:root {
  --qr-accent: #22c55e;
  --qr-accent-2: #16a34a;
  --qr-accent-soft: rgba(34, 197, 94, 0.14);
  --qr-accent-line: rgba(34, 197, 94, 0.55);
  --qr-surface: rgba(255, 255, 255, 0.03);
  --qr-surface-2: rgba(255, 255, 255, 0.05);
  --qr-border: rgba(255, 255, 255, 0.08);
  --qr-border-strong: rgba(255, 255, 255, 0.16);
  --qr-text: rgba(255, 255, 255, 0.88);
  --qr-text-dim: rgba(255, 255, 255, 0.62);
  --qr-radius: 14px;
}

.qr-shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: 1.1rem 1.25rem 3rem;
}

.qr-back {
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s;
}
.qr-back:hover { color: var(--qr-accent); }

/* ---------- Hero ---------- */
.qr-hero { text-align: center; padding: 1.4rem 0 1.2rem; }
.qr-hero-kicker {
  display: inline-block;
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--qr-accent);
  margin-bottom: 0.45rem;
}
.qr-hero-title {
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
  font-weight: 800;
  margin: 0 0 0.5rem;
  background: linear-gradient(135deg, var(--qr-accent), var(--qr-accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.qr-hero-sub {
  color: var(--qr-text-dim);
  margin: 0 auto;
  max-width: 640px;
  font-size: 0.96rem;
  line-height: 1.5;
}
.qr-hero-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1rem;
}
.qr-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.74rem;
  color: var(--qr-text-dim);
  border: 1px solid var(--qr-border);
  background: var(--qr-surface);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
}
.qr-chip-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: linear-gradient(135deg, var(--qr-accent), var(--qr-accent-2));
  box-shadow: 0 0 8px rgba(34, 197, 94, 0.6);
}

/* ---------- Workspace ---------- */
.qr-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 1rem;
  align-items: start;
  margin-top: 1rem;
}

/* ---------- Glass panels ---------- */
.qr-panel {
  border: 1px solid var(--qr-border);
  border-radius: var(--qr-radius);
  background:
    radial-gradient(circle at 100% 0%, rgba(34, 197, 94, 0.05), transparent 45%),
    var(--qr-surface);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 1rem 1.1rem 1.15rem;
  margin-bottom: 1rem;
}
.qr-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}
.qr-panel-head h2 {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--qr-text-dim);
  margin: 0;
}

/* ---------- Content type tabs ---------- */
.qr-type-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}
.qr-type-tab {
  appearance: none;
  border: 1px solid var(--qr-border);
  background: var(--qr-surface-2);
  color: var(--qr-text-dim);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.18s ease;
}
.qr-type-tab:hover {
  color: #fff;
  border-color: var(--qr-border-strong);
}
.qr-type-tab.active {
  color: #052e16;
  background: linear-gradient(135deg, var(--qr-accent), var(--qr-accent-2));
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(34, 197, 94, 0.3);
}

/* ---------- Fields ---------- */
.qr-fields { display: none; flex-direction: column; gap: 0.7rem; }
.qr-fields.active { display: flex; }
.qr-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.78rem;
  color: var(--qr-text-dim);
  flex: 1;
}
.qr-field-row { display: flex; gap: 0.7rem; }
.qr-field-row .qr-field { min-width: 0; }

.qr-input,
.qr-select {
  width: 100%;
  box-sizing: border-box;
  padding: 0.6rem 0.7rem;
  border-radius: 9px;
  border: 1px solid var(--qr-border-strong);
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.18s, box-shadow 0.18s;
  font-family: inherit;
}
textarea.qr-input { resize: vertical; }
.qr-input:focus,
.qr-select:focus {
  border-color: var(--qr-accent-line);
  box-shadow: 0 0 0 3px var(--qr-accent-soft);
}
.qr-select option { background: #0b1220; color: #fff; }

.qr-color {
  width: 100%;
  height: 38px;
  padding: 2px;
  border-radius: 9px;
  border: 1px solid var(--qr-border-strong);
  background: rgba(255, 255, 255, 0.06);
  cursor: pointer;
}

.qr-range { width: 100%; accent-color: var(--qr-accent); cursor: pointer; }
.qr-val { color: var(--qr-accent); font-weight: 600; font-size: 0.74rem; }

.qr-check {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.8rem;
  color: var(--qr-text);
  cursor: pointer;
}
.qr-check input { accent-color: var(--qr-accent); width: 15px; height: 15px; }

/* ---------- Accordions ---------- */
.qr-acc { border-top: 1px solid var(--qr-border); }
.qr-acc:first-of-type { border-top: none; }
.qr-acc-head {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  border: none;
  color: var(--qr-text);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.7rem 0;
  cursor: pointer;
}
.qr-acc-caret { transition: transform 0.2s; color: var(--qr-text-dim); }
.qr-acc[data-acc-open="true"] .qr-acc-caret { transform: rotate(180deg); }
.qr-acc-body { display: none; padding: 0 0 0.85rem; flex-direction: column; gap: 0.7rem; }
.qr-acc[data-acc-open="true"] .qr-acc-body { display: flex; }

/* ---------- Logo drop ---------- */
.qr-logo-drop {
  display: block;
  border: 2px dashed var(--qr-border-strong);
  border-radius: 11px;
  padding: 1.1rem 0.8rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--qr-text-dim);
  cursor: pointer;
  transition: all 0.2s;
}
.qr-logo-drop:hover { border-color: var(--qr-accent-line); background: var(--qr-accent-soft); color: #fff; }

/* ---------- Buttons ---------- */
.qr-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.qr-btn {
  appearance: none;
  border: 1px solid var(--qr-border-strong);
  background: var(--qr-surface-2);
  color: var(--qr-text);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.6rem 1rem;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.18s ease;
  font-family: inherit;
}
.qr-btn:hover { border-color: var(--qr-accent-line); transform: translateY(-1px); }
.qr-btn-primary {
  background: linear-gradient(135deg, var(--qr-accent), var(--qr-accent-2));
  border-color: transparent;
  color: #052e16;
  box-shadow: 0 4px 16px rgba(34, 197, 94, 0.3);
}
.qr-btn-primary:hover { box-shadow: 0 8px 24px rgba(34, 197, 94, 0.42); }
.qr-btn-secondary { background: var(--qr-surface-2); }
.qr-btn-ghost { background: transparent; border-color: var(--qr-border); }

/* ---------- Preview ---------- */
.qr-preview-col { position: sticky; top: 1rem; }
.qr-preview-panel { display: flex; flex-direction: column; }
.qr-engine-tag {
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--qr-text-dim);
  border: 1px solid var(--qr-border);
  border-radius: 999px;
  padding: 0.15rem 0.5rem;
}
.qr-preview-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  padding: 1.2rem;
  border-radius: 12px;
  background:
    linear-gradient(45deg, rgba(255,255,255,0.02) 25%, transparent 25%) -8px 0,
    linear-gradient(-45deg, rgba(255,255,255,0.02) 25%, transparent 25%) -8px 0,
    linear-gradient(45deg, transparent 75%, rgba(255,255,255,0.02) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.02) 75%),
    var(--qr-surface);
  background-size: 16px 16px;
  border: 1px solid var(--qr-border);
}
.qr-preview-host { display: inline-flex; line-height: 0; border-radius: 8px; overflow: hidden; }
.qr-preview-host canvas,
.qr-preview-host svg { display: block; max-width: 100%; height: auto; border-radius: 8px; }
.qr-preview-empty {
  position: absolute;
  margin: 0;
  font-size: 0.85rem;
  color: var(--qr-text-dim);
  text-align: center;
}

/* ---------- Export ---------- */
.qr-export { display: flex; flex-direction: column; gap: 0.7rem; margin-top: 1rem; }
.qr-export-btns { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
.qr-export-btns #dlPng { grid-column: 1 / -1; }

/* ---------- History & presets ---------- */
.qr-history,
.qr-preset-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.7rem;
}
.qr-history-item,
.qr-preset-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  width: 74px;
  padding: 0.4rem;
  border: 1px solid var(--qr-border);
  border-radius: 10px;
  background: var(--qr-surface-2);
  cursor: pointer;
  transition: all 0.18s;
}
.qr-history-item:hover,
.qr-preset-item:hover { border-color: var(--qr-accent-line); transform: translateY(-2px); }
.qr-history-item img,
.qr-history-item canvas,
.qr-history-item svg {
  width: 100%; height: auto; border-radius: 5px; background: #fff;
}
.qr-history-label,
.qr-preset-label {
  font-size: 0.64rem;
  color: var(--qr-text-dim);
  max-width: 100%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: center;
}
.qr-preset-item {
  position: relative;
  flex-direction: row;
  width: auto;
  padding: 0.4rem 0.7rem;
  font-size: 0.78rem;
  color: var(--qr-text);
}
.qr-preset-del {
  border: none;
  background: none;
  color: var(--qr-text-dim);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0 0 0 0.3rem;
}
.qr-preset-del:hover { color: #ef4444; }

.qr-hint { font-size: 0.76rem; color: var(--qr-text-dim); margin: 0.6rem 0 0; line-height: 1.4; }
.qr-hint code {
  background: var(--qr-surface-2);
  padding: 0.05rem 0.3rem;
  border-radius: 4px;
  font-size: 0.72rem;
}

/* ---------- Pro badges / locks ---------- */
.qr-pro-badge {
  display: inline-block;
  margin-left: 5px;
  padding: 0.1em 0.42em;
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  background: linear-gradient(135deg, var(--qr-accent), var(--qr-accent-2));
  color: #052e16;
  border-radius: 4px;
  vertical-align: middle;
}
.qr-lockable[data-premium="1"] {
  position: relative;
  opacity: 0.78;
}
.qr-lockable[data-premium="1"]::after {
  content: "🔒";
  font-size: 0.72rem;
  margin-left: 4px;
}

/* ---------- Modal ---------- */
.qr-modal {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.qr-modal[hidden] { display: none; }
.qr-modal-card {
  width: 100%;
  max-width: 560px;
  background: rgba(12, 20, 32, 0.96);
  border: 1px solid var(--qr-border-strong);
  border-radius: 16px;
  padding: 1.3rem;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}
.qr-modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}
.qr-modal-head h3 { margin: 0; font-size: 1.05rem; color: #fff; }
.qr-modal-close {
  background: none; border: none; color: var(--qr-text-dim);
  font-size: 1.5rem; line-height: 1; cursor: pointer;
}
.qr-modal-close:hover { color: #fff; }
.qr-modal-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
  margin-top: 0.9rem;
}

/* ---------- Toasts ---------- */
.qr-toast-host {
  position: fixed;
  bottom: 1.2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9500;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}
.qr-toast {
  pointer-events: auto;
  min-width: 200px;
  max-width: 360px;
  padding: 0.7rem 1rem;
  border-radius: 10px;
  font-size: 0.85rem;
  color: #fff;
  background: rgba(20, 28, 40, 0.96);
  border: 1px solid var(--qr-border-strong);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.3s, transform 0.3s;
  cursor: pointer;
}
.qr-toast.show { opacity: 1; transform: translateY(0); }
.qr-toast.success { border-color: var(--qr-accent-line); }
.qr-toast.error { border-color: rgba(239, 68, 68, 0.6); }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
  .qr-workspace { grid-template-columns: 1fr; }
  .qr-preview-col { position: static; order: -1; }
}
@media (max-width: 560px) {
  .qr-field-row { flex-direction: column; gap: 0.7rem; }
  .qr-export-btns { grid-template-columns: 1fr; }
  .qr-export-btns #dlPng { grid-column: auto; }
}