;z-index:100;
}
.ad-popup-overlay.show{display:grid;}
.ad-popup{width:min(420px,88vw);height:260px;background:#1c2024;border:1.5px dashed #3A4148;border-radius:14px;position:relative;display:grid;place-items:center;}
.ad-popup .ad-close{
  position:absolute;top:-14px;right:-14px;background:var(--text);color:#111;border:0;width:30px;height:30px;
  border-radius:50%;font-size:1rem;cursor:pointer;font-weight:700;
}

/* ---- sections ---- */
section.info{padding:60px 0;}
.section-head{max-width:640px;margin:0 0 34px;}
.section-head .eyebrow{margin-bottom:8px;}
h2{font-family:var(--display);font-size:clamp(1.4rem,2.6vw,1.9rem);letter-spacing:-.01em;margin:0 0 8px;}
.section-head p{color:var(--text-dim);margin:0;}

.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
@media (max-width:760px){.steps{grid-template-columns:1fr;}}
.step{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:22px;}
.step .num{font-family:var(--mono);color:var(--accent-2);font-size:.8rem;margin-bottom:10px;}
.step h3{font-family:var(--display);font-size:1.08rem;margin:0 0 8px;}
.step p{color:var(--text-dim);font-size:.92rem;margin:0;}

.use-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
@media (max-width:900px){.use-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:520px){.use-grid{grid-template-columns:1fr;}}
.use-card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:18px;}
.use-card .icon{font-size:1.5rem;margin-bottom:10px;}
.use-card h3{font-family:var(--sans);font-size:.98rem;margin:0 0 6px;}
.use-card p{color:var(--text-dim);font-size:.86rem;margin:0;}

.faq{max-width:760px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:none;border:0;color:var(--text);text-align:left;padding:18px 0;
  font-family:var(--sans);font-size:1rem;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;gap:12px;
}
.faq-q .chev{color:var(--accent-2);transition:transform .18s;flex:none;}
.faq-item.open .faq-q .chev{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease;}
.faq-a p{color:var(--text-dim);margin:0 0 18px;font-size:.92rem;line-height:1.6;}

footer{border-top:1px solid var(--line);padding:30px 0 60px;color:var(--text-faint);font-size:.82rem;}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;}

.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}