/* ============================================
   QR Code Generator
   ============================================ */

.qr-tool {
  margin: 2.5rem 0;
}

.qr-tabs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 0.65rem;
  margin-bottom: 1rem;
}

.qr-tab {
  min-height: 46px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

.qr-tab:hover,
.qr-tab:focus-visible {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.qr-tab.active {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-color: transparent;
  color: var(--on-primary);
  box-shadow: var(--shadow);
}

.qr-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(330px, 0.85fr);
  gap: 1.25rem;
  align-items: start;
}

.qr-form-wrap,
.qr-output {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.qr-form-wrap {
  padding: 1.25rem;
}

.qr-form {
  display: grid;
  gap: 1rem;
}

.qr-tool .form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.qr-tool .form-group {
  display: grid;
  gap: 0.45rem;
}

.qr-tool .form-group label {
  color: var(--text);
  font-weight: 700;
}

.qr-tool .control-input {
  width: 100%;
  min-height: 48px;
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  transition: var(--transition);
}

.qr-tool textarea.control-input {
  min-height: 128px;
  resize: vertical;
}

.qr-tool .control-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.15);
}

.qr-tool .control-input[type="color"] {
  min-height: 54px;
  padding: 0.35rem;
  cursor: pointer;
}

.qr-tool .control-input[type="range"] {
  padding-inline: 0;
  accent-color: var(--primary);
}

.qr-style {
  margin-top: 1.15rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--border);
}

.qr-output {
  position: sticky;
  top: 6rem;
  padding: 1.25rem;
}

.qr-preview-header,
.qr-quality-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.85rem;
}

.qr-preview-header {
  color: var(--text);
  font-weight: 800;
}

.qr-status-badge,
.qr-quality-head span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  background: rgba(var(--success-rgb), 0.12);
  color: var(--success);
  font-size: 0.85rem;
  font-weight: 800;
}

.qr-status-badge.warning,
.qr-quality-head span.warning {
  background: rgba(var(--warning-rgb), 0.14);
  color: var(--warning);
}

.qr-status-badge.danger,
.qr-quality-head span.danger {
  background: rgba(var(--danger-rgb), 0.12);
  color: var(--danger);
}

.qr-canvas-wrap {
  display: grid;
  place-items: center;
  min-height: 360px;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background:
    linear-gradient(45deg, var(--surface) 25%, transparent 25%),
    linear-gradient(-45deg, var(--surface) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--surface) 75%),
    linear-gradient(-45deg, transparent 75%, var(--surface) 75%),
    var(--bg);
  background-size: 22px 22px;
  background-position: 0 0, 0 11px, 11px -11px, -11px 0;
  overflow: hidden;
}

.qr-canvas-wrap canvas {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  image-rendering: pixelated;
}

.qr-quality {
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
}

.qr-quality-head {
  margin-bottom: 0.75rem;
}

.qr-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
}

.qr-metrics span {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  min-width: 0;
  padding: 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.qr-metrics strong {
  color: var(--text);
  font-size: 1rem;
}

.qr-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 1rem;
}

.qr-actions .btn-primary {
  grid-column: 1 / -1;
}

.qr-hint {
  margin-top: 0.85rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.qr-error {
  margin-top: 1rem;
  padding: 0.85rem;
  border: 1px solid rgba(var(--danger-rgb), 0.35);
  border-radius: 8px;
  background: rgba(var(--danger-rgb), 0.1);
  color: var(--danger);
  font-weight: 700;
}

.qr-print-sheet {
  display: none;
}

.qr-copy-buffer {
  position: fixed;
  inset: 0;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

@media (max-width: 900px) {
  .qr-layout {
    grid-template-columns: 1fr;
  }

  .qr-output {
    position: static;
  }
}

@media (max-width: 640px) {
  .qr-tool {
    margin-top: 1.5rem;
  }

  .qr-tabs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem;
  }

  .qr-tab {
    min-height: 44px;
    font-size: 0.92rem;
  }

  .qr-form-wrap,
  .qr-output {
    padding: 1rem;
  }

  .qr-tool .form-row,
  .qr-metrics,
  .qr-actions {
    grid-template-columns: 1fr;
  }

  .qr-canvas-wrap {
    min-height: 300px;
    padding: 0.75rem;
  }

  .qr-preview-header,
  .qr-quality-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.5rem;
  }
}

@media print {
  body > :not(.qr-print-sheet) {
    display: none !important;
  }

  .qr-print-sheet {
    display: grid !important;
    min-height: 100vh;
    place-items: center;
    padding: 1cm;
    background: var(--bg);
    color: var(--text);
    text-align: center;
  }

  .qr-print-sheet .qr-print-title {
    margin: 0;
    font-size: 20pt;
  }

  .qr-print-sheet img {
    width: min(75vw, 16cm);
    height: auto;
    margin: 1cm 0;
    image-rendering: pixelated;
  }

  .qr-print-sheet p {
    color: var(--text-muted);
    font-size: 10pt;
  }
}