/* ═══════════════════════════════════════════════════════════════════
   qr-tool.css  -  QR Code Generator  |  Scoped under #qr-root
   Theme: Deep Ocean Blue × Electric Cobalt - Premium SaaS
   ⚠  ALL selectors scoped to #qr-root - zero bleed to other tools
═══════════════════════════════════════════════════════════════════ */

/* ── Design Tokens ─────────────────────────────────────────────── */
#qr-root {
  /* Backgrounds */
  --qr-bg:           #060c1a;
  --qr-surface:      #0b1424;
  --qr-surface2:     #101c32;
  --qr-surface3:     #152240;
  --qr-surface4:     #1a2a4e;

  /* Borders */
  --qr-border:       #192035;
  --qr-border2:      #1f2d4a;
  --qr-border3:      #2a3d63;

  /* Accent - electric cobalt blue */
  --qr-accent:       #2563eb;
  --qr-accent2:      #3b82f6;
  --qr-accent3:      #60a5fa;
  --qr-accent-dim:   rgba(37, 99, 235, 0.14);
  --qr-accent-glow:  rgba(37, 99, 235, 0.32);
  --qr-accent-ring:  rgba(59, 130, 246, 0.22);

  /* Semantic */
  --qr-ok:           #10b981;
  --qr-ok-dim:       rgba(16, 185, 129, 0.13);
  --qr-err:          #ef4444;
  --qr-err-dim:      rgba(239, 68, 68, 0.13);
  --qr-warn:         #f59e0b;

  /* Text */
  --qr-text:         #d4e2f8;
  --qr-text2:        #7fa0cc;
  --qr-muted:        #3d5580;

  /* Type */
  --qr-sans:  'Syne', 'DM Sans', system-ui, sans-serif;
  --qr-body:  'DM Sans', 'Outfit', system-ui, sans-serif;
  --qr-mono:  'DM Mono', 'JetBrains Mono', monospace;

  /* Shape */
  --qr-radius:    14px;
  --qr-radius-sm:  9px;
  --qr-radius-xs:  5px;

  /* Shadow */
  --qr-shadow:    0 6px 40px rgba(0, 0, 0, 0.6);
  --qr-shadow-sm: 0 2px 14px rgba(0, 0, 0, 0.4);
  --qr-glow:      0 0 0 1px rgba(59,130,246,.2), 0 0 22px rgba(37,99,235,.15);

  --qr-ease: cubic-bezier(0.4, 0, 0.2, 1);

  font-family: var(--qr-body);
  background:  var(--qr-bg);
  color:       var(--qr-text);
  min-height:  100vh;
  box-sizing:  border-box;
}

#qr-root *, #qr-root *::before, #qr-root *::after { box-sizing: inherit; }

/* scrollbar */
#qr-root ::-webkit-scrollbar            { width: 5px; height: 5px; }
#qr-root ::-webkit-scrollbar-track      { background: var(--qr-surface); }
#qr-root ::-webkit-scrollbar-thumb      { background: var(--qr-border3); border-radius: 3px; }
#qr-root ::-webkit-scrollbar-thumb:hover{ background: var(--qr-muted); }

/* ── Hero ──────────────────────────────────────────────────────── */
.qr-hero {
  position: relative;
  text-align: center;
  padding: 58px 24px 44px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 65% 55% at 50% -5%, rgba(37,99,235,.2) 0%, transparent 70%),
    radial-gradient(ellipse 35% 30% at 85% 60%, rgba(96,165,250,.06) 0%, transparent 55%),
    var(--qr-bg);
  border-bottom: 1px solid var(--qr-border);
}

/* hex-grid noise */
.qr-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37,99,235,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,.04) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}
.qr-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 70px;
  background: linear-gradient(transparent, var(--qr-bg));
  pointer-events: none;
}

.qr-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin: 0 auto;
}

.qr-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--qr-accent-dim);
  border: 1px solid rgba(59,130,246,.28);
  color: var(--qr-accent3);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 22px;
  font-family: var(--qr-sans);
}
.qr-hero-badge svg { width: 13px; height: 13px; }

.qr-hero h1 {
  font-family: var(--qr-sans);
  font-size: clamp(28px, 5.5vw, 50px);
  font-weight: 800;
  letter-spacing: -.03em;
  color: #fff;
  margin: 0 0 16px;
  line-height: 1.05;
}
.qr-hero h1 span {
  background: linear-gradient(130deg, var(--qr-accent2) 0%, var(--qr-accent3) 60%, #a5f3fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.qr-hero p {
  font-size: clamp(13.5px, 2vw, 15.5px);
  color: var(--qr-text2);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.75;
}

/* ── Main Layout ───────────────────────────────────────────────── */
.qr-layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 20px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 100px;
  align-items: start;
}

/* ── Shared Card ───────────────────────────────────────────────── */
.qr-card {
  background: var(--qr-surface);
  border: 1px solid var(--qr-border2);
  border-radius: var(--qr-radius);
  box-shadow: var(--qr-shadow-sm);
  overflow: hidden;
}
.qr-card-head {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--qr-border);
  background: var(--qr-surface2);
}
.qr-card-title {
  font-family: var(--qr-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--qr-text2);
  flex: 1;
}
.qr-card-icon {
  width: 16px; height: 16px;
  color: var(--qr-accent2);
  flex-shrink: 0;
}
.qr-card-body { padding: 18px; }

/* ── LEFT COLUMN ───────────────────────────────────────────────── */
.qr-left { display: flex; flex-direction: column; gap: 16px; }

/* Type pills */
.qr-type-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  padding: 14px;
}
.qr-type-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 10px 6px 9px;
  background: var(--qr-surface2);
  border: 1px solid var(--qr-border2);
  border-radius: var(--qr-radius-sm);
  color: var(--qr-text2);
  font-family: var(--qr-body);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: all .16s var(--qr-ease);
  text-align: center;
  line-height: 1.2;
}
.qr-type-btn svg { width: 17px; height: 17px; }
.qr-type-btn:hover {
  background: var(--qr-surface3);
  border-color: var(--qr-accent2);
  color: var(--qr-text);
}
.qr-type-btn.is-active {
  background: var(--qr-accent-dim);
  border-color: var(--qr-accent2);
  color: var(--qr-accent3);
  box-shadow: 0 0 0 1px var(--qr-accent-ring);
}
.qr-type-btn svg { color: inherit; }

/* Dynamic input forms */
.qr-input-form { display: none; }
.qr-input-form.is-active { display: block; }

/* Form fields */
.qr-field { display: flex; flex-direction: column; gap: 7px; margin-bottom: 12px; }
.qr-field:last-child { margin-bottom: 0; }
.qr-label {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--qr-muted);
}
.qr-input, .qr-textarea, .qr-select {
  background: var(--qr-surface2);
  border: 1px solid var(--qr-border2);
  border-radius: var(--qr-radius-sm);
  color: var(--qr-text);
  font-family: var(--qr-body);
  font-size: 14px;
  padding: 10px 13px;
  width: 100%;
  outline: none;
  transition: border-color .16s var(--qr-ease), box-shadow .16s var(--qr-ease);
}
.qr-textarea {
  resize: vertical;
  min-height: 90px;
  font-family: var(--qr-mono);
  font-size: 12.5px;
  line-height: 1.6;
}
.qr-input:focus, .qr-textarea:focus, .qr-select:focus {
  border-color: var(--qr-accent2);
  box-shadow: var(--qr-glow);
}
.qr-select {
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%237fa0cc' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 34px;
  cursor: pointer;
}
.qr-select option { background: #0b1424; }

/* WiFi password show/hide toggle */
.qr-pw-wrap { position: relative; }
.qr-pw-wrap .qr-input { padding-right: 42px; }
.qr-pw-toggle {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--qr-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  transition: color .14s;
  display: flex;
  align-items: center;
}
.qr-pw-toggle:hover { color: var(--qr-accent3); }
.qr-pw-toggle svg { width: 15px; height: 15px; }

/* ── Customisation ─────────────────────────────────────────────── */
.qr-custom-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* Size slider */
.qr-slider-wrap { position: relative; }
.qr-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 5px;
  background: var(--qr-border3);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
  transition: background .14s;
}
.qr-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--qr-accent2);
  box-shadow: 0 0 8px var(--qr-accent-glow);
  cursor: pointer;
  transition: box-shadow .14s;
}
.qr-slider::-moz-range-thumb {
  width: 18px; height: 18px;
  border: none;
  border-radius: 50%;
  background: var(--qr-accent2);
  cursor: pointer;
}
.qr-slider:hover::-webkit-slider-thumb { box-shadow: 0 0 14px var(--qr-accent-glow); }
.qr-slider-val {
  font-family: var(--qr-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--qr-accent3);
  text-align: right;
  margin-top: 4px;
}

/* Color pickers */
.qr-color-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.qr-color-swatch {
  width: 36px; height: 36px;
  border-radius: 8px;
  border: 2px solid var(--qr-border3);
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color .14s;
  position: relative;
  overflow: hidden;
}
.qr-color-swatch:hover { border-color: var(--qr-accent2); }
.qr-color-swatch input[type="color"] {
  position: absolute;
  inset: -4px;
  width: calc(100% + 8px);
  height: calc(100% + 8px);
  border: none;
  padding: 0;
  cursor: pointer;
  opacity: 0;
}
.qr-color-hex {
  font-family: var(--qr-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--qr-text);
  background: var(--qr-surface2);
  border: 1px solid var(--qr-border2);
  border-radius: var(--qr-radius-xs);
  padding: 8px 10px;
  width: 100%;
  outline: none;
  transition: border-color .14s;
}
.qr-color-hex:focus { border-color: var(--qr-accent2); }

/* Gradient toggle */
.qr-toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 3px 0;
}
.qr-toggle-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--qr-text2);
}
.qr-switch {
  position: relative;
  width: 38px;
  height: 22px;
  flex-shrink: 0;
}
.qr-switch input { opacity: 0; width: 0; height: 0; }
.qr-switch-track {
  position: absolute;
  inset: 0;
  background: var(--qr-border3);
  border-radius: 100px;
  cursor: pointer;
  transition: background .18s;
}
.qr-switch input:checked + .qr-switch-track { background: var(--qr-accent); }
.qr-switch-track::before {
  content: '';
  position: absolute;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #fff;
  top: 3px; left: 3px;
  transition: transform .18s;
  box-shadow: 0 1px 4px rgba(0,0,0,.4);
}
.qr-switch input:checked + .qr-switch-track::before { transform: translateX(16px); }

/* Gradient color stops */
.qr-gradient-stops {
  display: none;
  gap: 10px;
}
.qr-gradient-stops.is-visible { display: flex; }

/* Logo upload */
.qr-logo-drop {
  border: 1.5px dashed var(--qr-border3);
  border-radius: var(--qr-radius-sm);
  padding: 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color .16s, background .16s;
  position: relative;
}
.qr-logo-drop:hover, .qr-logo-drop.drag-over {
  border-color: var(--qr-accent2);
  background: var(--qr-accent-dim);
}
.qr-logo-drop input[type="file"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}
.qr-logo-drop p {
  font-size: 12.5px;
  color: var(--qr-muted);
  margin: 0;
  line-height: 1.5;
}
.qr-logo-drop strong { color: var(--qr-accent3); }
.qr-logo-preview-row {
  display: none;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}
.qr-logo-preview-row.is-visible { display: flex; }
.qr-logo-thumb {
  width: 44px; height: 44px;
  border-radius: 8px;
  border: 1px solid var(--qr-border2);
  object-fit: contain;
  background: var(--qr-surface3);
}
.qr-logo-name {
  font-size: 12px;
  color: var(--qr-text2);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.qr-logo-remove {
  background: none;
  border: none;
  color: var(--qr-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  transition: color .13s;
  display: flex;
  align-items: center;
}
.qr-logo-remove:hover { color: var(--qr-err); }
.qr-logo-remove svg { width: 15px; height: 15px; }

/* ── RIGHT COLUMN - Preview ─────────────────────────────────────── */
.qr-right { display: flex; flex-direction: column; gap: 16px; position: sticky; top: 20px; }

/* Preview stage */
.qr-preview-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  padding: 32px 24px;
  position: relative;
}

/* Subtle corner marks */
.qr-preview-stage::before,
.qr-preview-stage::after {
  content: '';
  position: absolute;
  width: 18px; height: 18px;
  border-color: var(--qr-accent-dim);
  border-style: solid;
  transition: border-color .3s;
}
.qr-preview-stage::before {
  top: 14px; left: 14px;
  border-width: 2px 0 0 2px;
  border-radius: 3px 0 0 0;
}
.qr-preview-stage::after {
  bottom: 14px; right: 14px;
  border-width: 0 2px 2px 0;
  border-radius: 0 0 3px 0;
}
.qr-preview-stage.has-qr::before,
.qr-preview-stage.has-qr::after {
  border-color: rgba(59,130,246,.35);
}

/* Empty placeholder */
.qr-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  color: var(--qr-muted);
  text-align: center;
}
.qr-placeholder-icon {
  width: 64px; height: 64px;
  opacity: .25;
  color: var(--qr-accent2);
}
.qr-placeholder p {
  font-size: 14px;
  margin: 0;
  line-height: 1.6;
}
.qr-placeholder strong { display: block; font-size: 15px; color: var(--qr-text2); margin-bottom: 4px; }

/* Canvas wrapper */
#qr-canvas-wrap {
  display: none;
  position: relative;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 0 0 1px rgba(59,130,246,.15), 0 8px 40px rgba(0,0,0,.5);
  animation: qr-pop .25s cubic-bezier(.34,1.56,.64,1) both;
}
@keyframes qr-pop {
  from { opacity: 0; transform: scale(.88); }
  to   { opacity: 1; transform: scale(1); }
}
#qr-canvas-wrap canvas { display: block; max-width: 100%; height: auto; }

/* Loading spinner */
.qr-spinner {
  display: none;
  width: 40px; height: 40px;
  border: 3px solid var(--qr-border3);
  border-top-color: var(--qr-accent2);
  border-radius: 50%;
  animation: qr-spin .7s linear infinite;
}
@keyframes qr-spin { to { transform: rotate(360deg); } }
.qr-spinner.is-visible { display: block; }

/* Action buttons inside preview card */
.qr-preview-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 0 18px 18px;
}

/* ── Buttons ────────────────────────────────────────────────────── */
.qr-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: none;
  border-radius: var(--qr-radius-sm);
  font-family: var(--qr-body);
  font-size: 13.5px;
  font-weight: 700;
  padding: 10px 18px;
  cursor: pointer;
  transition: all .17s var(--qr-ease);
  white-space: nowrap;
  line-height: 1;
  text-decoration: none;
}
.qr-btn svg { width: 14px; height: 14px; flex-shrink: 0; }

.qr-btn-primary {
  background: linear-gradient(135deg, var(--qr-accent) 0%, var(--qr-accent2) 100%);
  color: #fff;
  box-shadow: 0 2px 14px rgba(37,99,235,.35);
}
.qr-btn-primary:hover {
  filter: brightness(1.13);
  box-shadow: 0 4px 22px rgba(37,99,235,.5);
  transform: translateY(-1px);
}
.qr-btn-primary:active { transform: none; filter: brightness(.96); }

.qr-btn-secondary {
  background: var(--qr-surface3);
  border: 1px solid var(--qr-border3);
  color: var(--qr-text2);
}
.qr-btn-secondary:hover {
  background: var(--qr-surface4);
  border-color: var(--qr-accent2);
  color: var(--qr-text);
}

.qr-btn-ghost {
  background: transparent;
  border: 1px solid var(--qr-border2);
  color: var(--qr-muted);
}
.qr-btn-ghost:hover {
  border-color: var(--qr-accent2);
  color: var(--qr-accent3);
  background: var(--qr-accent-dim);
}

.qr-btn-sm { padding: 7px 13px; font-size: 12.5px; }
.qr-btn-sm svg { width: 13px; height: 13px; }
.qr-btn-full { width: 100%; justify-content: center; }
.qr-btn-icon {
  padding: 9px;
  background: var(--qr-surface3);
  border: 1px solid var(--qr-border3);
  color: var(--qr-text2);
  border-radius: var(--qr-radius-sm);
  cursor: pointer;
  transition: all .16s var(--qr-ease);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.qr-btn-icon svg { width: 16px; height: 16px; }
.qr-btn-icon:hover {
  background: var(--qr-accent-dim);
  border-color: var(--qr-accent2);
  color: var(--qr-accent3);
}

/* Generate button */
#qr-btn-generate {
  width: 100%;
  justify-content: center;
  padding: 13px 18px;
  font-size: 15px;
  border-radius: var(--qr-radius-sm);
}

/* ── History Section ────────────────────────────────────────────── */
.qr-history-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 14px;
}
.qr-history-item {
  aspect-ratio: 1;
  border: 1.5px solid var(--qr-border2);
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  background: var(--qr-surface2);
  transition: border-color .15s, transform .15s;
  position: relative;
}
.qr-history-item:hover {
  border-color: var(--qr-accent2);
  transform: scale(1.04);
}
.qr-history-item img { width: 100%; height: 100%; object-fit: contain; }
.qr-history-item .qr-history-label {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(transparent, rgba(6,12,26,.9));
  color: var(--qr-text2);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: 8px 4px 4px;
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.qr-history-empty {
  grid-column: 1 / -1;
  text-align: center;
  font-size: 13px;
  color: var(--qr-muted);
  padding: 16px 0 8px;
}

/* ── SEO Section ────────────────────────────────────────────────── */
.qr-seo {
  max-width: 1080px;
  margin: 0 auto;
  padding: 48px 20px 80px;
  border-top: 1px solid var(--qr-border);
}
.qr-seo h2 {
  font-family: var(--qr-sans);
  font-size: clamp(18px, 3vw, 24px);
  font-weight: 700;
  color: var(--qr-text);
  margin: 0 0 12px;
  letter-spacing: -.015em;
}
.qr-seo h3 { font-size: 15px; font-weight: 700; color: var(--qr-text); margin: 28px 0 8px; }
.qr-seo p  { font-size: 14.5px; color: var(--qr-text2); line-height: 1.78; margin: 0 0 12px; }
.qr-seo code {
  font-family: var(--qr-mono);
  font-size: 12.5px;
  background: var(--qr-surface2);
  border: 1px solid var(--qr-border2);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--qr-accent3);
}

.qr-use-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 10px;
  margin: 14px 0 20px;
}
.qr-use-card {
  background: var(--qr-surface);
  border: 1px solid var(--qr-border);
  border-radius: var(--qr-radius-sm);
  padding: 14px 16px;
}
.qr-use-card h4 { font-size: 13px; font-weight: 700; color: var(--qr-accent3); margin: 0 0 5px; }
.qr-use-card p  { font-size: 12.5px; color: var(--qr-text2); margin: 0; line-height: 1.55; }

.qr-faq { margin-top: 12px; }
.qr-faq-item { border-bottom: 1px solid var(--qr-border); }
.qr-faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--qr-text);
  user-select: none;
  transition: color .15s;
}
.qr-faq-q:hover { color: var(--qr-accent3); }
.qr-faq-chevron {
  color: var(--qr-muted);
  flex-shrink: 0;
  transition: transform .18s var(--qr-ease);
}
.qr-faq-item.is-open .qr-faq-chevron { transform: rotate(180deg); }
.qr-faq-a {
  font-size: 14px;
  line-height: 1.75;
  color: var(--qr-text2);
  padding-bottom: 16px;
  display: none;
}
.qr-faq-item.is-open .qr-faq-a { display: block; }

/* ── Toast ─────────────────────────────────────────────────────── */
.qr-toast {
  position: fixed;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%) translateY(14px);
  background: var(--qr-surface3);
  border: 1px solid var(--qr-border3);
  color: var(--qr-text);
  font-size: 13.5px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 100px;
  box-shadow: var(--qr-shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s var(--qr-ease), transform .22s var(--qr-ease);
  z-index: 9999;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}
.qr-toast.is-visible { opacity: 1; transform: translateX(-50%) translateY(0); }
.qr-toast.ok   { border-color: rgba(16,185,129,.4); color: var(--qr-ok); }
.qr-toast.warn { border-color: rgba(245,158,11,.4);  color: var(--qr-warn); }
.qr-toast svg  { width: 14px; height: 14px; flex-shrink: 0; }

/* ── Mobile sticky bar ─────────────────────────────────────────── */
.qr-mobile-bar {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--qr-surface);
  border-top: 1px solid var(--qr-border2);
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
  gap: 8px;
  z-index: 100;
  box-shadow: 0 -4px 24px rgba(0,0,0,.4);
}

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 780px) {
  .qr-layout {
    grid-template-columns: 1fr;
    padding-bottom: 90px;
  }
  .qr-right { position: static; }
  .qr-type-grid { grid-template-columns: repeat(4, 1fr); }
  .qr-mobile-bar { display: flex; }
  .qr-preview-actions { display: none; }
  .qr-custom-grid { grid-template-columns: 1fr; }
  .qr-hero { padding: 40px 16px 32px; }
}

@media (max-width: 480px) {
  .qr-layout { padding: 14px 12px 90px; gap: 14px; }
  .qr-card-body { padding: 14px; }
  .qr-type-grid { grid-template-columns: repeat(4, 1fr); gap: 5px; padding: 10px; }
  .qr-type-btn { font-size: 10px; padding: 8px 4px; }
  .qr-type-btn svg { width: 15px; height: 15px; }
  .qr-history-grid { grid-template-columns: repeat(3, 1fr); }
}