/* QR Code Generator - premium dark-glass (v1.19.74).
   Matte black base, glass cards, green glow, soft accent, smooth spring-like
   transitions. Fully scoped under #qr-app so nothing bleeds into the theme. */

#qr-app { max-width: var(--content-w); }
#qr-app { color-scheme: dark; }
#qr-app [hidden] { display: none !important; }
#qr-app * { box-sizing: border-box; }
#qr-app ::selection { background: var(--green); color: #04160d; }
#qr-app :focus-visible { outline: 2px solid var(--green); outline-offset: 2px; }

.qr-wrap { max-width: 940px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }

/* message */
.qr-msg {
  display: none;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 13px;
  line-height: 1.5;
  border: 1px solid var(--border-2);
  background: var(--surface);
  color: var(--mid);
}
.qr-msg[hidden] { display: none; }
.qr-msg.qr-err { color: #ff6b6b; border-color: rgba(255, 107, 107, .32); background: rgba(255, 107, 107, .08); }
.qr-msg.qr-ok  { color: var(--green); border-color: var(--green-border); background: var(--green-dim); }

/* glass card */
.qr-card {
  background: rgba(17, 19, 24, .72);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  backdrop-filter: blur(14px) saturate(120%);
  border: 1px solid rgba(136, 150, 170, .14);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, .4);
}

/* layout: settings first (single column), QR preview below them */
.qr-layout { display: grid; grid-template-columns: 1fr; gap: 20px; align-items: start; }

/* preview stage */
.qr-stage {
  display: flex; align-items: center; justify-content: center; min-height: 320px;
  border-radius: 12px; border: 1px dashed var(--border-2); padding: 24px;
  background:
    radial-gradient(120% 80% at 50% 0%, rgba(0, 255, 145, .06), transparent 60%),
    var(--surface-2);
}
#qr-canvas { display: block; max-width: 100%; height: auto; border-radius: 8px; transition: box-shadow .4s cubic-bezier(.22, 1, .36, 1); }

/* options */
.qr-ctrl { display: flex; flex-direction: column; gap: 16px; }
.qr-group { display: flex; flex-direction: column; gap: 8px; }
.qr-lbl { font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--dim); font-weight: 400; }
.qr-in { width: 100%; min-height: 44px; padding: 10px 12px; font: inherit; font-size: 15px; color: var(--text); background: rgba(24, 28, 36, .8); border: 1px solid var(--border-2); border-radius: 10px; }
.qr-in:focus { outline: none; border-color: var(--green-border); }
.qr-ta { min-height: 110px; resize: vertical; }
.qr-select { appearance: auto; cursor: pointer; }
.qr-other-hint { margin: 4px 0 0; font-size: 11px; color: var(--dim); line-height: 1.5; }

.qr-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.qr-range { flex: 1 1 140px; min-width: 0; accent-color: var(--green); height: 24px; }
.qr-val { flex: 0 0 auto; font-size: 12px; color: var(--dim); min-width: 44px; text-align: right; font-variant-numeric: tabular-nums; }

/* color pickers */
.qr-swatches { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.qr-swatch { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--mid); }
.qr-swatch input[type="color"] { width: 40px; height: 40px; border: 1px solid var(--border-2); border-radius: 10px; background: none; cursor: pointer; padding: 0; }

/* logo */
.qr-logo-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.qr-logo-row .qr-btn { flex: 0 1 auto; }

/* buttons */
.qr-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.qr-btn { -webkit-user-select: none; user-select: none;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  flex: 1 1 140px; min-height: 44px; padding: 0 16px; border-radius: 10px;
  cursor: pointer; font: inherit; font-size: 13.5px; font-weight: 700;
  white-space: nowrap; text-decoration: none;  border: 1px solid transparent; transition: box-shadow .18s, transform .12s, filter .18s;
}
.qr-btn:active { transform: translateY(1px); }
.qr-btn--primary { background: var(--green); color: #04160d; box-shadow: 0 6px 20px rgba(0, 255, 145, .18); }
.qr-btn--outline { background: transparent; color: var(--green); border-color: var(--green-border); }
.qr-btn--ghost { background: rgba(24, 28, 36, .8); color: var(--text); border-color: var(--border-2); }
.qr-btn--sm { flex: 0 0 auto; min-height: 36px; padding: 0 12px; font-size: 12px; }
.qr-btn.qr-disabled, .qr-btn[disabled] { opacity: .45; pointer-events: none; }
@media (hover: hover) {
  .qr-btn--primary:hover { filter: brightness(1.07); }
  .qr-btn--outline:hover { background: var(--green-dim); }
  .qr-btn--ghost:hover { border-color: var(--green-border); color: var(--text); }
  .qr-in:hover, .qr-swatch input[type="color"]:hover { border-color: var(--green-border); }
}

.qr-foot { font-size: 11px; color: var(--dim); text-align: center; line-height: 1.7; }

/* ══ v1.21.22 App #3 audit - section heads + related grid + FAQ (6-point law) ══ */
#qr-app .qr-sec { display: flex; align-items: center; gap: 10px; margin: 2px 0 14px; }
#qr-app .qr-sdot { width: 9px; height: 9px; border-radius: 50%; background: var(--green); flex: 0 0 auto; }
#qr-app .qr-sec h2 { margin: 0; font-size: 13px; font-weight: 700; letter-spacing: .06em; color: var(--text); font-family: var(--font-mono); }
#qr-app .qr-sec .qr-line { flex: 1 1 auto; height: 1px; background: var(--border-2); }

/* related grid */
#qr-app .qr-related { margin-top: 48px; }
#qr-app .qr-related-h, #qr-app .qr-faq-h {
  font-family: var(--font-mono); font-size: 14px; font-weight: 700; color: var(--text); margin: 0 0 20px;
}
#qr-app .qr-related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
#qr-app .qr-rel-card {
  display: flex; flex-direction: column; gap: 7px; padding: 20px;
  background: var(--surface); border: 1px solid var(--border-2); border-radius: 10px; text-decoration: none;
}

/* visible FAQ */
#qr-app .qr-faq { margin-top: 48px; }
#qr-app .qr-faq-item {
  border: 1px solid var(--border-2); border-radius: 10px; background: var(--surface);
  margin-bottom: 16px; overflow: hidden;
}
#qr-app .qr-faq-item summary {
  cursor: pointer; list-style: none; padding: 16px 18px;
  font-family: var(--font-mono); font-size: 13px; font-weight: 700; color: var(--text);
}
#qr-app .qr-faq-item summary::before { content: "\25B8  "; color: var(--green); }
#qr-app .qr-faq-item[open] summary::before { content: "\25BE  "; }
#qr-app .qr-faq-item p {
  margin: 0; padding: 0 18px 16px 32px;
  font-family: var(--font-mono); font-size: 12.5px; line-height: 1.7; color: var(--mid);
}
#qr-app .qr-rel-name { font-family: var(--font-mono); font-size: 13px; font-weight: 700; color: var(--text); }
#qr-app .qr-rel-desc { font-family: var(--font-mono); font-size: 11.5px; line-height: 1.5; color: var(--dim); }

/* hover effects - R5 law: gated */
@media (hover: hover) {
  #qr-app .qr-rel-card:hover { border-color: var(--green-border); }
  #qr-app .qr-rel-card:hover .qr-rel-name { color: var(--green); }
  #qr-app .qr-faq-item summary:hover { color: var(--green); }
}
/* v1.22.6 cross-browser audit: reduced-motion guard (house pattern) */
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; } }
/* v1.22.6 cross-browser audit: legacy iOS momentum hint */
#qr-canvas { -webkit-overflow-scrolling: touch; }